An online monitoring and alarm system for tail gas in a chemical plant

Abstract

The present invention belongs to the technical field of video conference data protection, and relates to an online monitoring and alarm system for tail gas of a chemical plant. The present invention avoids unnecessary environmental pollution by analyzing the cooling effect evaluation coefficient of the tail gas of the target chemical plant, and is beneficial to protecting the ecological environment. By analyzing the removal effect evaluation coefficient of solid particulate matter, acidic gas and organic gas of the tail gas of the target chemical plant, the removal effect evaluation of solid particulate matter, acidic gas and organic gas of the tail gas of the target chemical plant is obtained, which is beneficial to help the target chemical plant discover abnormal phenomena in the treatment process of the tail gas of the chemical plant, so as to solve them in time. By alarming the removal steps of each component of the tail gas of the target chemical plant whose removal effect is evaluated as unqualified, the leakage of flammable, explosive and toxic gases contained in the tail gas of the chemical plant is avoided, and the occurrence of poisoning, fire and even explosion accidents is avoided, thereby ensuring the safety of people's lives and property.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical plant tail gas safety monitoring, and relates to an online monitoring and alarm system for chemical plant tail gas. Background Art

[0002] Chemical plant tail gas refers to the waste gas discharged by chemical enterprises during the production process. These waste gases often contain a variety of toxic and harmful substances, such as hydrogen sulfide, ammonia, chlorine, sulfur dioxide, nitrogen oxides, etc. These substances are very harmful to the environment and human health. Therefore, online detection and early warning of chemical plant tail gas is of great significance.

[0003] Existing online detection and early warning for chemical plant exhaust gas mainly uses monitoring equipment to monitor the concentration of various pollutant gases in chemical exhaust gas in real time, and then processes, stores and analyzes them. When the concentration of pollutant gases detected exceeds the preset threshold, the alarm system will sound an alarm to notify relevant personnel or systems to take corresponding measures.

[0004] However, the existing online detection and early warning for chemical plant exhaust gas does not monitor and analyze the cooling steps in the chemical plant exhaust gas treatment process, and thus cannot obtain the cooling effect of the cooling system of the chemical plant exhaust gas. The cooling step can not only reduce the temperature and humidity of the exhaust gas, but also help to remove or reduce harmful substances in the chemical plant exhaust gas and achieve waste gas purification. Therefore, if the cooling treatment of the chemical plant exhaust gas is unqualified, unnecessary environmental pollution may occur.

[0005] The existing online detection and early warning for chemical plant exhaust gas does not monitor and analyze the exhaust gas of the chemical plant in each exhaust gas component removal step, so it is impossible to understand the removal effect of the exhaust gas of the chemical plant in each exhaust gas component removal step. The exhaust gas of the chemical plant may contain flammable, explosive and toxic gases. If these gases leak, they will not only cause poisoning, fire or even explosion accidents, seriously endangering people’s lives and property safety, but also cause serious pollution to the ecological environment, which is not conducive to the sustainable development of environmental protection. Summary of the invention

[0006] In view of this, in order to solve the problems raised in the above background technology, an online monitoring and alarm system for tail gas in a chemical plant is now proposed.

[0007] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides an online monitoring and alarm system for chemical plant exhaust gas, including: a component monitoring module, which is used to record the chemical exhaust gas of the target chemical plant as the target chemical plant exhaust gas, analyze the components of the collected target chemical plant exhaust gas, and obtain the components of each component of the target chemical plant exhaust gas, wherein each component includes solid particulate matter, acidic gas and organic gas.

[0008] The cooling monitoring module is used to perform real-time online monitoring of the cooling step of the tail gas of the target chemical plant, so as to obtain the temperature curve diagram of the tail gas of the target chemical plant before and after cooling.

[0009] The cooling analysis module is used to analyze the cooling effect evaluation coefficient of the tail gas of the target chemical plant. If it is less than or equal to a predefined cooling effect evaluation coefficient threshold, an alarm is issued to the cooling system of the target chemical plant.

[0010] The component removal monitoring module is used to perform real-time online monitoring of each component removal step of the target chemical plant tail gas, and obtain data information of the target chemical tail gas before and after the removal of solid particles, acid gases and organic gases.

