CN111392878A - Circulating water quality effect on-line monitoring and automatic dosing system - Google Patents
Circulating water quality effect on-line monitoring and automatic dosing system Download PDFInfo
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- CN111392878A CN111392878A CN202010143909.8A CN202010143909A CN111392878A CN 111392878 A CN111392878 A CN 111392878A CN 202010143909 A CN202010143909 A CN 202010143909A CN 111392878 A CN111392878 A CN 111392878A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/04—Oxidation reduction potential [ORP]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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Abstract
The invention discloses a circulating water quality effect on-line monitoring and automatic dosing system, which comprises a circulating water on-line monitoring system, a circulating water quality on-line analysis system and an automatic dosing system, wherein the circulating water on-line monitoring system, the circulating water quality on-line analysis system and the automatic dosing system are respectively and electrically connected with a P L C, and a P L C is electrically connected with a remote control platform, so that three-system linkage is realized, a medicament is continuously and automatically dosed in the whole process, and circulating water quality data is monitored in real time.
Description
Technical Field
The invention belongs to the field of industrial monitoring devices, and particularly relates to a circulating water quality effect online monitoring and automatic dosing system.
Background
The method is one of direct, accurate and effective methods for monitoring the treatment effect of the circulating cooling water by adopting a monitoring heat exchanger, and the main monitoring parameters are corrosion rate, adhesion rate and microbial slime content, wherein the corrosion rate and the adhesion rate are mainly tested by adopting a heat exchanger test tube weightlessness monitoring method, and the microbial content is mainly tested by adopting a slime collection method for testing the content of suspended microorganisms in the circulating water.
The method has wide applicability, but the corrosion rate and the adhesion rate are tested by weighing and calculating after the heat exchanger is monitored to operate for a period of time, and the time interval of each time is about 30 days, so that the test result reflects the average corrosion rate and the adhesion rate of the circulating water, and the fluctuation condition of the corrosion and scaling state of the current circulating water cannot be judged according to the average parameters, so that the water quality control scheme based on the test result seriously lags behind the actual requirement of the water quality control of the circulating water, and the production cannot be guided in time. The microorganism slime is divided into three types, namely a suspension type slime, an attachment type slime and a deposition type slime, and the current collection method test is only suitable for content analysis of the suspension type slime, but is lack of quantitative expression of other two types of slime. In addition, the testing process has high operation requirements on workers and wastes time and labor, and the obtained data is manually registered and sent, so that the efficiency is low. Thereby causing the problem that the dosage of the medicament cannot be adjusted in time according to the result in the control.
At present, most of circulating water systems adopt manual adding of medicaments to achieve the purposes of scale inhibition, corrosion inhibition and sterilization, the adding method has high labor intensity, large influence of human factors influences the cooling effect of circulating water, and causes medicament waste, so that the control of the medicament adding amount in an industrial index range and the stability of water quality indexes are difficult.
Disclosure of Invention
The invention aims to provide an online monitoring and automatic dosing system for the water quality effect of circulating water, which realizes an intelligent online automatic dosing monitoring and controlling system for the circulating water, and realizes the continuous and automatic dosing of a medicament in the whole process and the real-time monitoring of the water quality data of the circulating water.
The invention adopts the technical scheme that the circulating water quality effect on-line monitoring and automatic dosing system comprises a circulating water on-line monitoring system, a circulating water quality on-line analysis system and an automatic dosing system, wherein the circulating water on-line monitoring system, the circulating water quality on-line analysis system and the automatic dosing system are respectively and electrically connected with P L C, and the P L C is electrically connected with a remote control platform.
The present invention is also characterized in that,
the remote control platform is a DCS system.
