CN111003838A - Automatic water quality monitoring and dosing system for diesel engine circulating cooling water - Google Patents
Automatic water quality monitoring and dosing system for diesel engine circulating cooling water Download PDFInfo
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- CN111003838A CN111003838A CN201911178835.5A CN201911178835A CN111003838A CN 111003838 A CN111003838 A CN 111003838A CN 201911178835 A CN201911178835 A CN 201911178835A CN 111003838 A CN111003838 A CN 111003838A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
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- C02F2101/101—Sulfur compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
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- 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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- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/29—Chlorine compounds
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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
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Abstract
A water quality automatic monitoring and dosing system of diesel engine circulating cooling water comprises a circulating filtration loop, a water quality monitoring loop, a dosing device and an automatic control display device; the automatic control display device compares water quality monitoring data with stored water quality index parameters and correlation curve relation data of medicament concentration in the cooling water, and when the medicament concentration in the cooling water is lower than the correlation curve relation data, the automatic control display device controls the medicament adding device to inject an anti-rust maintenance medicament into the circulating filter loop, so that an automatic medicament adding function is realized; when the concentration of the medicament reaches the preset correlation curve relation data, the automatic control display device controls the dosing device to stop working, so that the water quality index of the diesel engine circulating cooling water is stably controlled and kept in a normal range. The invention realizes automatic monitoring and maintenance of the diesel engine circulating cooling water system, improves the reliability of the cooling water circulating system and lightens the working strength.
Description
Technical Field
The invention relates to an antirust maintenance process of a diesel engine, in particular to an automatic water quality monitoring and dosing system for diesel engine circulating cooling water, and belongs to the technical field of marine diesel engines.
Background
The circulating cooling water system of the diesel engine mainly cools the combustion chamber parts of a main engine and is an indispensable part in the normal operation of the diesel engine. The average temperature of the cooling water of the main engine is about 80 ℃, the pressure can reach 5-6 bar at most, the cooling water pipe is made of carbon steel, the cooling water system is in a high-temperature and high-pressure working environment for a long time, the main engine does not run all the time, when the main engine is started and stopped, the water is not filled in the water pipe of the cooling water system, steam generated by the high-temperature cooling water is in contact with the inner wall of the cooling water steel pipe, so that rusting is easily caused, the cooling water is polluted due to the rusting which is accumulated all the year round, the pipe system is damaged, and the pipeline is easily dirty and blocked, so that the cooling effect of the diesel engine is greatly reduced, and finally the performance parameters of the diesel.
Because the cooling water system is in the operation in-process, the further rust-resistant treatment can not be carried out to the condenser tube inner wall, consequently under the circumstances that guarantees that host computer cooling efficiency is not influenced, can add rust-resistant maintenance agent in the medium of recirculated cooling water usually. However, the existing diesel engine circulating cooling water system is lack of real-time monitoring on water quality, and the dosing is also carried out manually, so that the change of the water quality cannot be timely mastered, and the antirust maintenance agent cannot be added, so that the aim of automatically monitoring and maintaining the diesel engine circulating cooling water system is fulfilled, and how to timely and effectively monitor and maintain the diesel engine cooling water system becomes a long-standing industrial problem.
Disclosure of Invention
The invention aims to solve the problem of difficulty in monitoring, maintaining and maintaining a cooling water system of a diesel engine, and provides an automatic water quality monitoring and dosing system for circulating cooling water of the diesel engine, which realizes online real-time water quality monitoring and automatic dosing maintenance of the circulating cooling water system of the diesel engine.
