Portable on-line monitoring device for condensable particulate matters of stationary source

Abstract

The utility model belongs to the technical field of environment monitoring, and particularly relates to a portable on-line monitoring device for condensable particulate matters of a stationary source. The device comprises a semiconductor refrigeration module, seven peristaltic pumps, a liquid storage tank, a PLC (Programmable Logic Controller), three liquid level sensors, a conductivity sensor, a conductivity detection pool, a pH (Potential of Hydrogen) sensor, a pH detection pool, an ammonium ion sensor, an ammonium ion detection pool, a pH adjusting module, a reaction pool, an alkali liquor bottle, a stirring motor and the like. The device can be used for monitoring the concentration of condensable particulate matters in the flue gas on line, and the pipeline is simple and effective to clean. The device is low in investment cost, convenient to sample and carry, small in occupied area, light in weight and low in maintenance cost; the sampling process is highly automatic, and the equipment burden of environment monitoring personnel is reduced; the defects that in the prior art, the monitoring process is complex, online monitoring is not supported, and the size and weight are large are effectively overcome. The method can be widely applied to on-line monitoring of condensable particulate matters of stationary pollution sources.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the environmental monitoring technical field, concretely relates to a kind of waste gas condensable particulate matter online monitoring device. BACKGROUND

[0002] The condensable particulate matter (CPM) emissions of industrial source flue gas have exceeded filterable particulate matter. The implementation of ultra-low emission transformation puts forward higher requirements for the emissions and monitoring of unconventional pollutants such as CPM and NH3. CPM is a key indicator for the efficient and stable operation of ultra-low emission transformation technology, and its ultra-fine particle morphology and complex composition can cause biological toxicity and damage the atmospheric environment.

[0003] Currently, CPM monitoring mainly uses offline monitoring methods such as manual sampling and laboratory analysis, and there are fewer online methods that can achieve in-situ and real-time monitoring.

[0004] Offline methods include dry impingement condensation (EPA Method 202) and dilution condensation. In dry impingement condensation, CPM is condensed in a condensation tube and collected by an impingement bottle and a filter membrane. However, there is a positive bias caused by the absorption of components such as SO2. In dilution condensation, the rapid dilution and condensation process of flue gas emissions into the atmosphere is simulated. The required dilution chamber is large and heavy, has low condensation efficiency, and has a negative bias caused by wall condensation.

[0005] Online methods save manpower and resources, facilitate remote early warning and emission monitoring, and are a much-needed technical means for CPM monitoring and control. However, existing online CPM equipment is large and heavy, has high costs, and is not portable, which is not conducive to application in industrial sites. SUMMARY

[0006] In view of the shortcomings of the prior art, the utility model aims to provide a portable, online monitoring, and short-time fixed source condensable particulate matter monitoring device.

[0007] The portable fixed source condensable particulate matter online monitoring device provided by the utility model comprises a semiconductor refrigeration module 1, P1 peristaltic pumps 201, P2 peristaltic pumps 202, P3 peristaltic pumps 203, P4 peristaltic pumps 204, P5 peristaltic pumps 205, P6 peristaltic pumps 206, P7 peristaltic pumps 207, a liquid storage tank 3, a PLC controller 4, L1 high liquid level sensors 501, L2 low liquid level sensors 502, L3 liquid level sensors (03, conductivity sensors 6, conductivity detection pools 7, pH sensors 8, pH detection pools 9, ammonium ion sensors 10, ammonium ion detection pools 11, pH adjustment modules 12, reaction pools 13, lye bottles 14, stirring motors 15, transmission shafts 16, stirring paddles 17, cleaning liquid bottles 18, and data lines 401 connecting the PLC controller 4 and various sensors (such as 501, 503, 6, 8, 10, and 15).

[0008] wherein:

[0009] The semiconductor refrigeration module 1 is provided with a flue gas inlet, a cleaning liquid inlet at the front end, and a condensed flue gas outlet and a condensed liquid outlet at the rear end. The condensed liquid outlet is connected to the peristaltic pump P1, which functions to reduce the temperature of the flue gas delivered by the heating gun and condense the gaseous condensable particulate into liquid. Specifically, air-cooled or water-cooled semiconductor refrigeration can be used. Other refrigeration technologies, such as vapor compression refrigeration, absorption refrigeration, adsorption refrigeration, laser refrigeration, and magnetic refrigeration technology, can also be used.

[0010] The P1 peristaltic pump is connected to a hose at the rear end to deliver the condensed liquid to the top of the liquid storage tank. Its function is to deliver the condensed liquid from the refrigeration module outlet to the liquid storage tank.

[0011] The liquid storage tank is connected to the P2 peristaltic pump and the P3 peristaltic pump at the rear end using a three-way structure. Its function is to temporarily store the condensed liquid within a sampling period. The liquid storage tank is provided with an L2 low liquid level sensor and an L1 high liquid level sensor. The L2 low liquid level sensor corresponds to the minimum liquid level required to ensure that the sensor probe in each detection pool can normally contact the condensed liquid; the L1 high liquid level sensor corresponds to the maximum liquid level that ensures that the condensed liquid in each detection pool does not overflow. The top of the tank is provided with an inlet and an outlet to ensure smooth liquid flow. The tank body is provided with a transparent observation window or is made entirely of transparent material to facilitate observation of the condensed liquid.

