Establishment method and evaluation system for cost performance evaluation model of blast furnace gas desulfurizer

Abstract

The invention discloses a method and system for establishing a cost performance evaluation model of a blast furnace gas desulfurizer, and the method comprises the steps: determining the evaluation indexes required by the establishment of the cost performance evaluation model of the blast furnace gas desulfurizer: the actual desulfurization effect S and desulfurization cost P of the desulfurizer, and then calculating the cost performance index K of the desulfurizer through the evaluation indexes, k = the actual desulfurization effect S of the desulfurizer / the desulfurization cost P; the established desulfurizer cost performance evaluation model can provide technical support for economic purchase and preferential selection of blast furnace gas desulfurizers; according to the establishment method provided by the invention, the effective indexes influencing the actual desulfurization effect of the desulfurizing agent and the effective indexes influencing the desulfurization cost are clarified, the indexes influencing the actual desulfurization effect and cost of the desulfurizing agent are quantitatively evaluated in a unified manner, a certain guiding effect is provided for optimal selection of the blast furnace gas desulfurizing agent, and the optimal desulfurizing agent can be selected in an auxiliary manner; the desulfurization cost is reduced, the desulfurization effect is improved, and the cost performance of blast furnace gas desulfurization is maximized.

Description

Technical Field

[0001] The present application relates to the technical field of blast furnace gas desulfurization, and in particular to the optimal selection of cost-effectiveness of blast furnace gas desulfurizers, and specifically to a method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizers and an evaluation system. Background Art

[0002] Blast furnace gas is a combustible gas produced as a byproduct of the blast furnace ironmaking process. It has a large output and a wide range of uses. It can be used as fuel for power plant boilers, ironmaking plant hot blast furnaces, and steelmaking plant heating furnaces. The main components of blast furnace gas are CO, CO 2 、N 2 And a small amount of sulfide and chloride ion, among which the sulfide is mainly H 2 Mainly S and COS.

[0003] At present, the blast furnace gas produced in the blast furnace ironmaking process is directly used as fuel for power plant boilers, iron and steel plant hot blast furnaces, and steel plant heating furnaces without desulfurization treatment. Therefore, SO 2 The content of SO in the flue gas discharged usually does not meet the national ultra-clean emission requirements. 2 Content greater than 50mg / m 3 , some production plants emit SO 2 The content is as high as 250mg / m 3 above.

[0004] The existing blast furnace gas is used as fuel after dry dust removal and TRT or BPRT treatment. The downstream users of blast furnace gas such as hot blast furnaces, heating furnaces and self-provided gas-fired power plant units currently emit SO in the exhaust gas. 2 The concentration is basically unable to meet the national ultra-low emission concentration limit requirements (sulfur dioxide 50 mg / standard cubic meter), and there is a problem of acidic gas corrosion on gas pipelines. Therefore, it is urgent to desulfurize blast furnace gas.

[0005] The inventors realize that the desulfurizers currently used in the blast furnace gas fine desulfurization system are mostly adsorbents in the field of flue gas treatment. After being put into operation, it was found that such adsorbents are not suitable for the physical and chemical properties of blast furnace gas, and the phenomena manifested are poor desulfurization effect, frequent material replacement, and high desulfurization cost. Therefore, in the practice of blast furnace gas desulfurization, it is urgent to select products suitable as blast furnace gas desulfurizers based on desulfurization needs and cost factors, so as to reduce desulfurization costs, improve desulfurization effects, and maximize the cost-effectiveness of blast furnace gas desulfurization.

[0006] Therefore, it is urgent to propose a new technical solution to solve the problems existing in the prior art. Summary of the invention

[0007] The present application provides a method for establishing a cost-effectiveness evaluation model for a blast furnace gas desulfurizer and an evaluation system, which are used to solve the problem that enterprises are unable to scientifically select the optimal desulfurizer when purchasing desulfurizers, resulting in high desulfurization costs and poor desulfurization effects.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] On the one hand, the present application provides a method for establishing a cost-effectiveness evaluation model for a blast furnace gas desulfurizer, comprising the following steps:

[0010] S1: Determine the evaluation indicators required to establish a cost-effectiveness evaluation model for blast furnace gas desulfurizers, including the actual desulfurization effect S of the desulfurizer and the desulfurization cost P;

