A hydrolysis desulfurization integrated agent and its preparation method

Abstract

This invention relates to an integrated hydrolysis desulfurization agent and its preparation method, including steps such as raw material mixing, aging, molding, drying, calcination, and impregnation. By controlling the raw material composition, content, production process, and parameters, the prepared agent can achieve both high desulfurization capacity and precision while ensuring hydrolysis efficiency. Thus, the preparation of this integrated agent optimizes the blast furnace gas desulfurization process, reduces equipment investment and land occupation, alleviates the environmental pressure of SO2 emissions from blast furnace gas manufacturers, and contributes to cleaner production and process upgrading for enterprises.

Description

Technical Field

[0001] This invention belongs to the field of air pollution control, specifically referring to a desulfurization treatment method for blast furnace gas in the ironmaking industry, and specifically relates to an integrated hydrolysis desulfurization agent and its preparation method. Background Technology

[0002] The total sulfur content in blast furnace gas is 50–180 mg / m³. 3 Of this, COS (carbonyl sulfide) accounts for 75%, and H2S accounts for 25%. Considering the characteristics of blast furnace gas, the desulfurization processes currently used in the market are generally hydrolysis + TRT + dry desulfurization or wet desulfurization, as well as TRT + hydrolysis + dry desulfurization or wet desulfurization.

[0003] Currently, the solid catalysts used for hydrolysis in China mainly include Al2O3-based, TiO2-based, and activated carbon-based catalysts, with a certain amount of active components impregnated onto the matrix. Since the COS hydrolysis rate of pure γ-Al2O3 is only 51.2%, alkali metals, alkaline earth metals, and other active components are usually added. The activity from highest to lowest is Cs2O / γ-Al2O3, K2O / γ-Al2O3, BaO / γ-Al2O3 > Na2O / γ-Al2O3, CaO / γ-Al2O3 > MgO / γ-Al2O3. Carbonyl sulfide undergoes the following reaction in the presence of a hydrolysis catalyst:

[0004] Commonly used dry desulfurization agents include activated carbon desulfurizers, zinc oxide desulfurizers, iron oxide desulfurizers, and molecular sieve desulfurizers. The choice of desulfurizer, as well as investment and operating costs, varies depending on different operating conditions and removal requirements.

[0005] The desulfurization principle of iron oxide desulfurization (iron-based desulfurizer) is that hydrogen sulfide reacts with the abundant basic hydroxyl groups on the surface of the iron-based desulfurizer to form iron sulfides. The desulfurization principle is: Fe2O3·H2O + 3H2S = Fe2S3·H2O + 3H2O, and the regeneration principle is: Fe2S3·H2O + 1.5O2 = Fe2O3·H2O + 3S. The desulfurization principle of activated carbon desulfurizer is that hydrogen sulfide and oxygen react under the catalytic action of active groups on the surface of activated carbon to form elemental sulfur, which is deposited in the micropores of the desulfurizer. The chemical reaction involved is: 2H2S + O2 = 2H2O + 2S.

[0006] Since the temperature of blast furnace gas before TRT (Turbine Residual Pressure Turbine Power Generation Unit) is generally 110-160℃, current hydrolysants are applicable under these conditions. However, sulfur deposition and sulfate buildup cause rapid poisoning and deactivation of the hydrolysants. After TRT, the temperature of blast furnace gas is 40-50℃, suitable for hydrogen sulfide removal. If a post-TRT hydrolysis + dry desulfurization process is adopted, the feed gas needs to be heated and cooled, resulting in high energy consumption. Therefore, considering the low calorific value and low added value of blast furnace gas, and the user's requirement to minimize desulfurization costs, developing a highly efficient hydrolysis-desulfurization integrated agent suitable for blast furnace gas purification has become an urgent technical problem to be solved.