In order to achieve the above object, the technical solution of the present invention is as follows:
the utility model provides a quality of water automatic monitoring and medicine system of diesel engine recirculated cooling water which characterized in that: quality of water automatic monitoring and medicine system includes:
the circulating filtering loop is used for filtering and purifying circulating cooling water and comprises a water tank, a water inlet filter, a circulating pump and a filter bag filter; the water tank is used for storing cooling water and is provided with a water outlet and a water return port, the water inlet filter, the circulating pump and the filter bag filter are sequentially connected between the water outlet and the water return port through pipelines, a sampling water leading-out port and a medicine adding port are sequentially arranged between the filter bag filter and the water return port, the sampling water leading-out port is positioned behind the filter bag filter and in front of the medicine adding port, the cooling water from the water tank is filtered by the water inlet filter and then is sent into the filter bag filter by the circulating pump for filtering, and the filtered cooling water returns to the water tank;
the water quality monitoring loop is used for detecting the water quality of the cooling water in the circulating and filtering loop in real time and comprises a sampling water pre-processor, a pH meter, a conductivity meter, a water hardness meter, a chloride ion analyzer, a silicate analyzer and a sulfate radical analyzer; the upstream of the sampling water pre-processor is connected with the sampling water outlet, and the downstream of the sampling water pre-processor is respectively connected with the pH meter, the conductivity meter, the water hardness meter, the chloride ion analyzer, the silicate analyzer and the sulfate radical analyzer, and then is uniformly connected with the water tank through a pipeline;
the dosing device is used for adding an antirust maintenance agent to the water tank and comprises an agent tank, a metering cylinder and a metering pump; the agent tank is stored with an antirust maintenance agent for improving water quality, the upstream of the metering pump is connected with the agent tank and the metering cylinder, and the downstream of the metering pump is connected with the agent adding port;
the automatic control display device comprises a PLC controller and a touch display screen; the PLC is respectively connected with a circulating pump of the circulating filtration loop, a water preprocessor of the water quality monitoring loop, a pH meter, a conductivity meter, a water hardness meter, a chloride ion analyzer, a silicate group analyzer, a sulfate group analyzer and a metering pump of the dosing device, the PLC stores pre-calibrated correlation curve relation data of water quality index parameters and medicament concentration in cooling water, the touch display screen is connected with and communicates with the PLC, and the monitoring data and control information of the PLC are displayed and man-machine conversation is realized;
the water quality monitoring loop carries out real-time water quality detection on the sampled cooling water and transmits water quality monitoring data to the PLC, the PLC carries out comparison processing on the water quality monitoring data and stored association curve relation data of water quality index parameters and medicament concentration in the cooling water, and when the medicament concentration in the cooling water is lower than the association curve relation data, the PLC sends an instruction to control the metering pump to inject rust-proof maintenance medicament into the water tank through the medicament feeding port, so that the automatic medicament feeding function is realized; when the concentration of the medicament in the cooling water reaches the preset incidence curve relation data, the PLC controls the metering pump to stop working, so that the on-line real-time monitoring and automatic dosing maintenance of the cooling water quality are realized, and the water quality index of the diesel engine circulating cooling water is stably controlled and kept in a normal range.
As a further improvement, the normal range of the water quality index of the circulating cooling water is as follows:
pH value: 0-14,
conductivity: 0 to 10000uS/cm,
water hardness: CaCO3，0-1000ppm，
Chloride ion: 1.8-355ppm of a catalyst,
silicate radical: 0 to 5ppm of a nitrogen-containing compound,
sulfate radical: 0-200 ppm.
As a further improvement, when the water quality index of the circulating cooling water exceeds the normal range, the system gives an alarm.
As a further improvement, a thermometer before the pump and a pressure gauge before the pump are arranged on a pipeline behind the water inlet filter and before the circulating pump so as to monitor the water temperature and the water pressure of cooling water in the circulating filtering loop, and the thermometer before the pump and the pressure gauge before the pump are both connected with the controller and transmit monitoring data.
As a further improvement, a front pressure gauge and a rear pressure gauge are respectively arranged in front of and behind the filter bag filter to monitor the filth blockage condition of the filter bag and facilitate prompting of filter bag replacement, the front pressure gauge and the rear pressure gauge are both connected with the controller and used for conveying monitoring data, and when the pressure difference between the front part and the rear part of the filter bag filter is too large, the touch display screen gives an alarm to prompt of filter bag replacement.
As a further improvement, a front valve and a rear valve are respectively arranged at the front and the rear of the filter bag filter, and a bypass valve is connected in parallel with the filter bag filter, so that the filter bag can be conveniently replaced and maintained, and the bypass valve is opened when the filter bag is replaced.
As a further improvement, the sampling water pre-processor comprises a thermometer which detects the temperature of the sampled cooling water in real time and inputs monitoring data into the controller, and the controller controls the sampling water pre-processor to adjust the temperature and the flow of the sampled cooling water in an air cooling mode so as to be suitable for detection.
As a further improvement, when the water quality monitoring loop works, the effectiveness of the instrument monitoring data is linked with the starting of the circulating pump; when the dosing device works, the metering pump is linked with the circulating pump.
As a further improvement, a USB interface is arranged on the touch display screen, and monitoring data are output to a U disk so as to be further processed.
