CN116447066B - Pipeline pressure control and power generation system and control method thereof - Google Patents

Pipeline pressure control and power generation system and control method thereof Download PDF

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Publication number
CN116447066B
CN116447066B CN202310668873.9A CN202310668873A CN116447066B CN 116447066 B CN116447066 B CN 116447066B CN 202310668873 A CN202310668873 A CN 202310668873A CN 116447066 B CN116447066 B CN 116447066B
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water
pressure
bypass
pipeline
power generation
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CN202310668873.9A
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CN116447066A (en
Inventor
李茂林
赵昕
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China Architecture Design and Research Group Co Ltd
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China Architecture Design and Research Group Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/02—Public or like main pipe systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
    • E03B7/071—Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
    • E03B7/075—Arrangement of devices for control of pressure or flow rate
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/09—Component parts or accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B15/00—Controlling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B15/00—Controlling
    • F03B15/02—Controlling by varying liquid flow
    • F03B15/04—Controlling by varying liquid flow of turbines
    • F03B15/06—Regulating, i.e. acting automatically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B15/00—Controlling
    • F03B15/02—Controlling by varying liquid flow
    • F03B15/04—Controlling by varying liquid flow of turbines
    • F03B15/06—Regulating, i.e. acting automatically
    • F03B15/18—Regulating, i.e. acting automatically for safety purposes, e.g. preventing overspeed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Abstract

The application relates to a pipeline pressure control and power generation system and a control method thereof, wherein the pipeline pressure control and power generation system comprises a water supply pipeline and a bypass pipeline, the bypass pipeline is provided with a water inlet and a water outlet, and the water inlet and the water outlet are connected into the water supply pipeline; the hydraulic power generation device is arranged on the bypass pipeline, an electric regulating valve is arranged at the upstream of the hydraulic power generation device, and a pressure sensor is arranged at the downstream of the hydraulic power generation device. The water supply system can convert the overpressure water in the water supply system into electric energy, so that the resource utilization rate is improved, the consumption of a large amount of water energy at the pressure reducing valve is avoided, and the service lives of the pipeline and accessories are prolonged.

Description

Pipeline pressure control and power generation system and control method thereof
Technical Field
The application belongs to the technical field of building water supply and drainage and power generation, and particularly relates to a pipeline pressure control and power generation system and a control method thereof.
Background
In the water supply system, the water pressure at the most adverse point is ensured, so that the water supply system pressure is overpressurized for most other areas outside the tail end. In building water supply and drainage systems, the problem of water supply system overpressure is common, and particularly in high-rise and super-high-rise building water supply systems, in order to meet the highest water demand, a pump set is often used for secondary pressurized water supply, so that lower floors have serious overpressure.
In order to prevent the components in the water supply system from being damaged and ensure the comfort of water, the working pressure of water in a pipeline must not exceed the pressure range specified by the device, so that the pressure is reduced by an atmospheric and vacuum valve in the water supply system. The water pressurized by the pump set is energy-dissipated by the pressure reducing valve, so that huge energy waste is caused.
In addition, a large amount of water can be consumed at the pressure reducing valve, a series of problems such as cavitation abrasion, noise and vibration of the valve body can be necessarily generated due to long-term action, and the service lives of the pipeline and accessories are shortened.
Disclosure of Invention
In view of the above analysis, the embodiments of the present invention provide a pipeline pressure control and power generation system and a control method thereof, which are used for solving the problems of the existing water supply system that overpressure water can be wasted, and the service lives of pipelines and accessories are reduced due to overpressure.
The purpose of the invention is realized in the following way:
a pipeline pressure control and power generation system comprising:
a water supply pipe;
at least one bypass pipeline having a water inlet and a water outlet, the water inlet and the water outlet being connected to the water supply pipeline;
each bypass pipeline is provided with a water turbine power generation device, the upstream of each water turbine power generation device is provided with an electric regulating valve, and the downstream of each water turbine power generation device is provided with a pressure sensor.
Further, a pressure reducing valve is arranged on the water supply pipeline; the water inlet and the water outlet of the bypass pipeline are respectively positioned at the upstream and the downstream of the pressure reducing valve.
