Coke oven gas pretreatment method and system

Abstract

The invention discloses a coke oven gas pretreatment method and system.The method comprises the steps that dust particle parameters of coke oven gas are detected, a dust removal mode is selected based on the dust particle parameters for dust removal treatment, and preliminarily purified coal gas is obtained; carrying out cooling treatment on the primarily purified coal gas, carrying out gas component and concentration detection on the cooled primarily purified coal gas through chromatographic analysis, and determining an impurity gas separation strategy according to a detection result; carrying out separation treatment on impurity gas in the preliminarily purified coal gas based on an impurity gas separation strategy, and meanwhile, carrying out desulfurization treatment on the separated coal gas; and carrying out impurity filtration and metal component removal on the treated coal gas, and storing the coal gas. The dedusting mode is intelligently selected for dedusting according to the distribution condition of the dust particles in the coal gas, so that the dedusting effect can be guaranteed to the maximum extent, meanwhile, impurity gas components in the coal gas can be accurately determined based on a chromatographic analysis form, and an effective separation strategy is formulated for separation.

Description

Technical Field

[0001] The present invention relates to the technical field of gas treatment, and particularly to a method and system for pretreating coke oven gas. Background Art

[0002] Coke oven gas (COG) is a by-product of the coking process, and its main components are hydrogen (H 2 , 55 - 65%), methane (CH 4 , 20 - 30%) and a small amount of CO, CO 2 etc., and at the same time contains a large amount of impurities, such as tar, benzene, naphthalene, hydrogen sulfide (H 2 S), ammonia (NH 3 ), hydrogen cyanide (HCN) and heavy metals (such as Hg, Pb, As), etc. These impurities will not only corrode equipment and block pipelines, but also affect the stable operation of subsequent processes (such as catalytic reforming, direct reduction ironmaking, etc.). The traditional method is to treat the gas based on cyclone dust removal, water washing and desulfurization. Its process is not only complicated, but the unified fixed process of a relatively large-scale system cannot guarantee the dust removal and cooling effects and the purity of the treated gas, making it difficult to meet the demand for high-quality gas, and reducing the product strength, practicability and stability. Summary of the Invention

[0003] In view of the problems shown above, the present invention provides a method and system for pretreating coke oven gas to solve the problems in the background art that the method of treating gas based on cyclone dust removal, water washing and desulfurization not only has a complicated process, but the unified fixed process of a relatively large-scale system cannot guarantee the dust removal and cooling effects and the purity of the treated gas, making it difficult to meet the demand for high-quality gas, and reducing the product strength, practicability and stability.

[0004] A method for pretreating coke oven gas includes the following steps: Detect the dust particle parameters of the coke oven gas, select a dust removal method based on the dust particle parameters for dust removal treatment, and obtain preliminarily purified gas; Cool the preliminarily purified gas, detect the gas components and concentrations of the cooled preliminarily purified gas through chromatographic analysis, and determine the impurity gas separation strategy according to the detection results; Separate the impurity gases in the preliminarily purified gas based on the impurity gas separation strategy, and at the same time perform desulfurization treatment on the separated gas; Filter the impurities and remove the metal components from the treated gas and store it.

[0005] Preferably, the step of detecting the dust particle parameters of the coke oven gas, selecting a dust removal method based on the dust particle parameters for dust removal treatment, and obtaining preliminarily purified gas includes: Detect the dust content of the coal gas through a dust sensor, configure the working parameters of the laser scattering particle analyzer based on the dust content, and use the configured laser scattering particle analyzer to detect the dust particle parameters of the coke oven gas; Collect the coal gas image in a fixed space, analyze the coal gas image to determine the dust particle distribution and morphological characteristics; Determine the multi-size particle distribution of the dust in the coal gas according to the dust particle parameters and the dust particle distribution and morphological characteristics, and determine the dust removal grade according to the multi-size particle distribution; Select a dust removal method according to the dust removal grade, determine a dust removal device based on the dust removal method, and perform dust removal treatment on the coke oven gas through the dust removal device to obtain preliminarily purified coal gas.

