| Monitoring System |
Fig below illustrates a schematic diagram of the monitoring system, which is composed of three analysis chambers with multiple probes, which have the functions of parameter monitoring, sample titration for treatment prediction, probe calibration, chamber washing and analyzed sample discharge. In the monitoring system, the multiple probes, mini-stirrer and level sensors are installed in the analysis chambers.
Schematic diagram of the monitoring system
MF Chamber
Fig below illustrates a schematic diagram of the MF chamber. pH, ORP, TDS, DO, SS and T are six basic and important parameters in the quality control of waste chemical and wastewater treatment so that these parameter monitoring sensor have been selected to install in the MF chamber. Eight chemical containers are coupled to the MF chamber, and four of them (item TC1, TC2, TC3 and TC4) hold standard chemical solutions for pH and ORP calibration, and other four of them (item TC5, TC6, TC7 and TC8) hold standard chemical solutions for pH and ORP titration. All the containers are located about 40 cm higher than the MF chamber, and each container has a solenoid valve in the bottom. When the solenoid valve open, the chemical can flow into the MF chamber from the container under the gravity. In Fig below six sensors (item SC1, SC2, SC3, SC4, SC5 and SC6) are installed near the bottom of the MF chamber as much as possible, and this design is for minimizing of the chemical consumption in the calibration and titration. A motor (item MC) with a small stirrer is installed in the center of the cover of the MF chamber, and is used to mix the solution in the MF chamber. A conductivity level switch (item LSC) with four electrodes (item LC1, LC2, LC3 and LC4) is also installed in the cover of the MF chamber, and is used to control the sample level of the MF chamber to stay in three setting points. All the inlets coupled to the MF chamber are connected to a manifold first, and then only one pipe is coupled to the cover of the MF chamber directly. The MF chamber has an overflow pipe to prevent any cases of level sensor from the abnormal condition. The MF chamber has a drain in the bottom to empty the chamber completely according to the requirement of the operation. The MF chamber system has several different operation modes, including sample measurement, titration and calibration as well as chamber wash and discharge.
Schematic diagram of the MF chamber
ISE Chamber
Fig below illustrates a schematic diagram of the ISE chamber. ISE technology is one of the most useful methods to monitor the anions in the chemical analysis. As the measure principles and procedures for the ISE are very similar, all the ISE are installed in a chamber, named ISE chamber. In this present invention, chloride (Cl-), fluoride (F-), cyanide (CN-) and sulfide (S-2) ISE are selected to be installed in the ISE chamber. Furthermore, more ISE can be installed in the chamber with minor modification and these four electrodes are also easily to be replaced by other commercial ISE according to the specific requirement of the application without modification.
Schematic diagram of the ISE chamber
Six chemical containers are coupled to the ISE chamber, and two of them (item TS1 and TS2) hold chemical buffer to adjust the ion strength and measuring condition of the sample solution, and other four of them (item TS3, TS4, TS5 and TS6) holds standard chemical solution for calibrating the ISE. All the containers are located about 40 cm higher than the ISE chamber, and each container has a solenoid valve in the bottom. When the solenoid valve open, the chemical can flow into the ISE chamber from the container under the gravity. In Fig. 6, four sensors (item SS1, SS2, SS3 and SC4) are installed near the bottom of the ISE chamber as much as possible, and this design can save the standard chemical for the calibration. A motor (item MS) with a small stirrer is installed in the center of the cover of the ISE chamber, and is used to mix the solution in the ISE chamber. A conductivity level switch (item LSS) with four electrodes (item LS1, LS2, LS3 and LS4) is also installed in the cover of the ISE chamber, and is used to control the sample level of the ISE chamber to stay in three setting points. All the inlets coupled to the ISE chamber are connected to a manifold first, and then only one pipe is coupled to the cover of the ISE chamber directly. The ISE chamber has an overflow pipe to prevent any cases of level sensor from the abnormal condition. The ISE chamber has a drain in the bottom to empty the chamber completely according to the requirement of the operation. The ISE chamber system has several different operation modes, including measurement, calibration and wash.
HM Chamber
Anode stripping voltammetry (ASV) is a sensitive method to measure the concentration of heavy metals. ASV device is composed of a working glass carbon electrode, a countering electrode, and an Ag/AgCl reference electrode. In our application, the three electrodes of ASV are installed in a chamber, named HM chamber. Fig. 6 illustrates a schematic diagram of the HM chamber.
Six chemical containers are coupled to the HM chamber, and two of them (item TM1 and TM2) hold chemical buffer to adjust the ion strength and measuring condition of the sample solution, and other four of them (item TM3, TM4, TM5 and TM6) holds standard chemical solution for calibrating the electrodes. All the containers are located about 40 cm higher than the HM chamber, and each container has a solenoid valve in the bottom. When the solenoid valve open, the chemical can flow into the HM chamber from the container under the gravity. In Fig below, three sensors (item SM1, SM2 and SM3) are installed near the bottom of the HM chamber as much as possible, and this design can save the standard chemical for the calibration. A motor (item MM) with a small stirrer is installed in the center of the cover of the HM chamber, and is used to mix the solution in the HM chamber. A conductivity level switch (item LSM) with four electrodes (item LM1, LM2, LM3 and LM4) is also installed in the cover of the HM chamber, and is used to control the level of the HM chamber to stay in three setting points. All the inlets coupled to the HM chamber are connected to a manifold first, and then only one pipe is coupled to the cover of the HM chamber directly. The HM chamber has an overflow pipe to prevent any cases of level sensor from abnormal condition. The HM chamber has a drain in the bottom to empty the chamber completely according to the requirement of the operation. The HM chamber system has several different operation modes, including measurement, calibration and wash.
Schematic diagram of the HM chamber
