Coke oven gas pretreatment method and system

Abstract

The present invention discloses a coke oven gas pretreatment method and system. The method comprises: detecting dust particle parameters of the coke oven gas, selecting a dust removal method based on the dust particle parameters to perform dust removal, and obtaining preliminary purified gas; cooling the preliminary purified gas, detecting the gas composition and concentration of the cooled preliminary purified gas through chromatographic analysis, and determining an impurity gas separation strategy based on the detection results; separating the impurity gases in the preliminary purified gas based on the impurity gas separation strategy, and simultaneously desulfurizing the separated gas; filtering the treated gas for impurities and removing metal components, and storing the treated gas. By intelligently selecting a dust removal method based on the distribution of dust particles in the gas, the dust removal effect can be maximized. Furthermore, 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.

Description

Technical Field

[0001] The present invention relates to the technical field of coal gas treatment, and in particular to a coke oven gas pretreatment method and system. Background Art

[0002] Coke oven gas (COG) is a byproduct of the coking process. Its primary components are hydrogen (H2, 55-65%), methane (CH4, 20-30%), and small amounts of CO and CO2. It also contains numerous impurities, such as tar, benzene, naphthalene, hydrogen sulfide (H2S), ammonia (NH3), hydrogen cyanide (HCN), and heavy metals (such as Hg, Pb, and As).23 These impurities not only corrode equipment and clog pipelines, but also affect the stable operation of subsequent processes (such as catalytic reforming and direct reduction ironmaking). Traditional methods for treating COG rely on cyclone dust removal, water scrubbing, and desulfurization. This not only creates process lock-in, but also, in large-scale, fixed systems, fails to guarantee effective dust removal and cooling, as well as the purity of the treated gas. This makes it difficult to meet high-quality gas requirements, reducing product strength, practicality, and stability. Summary of the Invention

[0003] In response to the problems shown above, the present invention provides a coke oven gas pretreatment method and system to solve the gas treatment method based on cyclone dust removal, water washing and desulfurization mentioned in the background technology. Not only is the process locked, but the large-scale system's unified fixed process 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, reducing the product strength, practicality and stability.

[0004] A coke oven gas pretreatment method comprises the following steps:

[0005] Detect the dust particle parameters of coke oven gas, select a dust removal method based on the dust particle parameters, and obtain preliminary purified gas;

[0006] Cooling the preliminarily purified gas, testing its gas composition and concentration through chromatographic analysis, and determining the impurity gas separation strategy based on the test results;

[0007] Based on the impurity gas separation strategy, the impurity gas in the primary purified coal gas is separated and treated, and the separated coal gas is desulfurized at the same time;

[0008] The treated gas is filtered for impurities and metal components and then stored.

[0009] Preferably, the detecting of 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:

[0010] The dust content of the 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 configured laser scattering particle analyzer is used to detect the dust particle parameters of the coke oven gas;

[0011] Collect gas images in a fixed space and analyze the gas images to determine the distribution and morphological characteristics of dust particles;

[0012] Determine the multi-size particle distribution of dust in coal gas based on dust particle parameters, dust particle distribution and morphological characteristics, and determine the dust removal level based on the multi-size particle distribution;

[0013] 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 dust-removed by the dust removal equipment to obtain preliminary purified gas.

[0014] Preferably, 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:

[0015] Obtain the temperature parameters of the preliminarily purified coal gas and determine the cooling method based on the temperature parameters. The cooling methods include: indirect water cooling, direct spray cooling, and graded water cooling;

[0016] 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;

[0017] Determine multiple gas components in the preliminarily purified coal gas and concentration data of each gas component based on the analysis results and a preset gas chromatography configuration plan;

[0018] 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.