[0006] Preferably, cool the preliminarily purified coal gas, detect the gas components and concentrations of the cooled preliminarily purified coal gas through chromatographic analysis, and determine the impurity gas separation strategy according to the detection results, including: Obtain the temperature parameter of the preliminarily purified coal gas, determine the cooling method according to the temperature parameter, and the cooling methods include: indirect water cooling, direct spray cooling and staged water cooling; Determine the cooling process corresponding to the cooling method, cool the preliminarily purified coal gas through the cooling process, perform chromatographic analysis on the cooled preliminarily purified coal gas, and obtain the analysis result; Determine multiple gas components in the preliminarily purified coal gas and the concentration data of each gas component according to the analysis result and the preset gas chromatography configuration scheme; Determine the physical volatility properties and chemical reaction parameters of each gas component, and determine the impurity gas separation strategy for each gas component according to the physical volatility properties, chemical reaction parameters and the concentration data of the gas component.

[0007] Preferably, separate the impurity gases in the preliminarily purified coal gas based on the impurity gas separation strategy, and simultaneously perform desulfurization treatment on the separated coal gas, including: Determine the treatment priority index of each impurity gas through a preset decision dimension; Determine the first impurity gas with the same separation means and the second impurity gas with a single separation means based on the impurity gas separation strategy; Rank the first impurity gas and the second impurity gas according to the treatment priority index of each impurity gas, and sequentially separate the impurity gases based on the ranking result; Determine the desulfurization treatment amount of the coal gas, determine the absorption load according to the desulfurization treatment amount, select the solvent type according to the absorption load, configure the dosage of the target type solvent based on the desulfurization accuracy, and perform desulfurization treatment on the separated coal gas through the target type solvent.

[0008] Preferably, the step of filtering impurities and removing metal components from the processed coal gas and storing it includes: Removing organic impurities such as benzene and tar from the processed coal gas, and determining the multi-metal forms in the processed coal gas; Adsorbing heavy metal compounds in the coal gas through an activated carbon adsorption layer based on the multi-metal forms, and removing gaseous metal compounds in the coal gas through a low-temperature plasma reactor to obtain target purified coal gas; Determining the supply demand of the target purified coal gas, determining the pressurization range of the target purified coal gas according to the supply demand, and performing pressurization treatment; Storing the pressurized target purified coal gas and transporting it to downstream processes for supply.

[0009] A coke oven gas pretreatment system, which includes: A dust removal module, used to detect the dust particle parameters of coke oven gas, select a dust removal method based on the dust particle parameters for dust removal treatment, and obtain preliminarily purified coal gas; A determination module, used to cool the preliminarily purified coal gas, detect the gas components and concentrations of the cooled preliminarily purified coal gas through chromatographic analysis, and determine the impurity gas separation strategy according to the detection results; A processing module, used to separate the impurity gas in the preliminarily purified coal gas based on the impurity gas separation strategy, and simultaneously perform desulfurization treatment on the separated coal gas; A storage module, used to filter impurities and remove metal components from the processed coal gas and store it.

[0010] Preferably, the dust removal module includes: A detection sub-module, used to detect the dust content of the coal gas through a dust sensor, configure the working parameters of a laser scattering particle analyzer based on the dust content, and use the configured laser scattering particle analyzer to detect the dust particle parameters of coke oven gas; A first determination sub-module, used to collect the coal gas image in a fixed space, and analyze the coal gas image to determine the dust particle distribution and morphological characteristics; A second determination sub-module, used to determine the multi-particle size particle distribution of dust in the coal gas according to the dust particle parameters and the dust particle distribution and morphological characteristics, and determine the dust removal grade according to the multi-particle size particle distribution; A dust removal sub-module, used to select a dust removal method according to the dust removal grade, determine a dust removal device based on the dust removal method, and perform dust removal treatment on the coke oven gas through the dust removal device to obtain preliminarily purified coal gas.