Further, two first stop valves are arranged on the water supply pipeline between the water inlet and the water outlet of the bypass pipeline, and the pressure reducing valve is positioned between the two first stop valves; the water inlet of the bypass pipeline and the water outlet of the bypass pipeline are both provided with second stop valves.
Further, the system further comprises a control system, wherein the control system is configured to independently control the valve opening degree of the electric regulating valve on each bypass pipeline based on the pressure data information monitored by the pressure sensor on each bypass pipeline, so that the pressure of the downstream water end is kept unchanged.
Further, the control system is further configured to monitor the working time T1 of the working hydro-generator devices, and if the working time T1 of one of the hydro-generator devices is greater than a threshold value, dynamically starting any one of the shutdown hydro-generator devices to replace the working hydro-generator device; the dynamic starting rule is that the closing time T2 of all the closed hydroelectric generating devices is judged, and the hydroelectric generating device with the longest closing time is started when the closing time T2 is compared with the maximum value.
Further, the control system is further configured to monitor the number N of the hydraulic power generation devices in operation preferentially, and if the number N of the hydraulic power generation devices in operation is smaller than the total number of the bypass pipelines, then judge the working time T1 and dynamically start the hydraulic power generation devices in shutdown; and if the working number N is equal to the number of the bypass pipelines, waiting for whether a closing instruction exists based on the pressure data information of the pressure sensor, and preferentially closing the hydroelectric generating device with the maximum working time T1 when the closing instruction is generated.
Further, the system also comprises an electric power control panel, wherein the electric power control panel is connected with the generator control of the water turbine generator and is configured to control the purpose of generating electric power so as to be connected into different electricity utilization scenes; the power control panel is in signal transmission connection with the control system.
Further, the bypass pipeline is provided with a shared water inlet pipe, a shared water outlet pipe and a plurality of bypass branches, the bypass branches are arranged between the water inlet pipe and the water outlet pipe in parallel, and each bypass branch is provided with a water turbine power generation device, an electric regulating valve and a pressure sensor.
Further, the number of the bypass pipelines is multiple, and the bypass pipelines are sequentially connected into the water supply pipeline.
In another aspect, a method for controlling a pipeline pressure control and a power generation system is provided, including the steps of:
in an initial state, a first electric regulating valve on the first bypass branch is opened, electric regulating valves on other bypass branches are closed, the current downstream water consumption can be met at the moment, and meanwhile, a first pressure sensor on the first bypass branch monitors the water pressure in the first bypass branch in real time;
after water starts, when the first pressure sensor monitors that the pressure value on the first bypass branch is lower than a preset lower limit pressure value, the first pressure sensor transmits a signal lower than the preset lower limit pressure value to a control system, and the control system controls the opening degree of a valve port of the first electric regulating valve to be gradually increased until the water pressure at a water outlet of the first bypass branch is controlled to be in a stable working state; if the downstream water consumption is reduced, the pressure monitored by the first pressure sensor is increased, the first pressure sensor transmits a signal of the pressure increase to the control system, and the valve port of the first electric regulating valve is controlled to be reduced to an initial state;
as the downstream water consumption continues to increase, the control system controls the first electric regulating valve to continuously increase the opening degree of the valve port until the first electric regulating valve is completely opened;
when the first electric regulating valve is completely opened, and the pressure value monitored by the first pressure sensor is lower than a preset lower limit pressure value, the water pressure of the first bypass branch cannot be maintained in a stable working state, the second electric regulating valve of the second bypass branch is opened, and the water pressure of the second bypass branch is regulated to the stable working state by controlling the opening size of the valve port of the second electric regulating valve; if the downstream water consumption is reduced, the pressure monitored by the second pressure sensor of the second bypass branch is increased, the second pressure sensor transmits a signal of the pressure increase to the control system, and the control system controls the valve port of the second electric regulating valve to be reduced until the valve port is completely closed;
the downstream water consumption is continuously increased, the process is repeated, and the electric regulating valve of the next bypass branch is sequentially opened, so that the water pressure of the downstream water consumption end is in a stable working state;
and in the process that water flows through the bypass branch, the water turbine is driven to rotate, and meanwhile, the generator is coupled to generate electric energy.