The circulating water on-line monitoring system comprises a monitoring heat exchanger, wherein a testing pipe and two clapboards are arranged in the monitoring heat exchanger, a sealed cavity is arranged between the two clapboards, and a second water inlet and a second water outlet of the testing pipe respectively penetrate out of one of the clapboards; the top of the monitoring heat exchanger is provided with an air inlet, the bottom of the monitoring heat exchanger is provided with a first water inlet, a first water outlet and an air outlet, and the first water outlet is connected with a water collecting tank; a steam switch valve, a steam pressure reducing valve and a third flow regulating valve are sequentially arranged on an air inlet pipe of the air inlet; a first circulating water switch valve group is arranged on the pipeline of the first water inlet; the second water outlet of the test tube is communicated with the first water outlet, the second water inlet and the second water outlet of the test tube are respectively provided with a temperature detection device and a third temperature detection device, the air inlet of the monitoring heat exchanger is provided with the second temperature detection device, and the first water outlet is provided with a corrosion tester; a third water inlet of a pressure drop monitoring pipe is connected to the side of the circulating water return pipe through a second circulating water switch valve group, a third water outlet of the pressure drop monitoring pipe is connected with a water collecting tank, a pressure difference transmitter is further arranged between the third water inlet and the third water outlet, a second flow regulating valve is arranged between the third water outlet of the pressure drop monitoring pipe and the water collecting tank, and a second flowmeter is arranged on the second flow regulating valve.
The first water inlet and the first water outlet of the monitoring heat exchanger are respectively positioned on one side of the sealed cavity, and the air inlet and the air outlet are positioned between the two clapboards.
And signal output ends of the corrosion tester, the first temperature detection device, the second temperature detection device, the third temperature detection device, the first flow meter, the differential pressure meter, the second flow meter, the first flow regulating valve, the second flow regulating valve and the third flow regulating valve are electrically connected with a signal receiving end of P L C.
And a bypass is arranged on the second water outlet of the monitoring heat exchange tube and the second water outlet pipe of the water collecting tank, and a piece hanging device is arranged on the bypass.
The circulating water quality on-line analysis system comprises a third circulating water switch valve group and a fourth water outlet which are sequentially arranged on a pipeline, and a flow switch, a pH analyzer, an ORP analyzer, a conductivity analyzer, a free chlorine analyzer, a turbidity analyzer, a fluorescence tracing analyzer and a total phosphorus/normal phosphorus analyzer which are respectively and sequentially and electrically connected with a P L C, wherein a sampling port is connected on the pipeline behind the total phosphorus/normal phosphorus analyzer.
The automatic dosing system comprises a first dosing box, a second dosing box, a third dosing box and a fourth dosing box;
the first dosing tank is connected with a sulfuric acid dosing device, a first liquid level meter is arranged at the upper part of the first dosing tank, a dosing port of the first dosing tank is divided into two paths and is respectively connected with a first metering pump and a second metering pump, and the outlet of each of the first metering pump and the second metering pump is a first dosing point; the second dosing tank is connected with a corrosion inhibitor dosing device, a second liquid level meter is arranged at the upper part of the second dosing tank, a dosing port of the second dosing tank is divided into two paths and is respectively connected with a third metering pump and a fourth metering pump, and the outlet of the third metering pump and the outlet of the fourth metering pump are second dosing points; the third dosing tank is connected with a scale inhibitor dosing device, a third liquid level meter is arranged at the upper part of the third dosing tank, a dosing port of the third dosing tank is divided into two paths and is respectively connected with a fifth metering pump and a sixth metering pump, and the fifth metering pump and the sixth metering pump are respectively connected with a sixth safety valve and a sixth drain valve, and the outlet of the sixth drain valve is a third dosing point; the fourth dosing tank is connected with a bactericide dosing device, a fourth liquid level meter is arranged at the upper part of the fourth dosing tank, a dosing port of the fourth dosing tank is divided into two paths and is respectively connected with a seventh metering pump and an eighth metering pump, and the outlet of the seventh metering pump and the eighth metering pump is a fourth dosing point.
The first liquid level meter, the second liquid level meter, the third liquid level meter, the fourth liquid level meter, the first metering pump, the second metering pump, the third metering pump, the fourth metering pump, the fifth metering pump, the sixth metering pump, the seventh metering pump and the eighth metering pump are respectively and electrically connected with the P L C.
The invention has the advantages that the real-time monitoring technology is adopted, the online corrosion rate replaces the average corrosion rate, the online calculated thermal resistance replaces the average adhesion rate, the online pressure drop monitoring pipe monitors the pressure drop to replace the biological slime amount, thereby realizing the online monitoring of corrosion, scaling and biological slime in the circulating water treatment effect, and simultaneously integrating the online measurement mode into an integrated online monitoring system to realize the real-time transmission of data and achieve the purpose of online monitoring the circulating water treatment effect.
