CN107894019B - Heating system for reducing return water temperature of primary network and control method - Google Patents
Heating system for reducing return water temperature of primary network and control method Download PDFInfo
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- CN107894019B CN107894019B CN201810000812.4A CN201810000812A CN107894019B CN 107894019 B CN107894019 B CN 107894019B CN 201810000812 A CN201810000812 A CN 201810000812A CN 107894019 B CN107894019 B CN 107894019B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
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Abstract
The invention relates to a circulating pressurization system which is formed by connecting a water return pipeline of a primary network relay pump station, a water supply pipeline of the primary network relay pump station and a relay pump. The whole water supply and return pipeline is also provided with a ball valve, a flowmeter and a butterfly valve for cutting off the pipeline. The first-level network water supply system is also connected with the first-level network water supply pipeline; the other port of the secondary network backwater secondary pipe is also connected with a low-temperature operation water mixing pipeline. According to the invention, the high-pressure circulating pump or the low-pressure circulating pump can be started or stopped according to the starting or stopping of the relay pump, meanwhile, the butterfly valve A and the butterfly valve B are opened and closed according to different pressures, the system can realize quality adjustment of different temperatures for normal heating states and low-temperature running states, and the return water temperature is effectively utilized.
Description
Technical Field
The invention belongs to the technical field of heat supply system energy conservation, and relates to a heat supply system for reducing the return water temperature of a primary network and a control method.
Background
The power consumption of the circulating water pump of the central heating system is directly related to the temperature difference of the water supply and return of the primary network, so that the temperature difference of the water supply and return of the primary network is increased, the hot water conveying capacity of a heating pipe network is effectively improved, and the power consumption of the circulating water pump is reduced. The water supply temperature of the primary network depends on the highest temperature resistance of the pipeline, and the temperature of the primary network is difficult to be increased due to factors such as design and construction. Therefore, the reduction of the return water temperature of the primary network is a more suitable way. The existing technology for reducing the return water temperature of the primary network is an absorption heat exchange technology, but the technology needs to add an absorption unit, so that the construction cost of a heat exchange station is greatly increased. The water mixing heat exchange technology can also reduce the water return temperature of the primary net, but can only reduce the water return temperature of the primary net to be the same as the water return temperature of the secondary net. The heat supply system for reducing the return water temperature of the primary network achieves the purpose of reducing the return water temperature of the primary network by supplying heat to users of the secondary network by utilizing the return water of the primary network on the premise of not increasing equipment.
Disclosure of Invention
The invention provides a heating system for reducing the return water temperature of a primary network and a control method thereof, which aim to overcome the defect of high return water temperature and resource waste of the primary network in a mesh heating system.
The specific technical scheme of the invention is as follows:
the heat supply system for reducing the return water temperature of the primary network comprises a circulating pressurization system which is formed by connecting a return water pipeline of a primary network relay pump station, a water supply pipeline of the primary network relay pump station and a relay pump, wherein the return water pipeline of the primary network relay pump station is connected with a primary secondary network water supply pipe, the primary secondary network water supply pipe is connected with a low-pressure circulating water pump, the low-pressure circulating water pump is connected with a secondary network water supply secondary pipe, the secondary network water supply secondary pipe is connected with a hot user through a secondary network water supply station external pipeline, the hot user is connected with a secondary network water return station external pipeline for return water, the secondary network water return station external pipeline is connected with a secondary network water return pipe, and the secondary network water return pipe is connected with the primary network relay pump station water supply pipeline; an electric ball valve is arranged on a pipeline, connected with the low-pressure circulating water pump, of the first water supply pipe of the secondary network, a flowmeter is connected behind the electric ball valve, and a ball valve A is connected behind the flowmeter; a ball valve A is arranged on the secondary network water supply two pipes; a ball valve A is arranged on a pipeline connected with a water supply pipeline of the primary network relay pump station, an electric ball valve and a flowmeter are connected behind the ball valve A, and a butterfly valve B is connected behind the flowmeter; the first water supply pipe of the second-level network and the low-pressure circulating water pump are also connected with a first-level network high-temperature water supply system; the outer pipeline of the secondary network backwater station is also connected with a secondary network backwater secondary pipe, and the other end of the secondary network backwater secondary pipe is connected with a pipeline communicated with the water supply pipeline of the primary network relay pump station; the other end of the secondary network backwater secondary pipe is also connected with a low-temperature operation water mixing pipe, and the other end of the low-temperature operation water mixing pipe is connected with an outer pipe of a secondary network water supply station.