[0012] The P2 peristaltic pump is connected to the conductivity detection pool and the pH detection pool at the rear end using a three-way structure. Its function is to deliver the condensed liquid in the liquid storage tank to the conductivity detection pool and the pH detection pool.

[0013] The P3 peristaltic pump is connected to a hose at the rear end to deliver the condensed liquid to the bottom of the reaction pool. Its function is to deliver the condensed liquid in the liquid storage tank to the reaction pool. When the condensed liquid in the reaction pool reaches the specified liquid level of the L3 liquid level sensor, the delivery of the condensed liquid to the reaction pool is stopped.

[0014] The conductivity detection pool is connected to the P6 peristaltic pump at the rear end, and a conductivity sensor is provided in the detection pool to detect the conductivity of the condensed liquid. Its function is to hold the container that contacts the conductivity sensor with the condensed liquid. The pool body is provided with a transparent observation window or is made entirely of transparent material to facilitate observation of the condensed liquid and its contact with the conductivity sensor. The conductivity sensor should be tightly sealed and fixed when connected to the detection pool to avoid random changes in the contact conditions between the sensor and the condensed liquid. An outlet should be provided at the top of the detection pool to ensure smooth liquid flow.

[0015] The conductivity sensor functions to detect the conductivity of the condensed liquid.

[0016] The pH detection tank is connected to the rear end of the P6 peristaltic pump, and a pH sensor is arranged in the detection tank to detect the pH of the condensed liquid. Its function is to obtain the pH value of the condensed liquid, and to calculate the amount of alkali solution needed to be added to the reaction tank according to the pH value. The tank body is provided with a transparent observation window or is completely made of transparent material, so as to facilitate observation of the situation of the condensed liquid and its contact with the pH sensor. The pH sensor connected with the detection tank should be sealed and fixed to avoid random changes in the contact conditions of the sensor and the condensed liquid. An air outlet should be left at the top of the detection tank to ensure smooth flow of the liquid.

[0017] The pH sensor detects the pH data of the condensed liquid.

[0018] The pH adjusting module includes an alkali bottle, a P4 peristaltic pump, a P5 peristaltic pump, a reaction tank, a stirring motor, and an L3 liquid level sensor. The components that come into contact with the alkali solution should be made of acid and alkali resistant materials, including the alkali bottle, the peristaltic pump, the motor driven shaft, the stirring paddle, the reaction tank, and the hose. Its function is to adjust the pH of the condensed liquid to a range suitable for the detection of ammonium ion sensors, to avoid damaging the ammonium ion sensors, to improve the detection accuracy, and to prolong the service life.

[0019] The alkali bottle is connected to the rear end of the P4 peristaltic pump through a hose. Its function is to store the alkali solution used to adjust the pH of the condensed liquid. The alkali solution can be sodium hydroxide solution or potassium hydroxide solution.

[0020] The P4 peristaltic pump is a high-precision peristaltic pump connected to the rear end of the hose to supply liquid to the top of the reaction tank. Its function is to pump the alkali solution into the reaction tank according to the calculated amount of alkali solution.

[0021] The reaction tank is connected to the rear end of the P5 peristaltic pump. The reaction tank has a drive shaft of a stirring motor and a stirring paddle inside, and an L3 liquid level sensor outside. Its function is to make the quantitative condensed liquid react with the quantitative and known pH alkali solution. The total volume of the two liquids injected into the reaction tank should be less than the total volume that the ammonium ion detection tank can accommodate. The tank body is provided with a transparent observation window or is completely made of transparent material, so as to facilitate observation of the reaction of the condensed liquid with the alkali solution, as well as the working condition of the stirring paddle.

[0022] The stirring motor is connected to the stirring paddle in the reaction tank through a drive shaft. Its function is to slowly start stirring after the condensed liquid and the alkali solution are finished flowing into the reaction tank, so that the mixed liquid can react uniformly.

[0023] The L3 liquid level sensor corresponds to the volume of the condensed liquid in the reaction tank before the alkali solution is added. Its function is to control the volume of the condensed liquid participating in the reaction in the reaction tank.

[0024] The P5 peristaltic pump is connected to the rear end of the ammonium ion detection tank. Its function is to send the condensed liquid in the reaction tank to the ammonium ion detection tank.

[0025] The ammonium ion detection cell is connected to a P6 peristaltic pump at its rear end. Its function is to hold the condensate that comes into contact with the ammonium ion sensor. The cell body is equipped with a transparent observation window or is made entirely of transparent material to facilitate observation of the condensate and its contact with the ammonium ion sensor. The connection between the ammonium ion sensor and the detection cell should be tightly sealed and fixed to prevent random changes in the contact conditions between the sensor and the reaction liquid. An vent should be provided at the top of the detection cell to ensure smooth liquid inflow.

