Multi-stage alarm flue gas monitoring system

Abstract

The utility model relates to a multistage alarm flue gas monitoring system which comprises a control module, a man-machine interaction module and a monitoring module. The temperature sensors and the flow sensors are arranged, the humidity sensors are arranged in front of and behind the dehydration device to monitor the dehumidification effect of the dehydration device, and the temperature sensors are arranged in front of and behind the heat tracing unit to monitor the temperature control effect of the heat tracing unit, so that the humidity and the temperature of flue gas entering the detector are ensured to be within a suitable range; the smoke monitoring is prevented from being influenced, the smoke is early warned through the detector, the dehumidification and temperature control effects are early warned, and the faults of the temperature and humidity sensors are early warned through mutual monitoring and comparison of the plurality of temperature and humidity sensors. Faults of the dewatering device, the heat tracing unit and the temperature and humidity sensor can be predicted and monitored in advance, and the phenomenon that the detector is affected due to insufficient dewatering capacity is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas monitoring, specifically relating to a multi-level alarm flue gas monitoring system. Background Technology

[0002] A flue gas early warning system is a safety device used to monitor the concentration of flue gas in a flue gas passage in real time and issue an alarm in a timely manner. It is widely used in industries, construction, public safety and other fields.

[0003] Existing flue gas analysis systems (such as CEMS and process analysis systems) generally suffer from the following technical defects in their pretreatment units: They have a single alarm mechanism; traditional systems often use a single threshold alarm (such as temperature exceeding limits or flow abnormalities), lack a graded early warning mechanism, cannot distinguish the severity of faults, and are prone to false alarms or missed alarms; they lack the ability to predict potential risks and have insufficient monitoring of dehumidification capacity, which leads to condensation in high-humidity flue gas, corroding sensors or clogging pipelines. Utility Model Content

[0004] The purpose of this invention is to provide a multi-level alarm flue gas monitoring system to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A multi-level alarm flue gas monitoring system includes a control module, a human-machine interface module, and a monitoring module. The control module is electrically connected to both the monitoring module and the human-machine interface module. The monitoring module includes a parameter monitoring module and a sampling unit. The sampling unit includes a dehydration device for dehydrating the flue gas, a heat tracing unit for controlling the sampling temperature, a sampling device for sampling the flue gas, and a detector for monitoring the concentration of the sampled flue gas. The parameter monitoring module includes a flow sensor for monitoring the flue gas flow rate, a temperature sensor for monitoring the flue gas emission temperature and the temperatures before and after the heat tracing unit, and a humidity sensor for monitoring the flue gas emission humidity and the humidity before and after the dehydration device.

[0007] As a further optimization of this utility model, the communication interface of the control module includes 4G, 5G, and WIFI, with strong compatibility among multiple interfaces.

[0008] As a further optimization of this utility model, the human-machine interaction module includes an industrial touch screen electrically connected to the control module, an alarm module electrically connected to the industrial touch screen, a parameter setting module, and a data storage and display module. The parameter setting module is used to set various warning thresholds, and the alarm module is used to trigger an alarm when various data reach the warning thresholds. Setting up a human-machine interaction module facilitates operations such as alarming, setting warning thresholds, and data visualization.

[0009] As a further optimization of this utility model, the control module and the sampling unit are connected by a relay.

[0010] As a further optimization of this utility model, the sampling unit also includes a backflushing device for discharging the flue gas detected by the detector. The backflushing device is existing technology, which controls a relay through a controller, and then the backflushing is controlled by the relay.

[0011] As a further optimization of this utility model, the dehydration device includes a multi-stage condensation device connected in series, wherein each stage of the condensation device includes a refrigeration device and a condenser tube. The refrigeration device includes a semiconductor refrigeration device and a compressor refrigeration device. By setting a dual condenser series structure, the front stage uses semiconductor refrigeration for rapid cooling, and the rear stage uses compressor refrigeration for deep dehydration.

