Automatic control device for reducing turbidity of water in public engineering at 5 DEG C
By using automatic monitoring and backwashing technology, the problem of water quality exceeding the standard in the 5℃ water system was solved, achieving stable water quality and long-term operation of the equipment, and reducing maintenance frequency and production costs.
Patent Information
- Application Number
- CN202422652992.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In chlor-alkali chemical production, water quality exceeding the standard in the 5℃ water system leads to scaling on the tube walls of heat exchange equipment, microbial growth, and an increase in metal ions, resulting in equipment corrosion and performance degradation, affecting continuous system operation, and increasing production costs.
An automatic control device was designed, including a chiller unit outlet water main pipe, a filter, an online turbidity monitoring and analysis instrument, a remote differential pressure transmitter, and an automatic control system. Through automatic monitoring and filter backwashing, the device maintains stable water quality, extends filter cartridge life, and reduces maintenance frequency.
It achieves automated control of the 5℃ water system, reduces water turbidity, extends filter life, reduces maintenance frequency, lowers production costs, and improves the continuity and efficiency of equipment operation.
Smart Images
Figure CN223842351U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chlor-alkali chemical production technology, specifically an automatic control device for reducing the turbidity of water in public works at 5°C. Background Technology
[0002] In chlor-alkali chemical production processes, due to process requirements, a large number of heat exchange devices are needed to cool the main and auxiliary materials to achieve heat exchange and meet process requirements. Commonly used water cooling media include 5°C water, -35°C brine, and circulating water.
[0003] 5℃ water is a common cooling medium. If the key control indicators of the 5℃ water system exceed the standards, scale will easily form on the walls of the water supply pipes, causing blockage of the heat exchanger tubes, accelerated microbial growth, increased metal ions in the water, and enhanced electrochemical reactions, further corroding the equipment and pipes and causing hidden damage to the equipment. At this point, the equipment will not reach its performance level, requiring frequent maintenance, affecting continuous system operation, reducing equipment uptime, and increasing labor intensity and production costs. Utility Model Content
[0004] To address the aforementioned problems, this utility model provides an automatic control device for reducing the turbidity of 5°C water in public works projects. It features a high degree of automation and strong continuous operation, and is used to solve problems such as water quality exceeding standards in 5°C water systems leading to insufficient heat exchange equipment performance, excessive production costs of microbial agents in the water, increased metal ions in the water causing enhanced electrochemical reactions, corrosion of equipment and pipelines, and hidden damage to equipment.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] An automatic control device for reducing the turbidity of 5°C water in public works is characterized by comprising: a main outlet pipe of a chiller unit, a 5°C water inlet pipe of a filter, a drain valve, a local pressure gauge, an air vent valve, a filter, a 5°C water outlet pipe of the filter, and a flushing water pipe. The filter is provided with a local pressure gauge and an air vent valve arranged side by side on its top. The inlet end of the 5°C water inlet pipe of the filter is connected to the main outlet pipe of the chiller unit, and the outlet end of the 5°C water inlet pipe of the filter is connected to the upper part of the filter. The other end of the upper part of the filter is connected to the flushing water pipe. A drain valve is provided at one end of the bottom of the filter, and a 5°C water outlet pipe of the filter is provided at the other end of the bottom of the filter. The 5°C water outlet pipe of the filter is connected to the main outlet pipe of the chiller unit.
[0007] A first manual valve, a first automatic regulating valve, and a second manual valve are sequentially installed on the 5℃ water inlet pipe of the filter. A third manual valve, a second automatic regulating valve, and a fourth manual valve are sequentially installed on the 5℃ water outlet pipe of the filter. A fifth manual valve, a third automatic regulating valve, and a sixth manual valve are sequentially installed on the flushing water pipe. A first remote differential pressure transmitter and a second remote differential pressure transmitter are respectively installed downstream of the second manual valve on the 5℃ water inlet pipe of the filter and downstream of the third manual valve on the 5℃ water outlet pipe of the filter.
[0008] The refrigeration unit's main water outlet is equipped with an online turbidity monitoring and analysis instrument, and the flushing water outlet is equipped with a remote flow meter.
[0009] The beneficial effects of this utility model are:
[0010] (1) When the utility model is used, the online turbidity comprehensive monitoring and analysis instrument can monitor the turbidity of the 5℃ water quality of the public works and detect the pH value. When the turbidity exceeds the control index, the 5℃ water with turbidity exceeding the control index can be filtered by the automatic control system. At the same time, when the filter effect decreases, the filter can be cleaned by the flushing water pipe to achieve the purpose of long-term operation of the filter.
