CN217057670U - Multi-cold re-heat supply unit flow pressure combined control system - Google Patents
Multi-cold re-heat supply unit flow pressure combined control system Download PDFInfo
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- CN217057670U CN217057670U CN202220727024.7U CN202220727024U CN217057670U CN 217057670 U CN217057670 U CN 217057670U CN 202220727024 U CN202220727024 U CN 202220727024U CN 217057670 U CN217057670 U CN 217057670U
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Abstract
The utility model relates to a flow pressure combined control system for a plurality of cold and heat re-supply machine sets, which comprises a plurality of machine sets, a heat supply main pipe, a plurality of machine sets, a generating power metering device and a flow pressure controller; each unit is respectively communicated with a heat supply main pipe, a unit cold reheating flow meter and a unit cold reheating steam extraction regulating valve are arranged between each unit and the heat supply main pipe, and a heat supply main pipe pressure sensor is arranged on the heat supply main pipe; the multi-unit generating power metering device is electrically connected with the plurality of units; the multi-unit generating power metering device, the heat supply main pipe pressure sensor and the cold and heat supply flowmeters of all the units are electrically connected to the input end of the flow pressure controller, and the output end of the flow pressure controller is electrically connected with the cold and heat extraction regulating valves of all the units respectively. The utility model discloses a flow control of many units and pressure regulation's joint operation can guarantee again that main pipe steam parameter is stable for the energy saving and emission reduction that can realize the factory level heat supply unit provides the hardware basis.
Description
Technical Field
The utility model relates to an energy distribution field, concretely relates to many cold heat engine group flow pressure combined control system that supplies again.
Background
With the rapid development of Chinese economy, the demand for energy is more and more vigorous, and the energy shortage can seriously restrict the development of Chinese economy. The heat supply unit needs to meet the power requirements of enterprises and residents on one hand and meet the steam demand of industrial production enterprises on the other hand, so that the energy-saving optimization control work of the heat supply unit still has a large space.
In recent years, plant-level load scheduling provides a new idea for energy-saving optimization of a heat supply unit, a thermal power plant bears the heat load requirement of a certain area, along with the application of a thermoelectric decoupling technology, the heat supply mode is flexible and various, the operation boundary and safety protection constraint are various, and a unified plant-level heat supply scheduling platform is urgently needed to perform heat and electricity load scheduling, so that the economic performance and the safety performance of unit operation are improved.
In the current engineering practice, in order to ensure the steam temperature and pressure requirements of a user side, the unit mostly adopts pressure control, but the actual flow requirements of the user and the steam supply flow of a plant side are not balanced in real time due to the characteristics of large inertia and large delay of a heat supply pipeline, and the flow difference is large; on the other hand, the pressure control can not realize the adjustment of the heat supply flow of a single unit, the control is relatively extensive, and the purpose of energy conservation can not be realized by plant-level heat supply.
The heat supply of the unit is controlled by adopting flow, and because of the network safety requirement of a power plant, the heat user requirement data unit side cannot be transmitted to a DCS (distributed control system) closed loop to obtain the heat user requirement data, so that the heat supply of the unit is generally scheduled by a personnel experience telephone in the actual operation of the heat supply unit, although the adjustment of heat supply can be realized, no specific economic evaluation index exists, and the adjustment of personnel along with the change of electric load cannot be optimized in real time; on the other hand, the method is limited by a data acquisition mode, and the pressure fluctuation of the main pipe is large and the steam parameters of the main pipe are unstable due to the adoption of flow regulation.
