A coke oven tail gas carbon emission multi-point synchronous sampling module for a steel plant

Abstract

The utility model discloses a kind of coke oven tail gas carbon emission multipoint synchronous sampling module of steel plant, the utility model relates to environmental monitoring technical field.It is connected with vacuum sampling pump in the outer wall of chimney, the outer wall of vacuum sampling pump is connected with sampling tube in chimney inside, the outside of sampling tube is equipped with protective sleeve, the outer wall of vacuum sampling pump is connected with heat tracing pipeline, the end of heat tracing pipeline away from vacuum sampling pump is connected with four-way electromagnetic valve;By three vacuum sampling pumps, tail gas is synchronously extracted from different areas in chimney, combined with four-way electromagnetic valve, tail gas of each sampling point is sequentially cut into pretreatment system, the nearly simultaneous acquisition of multipoint tail gas sample is realized, the limitation of single-point sampling is avoided, and the overall distribution of tail gas carbon emission in chimney can be more comprehensively reflected.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, specifically a multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in steel plants. Background Technology

[0002] Traditional staggered sampling results in time differences, failing to reflect instantaneous overall carbon emissions and leading to discrepancies in the collected samples. To avoid operational fluctuation errors caused by time-sharing sampling and ensure that all samples represent the emission state at the same instantaneous point in time, automatic, continuous, and constant-rate sampling and preprocessing of emissions from multiple locations in the coke oven are performed. The processed standard gas is then sent to an analyzer for analysis, ultimately calculating the carbon emissions of the entire coke oven process. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in steel plants, which solves the problem of discrepancies in the collected samples.

[0005] (II) Technical Solution

[0006] To solve the above problems, this utility model achieves the following technical solution: a multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in steel plants, comprising: a chimney, a vacuum sampling pump penetrating the outer wall of the chimney, a sampling pipe penetrating the outer wall of the vacuum sampling pump located inside the chimney, a protective sleeve covering the sampling pipe, an insulated heat tracing pipeline penetrating the outer wall of the vacuum sampling pump, a four-way solenoid valve penetrating the end of the insulated heat tracing pipeline away from the vacuum sampling pump, a branch pipe penetrating the outer wall of the chimney on the side of the vacuum sampling pump, an air supply pipe penetrating one end of the branch pipe, and an air pump penetrating the end of the air supply pipe away from the branch pipe. The cooperation of the vacuum sampling pump and the sampling pipe can extract exhaust gas from the chimney, meeting the basic sampling requirements; the protective sleeve... The protection of the sampling tubes reduces damage caused by contact with complex exhaust gases, extends their service life, and lowers equipment maintenance costs. The insulated and heated pipelines are heated throughout to prevent condensation of moisture and tar in the high-temperature flue gas, which could lead to pipe blockage and component adsorption loss. The four-way solenoid valve sequentially and briefly switches each sample gas stream into the common pretreatment system, allowing for near-simultaneous acquisition of samples from all locations in a very short time. Before and after startup and shutdown, the sampling pipelines and pretreatment system are purged with clean gas to remove residual gases and moisture, protecting the analyzer and pipelines. The vacuum sampling pump is a 1.25:1 ratio plunger pump-4-HL, the four-way solenoid valve is SHF-70-911, and the gas pump is BLC70-037.

[0007] Preferably, the outer wall of the protective sleeve is fixedly connected to the inner wall of the chimney, and the end of the branch pipe away from the air supply pipe extends to the inner wall of the protective sleeve. Three vacuum sampling pumps are provided, and a PLC controller is fixedly connected to the outer wall of the chimney. The branch pipes extend to the inner wall of the protective sleeve, and the air delivered by the air pumps is introduced into the interior of the protective sleeve through the branch pipes to clean the impurities adsorbed by the protective sleeve. The setting of three vacuum sampling pumps realizes multi-point synchronous sampling, which can obtain more comprehensive exhaust gas samples compared with single-point sampling. It can more accurately reflect the overall situation of carbon emissions from coke oven exhaust gas, avoid detection deviations caused by the limitations of single-point sampling, and provide more comprehensive data support for carbon emission accounting.