Compared with the prior art, the invention has at least one of the following beneficial effects:
a) According to the pipeline pressure control and power generation system provided by the invention, the bypass pipeline is arranged on the water supply pipeline, the water turbine power generation device and the pressure reducing valve are arranged in the water supply pipeline in parallel, so that the operation of the existing water supply pipeline is not influenced, part of energy of overpressure water in the water supply system can be converted into available electric energy by means of the water turbine power generation device, the resource utilization rate is improved, the tail water pressure of the water turbine power generation device does not influence the rear end use requirement of the water supply system, and the flow rate of the water turbine accords with the water demand of the water supply system; a part of high-pressure water energy is consumed by the water turbine generating set, so that a large amount of water energy is prevented from being consumed at the pressure reducing valve, and the service lives of the pipeline and accessories are prolonged.
b) The pipeline pressure control and power generation system provided by the invention has the advantages that the bypass pipeline is provided with the shared water inlet pipe, the shared water outlet pipe and the plurality of bypass branches, the plurality of bypass branches are arranged between the water inlet pipe and the water outlet pipe in parallel, and each bypass branch is provided with a group of water turbine power generation devices and electric regulating valves, so that the regulating range is wide, and continuous and accurate regulation during downstream water consumption fluctuation can be realized. Moreover, the basic model of hydroelectric power generation can be modularized, and for use occasions with different flow rates, pressure regulation and power generation can be realized by connecting a plurality of modules in parallel.
c) The pipeline pressure control and power generation system provided by the invention has the advantages that the pressure cannot be reduced to the use requirement even if the maximum load of the hydraulic power generation exceeds that of a single-group bypass pipeline for the excessive pressure, and the pressure regulation and power generation can be realized by connecting a plurality of modularized bypass pipelines in series.
d) According to the control method of the pipeline pressure control and power generation system, based on pressure data monitored by pressure sensors at different positions in a pipe network, the control system regulates and controls the water pressure of a bypass branch to be maintained in a stable working state in real time by controlling the valve opening states of electric regulating valves on different bypass branches, so that the normal water pressure of a downstream water end is ensured; meanwhile, in the process that water flows through the bypass branch, the water turbine is driven to rotate, and meanwhile, the generator is coupled to generate electric energy.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present description, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of a pipeline pressure control and power generation system according to the present invention;
FIG. 2 is a schematic diagram of a pipeline pressure control and power generation system for a building to which the present invention is applied;
fig. 3 is a schematic diagram of a pipeline pressure control and power generation system according to the present invention.
Reference numerals:
1-a water supply pipeline; 2-a bypass conduit; 3-a hydroelectric generation device; 4-an electric regulating valve; 5-a pressure sensor; 6-a pressure reducing valve; 7-a first shut-off valve; 8-a second shut-off valve; 9-a water turbine; a 10-generator; 11-a common water inlet pipe; 12-a common water outlet pipe; 13-a bypass branch; 14-a power control panel; 15-a control system; 16-electric field scene.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. It should be noted that embodiments and features of embodiments in the present disclosure may be combined, separated, interchanged, and/or rearranged with one another without conflict. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the drawings, the size and relative sizes of elements may be exaggerated for clarity and/or descriptive purposes. While the exemplary embodiments may be variously implemented, the specific process sequences may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in reverse order from that described. Moreover, like reference numerals designate like parts.
When an element is referred to as being "on" or "over", "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements present. For this reason, the term "connected" may refer to physical connections, electrical connections, and the like, with or without intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "top," "bottom," "below … …," "below … …," "under … …," "above … …," "upper," "above … …," "higher," and the like, relative to components to describe one component's relationship to another (other) component as illustrated in the figures.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising," and variations thereof, are used in the present specification, the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof is described, but the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximation terms and not as degree terms, and as such, are used to explain the inherent deviations of measured, calculated, and/or provided values that would be recognized by one of ordinary skill in the art.
Example 1
In one embodiment of the present invention, as shown in FIG. 1, a pipeline pressure control and power generation system is disclosed, comprising:
the water supply pipeline 1 is used as a water supply main pipeline and is connected with a downstream water end;
a bypass pipeline 2, which is provided with a water inlet and a water outlet, wherein the water inlet and the water outlet are connected into the water supply pipeline 1;
the hydraulic power generation device is characterized in that a hydraulic power generation device 3 is arranged on the bypass pipeline 2, an electric regulating valve 4 is arranged at the upstream of the hydraulic power generation device 3, and a pressure sensor 5 is arranged at the downstream of the hydraulic power generation device 3.