[0007] Chinese invention patent publication CN112546845B discloses a hydrolysis-absorbing desulfurizing agent, its preparation method, and its application. This hydrolysis-absorbing desulfurizing agent is obtained by mixing zinc sulfate, calcium hydroxide, and potassium hydroxide solutions. However, this hydrolysis-absorbing desulfurizing agent is not suitable for blast furnace gas. Chinese invention patent publication CN113426289A discloses a hydrolysis adsorbent that can be used for blast furnace gas desulfurization, but it involves directly mixing a catalyst and adsorbent with specific equipment for catalysis and adsorption, and its desulfurizing agent is not entirely perfect. Summary of the Invention

[0008] This invention addresses the technical problems of low calorific value and low added value of blast furnace gas, and the user's requirement to minimize desulfurization costs. It proposes a highly efficient hydrolytic desulfurization integrated agent suitable for blast furnace gas purification and its preparation method.

[0009] Specifically, this is achieved through technical solutions:

[0010] A method for preparing a hydrolysis desulfurization integrated agent includes the following steps:

[0011] (1) Mix 20-60 parts by weight of activated carbon precursor, 15-70 parts by weight of alumina powder and 5-15 parts by weight of inorganic binder; wherein the particle size of activated carbon precursor is 80-325 mesh, the particle size of alumina powder is 300-800 mesh and the particle size of inorganic binder is 80-200 mesh.

[0012] (2) Add 20 to 40 parts by weight of organic binder to the material mixed in step (1), and then continue mixing.

[0013] (3) Let the mixed materials from step (2) age for 12 to 72 hours.

[0014] (4) Place the material aged in step (3) into an extrusion molding device for extrusion molding.

[0015] (5) Place the material formed in step (4) into a drying oven and dry it at a temperature of 10 to 150°C for 1 to 12 hours.

[0016] (6) Place the material obtained after drying in step (5) into a carbonization furnace, keep the temperature inside the carbonization furnace at 600-900℃, and carbonize for 3-9 hours to obtain a carbonized dry mixture.

[0017] (7) Add an alkaline solution of an alkali metal to the dry mixture obtained after carbonization treatment in step (6) for impregnation; the amount of alkaline solution of the alkali metal added is 0.4 to 1.0 times the weight of the dry mixture obtained in step (6), and the mass concentration of the solute in the alkaline solution of the alkali metal is 10 to 35 wt.%.

[0018] (8) Place the material obtained after impregnation in step (7) into a drying oven and dry it at a temperature of 10 to 150°C for 1 to 12 hours to obtain the hydrolysis desulfurization integrated agent product.

[0019] Preferably, the activated carbon precursor includes one or more of coal, apricot shells, or coconut shells.

[0020] Preferably, the alumina powder includes one or more of α-Al2O3, γ-Al2O3, ρ-Al2O3, θ-Al2O3, or boehmite.

[0021] Preferably, the inorganic binder includes one or more of sheep liver clay, bentonite, diatomaceous earth or attapulgite.

[0022] Preferably, the organic binder includes one or more of coal tar, tung oil, or light bitumen.

[0023] Preferably, the extrusion molding device is one of a hydraulic extruder or a screw extruder.

[0024] Preferably, the alkaline solution of the alkali metal includes an aqueous solution of one or more of lithium carbonate, sodium carbonate, potassium carbonate, rubidium carbonate, lithium hydroxide, sodium hydroxide, potassium hydroxide, or rubidium hydroxide.

[0025] Preferably, the drying temperature in step (5) is 60-150°C, and the drying temperature in step (8) is 50-150°C.

[0026] A hydrolytic desulfurization agent is prepared using the above-described preparation method.

[0027] Preferably, the radial crushing strength of the hydrolysis desulfurization agent is 80-160 N / cm, the hydrolysis efficiency at 60℃ is 90-99%, and the sulfur penetration capacity is 16-25%.

[0028] A method for treating blast furnace gas using an integrated hydrolysis desulfurization agent includes the following steps:

[0029] I. The hydrolytic desulfurization agent is prepared by the preparation method of any one of claims 1 to 7.

[0030] II. Place the hydrolysis desulfurization agent in a fixed-bed reactor, seal the feed inlet, and introduce nitrogen gas to replace and vent the gas in the fixed-bed reactor.