[0011] (2) When the differential pressure display of the first remote differential pressure transmitter and the second remote differential pressure transmitter is greater than 0.1 MPa, the program controls the closing of the first automatic control valve and the second automatic control valve, cuts off the 5°C water entering the filter, opens the drain valve at the bottom of the filter, and slowly opens the third automatic control valve to backwash the filter. After observing that the backwash wastewater is clean, the drain valve and the third automatic control valve are closed. This can avoid frequent replacement of the filter element, effectively extend the service life of the filter element, reduce the frequency of maintenance, and effectively control production costs. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model.
[0013] Attached reference numerals: 1. Main outlet water pipe of refrigeration unit; 2. 5℃ water pipe inlet to filter; 3. First manual valve; 4. First automatic control regulating valve; 5. Second manual valve; 6. First remote differential pressure transmitter; 7. Drain valve; 8. Local pressure gauge; 9. Air vent valve; 10. Remote flow meter; 11. Filter; 12. 5℃ water pipe outlet from filter; 13. Second remote differential pressure transmitter; 14. Third manual valve; 15. Second automatic control regulating valve; 16. Fourth manual valve; 17. Fifth manual valve; 18. Third automatic control regulating valve; 19. Sixth manual valve; 20. Flushing water pipe; 21. Online turbidity comprehensive monitoring and analysis instrument; 22. Drain outlet; 23. Side outlet; 24. Pipeline; 25. First inlet; 26. Second inlet. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] like Figure 1 As shown, an automatic control device for reducing the turbidity of 5°C water in public works is characterized by comprising: a chiller unit outlet main pipe 1, a 5°C water inlet pipe 2 for the filter, a drain valve 7, a local pressure gauge 8, an air vent valve 9, a filter 11, a 5°C water outlet pipe 12 for the filter, and a flushing water pipe 20. The filter 11 is provided with a local pressure gauge 8 and an air vent valve 9 arranged side by side on its top. The inlet end of the 5°C water inlet pipe 2 is connected to the chiller unit outlet main pipe 1, and the outlet end of the 5°C water inlet pipe 2 is connected to a first inlet 25 on one side of the top of the filter 11. The second inlet 26 on the other side of the top of the filter 11 is connected to the flushing water pipe 20. A drain valve 7 is provided on the drain outlet 22 at the bottom of the filter 11. The other end of the bottom of the filter 11 is provided with a 5°C water outlet pipe 12, which is connected to the chiller unit outlet main pipe 1.
[0016] like Figure 1 As shown, a first hand valve 3, a first self-regulating valve 4, and a second hand valve 5 are sequentially installed on the 5℃ water inlet pipe 2 of the filter. A third hand valve 14, a second self-regulating valve 15, and a fourth hand valve 16 are sequentially installed on the 5℃ water outlet pipe 12 of the filter. A fifth hand valve 17, a third self-regulating valve 18, and a sixth hand valve 19 are sequentially installed on the flushing water pipe 20. A first remote differential pressure transmitter 6 is installed on the pipe 24 between the second hand valve 5 and the first inlet 25. A second remote differential pressure transmitter 13 is installed on the pipe between the third hand valve 14 and the bottom outlet 23 of the filter 11.
[0017] like Figure 1 As shown, the outlet end of the main water outlet pipe 1 of the refrigeration unit is equipped with an online turbidity comprehensive monitoring and analysis instrument 21, and the outlet end of the flushing water pipe 20 is equipped with a remote flow meter 10.
[0018] This invention uses a degreased cotton filter element instead of the commonly used filter screen, which can better filter suspended solids, colloids, solid particles, sludge and other impurities in the water, achieving water quality that meets the process control requirements in the shortest time. Secondly, all equipment and pipelines in the device undergo pressure testing according to relevant standards, and are purged, pressure tested for leaks, and cleaned before operation. The filter 11, after installing the degreased cotton filter element, is soaked in water before use. The accuracy of the instruments is adjusted, and the PLC controller and central control computer are adjusted using analog value signals, ensuring that interlocking settings meet logical requirements.