[0019] Preferably, the impurity gas separation strategy is used to separate the impurity gas in the preliminarily purified coal gas, and the separated coal gas is desulfurized, including:

[0020] Determine the processing priority index of each impurity gas through preset decision dimensions;

[0021] Determining 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;

[0022] Prioritizing the first impurity gas and the second impurity gas according to the treatment priority index of each impurity gas, and separating and treating the impurity gases in sequence based on the sorting results;

[0023] Determine the gas desulfurization processing capacity, determine the absorption load based on the desulfurization processing capacity, select the solvent type based on 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.

[0024] Preferably, filtering the treated coal gas for impurities and removing metal components and storing the treated coal gas comprises:

[0025] Remove organic impurities such as benzene and tar from the treated gas and determine the polymetallic forms in the treated gas;

[0026] 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;

[0027] Determine the supply demand of the target purified gas, determine the pressurization range of the target purified gas based on the supply demand, and perform pressurization treatment;

[0028] The pressurized target purified gas is stored and transported to the downstream process for supply.

[0029] A coke oven gas pretreatment system, the system comprising:

[0030] The dust removal module is used to detect the dust particle parameters of the coke oven gas and select a dust removal method based on the dust particle parameters to obtain preliminary purified gas;

[0031] A determination module is used to cool the preliminarily purified coal gas, detect the gas composition and concentration of the cooled preliminarily purified coal gas through chromatographic analysis, and determine the impurity gas separation strategy based on the detection results;

[0032] A processing module, used to separate and process the impurity gases in the preliminarily purified coal gas based on the impurity gas separation strategy, and to desulfurize the separated coal gas;

[0033] The storage module is used to filter impurities and remove metal components from the treated coal gas and store it.

[0034] Preferably, the dust removal module includes:

[0035] a detection submodule, configured to detect the dust content of the gas through a dust sensor, configure the operating 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;

[0036] 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;

[0037] The second determination submodule is used to determine the multi-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 level according to the multi-size particle distribution;

[0038] 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 use the dust removal equipment to remove dust from the coke oven gas to obtain preliminary purified gas.

[0039] Preferably, the determining module includes:

[0040] 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;

[0041] A cooling submodule is used to determine a cooling process corresponding to a cooling method, cool the preliminarily purified coal gas through the cooling process, perform chromatographic analysis on the cooled preliminarily purified coal gas, and obtain analysis results;

[0042] a fourth determination submodule, configured to determine multiple gas components in the preliminarily purified coal gas and concentration data of each gas component based on the analysis results and a preset gas chromatography configuration scheme;

[0043] 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 based on the physical volatility properties and chemical reaction parameters and the concentration data of the gas component.

[0044] Preferably, the processing module includes:

[0045] a sixth determination submodule, configured to determine a processing priority index of each impurity gas based on a preset decision dimension;

[0046] A seventh determination submodule, 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;

[0047] a first processing submodule, configured to prioritize the first impurity gas and the second impurity gas according to a processing priority index of each impurity gas, and to sequentially separate and process the impurity gases based on the ranking result;

[0048] 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.

[0049] Preferably, the storage module includes:

[0050] The first removal submodule is used to remove organic impurities such as benzene and tar from the treated coal gas and determine the polymetallic forms in the treated coal gas;

[0051] 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, and remove gaseous metal compounds in the coal gas through a low-temperature plasma reactor to obtain target purified coal gas;

[0052] an eighth determination submodule, 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;

[0053] The storage submodule is used to store the pressurized target purified gas and transport it to the downstream process for supply.

