Fault judgment and processing method and device for wet sulfuric acid process and electronic equipment

Abstract

The invention provides a fault judgment and processing method and device for a wet sulfuric acid process and electronic equipment, and the fault judgment and processing method comprises the steps: obtaining operation parameters in the wet sulfuric acid process, and presetting an operation threshold value and a fault condition of the process; comparing the operation parameter with an operation threshold value, and if the operation parameter exceeds the operation threshold value and meets a fault condition, analyzing the acid outlet concentration of the wet sulfuric acid process; and if the acid outlet concentration exceeds the standard value of the wet sulfuric acid process, outputting a fault condition corresponding to the fault condition and carrying out fault treatment on the wet sulfuric acid process. The fault judgment and processing method provided by the invention carries out fault study and judgment and fault processing on the wet sulfuric acid process, the comprehensive operation parameters and the outlet acid concentration, improves the accuracy of process fault judgment, improves the fault processing efficiency, and effectively guarantees the process operation stability, the system safety and the product quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of sulfuric acid production, and relates to a fault judgment of an acid production process, and in particular to a fault judgment and processing method, device and electronic equipment of a wet sulfuric acid process. Background Art

[0002] Sulfuric acid is an important chemical product, mainly used in fertilizer production, viscose fiber, pigment production, battery technology, metallurgical industry and refining industry. WSA wet sulfuric acid process is a modern process for producing sulfuric acid. It is used to convert sulfur-containing waste gas, such as hydrogen sulfide (H2S), into sulfuric acid through catalytic oxidation. The main process is to first react the sulfur-containing waste gas with air in a combustion furnace to generate sulfur dioxide, and then further oxidize the sulfur dioxide to sulfur trioxide under the action of a catalyst. Finally, sulfur trioxide and water vapor form sulfuric acid through direct contact. The WSA wet acid production process has the advantages of low energy consumption and high raw material utilization, short process flow, and high acid product concentration, and has become the current mainstream acid production process.

[0003] Although the WSA wet sulfuric acid process has significant advantages, in actual operation, the process equipment and systems often face a variety of fault problems. Once a fault occurs, the acid production process will be directly affected. The acid production process is a systematic process. Failures often cause equipment problems in the entire process, and the cost of equipment maintenance and replacement is high. Sulfuric acid is a strong acid, and unstable operation of the process can easily cause extremely serious safety accidents. In addition, any failure in the acid production process will ultimately affect the quality of sulfuric acid products and reduce production efficiency and benefits. Therefore, it is extremely important to adopt effective methods to monitor and judge the acid production process in a timely manner.

[0004] "Design of Sulfuric Acid Production Fault Diagnosis System" (Fan Guowei, Chemical Minerals and Processing, Issue 5, 2000) Aiming at the faults in the sulfuric acid production process, a computer-controlled fault diagnosis system is designed. Measuring sensors are installed at key locations of the sulfuric acid production line, such as the sulfur dioxide blower and boiling furnace blower, to monitor the operating status of the sulfuric acid production line. However, no effective method is given for accurately and systematically judging and processing the monitored values.

[0005] CN115159471A discloses a fault judgment method, system, equipment and medium for wet sulfuric acid production. The method presets two or more fault thresholds, compares the actual value of the operating parameter with the preset value, and outputs the corresponding fault. However, the acid production system is an integrated and systematic equipment and process, and each operating parameter has a large volatility and correlation. In actual operation, the method outputs the fault result of the acid production system through one or two monitoring parameters, which is easy to produce judgment errors and affect subsequent fault processing.

[0006] Based on the problems existing in the prior art, the present invention provides an accurate and effective fault judgment and treatment method for a wet sulfuric acid process. Summary of the invention

[0007] The purpose of the present invention is to provide a fault judgment and processing method, device and electronic equipment for a wet sulfuric acid process, which comprehensively analyzes the operating parameters and acid output concentration of the wet sulfuric acid process to conduct fault analysis, accurately analyzes the fault situation of the wet sulfuric acid process and processes it, and ensures stable operation of the process and product quality.

[0008] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a fault judgment and processing method for a wet sulfuric acid process, the fault judgment and processing method comprising:

[0010] Obtain the operating parameters of the wet sulfuric acid process and preset the operating thresholds and fault conditions of the process;

[0011] Comparing the operating parameter with an operating threshold, if the operating parameter exceeds the operating threshold to meet a fault condition, analyzing the acid output concentration of the wet sulfuric acid process;

[0012] If the acid output concentration exceeds the standard value of the wet sulfuric acid process, a fault condition corresponding to the fault condition is output and fault processing is performed on the wet sulfuric acid process.

[0013] The fault judgment and processing method provided by the present invention makes a comprehensive judgment on the process operation according to multiple operating parameters in the process. When the operating parameters meet the fault conditions, the acid output concentration of the process is further analyzed, and the fault judgment is made by combining the fault conditions and the acid output concentration. If the acid output concentration meets the standard value of the wet sulfuric acid process, the process operation is kept for observation, and no fault processing is performed. For the overall process of wet sulfuric acid, the accuracy of fault diagnosis is improved, interference or errors in single factor judgment are avoided, the stability of process operation is effectively guaranteed, the safety of the acid production system is protected, the quality of the acid output product is ensured, and the frequent adjustment of the process system causing unstable operation is avoided, thereby improving the efficiency of fault processing.