[0011] Preferably, the determination module includes: A third determination sub-module, configured to obtain the temperature parameter of the preliminarily purified coal gas, and determine a cooling method according to the temperature parameter. The cooling methods include: indirect water cooling, direct spray cooling, and staged water cooling; A cooling sub-module, configured to determine a cooling process corresponding to the cooling method, cool the preliminarily purified coal gas through the cooling process, perform chromatographic analysis on the cooled preliminarily purified coal gas, and obtain an analysis result; A fourth determination sub-module, configured to determine multiple gas components in the preliminarily purified coal gas and the concentration data of each gas component according to the analysis result and a preset gas chromatography configuration scheme; A fifth determination sub-module, configured to determine the physical volatilization properties and chemical reaction parameters of each gas component, and determine an impurity gas separation strategy for each gas component according to the physical volatilization properties, chemical reaction parameters, and the concentration data of the gas component.

[0012] Preferably, the processing module includes: A sixth determination sub-module, configured to determine a processing priority index for each impurity gas through a preset decision dimension; A seventh determination sub-module, configured to determine a first impurity gas with the same separation means and a second impurity gas with a single separation means based on the impurity gas separation strategy; A first processing sub-module, configured to rank the first impurity gas and the second impurity gas according to the processing priority index of each impurity gas, and sequentially perform separation processing on the impurity gases based on the ranking result; A second processing sub-module, configured to determine the coal gas desulfurization treatment amount, determine the absorption load according to the desulfurization treatment amount, select a solvent type according to the absorption load, configure the dosage of the target type solvent based on the desulfurization accuracy, and perform desulfurization treatment on the separated coal gas through the target type solvent.

[0013] Preferably, the storage module includes: A first removal sub-module, configured to remove organic impurities such as benzene and tar from the processed coal gas, and determine the multi-metal forms in the processed coal gas; A second removal sub-module, configured to adsorb heavy metal compounds in the coal gas through an activated carbon adsorption layer based on the multi-metal forms, and remove gaseous metal compounds in the coal gas through a low-temperature plasma reactor to obtain target purified coal gas; An eighth determination sub-module, configured to determine the supply demand of the target purified coal gas, determine the pressurization range of the target purified coal gas according to the supply demand, and perform pressurization processing; A storage sub-module, configured to store the pressurized target purified coal gas and transport it to downstream processes for supply.

[0014] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the written description and the drawings.

[0015] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention.

[0017] Figure 1 It is a working flowchart of a method for pretreating coke oven gas provided by the present invention; Figure 2 It is another working flowchart of a method for pretreating coke oven gas provided by the present invention; Figure 3 It is a schematic structural diagram of a system for pretreating coke oven gas provided by the present invention; Figure 4 It is a schematic structural diagram of a dust removal module in a system for pretreating coke oven gas provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0019] Coke oven gas (COG) is a by-product of the coking process, and its main components are hydrogen (H 2 , 55 - 65%), methane (CH 4 , 20 - 30%) and a small amount of CO, CO 2 etc., and at the same time contains a large amount of impurities, such as tar, benzene, naphthalene, hydrogen sulfide (H 2 S), ammonia (NH 3), hydrogen cyanide (HCN), heavy metals (such as Hg, Pb, As), etc. These impurities can not only corrode equipment and block pipelines, but also affect the stable operation of subsequent processes (such as catalytic reforming, direct reduction ironmaking, etc.). The traditional method is based on the way of cyclone dust removal plus water washing plus desulfurization for gas treatment. It not only has a complex process, but also the unified fixed process of a large-scale system cannot ensure the dust removal and cooling effects and the purity of the treated gas, making it difficult to meet the demand for high-quality gas, and reducing the product power, practicability and stability. To solve the above problems, this embodiment discloses a method for separating gas to ensure the purity of gas based on dust particle detection, intelligent selection of dust removal methods, and formulation of different separation strategies for different gas components.

[0020] A method for pretreating coke oven gas, as Figure 1 shown, includes the following steps: Step S101, detecting the dust particle parameters of the coke oven gas, selecting a dust removal method based on the dust particle parameters for dust removal treatment, and obtaining preliminarily purified gas; Step S102, performing a cooling treatment on the preliminarily purified gas, detecting the gas components and concentrations of the cooled preliminarily purified gas by chromatographic analysis, and determining an impurity gas separation strategy according to the detection results; Step S103, separating the impurity gas in the preliminarily purified gas based on the impurity gas separation strategy, and simultaneously performing desulfurization treatment on the separated gas; Step S104, filtering impurities and removing metal components from the treated gas and storing it.