[0026] The ammonium ion sensor is used to detect the concentration of ammonium ions in the reaction solution.

[0027] The P6 peristaltic pump has its inlet connected to the outlet of the conductivity detection cell, pH detection cell, and ammonium ion detection cell. Its function is to discharge the liquid from each detection cell.

[0028] The P7 peristaltic pump has its inlet connected to a cleaning fluid bottle. Its function is to deliver the cleaning fluid to the cleaning fluid inlet of the refrigeration module.

[0029] The cleaning solution bottle is used to store cleaning solution for cleaning residues in the storage tank, various testing cells, reactor, and pipelines. The cleaning solution can specifically be ultrapure water.

[0030] The PLC controller controls the operation of each part of the detection system through a program. The functions of the PLC controller can be implemented using a commonly used PLC controller, such as the Siemens S7-1200 series.

[0031] The portable fixed-source online monitoring device for condensable particulate matter provided by this utility model has the following specific working process:

[0032] (I) Online Measurement

[0033] (1) The flue gas enters through the smoke gun and is transported to the semiconductor refrigeration module 1 for cooling, forming condensate.

[0034] (2) Start peristaltic pump P1 201. The condensate is transported to storage tank 3 by peristaltic pump P1 201. The liquid level that meets the detection requirements should exceed the low liquid level sensor L2 502 but not exceed the high liquid level sensor L1 501. When the liquid level reaches the high liquid level sensor L1 501, stop the flue gas intake and condensation. The liquid in storage tank 3 will be sent to the detection pool and reaction pool. Turn off peristaltic pump P1 201.

[0035] (3) Start P2 peristaltic pump 202. Part of the liquid in the storage tank 3 is sent to the conductivity detection cell 7 and the pH detection cell 9 by the P2 peristaltic pump 202 to detect the conductivity and pH of the liquid respectively. Calculate the required alkali liquid volume according to the pH value. The working time of the P2 peristaltic pump 202 is calculated according to the flow rate of the P2 peristaltic pump 202 and the required condensate volume in the conductivity detection cell 7 and the pH detection cell 9. When the working time is reached, turn off the P2 peristaltic pump 202.

[0036] (4) Start P3 peristaltic pump 203. The remaining liquid in the storage tank 3 is sent to the reaction cell 13 by the P3 peristaltic pump 203. When the liquid level of the L3 liquid level sensor 503 is reached, stop the liquid input and turn off the P3 peristaltic pump 203.

[0037] (5) Start P4 peristaltic pump 204. According to the calculated volume, the P4 peristaltic pump 204 inputs the alkali liquid from the top of the reaction cell 13. Turn off the P4 peristaltic pump 204. Start the motor stirring 15 to make the two reaction liquids fully react. The total amount of the two liquids input into the reaction cell 13 should be less than the volume that can be accommodated by the ammonium ion detection cell 11.

[0038] (6) Start P5 peristaltic pump 205 to send the reaction liquid to the ammonium ion detection cell 11 to detect the ammonium ion concentration of the reaction liquid. Turn off the P5 peristaltic pump 205.

[0039] (7) After all the conductivity, pH, and ammonium ion sensors have been detected, start the P6 peristaltic pump 206 to drain the remaining liquid in each detection cell.

[0040] (8) Calculate the concentration of the condensable particulate matter of the fixed source. The calculation formula is:

[0041] C WSI = k1 x EC m + b, (1)

[0042]

[0043] where C WSI is the ion mass concentration in the CPM condensate; EC m is the calculated conductivity after processing the conductivity, pH, and ammonium ion data; k1 and b are empirical formula constants obtained by linear fitting; k2 is an empirical constant; V g is the volume of the condensate; V L is the volume of the flue gas; C CPM is the mass concentration of CPM in the flue gas;

[0044] (II) Pipeline cleaning

[0045] (1) Turn off the semiconductor refrigeration module 1.

[0046] (2) Start P7 peristaltic pump 207, the cleaning solution is transported by P1 peristaltic pump 201 to the cleaning solution inlet of refrigeration module 1. The cleaning solution flows through the refrigeration module 1 and flows out from the outlet. Turn off P7 peristaltic pump 207.

[0047] (3) Start P1 peristaltic pump 201, the cleaning solution is transported by P1 peristaltic pump 201 to the liquid storage tank 3. When the liquid level sensor 501 reaches the corresponding liquid level, turn off P1 peristaltic pump 201.

[0048] (4) Start P2 peristatic pump 202, the cleaning solution is transported by P2 peristatic pump 202 to conductivity detection cell 7 and pH detection cell 9. The working time of P2 peristatic pump 202 is calculated according to the flow of P2 peristatic pump 202 and the volume of cleaning solution required by conductivity detection cell 7 and pH detection cell 9. The working time should be consistent with the online measurement. When the working time is reached, turn off P2 peristatic pump 202.

