CN216133352U

CN216133352U - Circulating water automatic control system

Info

Publication number: CN216133352U
Application number: CN202121973886.XU
Authority: CN
Inventors: 王军辉; 张龙军; 金永生
Original assignee: Baiyin Xindafu Technology Chemical Co ltd; Baiyin Nonferrous Group Co Ltd
Current assignee: Baiyin Xindafu Technology Chemical Co ltd; Baiyin Nonferrous Group Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-03-25
Anticipated expiration: 2031-08-20

Abstract

The utility model discloses a circulating water automatic control system, which comprises an upper limit water level switch, an upper water level float switch, a lower water level float switch and a lower limit water level switch which are sequentially arranged in a cooling water pool from top to bottom, a water replenishing valve arranged at a water replenishing port of the cooling water pool and a temperature sensor arranged on a water collecting layer at the bottom of the cooling water pool; the utility model can automatically detect the water level in the cooling water tank, realize automatic water supplement when the water level is insufficient and automatic water cut-off when the water level is overhigh, not only save manpower, but also have high monitoring precision and strong timeliness, effectively ensure the stable and reliable operation of equipment, simultaneously carry out secondary detection and real-time alarm when the water level exceeds a preset range due to the failure or inaccurate detection of the float switch, remind field workers to overhaul in time, provide double detection and guarantee for the utility model, and improve the reliability and stability of the utility model.

Description

Circulating water automatic control system

Technical Field

The utility model belongs to the technical field of cooling towers, and particularly relates to an automatic circulating water control system.

Background

Water is a cooling liquid most commonly used in industry due to its high specific heat capacity and low cost, and is often used for heat exchange, circulation cooling, and the like in industrial production. Circulating water in the heat exchanger is heated after absorbing heat, and is recycled after being cooled, and a ventilation cooling tower is mostly adopted at the present stage, and the circulating water is cooled by utilizing water and air convection. The cooling tower is produced by tower body, cooling water pool and circulation system group, is cooled down to the circulating pipe spraying cooling water of heat exchanger by spraying the module, then the cooling water that the module that sprays rises temperature through the reaction with the heat exchanger and falls down, gets into cooling tower cooling water pool after need cooling once more and carries out cyclic utilization. However, in the production and cooling processes, due to the evaporation loss of water, water needs to be timely supplemented to the cooling water tank, water is often supplemented through manual observation at present, but the manual operation mode not only consumes a large amount of manpower, but also the water supplementing process is easily affected by artificial uncertain factors, and the situation that the operation of the system is affected by overhigh water level overflow or overlow water level is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide an automatic circulating water control system.

The technical scheme adopted by the utility model is as follows:

an automatic control system of circulating water is arranged in a cooling water pool of a cooling tower, the cooling water pool is provided with an overflow port, a water supplementing port and a circulating water outlet port, the water supplementing port and the circulating water outlet port are positioned below the overflow port, the water supplementing port is connected with cooling water treated by external equipment, the circulating water outlet port pumps the cooling water in the cooling water pool into a spraying module at the upper end of the cooling tower through a circulating water pump, the cooling water of the spraying module exchanges heat for a circulating water pipe of a heat exchanger and then converges into a water gathering layer at the bottom of the cooling tower, the automatic control system comprises a central processing module, an upper water level float switch, a lower water level float switch and a water supplementing valve, the upper water level float switch and the lower water level float switch are arranged in the cooling water pool up and down and positioned between the overflow port and the circulating water outlet port, the upper water level float switch is connected with the inner wall of the cooling water pool through a first connecting rod, the lower water level float switch is connected with the inner wall of the cooling water pool through a second connecting rod, the water replenishing valve is arranged at the water replenishing port; the output end of the upper water level float switch and the output end of the lower water level float switch are respectively connected with the water level signal input end of the central processing module, and the water replenishing control end of the central processing module is connected with the controlled end of the water replenishing valve.

The water level control device further comprises an upper limit water level switch, a lower limit water level switch and an audible and visual alarm module, wherein the upper limit water level switch is arranged between the overflow port and the upper water level float switch, and the lower limit water level switch is arranged between the lower water level float switch and the circulating water outlet port; the output end of the upper limit water level switch and the output end of the lower limit water level switch are respectively connected with the alarm signal input end of the central processing module, and the alarm control end of the central processing module is connected with the sound-light alarm module.