[0011] The component removal analysis module is used to analyze the removal effect evaluation coefficients of solid particulate matter, acidic gas and organic gas in the tail gas of the target chemical plant, and then obtain the removal effect evaluation of solid particulate matter, acidic gas and organic gas in the tail gas of the target chemical plant.

[0012] The component removal alarm module is used to alarm for each component removal step of the target chemical plant tail gas whose removal effect is evaluated as unqualified.

[0013] The database is used to store the standard temperature difference of the exhaust gas of the target chemical plant before and after cooling, store the standard deviation of the permissible temperature monitored before cooling of the exhaust gas of the target chemical plant, store the mass of solid particulate matter allowed to exist in the exhaust gas of the target chemical plant after the solid particulate matter is removed, store the gas concentration allowed to exist in the components of the exhaust gas of the target chemical plant after the acid gas is removed, store the gas concentration allowed to exist in the components of the exhaust gas of the target chemical plant after the organic gas is removed, and store the removal effect evaluation coefficient thresholds of solid particulate matter, acid gas and organic gas.

[0014] Preferably, the data information of the target chemical tail gas before and after the solid particulate matter is removed includes a mass curve graph of the solid particulate matter.

[0015] The data information of the target chemical tail gas before and after the removal of acid gas and organic gas includes the gas concentrations of each component monitored at each time.

[0016] Preferably, the specific method for obtaining the temperature curve diagram of the exhaust gas from the target chemical plant before and after cooling is: by performing real-time online monitoring on the cooling step of the exhaust gas from the target chemical plant, the temperature of each monitoring before and after the cooling step of the exhaust gas from the target chemical plant is obtained, thereby establishing a two-dimensional coordinate system with the time point corresponding to each monitoring as the horizontal coordinate and the temperature corresponding to each monitoring as the vertical coordinate, and then drawing points and connecting lines in the two-dimensional coordinate system to obtain the temperature curve diagram of the exhaust gas from the target chemical plant before and after cooling.

[0017] Preferably, the specific analysis method of the cooling effect evaluation coefficient of the exhaust gas of the target chemical plant is: extract the temperature curve of the exhaust gas of the target chemical plant before and after cooling, make a difference in the ordinate to obtain the temperature difference of each monitoring of the exhaust gas of the target chemical plant before and after cooling, and analyze the cooling effect evaluation coefficient of the exhaust gas of the target chemical plant. ,in The target chemical plant tail gas before and after cooling The temperature difference of the monitoring is the standard temperature difference of the tail gas of the target chemical plant before and after cooling extracted from the database, is the influencing factor corresponding to the cooling effect evaluation coefficient of the target chemical plant exhaust gas, , is the number corresponding to each monitoring. To monitor the corresponding times, is a natural constant.

[0018] The cooling effect evaluation coefficient of the exhaust gas of the target chemical plant is compared with a predefined cooling effect evaluation coefficient threshold. If it is less than or equal to the predefined cooling effect evaluation coefficient, an alarm is issued to the cooling system of the target chemical plant, and the cooling system of the target chemical plant is further processed.

[0019] Preferably, the specific method of obtaining the influencing factor corresponding to the cooling effect evaluation coefficient of the tail gas of the target chemical plant is: according to the temperature curve of the tail gas of the target chemical plant before cooling, the temperature of each monitoring of the tail gas of the target chemical plant before cooling is obtained, and the influencing factor corresponding to the cooling effect evaluation coefficient of the tail gas of the target chemical plant is analyzed. ,in The target chemical plant tail gas before cooling The temperature monitored is the standard deviation of the permissible temperature of the target chemical plant exhaust gas monitored before cooling, extracted from the database.

[0020] Preferably, the specific analysis method of the solid particulate matter removal effect evaluation coefficient of the target chemical plant exhaust gas is: extract the mass curve of the solid particulate matter of the target chemical exhaust gas before and after the solid particulate matter removal, obtain the mass of the solid particulate matter of the target chemical plant exhaust gas at each monitoring before and after the solid particulate matter removal, and further subtract them to obtain the mass difference of the target chemical plant exhaust gas at each monitoring before and after the solid particulate matter removal.