[0019] A local pressure gauge 8 and an exhaust valve 9 are arranged side by side on the top of the filter 11. The inlet end of the 5℃ water pipe 2 is connected to the main outlet pipe 1 of the refrigeration unit. The outlet end of the 5℃ water pipe 2 is connected to the first inlet 25 on one side of the top of the filter 11. The second inlet 26 on the other side of the top of the filter 11 is connected to the flushing water pipe 20. A drain valve 7 is provided on the drain outlet 22 at the bottom of the filter 11. The other end of the bottom of the filter 11 is provided with a 5℃ water pipe 12, which is connected to the main outlet pipe 1 of the refrigeration unit. A first hand valve 3, a first self-regulating valve 4, and a second hand valve 5 are sequentially installed on the 5℃ water inlet pipe 2 of the filter. A third hand valve 14, a second self-regulating valve 15, and a fourth hand valve 16 are sequentially installed on the 5℃ water outlet pipe 12 of the filter. A fifth hand valve 17, a third self-regulating valve 18, and a sixth hand valve 19 are sequentially installed on the flushing water pipe 20. A first remote differential pressure transmitter 6 is installed on the pipe 24 between the second hand valve 5 and the first inlet 25. A second remote differential pressure transmitter 13 is installed on the pipe between the third hand valve 14 and the bottom outlet 23 of the filter 11. During operation, open the first hand valve 3, the second hand valve 5, the third hand valve 14, the fourth hand valve 16, the fifth hand valve 17, and the sixth hand valve 19 in sequence. Slowly open the first automatic control valve 4 to inject water into the filter 11. When water is discharged from the vent valve 9 of the filter 11, close the vent valve 9 and simultaneously close the first automatic control valve 4. This is to prevent the filter element from deforming and being damaged by a large influx of water. During the operation of the 5℃ water system, when the online turbidity comprehensive monitoring and analysis instrument 21 displays a value greater than 20 NUT, the first automatic control valve 4 and the second automatic control valve 15 slowly open simultaneously, allowing a portion of the 5℃ water to enter the filter. This filters out suspended solids, organic matter, and other impurities in the water. Through continuous filtration and circulation, the turbidity of the 5℃ water can be reduced. When the differential pressure display of the first remote differential pressure transmitter 6 and the second remote differential pressure transmitter 13 is greater than 0.1 MPa, the program controls the closure of the first automatic control valve 4 and the second automatic control valve 15, cutting off the 5°C water entering the filter 11, opening the drain valve 7 at the bottom of the filter 11, and slowly opening the third automatic control valve 18 to backwash the filter 11. After observing that the backwash wastewater is clean, the drain valve 7 and the third automatic control valve 18 are closed. This avoids frequent replacement of the filter element, effectively extending the service life of the filter element, while reducing the frequency of maintenance and effectively controlling production costs. Furthermore, the 5°C water inlet and outlet and backwash water in the filter are automatically interlocked for precise operation and monitoring, reducing the labor intensity of personnel.
[0020] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An automatic control device for reducing the turbidity of water in public works at 5°C, characterized in that: The system includes a chiller unit outlet main pipe (1), a 5℃ water inlet pipe (2), a drain valve (7), a field pressure gauge (8), an air vent valve (9), a filter (11), a 5℃ water outlet pipe (12), and a flushing water pipe (20). The filter (11) is equipped with a field pressure gauge (8) and an air vent valve (9) arranged side-by-side on its top. The inlet end of the 5℃ water inlet pipe (2) is connected to the chiller unit outlet main pipe (1), and the outlet end of the 5℃ water inlet pipe (2) is connected to the first inlet (25) on one side of the top of the filter (11). The second inlet (26) on the other side of the top of the filter (11) is connected to the flushing water pipe (20). A drain valve (7) is installed on the drain outlet (22) on one side of the bottom of the filter (11), and a 5℃ water outlet pipe (12) is installed on the drain outlet (23) on the other side of the bottom of the filter (11). The 5℃ water outlet pipe (12) is connected to the chiller unit outlet main pipe (1). The outlet end of the main water outlet pipe (1) of the refrigeration unit is equipped with an online turbidity comprehensive monitoring and analysis instrument (21), and the outlet end of the flushing water pipe (20) is equipped with a remote flow meter (10).
2. The automatic control device for reducing the turbidity of water in public works at 5°C according to claim 1, characterized in that: The inlet filter 5℃ water pipe (2) is sequentially equipped with a first hand valve (3), a first self-regulating valve (4), and a second hand valve (5). The outlet filter 5℃ water pipe (12) is sequentially equipped with a third hand valve (14), a second self-regulating valve (15), and a fourth hand valve (16). The flushing water pipe (20) is sequentially equipped with a fifth hand valve (17), a third self-regulating valve (18), and a sixth hand valve (19). The pipe (24) between the second hand valve (5) and the first inlet (25) is equipped with a first remote differential pressure transmitter (6). The pipe (23) between the third hand valve (14) and the bottom outlet (23) of the filter (11) is equipped with a second remote differential pressure transmitter (13).