[0014] Preferably, the operating parameters include: the soft water level at the deaerator inlet drum, the acid gas flow rate at the incinerator, the incinerator temperature, the process gas temperature after the waste heat boiler, the pressure of the first catalyst packing layer of the sulfur dioxide converter, the pressure of the second catalyst packing layer of the sulfur dioxide converter, the pressure of the third catalyst packing layer of the sulfur dioxide converter, the process gas temperature after the first catalytic layer of the sulfur dioxide converter, the process gas temperature after the second catalytic layer of the sulfur dioxide converter, the condenser cooling air flow rate or the chimney exhaust gas temperature. A combination of at least two.

[0015] Preferably, the fault condition includes:

[0016] Fault condition 1: Acid gas flow rate into the incinerator > 355m 3 / h, incinerator temperature>1017℃, deaerator inlet drum soft water level>60%, waste heat boiler process gas temperature>405℃, sulfur dioxide converter first layer catalytic process gas temperature>496℃, sulfur dioxide converter second layer catalytic process gas temperature>410℃, chimney tail gas temperature>82℃.

[0017] Fault condition two: The process gas temperature after the waste heat boiler is <405℃, the process gas temperature after the second-layer catalyst of the sulfur dioxide converter is <410℃, and the exhaust gas temperature to the chimney is <82℃.

[0018] Fault condition three: deaerator inlet drum soft water level>60%, cooler cooling air flow>6100m 3 / h, the process gas temperature after the first layer of catalysis in the sulfur dioxide converter is <496℃, and the tail gas temperature going to the chimney is <82℃.

[0019] Fault condition four: The soft water level at the deaerator drum inlet is >60%, the pressure of the second-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, the process gas temperature after the second-layer catalyst of the sulfur dioxide converter is <410℃, and the exhaust gas temperature to the chimney is <82℃.

[0020] Fault condition five: The soft water level at the deaerator drum inlet is >60%, the pressure of the three-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, and the exhaust gas temperature to the chimney is <82℃.

[0021] Preferably, the fault condition includes:

[0022] When fault condition one is met and the sulfuric acid concentration is >98.3%, it is judged that the acid gas hydrogen sulfide concentration is too high.

[0023] When fault condition 2 is met and the sulfuric acid concentration is <98.3%, it is judged that the waste heat boiler is leaking.

[0024] When fault condition three is met and the sulfuric acid concentration is <98.3%, it is judged that the inter-bed cooler of one layer is leaking.

[0025] When fault condition four is met and the sulfuric acid concentration is <98.3%, it is judged that the second-layer bed intercooler is leaking.

[0026] When fault condition five is met and the sulfuric acid concentration is <98.3%, it is determined that the process gas cooler is leaking.

[0027] Preferably, the fault handling includes:

[0028] If the fault is judged to be a high concentration of hydrogen sulfide in the acid gas, the upstream coke oven gas desulfurization process parameters of the wet sulfuric acid process are adjusted to a concentration of hydrogen sulfide in the acid gas of ≤0.2g / m 3 .

[0029] If the fault is determined to be a leak in the waste heat boiler or cooler, the wet sulfuric acid process will be shut down.

[0030] Preferably, the upstream coke oven gas desulfurization process parameters include: any one or a combination of at least two of the desorption tower lean liquid flow, the desulfurization tower rich liquid flow, the desulfurization tower alkali liquid flow, the desulfurization tower discharge, the desulfurization tower rich liquid discharge or the desorption tower reboiler steam flow.

[0031] Preferably, the wet sulfuric acid process comprises:

[0032] Deaerator, steam drum, incinerator, waste heat boiler, ammonia catalytic reduction converter, sulfur dioxide converter, condenser, acid intermediate tank, acid cooler and chimney.

[0033] The deaerator is connected to a steam drum, and a circulation pipeline is connected between the steam drum, the waste heat boiler and the sulfur dioxide converter.

[0034] The incinerator, waste heat boiler, ammonia catalytic reduction converter, sulfur dioxide converter, condenser, acid intermediate tank and acid cooler are connected in sequence, and the chimney is connected to the condenser.

[0035] Preferably, the sulfur dioxide converter is provided with one catalyst packing layer, one inter-bed cooler, two catalyst packing layers, two inter-bed coolers, three catalyst packing layers and a process gas cooler.

[0036] In a second aspect, the present invention provides a fault judgment and processing device for a wet sulfuric acid process, the fault judgment and processing device comprising:

[0037] An operating parameter acquisition module is used to obtain actual operating parameters in the wet sulfuric acid process;

[0038] A fault judgment module stores preset operating thresholds and fault conditions, and is used to compare the acquired operating parameters with the operating thresholds to judge the fault conditions;

[0039] Acid concentration analysis module, used to detect the acid concentration of wet sulfuric acid process;

[0040] The fault handling module is used to output the fault situation and execute the fault handling plan according to the fault condition and acid concentration analysis.