[0012] As a further optimization of this utility model, the outer surface of the condenser tube is coated with a hydrophobic material, and a nano-hydrophobic coating pipeline is added to suppress condensate residue. After the condensate is discharged, the adsorbed dust can also be carried out, reducing the impact on the subsequent condensation effect.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1) This utility model ensures that the humidity and temperature of the flue gas entering the detector are within a suitable range by setting multiple temperature sensors and flow sensors, setting humidity sensors before and after the dehydration device to monitor the dehumidification effect of the dehydration device, and setting temperature sensors before and after the heat tracing unit to monitor the temperature control effect of the heat tracing unit, thereby preventing the flue gas monitoring from being affected.

[0015] 2) This utility model provides early warning of flue gas emissions and dehumidification and temperature control effects through a detector. It also provides early warning of malfunctions of the temperature and humidity sensors by setting up multiple temperature and humidity sensors for mutual monitoring and comparison. It has the function of early warning of malfunctions of the dehydration device, the heating unit, and the temperature and humidity sensors, thus preventing insufficient dehydration capacity from affecting the detector. Attached Figure Description

[0016] Figure 1 This is a system schematic diagram of this utility model. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1

[0019] like Figure 1 As shown, a multi-level alarm flue gas monitoring system includes a control module, a human-machine interface module, and a monitoring module. The control module is electrically connected to both the monitoring module and the human-machine interface module. The monitoring module includes a parameter monitoring module and a sampling unit. The sampling unit includes a dehydration device for dehydrating the flue gas, a heat tracing unit for controlling the sampling temperature, a sampling device for sampling the flue gas, and a detector for monitoring the concentration of the sampled flue gas. The parameter monitoring module includes a flow sensor for monitoring the flue gas flow rate, a temperature sensor for monitoring the flue gas emission temperature and the temperatures before and after the heat tracing unit, and a humidity sensor for monitoring the flue gas emission humidity and the humidity before and after the dehydration device.

[0020] The control module is a PLC controller, and the model can be Siemens S7 series. The detector can be selected according to the detection requirements. In this embodiment, Siemens U23 is selected. The temperature sensor and humidity sensor can be single sensors or multi-functional temperature and humidity sensors.

[0021] This solution monitors the dehumidification effect of the dehydration device by setting up multiple temperature and flow sensors, and humidity sensors before and after the dehydration device.

[0022] Temperature sensors are installed before and after the heat tracing unit to monitor the temperature control effect of the heat tracing unit, ensuring that the humidity and temperature of the flue gas entering the detector are within a suitable range, and preventing any impact on flue gas monitoring.

[0023] The instrument provides early warnings for flue gas emissions and dehumidification and temperature control effects. It also uses multiple temperature and humidity sensors to monitor and compare each other, providing early warnings for sensor malfunctions. It has the function of predicting and monitoring malfunctions of dehydration devices, heating units, and temperature and humidity sensors in advance, preventing insufficient dehydration capacity from affecting the instrument. It provides multi-level alarms for excessive flue gas concentration, equipment malfunctions, and sensor malfunctions.

[0024] The flue gas monitoring system also includes a cloud platform, which is electrically connected to the control module. The communication interfaces of the control module include 4G, 5G, and WIFI. By setting up the cloud platform, it is easy to link with the plant-level monitoring platform and cloud management system. The alarm historical data stored in the cloud can be used to optimize process parameters and reduce the risk of enterprises exceeding environmental protection standards.

[0025] The human-machine interaction module includes an industrial touch screen electrically connected to the control module, an alarm module electrically connected to the industrial touch screen, a parameter setting module, and a data storage and display module. The parameter setting module is used to set various early warning thresholds, and the alarm module is used to trigger an alarm when various data reach the early warning threshold. By setting the human-machine interaction module, it is convenient to perform operations such as alarm, early warning threshold setting, and data visualization. Dynamic threshold adjustment makes the system compatible with complex flue gas conditions in multiple industries such as coal combustion, waste incineration, and chemical industry.