As a further improvement, the actual flow rate of the metering pump is controlled by the controller in a time-proportional manner according to the correlation curve of the water quality monitoring data and the medicament concentration, and the actual flow rate of the metering pump is corrected by the metering cylinder.
Compared with the prior art, the invention achieves the following beneficial effects:
1. the on-line real-time monitoring of the quality of the diesel engine circulating cooling water is realized, the sensitivity and the reliability of the water quality monitoring are improved, the automatic control of the cooling water dosing is realized, and the automatic monitoring and the maintenance of the diesel engine circulating cooling water system are realized.
2. The circulating cooling water is filtered and purified, so that impurities, garbage and oil stains in the cooling water are removed, the cleanness of the quality of the cooling water is ensured, the high-quality recycling of the cooling water is realized, and the reliability of a cooling water circulating system is improved.
3. The whole set of device is sled piece integrated form design, places and is not limited to fixed place, can shift at any time and install convenient to use is swift.
4. In case the system is installed, only people need to be sent regularly to maintain, all the dosing, alarm monitoring and filtering processes are automatically controlled, and the working intensity of operators is greatly reduced.
5. The monitoring data can be stored and output, and further data processing is facilitated.
Drawings
Fig. 1 is a schematic diagram of the structural principle of the present invention.
Fig. 2 is a schematic diagram of the structure of the automatic control display device.
Fig. 3 is a schematic diagram of the electrical part.
In the figure, 1-water tank, 2-water inlet filter, 3-circulating pump, 4-filter bag filter, 5-sample water pre-processor, 6-pH meter, 7-medicament tank, 8-metering cylinder, 9-metering pump, A-water outlet, B-water return port, C-sample water outlet, D-medicament adding port, T1-pre-pump thermometer, T2-thermometer, P1-pre-pump pressure gauge, P2-pre-pressure gauge, P3-post-pressure gauge, V1-pre-valve, V2-post-valve, V3-bypass valve, CN-conductivity meter, H-water hardness meter, CL-chloride ion analyzer, SI-silicate analyzer, SO-sulfate analyzer.
Detailed Description
The invention relates to a water quality automatic monitoring and dosing system of diesel engine circulating cooling water, which is shown in figure 1 and comprises a circulating filtration loop, a water quality monitoring loop, a dosing device and an automatic control display device; the four components realize a skid block integrated structure to facilitate device transfer and transportation. Now, the following are described separately.
The circulating and filtering loop is used for filtering and purifying circulating cooling water and comprises a water tank 1, a water inlet filter 2, a circulating pump 3 and a filter bag filter 4.
The water tank 1 is used for storing cooling water and is provided with a water outlet a and a water return port B, and the water outlet a and the water return port B should be located at opposite positions on both sides of the water tank 1 so as not to cut off the flow in order to uniformly distribute the added chemicals in the water tank 1. The water inlet filter 2, the circulating pump 3 and the filter bag filter 4 are sequentially connected between the water outlet A and the water return port B through pipelines, and the water outlet A and the water return port B are connected with the pipelines through flanges. The water inlet filter 2 is a Y-shaped 50-micron filter, and the circulating pump 3 is a centrifugal pump. After being filtered by the water inlet filter 2, the cooling water (fresh water) from the water tank 1 is sent to the filter bag filter 4 by the circulating pump 3 for filtering, and the filtered cooling water returns to the water tank 1. A sampling water leading-out port C and a medicine adding port D are sequentially arranged between the filter bag filter 4 and the water return port B, and the sampling water leading-out port C is positioned behind the filter bag filter 4 and in front of the medicine adding port D. A pre-pump thermometer T1 and a pre-pump pressure gauge P1 are arranged on a pipeline behind the water inlet filter 2 to monitor the water temperature and the water pressure of cooling water in the pipeline in front of the circulating pump 3, and the pre-pump thermometer T1 and the pre-pump pressure gauge P1 are primary meters for alarm. A front valve V1 and a rear valve V2 are respectively arranged at the front and the rear of the filter bag filter 4, and a bypass valve V3 is connected in parallel with the filter bag filter 4, so that the filter bag can be conveniently replaced and the filter bag filter 4 can be conveniently maintained; the front and back of the filter bag filter 4 are respectively provided with a front pressure gauge P2 and a back pressure gauge P3 to monitor the filth blockage condition of the filter bag, so as to prompt the filter bag to be replaced in time, and the front pressure gauge P2 and the back pressure gauge P3 are primary meters.