[0031] III. Switch the gas inlet to blast furnace gas, control the gas space velocity of the blast furnace gas to 1000-3000 h⁻¹, and set the reaction temperature to 30-120℃; carry out hydrolysis catalytic desulfurization treatment in a fixed-bed reactor, and the following reactions occur: COS + H₂O = H₂S + CO₂ and 2H₂S + O₂ = 2H₂O + 2S, so as to realize the hydrolysis catalytic desulfurization of blast furnace gas by the integrated hydrolysis desulfurization agent.

[0032] The technical effects of this invention are as follows:

[0033] (1) This invention addresses the current problems in blast furnace gas desulfurization and purification by developing an integrated hydrolysis and desulfurization agent and its preparation method. By rationally selecting specific activated carbon desulfurization methods and specific hydrolysis catalysts for specific process synthesis, the hydrolysis catalyst and desulfurization agent are combined into one, directly completing the two reactions COS+H2O=H2S+CO2 and 2H2S+O2=2H2O+2S in the same process. This reduces the overall usage of hydrolysis agent and desulfurization agent, optimizes the blast furnace gas desulfurization process, reduces equipment investment and land occupation. Furthermore, due to the rational combination of specific hydrolysis and desulfurization components, this invention can handle non-high-temperature gas, eliminating the need for cooling the blast furnace gas after TRT before hydrolysis and desulfurization. This reduces energy consumption, lowers the operating cost of blast furnace gas desulfurization, alleviates the environmental pressure of SO2 emissions from blast furnace gas users, and contributes to cleaner production and process upgrading for enterprises, resulting in significant economic and social benefits.

[0034] (2) This invention is not simply a mixture of hydrolysing agent and desulfurizing agent, but rather a process that rationally sets the matching relationship of each step. First, a portion of the materials are mixed, then an organic binder is added and mixed again, followed by a long period of aging. Aging facilitates the thorough mixing of several materials, promoting oxidation and hydration reactions. The aging of organic matter further enhances the plasticity of the materials, which is beneficial for later molding and strength improvement. The hydrolysis and desulfurization effects of the agents are also improved. After extrusion molding and drying, carbonization is performed, where the activated carbon precursor is carbonized in a uniformly mixed state with other materials. This strengthens the desulfurization effect and radial crushing strength. Next, by loading active components, the hydrolysis efficiency in this state is guaranteed. Simultaneously, by adjusting the parameters at each stage, the resulting integrated agent exhibits high radial crushing strength, high hydrolysis efficiency at 60℃, and high sulfur penetration capacity. Due to its high hydrolysis efficiency at 60℃, it can be matched with blast furnace gas, enabling efficient hydrolysis and desulfurization of the blast furnace gas.

[0035] (3) By setting specific steps for the reasonable matching and combination of each raw material, the present invention enables each raw material to not only exert its original effect, but also to produce a close mutual coordination and optimization effect, thereby making the overall treatment effect of the integrated agent better. Detailed Implementation

[0036] The technical solution of the present invention will be further described in conjunction with the embodiments:

[0037] Example 1

[0038] The preparation method of hydrolysis desulfurization agent includes the following steps: (1) Mix 30 parts by weight of coal, 60 parts by weight of γ-Al2O3 and 10 parts by weight of diatomite, wherein the particle size of coal is 120 mesh, the particle size of γ-Al2O3 is 400 mesh and the particle size of diatomite is 100 mesh.

[0039] (2) Add 30 parts by weight of tung oil to the materials mixed in step (1) and mix.

[0040] (3) Let the mixed materials from step (2) age for 48 hours.

[0041] (4) Extrude the material aged in step (3) into a mold.

[0042] (5) Dry the material formed in step (4) at 80°C for 6 hours.

[0043] (6) Carbonize the dried material from step (5) at 700°C for 4 hours in a carbonization furnace.

[0044] (7) Add sodium hydroxide solution to the carbonized material in step (6), wherein the amount of sodium hydroxide solution added is 0.5 times the weight of the dry mixture obtained in step (6), and the concentration of the sodium hydroxide solution is 20%.

[0045] (8) Dry the material impregnated in step (7) at 100°C for 3 hours to obtain the hydrolysis desulfurization integrated agent.

[0046] Through testing, the radial crushing strength of the hydrolysis desulfurization agent in this embodiment is 108 N / cm, the hydrolysis efficiency at 60℃ is 96.9%, and the sulfur penetration capacity is 21.8%.