[0049] (5) Start P3 peristaltic pump 203, the cleaning solution is transported by P3 peristaltic pump 203 to the reaction cell 13. When the liquid level sensor 503 reaches the corresponding liquid level, turn off P3 peristaltic pump 203. Start the stirring motor 15 to realize the cleaning of the stirring paddle 17. Turn off the stirring motor 15.

[0050] (6) Start P5 peristaltic pump 205, the cleaning solution is transported by P5 peristaltic pump 205 to the ammonium ion detection cell 11. When the transportation is completed, turn off P5 peristaltic pump 205.

[0051] (7) Start P6 peristaltic pump 206 to discharge the cleaning solution in each detection cell. Complete the cleaning.

[0052] The start and stop of the above components, parameter calculation are all automatically completed, which are realized by the control of PLC controller 4. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 It is a structure schematic view of the portable fixed source condensable particulate matter online monitoring device of the utility model.

[0054] Figure 2 It is a pH adjusting module schematic view in the device of the utility model.

[0055] Figure 3 It is the measurement value of the device and the standard method.

[0056] The figure mark: 1 is semiconductor refrigeration module, 201 is peristaltic pump P1, 202 is peristaltic pump P2, 203 is peristaltic pump P3, 204 is peristaltic pump P4, 205 is peristaltic pump P5, 206 is peristaltic pump P6, 207 is peristaltic pump P7, 3 is liquid storage tank, 4 is PLC controller, 501 is high liquid level sensor L1, 502 is low liquid level sensor L2, 503 is liquid level sensor L3, 6 is conductivity sensor, 7 is conductivity detection pool, 8 is pH sensor, 9 is pH detection pool, 10 is ammonium ion sensor, 11 is ammonium ion detection pool, 12 is pH adjustment module, 13 is reaction pool, 14 is lye bottle, 15 is stirring motor, 16 is transmission shaft, 17 is stirring paddle, 18 is cleaning liquid bottle.401 is the data line connecting PLC controller and sensor (501, 503, 6, 8, 10, 15). DETAILED DESCRIPTION

[0057] The utility model is further explained below in combination with the drawings and examples, but the protection scope of the patent is not limited to this.

[0058] Example: as Figure 1 The figure mark: 1 is semiconductor refrigeration module, 201 is peristaltic pump P1, 202 is peristaltic pump P2, 203 is peristaltic pump P3, 204 is peristaltic pump P4, 205 is peristaltic pump P5, 206 is peristaltic pump P6, 207 is peristaltic pump P7, 3 is liquid storage tank, 4 is PLC controller, 501 is high liquid level sensor L1, 502 is low liquid level sensor L2, 503 is liquid level sensor L3, 6 is conductivity sensor, 7 is conductivity detection pool, 8 is pH sensor, 9 is pH detection pool, 10 is ammonium ion sensor, 11 is ammonium ion detection pool, 12 is pH adjustment module, 13 is reaction pool, 14 is lye bottle, 15 is stirring motor, 16 is transmission shaft, 17 is stirring paddle, 18 is cleaning liquid bottle.401 is the data line connecting PLC controller and sensor (501, 503, 6, 8, 10, 15).

[0059] In the embodiment, semiconductor refrigeration module 1 is water-cooled semiconductor refrigeration technology or air-cooled semiconductor refrigeration technology, specifically like semiconductor liquid circulation heat exchange mode, semiconductor air-cooled forced convection heat exchange mode.In addition to semiconductor refrigeration, other refrigeration technologies can also be used, such as vapor compression refrigeration, absorption refrigeration, adsorption refrigeration, laser refrigeration technology, magnetic refrigeration technology.

[0060] In the embodiment, peristaltic pump P1, the rear end connects the hose to the top of the liquid storage tank.Cooling liquid is sent from the refrigeration module outlet to the liquid storage tank.It can be a linear peristaltic pump or a rotary peristaltic pump.

[0061] In this embodiment, the liquid storage tank, the rear end of the three-way structure connected to peristaltic pump P2 and peristaltic pump P3. Temporary storage of a sample period of condensate. The liquid storage tank is set low level sensor L2 and high level sensor L1. A sampling period of condensate maximum liquid level, set corresponding to the high level sensor level. The top of the liquid storage tank is left into the liquid inlet and outlet, the tank is provided with a transparent observation window or completely using transparent material. Specifically can be glass or polytetrafluoroethylene plastic. The bottom is funnel-shaped, facilitating the discharge of condensate.

[0062] In this embodiment, peristaltic pump P2, the rear end of the three-way structure connected to conductivity detection pool and pH detection pool. The role is to send the condensate in the liquid storage tank to the conductivity detection pool and pH detection pool.

[0063] In this embodiment, peristaltic pump P3, the rear end of the hose to the bottom of the reaction pool into the liquid. The role is to send the condensate in the liquid storage tank to the reaction pool. When the reaction pool condensate reaches the level sensor L3 specified level, stop sending condensate into the reaction pool.