All monitoring signals of the pre-pump thermometer T1, the pre-pump pressure gauge P1, the front pressure gauge P2 and the rear pressure gauge P3 enter the PLC, and a basis is provided for maintenance of the diesel engine circulating cooling water system.
The water quality monitoring loop is connected with a sampling water outlet C of the circulating and filtering loop and is used for detecting the water quality of the cooling water in the circulating and filtering loop in real time; the water quality monitoring circuit comprises a water sampling pre-processor 5, a pH meter 6, a conductivity meter CN, a water hardness meter H, a chloride ion analyzer CL, a silicate analyzer SI and a sulfate analyzer SO.
The upstream of the sampling water pre-processor 5 is connected with the sampling water outlet C, and the downstream is respectively connected with the pH meter 6, the conductivity meter CN, the water hardness meter H, the chloride ion analyzer CL, the silicate analyzer SI and the sulfate radical analyzer SO, and then is uniformly connected with the water tank 1 through a pipeline. The sampling water pre-processor 5 adjusts the temperature and flow rate of the sampling water in an air cooling mode and the like to be suitable for detection, and the sampling water pre-processor 5 comprises a thermometer T2, a cooling box, a fan, a flow meter, a regulating valve and the like. And the sampled water is led out from the bag filter 4, is shunted to each instrument through the regulating valve and finally returns to the water tank 1, the signal detected by each instrument is input into the PLC and is displayed by the touch screen, and the effectiveness of the instrument monitoring data is linked with the starting of the circulating pump.
The dosing device is connected with a dosing port D of the circulating filtration loop and is used for adding an antirust maintenance agent to the water tank 1; the dosing device comprises a medicament tank 7, a metering cylinder 8 and a metering pump 9.
The agent tank 7 is stored with antirust maintenance agent for improving water quality, and the volume is 0.1M3The upstream of the metering pump 9 is connected with the medicament tank 7 and the metering cylinder 8, and the downstream is connected with the medicament feeding port D. The rust-proof maintenance agent is pumped into the pipeline of the circulating and filtering loop by the metering pump 9 so as to adjust and improve the quality of the cooling water. The metering pump 9 is linked with the circulating pump 3 so as to facilitate the medicament to be quickly and uniformly brought into the water tank 1.
After the maximum flow is manually adjusted, the actual flow of the metering pump 9 is controlled by the PLC controller in a time-proportional manner according to the correlation curve between the water quality monitoring data and the chemical concentration, and the actual flow of the metering pump 9 is corrected by the metering cylinder 8.
And fourthly, automatically controlling the display device, wherein the display device comprises a PLC (programmable logic controller), a 24VDC power supply and a touch display screen.
The PLC is respectively connected with a thermometer T2, a pH meter 6, a conductivity meter CN, a water hardness meter H, a chloride ion analyzer CL, a silicate analyzer SI and a sulfate radical analyzer SO of the water quality monitoring loop and a metering pump 9 of the dosing device, and pre-calibrated correlation curve relation data of water quality index parameters and medicament concentration in cooling water are stored in the PLC. Referring to fig. 2, the PLC controller selects siemens S7-200 series, and is configured with one 2-circuit thermal resistance input module and three 12-circuit analog input modules; the CPU has 6 digital quantity inputs and 4 relay outputs.
The touch display screen is connected with the PLC and is communicated with the PLC, and displays monitoring data and control information of the PLC and realizes man-machine conversation; the touch display screen is provided with a USB interface, and monitoring data can be output to a U disk in a CSV file (excel readable) form so as to be further processed.
The automatic water quality monitoring and dosing system further comprises an electrical part, as shown in figure 3, the electrical part comprises a breaker, a transformer, a power supply, a contactor, a protector, a control relay, a box body and the like, is suitable for 380V and 50Hz power supply forms of factories, adopts a Schneider leakage protection incoming line breaker and other circuit breakers, contactors and thermal protectors, and is provided with a 380V/220V transformer for supplying power to the interior.
The specific principle of the water quality automatic monitoring and dosing system is as follows, and is shown in figure 1:
1) after the equipment is electrified and started, cooling water from the water tank 1 passes through the water inlet filter 2 and is sent into the filter bag filter 4 by the circulating pump 3 for filtering, pressure signals measured in real time by the front pressure gauge P2 and the rear pressure gauge P3 in front of and behind the filter bag filter 4 enter the PLC, when the pressure difference in front of and behind the filter bag filter 4 is too large, the touch display screen prompts an alarm, a maintenance worker replaces the filter bag of the filter bag filter 4, and the bypass valve V3 is opened when the filter bag is replaced, so that the normal circulation of the cooling water of the system is not affected.