Drawings
FIG. 1 is a schematic structural diagram of an on-line monitoring system of a circulating water quality effect on-line monitoring and automatic dosing system of the invention;
FIG. 2 is a schematic structural diagram of a circulating water quality on-line analysis system of the circulating water quality effect on-line monitoring and automatic dosing system of the invention;
FIG. 3 is a schematic structural view of an automatic dosing system of the on-line monitoring and automatic dosing system for the water quality effect of circulating water.
In the figure, 101, a first circulating water switch valve group, 102, a monitoring heat exchanger, 103, a first temperature detection device, 104, a second temperature detection device, 105, a test pipe, 106, a partition plate, 107, a second temperature detection device, 108, a first flow meter, 109, a first flow regulating valve, 1010, a corrosion rate meter, 1011, a hanger, 1012, a cooling tower sump, 1013, a steam switch valve, 1014, a steam pressure reducing valve, 1015, a third flow regulating valve, 1016, a pressure gauge, 1017, a second circulating water switch valve group, 1018, a pressure drop monitoring pipe, 1019, a pressure difference transmitter, a second flow meter, a second flow regulating valve, 201, a third circulating water switch valve group, 202, a flow switch, 203, a pH analyzer, 204, an ORP analyzer, 205, a conductivity analyzer, 206, a free chlorine analyzer, 207, a turbidity analyzer, 208, a fluorescence analyzer, 209, a total phosphorus/positive phosphorus analyzer, 2010, a first pH analyzer, 301, a conductivity analyzer, a fourth linear meter, a third linear meter, a fourth linear meter, a third linear meter, a fourth linear meter.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a circulating water quality effect online monitoring and automatic dosing system which comprises a circulating water online monitoring system 1, a circulating water quality online analysis system 2 and an automatic dosing system 3, wherein the circulating water online monitoring system 1, the circulating water quality online analysis system 2 and the automatic dosing system 3 are respectively and electrically connected with a P L C4, a P L C4 is electrically connected with a remote control platform 5, and the remote control platform 5 can be a DCS (distributed control system).
The online monitoring system 1 for the water quality effect of the circulating water, as shown in fig. 1, comprises a monitoring heat exchanger 102, a test tube 105 and two partition plates 106 are arranged in the monitoring heat exchanger 102, a sealed cavity is arranged between the two partition plates 106, a second water inlet of the test tube 105 penetrates out from one partition plate 106, a second water outlet of the test tube 105 penetrates out from the other partition plate 106, and certain gaps are formed between the second water inlet and the second water outlet of the test tube 105 and the inner side wall of the monitoring heat exchanger 102; the top of the monitoring heat exchanger 102 is provided with an air inlet, the bottom of the monitoring heat exchanger 102 is provided with a first water inlet, a first water outlet and an air outlet, circulating water firstly enters from the first water inlet through a first water inlet pipe, and then is discharged into the water collecting tank 1012 from the first water outlet through a first water outlet pipe, the first water inlet is positioned on one side of the sealed cavity, the first water outlet is positioned on the other side of the sealed cavity, the air inlet and the air outlet are positioned between the two partition plates 106, and therefore after the circulating water switch valve 101 is opened, the circulating water can stably flow through the monitoring heat exchanger 102, and the measuring result cannot be influenced by fluctuation.
The steam is introduced from the air inlet through the air inlet pipe, the air inlet pipe is sequentially provided with a steam switch valve 1013, a steam reducing valve 1014 and a third flow regulating valve 1015, the pressure of the steam can be regulated through the reducing valve 1014, and the temperature of the steam discharged into the monitoring heat exchanger 102 is controlled.
A first circulating water switch valve group 101 is arranged on a pipeline for introducing circulating water into the water inlet and comprises a filter; the second water outlet of the test tube 105 is communicated with the first water outlet of the monitoring heat exchanger 102, the second water inlet of the test tube 105 is provided with a first temperature detection device 103, the air inlet of the monitoring heat exchanger 102 is provided with a second temperature detection device 104, the second water outlet of the test tube 105 is provided with a third temperature detection device 107, the first water outlet of the monitoring heat exchanger 102 is provided with a corrosion tester 1010, and the water outlet pipeline is provided with a first flowmeter 108 and a first flow regulating valve 109.