[0064] In this embodiment, the conductivity detection pool, the rear end of the peristaltic pump P6, the detection pool is provided with a conductivity sensor to detect the conductivity of the condensate. The role is to hold the condensate in contact with the conductivity sensor container. The pool is provided with a transparent observation window or completely using transparent material, to facilitate the observation of the condensate and its contact with the conductivity sensor. The conductivity sensor and the detection pool should be sealed and fixed, to avoid the random changes in the sensor and the condensate contact conditions. The top of the detection pool should be left with the outlet, to ensure the smooth flow of liquid. The main material can be glass or polytetrafluoroethylene plastic. The bottom is funnel-shaped, facilitating the discharge of condensate.

[0065] In this embodiment, the conductivity sensor, the role is to detect the conductivity of the condensate. Specifically can be platinum black electrode or titanium alloy electrode, the shell should be glass or plastic material. Preferably, it should have temperature compensation correction function.

[0066] In this embodiment, the pH detection pool, the rear end of the peristaltic pump P6, the detection pool is provided with a pH sensor to detect the pH of the condensate. The role is to obtain the pH value of the condensate, and calculate the amount of alkali required to be added to the reaction pool according to the pH value. The pool is provided with a transparent observation window or completely using transparent material. The pH sensor and the detection pool should be sealed and fixed. The top of the detection pool should be left with the outlet, to ensure the smooth flow of liquid. The main material can be glass or polytetrafluoroethylene plastic. The bottom is funnel-shaped, facilitating the discharge of condensate.

[0067] In this embodiment, the pH sensor, the role is to detect the pH data of the condensate. Specifically can be platinum electrode or glass electrode, the shell should be glass or plastic material, such as PEEK, Ryton material. Preferably, it should have temperature compensation correction function.

[0068] In the present embodiment, the pH adjustment module includes a lye bottle, a peristaltic pump P4, a peristaltic pump P5, a reaction tank, a stirring motor, and a liquid level sensor L3. Among them, the components in contact with the lye should be acid and alkali resistant materials, including the lye bottle, the peristaltic pump, the motor-driven rotating shaft, the stirring paddle, the reaction tank, and the hose.

[0069] In the present embodiment, the lye bottle is connected to the peristaltic pump P4 at the rear end through a hose. Its function is to store lye for adjusting the pH of the condensate. The lye can be specifically sodium hydroxide solution or potassium hydroxide solution.

[0070] In the present embodiment, the peristaltic pump P4 is a high-precision peristaltic pump connected to the hose at the rear end to feed liquid to the top of the reaction tank. Its function is to pump lye into the reaction tank according to the calculated amount of lye. It can be specifically a linear peristaltic pump or a rotary peristaltic pump. Preferably, it is a flow-type high-precision peristaltic pump with flow display and correction functions.

[0071] In the present embodiment, the reaction tank is connected to the peristaltic pump P5 at the rear end. The reaction tank has a drive shaft of a stirring motor and a stirring paddle inside, and a liquid level sensor L3 outside. Its function is to make the quantitative condensate react with the quantitative and known-pH lye. The total volume of the two liquids injected into the reaction tank should be less than the total volume that the ammonium ion detection tank can accommodate. The tank body is provided with a transparent observation window or is made entirely of transparent material to facilitate observation of the reaction of the condensate with the lye and the working condition of the stirring paddle. An air outlet should be left at the top of the reaction tank to ensure smooth flow of the liquid. The main material can be specifically glass or polytetrafluoroethylene plastic. The bottom is funnel-shaped to facilitate the discharge of the condensate.

[0072] In the present embodiment, the stirring motor is connected to the stirring paddle inside the reaction tank through a drive shaft. Its function is to start stirring slowly after the condensate and lye are fed into the reaction tank to make the mixed liquid react uniformly. It can be specifically a stepper motor, a DC motor, an AC motor, or a brushless motor.

[0073] In the present embodiment, the stirring paddle is specifically four-leaf, one-letter, centrifugal, or fan-leaf type. The material is corrosion-resistant, such as plastic or glass.

[0074] In the present embodiment, the liquid level sensor L3 corresponds to the volume of the condensate in the reaction tank before the lye is added. Its function is to control the volume of the condensate participating in the reaction in the reaction tank. It can be specifically a contact liquid level sensor, such as a drop-in liquid level sensor or a photoelectric liquid level sensor; or a non-contact liquid level sensor, such as a capacitive liquid level sensor or an ultrasonic liquid level sensor.

[0075] In the present embodiment, the peristaltic pump P5 is connected to the ammonium ion detection tank at the rear end. Its function is to send the condensate in the reaction tank to the ammonium ion detection tank.

[0076] In this embodiment, the ammonium ion detection pool, the back end is connected with the peristaltic pump P6. The function is to hold the condensate which contacts with the ammonium ion sensor. The pool body is provided with a transparent observation window or is made of transparent material completely, which is convenient for observing the situation of the condensate and the contact situation with the ammonium ion sensor. The connection between the ammonium ion sensor and the detection pool should be sealed and fixed, so as to avoid the random change of the contact condition between the sensor and the reaction liquid. There should be an air outlet at the top of the detection pool, so as to ensure the smooth flow of the liquid. The main body material can be glass or polytetrafluoroethylene plastic. The bottom is funnel-shaped, which is convenient for the discharge of the condensate.