2) The thermometer T2 of the water quality monitoring loop detects the temperature of the sampled cooling water in real time and inputs data into the PLC controller, and the PLC controller controls the pre-processor 5 of the sampled water to adjust the temperature and flow of the sampled cooling water in an air cooling mode and the like, so that the pre-processor is suitable for detection.
The pH meter 6, the conductivity meter CN, the water hardness meter H, the chloride ion analyzer CL, the silicate analyzer SI and the sulfate analyzer SO carry out real-time water quality detection on the sampled cooling water sent by the sampled water pre-processor 5, and transmit water quality monitoring data to the PLC controller, and the PLC controller carries out comparison processing on the water quality monitoring data and stored correlation curve relation data of water quality index parameters and medicament concentration in the cooling water. When the concentration of the medicament in the cooling water is monitored to be lower than the correlation curve relation data, the PLC sends an instruction to control the metering pump 9 and the circulating pump 3 to be linked, and the rust-proof maintenance medicament in the medicament tank 7 quickly and uniformly enters the water tank 1 through the medicament feeding port D, so that the automatic medicament feeding function of the system is realized; and when the concentration of the medicament in the cooling water reaches the preset correlation curve relation data, the PLC controls the metering pump 9 to stop working. Therefore, the automatic water quality monitoring and dosing system realizes the online real-time monitoring and automatic dosing maintenance of the water quality of the diesel engine circulating cooling water system.
3) The automatic water quality monitoring and dosing system monitors the quality of cooling water in real time through the PLC and controls automatic dosing, stably controls the water quality index of the diesel engine circulating cooling water in the following range, and alarms when exceeding the range:
pH value: 0-14,
conductivity: 0 to 10000uS/cm,
water hardness: CaCO3，0-1000ppm，
Chloride ion: 1.8-355ppm of a catalyst,
silicate radical: 0 to 5ppm of a nitrogen-containing compound,
sulfate radical: 0-200 ppm.
4) When the automatic water quality monitoring and dosing system operates, the touch display screen displays the following contents and outputs monitoring data through the USB interface:
a. the temperature, pressure and water quality index parameters of the circulating cooling water;
b. the start-stop state of the circulating pump 3;
c. the start-stop state of the metering pump 9;
5) the system records and stores the real-time water quality index values of the cooling water listed in the item 3).
The scope of the invention is not limited to the embodiments described above, but also encompasses other variants and alternatives which are obvious for the invention.
Claims (10)
1. The utility model provides a quality of water automatic monitoring and medicine system of diesel engine recirculated cooling water which characterized in that: quality of water automatic monitoring and medicine system includes:
the circulating filtering loop is used for filtering and purifying circulating cooling water and comprises a water tank, a water inlet filter, a circulating pump and a filter bag filter; the water tank is used for storing cooling water and is provided with a water outlet and a water return port, the water inlet filter, the circulating pump and the filter bag filter are sequentially connected between the water outlet and the water return port through pipelines, a sampling water leading-out port and a medicine adding port are sequentially arranged between the filter bag filter and the water return port, the sampling water leading-out port is positioned behind the filter bag filter and in front of the medicine adding port, the cooling water from the water tank is filtered by the water inlet filter and then is sent into the filter bag filter by the circulating pump for filtering, and the filtered cooling water returns to the water tank;
the water quality monitoring loop is used for detecting the water quality of the cooling water in the circulating and filtering loop in real time and comprises a sampling water pre-processor, a pH meter, a conductivity meter, a water hardness meter, a chloride ion analyzer, a silicate analyzer and a sulfate radical analyzer; the upstream of the sampling water pre-processor is connected with the sampling water outlet, and the downstream of the sampling water pre-processor is respectively connected with the pH meter, the conductivity meter, the water hardness meter, the chloride ion analyzer, the silicate analyzer and the sulfate radical analyzer, and then is uniformly connected with the water tank through a pipeline;
the dosing device is used for adding an antirust maintenance agent to the water tank and comprises an agent tank, a metering cylinder and a metering pump; the agent tank is stored with an antirust maintenance agent for improving water quality, the upstream of the metering pump is connected with the agent tank and the metering cylinder, and the downstream of the metering pump is connected with the agent adding port;