[0041] In a third aspect, the present invention provides an electronic device, the electronic device comprising:

[0042] at least one processor; and

[0043] a memory communicatively connected to the at least one processor; wherein,

[0044] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the fault judgment and processing method of the wet sulfuric acid process described in the first aspect.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] The fault judgment and processing method provided by the present invention is aimed at the wet sulfuric acid process, and comprehensively analyzes and processes the faults based on the operating parameters and the acid output concentration, thereby improving the accuracy of process fault judgment, improving the efficiency of fault processing, and effectively ensuring the process operation stability, system safety and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a flow chart of the fault judgment and treatment method of the wet sulfuric acid process provided in Example 1;

[0048] Figure 2 It is a schematic structural diagram of an acid production system of a wet sulfuric acid process provided in Example 1;

[0049] Among them: 1, deaerator; 2, boiler feed pump; 3, steam drum; 4, incinerator; 5, waste heat boiler; 6, ammonia catalytic reduction converter; 7, sulfur dioxide converter; 8, condenser; 9, acid intermediate tank; 10, acid cooler; 11, chimney; 71, first catalyst packing layer; 72, first inter-bed cooler; 73, second catalyst packing layer; 74, second inter-bed cooler; 75, third catalyst packing layer; 76, process gas cooler; A1-A16, monitoring points;

[0050] Figure 3 It is a structural schematic diagram of a desulfurization system of a coke oven gas desulfurization process provided in Example 1;

[0051] Among them: 31, desulfurization tower; 32, analysis tower; 33, rich liquid tank; 34, reboiler; 311, alkali liquid pipeline; 312, coke oven gas inlet pipeline; 313, coke oven gas outlet pipeline; 314, analysis tower lean liquid pipeline; 315, desulfurization tower rich liquid pipeline; 316, sewage pipeline; 321, acid gas pipeline to downstream wet sulfuric acid process; 341, reboiler steam pipeline;

[0052] Figure 4 It is a structural schematic diagram of a fault judgment and treatment device for a wet sulfuric acid process provided in Example 3;

[0053] Figure 5 It is a schematic diagram of the structure of an electronic device for implementing a fault judgment and processing method for a wet sulfuric acid process provided in Example 4. DETAILED DESCRIPTION

[0054] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0055] Example 1

[0056] This embodiment provides a Figure 1 The fault judgment and treatment method of the wet sulfuric acid process shown in the figure includes:

[0057] (1) Obtain the operating parameters of the wet sulfuric acid process and preset the operating thresholds and fault conditions of the process.

[0058] Specifically, (1.1) a monitoring point for operating parameters is set in the acid production system of the wet sulfuric acid process to obtain the operating parameters.

[0059] like Figure 2 As shown, the acid-making system of the wet sulfuric acid process includes:

[0060] Deaerator 1, boiler feed pump 2, steam drum 3, incinerator 4, waste heat boiler 5, ammonia catalytic reduction converter 6, sulfur dioxide converter 7, condenser 8, acid intermediate tank 9, acid cooler 10 and chimney 11.

[0061] In the sulfur dioxide converter 7, a catalyst packing layer 71, a bed intercooler 72, a catalyst packing layer 73, a bed intercooler 74, a catalyst packing layer 75 and a process gas cooler 76 are sequentially arranged.

[0062] The incinerator 4, the waste heat boiler 5, the ammonia catalytic reduction converter 6, the sulfur dioxide converter 7, the condenser 8, the acid intermediate tank 9 and the acid cooler 10 are connected in sequence.

[0063] The inlet of the deaerator tank 1 is connected with a soft water pipeline and a steam pipeline, and the deaerator tank 1 is connected with the steam drum 3 through the soft water pipeline.

[0064] A boiler feed water return pipeline is connected between the boiler feed water pump 2 and the deaerator tank 1 .

[0065] A steam drum self-circulation pipeline to the waste heat boiler and a waste heat boiler self-circulation pipeline back to the steam drum are connected between the steam drum 3 and the waste heat boiler 5 .

[0066] A steam drum self-circulation pipeline to the process gas cooler and a process gas cooler self-circulation pipeline back to the steam drum are connected between the steam drum 3 and the process gas cooler 76 .

[0067] A heat exchange steam pipeline for entering the inter-bed cooler is connected between the steam drum 3 and the inter-bed cooler 74 .

[0068] The incinerator 4 is respectively provided with an acid gas inlet pipeline, a coke oven gas inlet pipeline and an air inlet pipeline.

[0069] Ammonia and air gas pipelines are passed through the process gas pipeline connected between the waste heat boiler 5 and the ammonia catalytic reduction converter 6 .

[0070] A heat exchange steam pipeline is connected between the first-layer inter-bed cooler 72 and the second-layer inter-bed cooler 74 .

[0071] The condenser 8 is connected to the chimney 11 through an exhaust gas pipeline.

[0072] The monitoring sites of the operating parameters in the acid-making system include:

[0073] Soft water level at the deaerator drum inlet A1, boiler feed pump frequency A2, acid gas flow rate at the incinerator A3, coal gas flow rate at the incinerator A4, combustion air flow rate at the incinerator A5, incinerator temperature A6, process gas temperature after the waste heat boiler A7, pressure of the first catalyst packing layer of the sulfur dioxide converter A8, process gas temperature after the first catalyst layer of the sulfur dioxide converter A9, pressure of the second catalyst packing layer of the sulfur dioxide converter A10, process gas temperature after the second catalyst layer of the sulfur dioxide converter A11, pressure of the third catalyst packing layer of the sulfur dioxide converter A12, process gas temperature entering the condenser A13, condenser cooling air flow A14, exhaust gas temperature to the chimney A15.