[0021] Analyze the removal effect evaluation coefficient of solid particulate matter in the tail gas of the target chemical plant ,in They are the target chemical plant tail gas after solid particulate matter removal. The quality of solid particles monitored for the first time and the quality of tail gas from the target chemical plant before and after the removal of solid particles The quality of the monitoring is poor. is the mass of solid particles allowed to exist in the tail gas of the target chemical plant after solid particles are removed, extracted from the database. , It is the number corresponding to each monitoring in the solid particle removal step. is the number of monitoring times in the solid particle removal step, is a natural constant.

[0022] Preferably, the specific analysis method of the acid gas removal effect evaluation coefficient of the target chemical plant tail gas is: extracting the gas concentrations of each component of the target chemical tail gas before and after the acid gas removal, analyzing the acid gas removal effect evaluation coefficient of the target chemical plant tail gas ,in They are the target chemical tail gas before and after acid gas removal and their respective Component The gas concentration monitored at the time, is the gas concentration allowed to exist in the target chemical plant tail gas after acid gas removal extracted from the database. , is the number corresponding to each component of acid gas, is the quantity corresponding to the component of acid gas, , The numbers corresponding to each monitoring in the acid gas removal step, This corresponds to the number of monitorings in the acid gas removal step.

[0023] Preferably, the specific analysis method of the organic gas removal effect evaluation coefficient of the target chemical plant tail gas is: extracting the gas concentrations of each component of the target chemical tail gas before and after the organic gas removal, and analyzing the organic gas removal effect evaluation coefficient of the target chemical plant tail gas. ,in They are respectively the target chemical tail gas before and after the removal of organic gas and its Component The gas concentration monitored at the time, is the gas concentration allowed to exist in the target chemical plant tail gas after the organic gas is removed, extracted from the database. , is the number corresponding to each component of the organic gas, is the quantity corresponding to the component of organic gas, , It is the number corresponding to each monitoring in the organic gas removal step. This is the number of monitoring times in the organic gas removal step.

[0024] Preferably, the specific method for obtaining the removal effect evaluation of solid particulate matter, acid gas and organic gas in the tail gas of the target chemical plant is: extracting the removal effect evaluation coefficients of solid particulate matter, acid gas and organic gas in the tail gas of the target chemical plant.

[0025] The solid particle removal effect evaluation coefficient of the target chemical plant exhaust gas is compared with the solid particle removal effect evaluation coefficient threshold extracted from the database. If the solid particle removal effect evaluation coefficient of the target chemical plant exhaust gas is greater than the solid particle removal effect evaluation coefficient threshold, the solid particle removal effect evaluation of the target chemical plant exhaust gas is recorded as qualified; otherwise, the solid particle removal effect evaluation of the target chemical plant exhaust gas is recorded as unqualified.

[0026] Similarly, the removal effect evaluation of acidic gas and organic gas in the tail gas of the target chemical plant can be obtained.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention obtains the temperature curve diagrams of the target chemical plant's exhaust gas before and after cooling, and analyzes the cooling effect evaluation coefficient of the target chemical plant's exhaust gas, which is beneficial to understanding the cooling effect of the cooling system of the target chemical plant's exhaust gas treatment, thereby effectively avoiding unnecessary environmental pollution caused by the target chemical plant's unqualified cooling treatment of its chemical plant's exhaust gas, and is beneficial to protecting the ecological environment.

[0028] 2. The present invention obtains data information of the target chemical exhaust gas before and after the removal of solid particulate matter, acidic gas and organic gas, analyzes the removal effect evaluation coefficients of the solid particulate matter, acidic gas and organic gas of the target chemical plant exhaust gas, and then obtains the removal effect evaluation of the solid particulate matter, acidic gas and organic gas of the target chemical plant exhaust gas, which is helpful to understand the removal effect of the chemical plant exhaust gas in each exhaust gas component removal step, and is helpful to help the target chemical plant discover abnormal phenomena in the chemical plant exhaust gas treatment process, so as to solve them in time.

[0029] 3. The present invention can avoid the leakage of flammable, explosive and toxic gases contained in the tail gas of the chemical plant by giving an alarm for each component removal step of the target chemical plant tail gas whose removal effect is evaluated as unqualified, thereby avoiding the occurrence of poisoning, fire and even explosion accidents, protecting people's lives and property safety, avoiding pollution to the ecological environment, and being conducive to the sustainable development of environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of system module connection of the present invention.

[0032] Figure 2 It is a schematic diagram of the temperature curve of the tail gas of the target chemical plant of the present invention before and after cooling.