The signal receiving end of the P L C4 is respectively and electrically connected with the signal output end of the corrosion tester 1010, the signal output end of the first temperature detection device 103, the signal output end of the second temperature detection device 104, the signal output end of the third temperature detection device 107 and the first flowmeter 108, the signal output end of the P L C4 is electrically connected with the remote control platform 5, the P L C4 can display the detected corrosion, temperature and flow information and transmit the information to the remote control platform 5, and the remote control platform 5 finally calculates the real-time corrosion rate and fouling resistance of the test tube according to the information.
Fouling resistance R of test tube 105 at time ttThe calculation formula of (2) is as follows:
in the formula: r0For testing the thermal resistance of the tube, the unit is m2·K/W；RtThe unit is m 2K/W for instantaneous fouling resistance; g is the recirculated cooling water flow, i.e. the reading of the first flow meter 108; t is t1Is the circulating cooling water instantaneous inlet temperature, i.e. the reading of the first temperature detection means 103; t is t2The instantaneous outlet temperature of the circulating cooling water, that is, the degree of the third temperature detection means 107; t'1The temperature of the circulating cooling water inlet at the beginning of the test tube is measured; t'2The outlet temperature of the circulating cooling water at the beginning of the test tube is measured; t is the steam temperature, i.e. the reading of the second temperature detection means 4; diTo test tube inside diameter, L is the effective heat transfer length of the test tube.
Wherein R is0The calculation formula of (2) is as follows:
the method for taking the values of the inlet temperature and the outlet temperature of the circulating cooling water of the test tube 105 at the beginning comprises the following steps: after the steam temperature, the circulating water flow and the inlet water temperature reach specified values and are stabilized for 2-6 h, the temperature of the second water inlet and the second water outlet of the test tube 105 can be measured for 8 times every 15-30 min, abnormal values are eliminated by a mathematical statistical method, and the arithmetic mean value of the abnormal values is worked out.
In addition, a bypass is arranged on a second water outlet pipe connecting the second water outlet of the monitoring heat exchange pipe 102 and the water collecting tank 1012, a hanging piece device 1011 is arranged on the bypass, and the average corrosion rate of the circulating water can be detected by a traditional weightlessness mode by opening the bypass to enable the circulating water to flow through the hanging piece device 1011 at a certain speed.
A third water inlet of a pressure drop monitoring pipe 1018 is connected to the side of the circulating water return pipeline through a second circulating water switch valve block 1017, a third water outlet of the pressure drop monitoring pipe 1018 is connected with the water collecting tank 1012, a differential pressure transmitter 1019 is further arranged between the third water inlet and the third water outlet, a second flow regulating valve 1021 is arranged between the third water outlet of the pressure drop monitoring pipe 1018 and the water collecting tank 1012, and a second flow meter 1020 is arranged on the second flow regulating valve 1021.
The first flow regulating valve 109, the second flow regulating valve 1021 and the third flow regulating valve 1015 are electric regulating valves respectively, a signal input end of the first flow regulating valve 109, a signal input end of the second flow regulating valve 1021 and a signal input end of the third flow regulating valve 1015, a signal output end of the differential pressure meter 1019 and a signal output end of the second flow meter 1020 are electrically connected with a signal input end of P L C4 respectively, a worker can regulate the flow of circulating water discharged into the monitoring heat exchange pipe 102 and the pressure drop monitoring pipe 1018 through the P L C4, and can display and send the received differential pressure signal and flow signal to the remote control platform 5 to be used as parameters for analyzing the biological slime amount.
The pipelines for circulating water to enter the first circulating water switch valve group 101 and the second circulating water switch valve group 1017 are provided with filter screens, so that impurities in the circulating water can be prevented from being discharged into the monitoring heat exchanger 102 and the pressure drop monitoring pipe 1018 to influence the detection result.
As shown in fig. 2, in the online analysis system 2 for quality of circulating water, after circulating water sequentially passes through the third circulating water switch valve group 201 and the fourth water outlet 2010, the circulating water is respectively connected with the flow switch 202, the pH analyzer 203, the ORP analyzer 204, the conductivity analyzer 205, the free chlorine analyzer 206, the turbidity analyzer 207, the fluorescence tracer analyzer 208 and the total phosphorus/phosphorus analyzer 209 to sequentially monitor corresponding analysis indexes, and a pipeline behind the total phosphorus/phosphorus analyzer 209 is provided with a sampling port 2011.