[0074] (1.2) Preset the normal operating threshold of the wet sulfuric acid process.

[0075] The normal operating thresholds of the acid production system of the wet sulfuric acid process are: the soft water level of the deaerator inlet drum is 60%, the boiler feed pump frequency is 90%, and the acid gas flow rate of the incinerator is 355m 3 / h, the gas flow rate into the incinerator is 49m 3 / h, the incinerator combustion air flow rate is 4930m 3 / h, the incinerator temperature is 1017℃, the process gas temperature after the waste heat boiler is 405℃, the pressure of the first catalyst packing layer of the sulfur dioxide converter is 2.64kPa, the process gas temperature after the first catalyst of the sulfur dioxide converter is 496℃, the pressure of the second catalyst packing layer of the sulfur dioxide converter is 2.64kPa, the process gas temperature after the second catalyst of the sulfur dioxide converter is 410℃, the pressure of the third catalyst packing layer of the sulfur dioxide converter is 2.64kPa, the process gas temperature entering the condenser is 280℃, and the cooling air flow rate of the condenser is 6100m 3 / h, the exhaust gas temperature going to the chimney is 82℃.

[0076] (1.3) Preset fault conditions of wet sulfuric acid process.

[0077] The fault conditions include:

[0078] Fault condition 1: Acid gas flow rate into the incinerator > 355m 3 / h, incinerator temperature>1017℃, deaerator inlet drum soft water level>60%, waste heat boiler process gas temperature>405℃, sulfur dioxide converter first layer catalytic process gas temperature>496℃, sulfur dioxide converter second layer catalytic process gas temperature>410℃, chimney tail gas temperature>82℃.

[0079] Fault condition two: The process gas temperature after the waste heat boiler is <405℃, the process gas temperature after the second-layer catalyst of the sulfur dioxide converter is <410℃, and the exhaust gas temperature to the chimney is <82℃.

[0080] Fault condition three: deaerator inlet drum soft water level>60%, cooler cooling air flow>6100m 3 / h, the process gas temperature after the first layer of catalysis in the sulfur dioxide converter is <496℃, and the tail gas temperature going to the chimney is <82℃.

[0081] Fault condition four: The soft water level at the deaerator drum inlet is >60%, the pressure of the second-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, the process gas temperature after the second-layer catalyst of the sulfur dioxide converter is <410℃, and the exhaust gas temperature to the chimney is <82℃.

[0082] Fault condition five: The soft water level at the deaerator drum inlet is >60%, the pressure of the three-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, and the exhaust gas temperature to the chimney is <82℃.

[0083] (2) comparing the operating parameters with a normal operating threshold value; if the operating parameters exceed the normal operating threshold value and meet a fault condition, analyzing the acid output concentration of the wet sulfuric acid process.

[0084] like Figure 2As shown, an online acid concentration meter A16 is provided on the acid outlet pipeline after the acid cooler of the acid production system.

[0085] (3) If the acid output concentration exceeds the standard value of the wet sulfuric acid process, a fault condition corresponding to the fault condition is output and the wet sulfuric acid process is fault-handled.

[0086] Specifically, the fault conditions described in (3.1) include:

[0087] When fault condition one is met and the sulfuric acid concentration is >98.3%, it is judged that the acid gas hydrogen sulfide concentration is too high.

[0088] When fault condition 2 is met and the sulfuric acid concentration is <98.3%, it is judged that the waste heat boiler is leaking.

[0089] When fault condition three is met and the sulfuric acid concentration is <98.3%, it is judged that the inter-bed cooler of one layer is leaking.

[0090] When fault condition four is met and the sulfuric acid concentration is <98.3%, it is judged that the second-layer bed intercooler is leaking.

[0091] When fault condition five is met and the sulfuric acid concentration is <98.3%, it is determined that the process gas cooler is leaking.

[0092] (3.2) Perform troubleshooting on the fault situation.

[0093] When the fault is judged to be a high concentration of hydrogen sulfide in the acid gas, adjust the upstream coke oven gas desulfurization process parameters of the wet sulfuric acid process to a concentration of hydrogen sulfide in the acid gas of ≤0.2g / m 3 .

[0094] Specifically, Figure 3 As shown, the desulfurization system of the upstream coke oven gas desulfurization process includes:

[0095] Desulfurization tower 31 , analysis tower 32 , rich liquid tank 33 and reboiler 34 .

[0096] The desulfurization tower 31 is connected to an alkali solution pipeline 311 , a coke oven gas inlet pipeline 312 , and a coke oven gas outlet pipeline 313 .

[0097] A desulfurization tower lean liquid pipeline 314 and a desulfurization tower rich liquid pipeline 315 are connected between the desulfurization tower 31 and the desulfurization tower 32 .

[0098] The analytical tower 32 is connected to an acid gas pipeline 321 to a downstream wet sulfuric acid process.

[0099] The reboiler 34 is provided with a reboiler steam pipeline 341 .

[0100] The desulfurization tower 31 and the rich liquid tank 33 are both connected to a sewage discharge pipeline 316 .