[0054] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0055] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0057] Figure 1 A flowchart of a coke oven gas pretreatment method provided by the present invention;

[0058] Figure 2 Another working flow chart of the coke oven gas pretreatment method provided by the present invention;

[0059] Figure 3 This is a structural schematic diagram of a coke oven gas pretreatment system provided by the present invention;

[0060] Figure 4 This is a structural schematic diagram of a dust removal module in a coke oven gas pretreatment system provided by the present invention. DETAILED DESCRIPTION

[0061] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0062] Coke oven gas (COG) is a byproduct of the coking process. Its primary components are hydrogen (H2, 55-65%), methane (CH4, 20-30%), and small amounts of CO and CO2. It also contains numerous impurities, such as tar, benzene, naphthalene, hydrogen sulfide (H2S), ammonia (NH3), hydrogen cyanide (HCN), and heavy metals (such as Hg, Pb, and As). 23 These impurities not only corrode equipment and clog pipelines, but also affect the stable operation of subsequent processes (such as catalytic reforming and direct reduction ironmaking). Traditional methods for treating COG rely on cyclone dust removal, water scrubbing, and desulfurization. This not only creates process lock-in, but also, the fixed, unified process in large-scale systems cannot guarantee effective dust removal and cooling, nor the purity of the treated COG. This makes it difficult to meet high-quality COG requirements, reducing product quality, practicality, and stability. To address these issues, this embodiment discloses a method for separating COG to ensure gas purity based on dust particle detection, intelligent selection of dust removal methods, and the development of different separation strategies for different gas components.

[0063] A coke oven gas pretreatment method, such as Figure 1 As shown, the following steps are included:

[0064] Step S101: Detecting dust particle parameters of coke oven gas, selecting a dust removal method based on the dust particle parameters, and performing dust removal processing to obtain preliminary purified gas;

[0065] Step S102: Cooling the preliminarily purified coal gas, detecting the gas composition and concentration of the cooled preliminarily purified coal gas by chromatographic analysis, and determining an impurity gas separation strategy based on the detection results;

[0066] Step S103: Separate the impurity gas in the preliminarily purified coal gas based on the impurity gas separation strategy, and desulfurize the separated coal gas;

[0067] Step S104: filtering the treated coal gas for impurities and removing metal components, and then storing the gas.

[0068] The working principle of the above technical solution is as follows: 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 coal gas; cool the preliminary purified coal gas, and 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 test results; separate the impurity gas in the preliminary purified coal gas based on the impurity gas separation strategy, and desulfurize the separated coal gas at the same time; filter the impurities and remove the metal components of the treated coal gas and store it.

[0069] The beneficial effects of the above technical solution are: by intelligently selecting the dust removal method according to the distribution of dust particles in the coal gas, the dust removal effect can be maximized. At the same time, the impurity gas components in the coal gas can be accurately determined based on chromatographic analysis and an effective separation strategy can be formulated for separation, thereby ensuring the purity of the treated coal gas. Furthermore, by deep impurity filtration and metal component removal of the coal gas, the purity of the coal gas can be further guaranteed, improving the product strength, practicality and stability, and solving the problem of coal gas treatment based on cyclone dust removal, water washing and desulfurization mentioned in the prior art. Not only is the process locked, but the unified fixed process of the larger system cannot guarantee the dust removal and cooling effect and the purity of the treated coal gas, making it difficult to meet the demand for high-quality coal gas, reducing the product strength, practicality and stability.

[0070] In one embodiment, Figure 2 As shown, the method of detecting 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:

[0071] Step S201: Detecting the dust content of the gas using a dust sensor, configuring the operating parameters of a 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;

[0072] Step S202: Collect gas images in a fixed space and analyze the gas images to determine the distribution and morphological characteristics of dust particles;

[0073] Step S203: determining the multi-size particle distribution of the dust in the coal gas based on the dust particle parameters, the dust particle distribution and the morphological characteristics, and determining the dust removal level based on the multi-size particle distribution;

[0074] Step S204: selecting a dust removal method according to the dust removal level, determining dust removal equipment based on the dust removal method, and performing dust removal treatment on the coke oven gas by the dust removal equipment to obtain preliminarily purified gas.

[0075] The beneficial effect of the above technical solution is that it can perform intelligent and targeted dust removal work according to the dust distribution characteristics in a more detailed and accurate manner, thereby improving the dust removal effect.

