CN205300652U - Cooling tower circulating water monitoring system - Google Patents

Abstract

The utility model provides a cooling tower circulating water monitoring system, is including installing data acquisition transmission terminal RTU, communication network, central computer, control module, peripheral hardware, the execute component who is connected in all kinds of sensors at scene, with every sensor. The sensor is responsible cooling tower circulating water, moisturizing, the flow data of drainage and the acquisition terminal of circulating water quality of water data, thereby it externally provides data interchange to have digital communication interface. Data acquisition transmission terminal RTU passes through the data of gathering the communication of network implementation and central computer. The control module control signal conversion that sends the central computer become numeral or relay output signal, carry supply control valve execute component. Real time monitoring is carried out to cooling tower operation conditions, operating parameter to the foundation of this system. Finally can realize water conservation, energy saving and emission reduction consumption reduction, improve cooling facility cycle efficiency, finally make enterprise's benefit and promote the virtuous circle that water processing technique is progressive.

Description

Cooling tower circulating water monitoring system

technical field

The utility model relates to the technical field of cooling water circulation monitoring.

Background technique

Cooling tower replenishment is a kind of water circulation heat exchange cooling equipment widely used in metallurgy, petroleum, chemical industry, electric power, textile and other industrial production departments. At the same time, cooling tower replenishment is also an important water consumption point of industrial enterprises. However, with the rapid development of industry, The use of cooling towers is not only becoming more common, but also increasingly important. The cooling effect and use of cooling towers have become important factors for users' economic benefits and regional environmental protection indicators; in addition, with the increasing shortage of available water resources in my country and the gradual increase in environmental protection requirements, it is imperative to save water in cooling towers .

Utility model content

The purpose of the utility model is to disclose a circulating water monitoring system of a cooling tower. The establishment of the system can monitor the operating conditions and operating parameters (circulating water quality, recycling rate, water supply, sewage discharge, etc.) of the cooling tower in real time. Ultimately, water saving, energy saving, emission reduction and consumption reduction can be realized, and the cycle efficiency of cooling facilities can be improved, which will ultimately benefit the enterprise and promote a virtuous cycle of water treatment technology progress.

The technical scheme provided by the utility model is:

A cooling tower circulating water monitoring system is characterized in that it includes various sensors installed on site, a data acquisition and transmission terminal RTU connected to each sensor, a communication network, a central computer, a control module, peripherals, and executive components. The central computer, the control module and the peripherals are connected through the data bus.

The sensor is a collection terminal responsible for the flow data of cooling tower circulating water, replenishment and drainage, and circulating water quality data, and has a digital communication interface to provide external data exchange.

The sensor includes a circulating water flow measuring instrument, a replenishing water flow measuring instrument, a drainage flow measuring instrument, and several water quality monitoring instruments. The circulating water flow measuring instrument is installed at the upper or lower end of the circulating water pipe. On the main water pipe, the drainage flow measuring instrument is horizontally installed on the drainage water pipe, and the water quality monitoring instrument is a conductivity tester, which is distributed in a plurality of pipelines in the field.

The data collection and transmission terminal RTU communicates the collected data with the central computer through the GPRS network.

The central computer is provided with a GPRS communication module.

The control module converts the control signal sent by the central computer into a digital or relay output signal, which is provided to the control valve actuator.

The central computer outputs data to peripheral devices (for monitors, printers, etc.).

The establishment of this system monitors the operating status and operating parameters (circulating water quality, recycling rate, water replenishment, sewage discharge, etc.) of the cooling tower in real time. Ultimately, water saving, energy saving, emission reduction and consumption reduction can be realized, and the cycle efficiency of cooling facilities can be improved, which will ultimately benefit the enterprise and promote a virtuous cycle of water treatment technology progress.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

As shown in Figure 1: a cooling tower circulating water monitoring system is characterized in that it includes various sensors installed on site, a data acquisition and transmission terminal RTU connected to each sensor, a communication network, a central computer, a control module, an external The design and executive components, the central computer, the control module and the peripherals are connected through the bus.

Circulating water flow meter, water replenishment flow meter, drainage flow meter, in the selection of flowmeter, you can choose electromagnetic flowmeter, ultrasonic flowmeter, plug-in flowmeter, or communication water meter, etc.

The ultrasonic flowmeter is specifically an ultrasonic liquid flowmeter, which adopts the time difference method and uses a pair of sensors to transmit and receive encoded ultrasonic signals through the liquid in the pipeline. When the liquid is flowing, the signal propagation time in the downstream direction is shorter than that in the upstream direction, and the time difference is proportional to the flow velocity. Specifically, there are two types of ultrasonic flow sensors, wet or clip-on sensors. The clamp-on sensor is clamped on the outer wall of the pipeline and does not come into contact with the liquid to be measured. Wet sensors are installed in pipelines or measuring tubes and are in contact with the liquid to be measured.