[0077] In this embodiment, the ammonium ion sensor, the function is to detect the ammonium ion concentration of the reaction liquid. The shell should be made of glass or plastic material, such as PPS material. Preferably, it should have the compensation correction function of potassium ion, pH and temperature parameters.

[0078] In this embodiment, the peristaltic pump P6, the liquid inlet is connected with the liquid outlet of the conductivity detection pool, the pH detection pool and the ammonium ion detection pool. The function is to discharge the liquid in each detection pool.

[0079] In this embodiment, the peristaltic pump P7, the liquid inlet is connected with the cleaning liquid bottle (18). The function is to send the cleaning liquid to the cleaning liquid inlet of the refrigeration module (1).

[0080] In this embodiment, the cleaning liquid bottle, the function is to store the cleaning liquid for cleaning the residual substances of the liquid storage tank, each detection pool, the reactor and the pipeline. The cleaning liquid can be ultrapure water.

[0081] The use method of this embodiment, the specific process includes:

[0082] (I) On-line measurement

[0083] 1. The flue gas enters the smoke gun and is transported to the semiconductor refrigeration module 1 for cooling to form condensate.

[0084] 2. Start P1 peristaltic pump 201, and the condensate is transported to the liquid storage tank 3 by P1 peristaltic pump 201. The liquid level meeting the detection requirements should exceed L2 low liquid level sensor 502 and should not exceed L1 high liquid level sensor 501. When the liquid level reaches L1 high liquid level sensor 501, stop the flue gas and condensation. The liquid in the liquid storage tank 3 will be sent to the detection pool and the reaction pool. Close P1 peristaltic pump 201.

[0085] 3. Start P2 peristaltic pump 202. Part of the liquid in the liquid storage tank 3 is sent to the conductivity detection pool 7 and the pH detection pool 9 by P2 peristaltic pump 202, respectively, to detect the conductivity and pH of the liquid. According to the pH value, the required alkali volume is calculated. The working time of P2 peristaltic pump 202 is calculated according to the flow of P2 peristaltic pump 202, the required condensate volume in the conductivity detection pool 7 and the pH detection pool 9. When the working time is reached, close P2 peristaltic pump 202.

[0086] 4、Start P3 peristaltic pump 203. The remaining liquid in the liquid storage tank 3 is sent to the reaction tank 13 by the P3 peristaltic pump 203. When the liquid level reaches the L3 liquid level sensor 503, stop the liquid input and turn off the P3 peristaltic pump 203.

[0087] 5、Start P4 peristaltic pump 204. According to the calculated volume, P4 peristaltic pump 204 will input lye from the top of the reaction tank 13. Turn off P4 peristaltic pump 204. Start the motor to stir 15, so that the two reaction liquids can fully react. The total amount of liquid input into the reaction tank 13 should be less than the volume that can be accommodated by the ammonium ion detection tank 11.

[0088] 6、Start P5 peristaltic pump 205 to send the reaction liquid to the ammonium ion detection tank 11 to detect the ammonium ion concentration of the reaction liquid. Turn off P5 peristaltic pump 205.

[0089] 7、After the conductivity, pH, and ammonium ion sensors have all been detected, start P6 peristaltic pump 206 to drain the remaining liquid in each detection tank.

[0090] 8、Calculate the concentration of condensable particulate matter from fixed sources:

[0091] Through the calculation of conductivity EC processed from conductivity, pH, and ammonium ion data m , combined with the condensate volume V g and the flue gas volume V L parameters, the concentration of condensable particulate matter is obtained according to the built-in different emission source CPM empirical formula.

[0092] For different types of emission sources, the PLC controller will automatically select the corresponding empirical formula type through the program.

[0093] (II) Pipeline cleaning

[0094] 1、Turn off the semiconductor refrigeration module 1.

[0095] 2、Start P7 peristaltic pump 207, the cleaning liquid is transported by P1 peristaltic pump 201 to the cleaning liquid inlet of the refrigeration module 1. The cleaning liquid flows through the refrigeration module 1 and flows out from the outlet. Turn off P7 peristaltic pump 207.

[0096] 3、Start P1 peristaltic pump 201, the cleaning liquid is transported by P1 peristaltic pump 201 to the liquid storage tank 3. When the liquid level reaches the corresponding liquid level of the liquid level sensor 501, turn off P1 peristaltic pump 201.

[0097] 4. Start peristaltic pump P2 202. The cleaning solution is delivered by peristaltic pump P2 202 to conductivity detection cell 7 and pH detection cell 9. The operating time of peristaltic pump P2 202 is calculated based on the flow rate of peristaltic pump P2 202 and the required volume of cleaning solution in conductivity detection cell 7 and pH detection cell 9. The operating time should be consistent with that during online measurement. Once the operating time is reached, turn off peristaltic pump P2 202.