[0033] Figure 3 It is a schematic diagram of the mass curve of solid particles in the target chemical tail gas of the present invention before and after the solid particles are removed.

[0034] Description of the accompanying drawings: 1. Temperature curve of the target chemical plant exhaust gas before cooling; 2. Temperature curve of the target chemical plant exhaust gas after cooling; 3. Mass curve of solid particles in the target chemical exhaust gas before solid particles are removed; 4. Mass curve of solid particles in the target chemical exhaust gas after solid particles are removed. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1 As shown, the present invention provides an online monitoring and alarm system for tail gas in a chemical plant, and the specific modules are distributed as follows: component monitoring module, cooling monitoring module, cooling analysis module, component removal monitoring module, component removal analysis module, component removal alarm module and database. The connection mode between the modules is: the cooling monitoring module is connected to the component monitoring module and the cooling analysis module respectively, the component removal analysis module is connected to the component removal monitoring module and the component removal alarm module respectively, and the database is connected to the cooling analysis module and the component removal analysis module respectively.

[0037] The component monitoring module is used to record the chemical exhaust gas of the target chemical plant as the target chemical plant exhaust gas, analyze the components of the collected target chemical plant exhaust gas, and obtain the components of each component of the target chemical plant exhaust gas, wherein each component includes solid particulate matter, acidic gas and organic gas.

[0038] The cooling monitoring module is used to perform real-time online monitoring of the cooling step of the tail gas of the target chemical plant, so as to obtain the temperature curve diagram of the tail gas of the target chemical plant before and after cooling.

[0039] As a preferred specific example, the specific method for obtaining the temperature curve diagram of the exhaust gas of the target chemical plant before and after cooling is: by performing real-time online monitoring of the cooling step of the exhaust gas of the target chemical plant, the temperature of each monitoring before and after the cooling step of the exhaust gas of the target chemical plant is obtained, and then a two-dimensional coordinate system is established with the time point corresponding to each monitoring as the horizontal coordinate and the temperature corresponding to each monitoring as the vertical coordinate, and then points are drawn and lines are connected in the two-dimensional coordinate system to obtain the temperature curve diagram of the exhaust gas of the target chemical plant before and after cooling.

[0040] It needs to be further explained that the specific operation content of the real-time online monitoring of the cooling step of the exhaust gas of the target chemical plant is: the exhaust gas of the target chemical plant passes through the cooling system uninterruptedly, temperature sensors are arranged at both ends of the inlet and outlet of the cooling system, and the exhaust gas of the target chemical plant at the inlet and outlet of the cooling system is further detected by using the temperature sensor according to the set fixed interval time, and the temperature of each monitoring of the exhaust gas of the target chemical plant at the inlet and outlet of the cooling system is obtained, and it is recorded as the temperature of each monitoring before and after the cooling step of the exhaust gas of the target chemical plant.

[0041] Among them, the fixed interval time can be set to 30 seconds.

[0042] It needs to be further explained that after the exhaust gas of the target chemical plant passes through the inlet of the cooling system, it must then pass through the outlet of the cooling system. Therefore, the number of monitoring times before and after each monitoring of the temperature of the exhaust gas of the target chemical plant before and after the cooling step is consistent.

[0043] Among them, the temperature curves of the tail gas of the target chemical plant before and after cooling are as follows: Figure 2 shown.

[0044] The cooling analysis module is used to analyze the cooling effect evaluation coefficient of the tail gas of the target chemical plant. If it is less than or equal to a predefined cooling effect evaluation coefficient threshold, an alarm is issued to the cooling system of the target chemical plant.

[0045] As a preferred specific example, the specific analysis method of the cooling effect evaluation coefficient of the exhaust gas of the target chemical plant is: extract the temperature curve of the exhaust gas of the target chemical plant before and after cooling, make a difference in the ordinate to obtain the temperature difference of each monitoring of the exhaust gas of the target chemical plant before and after cooling, and analyze the cooling effect evaluation coefficient of the exhaust gas of the target chemical plant. ,in The target chemical plant tail gas before and after cooling The temperature difference of the monitoring is the standard temperature difference of the tail gas of the target chemical plant before and after cooling extracted from the database, is the influencing factor corresponding to the cooling effect evaluation coefficient of the target chemical plant exhaust gas, , is the number corresponding to each monitoring. To monitor the corresponding times, is a natural constant.