[0021] The working principle of the above technical solution is: detecting the dust particle parameters of the coke oven gas, selecting a dust removal method based on the dust particle parameters for dust removal treatment, and obtaining preliminarily purified gas; performing a cooling treatment on the preliminarily purified gas, detecting the gas components and concentrations of the cooled preliminarily purified gas by chromatographic analysis, and determining an impurity gas separation strategy according to the detection results; separating the impurity gas in the preliminarily purified gas based on the impurity gas separation strategy, and simultaneously performing desulfurization treatment on the separated gas; filtering impurities and removing metal components from the treated gas and storing it.

[0022] The beneficial effects of the above technical solution are as follows: By intelligently selecting the dust removal method according to the distribution of dust particles in the gas, the dust removal effect can be maximally ensured. At the same time, the impurity gas components in the gas can be accurately determined based on chromatographic analysis, and an effective separation strategy can be formulated for separation, ensuring the purity of the treated gas. Further, by deeply filtering impurities and removing metal components from the gas, the purity of the gas can be further ensured, improving the product power, practicability, and stability, and solving the problem in the prior art that when the gas is treated based on the method of cyclone dust removal plus water washing plus desulfurization, not only is the process complex, but the large-scale system with a unified fixed process cannot ensure the dust removal and cooling effects and the purity of the treated gas, making it difficult to meet the demand for high-quality gas and reducing the product power, practicability, and stability.

[0023] In one embodiment, as Figure 2 shown, detecting the dust particle parameters of the coke oven gas, selecting a dust removal method based on the dust particle parameters for dust removal treatment, and obtaining preliminarily purified gas includes: Step S201: Detect the dust content of the gas through a dust sensor, configure the working parameters of a laser scattering particle analyzer based on the dust content, and use the configured laser scattering particle analyzer to detect the dust particle parameters of the coke oven gas; Step S202: Collect gas images in a fixed space, and analyze the gas images to determine the dust particle distribution and morphological characteristics; Step S203: Determine the multi-particle size distribution of dust in the gas according to the dust particle parameters and the dust particle distribution and morphological characteristics, and determine the dust removal grade according to the multi-particle size distribution; Step S204: Select a dust removal method according to the dust removal grade, determine a dust removal device based on the dust removal method, and perform dust removal treatment on the coke oven gas through the dust removal device to obtain preliminarily purified gas.

[0024] The beneficial effects of the above technical solution are as follows: It is possible to perform intelligent and targeted dust removal work more refinedly and accurately according to the dust distribution characteristics, improving the dust removal effect.

[0025] In one embodiment, cooling the preliminarily purified gas, detecting the gas components and concentrations of the cooled preliminarily purified gas through chromatographic analysis, and determining an impurity gas separation strategy according to the detection results includes: Obtain the temperature parameter of the preliminarily purified gas, determine the cooling method according to the temperature parameter, and the cooling methods include: indirect water cooling, direct spray cooling, and staged water cooling; Determine the cooling process corresponding to the cooling method, perform cooling treatment on the preliminarily purified gas through the cooling process, perform chromatographic analysis on the cooled preliminarily purified gas, and obtain the analysis result; Determine multiple gas components in the preliminarily purified coal gas and the concentration data of each gas component according to the analysis results and the preset gas chromatography configuration scheme; Determine the physical volatility properties and chemical reaction parameters of each gas component, and determine the impurity gas separation strategy for each gas component according to the physical volatility properties, chemical reaction parameters, and the concentration data of the gas component.

[0026] The beneficial effects of the above technical solution are as follows: By intelligently selecting the cooling method, the best cooling effect can be ensured based on the real-time temperature of the coal gas, avoiding the loss of coal gas and cost loss. Further, by determining the impurity gas separation strategy for each gas component based on the physical volatility properties and chemical reaction parameters, the best separation strategy can be formulated according to the characteristics of physical and chemical reactions, ensuring the separation effect and separation stability.

