CN203395967U - Heating station energy-saving device with dual-adjustment function - Google Patents

Abstract

The utility model discloses a heating station energy-saving device with a dual-adjustment function, which belongs to the field of energy saving for central heating. The heating station energy-saving device with the dual-adjustment function is characterized by comprising a dual-adjustment control host (1), an outdoor temperature sensor (2), a heat exchanger (3), a secondary water supply temperature sensor (6), a secondary water return temperature sensor (7), a secondary bypass tube (4), a unidirectional electric adjustment valve (5), a secondary water mixing temperature sensor (8), a secondary water mixing pressure sensor (10), a secondary water return pressure sensor (11) and a water pump frequency converter (9); the openness of the electric adjustment valve on the secondary bypass tube is adjusted according to the parameters monitored by the outdoor temperature sensor, a part of secondary lateral return water enters in the heat exchanger to exchange heat, and the other part passes through a bypass tube, and achieves an expected water supply temperature after water mixing; and an instruction is sent to the water pump frequency converter according to the parameters monitored by the secondary water mixing pressure sensor and the secondary water return pressure sensor to adjust the running frequency of a water pump, so as to change a secondary water supply flow. The device realizes climate compensation control and on-demand heat supply, and decreases the running electricity consumption of the water pump.

Description

An Energy Saving Device for Thermal Power Station with Double Regulating Function

technical field

The utility model belongs to the technical field of central heating and energy saving, in particular to an energy saving device for a thermal station with the functions of climate compensation and frequency conversion double regulation.

Background technique

The heat sources of the heating system (including boilers and heat exchange stations) are designed and constructed according to the extreme cold weather parameters. Without adjustment means, when the outdoor temperature rises or the solar radiation conditions are good, the end users will overheat, resulting in Waste of heat. Climate compensation is an energy-saving device that realizes on-demand heating. It adjusts the water supply temperature according to changes in outdoor air temperature, reduces the user's heat supply, reduces terminal overheating, and achieves energy saving and consumption reduction.

At present, most of the climate compensation devices used in engineering are installed on the primary side of the heat source to directly control the water supply temperature of the boiler, or adjust the flow rate on the primary side of the thermal station to change the secondary water supply temperature of the thermal station. However, in actual engineering projects, especially large municipal heating network projects, it is impossible to realize the flow regulation and control of the primary side of the thermal station. In order to achieve the purpose of climate compensation, it is necessary to develop a climate compensation cabinet for secondary side regulation and control.

In the process of climate compensation, with the reduction of end-user heating heat, the temperature difference and pressure difference between the supply water and the return water decrease, the frequency conversion of the circulating water pump can be adjusted to reduce the power consumption of the water pump.

Utility model content

The utility model develops an energy-saving device for a thermal station with dual adjustment functions aimed at heating and heating systems. The utility model does not need to make any changes to the primary side of the thermal station, but adds a bypass pipeline to the secondary side to change the actual heat exchange flow rate of the secondary side, so as to achieve the purpose of secondary water supply temperature climate compensation.

A thermal station energy-saving device with dual adjustment functions, characterized in that it includes a dual adjustment control host 1, an outdoor temperature sensor 2, a heat exchanger 3, a secondary water supply temperature sensor 6, a secondary return water temperature sensor 7, and a secondary bypass pipe 4. One-way electric regulating valve 5, secondary mixing water temperature sensor 8, secondary mixing water pressure sensor 10, secondary return water pressure sensor 11 and water pump frequency converter 9;

The secondary return water pipeline is equipped with a secondary return water temperature sensor 7, a water pump frequency converter 9, and a secondary return water pressure sensor 11; the secondary return water pipeline is divided into two circuits, one is connected to one end of the heat exchanger 3, and the other is regulated by a one-way electric motor The valve 5 is connected to one end of the secondary bypass pipe 4, and a secondary water supply temperature sensor 6 is arranged between the other end of the heat exchanger 3 and the secondary bypass pipe 4; the other end of the heat exchanger 3 and the secondary bypass pipe The other ends of the pipes 4 are connected and combined to form a secondary mixing water pipeline, and a secondary mixing water temperature sensor 8 and a secondary mixing water pressure sensor 10 are arranged on the secondary mixing water pipeline.

Further, the primary side of the heat exchanger 3 is a municipal heating or regional boiler room.

The dual-regulation control host includes two modules: climate compensation and frequency conversion control. The climate compensation module has a built-in fitting curve corresponding to the outdoor temperature and the secondary mixing water temperature. The frequency conversion control module integrates the fitting curve of the pressure difference and frequency of supply and return water. .