Compared with the prior art, the hydraulic power generation device 3 is arranged in the bypass pipeline 2 to replace the traditional pressure reducing valve 6, and the electric regulating valve 4 and the hydraulic power generation device 3 are controlled to control the water supply pressure of the water use end and generate hydraulic power without influencing the operation of the existing water supply pipeline 1.
It will be appreciated that the pipeline pressure control and power generation system in this embodiment may also be provided with a pressure reducing valve 6 on the water supply pipeline 1; the water inlet and the water outlet of the bypass conduit 2 are located upstream and downstream of the pressure relief valve 6, respectively. That is, the bypass pipeline 2, the hydroelectric device 3 and the electric control valve 4 which are arranged on the bypass pipeline 2 are arranged in parallel with the pressure reducing valve 6, the bypass pipeline and the pressure reducing valve 6 can respectively and independently operate or simultaneously operate through the pipeline communication state of the stop valve control system, and the system pressure reduction double insurance is realized. By adopting the pipeline pressure control and power generation system of the embodiment, for the existing water supply pipeline system, the bypass pipeline can be additionally arranged on the water supply main pipe of the conventional water supply system, the transformation is carried out under the condition that the existing main pipeline is not affected basically, and the system is suitable for the transformation scene.
In this embodiment, the pipeline pressure control and power generation system further includes a control system 15, where the control system 15 is configured to control the valve opening degree of the electric control valve 4 based on the set water demand pressure value, so that the pressure of the downstream water end remains unchanged, that is, the pressure value monitored by the pressure sensor 5 remains unchanged.
In an alternative embodiment, the control system is further configured to monitor the operating time T1 of the active hydroelectric generating device, and if the operating time T1 of one of the hydroelectric generating devices is greater than a threshold value, dynamically starting any shutdown hydroelectric generating device to replace the active hydroelectric generating device; the dynamic starting rule is as follows: and judging the closing time T2 of all the closing hydroelectric generating devices, and comparing the maximum closing time T2, and starting the hydroelectric generating device with the longest closing time. According to the technical scheme, the power generation device of one bypass pipeline can be prevented from working for a long time, and the other bypass power generation devices are closed all the time, so that one bypass pipeline is large in work load, the other bypass pipeline is lost in a long time and is easy to damage, dynamic flexible allocation can be realized, and the bypass pipeline can participate in working.
Further, the control system is further configured to monitor the number N of the hydraulic power generation devices in operation preferentially, and if the number N of the hydraulic power generation devices in operation is smaller than the total number of the bypass pipelines, then judge the working time T1 and dynamically start the hydraulic power generation devices in shutdown; and if the working number N is equal to the number of the bypass pipelines, waiting for whether a closing instruction exists based on the pressure data information of the pressure sensor, and preferentially closing the hydroelectric generating device with the maximum working time T1 when the closing instruction is generated. According to the technical scheme, when all the bypass pipeline generators are started, and when the bypass pipeline generators are judged to be closed, the generator with the longest working time is firstly closed, so that the overlong working time of the individual generators is avoided, and other generators are in a long-time closed state, so that all the bypass pipelines have the same or similar service lives.
When a plurality of bypass pipelines are arranged, the bypass pipeline which is started firstly every time when water is used for the first time can be started in turn, for example, the bypass pipeline with the number of N1 is started when the system is used for the first time, the bypass pipeline with the number of N2 is started when the system is used for the second time under automatic control, and the like, so that the idle damage of equipment caused by long-term non-starting of individual bypass pipelines is avoided.
In this embodiment, the pipeline pressure control and power generation system can ensure the water pressure at the downstream water end, so that the system accurately monitors and adjusts the pipeline network pressure through the sensor set at the electric control valve 4, and transmits a signal to the control system 15. Specifically, the pressure sensor 5 can transmit the monitored pressure data information to the control system 15, which controls the valve opening degree of the electric control valve 4 based on the received pressure data information so that the pressure value monitored by the pressure sensor 5 is unchanged.