[0076] In one embodiment, 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 based on the detection results, including:

[0077] Obtain the temperature parameters of the preliminarily purified coal gas and determine the cooling method based on the temperature parameters. The cooling methods include: indirect water cooling, direct spray cooling, and graded water cooling;

[0078] 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;

[0079] Determine multiple gas components in the preliminarily purified coal gas and concentration data of each gas component based on the analysis results and a preset gas chromatography configuration plan;

[0080] 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.

[0081] The beneficial effects of the above technical solution are: by intelligently selecting the cooling method, the best cooling effect can be guaranteed based on the real-time temperature of the coal gas, thereby avoiding the loss of coal gas and the loss of costs. Furthermore, by determining the impurity gas separation strategy for each gas based on the physical volatility properties and chemical reaction parameters, the best separation strategy can be formulated according to the characteristics of the physical and chemical reactions to ensure the separation effect and separation stability.

[0082] In this embodiment, obtaining the temperature parameters of the preliminarily purified coal gas includes:

[0083] Obtaining the outgoing calorific value parameters and the converter calorific value parameters of the preliminarily purified coal gas, and calculating the calorific value difference vector based on the outgoing calorific value parameters and the converter calorific value parameters;

[0084] Obtaining converter operation process parameters, and determining the doping ratio of air flow and gas flow in the converter process according to the converter operation process parameters and the calorific value difference vector;

[0085] Determine the gas temperature change equilibrium effect based on the doping ratio, and determine the reference temperature calculation rules and the theoretical upper and lower temperature limits of the coke oven gas based on the equilibrium effect;

[0086] Calculating a first temperature parameter of the preliminarily purified coal gas according to the converter calorific value parameter based on a reference temperature calculation rule;

[0087] confirming whether the first temperature parameter is within a numerical range between a theoretical upper temperature limit and a theoretical lower temperature limit of the coke oven gas; if so, confirming the first temperature parameter as the temperature parameter of the preliminarily purified gas;

[0088] If not, confirming the interval out-of-limit state of the first temperature parameter, wherein the interval out-of-limit state includes: a state greater than a maximum threshold value of the interval and a state less than a minimum threshold value of the interval;

[0089] If the interval over-limit state is less than the interval minimum threshold state, determine the transient temperature drop trend of the gas under the action of the converter;

[0090] A temperature correction parameter is determined according to the transient temperature drop trend, the first temperature parameter is corrected according to the temperature correction parameter, a second temperature parameter is obtained, and the second temperature parameter is confirmed as the temperature parameter of the preliminary purified coal gas.

[0091] The beneficial effects of the above technical solution are: by determining the temperature parameters by determining the air effect in the coke oven gas converter process, the accuracy and rationality of the obtained temperature parameters can be guaranteed, and they can be ensured to be within the theoretical temperature range. At the same time, the influencing factor of the temperature drop caused by the contact between gas and air can be overcome, thereby ensuring the objectivity and accuracy of the data.

[0092] In one embodiment, the impurity gas separation strategy is used to separate the impurity gas in the preliminarily purified coal gas, and the separated coal gas is desulfurized, including:

[0093] Determine the processing priority index of each impurity gas through preset decision dimensions;

[0094] Determining 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;

[0095] Prioritizing the first impurity gas and the second impurity gas according to the treatment priority index of each impurity gas, and separating and treating the impurity gases in sequence based on the sorting results;

[0096] Determine the gas desulfurization processing capacity, determine the absorption load based on the desulfurization processing capacity, select the solvent type based on 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.

[0097] The beneficial effects of the above technical solution are: through intelligent sorting, analysis can be carried out in sequence according to the urgency of separation, which improves safety while ensuring the stable progress of the separation work. Furthermore, by configuring the dosage of the target type of solvent, the desulfurization effect and accuracy can be guaranteed while also coping with the volume of coal gas desulfurization, ensuring desulfurization stability.