[0101] The upstream coke oven gas desulfurization process parameters for regulating the wet sulfuric acid process include: any one or a combination of at least two of the lean liquid flow rate of the desulfurization tower, the rich liquid flow rate of the desulfurization tower, the alkali solution concentration of the desulfurization tower, the sewage discharge of the desulfurization tower, the rich liquid sewage discharge of the desulfurization tower or the steam flow rate of the reboiler of the desulfurization tower.

[0102] The specific operation process includes: increasing the lean liquid flow rate of the desulfurization tower and / or the rich liquid flow rate of the desulfurization tower by 2 cubic meters each time, and the alkaline liquid flow rate of the desulfurization tower by 0.1m 3 / h, desulfurization tower discharge and / or desulfurization tower rich liquid discharge 0.1m 3 / h, the steam flow rate of the analytical tower reboiler is 0.2t / h, and the concentration of hydrogen sulfide in the acid gas of the wet sulfuric acid removal process in the coke oven gas desulfurization process is ≤0.2g / m 3 , stop regulating.

[0103] When the fault is determined to be a leakage in the waste heat boiler, a leakage in the first-layer inter-bed cooler, a leakage in the second-layer inter-bed cooler, or a leakage in the process gas cooler, the wet sulfuric acid process is shut down.

[0104] Example 2

[0105] This embodiment provides a fault judgment and processing method for a wet sulfuric acid process. Based on the fault judgment and processing method provided in Example 1, the technical solution of the present invention is specifically described.

[0106] The fault judgment and processing method includes:

[0107] The normal operating thresholds of the acid production system of the wet sulfuric acid process are: the soft water level of the deaerator inlet drum is 60%, the boiler feed pump frequency is 90%, and the acid gas flow rate of the incinerator is 355m 3 / h, the gas flow rate into the incinerator is 49m 3 / h, the incinerator combustion air flow rate is 4930m 3 / h, the incinerator temperature is 1017℃, the process gas temperature after the waste heat boiler is 405℃, the pressure of the first catalyst packing layer of the sulfur dioxide converter is 2.64kPa, the process gas temperature after the first catalyst of the sulfur dioxide converter is 496℃, the pressure of the second catalyst packing layer of the sulfur dioxide converter is 2.64kPa, the process gas temperature after the second catalyst of the sulfur dioxide converter is 410℃, the pressure of the third catalyst packing layer of the sulfur dioxide converter is 2.64kPa, the process gas temperature entering the condenser is 280℃, and the cooling air flow rate of the condenser is 6100m 3 / h, the exhaust gas temperature going to the chimney is 82℃.

[0108] Case 1:

[0109] The operating parameters of the wet sulfuric acid process are obtained and compared with the normal operating thresholds:

[0110] The soft water level of the deaerator inlet drum increases, the frequency of the boiler feed pump remains unchanged, the acid gas flow rate into the incinerator increases, the coal gas flow rate into the incinerator remains unchanged, the combustion air flow rate into the incinerator remains unchanged, the incinerator temperature increases, the process gas temperature after the waste heat boiler increases, the pressure of the first catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the first catalytic layer of the sulfur dioxide converter increases, the pressure of the second catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the second catalytic layer of the sulfur dioxide converter increases, the pressure of the third catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature entering the condenser remains unchanged, the condenser cooling air flow remains unchanged, and the exhaust gas temperature going to the chimney increases.

[0111] The fault conditions were met and the acid concentration of the wet sulfuric acid process was analyzed. The analysis result was: greater than the standard value of 98.3%.

[0112] The output fault condition is: the concentration of acid gas hydrogen sulfide is too high.

[0113] And troubleshooting: adjust the upstream coke oven gas desulfurization process parameters, increase the lean liquid flow of the desulfurization tower and / or the rich liquid flow of the desulfurization tower by 2 cubic meters each time, and the alkaline liquid flow of the desulfurization tower by 0.1m 3 / h, desulfurization tower discharge and / or desulfurization tower rich liquid discharge 0.1m 3 / h, the steam flow rate of the analytical tower reboiler is 0.2t / h, and the concentration of hydrogen sulfide in the acid gas of the wet sulfuric acid removal process in the coke oven gas desulfurization process is ≤0.2g / m 3 , stop regulating.

[0114] Case 2:

[0115] The operating parameters of the wet sulfuric acid process are obtained and compared with the normal operating thresholds:

[0116] The soft water level of the deaerator inlet drum increases, the frequency of the boiler feed water pump remains unchanged, the acid gas flow rate into the incinerator remains unchanged, the coal gas flow rate into the incinerator remains unchanged, the combustion air flow rate into the incinerator remains unchanged, the temperature of the incinerator remains unchanged, the temperature of the process gas after the waste heat boiler decreases, the pressure of the first catalyst packing layer of the sulfur dioxide converter increases, the temperature of the process gas after the first catalytic layer of the sulfur dioxide converter decreases, the pressure of the second catalyst packing layer of the sulfur dioxide converter remains unchanged, the temperature of the process gas after the second catalytic layer of the sulfur dioxide converter decreases, the pressure of the third catalyst packing layer of the sulfur dioxide converter remains unchanged, the temperature of the process gas entering the condenser remains unchanged, the cooling air flow of the condenser remains unchanged, and the temperature of the exhaust gas going to the chimney decreases.

