CN203421772U - Intelligent heat exchange station - Google Patents

The utility model discloses an intelligent heat exchange station comprising a monitor center, a control unit and a heat supply network second-level heat exchange station. A plurality of adjusting monitor devices are arranged in a connection pipeline of the heat supply network second-level heat exchange station and are respectively connected with the control unit. The control unit collects and processes data of the adjusting monitor devices in the heat supply network second-level heat exchange station, sends the data to the monitor center in a wireless or wired mode, and carries out monitoring independently or together with the monitor center. According to the intelligent heat exchange station, a large number of physical quantities are monitored and collected through the control unit and the monitor center, the parameters are collected and processed in real time through a PLC, operation conditions and operation quality of a heat supply system can be mastered in a macroscopic mode, and operation parameters of the heat supply system are ensured; water power working conditions and heat power working conditions of a heat supply network are adjusted in a full-automatic mode, coupling influence of heat exchange stations is overcome, disordered water supplying of the heat supply network is eliminated, and a heat supply effect is balanced.

Intelligent heat exchange station

Technical field

The utility model relates to a kind of intelligent heat exchange station, belongs to energy technology field.

Background technology

Central heating is saved the energy and improves the positive role of the aspects such as urban environment because having, and day by day becomes an important component part of urban public utilities.Chief component as central heating system---first heat exchange station is the important critical point of thermal source output.

Central heating have save the energy, improve urban environment, many-sided effect such as increase economic efficiency.And heat exchange station plays considerable effect in the middle of this forms.Development along with China's economic construction, central heating becomes the important part of China's urban service, along with the expansion in China city concentrates secondary heat supply also in constantly growth, and how to improve economic benefit and the social benefit of the production run of secondary heat supply network heat exchange station, with regard to a major issue in the middle of the heat supply network heat supply of Cheng Liao China.

The scale of heat exchange station is large, secondary network radiation radius is strengthened, pipeline is relatively long, cause the loss of secondary network pipe network large, hydraulic misadjustment is also all the more serious: if heat exchange station position is supplying certain corner of thermal region, the adjusting difficulty of secondary network is just larger, is unfavorable for the thermodynamic equilibrium of waterpower, affects heating effect.And power consumption and the water consumption of large-scale heat exchange station are higher, move uneconomical.

Utility model content

Object: in order to overcome the deficiencies in the prior art, the utility model provides a kind of intelligent heat exchange station.

Technical scheme: for solving the problems of the technologies described above, the technical solution adopted in the utility model is:

A kind of intelligent heat exchange station, comprise: Surveillance center, control module, heat supply network secondary heat exchange station, it is characterized in that: in the connecting line at described heat supply network secondary heat exchange station, be provided with a plurality of adjusting monitoring devices, described adjusting monitoring device is all connected with control module, described control module gathers in heat supply network secondary heat exchange station and regulates the data of monitoring device and process, with wireless or wired ，Bing Yu Surveillance center of Surveillance center that sends data to, work in coordination with monitoring or independent monitoring.

Described intelligent heat exchange station, is characterized in that: described adjusting monitoring device comprises electric control valve, motor-driven valve, circulating pump, small pump, Pressure gauge, thermometer, flowmeter.

Described intelligent heat exchange station, is characterized in that: described Surveillance center, for monitoring real-time parameter, real-time parameter comprises pressure, temperature, water level, flow, heat, voltage, the electric current in the connecting line at heat supply network secondary heat exchange station.

Described intelligent heat exchange station, it is characterized in that: described control module is PLC controller, for controlling the electrical adjustable device of water intaking valve, outlet valve, circulating pump, small pump work, with monitor temperature, pressure, flow, circulating pump state, small pump state, control valve opening, carry out small pump variable frequency adjustment and circulating pump variable frequency adjustment simultaneously, and be connected with data display unit, data processing unit, network communication unit, alarm indication unit, input operation unit.

Described intelligent heat exchange station, is characterized in that: described heat supply network secondary heat exchange station comprises community heat exchange station and concentrated heat exchange station.

Described intelligent heat exchange station, is characterized in that: described community heat exchange station comprises community feed pipe, community return pipe, running water pipe, community heat exchanger, water storage box; The pipeline of described community feed pipe, community return pipe, running water pipe and water storage box is interconnected to form community heat exchange secondary net; Water storage box is equiped with thermometer and Pressure gauge, and described water storage box connects community feed pipe and community return pipe, and water storage box is for being responsible for storage hot water and exporting community; Described community return pipe connects water storage box and running water pipe, on the return pipe of described community, electric control valve and motor-driven valve is housed; Described community feed pipe connects water storage box ，You community return pipe by community heat exchanger and running water pipe supplies water, and on the feed pipe of described community, has motor-driven valve.

Described intelligent heat exchange station, is characterized in that: described concentrated heat exchange station comprises one-level net feed pipe, one-level net return pipe, secondary net feed pipe, secondary net return pipe, secondary net filling pipe, secondary net heat exchanger; Described one-level net feed pipe, one-level net return pipe, secondary net feed pipe, secondary net return pipe are provided with thermometer, Pressure gauge and flowmeter; One-level net return pipe is connected with secondary net return pipe by flowmeter, Pressure gauge, motor-driven valve, circulating pump, secondary net feed pipe connects secondary net return pipe, secondary net filling pipe, on described secondary net feed pipe, be equiped with secondary net circulating pump, described secondary net circulating pump variable ratio frequency changer regulates.