[0098] 5. Start peristaltic pump P3 203. The cleaning solution is delivered to reaction tank 13 by peristaltic pump P3 203. When the liquid level reaches the level corresponding to level sensor 503, turn off peristaltic pump P3 203. Start stirring motor 15 to clean the stirring paddle 17. Turn off stirring motor 15.

[0099] 6. Start the P5 peristaltic pump 205. The cleaning solution is delivered to the ammonium ion detection cell 11 by the P5 peristaltic pump 205. After delivery is complete, turn off the P5 peristaltic pump 205.

[0100] 7. Start the P6 peristaltic pump 206 to drain the cleaning solution from each test tank. Cleaning complete.

[0101] (III) Instance Detection Results

[0102] To verify the actual monitoring performance of this device, simultaneous field tests were conducted at fixed pollution sources to compare its performance with that of standard methods. The tests covered flue gas sampling points from typical emission sources such as coal-fired power plants, steel smelters, and industrial boilers, systematically examining the operational stability of this portable device under heterogeneous emission environments.

[0103] Test data such as Figure 3 As shown, the measurements obtained by this device and the standard method exhibit a significant linear correlation (correlation coefficient r = 0.983), demonstrating synchronous response characteristics during dynamic changes in CPM emission concentration. Further analysis reveals that the device's built-in multi-source adaptation algorithm effectively eliminates the interference of CPM composition differences from different emission sources by dynamically matching the characteristic parameters of coal-fired flue gas, metallurgical waste gas, and boiler exhaust gas. In typical test points such as the sintering machine head of a steel plant and the flue gas duct after dust removal in a power plant, the absolute deviation between the device and the standard method is less than 15%, verifying its measurement consistency under multiple operating conditions.