[0117] The fault conditions were met and the acid concentration of the wet sulfuric acid process was analyzed. The analysis result was: less than the standard value of 98.3%.

[0118] The output fault condition is: leakage in the waste heat boiler.

[0119] And carry out troubleshooting: shut down the acid production system of the wet sulfuric acid process.

[0120] Case 3:

[0121] The operating parameters of the wet sulfuric acid process are obtained and compared with the normal operating thresholds:

[0122] The soft water level of the deaerator inlet drum increases, the frequency of the boiler feed water pump remains unchanged, the acid gas flow rate into the incinerator remains unchanged, the coal gas flow rate into the incinerator remains unchanged, the combustion air flow rate into the incinerator remains unchanged, the incinerator temperature remains unchanged, the process gas temperature after the waste heat boiler remains unchanged, the pressure of the first catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the first catalytic layer of the sulfur dioxide converter decreases, the pressure of the second catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the second catalytic layer of the sulfur dioxide converter remains unchanged, the pressure of the third catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature entering the condenser remains unchanged, the condenser cooling air flow rate increases, and the exhaust gas temperature going to the chimney decreases.

[0123] The fault conditions were met and the acid concentration of the wet sulfuric acid process was analyzed. The analysis result was: less than the standard value of 98.3%.

[0124] The output fault condition is: one layer of inter-bed cooler is leaking.

[0125] And carry out troubleshooting: shut down the acid production system of the wet sulfuric acid process.

[0126] Case 4:

[0127] The soft water level of the deaerator inlet drum increases, the frequency of the boiler feed water pump remains unchanged, the acid gas flow rate into the incinerator remains unchanged, the coal gas flow rate into the incinerator remains unchanged, the combustion air flow rate into the incinerator remains unchanged, the incinerator temperature remains unchanged, the process gas temperature after the waste heat boiler remains unchanged, the pressure of the first catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the first catalytic layer of the sulfur dioxide converter remains unchanged, the pressure of the second catalyst packing layer of the sulfur dioxide converter increases, the process gas temperature after the second catalytic layer of the sulfur dioxide converter decreases, the pressure of the third catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature entering the condenser remains unchanged, the condenser cooling air flow remains unchanged, and the exhaust gas temperature going to the chimney decreases.

[0128] The fault conditions were met and the acid concentration of the wet sulfuric acid process was analyzed. The analysis result was: less than the standard value of 98.3%.

[0129] The output fault condition is: the cooler between the second-layer beds is leaking.

[0130] And carry out troubleshooting: shut down the acid production system of the wet sulfuric acid process.

[0131] Case 5:

[0132] The operating parameters of the wet sulfuric acid process are obtained and compared with the normal operating thresholds:

[0133] The soft water level of the deaerator inlet drum increases, the frequency of the boiler feed water pump remains unchanged, the acid gas flow rate into the incinerator remains unchanged, the coal gas flow rate into the incinerator remains unchanged, the combustion air flow rate into the incinerator remains unchanged, the incinerator temperature remains unchanged, the process gas temperature after the waste heat boiler remains unchanged, the pressure of the first catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the first catalytic layer of the sulfur dioxide converter remains unchanged, the pressure of the second catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the second catalytic layer of the sulfur dioxide converter remains unchanged, the pressure of the third catalyst packing layer of the sulfur dioxide converter increases, the process gas temperature entering the condenser remains unchanged, the condenser cooling air flow remains unchanged, and the exhaust gas temperature going to the chimney decreases.

[0134] The fault conditions were met and the acid concentration of the wet sulfuric acid process was analyzed. The analysis result was: less than the standard value of 98.3%.

[0135] The output fault condition is: process gas cooler leaks.

[0136] And carry out troubleshooting: shut down the acid production system of the wet sulfuric acid process.

[0137] Case 6:

[0138] The operating parameters of the wet sulfuric acid process are obtained and compared with the normal operating thresholds:

[0139] The soft water level of the deaerator inlet drum increases, the frequency of the boiler feed pump remains unchanged, the acid gas flow rate into the incinerator remains unchanged, the coal gas flow rate into the incinerator remains unchanged, the combustion air flow rate into the incinerator remains unchanged, the incinerator temperature remains unchanged, the process gas temperature after the waste heat boiler remains unchanged, the pressure of the first catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the first catalytic layer of the sulfur dioxide converter remains unchanged, the pressure of the second catalyst packing layer of the sulfur dioxide converter remains unchanged, the process gas temperature after the second catalytic layer of the sulfur dioxide converter remains unchanged, the pressure of the third catalyst packing layer of the sulfur dioxide converter increases, the process gas temperature entering the condenser decreases, the condenser cooling air flow rate remains unchanged, and the exhaust gas temperature going to the chimney decreases.

[0140] The fault conditions were met and the acid concentration of the wet sulfuric acid process was analyzed. The analysis result was: less than the standard value of 98.3%.

[0141] The output fault condition is: process gas cooler leaks.

[0142] And carry out troubleshooting: shut down the acid production system of the wet sulfuric acid process.

