Monitoring system for boiler flue gas desulfurization wastewater recovery

Abstract

The present invention relates to the field of desulfurization wastewater monitoring methods, and specifically to a monitoring system for boiler flue gas desulfurization wastewater recovery, comprising a plurality of flow detection modules, a processing module, and an early warning module; the processing module first determines the type of electric valve after receiving an operation signal, and determines the operation delay time of the electric valve according to the electric valve type; the processing module obtains the real-time flow rate when receiving the operation signal, the intermediate flow rate after the operation delay time, and the subsequent flow rate after the delay time plus a preset time difference from each flow detection module; the processing module determines whether there is a current abnormality of the electric valve based on whether the real-time flow rate and the intermediate flow rate are equal; when the real-time flow rate and the intermediate flow rate are equal, the processing module determines the size of the intermediate flow rate and the subsequent flow rate based on whether the operation signal increases or decreases the flow rate, so as to determine whether the reaction result after the electric valve adjustment is consistent with the operation result. The present invention can accurately distinguish the abnormality of the electric valve before the electric valve automatically operates due to the abnormality, and detect the abnormality in advance.

Description

Technical Field

[0001] The present invention relates to the field of desulfurization wastewater monitoring methods, and in particular to a monitoring system for recycling boiler flue gas desulfurization wastewater. Background Art

[0002] Desulfurization wastewater is the discharge water from the absorption tower during the wet desulfurization process of boiler flue gas in power plants. Because desulfurization wastewater contains a large amount of suspended solids, supersaturated sulfites, sulfates, heavy metals and other impurities, the recovery of desulfurization wastewater is related to the environmental protection requirements of power generation.

[0003] Desulfurization wastewater is recovered by adding a certain amount of lime slurry and continuously stirring it, so that its pH value can be raised from about 5.5 to above 9.0; heavy metal sedimentation agent, the addition of heavy metal precipitate Ca(OH)2 not only increases the pH value of the wastewater, but also causes heavy metal ions such as Fe3+, Zn2+, Cu2+, Ni2+, Cr3+ to form hydroxide precipitates; after the flocculation reaction and chemical precipitation reaction, the wastewater still contains many small and dispersed particles and colloidal substances, so a certain proportion of flocculant FeClSO4 is added to the third compartment to make them condense into large particles and settle down, and cationic polymer electrolytes are added at the outlet of the wastewater reaction tank as a coagulant to reduce the surface tension of the particles and enhance the particle growth process; concentration / clarification The flocculated wastewater overflows from the reaction tank into the clarification / concentration tank equipped with a stirrer, the flocculants are deposited at the bottom and concentrated into sludge by gravity, and the upper part is clear water. During the desulfurization wastewater treatment process, it passes through the wastewater tank, wastewater lifting pump, pH neutralized wastewater buffer tank, sedimentation tank, flocculation tank, clarifier, outlet tank, outlet pump, and meets the discharge standards. The main equipment in the desulfurization wastewater recovery process is the integrated treatment equipment formed by the wastewater lifting pump, wastewater buffer tank, sedimentation tank for sedimentation, flocculation tank, clarifier, sludge tank and electric valves installed at each node.

[0004] To ensure the safe and stable operation of each device in the desulfurization wastewater recovery process, fault start-stop logic is currently implemented for each device. For example, when an abnormal signal is received from an electric valve, the electric valve is controlled to stop. However, existing fault start-stop operations are performed after the fact, and fault monitoring is delayed. During the desulfurization wastewater recovery process, production safety requires timely monitoring of each treatment device for faults. Summary of the Invention

[0005] The present invention aims to provide a monitoring system for boiler flue gas desulfurization wastewater recovery to solve the problem of delayed fault monitoring during the desulfurization wastewater recovery process.