[0011] S2: Calculate the cost performance index K of the desulfurizer based on the evaluation index. The cost performance index K = actual desulfurization effect S of the desulfurizer ÷ desulfurization cost P. The unit of the cost performance index K is % / yuan;

[0012] Among them, the actual desulfurization effect S = working sulfur capacity W-deducted sulfur capacity W1, the working sulfur capacity W of each target evaluated desulfurizer is obtained by experimental measurement; the deducted sulfur capacity W1 of each target evaluated desulfurizer is calculated and determined by the correction function α;

[0013] The desulfurization cost P includes four sub-indicators, namely, the price of the desulfurizer entering the plant P1, the operating temperature T, the recycling price X, and the operating price P2;

[0014] Desulfurization cost P = desulfurizer price entering the factory P1 + recovery and processing price X + operating price P2.

[0015] In the above technical solution, the working sulfur capacity W is determined according to the following steps: 2 ml of the target desulfurizer is added to the reaction tube, and the wall of the reaction tube is knocked to make the desulfurizer bed flat and uniform; the raw gas is connected to the inlet end of the reaction tube, and the mass concentration of sulfur in the gas discharged from the outlet end of the reaction tube is recorded, and the working sulfur capacity W of the target desulfurizer is detected.

[0016] Furthermore, the actual desulfurization effect S of the desulfurizer includes seven sub-indicators, which are bulk density D, compressive strength Y, specific surface area B, pore volume K, space velocity V, working sulfur capacity W, and lost sulfur capacity W1.

[0017] Furthermore, the reduced sulfur capacity W1 is calculated as follows:

[0018] The reduced sulfur capacity W1 = 15*correction function α, correction function α = f(D, Y, B, K, V).

[0019] Furthermore, the specific expression of the correction function is:

[0020] α=f(D,Y,B,K,V)

[0021] =1-[(D / D 1 )*i 1 +(Y 1 / Y)*i 2 +(B 1 / B)*i 3 +(K 1 / K)*i 4 +(V 1 / V)*i 5 ]

[0022] Where: D represents the bulk density of the desulfurizer before use;

[0023] D 1 Indicates the bulk density of the desulfurizer after use;

[0024] Y represents the compressive strength of the desulfurizer before use;

[0025] Y 1 Indicates the compressive strength of the desulfurizer after use;

[0026] B represents the specific surface area of ​​the desulfurizer before use;

[0027] B 1 Indicates the specific surface area of ​​the desulfurizer after use;

[0028] K represents the pore volume before the desulfurizer is used;

[0029] K 1 Indicates the pore volume after the desulfurizer is used;

[0030] V represents the space velocity before the desulfurizer is used;

[0031] V 1 Indicates the space velocity after the desulfurizer is used;

[0032] i 1 +i 2 +i 3 +i 4 +i 5 =1, where i 1 、i 2 、i 3 、i 4 、i 5 are the influence weights of each parameter on the actual desulfurization effect of the desulfurizer.

[0033] Furthermore, the bulk density D is the ratio of the mass to the volume of the desulfurizer to be evaluated, and the unit of the bulk density D is g / ml.

[0034] Furthermore, the compressive strength Y is the physical property index of the desulfurizer to be evaluated, and the unit is N / cm 2 .

[0035] Furthermore, the specific surface area B is the ratio of the particle surface area of ​​the target desulfurizer to its volume. The unit of the specific surface area B is m 2 / g.

[0036] Furthermore, the unit of pore volume K is cm 3 / g.

[0037] Furthermore, the space velocity V is the ratio of the volume of gas processed per unit time to the volume of the desulfurizer to be evaluated, that is, the ratio of the gas flow rate to the volume of the desulfurizer to be evaluated. If the unit of the gas flow rate is ml / min and the unit of the desulfurizer volume is ml, the unit of the space velocity V is min. -1 .

[0038] Furthermore, the operating price P2 is calculated as follows:

[0039] Operating price P2 = [(90-T)×5]÷[(3×EP)], where EP is the unit price of cooling water and T is the operating temperature.

[0040] On the other hand, the present application also provides a blast furnace gas desulfurization agent cost performance evaluation system, comprising:

[0041] Memory for storing computer programs;

[0042] The processor is used to implement the steps of the method for establishing the above-mentioned blast furnace gas desulfurizer cost-effectiveness evaluation model when executing the computer program.