[0143] Example 3

[0144] This embodiment provides a fault judgment and processing device for a wet sulfuric acid process, such as Figure 4 As shown, the fault judgment and processing device includes: an operation parameter acquisition module 110, a fault judgment module 120, an acid concentration analysis module 130 and a fault processing module 140. Among them:

[0145] The operating parameter acquisition module 110 is used to obtain actual operating parameters in the wet sulfuric acid process.

[0146] The fault judgment module 120 stores preset operating thresholds and fault conditions, and is used to compare the acquired operating parameters with the operating thresholds to judge the fault conditions.

[0147] The acid concentration analysis module 130 is used to detect the acid concentration of the wet sulfuric acid process.

[0148] The fault processing module 140 is used to output the fault situation and perform fault processing according to the fault condition and acid concentration analysis.

[0149] In the fault judgment module 120, the fault conditions include:

[0150] Fault condition 1: Acid gas flow rate into the incinerator > 355m 3 / h, incinerator temperature>1017℃, deaerator inlet drum soft water level>60%, waste heat boiler process gas temperature>405℃, sulfur dioxide converter first layer catalytic process gas temperature>496℃, sulfur dioxide converter second layer catalytic process gas temperature>410℃, chimney tail gas temperature>82℃.

[0151] Fault condition two: The process gas temperature after the waste heat boiler is <405℃, the process gas temperature after the second-layer catalyst of the sulfur dioxide converter is <410℃, and the exhaust gas temperature to the chimney is <82℃.

[0152] Fault condition three: deaerator inlet drum soft water level>60%, cooler cooling air flow>6100m 3 / h, the process gas temperature after the first layer of catalysis in the sulfur dioxide converter is <496℃, and the tail gas temperature going to the chimney is <82℃.

[0153] Fault condition four: The soft water level at the deaerator drum inlet is >60%, the pressure of the second-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, the process gas temperature after the second-layer catalyst of the sulfur dioxide converter is <410℃, and the exhaust gas temperature to the chimney is <82℃.

[0154] Fault condition five: The soft water level at the deaerator drum inlet is >60%, the pressure of the three-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, and the exhaust gas temperature to the chimney is <82℃.

[0155] In the fault processing module 140 , according to the analysis results of the fault judgment module 120 and the acid concentration analysis module 130 , the fault condition of the wet sulfuric acid process is output and a fault processing operation is performed.

[0156] The specific fault conditions of the wet sulfuric acid process include: high concentration of hydrogen sulfide in the acid gas, leakage of the waste heat boiler, leakage of the first-layer interbed cooler, leakage of the second-layer interbed cooler or leakage of the process gas cooler.

[0157] The fault handling operation specifically includes: regulating the acid gas hydrogen sulfide concentration or shutting down the wet sulfuric acid process. The device provided in this embodiment can execute the fault judgment and handling method of the wet sulfuric acid process provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0158] Example 4

[0159] This embodiment provides an electronic device for implementing a fault judgment and processing method for a wet sulfuric acid process, such as Figure 5 As shown, the electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0160] like Figure 5 As shown, the electronic device 50 includes at least one processor 51, and a memory connected to the at least one processor 51 in communication, such as a read-only memory (ROM) 52, a random access memory (RAM) 53, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 51 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 52 or the computer program loaded from the storage unit 58 to the random access memory (RAM) 53. In the RAM 53, various programs and data required for the operation of the electronic device 50 can also be stored. The processor 51, the ROM 52, and the RAM 53 are connected to each other via a bus 54. An input / output (I / O) interface 55 is also connected to the bus 54.

[0161] A number of components in the electronic device 50 are connected to the I / O interface 55, including: an input unit 56, such as a keyboard, a mouse, etc.; an output unit 57, such as various types of displays, speakers, etc.; a storage unit 58, such as a second storage area, an optical disk, etc.; and a communication unit 59, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 59 allows the electronic device 50 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0162] The processor 51 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 51 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 51 executes the various methods and processes described above, such as the fault judgment and processing method of the wet sulfuric acid process.

[0163] In some embodiments, the fault judgment and processing method of the wet sulfuric acid process can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 58. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 50 via the ROM 52 and / or the communication unit 59. When the computer program is loaded into the RAM 53 and executed by the processor 51, one or more steps of the fault judgment and processing method of the wet sulfuric acid process described above can be performed. Alternatively, in other embodiments, the processor 51 can be configured to execute the fault judgment and processing method of the wet sulfuric acid process by any other appropriate means (for example, by means of firmware).

[0164] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0165] Computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable target determination device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0166] In the context of the present application, a computer readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device or equipment. A computer readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer readable storage medium may be a machine readable signal medium. A more specific example of a machine readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0167] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0168] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0169] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0170] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the information expected by the technical solution of this application can be achieved, and this document is not limited here.

[0171] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for fault judgment and treatment of a wet sulfuric acid process, characterized in that: The fault judgment and processing method includes: Obtain the operating parameters of the wet sulfuric acid process and preset the operating thresholds and fault conditions of the process; The operating parameter is compared with the operating threshold, and if the operating parameter exceeds the operating threshold to meet the fault condition, the acid concentration of the wet sulfuric acid process is analyzed; If the acid output concentration exceeds the standard value of the wet sulfuric acid process, a fault condition corresponding to the fault condition is output and fault processing is performed on the wet sulfuric acid process.