[0006] The monitoring system for boiler flue gas desulfurization wastewater recovery in this solution includes several flow detection modules located in each overflow channel of the integrated treatment equipment, a processing module that can receive the operation signals of each electric valve, and an early warning module that provides fault warning prompts;

[0007] After receiving the operation signal, the processing module first determines the type of the electric valve, and determines the operation delay time of the electric valve according to the type of the electric valve;

[0008] The processing module obtains the real-time flow rate when receiving the operation signal, the intermediate flow rate after the operation delay time, and the subsequent flow rate after the delay time plus a preset time difference from each flow detection module. The processing module determines whether the real-time flow rate and the intermediate flow rate are equal for each flow detection module. If the real-time flow rate and the intermediate flow rate of all detection modules are equal, it is determined that there is no abnormality in the electric valve. When the real-time flow rate and the intermediate flow rate of any detection module are not equal, it is determined that the electric valve is currently abnormal.

[0009] When the real-time flow rate is equal to the intermediate flow rate, the processing module determines the size of the intermediate flow rate and the subsequent flow rate according to the operation signal to increase or decrease the flow rate to determine whether the reaction result after the electric valve adjustment is consistent with the operation result. When the reaction result after the electric valve adjustment is consistent with the operation result, the electric valve action is normal. When the reaction result after the electric valve adjustment is inconsistent with the operation result, the electric valve action is abnormal.

[0010] Compared with the existing technology, the beneficial effects of this solution are:

[0011] By judging the type of the operation signal of each electric valve in the desulfurization wastewater recovery process, and then determining the delay time according to the electric valve type, the flow of each overflow channel at different time nodes is obtained according to the delay time, and the flow at each time node is compared to judge the abnormality of the electric valve. For example, by judging the real-time flow and the intermediate flow, it can be determined whether the electric valve currently has some abnormality automatically generated due to uncontrolled operation. At the same time, the increase or decrease represented by the operation signal is judged to further judge the abnormal operation of the electric valve. For example, based on the judgment of the intermediate flow and the subsequent flow, it can be determined that the electric valve has an abnormality in the early action after being controlled, such as being unable to perform the control action due to interference from external obstacles, or the action after the control action is not in place to achieve the control purpose. The abnormality of the electric valve can be accurately distinguished before the electric valve automatically acts due to the abnormality, and the abnormality is discovered in advance.

[0012] Furthermore, when the operation signal is to increase the flow rate, the processing module determines whether the intermediate flow rate of any detection module is less than the subsequent flow rate. If the intermediate flow rate is less than the subsequent flow rate, the electric valve operates normally, and it is determined that the reaction result after the electric valve adjustment is consistent with the operation result. If the intermediate flow rate is greater than or equal to the subsequent flow rate, the electric valve operates abnormally, and it is determined that the reaction result after the electric valve adjustment is inconsistent with the operation result.

[0013] When the operation signal is to reduce the flow, the processing module determines whether the intermediate flow of any detection module is greater than the subsequent flow. If the intermediate flow is greater than the subsequent flow, the electric valve operates normally, and it is determined that the reaction result after the electric valve is adjusted is consistent with the operation result. If the intermediate flow is less than or equal to the subsequent flow, the electric valve operates abnormally, and it is determined that the reaction result after the electric valve is adjusted is inconsistent with the operation result.

[0014] The beneficial effect is that whether the electric valve is abnormal is judged based on the flow rate after operation, and the specific stage of the abnormal operation of the electric valve can be found intuitively and accurately, so that corresponding processing and maintenance can be carried out according to the abnormality of the electric valve.

[0015] Furthermore, when the electric valve operates abnormally, the processing module determines the detection position of the flow detection module corresponding to the mark in the rear flow, and determines the blockage probability of the overflow channel based on the detection position. The processing module compares the blockage probability with the threshold. When the blockage probability is greater than the threshold, the processing module corrects the abnormal operation of the electric valve to pending. When the blockage probability is less than the threshold, the processing module determines that the electric valve operates abnormally.

[0016] The beneficial effect is: after determining that the electric valve is operating abnormally, the blockage probability of the overflow channel between the devices is determined, and the judgment result of the electric valve operating abnormality is corrected based on the blockage probability, and the multi-layer judgment logic prevents misjudgment.