Data acquisition and transmission terminal RTU (RTU English full name RemoteTerminalUnit, Chinese full name remote terminal control system). The data acquisition and transmission terminal RTU communicates the collected data with the central computer of the upper computer system through the GPRS network.

The characteristics of the RUT device are:

1. The communication distance is long.

2. Used in various harsh industrial sites.

3. Modular structure design, easy to expand.

RTU is a remote measurement and control unit device, which is responsible for monitoring and controlling field signals and industrial equipment. Compared with the commonly used programmable controller PLC, RTU usually has excellent communication capabilities and larger storage capacity, and is suitable for harsher temperature and humidity environments. Remote Terminal Unit (RTU) Electromagnetic equipment installed at a remote site. The RTU converts the measured status or signal into a data format that can be sent on the communication medium. It also converts the data sent from the central computer into commands to realize the functional control of the sensor.

The RTU equipment adopted in this embodiment is JMRTU-LL-05 in model. It is mainly responsible for the collection of sensor data on site and the execution of commands from the central computer control center.

In this embodiment, a mature GPRS network is used as a network carrier for wireless data transmission.

The central computer performs data transmission and exchange with the sensor terminals on site through the GPRS wireless network. The GPRS communication module (DTU) in the central computer, the DTU equipment in the present embodiment, the terminal model is LZ713I. LZ713IGPRSDTU (DataTransmitUnit, data transmission unit) embedded TCP/IP protocol stack, based on GPRS network, can easily realize remote wireless transparent data transmission, and also supports data collection function, with a wide coverage (where mobile phones can be used Can be used), convenient and flexible networking, low operation and maintenance costs and many other advantages. The GPRS communication module undertakes the functions of data receiving, analysis and command sending, and receives the data uploaded by RTU in real time.

The control module converts the control signal sent by the central computer into a digital or relay output signal, which is provided to the control valve actuator.

The central computer outputs data to peripherals such as monitors and printers.

At present, the circulating water utilization efficiency of cooling facilities is basically around 95.0% to 97.0%. Taking a cooling system with a circulating water volume of 1000m ³ /h as an example, when the circulation rate is 95.0%, the water replenishment volume from June to September in summer reaches 14.4 10,000 cubic meters, the annual water supply is as high as 438,000 cubic meters; if the circulation rate of cooling facilities is increased to 98.0%, the water supply from June to September in summer will reach 58,000 cubic meters, and the annual water supply will be 175,000 cubic meters , it can be seen that the water saving benefit will be significant.

The utility model is beneficial to the improvement of the water efficiency of the cooling tower and the reduction of the operating cost of the cooling tower of the enterprise. Reflecting the requirements of a water-saving society, it has positive significance for effectively improving the circulation efficiency of cooling facilities and at the same time for the utilization efficiency of circulating water for cooling facilities in the whole society.

Claims (3)

1. a cooling-tower circulating water monitoring system, it is characterized in that, the data acquisition transmission terminal RTU that is connected with each sensor including the various kinds of sensors being installed on scene, communication network, central computer, control module, peripheral hardware, executive component, described central computer, control module, peripheral hardware three are connected by data/address bus;

Described sensor is the acquisition terminal being responsible for cooling-tower circulating water, moisturizing, the data on flows of draining and circulating water quality data, with digital communication interface thus externally providing data exchange,

Described sensor includes circulating water flow measuring instrument, refill flow measuring instrument, drain discharge metering instrument, several water quality monitoring instruments, described circulating water flow measuring instrument is arranged on upper end or the lower end of circulating water pipe, described refill flow measuring instrument is arranged on water-main, described drain discharge metering instrument is horizontally installed on draining water pipe, described water quality monitoring instrument is conductivity measurement, is distributed in the multiple pipelines in scene;

The data gathered are realized the communication with central computer by GPRS network by data acquisition transmission terminal RTU;

Central computer is provided with GPRS communication module;

The control signal that central computer is sent by described control module converts numeral or relay output signal to, it is provided that gives and controls valve executive component.

2. cooling-tower circulating water monitoring system as claimed in claim 1, it is characterised in that described RTU equipment, model is JMRTU-LL-05.

3. cooling-tower circulating water monitoring system as claimed in claim 1, it is characterised in that described communication network adopts GPRS network, as the network carrier of wireless data transmission.