The signal receiving end of the P L C4 is respectively electrically connected with the output end of the flow switch 202, the signal output end of the pH analyzer 203, the signal output end of the ORP analyzer 204, the signal output end of the free chlorine analyzer 206 of the signal output end of the conductivity analyzer 205, the signal output end of the turbidity analyzer 207, the signal output end of the fluorescent tracer analyzer 208, the output end of the total phosphorus/phosphorus analyzer 209 and the flow switch 202, the signal output end of the P L C4 is electrically connected with the remote control platform 5, the P L C4 can display the detected information of the flow switch 202, the pH analyzer 203, the ORP analyzer 204, the conductivity analyzer 205, the free chlorine analyzer 206, the turbidity analyzer 207, the fluorescent tracer analyzer 208 and the total phosphorus/phosphorus analyzer 209 and transmit the information to the remote control platform 5, and the remote control platform 5 finally judges the quality of the circulating water according to the information.
The circulating water is provided with the filter screen on letting in third circulating water switch valves 201 pipeline, can prevent that the impurity in the circulating water from discharging into quality of water on-line analysis device, influences the testing result.
As shown in fig. 3, the automatic medicine adding system 3 includes a first medicine adding box 301, a second medicine adding box 3019, a third medicine adding box 3037, and a fourth medicine adding box 3055.
The first dosing tank 301 is connected with a sulfuric acid dosing device 3018, the lower portion of the first dosing tank 301 is provided with a first sewage draining valve 303 and a dosing port, the upper portion of the first dosing tank 301 is provided with a first liquid level meter 302, a first Y-shaped filter 304 and a first flow calibration column 305 are sequentially arranged on a dosing port connecting pipeline of the first dosing tank 301, the pipeline is divided into two paths after passing through the first flow calibration column 305 and is respectively connected with a first metering pump 307 and a second metering pump 3010, the first metering pump 307 is respectively connected with a first safety valve 306 and a first purging valve 308, the second metering pump 3010 is respectively connected with a second safety valve 309 and a second purging valve 3011, outlet pipelines of the first metering pump 307 and the second metering pump 3010 are sequentially connected with a first pulse damper 3012, a first diaphragm pressure gauge 3013, a first backpressure valve 3014, a first check valve 3015, a first switch valve 3016 and a first dosing point 3017 after confluence.
The second dosing tank 3019 is connected with a corrosion inhibitor dosing device 3036, the upper part of the second dosing tank 3019 is provided with a second liquid level meter 3020, a dosing port of the second dosing tank 3019 is connected with a pipeline which is sequentially provided with a second Y-shaped filter 3022 and a second flow calibration column 3023, the pipeline is divided into two paths after passing through the first flow calibration column 3023 and is respectively connected with a third metering pump 3025 and a fourth metering pump 3028, the third metering pump 3025 is respectively connected with a third safety valve 3024 and a third purge valve 3026, the fourth metering pump 3028 is respectively connected with a fourth safety valve 3027 and a fourth purge valve 3029, outlet pipelines of the third metering pump 3025 and the fourth metering pump 3028 are converged and then sequentially connected with a second pulse damper 3030, a second diaphragm pressure gauge 3031, a second backpressure valve 3032, a second check valve 3033, a second switch valve 3034 and a second dosing point 3035.
The third dosing tank 3037 is connected with a scale inhibitor dosing device 3054, a third liquid level meter 3038 is arranged at the upper part of the third dosing tank 3037, a third Y-shaped filter 3040 and a third flow rate calibration column 3041 are sequentially arranged on a dosing port connecting pipeline of the third dosing tank 3037, the pipeline is divided into two paths after passing through the third flow rate calibration column 3041 and is respectively connected with a fifth metering pump 3043 and a sixth metering pump 3046, the fifth metering pump 3043 is respectively connected with a fifth safety valve 3042 and a fifth purge valve 3044, the sixth metering pump 3046 is respectively connected with a sixth safety valve 3045 and a sixth purge valve 3047, and outlet pipelines of the fifth metering pump 3043 and the sixth metering pump 3046 are sequentially connected with a third pulse damper 3048, a third diaphragm pressure gauge 3049, a third back pressure valve 3050, a third check valve 3051, a third switch valve 3052 and a third dosing point 3053 after confluence.