[0017] Further, when the correction of the abnormal operation of the electric valve is pending, the processing module obtains the dosing signal of the dosing device at the water inlet end of the integrated treatment equipment, and determines whether the dosing signal is an increase. If the dosing signal is an increase, the processing module determines that there is no abnormality in the operation of the electric valve.

[0018] The beneficial effect is that after the abnormal operation of the electric valve is corrected to be pending, the drug adding signal is judged for confirmation, thereby ensuring the accuracy of the judgment of the abnormal operation of the electric valve.

[0019] Furthermore, if the drug adding signal indicates a decreasing amount, the processing module determines that the electric valve is operating abnormally.

[0020] The beneficial effect is that when the dosing signal is a decreasing amount, it indicates that the abnormal flow change is not caused by the increase in the dosing amount causing the increase in sediment. At this time, the result of determining that the electric valve is abnormal is accurate.

[0021] Furthermore, when determining the blockage probability of the overflow channel based on the detection position, the processing module determines the front-rear position of the electric valve relative to the integrated treatment equipment. When the electric valve is located at the water inlet end of the integrated treatment equipment and the operation signal is to increase the flow rate, the processing module determines that the blockage probability is 70% based on the detection position being close to the water inlet end of the integrated treatment equipment, 60% based on the detection position being at the center of the integrated treatment equipment, and 45% based on the detection position being away from the water inlet end of the integrated treatment equipment.

[0022] When the electric valve is located at the water inlet end of the integrated treatment equipment and the operation signal is to reduce the flow rate, the processing module judges that the blockage probability is 40% based on the detection position being close to the water inlet end of the integrated treatment equipment, judges that the blockage probability is 55% based on the detection position being located at the center of the integrated treatment equipment, and judges that the blockage probability is 35% based on the detection position being far from the water inlet end of the integrated treatment equipment.

[0023] The beneficial effect is: according to the detection position relative to the integrated treatment equipment and the operation signal to increase or decrease the flow, for example, the electric valve at the water inlet, the blockage probability at different detection positions is judged, and it can be accurately confirmed whether the flow change is caused by the increase or decrease of sediment caused by the desulfurization wastewater treatment, thereby improving the accuracy of electric valve fault judgment.

[0024] Furthermore, when the electric valve is located at the water outlet of the integrated treatment equipment and the operation signal is to increase the flow rate, the processing module determines that the blockage probability is 55% based on the detection position being close to the water inlet of the integrated treatment equipment, determines that the blockage probability is 50% based on the detection position being located at the center of the integrated treatment equipment, and determines that the blockage probability is 30% based on the detection position being far from the water inlet of the integrated treatment equipment;

[0025] When the electric valve is located at the water outlet of the integrated treatment equipment and the operation signal is to reduce the flow rate, the processing module judges that the blockage probability is 30% based on the detection position being close to the water inlet of the integrated treatment equipment, judges that the blockage probability is 45% based on the detection position being located at the center of the integrated treatment equipment, and judges that the blockage probability is 25% based on the detection position being far from the water inlet of the integrated treatment equipment.

[0026] The beneficial effect is: according to the electric valve located at the rear end of the integrated processing equipment, for example, the electric valve for drainage is used to discharge the clean water after sedimentation. Some solid matter has been deposited in the integrated processing equipment, and the probability of blockage is much lower, so the judgment of electric valve failure is more accurate.

[0027] Furthermore, when there is no abnormality in the operation of the electric valve, the processing module obtains the liquid level height from the liquid level sensor of the sludge tank and determines whether the liquid level height is greater than the warning value. When the liquid level height is greater than the warning value, the processing module records the abnormality and sends a highlighted display information to the early warning module.

[0028] The beneficial effect is that when the electric valve operates normally, the liquid level height of the sludge tank is judged; when the liquid level height is high, a prominent warning is displayed, which facilitates the precise control of the electric valve.