[0047] Comparative Example 1

[0048] The preparation method of hydrolysis desulfurization agent includes the following steps: (1) Mix 30 parts by weight of coal, 60 parts by weight of γ-Al2O3 and 10 parts by weight of diatomite, wherein the particle size of coal is 120 mesh, the particle size of γ-Al2O3 is 400 mesh and the particle size of diatomite is 100 mesh.

[0049] (2) Add 30 parts by weight of tung oil to the materials mixed in step (1) and mix.

[0050] (3) Extrude the mixed material from step (2) into a mold.

[0051] (4) Dry the material formed in step (3) at 80°C for 6 hours.

[0052] (5) Carbonize the dried material from step (4) at 700°C for 4 hours in a carbonization furnace.

[0053] (6) Add sodium hydroxide solution to the carbonized material in step (5), wherein the amount of sodium hydroxide solution added is 0.5 times the weight of the dry mixture obtained in step (5), and the concentration of the sodium hydroxide solution is 20%.

[0054] (7) Dry the material impregnated in step (6) at 100°C for 3 hours to obtain the hydrolysis desulfurization integrated agent.

[0055] The comparative hydrolysis desulfurization agent tested showed a radial crushing strength of 57 N / cm, a hydrolysis efficiency of 76.9% at 60℃, and a sulfur penetration capacity of 12.8%.

[0056] This comparative example did not include a material aging process; other settings were basically the same as in Example 1. The resulting agent exhibited lower radial crushing strength (57 N / cm), indicating lower strength. Furthermore, its hydrolysis efficiency at 60°C and sulfur penetration capacity were significantly lower than in Example 1. This demonstrates that the various steps of this invention are closely coordinated. The aging step, along with its coordination with preceding and subsequent steps, enhances the overall technical effects, including strength, optimal temperature hydrolysis efficiency, and sulfur penetration capacity.

[0057] Example 2

[0058] The preparation method of the hydrolysis desulfurization agent includes the following steps: (1) 50 parts by weight of apricot shell, 30 parts by weight of ρ-Al2O3 and 5 parts by weight of sheep liver soil, wherein the particle size of apricot shell is 200 mesh, the particle size of ρ-Al2O3 is 600 mesh and the particle size of sheep liver soil is 180 mesh.

[0059] (2) Add 20 parts by weight of coal tar to the mixed material in step (1) and mix.

[0060] (3) Let the mixed materials from step (2) age for 60 hours.

[0061] (4) Extrude the material aged in step (3) into a mold.

[0062] (5) Dry the material formed in step (4) at 60°C for 10 hours.

[0063] (6) Carbonize the dried material from step (5) at 800°C for 6 hours in a carbonization furnace.

[0064] (7) Add potassium carbonate solution to the carbonized material in step (6), wherein the amount of potassium carbonate solution added is 0.75 times the weight of the dry mixture obtained in step (6), and the concentration of the potassium carbonate solution is 30%.

[0065] (8) Dry the material impregnated in step (7) at 90°C for 6 hours to obtain the hydrolysis desulfurization integrated agent.

[0066] Through testing, the radial crushing strength of the hydrolysis desulfurization agent in this embodiment is 97 N / cm, the hydrolysis efficiency at 60℃ is 97.8%, and the sulfur penetration capacity is 23.4%.

[0067] Example 3

[0068] The preparation method of hydrolytic desulfurization agent includes the following steps: (1) 60 parts by weight of coconut shell, 40 parts by weight of SB powder (high-quality high-purity pseudoboehmite produced from high-purity aluminum and high-grade alcohol as raw materials) and 15 parts by weight of bentonite, wherein the particle size of coconut shell is 200 mesh, the particle size of SB powder is 600 mesh, and the particle size of sheep liver clay is 180 mesh.

[0069] (2) Add 25 parts by weight of light asphalt to the material mixed in step (1) and mix.

[0070] (3) Let the mixed materials from step (2) age for 24 hours.

[0071] (4) Extrude the material aged in step (3) into a mold.