According to the parameters monitored by the outdoor temperature sensor, the climate compensation module calculates the expected secondary water supply temperature, and adjusts the opening degree of the electric adjustment on the secondary bypass pipe so that part of the return water on the secondary side enters the heat exchanger for heat exchange, and part of it passes through the bypass pipe. Through the pipe, the expected water supply temperature is reached after mixing the water. The diameter of the bypass pipe needs to be calculated according to the resistance of the actual engineering project.

According to the monitoring parameters of the secondary mixed water pressure sensor and the secondary pressure sensor, the frequency conversion module calculates the expected pressure difference control target, sends instructions to the water pump frequency converter, adjusts the pump operation frequency, and changes the secondary water supply flow.

The primary side of the heat station can be municipal heat, regional boiler room or other heat sources. In the process of climate compensation on the secondary side, with the change of heat transfer on the secondary side of the thermal station, the heat released from the primary side also changes accordingly, and the temperature and flow parameters of the hot water supply and return of the primary side will change accordingly. The primary side is in a passive state of change.

The utility model integrates the climate compensation and the frequency conversion of the water pump, has a compact structure and complete functions, and reduces the difficulty of construction.

Beneficial effects of the utility model (1) Realize climate compensation control, heat supply on demand, realize heat saving; (2) Realize water pump frequency conversion control, reduce water pump operation power consumption; (3) Adopt the secondary side of the thermal station The bypass method changes the heat supply, reduces the transformation of the primary network, and is easy to implement; (4) monitors various operating parameters such as temperature and pressure of the thermal station, and automatically records the operation of the thermal station, reducing the workload of the operating personnel.

Description of drawings

Figure 1 is a schematic diagram of the energy-saving device of the thermal station with dual regulation functions.

In the figure: 1 dual-regulation control host; 2. Outdoor temperature sensor; 3. Heat exchanger; 4. Secondary bypass pipe; 5. One-way electric control valve; 6. Secondary water supply temperature sensor; 7. Secondary return water Temperature sensor; 8. Secondary mixed water temperature sensor; 9. Water pump inverter; 10. Secondary mixed water pressure sensor; 11. Secondary return water pressure sensor.

Detailed ways

The dual-regulation control host 1 includes a climate compensation module 1-1 and a water pump frequency conversion module 1-2. Dual regulation control host 1 collects the monitoring of outdoor temperature sensor 2, secondary water supply temperature sensor 6, secondary return water temperature sensor 7, secondary mixed water temperature sensor 8, secondary mixed water pressure sensor 10 and secondary return water pressure sensor 11 parameter.

The climate compensation module 1-1 of the dual-adjustment host adjusts the opening of the one-way electric control valve 5 on the secondary bypass pipe 4 according to the calculated heating temperature, reduces or increases the flow through the heat exchanger 3, and controls Secondary mixing water temperature 8, to achieve climate compensation.

The water pump frequency conversion module 1-2 of the dual-adjustment main engine adjusts the operating frequency of the water pump 9 according to the calculated pressure difference, so as to realize the change of the flow rate.

Claims (2)

1. a thermal substation energy saver for two regulatory functions, is characterized in that: comprise two main control system (1), outdoor temperature sensor (2), heat exchanger (3) secondary water-supply temperature sensor (6), secondary returning water temperature sensor (7), secondary bypass pipe (4), unidirectional electric control valve (5), secondary water-mixing temperature sensor (8), secondary mixed water pressure sensor (10), secondary returning water pressure sensor (11) and pump variable frequency devices (9) of regulating;

In secondary returning water lines, be provided with secondary returning water temperature sensor (7), pump variable frequency device (9), secondary returning water pressure sensor (11); Secondary returning water lines is divided two-way, one road is connected to one end of heat exchanger (3), the unidirectional electric control valve (5) of separately leading up to is connected to one end of secondary bypass pipe (4), between the other end of heat exchanger (3) and secondary bypass pipe (4), is provided with secondary water-supply temperature sensor (6); The other end of the other end of heat exchanger (3) and secondary bypass pipe (4) is connected, and to be merged into a road be the mixed water lines of secondary, in the mixed water lines of secondary, secondary water-mixing temperature sensor (8) is set and secondary mixes water pressure sensor (10).

2. the thermal substation energy saver of a kind of pair of regulatory function according to claim 1, is characterized in that: heat exchanger (3) primary side is municipal heating power or district boiler room.

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