[0046] The cooling effect evaluation coefficient of the exhaust gas of the target chemical plant is compared with a predefined cooling effect evaluation coefficient threshold. If it is less than or equal to the predefined cooling effect evaluation coefficient, an alarm is issued to the cooling system of the target chemical plant, and the cooling system of the target chemical plant is further processed.

[0047] As a preferred specific example, the specific method for obtaining the influencing factor corresponding to the cooling effect evaluation coefficient of the exhaust gas of the target chemical plant is: according to the temperature curve of the exhaust gas of the target chemical plant before cooling, the temperature of each monitoring of the exhaust gas of the target chemical plant before cooling is obtained, and the influencing factor corresponding to the cooling effect evaluation coefficient of the exhaust gas of the target chemical plant is analyzed. ,in The target chemical plant tail gas before cooling The temperature monitored is the standard deviation of the permissible temperature of the target chemical plant exhaust gas monitored before cooling, extracted from the database.

[0048] The present invention obtains the temperature curve diagrams of the exhaust gas of the target chemical plant before and after cooling, and analyzes the cooling effect evaluation coefficient of the exhaust gas of the target chemical plant, which is beneficial to understanding the cooling effect of the cooling system of the exhaust gas treatment of the target chemical plant, thereby effectively avoiding unnecessary environmental pollution caused by unqualified cooling treatment of the exhaust gas of the target chemical plant, and is beneficial to protecting the ecological environment.

[0049] The component removal monitoring module is used to perform real-time online monitoring of each component removal step of the target chemical plant tail gas, and obtain data information of the target chemical tail gas before and after the removal of solid particles, acid gases and organic gases.

[0050] As a preferred specific example, the data information of the target chemical tail gas before and after the solid particulate matter is removed includes a mass curve graph of the solid particulate matter.

[0051] It needs to be further explained that the specific method of obtaining the mass curve of solid particles in the target chemical exhaust gas before and after the removal of solid particles is: the target chemical plant exhaust gas is continuously passed through the solid particle removal system, and a laser scattering instrument is arranged at the inlet and outlet of the solid particle removal system, so as to detect the mass of solid particles in the target chemical plant exhaust gas at the inlet and outlet of the solid particle removal system according to the set fixed interval time using the laser scattering instrument, and obtain the mass of solid particles monitored at each time at the inlet and outlet of the cooling system of the target chemical plant exhaust gas, and record it as the mass of solid particles monitored at each time before and after the solid particle removal step of the target chemical plant exhaust gas.

[0052] A two-dimensional coordinate system is further established with the time point corresponding to each monitoring as the horizontal coordinate and the mass of the solid particles monitored at each time as the vertical coordinate, and then points are drawn and lines are connected in the two-dimensional coordinate system to obtain a mass curve of the solid particles in the target chemical exhaust gas before and after the solid particles are removed.

[0053] It needs to be further explained that the fixed interval duration can be set to 30 seconds.

[0054] After passing through the inlet of the solid particle removal system, the target chemical plant exhaust gas must subsequently pass through the outlet of the solid particle removal system. Therefore, the number of monitoring times before and after each monitoring of the quality of solid particles in the target chemical plant exhaust gas before and after the cooling step is consistent.

[0055] Among them, the mass curve of solid particles in the target chemical tail gas before and after solid particles are removed is as follows: Figure 3 shown.

[0056] The data information of the target chemical tail gas before and after the removal of acid gas and organic gas includes the gas concentrations of each component monitored at each time.

[0057] It needs to be further explained that the specific method of obtaining the gas concentration of each component of the target chemical exhaust gas before and after the removal of acid gas and organic gas is: the target chemical plant exhaust gas is continuously passed through the acid gas and organic gas removal system, and the gas concentration of each component of the target chemical plant exhaust gas at the inlet and outlet of the acid gas and organic gas removal system is detected by using the deployed gas detector according to the set fixed interval time, and the gas concentration of each component of the target chemical plant exhaust gas at the inlet and outlet of the acid gas and organic gas removal system is obtained, and it is recorded as the gas concentration of each component of the target chemical exhaust gas before and after the removal of acid gas and organic gas.

