Device for automatically adjusting temperature of circulating water

Abstract

The utility model provides a device capable of automatically adjusting the temperature of circulating water, which is characterized in that a circulating water tank is connected with a production workshop heat exchanger through a circulating water pump, a water return pipe of the production workshop heat exchanger is connected with the circulating water tank through an adjustable electric valve controller I and an adjustable electric valve controller II respectively, and a cooling tower is arranged above the circulating water tank; the cooling tower is provided with a frequency conversion fan. And a temperature monitoring system and a steam conveying system are arranged on the circulating water tank. And the upper part of the circulating water tank is an adjustable shutter baffle window. The circulating water temperature can be automatically adjusted according to the outdoor air temperature, the heat exchange effect and the equipment operation stability are ensured, and the production efficiency and the product quality are improved. A frequency conversion fan and an upper tower adjustable electric valve are adopted, constant-temperature control over circulating water is achieved, energy consumption is effectively reduced, and the energy utilization rate is increased. An on-line monitoring system and a dosing system are arranged, the state of circulating water is monitored in real time, stable water quality is ensured, and the service life of equipment is prolonged. The control system adopts intelligent design, and the automation degree is high.

Description

Technical Field

[0001] The utility model relates to the field of circulating water, in particular to a device and a system capable of automatically adjusting the temperature of circulating water. Background Art

[0002] With the rapid development of modern industry, circulating water is increasingly used in various factories and enterprises. At present, the traditional circulating water control method is that the circulating water is pumped to the heat exchanger in the production workshop, absorbs the heat in the heat exchanger, and then cools down in the circulating cooling tower and returns to the circulating water pool for recycling.

[0003] However, the outdoor temperature difference between summer and winter in the north is large, and the traditional circulating water control method has certain shortcomings. First, in winter, the circulating water temperature is too low, which may lead to poor heat exchange effect and affect production efficiency. Second, in summer, the circulating water temperature is too high, which may cause unstable equipment operation and even affect product quality. In addition, the traditional circulating water control method has a low energy utilization rate, which is not conducive to energy conservation and emission reduction. Summary of the invention

[0004] In view of the above technical problems and to solve the problems of unstable circulating water temperature and low energy utilization rate, the utility model provides a device which can automatically adjust the circulating water temperature. In the device, a circulating water pool is connected to a heat exchanger in a production workshop via a circulating water pump, and the return pipe of the heat exchanger in the production workshop is connected to the circulating water pool via adjustable electric valve control one and adjustable electric valve control two respectively. A cooling tower is arranged above the circulating water pool, and the cooling tower is equipped with a variable frequency fan.

[0005] The circulating water pool is equipped with a temperature monitoring system and a steam delivery system.

[0006] The upper part of the circulating water pool is equipped with an adjustable louvered baffle window.

[0007] The temperature monitoring system interlocks the steam delivery system, adjustable louver windows, and cooling tower variable frequency fan opening to achieve automatic constant temperature control of circulating water.

[0008] The circulating water pool is also equipped with an online water quality monitoring system and a dosing system; the online monitoring system is used to monitor the parameters of the circulating water in real time and transmit the monitoring data to the controller; the dosing system is used to add chemicals to the circulating water.

[0009] The circulating water pool can be designed in size according to the demand for production circulating water, and can be equipped with multiple sets of circulating water pumps, cooling towers and other equipment.

[0010] The circulating water pool is equipped with an online water quality monitoring system and a dosing system. The online monitoring system is used to monitor various parameters of the circulating water in real time and transmit the monitoring data to the controller so that the controller can monitor and analyze the circulating water status in real time. The dosing system is used to add an appropriate amount of medicine to the circulating water to maintain the water quality stable and prevent the growth of scale and microorganisms.

[0011] The circulating water pool is provided with a temperature monitoring system, and the circulating water temperature is interlocked with the adjustable electric valve, cooling tower fan, steam delivery system, and adjustable louver baffle window according to the production device requirements, and adjusted according to the program.