[0043] Compared with the prior art, this application has at least the following beneficial effects:

[0044] The present application provides a method for establishing a cost-effectiveness evaluation model for a blast furnace gas desulfurizer. The desulfurizer cost-effectiveness evaluation model established by this method can provide technical support for economical procurement and preferential selection of blast furnace gas desulfurizers, thereby scientifically reducing the desulfurization cost; in addition, the establishment method provided by the present application clarifies the effective indicators that affect the actual desulfurization effect of the desulfurizer and the effective indicators that affect the desulfurization cost, and uniformly quantifies the indicators that affect the actual desulfurization effect and cost of the desulfurizer, providing certain guidance for the optimal selection of blast furnace gas desulfurizers; it can assist in selecting the optimal desulfurizer to reduce the desulfurization cost, improve the desulfurization effect, and maximize the cost-effectiveness of blast furnace gas desulfurization. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be understood that the specific shapes and structures shown in the drawings should not usually be regarded as limiting conditions for implementing the present application; for example, based on the technical concepts and exemplary drawings disclosed in the present application, those skilled in the art are able to easily make routine adjustments or further optimizations to the increase / decrease / attribution division, specific shapes, positional relationships, connection methods, and dimensional ratios of certain units (components).

[0046] Figure 1 It is a flow chart of the evaluation steps for evaluating a target desulfurizer using the blast furnace gas desulfurizer cost performance evaluation system provided by the present application in an embodiment. DETAILED DESCRIPTION

[0047] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present application. The embodiments described are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0050] Embodiment 1

[0051] In order to solve the problems existing in the prior art, the present application provides a method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizers. The evaluation model established by this method can help purchasing personnel and technical personnel to evaluate and recommend the optimal desulfurizer, so as to reduce the desulfurization cost, improve the desulfurization effect, and maximize the cost-effectiveness of blast furnace gas desulfurization.

[0052] The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizers disclosed in the present application solves the problem of optimizing the selection of blast furnace gas desulfurizers. At the same time, the model can be used for cost-effectiveness evaluation of blast furnace gas desulfurizers such as lignite, activated carbon, iron oxide, and molecular sieves.

[0053] Based on the desulfurization reaction behavior of blast furnace gas, this application proposes the concept that desulfurizers can provide effective desulfurization for blast furnace gas. Eight indicators that affect the actual desulfurization effect of desulfurizers and four indicators that affect the desulfurization cost are determined, and a cost-effectiveness evaluation model for blast furnace gas desulfurizers is established. The model is easy to calculate and use, and has important guiding significance for the optimization selection of blast furnace gas desulfurizers. In other cases, the modification of corresponding indicators may also be used for cost-effectiveness evaluation of other types of products.

[0054] The following is a detailed description of the method for establishing the cost-effectiveness evaluation model for blast furnace gas desulfurizer provided in this application.

[0055] The present application provides a method for establishing a cost-effectiveness evaluation model for a blast furnace gas desulfurizer, which mainly includes the following steps:

[0056] S1: Determine the evaluation indicators required to establish a cost-effectiveness evaluation model for blast furnace gas desulfurizers, including the actual desulfurization effect S of the desulfurizer and the desulfurization cost P;

[0057] S2: The cost performance index K of the desulfurizer is calculated based on the evaluation index. The cost performance index K = the actual desulfurization effect S of the desulfurizer ÷ the desulfurization cost P. The unit of the cost performance index K is % / yuan.

[0058] The K value of the cost performance of different desulfurizers is calculated through the established evaluation model. Users can quantitatively evaluate the cost performance gap of different desulfurizers by comparing and analyzing the K value. The larger the K value, the higher the cost performance of the desulfurizer; the smaller the K value, the lower the cost performance of the desulfurizer. Based on this, the optimal selection of desulfurizers can be achieved.

[0059] It can be seen that the cost-effectiveness evaluation model of blast furnace gas desulfurizer established by the establishment method provided in this application is mainly based on two indicators: the actual desulfurization effect S of the blast furnace gas desulfurizer and the desulfurization cost P.