[0098] In one embodiment, filtering the treated coal gas for impurities and removing metal components and storing the treated coal gas comprises:

[0099] Remove organic impurities such as benzene and tar from the treated gas and determine the polymetallic forms in the treated gas;

[0100] 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;

[0101] Determine the supply demand of the target purified gas, determine the pressurization range of the target purified gas based on the supply demand, and perform pressurization treatment;

[0102] The pressurized target purified gas is stored and transported to the downstream process for supply.

[0103] The beneficial effects of the above technical solution are: by comprehensively removing metal compounds in different forms to ensure the removal effect, the purity of the coal gas is further improved. Furthermore, by pressurizing the purified coal gas, the business adaptability of the coal gas can be ensured, further improving the practicality.

[0104] In one embodiment, this embodiment also discloses a coke oven gas pretreatment system, such as Figure 3 As shown, the system includes:

[0105] The dust removal module 301 is used to detect the dust particle parameters of the coke oven gas and select a dust removal method based on the dust particle parameters to perform dust removal processing to obtain preliminary purified gas;

[0106] The determination module 302 is configured to cool the preliminarily purified coal gas, detect the gas composition and concentration of the cooled preliminarily purified coal gas through chromatographic analysis, and determine an impurity gas separation strategy based on the detection results;

[0107] The processing module 303 is used to separate the impurity gas in the preliminarily purified coal gas based on the impurity gas separation strategy, and to perform desulfurization on the separated coal gas;

[0108] The storage module 304 is used to filter impurities and remove metal components from the processed coal gas and store the processed gas.

[0109] The working principle and beneficial effects of the above technical solution have been explained in the method embodiment and will not be repeated here.

[0110] In one embodiment, Figure 4 As shown, the dust removal module 301 includes:

[0111] The detection submodule 3011 is configured to detect the dust content of the gas through a dust sensor, configure the operating parameters of the laser scattering particle analyzer based on the dust content, and detect the dust particle parameters of the coke oven gas using the configured laser scattering particle analyzer;

[0112] The first determination submodule 3012 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;

[0113] The second determination submodule 3013 is used to determine the multi-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 level according to the multi-size particle distribution;

[0114] The dust removal submodule 3014 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.

[0115] In one embodiment, the determining module includes:

[0116] 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;

[0117] A cooling submodule is used to determine a cooling process corresponding to a cooling method, cool the preliminarily purified coal gas through the cooling process, perform chromatographic analysis on the cooled preliminarily purified coal gas, and obtain analysis results;

[0118] a fourth determination submodule, configured to determine multiple gas components in the preliminarily purified coal gas and concentration data of each gas component based on the analysis results and a preset gas chromatography configuration scheme;

[0119] 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 based on the physical volatility properties and chemical reaction parameters and the concentration data of the gas component.

[0120] In one embodiment, the processing module includes:

[0121] a sixth determination submodule, configured to determine a processing priority index of each impurity gas based on a preset decision dimension;

[0122] A seventh determination submodule, 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;

[0123] a first processing submodule, configured to prioritize the first impurity gas and the second impurity gas according to a processing priority index of each impurity gas, and to sequentially separate and process the impurity gases based on the ranking result;

[0124] 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.

[0125] In one embodiment, the storage module includes:

[0126] The first removal submodule is used to remove organic impurities such as benzene and tar from the treated coal gas and determine the polymetallic forms in the treated coal gas;

[0127] 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, and remove gaseous metal compounds in the coal gas through a low-temperature plasma reactor to obtain target purified coal gas;

[0128] an eighth determination submodule, 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;

[0129] The storage submodule is used to store the pressurized target purified gas and transport it to the downstream process for supply.

[0130] Those skilled in the art should understand that the first and second in the present invention simply refer to different application stages.

