Distributed detection method for carbon emission of cement plant

Abstract

The invention discloses a distributed detection method for carbon emission of a cement plant. According to the invention, an on-line detection system is installed and comprises an atmospheric pressure measurement module, a flow measurement module, a pressure measurement module, a temperature measurement module, a humidity measurement module, an oxygen measurement module, a carbon dioxide measurement module and an electric meter. Measuring atmospheric pressure, flue gas flow, flue gas pressure, flue gas temperature, flue gas humidity, O2 content in flue gas, CO2 content in flue gas and purchased electric quantity respectively; the alarm module is arranged, related workers can obtain carbon emission standard exceeding information through a safety alarm center, therefore, in the using process of the method, carbon emission can be supervised and controlled more efficiently and timely, the detection efficiency in the using process is improved, meanwhile, multiple detection sensors are arranged, and the detection accuracy is improved. And in the detection process, the exhaust gas can be analyzed and detected more comprehensively, so that the use convenience and the detection accuracy are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emission detection in cement plants, and specifically relates to a distributed detection method for carbon emission in cement plants. Background Art

[0002] The cement industry has high energy resource consumption and heavy environmental load, and the problem of energy conservation and emission reduction needs to be solved urgently. The management level of energy conservation and emission reduction in the cement industry needs to be further improved. The statistical, monitoring and assessment system of energy conservation and emission reduction in the cement industry needs to be established and improved. The cement industry is the focus and difficulty of energy conservation and emission reduction in the industrial field. Increasing energy conservation and emission reduction efforts has become an arduous and urgent task facing the cement industry. In order to study energy conservation and emission reduction, achieve energy conservation and emission reduction, tap the potential of people and machines, achieve the goal of high quality, low cost, low energy consumption and low emissions in cement production, promote scientific and technological progress and standardization work, and promote the deep integration of the cement industry with informatization, it is of great significance to adopt new ideas and technologies for energy conservation and emission reduction. When cement plants emit waste gas, they need to monitor their carbon emissions.

[0003] However, common detection systems cannot give timely alarms when in use, making it difficult to supervise the factory. Summary of the invention

[0004] The purpose of the present invention is to provide a distributed detection method for carbon emissions from a cement plant in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows: a distributed detection method for carbon emissions from cement plants, the distributed detection method for carbon emissions from cement plants comprising the following steps: S1: Arrange the inspection points and select the 350MW unit as the first pilot unit for the inspection system. The equipment is installed in the tail flue section before the chimney; S2: The section where the environmental protection comparison flange hole outside the tail flue is located is taken as the sampling section; the sampling points are set based on the grid method, the CO2 concentration at the section measuring point is measured using a flue gas analyzer, and the flue gas differential pressure at the section measuring point is measured using an electronic micro differential pressure gauge. S3: Install an online detection system, which includes an atmospheric pressure measurement module, a flow measurement module, a pressure measurement module, a temperature measurement module, a humidity measurement module, an oxygen measurement module, a carbon dioxide measurement module, and an electric meter, which respectively measure atmospheric pressure, flue gas flow, flue gas pressure, flue gas temperature, flue gas humidity, O2 content in flue gas, CO2 content in flue gas, and purchased electricity; S4: After the sampling probe is installed, the flue gas is sampled, and the sample gas enters the analysis cabinet through the sampling and heating pipelines. In the analysis cabinet, the three flue gases are mixed, pre-treated, and measured to obtain the CO2 concentration; the parameters such as carbon dioxide concentration, flow, oxygen content, pressure, temperature, humidity, etc. are transmitted to the input end of the remote data transmission module; S5: The remote data transmission module inputs the data into the analysis module. The data analysis module selects the coal combustion emission factor as 95.7 g / MJ based on the production data such as coal type, coal quantity, and low calorific value provided by the cement plant, and calculates the carbon emissions of the cement plant based on the emission factor method. S6: After the analysis is completed, the analysis results are uploaded and stored in the cloud storage module. When the carbon emissions obtained by the analysis exceed the set mark, an alarm will be issued. S7: The alarm module is internally provided with a fence server, which generates and receives high-voltage pulse signals, and generates an alarm signal when the front-end detects that the fence is in a state of touching the grid, short circuit, or open circuit, and sends the information of excessive carbon emissions to the security alarm center.