[0012] As the preferred solution, the adjustable electric valve automatic control is: in winter, when the temperature of the circulating water pool is lower than the lower limit of the temperature control (settable), the upper tower electric regulating valve is closed to 50% at a rate of 1%, and wait for 2 hours. If the temperature does not rise, the valve opening is closed to 10% at a rate of 1%; according to the seasonal changes in the north, from April to October (settable), the return pool valve is interlocked and closed; from November to March of the following year (settable), the return pool valve is interlocked and opened with an opening of 8%; an interlocking on-off switch is set.

[0013] The automatic control scheme of the variable frequency fan of the cooling tower as the preferred scheme is: if there is one fan running, judge the operating frequency of the fan, the circulating water temperature in summer is higher than the high temperature control limit, and the operating fan frequency is greater than 45Hz, start the standby fan, and the frequency climbs to 35Hz at 0.2Hz / s (adjustable); if two fans are running at the same time, the temperature of the circulating water pool is lower than the middle temperature control limit, and the frequency of the fan controlled first is less than or equal to 12Hz (adjustable), cut out the first control first, and reduce the frequency to 0 at a rate of 0.2Hz / s, and then stop this fan.

[0014] As a preferred solution, when the outside temperature gradually increases and the circulating water temperature tends to rise, the adjustable louvered baffle windows are fully opened first, and when the outside temperature gradually decreases, the louvered baffle windows are gradually closed.

[0015] As the preferred solution, the steam delivery system is mainly used when the temperature in the north is too low in winter, the production system exchanges heat, and the circulating water temperature is too low. After closing the adjustable shutters, the cooling tower variable frequency fan, and the adjustable electric valve (upper tower), the water temperature still cannot reach the set requirements. High-temperature steam is added to the circulating water to increase the heat source input to maintain the set water temperature.

[0016] Beneficial effects of the utility model:

[0017] It can automatically adjust the circulating water temperature according to the outdoor temperature to ensure the heat exchange effect and equipment operation stability, improve production efficiency and product quality. It adopts variable frequency fan and upper tower adjustable electric valve to achieve constant temperature control of circulating water, effectively reduce energy consumption and improve energy utilization. It is equipped with an online monitoring system and a dosing system to monitor the circulating water status in real time, ensure stable water quality and extend the service life of the equipment. The control system adopts intelligent design, high degree of automation, simple operation and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a circulating water automatic temperature control device.

[0019] In the figure: circulating water pool 1, temperature monitoring system 2, water quality online monitoring system 3, dosing system 4, steam delivery system 5, adjustable louver baffle window 6, circulating water pump 7, production workshop heat exchanger 8, adjustable electric valve control one 9, adjustable electric valve control two 9', cooling tower 10, variable frequency fan 11. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] A device and system capable of automatically adjusting the temperature of circulating water, the device mainly comprises a circulating water pool 1, the circulating water pool is equipped with a temperature monitoring system 2, an online water quality monitoring system 3, a dosing system 4, a steam delivery system 5, and an adjustable shutter baffle window 6 is provided on the upper part of the circulating water pool 1. The circulating water pool 1 is connected to a circulating water pump 7, the circulating water pump 7 is connected to a production workshop heat exchanger 8, and the return water pipe of the production workshop heat exchanger 8 is connected to the circulating water pool 1 through an adjustable electric valve control 1 9 and an adjustable electric valve control 2 9', respectively. A cooling tower 10 is provided above the circulating water pool, and the cooling tower is equipped with a variable frequency fan 11. The steam delivery system 5, the adjustable shutter baffle window 6, and the opening of the cooling tower variable frequency fan 11 are interlockedly controlled by the temperature monitoring system 2 to realize automatic constant temperature control of the circulating water.