Specifically, an electric control valve 4 is disposed upstream of the hydro-power generation device 3 on the bypass pipe 2, and a pressure sensor 5 disposed in the electric control valve 4 can transmit related information to the control system. Under the condition that the water pressure requirement of the downstream end is known, the pressure value of the downstream water is set to be a fixed value, the control system monitors the pressure value through the pressure sensor 5 and automatically adjusts the opening degree of the valve, so that the pressure of the downstream water end is unchanged, and the water at the tail end is not influenced. With the increase of the water consumption at the tail end, the opening degree of the electric regulating valve 4 is continuously increased, and finally, a stable state is achieved. At this time, the state of the generator 10 also reaches an efficient state, and stable electric power is continuously generated.
The pipeline pressure control and power generation system comprises the following working processes: after water starts, the pressure sensor 5 monitors the water pressure P in the bypass pipeline in real time, and when the monitored pressure value P is reduced to a preset lower limit pressure value, the control system 15 opens the electric regulating valve 4 until the pressure value monitored by the pressure sensor 5 is stabilized at the set working state of 0.2MPa; as the water consumption of the downstream water end continues to increase, the electric control valve 4 is in a fully opened state; as the water consumption of the downstream water side decreases, the water pressure P in the bypass pipe increases, and when the water pressure P exceeds a preset upper limit pressure value, the control system gradually closes the electric control valve 4 until it is completely closed. During the flow of water through the bypass conduit 2, the turbine 9 is driven in rotation, and the coupled generator 10 starts to generate electricity for use.
Wherein, the preset lower limit pressure value can be adjusted according to the actual demand, and preferably, the preset lower limit pressure value is 0.2Mpa. That is, when the pressure value of the pressure sensor 5 is stabilized in the set operation state, the pressure value monitored by the pressure sensor 5 is 0.2Mpa. The pressure of water saving is relatively compared with 0.2MPa while ensuring the use requirement and comfort level of users. The preset upper limit pressure value is 0.21Mpa.
For example, referring to fig. 2, in order to ensure the water pressure requirement of the top layer, the inlet pressure is 0.52mpa, and 1-11 layers of water are all over-pressurized, a pressure reducing valve 6 is arranged. By adopting the technical scheme of the embodiment, the water turbine generator 3 is arranged on the bypass pipeline 2, so that redundant pressure is eliminated and utilized. The water supply system can supply the water end through the original water supply pipeline or can supply the water end after passing through the hydroelectric generating device 3. For the existing building, the additional improvement can be carried out under the condition of not influencing water supply, and the overpressure pressure is fully utilized.
In one alternative embodiment, two first stop valves 7 are further arranged on the water supply pipeline 1 between the water inlet and the water outlet of the bypass pipeline 2; said relief valve 6 is located between two of said first shut-off valves 7; the water inlet of the bypass pipeline 2 and the water outlet of the bypass pipeline 2 are both provided with a second stop valve 8. When the system works, the first stop valve 7 of the bypass pipeline 2 is opened, the second stop valve 8 of the water supply pipeline 1 is closed, and water passes through the bypass pipeline 2, so that the power generation device can replace the function of the pressure reducing valve 6 and can generate power.
In this embodiment, the hydraulic generator 3 includes a hydraulic turbine 9 and a generator 10, the pressure sensor 5 can monitor the pressure at the position of the generator 10 in real time, and the electric energy generated by the generator 10 is used for charging a battery, lighting or is integrated into the utility grid. The high-pressure water supply of the water supply pipeline 1 passes through the bypass pipeline 2, firstly passes through the electric control valve 4, then drives the water turbine 9 to rotate, and the water turbine 9 is coupled with the generator 10 to generate electricity.
Further, the generated power of the generator 10 is calculated from the following output equation of the water turbine 9:
in the formula, N is the output (kW) of the water turbine; q is the flow (m/s) of the water turbine; h is the water head (m) of the water turbine; is the efficiency of the turbine.
The flow Q of the water turbine 9 is the water consumption requirement of the pipeline at the rear end of the water turbine 9, and the water head H of the water turbine 9 is the difference between the pressure before the water turbine 9 and the pressure after the water turbine 9, that is, the difference between the pipe network pressure and the water consumption requirement. Therefore, in the case of 2L/s of household water consumption, 30m of overpressure and 90% of efficiency of the water turbine 9 in the high-rise building, the calculated power generation is 0.53kW, and the lighting requirement of the household bulb can be basically maintained.