[0058] It needs to be further explained that the fixed interval duration can be set to 30 seconds.

[0059] The component removal analysis module is used to analyze the removal effect evaluation coefficients of solid particulate matter, acidic gas and organic gas in the tail gas of the target chemical plant, and then obtain the removal effect evaluation of solid particulate matter, acidic gas and organic gas in the tail gas of the target chemical plant.

[0060] As a preferred specific example, the specific analysis method of the solid particulate matter removal effect evaluation coefficient of the target chemical plant exhaust gas is: extract the mass curve of the solid particulate matter of the target chemical exhaust gas before and after the solid particulate matter removal, obtain the mass of the solid particulate matter of the target chemical plant exhaust gas at each monitoring before and after the solid particulate matter removal, and further subtract them to obtain the mass difference of the target chemical plant exhaust gas at each monitoring before and after the solid particulate matter removal.

[0061] Analyze the removal effect evaluation coefficient of solid particulate matter in the tail gas of the target chemical plant ,in They are the target chemical plant tail gas after solid particulate matter removal. The quality of solid particles monitored for the first time and the quality of tail gas from the target chemical plant before and after the removal of solid particles The quality of the monitoring is poor. is the mass of solid particles allowed to exist in the tail gas of the target chemical plant after solid particles are removed, extracted from the database. , It is the number corresponding to each monitoring in the solid particle removal step. is the number of monitoring times in the solid particle removal step, is a natural constant.

[0062] As a preferred specific example, the specific analysis method of the acid gas removal effect evaluation coefficient of the target chemical plant tail gas is: extract the gas concentrations of each component of the target chemical tail gas before and after the acid gas removal, and analyze the acid gas removal effect evaluation coefficient of the target chemical plant tail gas. ,in They are the target chemical tail gas before and after acid gas removal and their respective Component The gas concentration monitored at the time, is the gas concentration allowed to exist in the target chemical plant tail gas after acid gas removal extracted from the database. , is the number corresponding to each component of acid gas, is the quantity corresponding to the component of acid gas, , The numbers corresponding to each monitoring in the acid gas removal step, This corresponds to the number of monitorings in the acid gas removal step.

[0063] As a preferred specific example, the specific analysis method of the organic gas removal effect evaluation coefficient of the target chemical plant tail gas is: extract the gas concentrations of each component of the target chemical tail gas before and after the organic gas removal, and analyze the organic gas removal effect evaluation coefficient of the target chemical plant tail gas. ,in They are respectively the target chemical tail gas before and after the removal of organic gas and its Component The gas concentration monitored at the time, is the gas concentration allowed to exist in the target chemical plant tail gas after the organic gas is removed, extracted from the database. , is the number corresponding to each component of the organic gas, is the quantity corresponding to the component of organic gas, , It is the number corresponding to each monitoring in the organic gas removal step. This is the number of monitoring times in the organic gas removal step.

[0064] As a preferred specific example, the specific method for obtaining the removal effect evaluation of solid particulate matter, acid gas and organic gas in the exhaust gas of the target chemical plant is: extracting the removal effect evaluation coefficients of solid particulate matter, acid gas and organic gas in the exhaust gas of the target chemical plant.

[0065] The solid particle removal effect evaluation coefficient of the target chemical plant exhaust gas is compared with the solid particle removal effect evaluation coefficient threshold extracted from the database. If the solid particle removal effect evaluation coefficient of the target chemical plant exhaust gas is greater than the solid particle removal effect evaluation coefficient threshold, the solid particle removal effect evaluation of the target chemical plant exhaust gas is recorded as qualified; otherwise, the solid particle removal effect evaluation of the target chemical plant exhaust gas is recorded as unqualified.

[0066] Similarly, the removal effect evaluation of acidic gas and organic gas in the tail gas of the target chemical plant can be obtained.

[0067] The present invention obtains data information of the target chemical exhaust gas before and after the removal of solid particulate matter, acidic gas and organic gas, analyzes the removal effect evaluation coefficients of the solid particulate matter, acidic gas and organic gas of the target chemical plant exhaust gas, and then obtains the removal effect evaluation of the solid particulate matter, acidic gas and organic gas of the target chemical plant exhaust gas, which is helpful for understanding the removal effect of the chemical plant exhaust gas in each exhaust gas component removal step, and is helpful for helping the target chemical plant to discover abnormal phenomena in the chemical plant exhaust gas treatment process, so as to solve them in time.