[0006] In a preferred embodiment, in step S1, the equipment includes: one empty box barometer, one electronic micro differential pressure gauge, one Pitot tube, two flue gas analyzers, and several flue gas sampling tubes.

[0007] In a preferred embodiment, in step S2, the flue measurement section is 5 meters deep and 5 meters high, with the flue depth as the X-axis and the height as the Y-axis, and 30 measuring points are taken.

[0008] In a preferred embodiment, in step S3, the carbon emission detection data management and analysis expert subsystem is essentially software, which is used to calculate the carbon dioxide emission rate, the total carbon dioxide emissions, and analyze the carbon emission data to propose targeted emission reduction and carbon trading strategies.

[0009] In a preferred embodiment, in step S4, a dedicated electric heating sampling probe (installed in the flue) has a built-in filter, which includes a sampling and purging unit; under the action of the vacuum pump, the flue gas enters the sampling probe through the sampling probe (the sampling probe can be configured with different lengths according to customer requirements), and a 5um filter is arranged at the probe to filter dust in the flue gas; the sampling probe has electric heating to stabilize the sample gas temperature at 140-160°C to prevent condensation of water vapor in the sample gas; the condensation of water vapor in the sample gas will corrode the sampling probe, and the condensed water will dissolve CO2 in the flue gas and affect the measurement; the device is also provided with a backflush calibration port, the purpose of which is to use clean compressed air to blow the dust attached to the outer surface of the filter back into the flue to prevent the sampling probe from being blocked; due to the limited installation position on site, the backflush tank is placed externally.

[0010] In a preferred embodiment, in step S4, the sampling pipeline is used to connect the sampling probe and the pretreatment system, which adopts electric heating; this project adopts an internal double-core polytetrafluoroethylene corrosion-resistant hose, and the internal temperature of the sampling tube is controlled at 140-160°C, which can prevent water vapor from condensing and generating acid with SO2 to corrode the pipeline.

[0011] In a preferred embodiment, in step S5, an NDIR analyzer and a TDLAS analyzer are provided inside the data analysis module; the NDIR analyzer uses the infrared absorption of CO near 14.6m in the infrared region to measure the concentration of CO in the flue gas; and uses the infrared absorption of CO2 near 4.3m to measure the concentration of CO2 in the flue gas.

[0012] In a preferred embodiment, in step S7, the front-end detection fence is a tangible perimeter composed of components such as rods and metal wires, and multi-level networking is achieved through a control keyboard or control software.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In the present invention, an alarm module is provided, and relevant staff can obtain information on excessive carbon emissions through a safety alarm center, so that during use of the method, carbon emissions can be supervised and controlled more efficiently and timely, thereby improving the detection efficiency during use. At the same time, a variety of detection sensors are provided, so that during the detection process, the exhaust gas can be analyzed and detected more comprehensively, thereby improving the convenience during use and the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a flow chart of the present invention. Implementation

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] Reference Figure 1 , Example

[0017] A distributed detection method for carbon emissions from a cement plant, the distributed detection method for carbon emissions from a cement plant comprising the following steps: S1: Arrange the inspection points and select the 350MW unit as the first pilot unit for the inspection system. The equipment is installed in the tail flue section before the chimney; S2: The section where the environmental protection comparison flange hole outside the tail flue is located is taken as the sampling section; the sampling points are set based on the grid method, the CO2 concentration at the section measuring point is measured using a flue gas analyzer, and the flue gas differential pressure at the section measuring point is measured using an electronic micro differential pressure gauge. S3: Install an online detection system, which includes an atmospheric pressure measurement module, a flow measurement module, a pressure measurement module, a temperature measurement module, a humidity measurement module, an oxygen measurement module, a carbon dioxide measurement module, and an electric meter, which respectively measure atmospheric pressure, flue gas flow, flue gas pressure, flue gas temperature, flue gas humidity, O2 content in flue gas, CO2 content in flue gas, and purchased electricity; S4: After the sampling probe is installed, the flue gas is sampled, and the sample gas enters the analysis cabinet through the sampling and heating pipelines. In the analysis cabinet, the three flue gases are mixed, pre-treated, and measured to obtain the CO2 concentration; the parameters such as carbon dioxide concentration, flow, oxygen content, pressure, temperature, humidity, etc. are transmitted to the input end of the remote data transmission module; S5: The remote data transmission module inputs the data into the analysis module. The data analysis module selects the coal combustion emission factor as 95.7 g / MJ based on the production data such as coal type, coal quantity, and low calorific value provided by the cement plant, and calculates the carbon emissions of the cement plant based on the emission factor method. S6: After the analysis is completed, the analysis results are uploaded and stored in the cloud storage module. When the carbon emissions obtained by the analysis exceed the set mark, an alarm will be issued. S7: The alarm module is internally provided with a fence server, which generates and receives high-voltage pulse signals, and generates an alarm signal when the front-end detects that the fence is in a state of touching the grid, short circuit, or open circuit, and sends the information of excessive carbon emissions to the security alarm center.