The fourth dosing tank 3055 is connected with a bactericide feeding device 3072, the upper part of the fourth dosing tank 3055 is provided with a fourth liquid level meter 3056, a fourth Y-shaped filter 3058 and a fourth flow calibration column 3059 are sequentially arranged on a medicine feeding port connecting pipeline of the fourth dosing tank 3055, the pipeline is divided into two paths after passing through the fourth flow calibration column 3059 and is respectively connected with a seventh metering pump 3061 and an eighth metering pump 3064, the seventh metering pump 3061 is respectively connected with a seventh safety valve 3060 and a seventh purge valve 3062, the eighth metering pump 3064 is respectively connected with an eighth safety valve 3063 and an eighth purge valve 3065, outlet pipelines of the seventh metering pump 3061 and the eighth metering pump 3064 are respectively connected with a fourth pulse damper 3066, a fourth diaphragm pressure gauge 3067, a fourth backpressure valve 3068, a fourth back pressure 3069, a fourth switching check valve 3070 and a fourth medicine feeding point 3071 after converging.
The liquid level meter comprises a first liquid level meter 302, a second liquid level meter 3020, a third liquid level meter 3038 and a fourth liquid level meter 3056, wherein a first metering pump 307, a second metering pump 3010, a third metering pump 3025, a fourth metering pump 3028, a fifth metering pump 3043, a sixth metering pump 3046, a seventh metering pump 3061 and an eighth metering pump 3064 are respectively and electrically connected with a P L C4, and the P L C4 is connected with a remote control platform 5.
The medicine inlet is provided with a filter, and the medicine liquid is introduced into the medicine adding pipeline and is provided with a filter screen, so that impurities in the medicine liquid can be prevented from entering the metering pump and affecting the service life of the pump.
Claims (9)
1. The utility model provides a circulating water quality of water effect on-line monitoring and automatic reagent feeding system, its characterized in that, includes circulating water on-line monitoring system (1), circulating water quality of water on-line analysis system (2) and automatic reagent feeding system (3), circulating water on-line monitoring system (1), circulating water quality of water on-line analysis system (2) and automatic reagent feeding system (3) are electrically connected with P L C (4) respectively, and P L C (4) electricity is connected with remote control platform (5).
2. The on-line monitoring and automatic dosing system for the water quality effect of the circulating water as claimed in claim 1, wherein the remote control platform (5) is a DCS system.
3. The on-line monitoring and automatic dosing system for the water quality effect of the circulating water as claimed in claim 1, wherein the on-line monitoring system (1) for the circulating water comprises a monitoring heat exchanger (102), a test tube (105) and two partition plates (106) are arranged in the monitoring heat exchanger (102), a sealed cavity is arranged between the two partition plates (106), and a second water inlet and a second water outlet of the test tube (105) respectively penetrate through one of the partition plates (106); the top of the monitoring heat exchanger (102) is provided with an air inlet, the bottom of the monitoring heat exchanger (102) is provided with a first water inlet, a first water outlet and an air outlet, and the first water outlet is connected with a water collecting tank (1012); a steam switch valve (1013), a steam reducing valve (1014) and a third flow regulating valve (1015) are sequentially arranged on an air inlet pipe of the air inlet; a first circulating water switch valve group (101) is arranged on the pipeline of the first water inlet; a second water outlet of the test tube (105) is communicated with the first water outlet, a second water inlet and a second water outlet of the test tube (105) are respectively provided with a temperature detection device (103) and a third temperature detection device (107), an air inlet of the monitoring heat exchanger (102) is provided with a second temperature detection device (104), and the first water outlet is provided with a corrosion tester (1010);
a third water inlet of a pressure drop monitoring pipe (1018) is connected to the side of the circulating water return pipeline through a second circulating water switch valve group (1017), a third water outlet of the pressure drop monitoring pipe (1018) is connected with a water collecting tank (1012), a pressure difference transmitter (1019) is further arranged between the third water inlet and the third water outlet, a second flow regulating valve (1021) is arranged between the third water outlet of the pressure drop monitoring pipe (1018) and the water collecting tank (1012), and a second flow meter (1020) is arranged on the second flow regulating valve (1021).