[0027] In this embodiment, obtain the temperature parameters of the preliminarily purified coal gas, including: Obtain the calorific value parameters of the preliminarily purified coal gas from the furnace and the calorific value parameters of the converter, and calculate the calorific value difference vector according to the calorific value parameters of the furnace and the converter; Obtain the converter operation process parameters, and determine the doping ratio of the air flow and the coal gas flow during the converter process according to the converter operation process parameters and the calorific value difference vector; Determine the coal gas temperature change equilibrium effect according to the doping ratio, and determine the reference temperature calculation rule and the theoretical temperature upper limit and theoretical temperature lower limit of the coke oven gas according to the equilibrium effect; Calculate the first temperature parameter of the preliminarily purified coal gas according to the converter calorific value parameters based on the reference temperature calculation rule; Confirm whether the first temperature parameter is within the numerical range of the theoretical temperature upper limit and the theoretical temperature lower limit of the coke oven gas. If so, confirm the first temperature parameter as the temperature parameter of the preliminarily purified coal gas; If not, confirm the interval overlimit state of the first temperature parameter. The interval overlimit state includes: the state of being greater than the interval highest threshold and the state of being less than the interval lowest threshold; If the interval overlimit state is the state of being less than the interval lowest threshold, determine the transient temperature drop trend of the coal gas under the action of the converter; Determine the temperature correction parameter according to the transient temperature drop trend, correct the first temperature parameter according to the temperature correction parameter, obtain the second temperature parameter, and confirm the second temperature parameter as the temperature parameter of the preliminarily purified coal gas.

[0028] The beneficial effects of the above technical solution are as follows: By determining the air effect during the coke oven gas converter process to determine the temperature parameter, the accuracy and rationality of obtaining the temperature parameter can be ensured, ensuring that it is within the theoretical temperature range, and at the same time overcoming the influencing factors of temperature reduction caused by the contact between the coal gas and the air, ensuring the objectivity and accuracy of the data.

[0029] In one embodiment, the impurity gas in the preliminarily purified coal gas is separated based on the impurity gas separation strategy, and the separated coal gas is simultaneously desulfurized, including: Determine the treatment priority index of each impurity gas through a preset decision dimension; Based on the impurity gas separation strategy, determine the first impurity gas with the same separation means and the second impurity gas with a single separation means; Rank the first impurity gas and the second impurity gas according to the treatment priority index of each impurity gas, and sequentially separate the impurity gases based on the ranking result; Determine the coal gas desulfurization treatment amount, determine the absorption load according to the desulfurization treatment amount, select the solvent type according to the absorption load, configure the dosage of the target type solvent based on the desulfurization accuracy, and desulfurize the separated coal gas with the target type solvent.

[0030] The beneficial effects of the above technical solution are: Through intelligent sorting, sequential analysis can be carried out according to the separation urgency, which improves safety and ensures the stable progress of the separation work. Further, by configuring the dosage of the target type solvent, both the desulfurization effect and accuracy can be ensured, and at the same time, the volume of coal gas desulfurization can be handled, ensuring desulfurization stability.

[0031] In one embodiment, the processed coal gas is subjected to impurity filtration, removal of metal components, and storage, including: Remove organic impurities such as benzene and tar from the processed coal gas, and determine the multi-metal forms in the processed coal gas; Adsorb heavy metal compounds in the coal gas through an activated carbon adsorption layer based on the multi-metal form, and remove gaseous metal compounds in the coal gas through a low-temperature plasma reactor to obtain target purified coal gas; Determine the supply demand of the target purified coal gas, determine the pressurization range of the target purified coal gas according to the supply demand, and perform pressurization treatment; Store the pressurized target purified coal gas and transport it to downstream processes for supply.

[0032] The beneficial effects of the above technical solution are: By comprehensively removing different forms of metal compounds, the removal effect is ensured, further improving the purity of the coal gas. Further, by pressurizing the purified coal gas, the business adaptability of the coal gas can be ensured, further improving the practicality.