[0072] (5) Dry the material formed in step (4) at 120°C for 2 hours.

[0073] (6) Carbonize the dried material from step (5) at 650°C for 4 hours in a carbonization furnace.

[0074] (7) Add lithium carbonate solution to the carbonized material in step (6), wherein the amount of lithium carbonate added is 1 times the weight of the dry mixture obtained in step (6), and the concentration of lithium carbonate is 15%.

[0075] (8) Dry the material impregnated in step (7) at 110°C for 3 hours to obtain the hydrolysis desulfurization integrated agent.

[0076] Through testing, the radial crushing strength of the hydrolysis desulfurization agent in this embodiment is 123 N / cm, the hydrolysis efficiency at 60℃ is 95.3%, and the sulfur penetration capacity is 19.4%.

[0077] Comparative Example 2

[0078] The preparation method of the hydrolysis desulfurization agent includes the following steps: (1) 80 parts by weight of SB powder and 15 parts by weight of bentonite, wherein the particle size of SB powder is 600 mesh and the particle size of bentonite is 180 mesh.

[0079] (2) Add 25 parts by weight of light asphalt to the material mixed in step (1) and mix.

[0080] (3) Let the mixed materials from step (2) age for 24 hours.

[0081] (4) Extrude the material aged in step (3) into a mold.

[0082] (5) Dry the material formed in step (4) at 120°C for 2 hours.

[0083] (6) Carbonize the dried material from step (5) at 650°C for 4 hours in a carbonization furnace.

[0084] (7) Add lithium carbonate solution to the carbonized material in step (6), wherein the amount of lithium carbonate added is 1 times the weight of the dry mixture obtained in step (6), and the concentration of lithium carbonate is 15%.

[0085] (8) Dry the material impregnated in step (7) at 110°C for 3 hours to obtain the hydrolysis desulfurization integrated agent.

[0086] The comparative hydrolysis desulfurization agent tested showed a radial crushing strength of 289 N / cm, a hydrolysis efficiency of 98.3% at 60℃, and a sulfur penetration capacity of 2.3%.

[0087] This comparative example did not include any activated carbon precursor (such as the coconut shell raw material in Example 3), but the other settings were basically the same as in Example 3. As a result, compared with Example 3, the obtained agent had higher radial crushing strength and a hydrolysis efficiency of 98.3%, but a sulfur penetration capacity of only 2.3%. That is, by using the overall steps of this invention, a certain desulfurization effect can be achieved even without the addition of activated carbon precursor. This invention reasonably combines a specific proportion of activated carbon precursor as raw material with specific steps, so that the technical effects can achieve optimal matching with the blast furnace gas being treated.

[0088] Example 4

[0089] The preparation method of the hydrolysis desulfurization agent includes the following steps: (1) 20 parts by weight of coal, 20 parts by weight of apricot shell, 50 parts by weight of θ-Al2O3 and 18 parts by weight of attapulgite, wherein the particle size of coal is 180 mesh, the particle size of apricot shell is 150 mesh, the particle size of θ-Al2O3 is 500 mesh and the particle size of attapulgite is 200 mesh.

[0090] (2) Add 36 parts by weight of tung oil to the materials mixed in step (1).

[0091] (3) Let the mixed materials from step (2) age for 18 hours.

[0092] (4) Extrude the material aged in step (3) into a mold.

[0093] (5) Dry the material formed in step (4) at 140°C for 3 hours.

[0094] (6) Carbonize the dried material from step (5) at 750°C for 3 hours in a carbonization furnace.

[0095] (7) Add rubidium hydroxide solution to the carbonized material in step (6), wherein the amount of rubidium hydroxide solution added is 0.8 times the weight of the dry mixture obtained in step (6), and the concentration of alkali metal in the rubidium hydroxide solution is 25%.

[0096] (8) Dry the material impregnated in step (7) at 60°C for 12 hours to obtain the hydrolysis desulfurization integrated agent.

[0097] Through testing, the radial crushing strength of the hydrolysis desulfurization agent in this embodiment is 89 N / cm, the hydrolysis efficiency at 60℃ is 92.3%, and the sulfur penetration capacity is 18.9%.