[0029] Furthermore, when the electric valve operation is abnormal and is pending, the processing module sends a flashing display message to the early warning module; when the electric valve is currently abnormal, the processing module sends a sound abnormality message to the early warning module; when the electric valve operation is abnormal, the processing module sends a high-decibel sound abnormality message to the early warning module.

[0030] The beneficial effect is: different levels of abnormal situations are graded to provide early warning prompts, which facilitates the timely and rapid detection of different abnormalities and improves the response speed of subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of an embodiment of a monitoring system for recycling boiler flue gas desulfurization wastewater according to the present invention. DETAILED DESCRIPTION

[0032] The following is further explained in detail through specific implementation methods.

[0033] Example

[0034] Monitoring system for boiler flue gas desulfurization wastewater recovery, such as Figure 1 As shown, the integrated treatment equipment includes several flow detection modules located in each overflow channel within the equipment, a processing module that receives operating signals from each electric valve, and an early warning module that issues fault warnings. The flow detection module signals are connected to the processing module. The flow detection module can use an existing flow meter, and the processing module can use an existing PC. The integrated treatment equipment consists of three boxes with overflow channels between them, which overflow from bottom to top. These three boxes sequentially perform the functions of a settling tank, a flocculation tank, and a clarifier. Water enters from the top of one side of each box and overflows from the bottom of the other side.

[0035] After receiving the operation signal, the processing module first determines the type of electric valve and determines the operation delay time of the electric valve based on the electric valve type. The electric valve type is set according to different equipment and different numbers of pumps. For example, the operation signal delay time for disconnecting the electric valve of pump 1# among multiple pumps in a power plant is 2s.

[0036] The processing module obtains the real-time flow rate when receiving the operation signal, the intermediate flow rate after the operation delay time, and the subsequent flow rate after the delay time plus the preset time difference from each flow detection module. The preset time difference is set according to the time it takes for the wastewater flow to flow to each flow monitoring point after the change. The processing module determines whether the real-time flow rate and the intermediate flow rate are equal for each flow detection module. If the real-time flow rate and the intermediate flow rate of all detection modules are equal, it is determined that there is no abnormality in the electric valve. When the real-time flow rate and the intermediate flow rate of any detection module are not equal, it is determined that the electric valve is currently abnormal. The current abnormality of the electric valve is a completely uncontrolled abnormality.

[0037] When the real-time flow is equal to the intermediate flow, the processing module determines the size of the intermediate flow and the subsequent flow according to the operation signal to increase or decrease the flow, so as to determine whether the reaction result after the electric valve adjustment is consistent with the operation result. When the reaction result after the electric valve adjustment is consistent with the operation result, the electric valve action is normal. When the reaction result after the electric valve adjustment is inconsistent with the operation result, the electric valve action is abnormal. The abnormal action of the electric valve means that the electric valve can perform certain actions according to the control operation, but the action is not in place.

[0038] When the operation signal is to increase the flow rate, the processing module determines whether the intermediate flow rate of any detection module is less than the subsequent flow rate. If the intermediate flow rate is less than the subsequent flow rate, the electric valve action is normal, and it is determined that the reaction result after the electric valve adjustment is consistent with the operation result. If the intermediate flow rate is greater than or equal to the subsequent flow rate, the electric valve action is abnormal, and it is determined that the reaction result after the electric valve adjustment is inconsistent with the operation result.

[0039] When the operation signal is to reduce the flow, the processing module determines whether the intermediate flow of any detection module is greater than the subsequent flow. If the intermediate flow is greater than the subsequent flow, the electric valve operates normally, and it is determined that the reaction result after the electric valve is adjusted is consistent with the operation result. If the intermediate flow is less than or equal to the subsequent flow, the electric valve operates abnormally, and it is determined that the reaction result after the electric valve is adjusted is inconsistent with the operation result.