[0033] In one embodiment, this embodiment also discloses a coke oven gas pretreatment system, as Figure 3 shown, the system includes: The dust removal module 301 is used to detect the dust particle parameters of coke oven gas, select a dust removal method based on the dust particle parameters for dust removal treatment, and obtain preliminarily purified gas; The determination module 302 is used to cool the preliminarily purified gas, detect the gas components and concentrations of the cooled preliminarily purified gas through chromatographic analysis, and determine the impurity gas separation strategy according to the detection results; The processing module 303 is used to separate the impurity gas in the preliminarily purified gas based on the impurity gas separation strategy, and simultaneously perform desulfurization treatment on the separated gas; The storage module 304 is used to filter impurities and remove metal components from the processed gas and store it.

[0034] The working principle and beneficial effects of the above technical solution have been described in the method embodiment, and will not be elaborated here.

[0035] In one embodiment, as Figure 4 shown, the dust removal module 301 includes: The detection sub-module 3011 is used to detect the dust content of the gas through a dust sensor, configure the working parameters of a laser scattering particle analyzer based on the dust content, and use the configured laser scattering particle analyzer to detect the dust particle parameters of coke oven gas; The first determination sub-module 3012 is used to collect the gas image in a fixed space, and analyze the gas image to determine the dust particle distribution and morphological characteristics; The second determination sub-module 3013 is used to determine the multi-size particle distribution of dust in the gas according to the dust particle parameters and the dust particle distribution and morphological characteristics, and determine the dust removal grade according to the multi-size particle distribution; The dust removal sub-module 3014 is used to select a dust removal method according to the dust removal grade, determine a dust removal device based on the dust removal method, and perform dust removal treatment on the coke oven gas through the dust removal device to obtain preliminarily purified gas.

[0036] In one embodiment, the determination module includes: The third determination sub-module is used to obtain the temperature parameter of the preliminarily purified gas, determine the cooling method according to the temperature parameter, and the cooling methods include: indirect water cooling, direct spray cooling, and staged water cooling; The cooling sub-module is used to determine the cooling process corresponding to the cooling method, cool the preliminarily purified gas through the cooling process, perform chromatographic analysis on the cooled preliminarily purified gas, and obtain the analysis result; The fourth determination sub-module is used to determine multiple gas components in the preliminarily purified gas and the concentration data of each gas component according to the analysis result and the preset gas chromatography configuration scheme; A fifth determination sub-module, configured to determine the physical volatilization properties and chemical reaction parameters of each gas component, and determine the impurity gas separation strategy for each gas according to the physical volatilization properties, chemical reaction parameters, and concentration data of the gas component.

[0037] In one embodiment, the processing module includes: A sixth determination sub-module, configured to determine the processing priority index of each impurity gas through a preset decision dimension; A seventh determination sub-module, configured to determine the first impurity gas with the same separation means and the second impurity gas with a single separation means based on the impurity gas separation strategy; A first processing sub-module, configured to rank the first impurity gas and the second impurity gas according to the processing priority index of each impurity gas, and sequentially perform separation processing on the impurity gases based on the ranking result; A second processing sub-module, configured to determine the gas desulfurization treatment amount, determine the absorption load according to the desulfurization treatment amount, select the solvent type according to the absorption load, configure the dosage of the target type solvent based on the desulfurization accuracy, and perform desulfurization treatment on the separated gas by the target type solvent.

[0038] In one embodiment, the storage module includes: A first removal sub-module, configured to remove organic impurities such as benzene and tar from the processed gas, and determine the multi-metal forms in the processed gas; A second removal sub-module, configured to adsorb heavy metal compounds in the gas by an activated carbon adsorption layer based on the multi-metal forms, and remove gaseous metal compounds in the gas by a low-temperature plasma reactor to obtain the target purified gas; An eighth determination sub-module, configured to determine the supply demand of the target purified gas, determine the pressurization range of the target purified gas according to the supply demand, and perform pressurization treatment; A storage sub-module, configured to store the pressurized target purified gas and transport it to the downstream process for supply.