Beneficial effect: the intelligent heat exchange station that the utility model provides, by control module and monitoring center, Real-Time Monitoring and a large amount of physical quantity of collection, as analog quantity parameters such as pressure, temperature, flows, and by PLC, these parameters are carried out to Real-time Collection and processing, realize the whole process of whole admission and water supply process and monitor in real time, can macroscopic view grasp heating system operation conditions, running quality, guarantee the operational factor of heating system; The hydraulic regime of heat supply network and heating power operating mode are carried out to full-automatic regulation, solve the coupling influence of each heat exchange station, eliminate heat supply network water supply imbalance, balance heating effect.

Accompanying drawing explanation

Fig. 1 is the structural representation of the intelligent heat exchange station of the utility model;

Fig. 2 is the control module structure chart of the intelligent heat exchange station of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

As depicted in figs. 1 and 2, a kind of intelligent heat exchange station, comprise: Surveillance center, control module, heat supply network secondary heat exchange station, in the connecting line at described heat supply network secondary heat exchange station, be provided with a plurality of adjusting monitoring devices, described adjusting monitoring device is all connected with control module, described control module gathers in heat supply network secondary heat exchange station and regulates the data of monitoring device and process, and with wireless or wired ，Bing Yu Surveillance center of Surveillance center that sends data to, works in coordination with monitoring or independent monitoring.

Described intelligent heat exchange station, is characterized in that: described Surveillance center, for monitoring real-time parameter, real-time parameter comprises pressure, temperature, water level, flow, heat, voltage, the electric current in the connecting line at heat supply network secondary heat exchange station.The duty that comprises every the pump of respectively standing, each pressure of return water of standing, discharge pressure, return water temperature, leaving water temperature, water level, flow etc.It is pump operated that Surveillance center can long-rangely carry out open and close, can to every, each station pump, carry out separately starting and stopping control operation respectively.Simultaneously all right curve map, forms mode show heat exchange station real time data and historical data and Table Printing.Surveillance center monitors the one-level net of each thermal substation and heat/flow and the supply and return water temperature of secondary net loop, and the principle that adopts heat balance to distribute is carried out the further heat distribution of heat supply network.Surveillance center carries out the water head allocation of the whole network according to pressure diagram, at the thermal substation near thermal source, install self-power differential pressure controller additional.Heat supply network tentatively regulates by self-power differential pressure controller, tentatively accomplishes the hydraulic misadjustment of hydraulic equilibrium elimination system condition.Surveillance center's acquisition and recording various technological parameters, as: heat, temperature, pressure, flow, voltage, electric current etc., there is the functions such as real-time data acquisition, real-time data curve, the on-the-spot animation demonstration of real-time Simulation, abnormal alarm, Long-distance Control, the inquiry of historical data, history curve, printing, geography information, for heat supply data query, heat supply analysis calculates good foundation is provided, also for heat supply in the coming year is laid a good foundation.

As shown in Figure 2, described intelligent heat exchange station, it is characterized in that: described control module is PLC controller, for controlling the electrical adjustable device of water intaking valve, outlet valve, circulating pump, small pump work, with monitor temperature, pressure, flow, circulating pump state, small pump state, control valve opening, carry out small pump variable frequency adjustment and circulating pump variable frequency adjustment simultaneously, and be connected with data display unit, data processing unit, network communication unit, alarm indication unit, input operation unit.

Described intelligent heat exchange station, is characterized in that: described heat supply network secondary heat exchange station comprises community heat exchange station and concentrated heat exchange station.

In technical solutions of the utility model, at each heat exchange station, control module is installed, heat service condition that can accurate-metering user, can on-the-spot query note, also by network, be sent to Surveillance center simultaneously, carry out statistical summaries, be convenient to grasp the operation service condition of whole heating network, by significant to the economy of heating network operation and energy-saving run to the analysis of thermal data.Sensor for PLC controller configuration in heat exchange station is inflow temperature sensor, back into water temperature sensor, pressure sensor and flow sensor, sensor will be sent to router by the ethernet communication module with PLC controller by data after each technological parameter Real-time Collection; Meanwhile, also can receive by this communication module instruction and the parameter of Surveillance center.For make the more durable and heat supply temperature of pipe network steadily, pipe network hydraulic pressure when work must keep constant, or swinging up and down by a small margin.If the current intake pressure value of secondary network is less than setup pressure value, improves circulating pump operating frequency, otherwise reduce its operating frequency.The result regulating is, secondary network intake pressure equals rated pressure value, and circulating pump keeps constant operating frequency.

Water is in the process of circulation, and due to a variety of causes, hydraulic pressure diminishes gradually.If the current pressure of return water value of secondary network is less than setup pressure value, improves small pump operating frequency, otherwise reduce its operating frequency.Secondary network pressure of return water equals setup pressure value, and small pump quits work.