[0040] When the electric valve operates abnormally, the processing module will determine the detection position of the flow detection module corresponding to the mark in the post-flow, and determine the blockage probability of the overflow channel according to the detection position. The blockage probability is determined according to the position of the overflow channel and whether the dosing signal causes an increase or decrease in the amount of precipitation. The processing module compares the blockage probability with the threshold value. The threshold value is set according to the actual pollution level of the desulfurization wastewater. The higher the pollution level, the more solid matter may be formed during treatment. When the pollution level is high, the threshold value is 45%, when the pollution level is medium, the threshold value is 50%, and when the pollution level is low, the threshold value is 55%. When the blockage probability is greater than the threshold value, the processing module corrects the abnormal operation of the electric valve to pending. When the blockage probability is less than the threshold value, the processing module determines that the electric valve operation is abnormal.

[0041] When judging the blockage probability of the overflow channel according to the detection position, the processing module judges the front and rear positions of the electric valve relative to the integrated treatment equipment, and the front and rear positions include the water inlet end in front of the electric valve and the water outlet end behind the integrated treatment equipment. When the electric valve is located at the water inlet end of the integrated treatment equipment and the operation signal is to increase the flow rate, the processing module judges that the blockage probability is 70% based on the detection position being close to the water inlet end of the integrated treatment equipment, that is, there is a great possibility that the blockage is caused by the increase in sediment after the increase in water inlet. The blockage probability is judged to be 60% based on the detection position being located at the center of the integrated treatment equipment, that is, there is a very high possibility that the blockage is caused by more sedimentation in the integrated treatment equipment due to the increase in water inlet. The blockage probability is judged to be 45% based on the detection position being far from the water inlet end of the integrated treatment equipment, that is, there is a certain possibility that there is blockage at the end after sedimentation in the integrated equipment for a period of time.

[0042] When the electric valve is located at the water inlet end of the integrated treatment equipment and the operation signal is to reduce the flow rate, the processing module judges that the blockage probability is 40% based on the detection position being close to the water inlet end of the integrated treatment equipment, that is, there is a certain possibility of blockage at the front end of the integrated treatment equipment after the water inlet is reduced. The blockage probability is judged to be 55% based on the detection position being located at the center of the integrated treatment equipment, that is, there is a high possibility that the wastewater in the integrated treatment equipment will come into more complete contact with the reagent after the flow rate is reduced to produce solid matter and cause blockage. The blockage probability is judged to be 35% based on the detection position being far away from the water inlet end of the integrated treatment equipment, that is, after the flow rate is reduced, the rear end will basically not be blocked after the previous sedimentation treatment.

[0043] When the electric valve is located at the outlet of the integrated treatment equipment and the operation signal is to increase the flow rate, the processing module judges that the blockage probability is 55% based on the detection position being close to the water inlet of the integrated treatment equipment, that is, when the outlet accelerates drainage, there is a greater possibility of blockage due to the large amount of solid matter formed by the reaction at the water inlet of the integrated treatment equipment. According to the detection position being located at the center of the integrated treatment equipment, the blockage probability is judged to be 50%, that is, there is a greater probability of blockage due to the large amount of solid matter formed by the reaction inside the integrated treatment equipment when accelerating drainage. According to the detection position being far away from the water inlet of the integrated treatment equipment, the blockage probability is judged to be 30%, that is, the abnormal flow rate at the end directly affected by the increased drainage at the outlet is less likely to be caused by blockage.

[0044] When the electric valve is located at the water outlet of the integrated treatment equipment and the operation signal is to reduce the flow rate, the processing module judges that the blockage probability is 30% based on the detection position being close to the water inlet of the integrated treatment equipment, that is, when reducing drainage, it is less likely to be caused by blockage at the front end of the integrated treatment equipment. According to the detection position being located at the center of the integrated treatment equipment, the blockage probability is judged to be 45%, that is, when reducing drainage, there is a certain possibility that it is caused by the formation of solid matter by the internal reaction of the integrated treatment equipment. According to the detection position being far from the water inlet of the integrated treatment equipment, the blockage probability is judged to be 25%, that is, it is almost impossible to be caused by blockage at the water outlet when reducing drainage.

[0045] Since the electric valve at the water outlet end of the integrated treatment equipment is opened periodically, the situation where the electric valves at the water inlet and water outlet are opened at the same time is not considered.