[0018] In step S1, the equipment includes: one empty box barometer, one electronic micro differential pressure gauge, one Pitot tube, two flue gas analyzers, and several flue gas sampling tubes.

[0019] In step S2, the flue measurement section is 5 meters deep and 5 meters high, with the flue depth as the X-axis and the height as the Y-axis, and 30 measuring points are taken.

[0020] In step S3, the carbon emission detection data management and analysis expert subsystem is essentially software, which is used to calculate the carbon dioxide emission rate, the total carbon dioxide emissions, and analyze the carbon emission data to propose targeted emission reduction and carbon trading strategies.

[0021] In step S4, a dedicated electric heating sampling probe (installed in the flue) has a built-in filter, which includes a sampling and purging unit; under the action of the vacuum pump, the flue gas enters the sampling probe through the sampling probe (the sampling probe can be configured with different lengths according to customer requirements), and a 5um filter is arranged at the probe to filter dust in the flue gas; the sampling probe has electric heating to stabilize the sample gas temperature at 140-160°C to prevent condensation of water vapor in the sample gas; the condensation of water vapor in the sample gas will corrode the sampling probe, and the condensed water will dissolve CO2 in the flue gas and affect the measurement; the device is also provided with a back-blowing calibration port, the purpose of which is to use clean compressed air to blow the dust attached to the outer surface of the filter back into the flue to prevent the sampling probe from being blocked; due to the limited installation position on site, the back-blowing tank is external.

[0022] In step S4, the sampling pipeline is used to connect the sampling probe and the pretreatment system, and it adopts electric heating. This project adopts an internal double-core polytetrafluoroethylene corrosion-resistant hose, and the internal temperature of the sampling tube is controlled at 140-160°C to prevent water vapor from condensing and generating acid with SO2 to corrode the pipeline.

[0023] In step S5, the data analysis module is internally provided with an NDIR analyzer and a TDLAS analyzer; the NDIR analyzer uses the infrared absorption of CO in the infrared region near 14.6m to measure the concentration of CO in the flue gas; and uses the infrared absorption of CO2 near 4.3m to measure the concentration of CO2 in the flue gas; In step S7, the front-end detection fence is a tangible perimeter composed of components such as rods and metal wires, and multi-level networking is achieved through a control keyboard or control software.