Claims

1. A portable fixed source condensable particulate matter on-line monitoring device, characterized in that, It includes: Semiconductor refrigeration module (1), P1 peristaltic pump (201), P2 peristaltic pump (202), P3 peristaltic pump (203), P4 peristaltic pump (204), P5 peristaltic pump (205), P6 peristaltic pump (206), P7 peristaltic pump (207), liquid storage tank (3), PLC controller (4), L1 high liquid level sensor (501), L2 low liquid level sensor (502), L3 liquid level sensor (503), conductivity sensor (6), conductivity detection cell (7), pH sensor (8), pH detection cell (9), ammonium ion sensor (10), ammonium ion detection cell (11), pH adjustment module (12), reaction cell (13), lye bottle (14), stirring motor (15), transmission shaft (16), stirring paddle (17), cleaning fluid bottle (18), data line (401) connecting PLC controller and each sensor; wherein: The front end of the semiconductor refrigeration module (1) is provided with a flue gas inlet and a cleaning liquid inlet, and the rear end is provided with a condensed flue gas outlet and a condensed liquid outlet; the condensed liquid outlet is connected with the P1 peristaltic pump (201); its function is to reduce the temperature of the flue gas conveyed by the heating gun, so that the condensable particulate matter is condensed from gas to liquid; The P1 peristaltic pump (201) is connected with a hose at the rear end to feed the condensed liquid from the refrigeration module (1) outlet into the liquid storage tank (3); The liquid storage tank (3) is connected with the P2 peristaltic pump (202) and the P3 peristaltic pump (203) at the rear end by a tee structure; its function is to temporarily store the condensed liquid in a sampling period; the liquid storage tank (3) is provided with L2 low liquid level sensor (502) and L1 high liquid level sensor (501); L2 low liquid level sensor (502) corresponds to the low liquid level of the liquid storage tank (3), which ensures that the sensor probe in each detection cell can normally contact the minimum liquid level required by the condensed liquid; L1 high liquid level sensor (501) corresponds to the high liquid level of the liquid storage tank (3), which ensures that the maximum liquid level of the condensed liquid in each detection cell does not overflow; the top of the liquid storage tank (3) is provided with a liquid inlet and an air outlet; The P2 peristaltic pump (202) is connected with the conductivity detection cell (7) and the pH detection cell (9) at the rear end by a tee structure, which functions to send the condensed liquid in the liquid storage tank (3) into the conductivity detection cell (7) and the pH detection cell (9); The P3 peristaltic pump (203) is connected with a hose at the rear end to feed the condensed liquid in the liquid storage tank (3) into the reaction cell (13); when the condensed liquid in the reaction cell (13) reaches the specified liquid level of the L3 liquid level sensor (503), the feeding of the condensed liquid into the reaction cell (13) is stopped; The conductivity detection cell (7) is connected with the P6 peristaltic pump (206) at the rear end, and the conductivity sensor (6) is arranged in the detection cell to detect the conductivity of the condensed liquid; its function is to contain the condensed liquid in contact with the conductivity sensor (6); the conductivity sensor (6) and the conductivity detection cell (7) should be sealed and fixed; an air outlet should be left at the top of the detection cell; The pH detection tank (9) is connected with a P6 peristaltic pump (206) at the rear end, and a pH sensor (8) is arranged in the pH detection tank (9) to detect the pH value of the condensed liquid; the function is to obtain the pH value of the condensed liquid, and the amount of alkali liquid required to be added into the reaction tank (13) is calculated according to the pH value; the pH sensor (8) is connected with the pH detection tank (9) and is sealed and fixed; an air outlet is reserved at the top of the detection tank; The pH adjusting module (12) comprises an alkali liquid bottle (14), a P4 peristaltic pump (204), a P5 peristaltic pump (205), a reaction tank (13), a stirring motor (15) and an L3 liquid level sensor (503); wherein the components in contact with the alkali liquid should be made of acid and alkali resistant materials, including the alkali liquid bottle (14), the P4 peristaltic pump (204), a transmission shaft (16), a stirring paddle (17), the reaction tank (13) and a connecting hose; the function is to adjust the pH value of the condensed liquid to a range suitable for the detection of the ammonium ion sensor; wherein: The alkali liquid bottle (14) is connected with the P4 peristaltic pump (204) through a hose at the rear end, and the function is to store the alkali liquid used for adjusting the pH value of the condensed liquid; The P4 peristaltic pump (204) is a high-precision peristaltic pump, and a hose is connected to the top of the reaction tank (13) at the rear end, and the function is to pump the alkali liquid into the reaction tank (13) according to the calculated amount of alkali liquid; The reaction tank (13) is connected with the P5 peristaltic pump (205) at the rear end; the reaction tank (13) has a transmission shaft (16) and a stirring paddle of the stirring motor (15) inside, and an L3 liquid level sensor (503) outside; the function is to make the quantitative condensed liquid react with the quantitative and known pH alkali liquid; the total amount of the two liquids injected into the reaction tank (13) should be less than the total volume that can be accommodated by the ammonium ion detection tank (11); The stirring motor (15) is connected to the stirring paddle (17) in the reaction tank (13) through the transmission shaft (16), and the function is to slowly start stirring after the condensed liquid and the alkali liquid are finished entering the reaction tank (13), so that the mixed liquid is uniformly reacted; The L3 liquid level sensor (503) corresponds to the liquid level of the reaction tank (13), which is the volume of the condensed liquid in the reaction tank (13) before adding the alkali liquid; the function is to control the volume of the condensed liquid participating in the reaction in the reaction tank (13); The P5 peristaltic pump (205) is connected with the ammonium ion detection tank (11) at the rear end; the function is to send the condensed liquid in the reaction tank (13) into the ammonium ion detection tank (11); The ammonium ion detection tank (11) is connected with the P6 peristaltic pump (206) at the rear end, and the function is to accommodate the condensed liquid in contact with the ammonium ion sensor (10); the ammonium ion sensor (10) should be sealed and fixed when connected with the detection tank; an air outlet should be reserved at the top of the detection tank; The ammonium ion sensor (10) is used to detect the ammonium ion concentration of the reaction liquid; The P6 peristaltic pump (206) is connected with the liquid outlet ends of the conductivity detection tank (7), the pH detection tank (9) and the ammonium ion detection tank (11) at the liquid inlet; the function is to discharge the liquid in each detection tank; The P7 peristaltic pump (207) is connected with the cleaning liquid bottle (18) at the liquid inlet; it is used to send the cleaning liquid to the cleaning liquid inlet of the refrigeration module (1); The cleaning liquid bottle (18) is used for storing cleaning liquid for cleaning the residual liquid in the liquid storage tank, the detection cell, the reactor and the pipeline, and the cleaning liquid can be ultrapure water. The PLC controller (4) controls the working process of each part of the detection system through a program.

2. The portable fixed source condensable particulate matter on-line monitoring device according to claim 1, characterized in that, The semiconductor refrigeration module (1) is specifically a wind-cooled or water-cooled semiconductor refrigeration module, or a vapor compression refrigeration module, an absorption refrigeration module, an adsorption refrigeration module, a laser refrigeration module or a magnetic refrigeration module.

3. The portable fixed source condensable particulate matter on-line monitoring device according to claim 1, characterized in that, The alkali solution is a sodium hydroxide solution or a potassium hydroxide solution.

4. The portable fixed source condensable particulate matter online monitoring device according to claim 1, characterized in that: The liquid storage tank (3) is provided with a transparent observation window or is completely made of transparent material, so that the condition of the condensed liquid can be observed; The conductivity detection cell (7) is provided with a transparent observation window or is completely made of transparent material, so that the condition of the condensed liquid and the contact between the condensed liquid and the conductivity sensor (6) can be observed; The pH detection cell (9) is provided with a transparent observation window or is completely made of transparent material, so that the condition of the condensed liquid and the contact between the condensed liquid and the pH sensor (8) can be observed; The reaction cell (13) is provided with a transparent observation window or is completely made of transparent material, so that the reaction between the condensed liquid and the alkali solution and the working condition of the stirring paddle (17) can be observed; The ammonium ion detection cell (11) is provided with a transparent observation window or is completely made of transparent material, so that the condition of the condensed liquid and the contact between the condensed liquid and the ammonium ion sensor (10) can be observed.

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