[0068] The component removal alarm module is used to alarm for each component removal step of the target chemical plant tail gas whose removal effect is evaluated as unqualified.

[0069] The present invention can avoid the leakage of flammable, explosive and toxic gases contained in the tail gas of the chemical plant by giving an alarm for each component removal step of the target chemical plant tail gas whose removal effect is evaluated as unqualified, thereby avoiding the occurrence of poisoning, fire and even explosion accidents, protecting people's lives and property safety, avoiding pollution to the ecological environment, and being conducive to the sustainable development of environmental protection.

[0070] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A chemical plant tail gas online monitoring and alarm system, characterized by: include: The component monitoring module is used to record the chemical tail gas of the target chemical plant as the tail gas of the target chemical plant, analyze the components of the collected tail gas of the target chemical plant, and obtain the components of each component of the tail gas of the target chemical plant, wherein each component includes solid particulate matter, acid gas and organic gas; A cooling monitoring module is used to perform real-time online monitoring of the cooling step of the tail gas of the target chemical plant, so as to obtain a temperature curve diagram of the tail gas of the target chemical plant before and after cooling; A cooling analysis module is used to analyze the cooling effect evaluation coefficient of the tail gas of the target chemical plant. If the cooling effect evaluation coefficient is less than or equal to a predefined cooling effect evaluation coefficient threshold, an alarm is issued to the cooling system of the target chemical plant. The component removal monitoring module is used to perform real-time online monitoring of each component removal step of the target chemical plant tail gas, and obtain data information of the target chemical tail gas before and after the removal of solid particles, acid gas and organic gas; The component removal analysis module is used to analyze the removal effect evaluation coefficients of solid particulate matter, acidic gas and organic gas in the tail gas of the target chemical plant, and then obtain the removal effect evaluation of solid particulate matter, acidic gas and organic gas in the tail gas of the target chemical plant; A component removal alarm module is used to alarm each component removal step of the target chemical plant tail gas whose removal effect is evaluated as unqualified; A database for storing the standard temperature difference of the tail gas of the target chemical plant before and after cooling, storing the standard deviation of the permissible temperature of the tail gas of the target chemical plant before cooling, storing the mass of solid particulate matter allowed to exist in the tail gas of the target chemical plant after solid particulate matter is removed, storing the gas concentration allowed to exist in the components of the tail gas of the target chemical plant after acid gas removal, storing the gas concentration allowed to exist in the components of the tail gas of the target chemical plant after organic gas removal, and storing the threshold values ​​of the evaluation coefficients of the removal effect of solid particulate matter, acid gas and organic gas; The specific method for obtaining the temperature curve of the tail gas of the target chemical plant before and after cooling is: By performing real-time online monitoring on the cooling step of the tail gas of the target chemical plant, the temperature of each monitoring before and after the cooling step of the tail gas of the target chemical plant is obtained, so as to establish a two-dimensional coordinate system with the time point corresponding to each monitoring as the horizontal coordinate and the temperature corresponding to each monitoring as the vertical coordinate, and then plot points and connect lines in the two-dimensional coordinate system to obtain a temperature curve diagram of the tail gas of the target chemical plant before and after cooling; The specific analysis method of the cooling effect evaluation coefficient of the target chemical plant tail gas is: Extract the temperature curve of the tail gas of the target chemical plant before and after cooling, make a difference in the ordinate to obtain the temperature difference of each monitoring before and after cooling of the tail gas of the target chemical plant, and analyze the cooling effect evaluation coefficient of the tail gas of the target chemical plant ,in The target chemical plant tail gas before and after cooling The temperature difference of the monitoring is the standard temperature difference of the tail gas of the target chemical plant before and after cooling extracted from the database, is the influencing factor corresponding to the cooling effect evaluation coefficient of the target chemical plant exhaust gas, , is the number corresponding to each monitoring. To monitor the corresponding times, is a natural constant; Compare the cooling effect evaluation coefficient of the tail gas of the target chemical plant with a predefined cooling effect evaluation coefficient threshold value. If the cooling effect evaluation coefficient is less than or equal to the predefined cooling effect evaluation coefficient, an alarm is issued to the cooling system of the target chemical plant, and the cooling system of the target chemical plant is further processed. The specific method of obtaining the influencing factor corresponding to the cooling effect evaluation coefficient of the tail gas of the target chemical plant is as follows: According to the temperature curve of the tail gas of the target chemical plant before cooling, the temperature of each monitoring of the tail gas of the target chemical plant before cooling is obtained, and the influencing factors corresponding to the cooling effect evaluation coefficient of the tail gas of the target chemical plant are analyzed. ,in The target chemical plant tail gas before cooling The temperature monitored is the standard deviation of the permissible temperature of the tail gas of the target chemical plant before cooling extracted from the database; The specific analysis method of the removal effect evaluation coefficient of the solid particulate matter in the tail gas of the target chemical plant is: Extract the mass curve of solid particles in the target chemical tail gas before and after the solid particles are removed, and obtain the mass of solid particles in each monitoring of the target chemical plant tail gas before and after the solid particles are removed, and further make a difference to obtain the mass difference of each monitoring of the target chemical plant tail gas before and after the solid particles are removed; Analyze the removal effect evaluation coefficient of solid particulate matter in the tail gas of the target chemical plant ,in They are the target chemical plant tail gas after solid particulate matter removal. The quality of solid particles monitored for the first time and the quality of tail gas from the target chemical plant before and after the removal of solid particles The quality of the secondary monitoring is poor. is the mass of solid particles allowed to exist in the tail gas of the target chemical plant after solid particles are removed, extracted from the database. , It is the number corresponding to each monitoring in the solid particle removal step. is the number of monitoring times in the solid particle removal step, is a natural constant; The specific analysis method of the removal effect evaluation coefficient of the acid gas in the tail gas of the target chemical plant is: Extract the gas concentrations of each component of the target chemical tail gas before and after the acid gas removal, and analyze the acid gas removal effect evaluation coefficient of the target chemical plant tail gas ,in They are the target chemical tail gas before and after acid gas removal and their respective Component The gas concentration monitored at the time, is the gas concentration allowed to exist in the target chemical plant tail gas after acid gas removal extracted from the database. , is the number corresponding to each component of acid gas, is the quantity corresponding to the component of acid gas, , The numbers corresponding to each monitoring in the acid gas removal step, The number of times corresponding to the monitoring in the acid gas removal step; The specific analysis method of the removal effect evaluation coefficient of the organic gas in the tail gas of the target chemical plant is: Extract the gas concentrations of each component of the target chemical tail gas before and after the removal of organic gas, and analyze the removal effect evaluation coefficient of organic gas in the tail gas of the target chemical plant ,in They are respectively the target chemical tail gas before and after the removal of organic gas and its Component The gas concentration monitored at the time, is the gas concentration allowed to exist in the target chemical plant tail gas after the organic gas is removed, extracted from the database. , is the number corresponding to each component of the organic gas, is the quantity corresponding to the component of organic gas, , It is the number corresponding to each monitoring in the organic gas removal step. This is the number of monitoring times in the organic gas removal step.

