Multi-point cyclic control online detection and analysis device

Abstract

The utility model discloses a multi-point cyclic control on-line detection and analysis device, which comprises a switching module, a detection module and a control module, wherein each sampling pipeline comprises a sampling device and a first electromagnetic valve, and the plurality of sampling pipelines are converged to one output pipeline; the plurality of sampling devices are arranged at exhaust ports of the plurality of flue gas treatment equipment one by one; the electric control analysis module comprises a high-temperature pump, a pretreatment unit, a three-way pipe, a shunt pipe, a plurality of second electromagnetic valves and a plurality of analyzers which are connected one by one, and an air inlet of the electric control analysis module is connected with an output pipeline of the switching module; an air outlet of the pretreatment unit and an air inlet of the shunt pipe are respectively connected with a first joint and a second joint of a three-way pipe, and a third joint of the three-way pipe is connected with an exhaust pump.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to an online detection and analysis device with multi-point roving control. Background Technology

[0002] Currently, a common approach is to sample exhaust gas near the chimney outlet and measure its concentration using an online analyzer. However, this single-point sampling method cannot effectively reflect the overall concentration of the emitted gas. Furthermore, blockages in the sampling probe or misalignment can lead to significant data inaccuracies, resulting in a biased and limited picture. To address these issues, the processing flow can be divided into zones, with each zone equipped with an online analyzer. The processing plan can then be adjusted based on the data from each zone. However, configuring more analytical units for sampling also means higher investment and heavier maintenance, limiting the application of multi-analytical-unit zone sampling analysis. Single-point sampling analysis of flue gas parameters near the chimney tip yields poor data representativeness, while zone detection requires more analytical units, leading to high engineering investment and heavy equipment maintenance burdens. Utility Model Content

[0003] In view of this, the present invention provides an online detection and analysis device with multi-point cyclic control to solve the problem of insufficient detection schemes for emission exhaust gas concentration in the prior art.

[0004] This utility model embodiment provides an online detection and analysis device with multi-point cyclic control, including:

[0005] The switching module includes several sampling pipelines; each sampling pipeline includes a sampling device and a first solenoid valve, and the several sampling pipelines merge into one output pipeline; the several sampling devices are installed at the exhaust ports of several flue gas treatment devices.

[0006] The electronic control analysis module includes a high-temperature pump, a pretreatment unit, a three-way pipe, a diverter pipe, several second solenoid valves, and several analyzers connected one by one. The air inlet of the electronic control analysis module is connected to the output pipe of the switching module. The air outlet of the pretreatment unit and the air inlet of the diverter pipe are respectively connected to the first and second connectors of the three-way pipe, and the third connector of the three-way pipe is connected to the exhaust pump.

[0007] Optionally, the sampling device includes an air pump, a temperature sensor, a flow sensor, and a pressure sensor.

[0008] Optionally, the high-temperature pump and the pretreatment unit are connected via heat tracing pipes.

[0009] Optionally, the pretreatment unit includes a dust filtration section, a cooling section, and a dehumidification section.

[0010] Optionally, the length of each sampling pipe is less than or equal to 20 meters.

[0011] Optionally, each analyzer is configured to analyze and detect different factors in the sample gas.

[0012] Optionally, at least one second solenoid valve may be opened during a single sample gas detection process.

[0013] Optionally, the electronic control analysis module also includes a zero gas generator, which is connected to each analyzer.

[0014] Optionally, each analyzer is connected to both a hydrogen tank and a standard gas tank.

[0015] The beneficial effects of this utility model are:

[0016] This invention provides a multi-point circulating control online detection and analysis device, employing a one-to-many approach to enable a single detection device to detect multiple sample gases. The multi-point circulating control online detection and analysis device utilizes a confluence of multiple sampling pipelines and a multi-analyzer-based detection method. During measurement, multiple flue gases are drawn by the gas pump of the sampling module, pass through high-temperature heating pipelines and dust filters, and then are switched by solenoid valves to enter analyzers for different analytical factors for measurement. This multi-point circulating control online detection and analysis device can detect flue gas from a single flue gas treatment device individually, or it can switch between multiple flue gas treatment devices via solenoid valve switching, enabling joint detection data analysis. This reduces the construction cost of multi-channel flue gas detection systems, as well as equipment maintenance costs and difficulties. Attached Figure Description

[0017] The features and advantages of this utility model will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the utility model in any way. In the drawings:

[0018] Figure 1 This diagram shows a structural diagram of an online detection and analysis device with multi-point cyclic control according to an embodiment of the present invention;

[0019] Figure 2 This diagram illustrates the gas flow direction under the intake detection and analysis state of an online detection and analysis device with multi-point cyclic control in an embodiment of the present invention.