[0046] When the correction of the abnormal operation of the electric valve is pending, the processing module obtains the dosing signal of the dosing device at the water inlet end of the integrated treatment equipment and determines whether the dosing signal is increasing. If the dosing signal is increasing, the processing module determines that there is no abnormality in the operation of the electric valve. If the dosing signal is decreasing, the processing module determines that the operation of the electric valve is abnormal.

[0047] When there is no abnormality in the operation of the electric valve, the processing module obtains the liquid level height from the liquid level sensor of the sludge tank and determines whether the liquid level height is greater than the warning value. When the liquid level height is greater than the warning value, the processing module records the abnormality and sends a highlighted display information to the early warning module.

[0048] When the electric valve is abnormal and is pending, the processing module sends a flashing display message to the early warning module. When the electric valve is currently abnormal, the processing module sends a sound abnormality message to the early warning module. When the electric valve is abnormal, the processing module sends a high-decibel sound abnormality message to the early warning module.

[0049] The specific implementation process is as follows:

[0050] By judging the type of the operation signal of each electric valve in the desulfurization wastewater recovery process, and then determining the delay time according to the electric valve type, the flow of each overflow channel at different time nodes is obtained according to the delay time, and the flow at each time node is compared to judge the current abnormality of the electric valve, and the increase or decrease in flow represented by the operation signal is judged. Based on the increase in flow and the decrease in flow, the abnormal operation of the electric valve is further judged; and when the electric valve operates abnormally, the blockage probability of the overflow channel is judged based on the detection position of the flow detection module, and the judgment threshold of the blockage probability is set according to the pollution degree of the desulfurization wastewater. Combined with the judgment threshold under different pollution degrees and the blockage probability under different circumstances, it is possible to accurately screen out whether the flow abnormality is caused by blockage rather than abnormal operation of the electric valve, under the premise that the internal situation of the integrated treatment equipment cannot be intuitively viewed, and the abnormality of the electric valve can be accurately distinguished before the electric valve automatically operates due to the abnormality, and the abnormality is discovered in advance.

[0051] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A monitoring system for boiler flue gas desulfurization wastewater recovery, including several flow detection modules located at each overflow channel within the integrated treatment equipment, a processing module capable of receiving operation signals from each electric valve, and an early warning module for fault warning prompts; Its characteristics are: After receiving the operation signal, the processing module first determines the type of the electric valve, and determines the operation delay time of the electric valve according to the type of the electric valve; The processing module obtains the real-time flow rate when receiving the operation signal, the intermediate flow rate after the operation delay time, and the subsequent flow rate after the delay time plus a preset time difference from each flow detection module. The processing module determines whether the real-time flow rate and the intermediate flow rate are equal for each flow detection module. If the real-time flow rate and the intermediate flow rate of all detection modules are equal, it is determined that there is no abnormality in the electric valve. When the real-time flow rate and the intermediate flow rate of any detection module are not equal, it is determined that the electric valve is currently abnormal. When the real-time flow rate is equal to the intermediate flow rate, the processing module determines the size of the intermediate flow rate and the subsequent flow rate according to the operation signal to increase or decrease the flow rate, so as to determine whether the reaction result after the electric valve adjustment is consistent with the operation result. When the reaction result after the electric valve adjustment is consistent with the operation result, the electric valve action is normal; when the reaction result after the electric valve adjustment is inconsistent with the operation result, the electric valve action is abnormal; When the electric valve operates abnormally, the processing module further determines the detection position of the flow detection module corresponding to the mark in the rear flow, and determines the blockage probability of the overflow channel according to the detection position. The processing module compares the blockage probability with a threshold value, and the threshold value is set according to the actual pollution level of the desulfurization wastewater. When the blockage probability is greater than the threshold value, the processing module corrects the abnormal operation of the electric valve to pending. When the blockage probability is less than the threshold value, the processing module determines that the electric valve operates abnormally. When determining the blockage probability of the overflow channel based on the detection position, the processing module determines the front and rear positions of the electric valve relative to the integrated treatment device. When the electric valve is located at the water inlet end of the integrated treatment device and the operation signal is to increase the flow rate, the processing module determines that the blockage probability is 70% based on the detection position being close to the water inlet end of the integrated treatment device, the blockage probability is 60% based on the detection position being located at the center of the integrated treatment device, and the blockage probability is 45% based on the detection position being away from the water inlet end of the integrated treatment device. When the electric valve is located at the water inlet end of the integrated treatment equipment and the operation signal is to reduce the flow rate, the processing module determines that the blockage probability is 40% based on the detection position being close to the water inlet end of the integrated treatment equipment, the blockage probability is 55% based on the detection position being located at the center of the integrated treatment equipment, and the blockage probability is 35% based on the detection position being far from the water inlet end of the integrated treatment equipment; When the electric valve is located at the water outlet of the integrated treatment equipment and the operation signal is to increase the flow rate, the processing module determines that the blockage probability is 55% based on the detection position being close to the water inlet of the integrated treatment equipment, 50% based on the detection position being located at the center of the integrated treatment equipment, and 30% based on the detection position being far from the water inlet of the integrated treatment equipment; When the electric valve is located at the water outlet of the integrated treatment equipment and the operation signal is to reduce the flow, the processing module judges that the blockage probability is 30% based on the detection position being close to the water inlet of the integrated treatment equipment, judges that the blockage probability is 45% based on the detection position being located at the center of the integrated treatment equipment, and judges that the blockage probability is 25% based on the detection position being far from the water inlet of the integrated treatment equipment.