the automatic control display device comprises a PLC controller and a touch display screen; the PLC is respectively connected with a circulating pump of the circulating filtration loop, a water preprocessor of the water quality monitoring loop, a pH meter, a conductivity meter, a water hardness meter, a chloride ion analyzer, a silicate group analyzer, a sulfate group analyzer and a metering pump of the dosing device, the PLC stores pre-calibrated correlation curve relation data of water quality index parameters and medicament concentration in cooling water, the touch display screen is connected with and communicates with the PLC, and the monitoring data and control information of the PLC are displayed and man-machine conversation is realized;
the water quality monitoring loop carries out real-time water quality detection on the sampled cooling water and transmits water quality monitoring data to the PLC, the PLC carries out comparison processing on the water quality monitoring data and stored association curve relation data of water quality index parameters and medicament concentration in the cooling water, and when the medicament concentration in the cooling water is lower than the association curve relation data, the PLC sends an instruction to control the metering pump to inject rust-proof maintenance medicament into the water tank through the medicament feeding port, so that the automatic medicament feeding function is realized; when the concentration of the medicament in the cooling water reaches the preset incidence curve relation data, the PLC controls the metering pump to stop working, so that the on-line real-time monitoring and automatic dosing maintenance of the cooling water quality are realized, and the water quality index of the diesel engine circulating cooling water is stably controlled and kept in a normal range.
2. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: the normal range of the water quality index of the circulating cooling water is as follows:
pH value: 0-14,
conductivity: 0 to 10000uS/cm,
water hardness: CaCO3，0-1000ppm，
Chloride ion: 1.8-355ppm of a catalyst,
silicate radical: 0 to 5ppm of a nitrogen-containing compound,
sulfate radical: 0-200 ppm.
3. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 2, wherein: and when the water quality index of the circulating cooling water exceeds the normal range, the system gives an alarm.
4. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: and a pre-pump thermometer and a pre-pump pressure gauge are arranged on a pipeline behind the water inlet filter and in front of the circulating pump so as to monitor the water temperature and the water pressure of cooling water in the circulating filtering loop, and the pre-pump thermometer and the pre-pump pressure gauge are connected with the controller and transmit monitoring data.
5. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: the front and the back of the filter bag filter are respectively provided with a front pressure gauge and a back pressure gauge so as to monitor the filth blockage condition of the filter bag and facilitate prompting of filter bag replacement, the front pressure gauge and the back pressure gauge are both connected with the controller and used for conveying monitoring data, and when the pressure difference between the front and the back of the filter bag filter is too large, the touch display screen gives an alarm to prompt of filter bag replacement.
6. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: the front and the back of the filter bag filter are respectively provided with a front valve and a back valve, and the filter bag filter is connected with a bypass valve in parallel, so that the filter bag can be conveniently replaced and maintained, and the bypass valve is opened when the filter bag is replaced.
7. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: the sampling water pre-processor comprises a thermometer, the thermometer detects the temperature of the sampled cooling water in real time, monitoring data is input into the controller, and the controller controls the sampling water pre-processor to adjust the temperature and the flow of the sampled cooling water in an air cooling mode so as to enable the sampling water pre-processor to be suitable for detection.
8. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: when the water quality monitoring loop works, the effectiveness of instrument monitoring data is linked with the starting of the circulating pump; when the dosing device works, the metering pump is linked with the circulating pump.
9. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: the touch display screen is provided with a USB interface, and monitoring data are output to the USB flash disk so as to be further processed.
10. The automatic water quality monitoring and dosing system for the diesel engine circulating cooling water as claimed in claim 1, wherein: the actual flow of the metering pump is controlled by the controller according to the correlation curve of the water quality monitoring data and the medicament concentration in a time proportion mode, and the actual flow of the metering pump is corrected by the metering cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911178835.5A CN111003838A (en) | 2019-11-27 | 2019-11-27 | Automatic water quality monitoring and dosing system for diesel engine circulating cooling water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911178835.5A CN111003838A (en) | 2019-11-27 | 2019-11-27 | Automatic water quality monitoring and dosing system for diesel engine circulating cooling water |
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| CN111003838A true CN111003838A (en) | 2020-04-14 |
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| CN201911178835.5A Withdrawn CN111003838A (en) | 2019-11-27 | 2019-11-27 | Automatic water quality monitoring and dosing system for diesel engine circulating cooling water |
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