The type of the water turbine 9 and the generator 10 is as follows: the flow rate is the water flow rate at the maximum of the downstream maximum day. When the turbine 9 and the generator 10 in the first bypass pipe reach the maximum load, i.e. the maximum flow here, the opening of the second bypass pipe is controlled.
In one alternative embodiment, the pipeline pressure control and power generation system further comprises a power control panel 14, the power control panel 14 is in control connection with the generator 10 and is configured to control the purpose of generating power for accessing different power utilization scenarios 16, such as battery charging, lighting, incorporation into the power grid, etc.; the power control panel 14 is in signal transmission connection with the control system.
In one alternative embodiment, the bypass line of the present example has a plurality of bypass branches 13. Specifically, as shown in fig. 3, the bypass pipeline 2 has a common water inlet pipe 11, a common water outlet pipe 12 and a plurality of bypass branches 13, wherein the water inlet of the common water inlet pipe 11 is the water inlet of the bypass pipeline 2, and the water outlet of the common water outlet pipe 12 is the water outlet of the bypass pipeline 2; the bypass branches 13 are arranged in parallel between the water inlet pipe and the water outlet pipe, and each bypass branch 13 is provided with one water turbine generating device 3, one electric regulating valve 4 and one pressure sensor 5.
The embodiment also discloses a control method of the pipeline pressure control and power generation system with a plurality of bypass branches 13, comprising the following steps:
in an initial state, a first stop valve 7 on the water supply pipeline 1 is closed, a second stop valve 8 from a bypass pipe to the upper part is opened, a first electric regulating valve on a first bypass branch is opened, electric regulating valves on other bypass branches are closed, the first electric regulating valve on the first bypass branch is opened to meet the current downstream water consumption, and meanwhile, a first pressure sensor monitors the water pressure in the first bypass branch in real time, namely monitors the water pressure of a water end;
after water starts, when the first pressure sensor monitors that the pressure value on the first bypass branch is lower than a preset lower limit pressure value, the first pressure sensor transmits a signal lower than the preset lower limit pressure value to the control system; the control system controls the opening degree of the valve port of the first electric regulating valve to be increased, and controls the water pressure of the first bypass branch to reach the pressure required by the water end, so that the water pressure of the water end reaches a stable working state; if the downstream water consumption is reduced, controlling the valve port of the first electric regulating valve to be reduced to an initial state; wherein, the preset lower limit pressure value is 0.2Mpa, and can be set according to the pressure required by the water end.
As the downstream water consumption continues to increase, the control system controls the first electric regulating valve to continuously increase the opening degree of the valve port until the first electric regulating valve is completely opened;
when the first electric regulating valve is completely opened, the water pressure of the first bypass branch cannot be maintained in a stable working state, namely the water pressure cannot be maintained at the moment and is smaller than 0.2Mpa, the second electric regulating valve of the second bypass branch is opened, the water pressure of the second bypass branch is regulated to the stable working state by controlling the opening size of the valve port of the second electric regulating valve, and the water pressure in the common water outlet pipeline connected with the water outlet ends of the plurality of bypass branches is in the stable working state; if the downstream water consumption is reduced, the pressure of the sensor is increased to be more than 0.21MPa, and the valve port of the second electric regulating valve is firstly controlled to be reduced until the second electric regulating valve is completely closed; if the second electric regulating valve is completely closed, the sensor pressure is still larger than 0.21MPa, and the first electric regulating valve is continuously closed.
The downstream water consumption is continuously increased, the process is repeated, the electric regulating valve of the next bypass branch is sequentially opened, and the water pressure at the water consumption end is in a stable working state; then, the water consumption is reduced, and the electric regulating valve is closed in reverse order.
In the process that water flows through the bypass branch, the water turbine 9 is driven to rotate, meanwhile, the electric generator 10 is coupled to generate electric energy, and when the electric regulating valve is fully opened, the electric generator 10 is in a stable working state to continuously generate electric power.