[0039] Those skilled in the art should understand that the first and second in the present invention refer to different application stages.

[0040] After considering the specification and practicing the disclosure herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0041] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A coke oven gas pretreatment method, characterized in that: The following steps are involved: Detect the dust particle parameters of coke oven gas, select a dust removal method based on the dust particle parameters to perform dust removal treatment, and obtain preliminary purified gas; Cooling the preliminary purified coal gas, testing the gas composition and concentration of the cooled preliminary purified coal gas by chromatographic analysis, and determining the impurity gas separation strategy based on the test results; Based on the impurity gas separation strategy, the impurity gas in the preliminary purified coal gas is separated and treated, and the separated coal gas is desulfurized at the same time; The treated gas is filtered for impurities and metal components and then stored.

2. The coke oven gas pretreatment method according to claim 1, characterized in that: The detecting of the dust particle parameters of the coke oven gas, selecting a dust removal method based on the dust particle parameters to perform dust removal treatment, and obtaining preliminary purified gas, includes: The dust content of the coal gas is detected by a dust sensor, the working parameters of the laser scattering particle analyzer are configured based on the dust content, and the dust particle parameters of the coke oven gas are detected by the configured laser scattering particle analyzer; Collect gas images in a fixed space, and analyze the gas images to determine the distribution and morphological characteristics of dust particles; Determine the multi-size particle distribution of dust in coal gas according to the dust particle parameters, dust particle distribution and morphological characteristics, and determine the dust removal level according to the multi-size particle distribution; The dust removal method is selected according to the dust removal level, and the dust removal equipment is determined based on the dust removal method. The coke oven gas is dusted by the dust removal equipment to obtain preliminary purified gas.

3. The coke oven gas pretreatment method according to claim 1, characterized in that: The preliminary purified coal gas is cooled, the gas composition and concentration of the cooled preliminary purified coal gas are detected by chromatographic analysis, and the impurity gas separation strategy is determined according to the detection results, including: Obtaining the temperature parameters of the preliminarily purified coal gas, and determining the cooling method according to the temperature parameters, the cooling methods including: indirect water cooling, direct spray cooling and graded water cooling; Determine a cooling process corresponding to the cooling method, cool the preliminary purified coal gas through the cooling process, perform chromatographic analysis on the cooled preliminary purified coal gas, and obtain analysis results; Determine multiple gas components in the preliminary purified coal gas and concentration data of each gas component according to the analysis results and a preset gas chromatography configuration scheme; The physical volatility properties and chemical reaction parameters of each gas component are determined, and the impurity gas separation strategy for each gas is determined based on the physical volatility properties, chemical reaction parameters and concentration data of the gas component.

4. The coke oven gas pretreatment method according to claim 1, characterized in that: The impurity gas in the preliminary purified coal gas is separated and processed based on the impurity gas separation strategy, and the separated coal gas is desulfurized, including: Determine the processing priority index of each impurity gas through preset decision dimensions; Determining a first impurity gas with the same separation means and a second impurity gas with a single separation means based on an impurity gas separation strategy; Prioritize the first impurity gas and the second impurity gas according to the treatment priority index of each impurity gas, and sequentially separate and treat the impurity gases based on the sorting results; Determine the desulfurization processing volume of the coal gas, determine the absorption load according to the desulfurization processing volume, select the solvent type according to the absorption load, configure the dosage of the target type solvent based on the desulfurization accuracy, and desulfurize the separated coal gas through the target type solvent.

5. The coke oven gas pretreatment method according to claim 1, characterized in that: The method of filtering impurities and removing metal components from the treated coal gas and storing the gas comprises: removing organic impurities such as benzene and tar from the treated gas and determining the polymetallic forms in the treated gas; Based on the multi-metal form, heavy metal compounds in the coal gas are adsorbed through the activated carbon adsorption layer, and the gaseous metal compounds in the coal gas are removed through the low-temperature plasma reactor to obtain the target purified coal gas; Determine the supply demand of the target purified coal gas, determine the pressurization range of the target purified coal gas according to the supply demand, and perform pressurization treatment; The pressurized target purified gas is stored and transported to the downstream process for supply.