[0060] In the present application, the above-mentioned actual desulfurization effect S=working sulfur capacity W-deducted sulfur capacity W1, the working sulfur capacity W of each target evaluated desulfurizer is obtained by experimental measurement; the deducted sulfur capacity W1 of each target evaluated desulfurizer is calculated and determined by the correction function α.

[0061] Desulfurization cost P = desulfurizer price entering the factory P1 + recovery and processing price X + operating price P2.

[0062] Among them, the actual desulfurization effect S of the desulfurizer includes seven sub-indicators, which are bulk density D, compressive strength Y, specific surface area B, pore volume K, space velocity V, working sulfur capacity W, and lost sulfur capacity W1.

[0063] The desulfurization cost P includes four sub-indicators, namely the desulfurization agent price P1, working temperature T, recycling price X, and operation price P2.

[0064] The optimal cost performance of blast furnace gas desulfurizer refers to the best ratio between desulfurization performance and desulfurization price. To this end, this application establishes a cost performance index K based on the actual desulfurization effect of the desulfurizer.

[0065] In the present application, the working sulfur capacity W is determined according to the following steps: 2 ml of the target desulfurizer is added to the reaction tube, and the wall of the reaction tube is knocked to make the desulfurizer bed flat and uniform; the raw gas is connected to the inlet end of the reaction tube, and the mass concentration of sulfur in the gas discharged from the outlet end of the reaction tube is recorded, and the working sulfur capacity W of the target desulfurizer is detected.

[0066] In this application, the reduced sulfur capacity W1 is calculated according to the following method:

[0067] The depreciated sulfur capacity W1 = 15 * correction function α, correction function α = f (D, Y, B, K, V). In the actual production process, the bulk density, compressive strength, specific surface area, pore volume and air velocity of the desulfurizer will affect the desulfurization effect, so it is necessary to correct the sulfur capacity of the desulfurizer based on the laboratory test results.

[0068] In this application, bulk density D is the ratio of mass to volume of the target desulfurizer to be evaluated, and the unit of bulk density D is g / ml. Compressive strength Y is the physical property index of the target desulfurizer to be evaluated, and the unit is N / cm 2 The specific surface area B is the ratio of the particle surface area of ​​the target desulfurizer to its volume. The unit of specific surface area B is m 2 / g. The unit of pore volume K is cm 3 / g. The space velocity V is the ratio of the volume of gas processed per unit time to the volume of the target desulfurizer evaluated, that is, the ratio of the gas flow rate to the volume of the target desulfurizer evaluated. If the unit of the gas flow rate is ml / min and the unit of the desulfurizer volume is ml, the unit of the space velocity V is min. -1 .

[0069] The specific expression of the correction function α is:

[0070] α=f(D,Y,B,K,V)

[0071] =1-[(D / D 1 )*i 1 +(Y 1 / Y)*i 2 +(B 1 / B)*i 3 +(K 1 / K)*i 4 +(V1 / V)*i 5 ]

[0072] Where: D represents the bulk density of the desulfurizer before use; D 1 represents the bulk density after the desulfurizer is used; Y represents the compressive strength before the desulfurizer is used; Y 1 represents the compressive strength of the desulfurizer after use; B represents the specific surface area before the desulfurizer is used; B 1 represents the specific surface area after the desulfurizer is used; K represents the pore volume before the desulfurizer is used; K 1 represents the pore volume after the desulfurizer is used; V represents the space velocity before the desulfurizer is used; V 1 Indicates the air velocity after the desulfurizer is used; i 1 +i 2 +i 3 +i 4 +i 5 =1, where i 1 、i 2 、i 3 、i 4 、i 5 are the weights of each parameter on the actual desulfurization effect of the desulfurizer, that is, i 1 、i 2 、i 3 、i 4 、i 5 The specific weight of each can be determined according to the influence of the five parameters (bulk density D, compressive strength Y, specific surface area B, pore volume K, and space velocity V) on the actual desulfurization effect of the desulfurizer. Generally, different types of desulfurizers usually differ in performance parameters such as bulk density, compressive strength, specific surface area, pore volume, and space velocity. These differences are mainly determined by the material, preparation method, composition, and other characteristics of the desulfurizer.