[0008] Preferably, a filter is connected to the outer wall of the four-way solenoid valve away from the heat tracing pipeline. A dehumidifier is connected to the end of the filter away from the four-way solenoid valve. A pressure regulating valve is connected to the end of the dehumidifier away from the filter. A connecting pipe is connected to the end of the pressure regulating valve away from the dehumidifier. A gas analyzer is connected to the end of the connecting pipe away from the pressure regulating valve via a flange. The filter filters impurities in the exhaust gas, preventing them from entering subsequent components such as the dehumidifier, pressure regulating valve, and gas analyzer. This reduces wear or blockage of these components, extends their service life, and prevents impurities from affecting the accuracy of the test results, providing a clean exhaust gas sample for subsequent testing. The dehumidifier removes moisture from the exhaust gas, preventing moisture from affecting the adjustment accuracy of the pressure regulating valve and preventing moisture from damaging the precision components inside the gas analyzer. This ensures the normal operation of the pressure regulating valve and the gas analyzer, improving the detection efficiency. The reliability of the measured data is ensured by the pressure regulating valve, which adjusts the tail gas pressure to allow the tail gas to enter the gas analyzer at a suitable pressure. This ensures the gas analyzer operates at its optimal working pressure, improving detection accuracy and stability, and preventing deviations in test results or equipment damage due to excessively high or low pressure. The connecting pipe stably delivers the treated tail gas, ensuring smooth entry into the gas analyzer and preventing leaks or unstable flow during delivery, thus guaranteeing the continuity of the detection process. The flange connection facilitates the installation, disassembly, and maintenance of the gas analyzer. When the gas analyzer needs calibration, repair, or replacement, the operation is more convenient, reducing equipment downtime and improving the maintenance efficiency of the entire sampling system. The filter model is JB-WU-63X, the dehumidifier model is MITEK DN300PN16, the pressure regulating valve model is self-regulating pressure regulating valve-B-20-P, and the gas analyzer model is ST6.

[0009] Preferably, the signal input terminal of the PLC controller is electrically connected to the vacuum sampling pump, and the signal output terminal is electrically connected to the air pump, four-way solenoid valve, dehumidifier, pressure regulating valve, and gas analyzer. The connection between the signal input terminal of the PLC controller and the vacuum sampling pump enables real-time monitoring of the vacuum sampling pump's operating status and timely detection of abnormal conditions, such as malfunctions or parameters deviating from the normal range. This facilitates timely intervention by staff, preventing sampling interruptions or inaccurate sampling data due to vacuum sampling pump malfunctions, and ensuring the stability and reliability of the sampling process. The PLC controller controls the air pump, four-way solenoid valve, dehumidifier, pressure regulating valve, and gas analyzer through its signal output terminal, achieving coordinated operation of all components in the entire sampling system. The operating parameters of each component can be flexibly adjusted according to the actual sampling situation and the operating status of the vacuum sampling pump, ensuring that the entire system is always in optimal operating condition, improving sampling efficiency and the accuracy of sampling data. Staff do not need to frequently manually adjust the parameters of each component; they only need to monitor the operating status of the PLC controller, thus improving the convenience and intelligence of the sampling work.

[0010] (III) Beneficial Effects

[0011] This utility model provides a multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in steel plants. It has the following beneficial effects:

[0012] (I) This multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in steel plants uses three vacuum sampling pumps to simultaneously extract exhaust gas from different areas inside the chimney. Combined with a four-way solenoid valve, the exhaust gas from each sampling point is sequentially fed into the pretreatment system, achieving near-simultaneous acquisition of exhaust gas samples from multiple points. This avoids the limitations of single-point sampling and can more comprehensively reflect the overall distribution of carbon emissions from exhaust gas inside the chimney. At the same time, the heat-tracing pipeline can prevent component loss caused by the condensation of moisture and tar in the exhaust gas. The filter and dehumidifier remove impurities and moisture respectively, and the pressure regulating valve stabilizes the exhaust gas pressure. The multi-stage pretreatment ensures the quality of the exhaust gas samples entering the gas analyzer, effectively reducing detection deviations and providing data support for the carbon emission accounting of coke oven exhaust gas in steel plants.

[0013] (II) This multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in steel plants uses a gas pump, branch pipes, and delivery pipe to purge the pipelines with clean gas before system startup and after shutdown. This removes residual impurities and moisture, reduces the risk of pipeline blockage and component damage, and extends the service life of the equipment. In addition, the gas analyzer and connecting pipe are connected by flanges, which makes subsequent calibration, maintenance or replacement convenient, shortens equipment downtime, and reduces maintenance costs and production impact. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the overall process of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the dynamic flowchart of this utility model;

[0018] Figure 5 This is a simplified structural diagram of the present invention.