6. A coke oven gas pretreatment system, characterized in that: The system includes: The dust removal module is used to detect the dust particle parameters of the coke oven gas, select the dust removal method based on the dust particle parameters to perform dust removal treatment, and obtain preliminary purified gas; A determination module is used to cool the preliminary purified coal gas, detect the gas composition and concentration of the cooled preliminary purified coal gas through chromatographic analysis, and determine the impurity gas separation strategy based on the detection results; A processing module, used for separating and processing the impurity gas in the preliminary purified coal gas based on the impurity gas separation strategy, and performing desulfurization processing on the separated coal gas; The storage module is used to filter impurities and remove metal components from the treated coal gas and store the gas.

7. The coke oven gas pretreatment system according to claim 6, characterized in that: The dust removal module comprises: A detection submodule, used for detecting the dust content of the coal gas through a dust sensor, configuring the working parameters of the laser scattering particle analyzer based on the dust content, and detecting the dust particle parameters of the coke oven gas using the configured laser scattering particle analyzer; The first determination submodule is used to collect gas images in a fixed space and analyze the gas images to determine the distribution and morphological characteristics of dust particles; The second determination submodule is used to determine the multi-size particle distribution of the dust in the coal gas according to the dust particle parameters and the dust particle distribution and morphological characteristics, and determine the dust removal level according to the multi-size particle distribution; The dust removal submodule is used to select a dust removal method according to the dust removal level, determine the dust removal equipment based on the dust removal method, and perform dust removal on the coke oven gas through the dust removal equipment to obtain preliminary purified gas.

8. The coke oven gas pretreatment system according to claim 6, characterized in that: The determining module comprises: The third determination submodule is used to obtain the temperature parameters of the preliminarily purified coal gas and determine the cooling method according to the temperature parameters. The cooling methods include: indirect water cooling, direct spray cooling and graded water cooling; A cooling submodule is used to determine a cooling process corresponding to a cooling method, cool the preliminary purified coal gas through the cooling process, perform chromatographic analysis on the cooled preliminary purified coal gas, and obtain analysis results; The fourth determination submodule is used to determine multiple gas components in the preliminarily purified coal gas and concentration data of each gas component according to the analysis results and the preset gas chromatography configuration scheme; The fifth determination submodule is used to determine the physical volatility properties and chemical reaction parameters of each gas component, and determine the impurity gas separation strategy for each gas according to the physical volatility properties and chemical reaction parameters and the concentration data of the gas component.

9. The coke oven gas pretreatment system according to claim 6, characterized in that: The processing module comprises: A sixth determination submodule, used to determine the processing priority index of each impurity gas through a preset decision dimension; A seventh determination submodule, configured to determine the first impurity gas with the same separation means and the second impurity gas with the single separation means based on the impurity gas separation strategy; A first processing submodule, used for prioritizing the first impurity gas and the second impurity gas according to the processing priority index of each impurity gas, and separating and processing the impurity gases in sequence based on the sorting result; The second processing submodule is used to determine the desulfurization processing volume of the coal gas, determine the absorption load according to the desulfurization processing volume, select the solvent type according to the absorption load, configure the dosage of the target type solvent based on the desulfurization accuracy, and desulfurize the separated coal gas with the target type solvent.

10. The coke oven gas pretreatment system according to claim 6, characterized in that: The storage module comprises: A first removal submodule is used to remove organic impurities such as benzene and tar from the treated coal gas and determine the multi-metal forms in the treated coal gas; The second removal submodule is used to adsorb heavy metal compounds in the coal gas through an activated carbon adsorption layer based on multi-metal forms, remove gaseous metal compounds in the coal gas through a low-temperature plasma reactor, and obtain target purified coal gas; An eighth determination submodule is used to determine the supply demand of the target purified coal gas, determine the pressurization interval of the target purified coal gas according to the supply demand, and perform pressurization processing; The storage submodule is used to store the pressurized target purified coal gas and transport it to the downstream process for supply.

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