[0073] The desulfurization effect of the desulfurizer is affected by many factors, among which bulk density, compressive strength, specific surface area, pore volume and air velocity are the key physical and chemical properties. The ranking of the degree of influence of these parameters on the desulfurization effect is not absolute, because there is an interaction between them, and the influence weight of each parameter may be different under different desulfurization systems and operating conditions. However, based on general principles and theoretical knowledge, the inventor ranks the degree of influence of these parameters as follows: specific surface area> pore volume> air velocity> bulk density> compressive strength, and the ranking analysis is as follows:

[0074] Specific surface area: It is generally believed that the specific surface area has the greatest impact on the desulfurization effect. The larger the specific surface area, the more active sites the desulfurizer provides, which is beneficial to improving the desulfurization efficiency because more sulfides can be adsorbed and reacted.

[0075] Pore ​​volume: Following the specific surface area, pore volume is also an important factor affecting the desulfurization effect. The larger the pore volume, the more space there is inside the desulfurizer to store the adsorbed sulfide, which helps to increase the desulfurization capacity.

[0076] Space velocity: The space velocity determines the speed at which the gas passes through the desulfurizer and has a direct impact on the desulfurization efficiency. Too high a space velocity may lead to insufficient contact time and affect the desulfurization effect; while too low a space velocity may lead to a decrease in the system's processing capacity.

[0077] Bulk density: Bulk density affects the volumetric efficiency of desulfurizer loading and the overall processing capacity of the system. Although the direct impact of bulk density on the desulfurization effect may not be as great as the above parameters, it affects the system design and operating costs, and indirectly affects the economic efficiency of the desulfurization effect.

[0078] Compressive strength: Compressive strength is mainly related to the durability and long-term stability of the desulfurizer. Although it has little effect on the immediate desulfurization efficiency, it plays an important role in ensuring the stability of the desulfurization effect in long-term continuous operation.

[0079] In one embodiment, after determining the desulfurization system and operating conditions for the desulfurization agent, the weights of the influence of bulk density, compressive strength, specific surface area, pore volume and space velocity on the actual desulfurization effect of the desulfurization agent can be configured as follows: i corresponding to the bulk density 1 =0.1, i corresponding to compressive strength 2 =0.05, i corresponding to the specific surface area 3 =0.45, i corresponding to the pore volume 4 =0.25, i corresponding to airspeed 5 =0.15. Of course, in other embodiments, the weight of each parameter may be adjusted according to factors such as actual demand conditions.

[0080] In this application, the operating price P2 is calculated as follows:

[0081] Operating price P2 = [(90-T)×5]÷[(3×EP)], where EP is the unit price of cooling water and T is the operating temperature.

[0082] Through the method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizers provided in this application, an evaluation model that can assist purchasing personnel in quickly selecting the best desulfurizer can be built. The establishment method provided in this application clarifies the effective indicators that affect the actual desulfurization effect of the desulfurizer and the effective indicators that affect the desulfurization cost, and unifies the quantitative evaluation of the indicators that affect the actual desulfurization effect and cost of the desulfurizer, providing a certain guiding role in the optimal selection of blast furnace gas desulfurizers. The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizers disclosed in this application solves the problem of optimizing the selection of blast furnace gas desulfurizers. The established model is easy to calculate and use, and has important guiding significance for the optimal selection of blast furnace gas desulfurizers.

[0083] Embodiment 2

[0084] Based on the method for establishing a blast furnace gas desulfurizer cost-effectiveness evaluation model provided in the above-mentioned embodiment 1, this embodiment provides a blast furnace gas desulfurizer cost-effectiveness evaluation system. The blast furnace gas desulfurizer cost-effectiveness evaluation system includes a memory for storing computer programs and a processor for executing computer programs. When executing the computer program, the processor can implement the steps of the method for establishing the above-mentioned blast furnace gas desulfurizer cost-effectiveness evaluation model.

[0085] The construction and use of the blast furnace gas desulfurizer cost-effectiveness evaluation system can help purchasing personnel and technical personnel to evaluate and recommend the optimal desulfurizer to reduce desulfurization costs, improve desulfurization effects, and maximize the cost-effectiveness of blast furnace gas desulfurization.