Therefore, how to realize energy conservation and emission reduction of the plant-level heat supply unit and ensure the stability of steam parameters of the main pipe is the direction of the current efforts.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a many cold heat resupply units flow pressure combined control system is provided, can guarantee again for the energy saving and emission reduction that can realize the factory level heat supply unit that the main pipe steam parameter is stable provides the hardware basis.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a flow pressure combined control system for a plurality of cold and heat re-supply machine sets comprises a plurality of machine sets, a heat supply main pipe, a plurality of machine sets, a power generation power metering device and a flow pressure controller;
each unit is respectively communicated with the heat supply main pipe through a corresponding unit pipeline, a unit cold re-heating flow meter and a unit cold re-steam extraction regulating valve are arranged on the unit pipeline communicated with the heat supply main pipe, and a heat supply main pipe pressure sensor is arranged on the heat supply main pipe;
the input end of the multi-unit generating power metering device is electrically connected with the plurality of units respectively;
the flow pressure controller is internally pre-stored with a set value of heat supply main pipe pressure, the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor and the unit cold and heat resupply flow meter arranged on the unit pipeline of each unit communicated with the heat supply main pipe are all electrically connected on the input end of the flow pressure controller, and the output end of the flow pressure controller is respectively and electrically connected with the unit cold and heat resupply regulating valve arranged on each unit pipeline.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, dividing the plurality of machine sets into two machine set sets, namely a first machine set and a second machine set;
the flow pressure controller comprises a flow controller and a pressure controller, and pressure set values of the heat supply main pipe are prestored in the flow controller and the pressure controller;
the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor and the unit cold and re-heat supply flow meter arranged on the unit pipeline communicated with the heat supply main pipe of each unit are electrically connected to the input end of the flow controller, and the output end of the flow controller is respectively and electrically connected with the unit cold and re-steam extraction regulating valve arranged on the unit pipeline communicated with the heat supply main pipe of each unit in the first unit set;
the heat supply main pipe pressure sensor is also electrically connected to the input end of the pressure controller, and the output end of the pressure controller is electrically connected to the unit cold re-steam extraction regulating valve arranged on the unit pipeline communicated with the heat supply main pipe and each unit in the second unit set.
Furthermore, the high-pressure cylinder exhaust port of each unit is communicated with the heat supply main pipe through a corresponding unit pipeline.
Furthermore, each unit and the unit pipeline communicated with the heat supply main pipe are provided with cold re-steam extraction check valves.
Furthermore, a cold re-steam extraction check valve, a cold re-steam extraction regulating valve and a cold re-heat supply flow meter of the unit, which are arranged on each unit pipeline, are sequentially arranged.
Further, the plurality of units include a No. 1 unit, a No. 2 unit and a No. 3 unit, the unit pipes include a No. 1 unit pipe, a No. 2 unit pipe and a No. 3 unit pipe, the unit cold and heat supply flow meter includes a No. 1 unit cold and heat supply flow meter, a No. 2 unit cold and heat supply flow meter and a No. 3 unit cold and heat supply flow meter, and the unit cold and steam re-extraction regulating valve includes a No. 1 unit cold and steam re-extraction regulating valve, a No. 2 unit cold and steam re-extraction regulating valve and a No. 3 unit cold and steam re-extraction regulating valve; the machine set No. 1 is communicated with the heat supply main pipe through the machine set No. 1 pipeline, the machine set No. 2 is communicated with the heat supply main pipe through the machine set No. 2 pipeline, and the machine set No. 3 is communicated with the heat supply main pipe through the machine set No. 3 pipeline; the No. 1 unit cold and heat supply flow meter, the No. 2 unit cold and heat supply flow meter and the No. 3 unit cold and heat supply flow meter are correspondingly arranged on the No. 1 unit pipeline, the No. 2 unit pipeline and the No. 3 unit pipeline; the No. 1 unit pipeline, the No. 2 unit pipeline and the No. 3 unit pipeline are correspondingly provided with the No. 1 unit cold re-steam extraction regulating valve, the No. 2 unit cold re-steam extraction regulating valve and the No. 3 unit cold re-steam extraction regulating valve;
the input end of the multi-unit generating power metering device is respectively and electrically connected with the unit No. 1, the unit No. 2 and the unit No. 3, the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor, the unit No. 1 cold and re-heat supply flow meter, the unit No. 2 cold and re-heat supply flow meter and the unit No. 3 cold and re-heat supply flow meter are all electrically connected with the input end of the flow pressure controller, and the output end of the flow pressure controller is respectively and electrically connected with the unit No. 1 cold and re-steam extraction regulating valve, the unit No. 2 cold and re-steam extraction regulating valve and the unit No. 3 cold and re-steam extraction regulating valve.
Furthermore, cold re-steam extraction check valves are arranged on unit pipelines communicated with the heat supply main pipes of the units, and comprise a No. 1 cold re-steam extraction check valve, a No. 2 cold re-steam extraction check valve and a No. 3 cold re-steam extraction check valve; no. 1 unit pipeline No. 2 unit pipeline and it is equipped with to correspond on the unit pipeline No. 3 the cold check valve of drawing steam again of No. 1 the cold check valve of drawing steam again of No. 2 and the cold check valve of drawing steam again of No. 3.
Further, the high pressure jar gas vent of No. 1 unit passes through No. 1 unit pipeline with the female pipe intercommunication of heat supply, the high pressure jar gas vent of No. 2 unit passes through No. 2 unit pipeline with the female pipe intercommunication of heat supply, the high pressure jar gas vent of No. 3 unit passes through No. 3 unit pipeline with the female pipe intercommunication of heat supply.