[0131] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow from the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0132] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. 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, and obtain preliminary purified gas; Cooling the preliminarily purified gas, testing its gas composition and concentration through 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 primary purified coal gas is separated and treated, and the separated coal gas is desulfurized at the same time; Filter the treated coal gas for impurities and remove metal components before storing it; The detecting of dust particle parameters of the coke oven gas, selecting a dust removal method based on the dust particle parameters to perform dust removal processing, and obtaining preliminary purified gas includes: The dust content of the 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 configured laser scattering particle analyzer is used to detect the dust particle parameters of the coke oven gas; 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 based on dust particle parameters, dust particle distribution and morphological characteristics, and determine the dust removal level based on the multi-size particle distribution; Select the dust removal method based on the dust removal level, determine the dust removal equipment based on the dust removal method, and use the dust removal equipment to remove dust from the coke oven gas to obtain preliminary purified gas; The preliminary purified coal gas is cooled, the gas composition and concentration of the cooled preliminary purified coal gas is detected by chromatographic analysis, and the impurity gas separation strategy is determined based on the detection results, including: Obtain the temperature parameters of the preliminarily purified coal gas and determine the cooling method based on the temperature parameters. The cooling methods include: 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 preliminarily purified coal gas and concentration data of each gas component based on the analysis results and a preset gas chromatography configuration plan; 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.

2. The coke oven gas pretreatment method according to claim 1, characterized in that: The impurity gas separation strategy is used to separate the impurity gas in the preliminarily purified coal gas, 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 the impurity gas separation strategy; Prioritizing the first impurity gas and the second impurity gas according to the treatment priority index of each impurity gas, and separating and treating the impurity gases in sequence based on the sorting results; Determine the gas desulfurization processing capacity, determine the absorption load based on the desulfurization processing capacity, select the solvent type based on 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.

3. The coke oven gas pretreatment method according to claim 1, characterized in that: The process of filtering impurities and removing metal components from the treated coal gas and storing the treated coal gas comprises: Remove organic impurities such as benzene and tar from the treated gas and determine 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 gas, determine the pressurization range of the target purified gas based on the supply demand, and perform pressurization treatment; The pressurized target purified gas is stored and transported to the downstream process for supply.

4. 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 and select a dust removal method based on the dust particle parameters to obtain preliminary purified gas; A determination module is used to cool the preliminarily purified coal gas, detect the gas composition and concentration of the cooled preliminarily purified coal gas through chromatographic analysis, and determine the impurity gas separation strategy based on the detection results; A processing module, used to separate and process the impurity gases in the preliminarily purified coal gas based on the impurity gas separation strategy, and to desulfurize the separated coal gas; A storage module is used to filter impurities and remove metal components from the treated coal gas and store it; The dust removal module comprises: a detection submodule, configured to detect the dust content of the gas through a dust sensor, configure the operating 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; 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 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 use the dust removal equipment to remove dust from the coke oven gas to obtain preliminary purified gas; The determining module includes: 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 preliminarily purified coal gas through the cooling process, perform chromatographic analysis on the cooled preliminarily purified coal gas, and obtain analysis results; a fourth determination submodule, configured to determine multiple gas components in the preliminarily purified coal gas and concentration data of each gas component based on the analysis results and a 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 based on the physical volatility properties and chemical reaction parameters and the concentration data of the gas component.

5. The coke oven gas pretreatment system according to claim 4, characterized in that: The processing module includes: a sixth determination submodule, configured to determine a processing priority index of each impurity gas based on 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 a single separation means based on the impurity gas separation strategy; a first processing submodule, configured to prioritize the first impurity gas and the second impurity gas according to a processing priority index of each impurity gas, and to sequentially separate and process the impurity gases based on the ranking 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.

6. The coke oven gas pretreatment system according to claim 4, characterized in that: The storage module includes: The first removal submodule is used to remove organic impurities such as benzene and tar from the treated coal gas and determine the polymetallic 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, and remove gaseous metal compounds in the coal gas through a low-temperature plasma reactor to obtain target purified coal gas; an eighth determination submodule, 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; The storage submodule is used to store the pressurized target purified gas and transport it to the downstream process for supply.

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