Heat exchange station mainly completes the exchange heat from heat supply one secondary net to secondary network, and the hot water temperature of the secondary network displacing is generally between 40 ℃-65 ℃.Heat exchange station monitoring system can be carried out signals collecting measurement, control, teletransmission to the temperature of heat supply network, pressure, flow, switching value etc., monitor in real time a secondary net, secondary network temperature, pressure, flow, circulating pump, small pump running status, and the parameters information such as high water tank, and then heat supplying process is effectively monitored and controlled.At heating period, can regulate secondary network supply and return water temperature (can manually, automatically switch) by outdoor temperature, reach heating according to need, realize weather compensation Energy Saving Control; Also can carry out timesharing subregion Energy Saving Control, realize heat supply the whole network heat balance and save the energy.

Control module PLC major function is that each heat exchange station, heat supply each node along the line, hot user's operational factor (first and second net temperature, pressure, flow etc.), various device running status are monitored in real time and gathered, and automatically adjust by predefined control strategy heat exchanging station circulating pump, small pump and control valve according to the variation of weather environment and load, realize the complete Automatic Control of heat exchange unit.If there is the support of communication network, the data that reflection can also be changed heat supply running in on-site supervision station are sent to Surveillance center, receive the control instruction that Surveillance center sends simultaneously.

The control strategy of control valve, heat exchange station control system has weather compensation and constant temperature water supply function, according to the variation of weather, automatically regulates heating load.Application Programmable Logic Controller (PLC), according to the variation of outdoor temperature and local thermic load curve, determine the heating load of secondary net side, after actual measurement heating load and setting value are compared, controller output signal is to electric control valve, regulate the aperture of electric control valve, thereby change the flow of one-level net side, realize secondary net side heating load and regulate.

Automatic water supplement is to export a control signal after the pressure signal that detected by pressure transmitter on secondary network side water return pipeline and controller top backwater pressure set points, regulates the rotating speed of small pump, thus realize secondary network backwater automatic makeup to.

When secondary network side pressure of return water sets value lower than ultralow limit, automatically stop pump operating cycle, and close electric control valve, automatic water replenishing system puts into operation, starts moisturizing.After automatic water replenishing system puts into operation, secondary network side pressure of return water still continues to reduce the warning of signaling.

Circulating pump is that the circulatory system for secondary network provides power, in thermal substation secondary network dynamical system is controlled, adopts mode that circulating pump is controlled for backwater pressure reduction in conjunction with secondary network to control secondary network circulatory system pressure by circulating pump and maintains a steady state value.Heat-exchanging station controlling system, according to the actual conditions of each system, is set a confession backwater pressure reduction desired value, and sets secondary network confession backwater pressure difference to meet the heating water circulation of secondary pipe network.On this basis, thermal substation robot control system(RCS) changes for backwater pressure reduction by secondary network being detected, and circulating pump, under the control of frequency converter, reduces or improve rotating speed, by secondary network for backwater pressure differential maintain at a steady state value.The control mode of small pump is according to detecting pump entry place pressure, having control module to judge whether to start small pump to secondary network moisturizing.The dynamical system of circulating pump coordinates the water charging system of small pump, makes heat exchange station system can realize constant temperature and pressure and controls.

Small pump frequency control level pressure selects bypass pressure as controlled variable, keeps pressure given value fixed constant, by pressure sensor, records the force value on small pump bypass pipe, and the pressure signal of acquisition and pressure given value are compared.If the error of existence, by adjuster, carry out the input current that computing obtains frequency converter, frequency converter is according to the size of input current value, automatic frequency aligning rate regulates, then frequency frequency converter being calculated is as the frequency of small pump work, thereby also changed the flow of small pump, by regulating refill flow to make constant pressure point pressure keep invariable.

This patent mainly adopts Surveillance center's polling mode to communicate.The warning message initiatively sending for control module, Surveillance center adopts the mode of interrupting to realize communication.First Surveillance center sends to control module the instruction that receives data, and control module receives after the instruction from Surveillance center, judges, sees that whether it is correct, if correctly ，Ze Xiang Surveillance center transmits data; Otherwise control module refusal transmits data to Surveillance center.Whether Surveillance center also will carry out correct judgment after receiving the data that control module transmits, if correct, receive, otherwise rejection.

The warning function of Surveillance center is mainly used in the situation of change that ancillary staff monitors each unit operation parameter, once occur abnormal, to operating personnel, give the alarm immediately, so that staff checks alarm signal nidus in the very first time, and make rapidly respective handling, to reduce the infringement that system is caused, thereby greatly reduce the loss of equipment.Described warning function comprises temperature, the upper limit of pressure warning of primary side, secondary side; The fault alarm of circulating pump and small pump.

By this intelligent heat-exchange station, can macroscopic view grasp heating system operation conditions, running quality.Guarantee the operational factor of heating system.The hydraulic regime of heat supply network and heating power operating mode are carried out to full-automatic regulation, solve the coupling influence of each heat exchange station, eliminate heat supply network water supply imbalance, balance heating effect.

The above is only preferred embodiment of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.