Further, the flow pressure controller comprises a flow controller and a pressure controller, and pressure set values of the heat supply main pipe are prestored in the flow controller and the pressure controller;
the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor, the No. 1 unit cold and re-heating flowmeter, the No. 2 unit cold and re-heating flowmeter and the No. 3 unit cold and re-heating flowmeter are electrically connected to the input end of the flow controller, and the output end of the flow controller is electrically connected with the No. 1 unit cold and re-steam extraction regulating valve and the No. 2 unit cold and re-steam extraction regulating valve respectively;
the heat supply main pipe pressure sensor is also electrically connected to the input end of the pressure controller, and the output end of the pressure controller is electrically connected with the No. 3 unit cold re-steam extraction regulating valve.
Further, the pressure controller is embodied as a PID controller.
The beneficial effects of the utility model are that: in the utility model, through the combined operation of flow regulation and pressure regulation of a plurality of units, on one hand, the flow demand of a heat supply main pipe is estimated and calculated and adjusted in real time, so that the flow regulation economic performance is calculated in real time according to the current unit electric load condition, the heat load dynamic distribution of different heat supply units is realized, and the purposes of energy conservation and emission reduction are achieved; on the other hand, the pressure regulation can solve the problem of pressure fluctuation caused in the flow regulation process and ensure the steam parameter quality of the steam enterprises. Therefore, the utility model discloses a for can realize the energy saving and emission reduction of factory level heat supply unit and can guarantee again that main pipe steam parameter stably provides the hardware basis.
Drawings
Fig. 1 is a block diagram of a flow pressure combined control system for multiple cold and heat re-supplying units according to the present invention;
fig. 2 is a block diagram illustrating a specific example of a flow pressure combined control system for multiple cold and heat re-supply units according to the present invention.
Detailed Description
The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a multi-cold and re-heat supply unit flow pressure combined control system comprises a plurality of units, a heat supply main pipe, a multi-unit generated power metering device and a flow pressure controller;
each unit is communicated with the heat supply main pipe through a corresponding unit pipeline, a unit cold re-heating flow meter and a unit cold re-steam extraction regulating valve are arranged on the unit pipeline communicated with the heat supply main pipe, and a heat supply main pipe pressure sensor is arranged on the heat supply main pipe;
the input end of the multi-unit generating power metering device is electrically connected with the plurality of units respectively;
the flow pressure controller is internally pre-stored with a set value of heat supply main pipe pressure, the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor and the unit cold and heat resupply flow meter arranged on the unit pipeline of each unit communicated with the heat supply main pipe are all electrically connected on the input end of the flow pressure controller, and the output end of the flow pressure controller is respectively and electrically connected with the unit cold and heat resupply regulating valve arranged on each unit pipeline.
Specifically, the plurality of units are divided into two unit sets, namely a first unit set and a second unit set;
the flow pressure controller comprises a flow controller and a pressure controller, and pressure set values of the heat supply main pipe are prestored in the flow controller and the pressure controller;
the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor and the unit cold and re-heat supply flow meter arranged on the unit pipeline communicated with the heat supply main pipe of each unit are electrically connected to the input end of the flow controller, and the output end of the flow controller is respectively and electrically connected with the unit cold and re-steam extraction regulating valve arranged on the unit pipeline communicated with the heat supply main pipe of each unit in the first unit set;
the heat supply main pipe pressure sensor is also electrically connected to the input end of the pressure controller, and the output end of the pressure controller is electrically connected with each unit in the second unit set and a unit cold re-steam extraction regulating valve arranged on a unit pipeline communicated with the heat supply main pipe.
Specifically, the exhaust port of the high-pressure cylinder of each unit is communicated with the heat supply main pipe through a corresponding unit pipeline.
Specifically, a cold re-steam extraction check valve is further arranged on a unit pipeline communicated with the heat supply main pipe.
Specifically, a cold re-steam extraction check valve, a cold re-steam extraction regulating valve and a cold re-heat supply flow meter of the unit, which are arranged on each unit pipeline, are sequentially arranged.