[0086] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0087] The above is a relatively specific and detailed description of the present application through general description and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizers, characterized in that: The steps include: S1: Determine the evaluation index required for establishing a cost-effectiveness evaluation model for a blast furnace gas desulfurizer, wherein the evaluation index includes the actual desulfurization effect S of the desulfurizer and the desulfurization cost P; S2: Calculate the cost performance index K of the desulfurizer based on the evaluation index, wherein the cost performance index K = actual desulfurization effect S of the desulfurizer ÷ desulfurization cost P, and the unit of the cost performance index K is % / yuan; Wherein, the actual desulfurization effect S=working sulfur capacity W-deducted sulfur capacity W1, the working sulfur capacity W of each target evaluated desulfurizer is obtained by experimental measurement; the deducted sulfur capacity W1 of each target evaluated desulfurizer is calculated and determined by the correction function α; The desulfurization cost P includes four sub-indicators, which are the price of the desulfurizer entering the factory P1, the working temperature T, the recycling price X, and the operating price P2; The desulfurization cost P = the price of the desulfurizer entering the factory P1 + the recovery and treatment price X + the operation price P2.

2. The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizer according to claim 1, characterized in that: The working sulfur capacity W is determined according to the following steps: 2 ml of the target desulfurizer is added into the reaction tube, and the wall of the reaction tube is knocked to make the desulfurizer bed flat and uniform; the raw gas is connected from the inlet end of the reaction tube, and the mass concentration of sulfur in the gas discharged from the outlet end of the reaction tube is recorded to detect and obtain the working sulfur capacity W of the target desulfurizer.

3. The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizer according to claim 1, characterized in that: The actual desulfurization effect S of the desulfurizer includes seven sub-indicators, which are respectively bulk density D, compressive strength Y, specific surface area B, pore volume K, space velocity V, working sulfur capacity W, and lost sulfur capacity W1.

4. The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizer according to claim 3, characterized in that: The depreciated sulfur capacity W1 is calculated as follows: The reduced sulfur capacity W1 = 15*correction function α, and the correction function α = f(D, Y, B, K, V).

5. The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizer according to claim 4, characterized in that: The specific expression of the correction function is: α=f(D,Y,B,K,V) =1-[(D / D1)*i1+(Y1 / Y)*i2+(B1 / B)*i3+(K1 / K)*i4+(V1 / V)*i5] Where: D represents the bulk density of the desulfurizer before use; D1 represents the bulk density after the desulfurizer is used; Y represents the compressive strength of the desulfurizer before use; Y1 represents the compressive strength after the desulfurizer is used; B represents the specific surface area of ​​the desulfurizer before use; B1 represents the specific surface area of ​​the desulfurizer after use; K represents the pore volume before the desulfurizer is used; K1 represents the pore volume after the desulfurizer is used; V represents the space velocity before the desulfurizer is used; V1 represents the space velocity after the desulfurizer is used; i1+i2+i3+i4+i5=1, where i1, i2, i3, i4, and i5 are the weights of influence of each parameter on the actual desulfurization effect of the desulfurizer.

6. The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizer according to claim 3, characterized in that: The bulk density D is the ratio of the mass to volume of the desulfurizer to be evaluated, and the unit of the bulk density D is g / ml; The compressive strength Y is the physical property index of the desulfurizer to be evaluated, and the unit is N / cm 2 ; The specific surface area B is the ratio of the particle surface area of ​​the target desulfurizer to its volume. The unit of specific surface area B is m 2 / g; The unit of the pore volume K is cm 3 / g; The space velocity V is the ratio of the volume of gas processed per unit time to the volume of the desulfurizer to be evaluated, that is, the ratio of the gas flow rate to the volume of the desulfurizer to be evaluated. If the unit of the gas flow rate is ml / min and the unit of the desulfurizer volume is ml, the unit of the space velocity V is min. -1 .

7. The method for establishing a cost-effectiveness evaluation model for blast furnace gas desulfurizer according to claim 1, characterized in that: The operating price P2 is calculated as follows: The operating price P2 = [(90-T)×5]÷[(3×EP)], where EP is the unit price of cooling water and T is the operating temperature.

8. A cost-effectiveness evaluation system for blast furnace gas desulfurizer, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the method for establishing a blast furnace gas desulfurizer cost-effectiveness evaluation model as described in any one of claims 1 to 7 when executing the computer program.

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