[0098] Comparative Example 3

[0099] The preparation method of the hydrolysis desulfurization agent includes the following steps: (1) 45 parts by weight of coal, 45 parts by weight of apricot shell and 18 parts by weight of attapulgite, wherein the particle size of coal is 180 mesh, the particle size of apricot shell is 150 mesh and the particle size of attapulgite is 200 mesh.

[0100] (2) Add 36 parts by weight of tung oil to the materials mixed in step (1).

[0101] (3) Let the mixed materials from step (2) age for 18 hours.

[0102] (4) Extrude the material aged in step (3) into a mold.

[0103] (5) Dry the material formed in step (4) at 140°C for 3 hours.

[0104] (6) Carbonize the dried material from step (5) at 750°C for 3 hours in a carbonization furnace.

[0105] (7) Add rubidium hydroxide solution to the carbonized material in step (6), wherein the amount of rubidium hydroxide solution added is 0.8 times the weight of the dry mixture obtained in step (6), and the concentration of alkali metal in the rubidium hydroxide solution is 25%.

[0106] (8) Dry the material impregnated in step (7) at 60°C for 12 hours to obtain the hydrolysis desulfurization integrated agent.

[0107] The comparative hydrolysis desulfurization agent tested showed a radial crushing strength of 57 N / cm, a hydrolysis efficiency of 32.3% at 60℃, and a sulfur penetration capacity of 27.8%.

[0108] In this comparative example, no alumina powder (such as θ-Al2O3 in Example 4) was added. The other settings were basically the same as in Example 4. As a result, the obtained agent had lower radial crushing strength and hydrolysis efficiency, but higher sulfur penetration capacity. This proves that the raw materials of the present invention are synergistic and coordinated. The combination of active ingredients and alumina powder can greatly enhance hydrolysis efficiency, while the combination of active ingredients and other materials not of the present invention results in low hydrolysis efficiency. At the same time, the combination of all raw materials and process steps in the present invention makes the product strength meet the standard. The strength is reduced only because alumina powder was not added, which further proves that there is a strong synergistic relationship between the materials of the present invention.

[0109] Example 5

[0110] This embodiment illustrates a preparation method using multiple alumina powders in combination, specifically including the following steps:

[0111] (1) 45 parts by weight of coconut shell, 30 parts by weight of α-Al2O3, 25 parts by weight of SB powder, and 12 parts by weight of diatomaceous earth, wherein the particle size of coconut shell is 250 mesh, the particle size of α-Al2O3 is 300 mesh, the particle size of SB powder is 700 mesh, and the particle size of diatomaceous earth is 90 mesh.

[0112] (2) Add 35 parts by weight of coal tar to the materials mixed in step (1).

[0113] (3) Let the mixed materials from step (2) age for 70 hours.

[0114] (4) Extrude the material aged in step (3) into a mold.

[0115] (5) Dry the material formed in step (4) at 90°C for 7 hours.

[0116] (6) Carbonize the dried material from step (5) at 600°C for 8 hours in a carbonization furnace.

[0117] (7) Add potassium hydroxide solution to the carbonized material in step (6), wherein the amount of potassium hydroxide solution added is 0.9 times the weight of the dry mixture obtained in step (6), and the concentration of alkali metal in the potassium hydroxide solution is 27%.

[0118] (8) Dry the material impregnated in step (7) at 85°C for 9 hours to obtain the hydrolysis desulfurization integrated agent.

[0119] Through testing, the radial crushing strength of the hydrolysis desulfurization agent in this embodiment is 142 N / cm, the hydrolysis efficiency at 60℃ is 98.1%, and the sulfur penetration capacity is 23.4%.

[0120] The embodiments and comparative examples described above are merely illustrative and do not limit the scope of protection of the technical solutions. The omission of comparative technical features does not imply the lack of prominent substantive features; rather, they are merely descriptive of the arrangement.