In this particular embodiment:
as shown in fig. 2, the plurality of units include a unit No. 1, a unit No. 2, and a unit No. 3, the unit pipes include a unit No. 1 pipe, a unit No. 2 pipe, and a unit No. 3 pipe, the unit cold re-heat flow meter includes a unit No. 1 cold re-heat flow meter, a unit No. 2 cold re-heat flow meter, and a unit No. 3 cold re-heat flow meter, and the unit cold re-steam extraction regulating valve includes a unit No. 1 cold re-steam extraction regulating valve, a unit No. 2 cold re-steam extraction regulating valve, and a unit No. 3 cold re-steam extraction regulating valve; the machine set No. 1 is communicated with the heat supply main pipe through the machine set No. 1 pipeline, the machine set No. 2 is communicated with the heat supply main pipe through the machine set No. 2 pipeline, and the machine set No. 3 is communicated with the heat supply main pipe through the machine set No. 3 pipeline; the No. 1 unit cold and heat supply flow meter, the No. 2 unit cold and heat supply flow meter and the No. 3 unit cold and heat supply flow meter are correspondingly arranged on the No. 1 unit pipeline, the No. 2 unit pipeline and the No. 3 unit pipeline; the No. 1 unit pipeline, the No. 2 unit pipeline and the No. 3 unit pipeline are also correspondingly provided with the No. 1 unit cold re-steam extraction regulating valve, the No. 2 unit cold re-steam extraction regulating valve and the No. 3 unit cold re-steam extraction regulating valve;
the input end of the multi-unit generating power metering device is respectively and electrically connected with the unit No. 1, the unit No. 2 and the unit No. 3, the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor, the unit No. 1 cold and re-heat supply flow meter, the unit No. 2 cold and re-heat supply flow meter and the unit No. 3 cold and re-heat supply flow meter are all electrically connected to the input end of the flow pressure controller, and the output end of the flow pressure controller is respectively and electrically connected with the unit No. 1 cold and re-steam extraction regulating valve, the unit No. 2 cold and re-steam extraction regulating valve and the unit No. 3 cold and re-steam extraction regulating valve.
Specifically, cold re-steam extraction check valves are arranged on unit pipelines communicated with the heat supply main pipes of the units, and comprise a No. 1 cold re-steam extraction check valve, a No. 2 cold re-steam extraction check valve and a No. 3 cold re-steam extraction check valve; no. 1 unit pipeline No. 2 unit pipeline and No. 3 correspond on the unit pipeline and be equipped with No. 1 cold check valve of drawing steam again No. 2 cold check valve of drawing steam again and No. 3 cold check valve of drawing steam again.
Specifically, the high pressure jar gas vent of No. 1 unit passes through No. 1 unit pipeline with the female pipe intercommunication of heat supply, the high pressure jar gas vent of No. 2 unit passes through No. 2 unit pipeline with the female pipe intercommunication of heat supply, the high pressure jar gas vent of No. 3 unit passes through No. 3 unit pipeline with the female pipe intercommunication of heat supply.
Specifically, the flow pressure controller comprises a flow controller and a pressure controller, and pressure set values of the heat supply main pipe are prestored in both the flow controller and the pressure controller;
the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor, the No. 1 unit cold re-heating flowmeter, the No. 2 unit cold re-heating flowmeter and the No. 3 unit cold re-heating flowmeter are all electrically connected to the input end of the flow controller, and the output end of the flow controller is respectively electrically connected with the No. 1 unit cold re-steam extraction regulating valve and the No. 2 unit cold re-steam extraction regulating valve;
the heat supply main pipe pressure sensor is also electrically connected to the input end of the pressure controller, and the output end of the pressure controller is electrically connected with the No. 3 unit cold re-steam extraction regulating valve.
The present invention is directed to a PI D controller.
In this particular embodiment: the steam of the steam exhaust part of the high-pressure cylinder of the No. 1 unit flows through the No. 1 cold re-steam extraction check valve, and flow regulation control is carried out through the No. 1 unit cold re-steam extraction regulating valve; the steam of the steam exhaust part of the high-pressure cylinder of the No. 2 unit flows through the No. 2 cold re-steam extraction check valve, and flow regulation and control are carried out through the No. 2 unit cold re-steam extraction regulating valve; steam of the high-pressure cylinder steam exhaust part of the No. 3 unit flows through the No. 3 cold re-steam extraction check valve, and the pressure regulation control of the main pipe is carried out through the No. 3 unit cold re-steam extraction regulating valve. Under the condition that the proper cold re-flow of the No. 3 unit is reserved for the current electric load of the No. 3 unit, the flow controller calculates the optimal heat load distribution of the No. 1 unit and the No. 2 unit according to all parameters, and then flow control of the cold re-steam extraction regulating valve of the No. 1 unit and the cold re-steam extraction regulating valve of the No. 2 unit is completed. The reserved cold re-flow of the No. 3 unit can ensure that the heat supply flow of the No. 3 unit can be adjusted up and down; and based on the pressure deviation between the measured value of the heat supply main pipe pressure sensor and the set value of the heat supply main pipe pressure, the opening of the No. 3 unit cold re-extraction regulating valve is regulated through a pressure controller PI D, and the pressure of the main pipe is ensured to be maintained in a proper operation range.