[0024] In the present invention, an alarm module is provided, and relevant staff can obtain information on excessive carbon emissions through a safety alarm center, so that during use of the method, carbon emissions can be supervised and controlled more efficiently and timely, thereby improving the detection efficiency during use. At the same time, a variety of detection sensors are provided, so that during the detection process, the exhaust gas can be analyzed and detected more comprehensively, thereby improving the convenience during use and the detection accuracy.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distributed detection method for carbon emissions from cement plants, characterized in that: The cement plant carbon emission distributed detection method comprises the following steps: S1: Arrange the inspection points and select the 350MW unit as the first pilot unit for the inspection system. The equipment is installed in the tail flue section before the chimney; S2: The section where the environmental protection comparison flange hole outside the tail flue is located is taken as the sampling section; the sampling points are set based on the grid method, the CO2 concentration at the section measuring point is measured using a flue gas analyzer, and the flue gas differential pressure at the section measuring point is measured using an electronic micro differential pressure gauge. S3: Install an online detection system, which includes an atmospheric pressure measurement module, a flow measurement module, a pressure measurement module, a temperature measurement module, a humidity measurement module, an oxygen measurement module, a carbon dioxide measurement module, and an electric meter, which respectively measure atmospheric pressure, flue gas flow, flue gas pressure, flue gas temperature, flue gas humidity, O2 content in flue gas, CO2 content in flue gas, and purchased electricity; S4: After the sampling probe is installed, the flue gas is sampled, and the sample gas enters the analysis cabinet through the sampling and heating pipelines. In the analysis cabinet, the three flue gases are mixed, pre-treated, and measured to obtain the CO2 concentration; the parameters such as carbon dioxide concentration, flow, oxygen content, pressure, temperature, humidity, etc. are transmitted to the input end of the remote data transmission module; S5: The remote data transmission module inputs the data into the analysis module. The data analysis module selects the coal combustion emission factor as 95.7 g / MJ based on the production data such as coal type, coal quantity, and low calorific value provided by the cement plant, and calculates the carbon emissions of the cement plant based on the emission factor method. S6: After the analysis is completed, the analysis results are uploaded and stored in the cloud storage module. When the carbon emissions obtained by the analysis exceed the set mark, an alarm will be issued. S7: The alarm module is internally provided with a fence server, which generates and receives high-voltage pulse signals, and generates an alarm signal when the front-end detects that the fence is in a state of touching the grid, short circuit, or open circuit, and sends the information of excessive carbon emissions to the security alarm center.

2. A cement plant carbon emission distributed detection method as claimed in claim 1, characterized in that: In step S1, the equipment includes: one empty box barometer, one electronic micro differential pressure gauge, one Pitot tube, two flue gas analyzers, and several flue gas sampling tubes.

3. A distributed detection method for carbon emissions from a cement plant as claimed in claim 1, characterized in that: In step S2, the flue measurement section is 5 meters deep and 5 meters high, with the flue depth as the X-axis and the height as the Y-axis, and 30 measuring points are taken.

4. A method for distributed detection of carbon emissions from cement plants as claimed in claim 1, characterized in that: In step S3, the carbon emission detection data management and analysis expert subsystem is essentially software, which is used to calculate the carbon dioxide emission rate, the total carbon dioxide emissions, and analyze the carbon emission data to propose targeted emission reduction and carbon trading strategies.

5. A distributed detection method for carbon emissions from a cement plant as claimed in claim 1, characterized in that: In step S4, a dedicated electric heating sampling probe has a built-in filter, which includes a sampling and purging unit; under the action of the vacuum pump, the flue gas enters the sampling probe through the sampling probe rod, and a 5um filter is arranged at the probe to filter the dust in the flue gas; the sampling probe has electric heating to stabilize the sample gas temperature at 140-160°C to prevent condensation of water vapor in the sample gas; the condensation of water vapor in the sample gas will corrode the sampling probe, and the condensed water will dissolve CO2 in the flue gas and affect the measurement; the device is also provided with a backflush calibration port, the purpose of which is to use clean compressed air to blow the dust attached to the outer surface of the filter back into the flue to prevent the sampling probe from being blocked; due to the limited installation position on site, the backflush tank is placed externally.

6. A distributed detection method for carbon emissions from a cement plant as claimed in claim 1, characterized in that: In step S4, the sampling pipeline is used to connect the sampling probe and the pretreatment system, and it adopts electric heating. This project adopts an internal double-core polytetrafluoroethylene corrosion-resistant hose, and the internal temperature of the sampling tube is controlled at 140-160°C to prevent water vapor from condensing and generating acid with SO2 to corrode the pipeline.

7. A distributed detection method for carbon emissions from a cement plant as claimed in claim 1, characterized in that: In step S5, the data analysis module is internally provided with an NDIR analyzer and a TDLAS analyzer; the NDIR analyzer uses the infrared absorption of CO near 14.6m in the infrared region to measure the concentration of CO in the flue gas; and uses the infrared absorption of CO2 near 4.3m to measure the concentration of CO2 in the flue gas.

8. A cement plant carbon emission distributed detection method as claimed in claim 1, characterized in that: In step S7, the front-end detection fence is a tangible perimeter composed of components such as rods and metal wires, and multi-level networking is achieved through a control keyboard or control software.

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