4. The on-line monitoring and automatic dosing system for the water quality effect of the circulating water as claimed in claim 3, wherein the first water inlet and the first water outlet of the monitoring heat exchanger (102) are respectively located at one side of the sealed cavity, and the air inlet and the air outlet are both located between the two partition plates (106).
5. The on-line monitoring and automatic dosing system for the water quality effect of the circulating water according to claim 3, wherein signal output ends of the corrosion tester (1010), the first temperature detection device (103), the second temperature detection device (104), the third temperature detection device (107), the first flow meter (108), the differential pressure meter (1019), the second flow meter (1020), the first flow regulating valve (109), the second flow regulating valve (1021) and the third flow regulating valve (1015) are electrically connected with a signal receiving end of P L C (4).
6. The on-line monitoring and automatic dosing system for the water quality effect of circulating water as claimed in claim 3, wherein a bypass is provided on the second water outlet of the monitoring heat exchange tube (102) and the second water outlet pipe of the water collecting tank (1012), and a hanging piece device (1011) is provided on the bypass.
7. The on-line monitoring and automatic dosing system for the water quality effect of the circulating water as claimed in claim 1, wherein the on-line analyzing system (2) for the water quality of the circulating water comprises a third circulating water switch valve group (201) and a fourth water outlet (2010) which are sequentially arranged on a pipeline, and a flow switch (202), a pH analyzer (203), an ORP analyzer (204), a conductivity analyzer (205), a free chlorine analyzer (206), a turbidity analyzer (207), a fluorescence tracer analyzer (208) and a total phosphorus/phosphorus analyzer (209) which are respectively and sequentially electrically connected with P L C (4), wherein a sampling port (2011) is connected on the pipeline behind the total phosphorus/phosphorus analyzer (209).
8. The on-line monitoring and automatic dosing system for the water quality effect of the circulating water according to claim 1, wherein the automatic dosing system (3) comprises a first dosing tank (301), a second dosing tank (3019), a third dosing tank (3037) and a fourth dosing tank (3055);
the first dosing tank (301) is connected with a sulfuric acid dosing device (3018), a first liquid level meter (302) is arranged at the upper part of the first dosing tank (301), a dosing port of the first dosing tank (301) is divided into two paths and is respectively connected with a first metering pump (307) and a second metering pump (3010), and outlets of the first metering pump (307) and the second metering pump (3010) are first dosing points (3017); the second dosing tank (3019) is connected with a corrosion inhibitor dosing device (3036), a second liquid level meter (3020) is arranged at the upper part of the second dosing tank (3019), a dosing port of the second dosing tank (3019) is divided into two paths to be respectively connected with a third metering pump (3025) and a fourth metering pump (3028), and outlets of the third metering pump (3025) and the fourth metering pump (3028) are second dosing points (3035); the third dosing tank (3037) is connected with a scale inhibitor dosing device (3054), a third liquid level meter (3038) is arranged at the upper part of the third dosing tank (3037), a dosing port of the third dosing tank (3037) is divided into two paths to be respectively connected with a fifth metering pump (3043) and a sixth metering pump (3046), and the fifth metering pump (3043) and the sixth metering pump (3046) are respectively connected with a sixth safety valve (3045) and a sixth discharge valve (3047), and the outlets of the sixth safety valve and the sixth discharge valve are respectively a third dosing point (3053); the fourth dosing tank (3055) is connected with a bactericide dosing device (3072), a fourth liquid level meter (3056) is arranged at the upper part of the fourth dosing tank (3055), a dosing port of the fourth dosing tank (3055) is divided into two paths to be respectively connected with a seventh metering pump (3061) and an eighth metering pump (3064), and outlets of the seventh metering pump (3061) and the eighth metering pump (3064) are a fourth dosing point (3071).
9. The on-line monitoring and automatic dosing system for the water quality effect of circulating water as claimed in claim 8, wherein the first liquid level meter (302), the second liquid level meter (3020), the third liquid level meter (3038), the fourth liquid level meter (3056), the first metering pump (307), the second metering pump (3010), the third metering pump (3025), the fourth metering pump (3028), the fifth metering pump (3043), the sixth metering pump (3046), the seventh metering pump (3061), and the eighth metering pump (3064) are respectively electrically connected with P L C (4).
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| CN115180743A (en) * | 2022-07-27 | 2022-10-14 | 东莞市珀蓝特机电设备有限公司 | Automatic cleaning device for cooling tower |
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