It should be noted that: the utility model provides a flow controller and pressure controller's control process all is flow controller and pressure controller's function itself, the utility model does not relate to computer program's improvement, the utility model discloses aim at protecting each hardware and the relation of connection between each hardware.
In the utility model, through the combined operation of the flow regulation of two units and the pressure regulation of one unit, on one hand, the flow demand estimation calculation and the real-time regulation of the heat supply main pipe are realized, so that the flow regulation economic performance real-time calculation is carried out according to the current unit electric load condition, the heat load dynamic distribution of the two heat supply units is realized, and the purposes of energy conservation and emission reduction are achieved; on the other hand, the problem of pressure fluctuation caused in the flow regulation process can be solved by single pressure regulation, and the steam parameter quality of a steam enterprise is ensured. Therefore, the utility model discloses a for can realize the energy saving and emission reduction of factory level heat supply unit and can guarantee again that main pipe steam parameter stably provides the hardware basis.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a many cold heat resupply banks flow pressure combined control system which characterized in that: the system comprises a plurality of units, a heat supply main pipe, a multi-unit generating power metering device and a flow pressure controller;
each unit is respectively communicated with the heat supply main pipe through a corresponding unit pipeline, a unit cold re-heating flow meter and a unit cold re-steam extraction regulating valve are arranged on the unit pipeline communicated with the heat supply main pipe, and a heat supply main pipe pressure sensor is arranged on the heat supply main pipe;
the input end of the multi-unit generating power metering device is electrically connected with the plurality of units respectively;
the flow pressure controller is internally pre-stored with a set value of heat supply main pipe pressure, the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor and the unit cold and heat resupply flow meter arranged on the unit pipeline of each unit communicated with the heat supply main pipe are all electrically connected on the input end of the flow pressure controller, and the output end of the flow pressure controller is respectively and electrically connected with the unit cold and heat resupply regulating valve arranged on each unit pipeline.
2. The multiple cold and heat re-supply unit flow pressure combined control system of claim 1, wherein: dividing the plurality of units into two unit sets which are respectively a first unit set and a second unit set;
the flow pressure controller comprises a flow controller and a pressure controller, and pressure set values of the heat supply main pipe are prestored in the flow controller and the pressure controller;
the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor and a unit cold and re-heat supply flow meter arranged on a unit pipeline for communicating each unit with the heat supply main pipe are all electrically connected to the input end of the flow controller, and the output end of the flow controller is respectively and electrically connected with a unit cold and re-steam extraction regulating valve arranged on a unit pipeline for communicating each unit with the heat supply main pipe in the first unit set;
the heat supply main pipe pressure sensor is also electrically connected to the input end of the pressure controller, and the output end of the pressure controller is electrically connected to the unit cold re-steam extraction regulating valve arranged on the unit pipeline communicated with the heat supply main pipe and each unit in the second unit set.
3. The multiple cold and heat re-supply unit flow pressure combined control system of claim 1, wherein: and the high-pressure cylinder exhaust port of each unit is communicated with the heat supply main pipe through a corresponding unit pipeline.
4. The multiple cold and heat re-supply unit flow pressure combined control system of claim 1, wherein: and cold re-steam extraction check valves are also arranged on unit pipelines communicated with the heat supply main pipes of the units.
5. The multiple cold and heat re-supply unit flow pressure combined control system of claim 4, wherein: and the cold re-steam extraction check valve, the cold re-steam extraction regulating valve and the cold re-heat supply flowmeter are arranged on each unit pipeline in sequence.