2. The fault diagnosis and processing method according to claim 1, characterized in that: The operating parameters include: a soft water level at the deaerator drum inlet, an acid gas flow rate at the incinerator, an incinerator temperature, a waste heat boiler post-process gas temperature, a first-layer catalyst packing layer pressure of a sulfur dioxide converter, a second-layer catalyst packing layer pressure of a sulfur dioxide converter, a third-layer catalyst packing layer pressure of a sulfur dioxide converter, a first-layer catalytic post-process gas temperature of a sulfur dioxide converter, a second-layer catalytic post-process gas temperature of a sulfur dioxide converter, a condenser cooling air flow rate, or a combination of at least two of the chimney tail gas temperature.

3. The fault diagnosis and processing method according to claim 1 or 2, characterized in that: The fault conditions include: Fault condition 1: Acid gas flow rate into the incinerator > 355m 3 / h, incinerator temperature>1017℃, deaerator drum soft water level>60%, waste heat boiler process gas temperature>405℃, sulfur dioxide converter first layer catalytic process gas temperature>496℃, sulfur dioxide converter second layer catalytic process gas temperature>410℃, chimney tail gas temperature>82℃; Fault condition 2: The process gas temperature after the waste heat boiler is less than 405°C, the process gas temperature after the second-layer catalysis of the sulfur dioxide converter is less than 410°C, and the tail gas temperature to the chimney is less than 82°C; Fault condition three: deaerator inlet drum soft water level>60%, cooler cooling air flow>6100m 3 / h, the process gas temperature after the first layer of catalysis in the sulfur dioxide converter is less than 496℃, and the tail gas temperature to the chimney is less than 82℃; Fault condition 4: The soft water level of the deaerator drum is >60%, the pressure of the second-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, the process gas temperature after the second-layer catalyst of the sulfur dioxide converter is <410℃, and the tail gas temperature to the chimney is <82℃; Fault condition five: The soft water level at the deaerator drum inlet is >60%, the pressure of the three-layer catalyst packing layer of the sulfur dioxide converter is >2.64kPa, and the exhaust gas temperature to the chimney is <82℃.

4. The fault diagnosis and processing method according to claim 3, characterized in that: The fault conditions include: When fault condition 1 is met and the sulfuric acid concentration is >98.3%, it is judged that the acid gas hydrogen sulfide concentration is too high; When fault condition 2 is met and the sulfuric acid concentration is less than 98.3%, it is judged that the waste heat boiler is leaking; When fault condition three is met and the sulfuric acid concentration is less than 98.3%, it is judged that the inter-bed cooler of one layer is leaking; When fault condition 4 is met and the sulfuric acid concentration is less than 98.3%, it is judged that the inter-bed cooler of the second layer is leaking; When fault condition five is met and the sulfuric acid concentration is <98.3%, it is determined that the process gas cooler is leaking.

5. The fault diagnosis and processing method according to claim 4, characterized in that: The fault handling includes: If the fault is judged to be a high concentration of hydrogen sulfide in the acid gas, the upstream coke oven gas desulfurization process parameters of the wet sulfuric acid process are adjusted to a concentration of hydrogen sulfide in the acid gas of ≤0.2g / m 3 ; If the fault is determined to be a leak in the waste heat boiler or cooler, the wet sulfuric acid process will be shut down.

6. The fault diagnosis and processing method according to claim 5, characterized in that: The upstream coke oven gas desulfurization process parameters include: any one or a combination of at least two of the desorption tower lean liquid flow, desulfurization tower rich liquid flow, desulfurization tower alkali liquid flow, desulfurization tower discharge, desulfurization tower rich liquid discharge or desorption tower reboiler steam flow.

7. The fault diagnosis and processing method according to any one of claims 1 to 6, characterized in that: The wet sulfuric acid process comprises: Deaerator, steam drum, incinerator, waste heat boiler, ammonia catalytic reduction converter, sulfur dioxide converter, condenser, acid intermediate tank, acid cooler and chimney; The deaerator tank is connected to a steam drum, and the steam drum is respectively connected to a waste heat boiler and a sulfur dioxide converter via a circulation pipeline; The incinerator, waste heat boiler, ammonia catalytic reduction converter, sulfur dioxide converter, condenser, acid intermediate tank and acid cooler are connected in sequence, and the chimney is connected to the condenser.

8. The fault diagnosis and processing method according to claim 7, characterized in that: The sulfur dioxide converter is provided with a catalyst packing layer, a bed intercooler, a second catalyst packing layer, a second bed intercooler, a third catalyst packing layer and a process gas cooler.

9. A fault judgment and treatment device for a wet sulfuric acid process, characterized in that: The fault judgment and processing device comprises: An operating parameter acquisition module is used to obtain actual operating parameters in the wet sulfuric acid process; A fault judgment module stores preset operating thresholds and fault conditions, and is used to compare the acquired operating parameters with the operating thresholds to judge the fault conditions; Acid concentration analysis module, used to detect the acid concentration of wet sulfuric acid process; The fault handling module is used to output the fault situation and execute the fault handling plan according to the fault condition and acid concentration analysis.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the fault judgment and processing method for the wet sulfuric acid process according to any one of claims 1 to 8.

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