[0019] In the diagram: 1. Chimney; 2. Vacuum sampling pump; 3. Air pump; 4. Branch pipe; 5. Gas supply pipe; 6. Insulated heat tracing pipeline; 7. Four-way solenoid valve; 8. Filter; 9. Dehumidifier; 10. Pressure regulating valve; 11. Connecting pipe; 12. Gas analyzer; 13. PLC controller; 14. Protective sleeve; 15. Sampling tube. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides a technical solution for a multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in steel plants, comprising: a chimney 1, a vacuum sampling pump 2 connected through the outer wall of the chimney 1, a sampling pipe 15 connected through the outer wall of the vacuum sampling pump 2 inside the chimney 1, a protective sleeve 14 covering the outside of the sampling pipe 15, an insulated heat tracing pipeline 6 connected through the outer wall of the vacuum sampling pump 2, a four-way solenoid valve 7 connected through the end of the insulated heat tracing pipeline 6 away from the vacuum sampling pump 2, a branch pipe 4 connected through the outer wall of the chimney 1 on one side of the vacuum sampling pump 2, an air supply pipe 5 connected through one end of the branch pipe 4, and an air pump 3 connected through the end of the air supply pipe 5 away from the branch pipe 4.

[0022] The outer wall of the protective sleeve 14 is fixedly connected to the inner wall of the chimney 1. The end of the branch pipe 4 away from the gas supply pipe 5 extends to the inner wall of the protective sleeve 14. Three vacuum sampling pumps 2 are provided. A PLC controller 13 is fixedly connected to the outer wall of the chimney 1. The signal input terminal of the PLC controller 13 is electrically connected to the vacuum sampling pump 2, and the signal output terminal is electrically connected to the gas pump 3, the four-way solenoid valve 7, the dehumidifier 9, the pressure regulating valve 10, and the gas analyzer 12.

[0023] A filter 8 is connected to the outer wall of the four-way solenoid valve 7 away from the heat tracing pipeline 6. A dehumidifier 9 is connected to the end of the filter 8 away from the four-way solenoid valve 7. A pressure regulating valve 10 is connected to the end of the dehumidifier 9 away from the filter 8. A connecting pipe 11 is connected to the end of the pressure regulating valve 10 away from the dehumidifier 9. A gas analyzer 12 is connected to the end of the connecting pipe 11 away from the pressure regulating valve 10 through a flange.

[0024] During operation, the exhaust gas generated by the coke oven enters the chimney 1, which serves as the basic carrier. Before the system starts, the PLC controller 13 first controls the air pump 3 to operate, delivering clean gas into the protective sleeve 14 through the branch pipe 4 and the air supply pipe 5. This performs preliminary purging of the inner wall of the protective sleeve 14 holes and the area around the sampling tube 15, removing residual impurities and moisture to prepare for subsequent sampling. Subsequently, the PLC controller 13 sends a start signal to the three vacuum sampling pumps 2. The three vacuum sampling pumps 2 operate synchronously and generate negative pressure, extracting exhaust gas from different areas inside the chimney 1 through their respective connected sampling tubes 15. At this time, the protective sleeve 14 outside the sampling tube 15 prevents the sampling tube 15 from directly contacting the complex components in the exhaust gas, reducing damage. On the other hand, under the control of the PLC controller 13, the air pump 3 continuously delivers a small amount of clean gas through the branch pipe 4 extending to the inner wall of the protective sleeve 14, intermittently cleaning the impurities adsorbed on the inner wall of the protective sleeve 14, ensuring that the sampling tube 15 always maintains a smooth sampling channel.

[0025] During the exhaust gas extraction process, the vacuum sampling pump 2 transports the collected exhaust gas to the insulated and heated pipeline 6. The insulated and heated pipeline 6 maintains a suitable temperature throughout the process to prevent the condensation of moisture and tar in the high-temperature exhaust gas, avoid pipeline blockage and loss of exhaust gas components due to adsorption, and ensure the integrity and authenticity of the exhaust gas sample during transportation. At the same time, the PLC controller 13 monitors the operating status of the three vacuum sampling pumps 2 in real time through the signal input terminal, such as the operating speed and operating current. Once abnormal parameters are detected, an adjustment signal is immediately issued to ensure the synchronization and stability of multi-point sampling.

[0026] The exhaust gas transported through the heat-tracing pipeline 6 enters the four-way solenoid valve 7. The PLC controller 13 sends a control signal to the four-way solenoid valve 7 according to the preset program. The four-way solenoid valve 7 sequentially and briefly switches each exhaust gas from different sampling points into the common pretreatment system, acquiring exhaust gas samples from all sampling points almost simultaneously in a very short time, thus achieving orderly processing of multi-point samples.