6. The multiple cold and heat re-supply unit flow pressure combined control system according to any one of claims 1 to 5, wherein: the multiple units comprise a unit No. 1, a unit No. 2 and a unit No. 3, the unit pipelines comprise a unit No. 1 pipeline, a unit No. 2 pipeline and a unit No. 3 pipeline, the unit cold re-heating flow meter comprises a unit No. 1 cold re-heating flow meter, a unit No. 2 cold re-heating flow meter and a unit No. 3 cold re-heating flow meter, and the unit cold re-steam extraction regulating valve comprises a unit No. 1 cold re-steam extraction regulating valve, a unit No. 2 cold re-steam extraction regulating valve and a unit No. 3 cold re-steam extraction regulating valve; the machine set No. 1 is communicated with the heat supply main pipe through the machine set No. 1 pipeline, the machine set No. 2 is communicated with the heat supply main pipe through the machine set No. 2 pipeline, and the machine set No. 3 is communicated with the heat supply main pipe through the machine set No. 3 pipeline; the No. 1 unit cold and heat supply flow meter, the No. 2 unit cold and heat supply flow meter and the No. 3 unit cold and heat supply flow meter are correspondingly arranged on the No. 1 unit pipeline, the No. 2 unit pipeline and the No. 3 unit pipeline; the No. 1 unit pipeline, the No. 2 unit pipeline and the No. 3 unit pipeline are also correspondingly provided with the No. 1 unit cold re-steam extraction regulating valve, the No. 2 unit cold re-steam extraction regulating valve and the No. 3 unit cold re-steam extraction regulating valve;
the input end of the multi-unit generating power metering device is respectively and electrically connected with the unit No. 1, the unit No. 2 and the unit No. 3, the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor, the unit No. 1 cold and re-heat supply flow meter, the unit No. 2 cold and re-heat supply flow meter and the unit No. 3 cold and re-heat supply flow meter are all electrically connected with the input end of the flow pressure controller, and the output end of the flow pressure controller is respectively and electrically connected with the unit No. 1 cold and re-steam extraction regulating valve, the unit No. 2 cold and re-steam extraction regulating valve and the unit No. 3 cold and re-steam extraction regulating valve.
7. The combined control system for flow and pressure of multiple cold and heat re-supply units as claimed in claim 6, wherein: cold re-steam extraction check valves are arranged on unit pipelines communicated with the heat supply main pipes of the units, and comprise a No. 1 cold re-steam extraction check valve, a No. 2 cold re-steam extraction check valve and a No. 3 cold re-steam extraction check valve; no. 1 unit pipeline No. 2 unit pipeline and No. 3 correspond on the unit pipeline and be equipped with No. 1 cold check valve of drawing steam again No. 2 cold check valve of drawing steam again and No. 3 cold check valve of drawing steam again.
8. The combined control system for flow and pressure of multiple cold and heat re-supply and re-supply engine groups as claimed in claim 6, wherein: the high-pressure cylinder gas vent of No. 1 unit passes through No. 1 unit pipeline with the female pipe intercommunication of heat supply, the high-pressure cylinder gas vent of No. 2 unit passes through No. 2 unit pipeline with the female pipe intercommunication of heat supply, the high-pressure cylinder gas vent of No. 3 unit passes through No. 3 unit pipeline with the female pipe intercommunication of heat supply.
9. The combined control system for flow and pressure of multiple cold and heat re-supply and re-supply engine groups as claimed in claim 6, wherein: the flow pressure controller comprises a flow controller and a pressure controller, and pressure set values of the heat supply main pipe are prestored in the flow controller and the pressure controller;
the output end of the multi-unit generating power metering device, the heat supply main pipe pressure sensor, the No. 1 unit cold re-heating flowmeter, the No. 2 unit cold re-heating flowmeter and the No. 3 unit cold re-heating flowmeter are all electrically connected to the input end of the flow controller, and the output end of the flow controller is respectively electrically connected with the No. 1 unit cold re-steam extraction regulating valve and the No. 2 unit cold re-steam extraction regulating valve;
the heat supply main pipe pressure sensor is also electrically connected to the input end of the pressure controller, and the output end of the pressure controller is electrically connected with the No. 3 unit cold re-steam extraction regulating valve.
10. The multiple cold and re-heat supply unit flow pressure combined control system according to claim 2 or 9, characterized in that: the pressure controller is specifically a PID controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220727024.7U CN217057670U (en) | 2022-03-30 | 2022-03-30 | Multi-cold re-heat supply unit flow pressure combined control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220727024.7U CN217057670U (en) | 2022-03-30 | 2022-03-30 | Multi-cold re-heat supply unit flow pressure combined control system |
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| CN217057670U true CN217057670U (en) | 2022-07-26 |
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| CN202220727024.7U Active CN217057670U (en) | 2022-03-30 | 2022-03-30 | Multi-cold re-heat supply unit flow pressure combined control system |
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