Further, the water-cooling tower further comprises a temperature sensor and a fan, the temperature sensor is arranged on the water-collecting layer at the bottom of the cooling tower, the fan is arranged at a ventilation opening at the bottom of the cooling tower, the output end of the temperature sensor is connected with the water temperature signal input end of the central processing module, and the ventilation control end of the central processing module is connected with the controlled end of the fan.

Further, the number of the fans is two, and the two fans are arranged oppositely.

Furthermore, the circulating water pump is a variable speed water pump, and the central processing module circulation acceleration control end is connected with the controlled end of the circulating water pump.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. through setting up water level float switch and lower water level float switch, automatic detection cooling water pond water level and automatic water supply when realizing the water level not enough and the automatic water break when the water level is too high not only use manpower sparingly, and the monitoring precision is high, and ageing strong, the reliable and stable operation of effective guarantee equipment.

2. The upper limit water level switch and the lower limit water level switch are arranged to further monitor the limit water level, secondary detection and real-time alarm are carried out when the water level exceeds a preset range due to the fault or inaccurate detection of the float switch, field workers are reminded of timely overhauling, double detection and guarantee are provided for the utility model, and the reliability and the stability of the utility model are improved.

3. The temperature sensor is arranged on the water gathering layer, so that the cooling effect can be monitored in real time, and the fan is started to accelerate the ventilation effect at the bottom of the cooling tower when the water temperature is too high, so that the cooling effect is ensured, and the reliability of the cooling tower is further improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the internal structure of the cooling water tank in fig. 1.

The labels in the figure are: 1. a spraying module; 2. a circulating water pipe; 3. a fan; 4. a water collecting layer; 5. a water circulating pump; 6. a cooling water pool; 61. an upper water level float switch; 62. a first connecting rod; 63. a lower water level float switch; 64. a second connecting rod; 65. an overflow port; 66. an upper limit water level switch; 67. a water replenishment port; 68. a circulating water outlet port; 69. a lower limit water level switch; 7. a water replenishing valve; 8. a temperature sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.

As shown in fig. 1, the utility model is arranged in a cooling water pool 6 of a cooling tower, the cooling water pool 6 is provided with an overflow port 65, a water supplementing port 67 and a circulating water outlet port 68, the water supplementing port 67 and the circulating water outlet port 68 are both positioned below the overflow port 65, the water supplementing port 67 is connected with cooling water treated by external equipment, the circulating water outlet port 68 pumps the cooling water in the cooling water pool 6 into a spray module 1 at the upper end of the cooling tower through a circulating water pump 5, the circulating water pump 5 preferably adopts a variable speed water pump with variable speed, and the cooling water of the spray module 1 exchanges heat and cools a circulating water pipe 2 of a heat exchanger and then converges into a water collecting layer 4 at the bottom of the cooling tower.

As shown in fig. 1 and 2, the present invention includes a central processing module, an upper water level float switch 61, a lower water level float switch 63, a water replenishing valve 7, an upper water level limit switch 66, a lower water level limit switch 69, an audible and visual alarm module, a temperature sensor 8 and a fan 3.

The upper limit water level switch 66, the upper water level float switch 61, the lower water level float switch 63 and the lower limit water level switch 69 are sequentially arranged in the cooling water tank 6 from top to bottom and are positioned between the overflow port 65 and the circulating water outlet port 68.

The upper water level float switch 61 is connected with the inner wall of the cooling water pool 6 through a first connecting rod 62, the lower water level float switch 63 is connected with the inner wall of the cooling water pool 6 through a second connecting rod 64, and the water replenishing valve 7 is arranged at a water replenishing port 67. Two ends of the first connecting rod 62 and two ends of the second connecting rod 64 are respectively and fixedly connected with the inner wall of the cooling water pool 6, and the upper water level float switch 61 and the lower float switch are respectively arranged at the middle positions of the corresponding connecting rods. The mode of both ends fixed connection has ensured the stability of floater fixed position, and then ensures the accuracy that upper water level float switch 61 and lower water level float switch 63 detected.

The temperature sensor 8 is arranged on the water collecting layer 4 at the bottom of the cooling tower and used for detecting the water outlet temperature of the circulating water pipe 2 after heat exchange and cooling, the fans 3 are arranged at the ventilation openings at the bottom of the cooling tower, the number of the fans 3 is preferably two, and the two fans 3 are arranged oppositely.