2. The on-line monitoring and alarm system for tail gas from a chemical plant according to claim 1 is characterized in that: The data information of the target chemical tail gas before and after the solid particulate matter is removed includes a mass curve of the solid particulate matter; The data information of the target chemical tail gas before and after the removal of acid gas and organic gas includes the gas concentrations of each component monitored at each time.

3. The online monitoring and alarm system for tail gas from a chemical plant according to claim 1 is characterized by: The specific method for obtaining the removal effect evaluation of solid particulate matter, acid gas and organic gas in the tail gas of the target chemical plant is: Extract the removal effect evaluation coefficients of solid particulate matter, acid gas and organic gas from the tail gas of the target chemical plant; The solid particle removal effect evaluation coefficient of the tail gas of the target chemical plant is compared with the solid particle removal effect evaluation coefficient threshold value extracted from the database. If the solid particle removal effect evaluation coefficient of the tail gas of the target chemical plant is greater than the solid particle removal effect evaluation coefficient threshold value, the solid particle removal effect evaluation of the tail gas of the target chemical plant is recorded as qualified. Otherwise, the solid particle removal effect evaluation of the tail gas of the target chemical plant is recorded as unqualified. Similarly, the removal effect evaluation of acidic gas and organic gas in the tail gas of the target chemical plant can be obtained.

Images