[0023] Example 2

[0024] The working principle of a device that can automatically adjust the temperature of circulating water is as follows:

[0025] During operation, check that the liquid level in the circulating water pool 1 is within the normal range, start the circulating water pump 7 to deliver water to the production device heat exchanger 8, and after passing through the production workshop heat exchanger 8, the circulating water absorbs heat and is cooled by the circulating cooling tower 10, and then flows back to the circulating water pool 1. In this process, the temperature sensor 2 monitors the temperature of the circulating water pool 1 in real time and transmits the data to the control system.

[0026] Secondly, according to the ambient temperature, the system parameters are determined and divided into two options for summer and winter for control. In summer, the louvered windows are fully open, and in winter, the louvered windows are fully closed. The temperature sensor 2 detects the water temperature. When the circulating water temperature is too high or too low, the controller system controls the frequency of the cooling tower variable frequency fan 11 and the opening of the adjustable electric valve control 1 9 and the adjustable electric valve control 2 9' according to the set temperature threshold to achieve the temperature control of the circulating water.

[0027] In summer, the temperature sensor 2 detects that the temperature of the circulating water pool 1 is higher than the set temperature high control limit, and one cooling tower variable frequency fan 11 is running, the frequency of the cooling tower variable frequency fan 11 is greater than 45Hz, and its frequency is ramped to 35Hz at a rate of 0.2Hz / s. The temperature sensor 2 detects that the temperature of the circulating water pool 1 is lower than the set temperature medium control limit, and two cooling tower variable frequency fans 11 are running at the same time, and the frequency of the first-controlled cooling tower variable frequency fan 11 is lower than or equal to 12Hz. The control system will first cut out the first-controlled cooling tower variable frequency fan 11, and reduce its frequency to 0 at a rate of 0.2Hz / s, and then stop the fan.

[0028] In winter, when the temperature sensor 2 detects that the temperature of the circulating water pool 1 is lower than the set temperature control lower limit, the adjustable electric valve control 9 will gradually close to 50% at a rate of 1%, and after waiting for 2 hours, if the temperature still does not rise, it will continue to gradually close to 10% at a rate of 1%. When the seasons change in the north, from April to October, the interlock closes the adjustable electric valve control 9'; from November to March of the following year, the interlock opens the adjustable electric valve control 9', and the opening is 8%.

[0029] At the same time, the online monitoring system 3 continuously monitors various parameters of the circulating water, and the dosing system 4 performs trial dosing according to the monitored parameters to ensure stable water quality.

[0030] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A device for automatically adjusting the temperature of circulating water, characterized in that: The circulating water pool (1) is connected to the production workshop heat exchanger (8) via a circulating water pump (7); the return pipe of the production workshop heat exchanger (8) is connected to the circulating water pool (1) via an adjustable electric valve control 1 (9) and an adjustable electric valve control 2 (9′), respectively; a cooling tower (10) is provided above the circulating water pool (1); and the cooling tower (10) is equipped with a variable frequency fan (11).

2. The device for automatically adjusting the temperature of circulating water according to claim 1, characterized in that: The circulating water pool (1) is provided with a temperature monitoring system (2) and a steam delivery system (5).

3. The device for automatically adjusting the temperature of circulating water according to claim 2, characterized in that: The upper part of the circulating water pool (1) is an adjustable louvered baffle window (6).

4. The device for automatically adjusting the temperature of circulating water according to claim 3, characterized in that: The temperature monitoring system (2) interlocks and controls the steam delivery system (5), the adjustable shutter baffle window (6), and the opening of the cooling tower variable frequency fan (11), thereby realizing automatic constant temperature control of circulating water.

5. The device for automatically adjusting the temperature of circulating water according to claim 1, characterized in that: The circulating water pool (1) is also provided with a water quality online monitoring system (3) and a dosing system (4); the online monitoring system (3) is used to monitor the parameters of the circulating water in real time and transmit the monitoring data to the controller; the dosing system (4) is used to add drugs to the circulating water.

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