In one alternative embodiment, the bypass pipeline module is formed by integrally arranging the hydroelectric power generation device 3, the electric control valve 4 and the pressure sensor 5 on the bypass pipeline 2. The modular structure facilitates installation and access to the water supply pipe 1. For extremely high overpressure, the maximum hydraulic power load exceeding the single-group bypass pipeline module cannot reduce the pressure to the use requirement, and the pressure regulation and power generation can be realized by connecting a plurality of modularized bypass pipelines 2 in series. Specifically, the number of the bypass pipes 2 is multiple, and multiple groups of bypass pipes 2 are sequentially connected to the water supply pipe 1. That is, the water inlet and the water outlet of each group of the bypass pipelines 2 are connected to the water supply pipeline 1, each group of the bypass pipelines 2 is correspondingly provided with a group of the first stop valve 7, a group of the second stop valve 8 and an electric control valve, the pressure sensor 5 monitors the water pressure of the downstream water end, each group of the bypass pipelines 2 can work independently, the working state of each bypass pipeline 2 can be controlled by the control system according to the pressure in the water supply pipeline 1 and the water pressure required by the water end, and when all the bypass pipelines 2 are in the working state, namely, the water turbine power generation devices of all the bypass pipelines 2 work, the system adjusts the water pressure capacity and the power generation capacity to be maximum. Further, each set of bypass duct 2 modules may contain a plurality of bypass branches 13.
Compared with the prior art, the pipeline pressure control and power generation system provided by the embodiment at least can realize one of the following beneficial effects:
(1) The pressure sensor is used for accurately monitoring and adjusting the pressure of the pipe network, and transmitting the pressure data in real time to help operators to carry out pipeline leakage control management, so that the life cycle of the pipeline can be prolonged.
(2) The invention combines the pressure control technology, the hydroelectric generation technology and the intelligent water supply monitoring system, converts the redundant pipe network pressure into clean hydropower through the miniature water turbine, and can be used for lighting, charging, merging into the municipal power grid and other purposes.
(3) According to the invention, a plurality of functional targets can be realized in parallel according to the actual pipeline arrangement condition, and the pressure of water when flowing through the return pipe of the equipment can be ensured to be accurately maintained at the pressure level required by the system.
(4) The invention accesses the water supply pipeline through the bypass, thereby reducing the influence of equipment installation on the operation of a pipeline system to the greatest extent.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application, and are not meant to limit the scope of the invention, but to limit the scope of the invention.

Claims (7)

1. A pipeline pressure control and power generation system, comprising:
a water supply pipe;
at least one bypass conduit having a water inlet and a water outlet, the water inlet and the water outlet being connected to the water supply conduit;
the hydraulic power generation device is arranged on each bypass pipeline, an electric regulating valve is arranged at the upstream of the hydraulic power generation device, and a pressure sensor is arranged at the downstream of the hydraulic power generation device;
the system also comprises a control system, wherein the control system is configured to independently control the valve opening degree of the electric regulating valve on each bypass pipeline based on the pressure data information monitored by the pressure sensor on each bypass pipeline, so that the pressure of the downstream water end is kept unchanged;
the control system is further configured to monitor the operating time T1 of the active hydro-generator devices, and if the operating time T1 of one of the hydro-generator devices is greater than a threshold value, dynamically starting any one of the off hydro-generator devices to replace the active hydro-generator device; the dynamic starting rule is that the closing time T2 of all the closed hydroelectric generating devices is judged, and the hydroelectric generating device with the longest closing time is started when the maximum closing time T2 is compared;
the control system is further configured to monitor the number N of the hydraulic power generation devices in operation preferentially, and if the number N of the hydraulic power generation devices in operation is smaller than the total number of the bypass pipelines, the working time T1 and the hydraulic power generation devices in dynamic startup and shutdown are judged again; if the working number N is equal to the number of the bypass pipelines, waiting whether a closing instruction exists or not based on the pressure data information of the pressure sensor, and preferentially closing the water-turbine power generation device with the maximum working time T1 when the closing instruction is generated;
when a plurality of bypass pipelines are arranged, the bypass pipelines which are started first by water are started in turn, the bypass pipeline with the number of N1 is started when the system uses water for the first time, the bypass pipeline with the number of N2 is started when the system automatically controls water for the second time, and so on.
2. The pipeline pressure control and power generation system according to claim 1, wherein a pressure reducing valve is arranged on the water supply pipeline;
the water inlet and the water outlet of the bypass pipeline are respectively positioned at the upstream and the downstream of the pressure reducing valve.