Claims

1. A method for preparing a hydrolytic desulfurization integrated agent, characterized by, The method comprises the following steps: (1) mixing 20-60 parts by weight of active carbon precursor, 15-70 parts by weight of alumina powder and 5-15 parts by weight of inorganic binder; wherein the particle size of the active carbon precursor is 80-325 mesh, the particle size of the alumina powder is 300-800 mesh, and the particle size of the inorganic binder is 80-200 mesh; The active carbon precursor comprises a mixture of one or more of coal, apricot kernel or coconut shell; the alumina powder comprises a mixture of one or more of α-Al2O3, γ-Al2O3, ρ-Al2O3, θ-Al2O3 or pseudo-boehmite; (2) adding 20-40 parts by weight of organic binder to the mixture prepared in step (1) and then continuing to mix; (3) aging the mixture prepared in step (2) for 18-70 hours; (4) placing the aged mixture prepared in step (3) into an extrusion molding device for extrusion molding; (5) placing the molded mixture prepared in step (4) into a drying furnace and drying at a temperature of 60-150 ℃ for 1-12 hours; (6) placing the mixture obtained after drying in step (5) into a carbonization furnace, maintaining the temperature in the carbonization furnace at 600-900 ℃, and carbonizing for 3-9 hours, so that the active carbon precursor is carbonized in a state of being uniformly mixed with other materials, to obtain a dry mixture after carbonization treatment; (7) impregnating the dry mixture obtained after carbonization treatment in step (6) with an alkaline solution of an alkali metal; the amount of the alkaline solution of the alkali metal added is 0.4-1.0 times the weight of the dry mixture obtained in step (6), and the mass concentration of the solute in the alkaline solution of the alkali metal is 10-35 wt.%; the alkaline solution of the alkali metal comprises an aqueous solution of one or more of lithium carbonate, sodium carbonate, potassium carbonate, rubidium carbonate, lithium hydroxide, sodium hydroxide, potassium hydroxide or rubidium hydroxide; (8) placing the material obtained after impregnation in step (7) into a drying furnace and drying at a temperature of 50-150 ℃ for 1-12 hours, to obtain a hydrolysis and desulfurization integrated agent product; The radial crushing strength of the obtained hydrolysis and desulfurization integrated agent is 80-160 N / cm, the 60 ℃ hydrolysis efficiency is 90-99%, and the breakthrough sulfur capacity is 16-25%.

2. The preparation method of the hydrolysis desulfurization integrated agent according to claim 1, characterized in that, The inorganic binder comprises a mixture of one or more of sheep liver soil, bentonite, diatomite or attapulgite; The organic binder comprises a mixture of one or more of coal tar, tung oil or light asphalt.

3. The preparation method of the hydrolysis desulfurization integrated agent according to claim 1, characterized in that, The extrusion molding device is one of a hydraulic extruder or a screw extruder.

4. The preparation method of the hydrolysis desulfurization integrated agent according to claim 1, characterized in that, The drying temperature in step (5) is 60-140 ℃, and the drying temperature in step (8) is 60-110 ℃.

5. A hydrolytic desulfurization integrated agent, characterized by, The hydrolysis and desulfurization integrated agent is prepared by the preparation method of any one of claims 1-4.

6. The hydrodesulfurization integrated agent according to claim 5, wherein The radial crushing strength of the hydrolysis and desulfurization integrated agent is 80-160 N / cm, the 60 ℃ hydrolysis efficiency is 90-99%, and the breakthrough sulfur capacity is 16-25%.

7. A method for treating blast furnace gas with an integrated hydrodesulfurization agent, characterized in that, The method comprises the following steps: I. preparing a hydrolysis and desulfurization integrated agent by the preparation method of any one of claims 1-4; II, the hydrolysis desulfurization integrated agent is placed in a fixed bed reactor, the feeding port is closed, nitrogen is introduced to replace and empty the gas in the fixed bed reactor; III, the gas inlet is switched to blast furnace gas, the gas space velocity of the blast furnace gas is controlled to be 1000-3000 h-1, the reaction temperature is set to be 30-120 DEG C; the hydrolysis catalytic desulfurization treatment is carried out in the fixed bed reactor, the reactions of COS+H2O=H2S+CO2 and 2H2S+O2=2H2O+2S occur, and the hydrolysis catalytic simultaneous desulfurization treatment of the hydrolysis desulfurization integrated agent on the blast furnace gas is realized.