[0026] The control module is electrically connected to the human-machine interface module via Ethernet. It can be electrically connected to the DCS system via point-to-point, Ethernet, or DP. It is connected to the sampling unit via a relay. This solution is used to propose feasible electrical connection methods. It should be noted that in the sampling unit, the detector can communicate with the detector by point-to-point, Ethernet, or DP when feeding back the detection results.

[0027] The sampling unit also includes a backflushing device, which is used to discharge the flue gas detected by the detector. The backflushing device is existing technology, which is controlled by a controller and then controlled by the relay to perform backflushing.

[0028] The dehydration device includes a multi-stage condensing device connected in series. Each stage of the condensing device includes a refrigeration unit and a condenser tube. The refrigeration unit includes a semiconductor refrigeration unit and a compressor refrigeration unit. By setting a dual condenser series structure, the front stage uses semiconductor refrigeration for rapid cooling, and the rear stage uses compressor refrigeration for deep dehydration.

[0029] The outer surface of the condenser tube is coated with a hydrophobic material, and a nano-hydrophobic coating is added to the pipeline to suppress condensate residue. After the condensate is discharged, it can also carry away the adsorbed dust, reducing the impact on the subsequent condensation effect.

[0030] Specific implementation method: The parameter monitoring module detects relevant parameters such as temperature, humidity, and flow rate. When each data reaches the warning threshold, the control module controls the human-machine interaction module to issue an alarm. The dehydration efficiency of the dehydration device is determined by the humidity difference before and after the dehydration device. This process can also monitor the lifespan of the dehydration device by setting the humidity at the back end of the dehydration device. An alarm is triggered when the humidity exceeds the threshold. Similarly, the temperature before and after the heating unit is measured, and an alarm is triggered when the temperature of the heating unit is abnormal. This keeps the temperature of the flue gas entering the detector stable and prevents the temperature difference from affecting the detection results. The detector issues an alarm when the flue gas concentration reaches the threshold. Different temperature and humidity sensors compare temperature and humidity to prevent sensor failure. An alarm is also triggered when the difference reaches the threshold. This difference threshold can be set based on historical data and experience. It should be noted that the method of setting temperature and humidity alarm thresholds is existing technology.

[0031] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A multi-level alarm flue gas monitoring system, comprising a control module, a human-machine interface module, and a monitoring module, wherein the control module is electrically connected to both the monitoring module and the human-machine interface module, characterized in that: The monitoring module includes a parameter monitoring module and a sampling unit. The sampling unit includes a dehydration device for dehydrating flue gas, a heat tracing unit for controlling the sampling temperature, a sampling device for sampling flue gas, and a detector for monitoring the concentration of the sampled flue gas. The parameter monitoring module includes a flow sensor for monitoring flue gas flow rate, a temperature sensor for monitoring flue gas emission temperature and the temperature before and after the heat tracing unit, and a humidity sensor for monitoring flue gas emission humidity and the humidity before and after the dehydration device.

2. The multi-level alarm flue gas monitoring system according to claim 1, characterized in that: The communication interfaces of the control module include 4G, 5G, and WIFI.

3. The multi-level alarm flue gas monitoring system according to claim 1, characterized in that: The human-machine interaction module includes an industrial touch screen electrically connected to the control module, an alarm module electrically connected to the industrial touch screen, a parameter setting module, and a data storage and display module. The parameter setting module is used to set various warning thresholds, and the alarm module is used to trigger an alarm when various data reach the warning thresholds.

4. The multi-level alarm flue gas monitoring system according to claim 3, characterized in that: The control module and the sampling unit are connected via a relay.

5. The multi-level alarm flue gas monitoring system according to claim 1, characterized in that: The sampling unit also includes a backflushing device for discharging the flue gas detected by the detector.

6. The multi-level alarm flue gas monitoring system according to claim 1, characterized in that: The dehydration device includes a multi-stage condensing device connected in series, wherein each stage of the condensing device includes a refrigeration device and a condenser tube, and the refrigeration device includes a semiconductor refrigeration device and a compressor refrigeration device.

7. The multi-level alarm flue gas monitoring system according to claim 6, characterized in that: The outer surface of the condenser tube is coated with a hydrophobic material.

Images