3. The pipeline pressure control and power generation system according to claim 2, wherein two first stop valves are further arranged on the water supply pipeline between the water inlet and the water outlet of the bypass pipeline, and the pressure reducing valve is positioned between the two first stop valves;
the water inlet of the bypass pipeline and the water outlet of the bypass pipeline are both provided with second stop valves.
4. The pipeline pressure control and power generation system of claim 1, further comprising a power control panel in control connection with the generator of the hydro-generator device configured to control the use of generated power for accessing different power usage scenarios;
the power control panel is in signal transmission connection with the control system.
5. The pipeline pressure control and power generation system according to claim 4, wherein the bypass pipeline has a common water inlet pipe, a common water outlet pipe and a plurality of bypass branches, the plurality of bypass branches are arranged in parallel between the water inlet pipe and the water outlet pipe, and each bypass branch is provided with a water turbine power generation device, an electric control valve and a pressure sensor.
6. The pipeline pressure control and power generation system of claim 5, wherein the number of bypass pipelines is plural, and the plurality of bypass pipelines are sequentially connected to the water supply pipeline.
7. A control method of the pipeline pressure control and power generation system according to claim 6, comprising the steps of:
in an initial state, a first electric regulating valve on the first bypass branch is opened, electric regulating valves on other bypass branches are closed, the current downstream water consumption can be met at the moment, and meanwhile, a first pressure sensor on the first bypass branch monitors the water pressure in the first bypass branch in real time;
after water starts, when the first pressure sensor monitors that the pressure value on the first bypass branch is lower than a preset lower limit pressure value, the first pressure sensor transmits a signal lower than the preset lower limit pressure value to a control system, and the control system controls the opening degree of a valve port of the first electric regulating valve to be gradually increased until the water pressure at a water outlet of the first bypass branch is controlled to be in a stable working state; if the downstream water consumption is reduced, the pressure monitored by the first pressure sensor is increased, the first pressure sensor transmits a signal of the pressure increase to the control system, and the valve port of the first electric regulating valve is controlled to be reduced to an initial state;
as the downstream water consumption continues to increase, the control system controls the first electric regulating valve to continuously increase the opening degree of the valve port until the first electric regulating valve is completely opened;
when the first electric regulating valve is completely opened, and the pressure value monitored by the first pressure sensor is lower than a preset lower limit pressure value, the water pressure of the first bypass branch cannot be maintained in a stable working state, the second electric regulating valve of the second bypass branch is opened, and the water pressure of the second bypass branch is regulated to the stable working state by controlling the opening size of the valve port of the second electric regulating valve; if the downstream water consumption is reduced, the pressure monitored by the second pressure sensor of the second bypass branch is increased, the second pressure sensor transmits a signal of the pressure increase to the control system, and the control system controls the valve port of the second electric regulating valve to be reduced until the valve port is completely closed;
the downstream water consumption is continuously increased, the process is repeated, and the electric regulating valve of the next bypass branch is sequentially opened, so that the water pressure of the downstream water consumption end is in a stable working state;
in the process that water flows through the bypass branch, the water turbine is driven to rotate, and meanwhile, the generator is coupled to generate electric energy;
the control system independently controls the valve opening degree of the electric regulating valve on each bypass pipeline based on the pressure data information monitored by the pressure sensor on each bypass pipeline, so that the pressure of the downstream water end is kept unchanged;
the control system monitors the working time T1 of the hydraulic power generation devices in operation, and if the working time T1 of one hydraulic power generation device is larger than a threshold value, any closed hydraulic power generation device is dynamically started to replace the hydraulic power generation device in operation; the dynamic starting rule is that the closing time T2 of all the closed hydroelectric generating devices is judged, and the hydroelectric generating device with the longest closing time is started when the maximum closing time T2 is compared;
the control system monitors the number N of the hydraulic power generation devices in operation preferentially, and if the number N of the hydraulic power generation devices in operation is smaller than the total number of the bypass pipelines, the control system judges the working time T1 and dynamically starts the hydraulic power generation devices in closing; and if the working number N is equal to the number of the bypass pipelines, waiting for whether a closing instruction exists based on the pressure data information of the pressure sensor, and preferentially closing the hydroelectric generating device with the maximum working time T1 when the closing instruction is generated.
CN202310668873.9A 2023-06-07 2023-06-07 Pipeline pressure control and power generation system and control method thereof Active CN116447066B (en)

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