[0027] The exhaust gas first enters filter 8, which filters out impurities such as dust and tar. The clean exhaust gas, after removing impurities, enters dehumidifier 9, which reduces the humidity of the exhaust gas to prevent moisture from damaging subsequent components or affecting detection. The dehumidified exhaust gas then flows into pressure regulating valve 10. According to the working requirements of gas analyzer 12, pressure regulating valve 10 adjusts the exhaust gas pressure to a suitable range to ensure that the exhaust gas enters the subsequent detection stage at a stable pressure. Throughout the pretreatment process, PLC controller 13 monitors the operating parameters of filter 8, dehumidifier 9, and pressure regulating valve 10 in real time, and flexibly adjusts the working status of each component according to the exhaust gas treatment effect to ensure that the quality of the pretreated exhaust gas meets the detection requirements.

[0028] The pretreated exhaust gas is stably delivered to the gas analyzer 12 through the connecting pipe 11. The connecting pipe 11 ensures that the exhaust gas is leak-free and flows stably during the delivery process, providing a continuous sample supply for testing. Under the control of the PLC controller 13, the gas analyzer 12 starts the detection program to detect carbon emission-related indicators in the exhaust gas and outputs the detection data in real time. Since the gas analyzer 12 and the connecting pipe 11 are connected by a flange, subsequent calibration, maintenance or replacement of the gas analyzer 12 can be carried out conveniently, reducing system downtime.

[0029] Throughout the sampling and testing process, the PLC controller 13, as the core control unit, continuously sends control signals to the air pump 3, four-way solenoid valve 7, dehumidifier 9, pressure regulating valve 10, and gas analyzer 12 through its signal output terminal, coordinating the collaborative work of each component. At the same time, it receives the operating status information of the vacuum sampling pump 2 in real time through its signal input terminal, promptly detecting and handling equipment abnormalities. When the system completes a sampling test or needs to be shut down, the PLC controller 13 first controls each sampling and testing component to stop operating, and then controls the air pump 3 to restart. Clean air is delivered to the sampling pipeline 15 and the pretreatment system through the branch pipe 4 and the air delivery pipe 5 for purging, removing residual gas and moisture, protecting the pipeline and equipment, and preparing for the next sampling, thus forming a complete working cycle.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel plant coke oven tail gas carbon emission multi-point simultaneous sampling module, characterized in that, include: A chimney (1) is connected to a vacuum sampling pump (2) through its outer wall. A sampling tube (15) is connected to the outer wall of the vacuum sampling pump (2) inside the chimney (1). A protective sleeve (14) is fitted over the sampling tube (15). An insulated heat tracing pipeline (6) is connected to the outer wall of the vacuum sampling pump (2). A four-way solenoid valve (7) is connected to the end of the insulated heat tracing pipeline (6) away from the vacuum sampling pump (2). A branch pipe (4) is connected to the outer wall of the chimney (1) on one side of the vacuum sampling pump (2). A gas supply pipe (5) is connected to one end of the branch pipe (4). A gas pump (3) is connected to the end of the gas supply pipe (5) away from the branch pipe (4).

2. A coke oven tail gas carbon emission multi-point simultaneous sampling module for a steel plant according to claim 1, characterized in that: The outer wall of the protective sleeve (14) is fixedly connected to the inner wall of the chimney (1), and the end of the branch pipe (4) away from the gas supply pipe (5) extends to the inner wall of the protective sleeve (14). Three vacuum sampling pumps (2) are provided, and a PLC controller (13) is fixedly connected to the outer wall of the chimney (1).

3. A coke oven tail gas carbon emission multi-point simultaneous sampling module for a steel plant according to claim 1, characterized in that: A filter (8) is connected through the outer wall of the four-way solenoid valve (7) away from the heat tracing pipeline (6). A dehumidifier (9) is connected through the end of the filter (8) away from the four-way solenoid valve (7). A pressure regulating valve (10) is connected through the end of the dehumidifier (9) away from the filter (8). A connecting pipe (11) is connected through the end of the pressure regulating valve (10) away from the dehumidifier (9). A gas analyzer (12) is connected through the end of the connecting pipe (11) away from the pressure regulating valve (10) via a flange.

4. The multi-point synchronous sampling module for carbon emissions from coke oven exhaust gas in a steel plant according to claim 2, characterized in that: The signal input terminal of the PLC controller (13) is electrically connected to the vacuum sampling pump (2), and the signal output terminal is electrically connected to the air pump (3), the four-way solenoid valve (7), the dehumidifier (9), the pressure regulating valve (10), and the gas analyzer (12).

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