The output end of the upper water level float switch 61 and the output end of the lower water level float switch 63 are respectively connected with the water level signal input end of the central processing module, the output end of the upper water level switch 66 and the output end of the lower water level switch 69 are respectively connected with the alarm signal input end of the central processing module, the output end of the temperature sensor 8 is connected with the water temperature signal input end of the central processing module, the water supplementing control end of the central processing module is connected with the controlled end of the water supplementing valve 7, the ventilation control end of the central processing module is connected with the controlled end of the fan 3, the circulation acceleration control end of the central processing module is connected with the controlled end of the circulating water pump 5, and the alarm control end of the central processing module is connected with the acousto-optic alarm module.

The working principle of the utility model is as follows:

the upper water level float switch 61 and the lower water level float switch 63 monitor the water level condition in real time, when the water level is lower than the height of the lower water level float switch 63, the water replenishing valve 7 is opened and water replenishing is started for the cooling water pool 6, and when the water level rises to the upper water level float switch 61, the water replenishing valve 7 is closed and water replenishing is stopped. When the float switch fails or is not opened or closed in time due to other reasons, the upper limit water level switch 66 detects that the water level reaches the highest limit position or the lower limit water level switch 69 detects that the water level reaches the lowest limit position, the sound and light alarm module sends a signal to remind field workers to overhaul in time, and further expansion of the failure is avoided. When temperature sensor 8 detected the 4 temperature overhigh water in water-collecting layer, it was great to prove required heat transfer heat this moment, in order to guarantee the heat transfer effect, opened the fan 3 that is located the cooling tower vent, and the circulation of air is accelerated, and then promotes heat exchange efficiency. Meanwhile, the water outlet speed of the circulating water pump 5 can be adjusted according to the actual temperature range, so that the cooling water quantity of the spraying module 1 is increased, and the cooling effect is further guaranteed.

The utility model saves the labor cost, and the annual cost is saved by 5-10 ten thousand yuan after the original manual operation is automatically modified. Meanwhile, the normal operation of the system is effectively improved under the combined action of the water replenishing system and the alarm system. In addition, the utility model can be upgraded and reformed on the existing equipment without changing the structure, and has the advantages of low construction cost, convenient subsequent replacement and maintenance and good effect.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a circulating water automatic control system, locate the cooling water pond of cooling tower, the cooling water pond is equipped with the overflow mouth, moisturizing port and circulation play water port all are located the overflow mouth below, the moisturizing port inserts the cooling water of having handled through external equipment, the circulation play water port passes through circulating water pump and goes into the cooling water pump in the cooling water pond and spray the module of cooling tower upper end, the cooling water that sprays the module carries out the water layer that gathers into the bottom of the cooling tower after the heat transfer cooling to the circulating pipe of heat exchanger, its characterized in that: the system comprises a central processing module, an upper water level floater switch, a lower water level floater switch and a water replenishing valve, wherein the upper water level floater switch and the lower water level floater switch are arranged in a cooling water tank from top to bottom and are positioned between an overflow port and a circulating water outlet port; the output end of the upper water level float switch and the output end of the lower water level float switch are respectively connected with the water level signal input end of the central processing module, and the water replenishing control end of the central processing module is connected with the controlled end of the water replenishing valve.

2. The automatic control system for circulating water according to claim 1, characterized in that: the upper limit water level switch is arranged between the overflow port and the upper water level float switch, and the lower limit water level switch is positioned between the lower water level float switch and the circulating water outlet port; the output end of the upper limit water level switch and the output end of the lower limit water level switch are respectively connected with the alarm signal input end of the central processing module, and the alarm control end of the central processing module is connected with the sound-light alarm module.

3. The automatic control system for circulating water according to claim 1, characterized in that: the water-cooling tower is characterized by further comprising a temperature sensor and a fan, wherein the temperature sensor is arranged on a water-collecting layer at the bottom of the cooling tower, the fan is arranged at a ventilation opening at the bottom of the cooling tower, the output end of the temperature sensor is connected with the water temperature signal input end of the central processing module, and the ventilation control end of the central processing module is connected with the controlled end of the fan.

4. The automatic control system for circulating water according to claim 3, characterized in that: the number of the fans is two, and the two fans are arranged oppositely.

5. The automatic control system for circulating water according to claim 3, characterized in that: the circulating water pump is a variable speed water pump, and the circulating acceleration control end of the central processing module is connected with the controlled end of the circulating water pump.