[0020] Figure 3 This diagram illustrates the gas flow direction under exhaust conditions in an online detection and analysis device with multi-point cyclic control, according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] This utility model embodiment provides an online detection and analysis device with multi-point cyclic control, such as... Figure 1 As shown, the system includes a switching module and an electronic control analysis module. The switching module includes several sampling pipelines. Each sampling pipeline includes a sampling device and a first solenoid valve. The several sampling pipelines merge into an output pipeline. The sampling devices are installed at the exhaust ports of several flue gas treatment devices. The electronic control analysis module includes a high-temperature pump, a pretreatment unit, a tee pipe, a diverter pipe, several second solenoid valves, and several analyzers, all connected in series. The inlet of the electronic control analysis module is connected to the output pipeline of the switching module. The outlet of the pretreatment unit and the inlet of the diverter pipe are connected to the first and second connectors of the tee pipe, respectively. The third connector of the tee pipe is connected to the exhaust pump.

[0023] In a specific implementation, the switching module is equipped with N sampling pipelines, and the electrical control analysis module is equipped with multiple analyzers.

[0024] As an optional implementation, the sampling device includes an air pump, a temperature sensor, a flow sensor, and a pressure sensor.

[0025] In this embodiment, when performing sample gas testing on a certain exhaust port, the first solenoid valve of the corresponding sampling pipeline is opened, the air pump of the sampling device is turned on, the sample gas of the exhaust gas is obtained, the sample gas is pumped into the pipeline, and the sampling device detects the temperature, pressure and flow rate of the sample gas.

[0026] As an optional implementation, the high-temperature pump and the pretreatment unit are connected via heat tracing pipes.

[0027] In this embodiment, a high-temperature pump heats the sample gas, and the temperature of the sample gas is kept stable through a heat tracing pipeline to prevent condensation of the sample gas in a low-temperature environment, thereby ensuring the normal operation of the pipeline.

[0028] As an optional implementation, the pretreatment unit includes a dust filtration section, a cooling section, and a dehumidification section.

[0029] In this embodiment, the sample gas is filtered for dust, cooled, and dehumidified by a pretreatment unit.

[0030] As an optional implementation, the length of each sampling pipe is less than or equal to 20 meters.

[0031] In this embodiment, the installation location of the online detection and analysis device with multi-point roving control needs to ensure that the length of each sampling pipeline is within 20 meters. When switching pipelines for detection, the control design for opening and closing of each solenoid valve can be simplified.

[0032] As an optional implementation, each analyzer is configured to analyze and detect different factors in the sample gas.

[0033] In this embodiment, the analyzer is capable of analyzing CO2, CO, and NO in flue gas. x The analysis and measurement of flue gas contents such as SO2 are fully displayed. Each analyzer is set to detect a specific factor in the sample gas, so in practical applications, there is no need to further configure the analyzers.

[0034] As an optional implementation, at least one second solenoid valve may be opened during a single sample gas detection process.

[0035] In this embodiment, the second solenoid valve corresponding to the analyzer that detects a certain factor is opened according to actual needs to achieve directional detection.

[0036] As an optional implementation, the electronically controlled analysis module also includes a zero gas generator connected to each analyzer.

[0037] As an optional implementation, each analyzer is connected to both a hydrogen tank and a standard gas tank.

[0038] In this embodiment, hydrogen and standard gas are manually and periodically introduced into the analyzer for calibration.