2. The monitoring system for boiler flue gas desulfurization wastewater recovery according to claim 1 is characterized in that: When the operation signal is to increase the flow rate, the processing module determines whether the intermediate flow rate of any detection module is less than the subsequent flow rate. If the intermediate flow rate is less than the subsequent flow rate, the electric valve operates normally, and it is determined that the reaction result after the electric valve adjustment is consistent with the operation result. If the intermediate flow rate is greater than or equal to the subsequent flow rate, the electric valve operates abnormally, and it is determined that the reaction result after the electric valve adjustment is inconsistent with the operation result. When the operation signal is to reduce the flow, the processing module determines whether the intermediate flow of any detection module is greater than the subsequent flow. If the intermediate flow is greater than the subsequent flow, the electric valve operates normally, and it is determined that the reaction result after the electric valve is adjusted is consistent with the operation result. If the intermediate flow is less than or equal to the subsequent flow, the electric valve operates abnormally, and it is determined that the reaction result after the electric valve is adjusted is inconsistent with the operation result.

3. The monitoring system for boiler flue gas desulfurization wastewater recovery according to claim 1 is characterized in that: When the correction of the abnormal operation of the electric valve is pending, the processing module obtains the dosing signal of the dosing device at the water inlet end of the integrated treatment equipment, and determines whether the dosing signal is an increase. If the dosing signal is an increase, the processing module determines that there is no abnormality in the operation of the electric valve.

4. The monitoring system for boiler flue gas desulfurization wastewater recovery according to claim 3 is characterized in that: If the drug adding signal indicates a decrease in amount, the processing module determines that the electric valve is operating abnormally.

5. The monitoring system for boiler flue gas desulfurization wastewater recovery according to claim 4 is characterized in that: When the electric valve operates normally, the processing module obtains the liquid level height from the liquid level sensor of the sludge tank and determines whether the liquid level height is greater than the warning value. When the liquid level height is greater than the warning value, the processing module records the abnormality and sends a highlighted display information to the early warning module.

6. The monitoring system for boiler flue gas desulfurization wastewater recovery according to claim 5, characterized in that: When the electric valve is abnormal and is pending, the processing module sends a flashing display message to the early warning module. When the electric valve is currently abnormal, the processing module sends a sound abnormality message to the early warning module. When the electric valve is abnormal, the processing module sends a high-decibel sound abnormality message to the early warning module.

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