[0039] like Figure 2 As shown, the intake air analysis and detection process of the online detection and analysis device with multi-point cyclic control is as follows:

[0040] To test the flue gas emitted by a certain flue gas treatment device, the first solenoid valve of the corresponding sampling pipeline and the air pump of the sampling device are opened. The sample gas enters the electronic control analysis module through the sampling pipeline, is heated by a high-temperature pump, and is insulated by a heat tracing pipeline. It then passes through a pretreatment unit for dust filtration, cooling and dehumidification. After passing through the high-temperature pump, the sample gas is under a slight positive pressure. Part of it enters the analyzer and is analyzed and measured by the analysis system, while the other part is discharged through the bypass exhaust pump connected to the three-way pipe.

[0041] like Figure 3 As shown, the exhaust process of the online detection and analysis device with multi-point cyclic control is as follows:

[0042] After the sample gas analysis is completed, the first solenoid valve is closed, the high-temperature pump and pretreatment unit stop working, the exhaust pump is turned on, the zero gas generator is turned on, clean compressed gas is generated, the compressed gas pump in the zero gas generator starts backflushing, the clean gas enters the analyzer, the analyzer enters the reset process, the sample gas in the pipeline is discharged through the exhaust pump pipeline, when the analyzer has completed the reset, the zero gas generator is turned off, the exhaust pump is turned off, the corresponding second solenoid valve is turned off, and the analyzer waits for the next sample gas analysis.

[0043] This invention provides a multi-point circulating control online detection and analysis device, employing a one-to-many approach to enable a single detection device to detect multiple sample gases. The multi-point circulating control online detection and analysis device utilizes a confluence of multiple sampling pipelines and a multi-analyzer-based detection method. During measurement, multiple flue gases are drawn by the gas pump of the sampling module, pass through high-temperature heating pipelines and dust filters, and then are switched by solenoid valves to enter analyzers for different analytical factors for measurement. This multi-point circulating control online detection and analysis device can detect flue gas from a single flue gas treatment device individually, or it can switch between multiple flue gas treatment devices via solenoid valve switching, enabling joint detection data analysis. This reduces the construction cost of multi-channel flue gas detection systems, as well as equipment maintenance costs and difficulties.

[0044] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An online detection and analysis device with multi-point cyclic control, characterized in that, include: The switching module includes several sampling pipelines; each sampling pipeline includes a sampling device and a first solenoid valve, and the several sampling pipelines merge into one output pipeline; the several sampling devices are installed at the exhaust ports of several flue gas treatment devices. The electronically controlled analysis module includes a high-temperature pump, a pretreatment unit, a three-way pipe, a diverter pipe, several second solenoid valves, and several analyzers connected one by one. The air inlet of the electronically controlled analysis module is connected to the output pipe of the switching module. The air outlet of the pretreatment unit and the air inlet of the diverter pipe are respectively connected to the first and second connectors of the three-way pipe, and the third connector of the three-way pipe is connected to the exhaust pump.

2. The online detection and analysis device for multi-point cyclic control according to claim 1, characterized in that, The sampling device includes an air pump, a temperature sensor, a flow sensor, and a pressure sensor.

3. The online detection and analysis device for multi-point cyclic control according to claim 1, characterized in that, The high-temperature pump and the pretreatment unit are connected by a heat tracing pipe.

4. The online detection and analysis device for multi-point cyclic control according to claim 1, characterized in that, The pretreatment unit includes a dust filtration section, a cooling section, and a dehumidification section.

5. The online detection and analysis device for multi-point cyclic control according to claim 1, characterized in that, Each of the sampling pipes is less than or equal to 20 meters in length.

6. The online detection and analysis device for multi-point cyclic control according to claim 1, characterized in that, Each of the analyzers is configured to analyze and detect different factors in the sample gas.

7. The online detection and analysis device for multi-point cyclic control according to claim 6, characterized in that, During a single sample gas detection process, at least one of the second solenoid valves shall be opened.

8. The online detection and analysis device for multi-point cyclic control according to claim 1, characterized in that, The electronically controlled analysis module also includes a zero gas generator, which is connected to each of the analyzers.

9. The online detection and analysis device for multi-point cyclic control according to claim 1, characterized in that, Each of the analyzers is connected to a hydrogen gas cylinder and a standard gas cylinder, respectively.

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