The first-level network high-temperature water supply system comprises a high-temperature water conveying pipeline, a first-level network water supply horizontal type dirt remover is arranged on the high-temperature water conveying pipeline, a primary water supply flowmeter is connected behind the first-level network water supply horizontal type dirt remover, and an electric regulating valve is also connected behind the primary water supply flowmeter.
The access point of the high-temperature water conveying pipeline and the first pipe of the second-level network water supply is arranged between the flowmeter and the ball valve A on the first pipe of the second-level network water supply.
The secondary network backwater two pipes are connected with a high-pressure circulating water pump, and ball valves B are respectively arranged at the front end and the rear end of the high-pressure circulating water pump.
An electric regulating butterfly valve is arranged on a pipeline connected with the other end of the low-temperature running water mixing pipe and the outer pipeline of the secondary network water supply station, and a ball valve B is arranged on the electric regulating butterfly valve.
The ball valve A and the ball valve B can adopt flange ball valves, welded ball valves, threaded connection ball valves and bayonet ball valves.
The beneficial effects of the invention are as follows:
1. the first-stage network water supply pipe and the low-pressure circulating water pump are also connected with a first-stage network high-temperature water supply system; the access point of the high-temperature water conveying pipeline and the first pipe of the second-level network water supply is arranged between the flowmeter and the ball valve on the first pipe of the second-level network water supply. The first-level network high-temperature water supply system comprises a high-temperature water conveying pipeline, a first-level network water supply horizontal type dirt remover is arranged on equipment on the high-temperature water conveying pipeline, a first-level network water supply flowmeter is connected behind the first-level network water supply horizontal type dirt remover, an electric regulating valve is further connected behind the first-level network water supply flowmeter, the electric regulating valve is used for supplementing high-temperature first-level network water supply when the first-level network relay backwater temperature cannot meet heating requirements, and the setting of the system can be used for regulating the temperature when the first-level network backwater temperature cannot meet the second-level network heating temperature.
2. The outer pipeline of the secondary network backwater station is also connected with a secondary network backwater second pipe, and the other end of the secondary network backwater second pipe is connected with a pipeline communicated with the water supply pipeline of the primary network relay pump station. The secondary network backwater two pipes 20 are connected with a high-pressure circulating water pump, and ball valves B4 are respectively arranged at the front end and the rear end of the high-pressure circulating water pump. The system can meet the requirements of normal temperature heating and heating in low-temperature operation of the secondary network under the condition of high pressure.
3. The other end of the secondary network backwater secondary pipe is also connected with a low-temperature operation water mixing pipe, the other end of the low-temperature operation water mixing pipe is connected with an outer pipe of a secondary network water supply station, an electric regulating butterfly valve is arranged on the connected pipe, and is responsible for providing low-temperature water for a system in low-temperature operation, and a ball valve B is arranged on the electric regulating butterfly valve. The temperature regulation under the condition that the temperature of the return water of the primary network is reduced by using the return water temperature of the secondary network when the return water temperature of the primary network is higher than the heating temperature of the secondary network can be met.
4. The secondary network is provided with the flowmeter and the electric ball valve, the flowmeter is responsible for detecting flow and is used for verifying whether the secondary network system loses water, and when the secondary network system loses water, the electric ball valve 5 is quickly closed, so that the safety of the primary network system and a heat supply first station is ensured when the secondary network system loses water.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: the system comprises a low-pressure circulating water pump, a2 ball valve A, a 3 high-pressure circulating water pump, a 4 ball valve B, a 5 electric ball valve, a 6 secondary network horizontal type dirt remover, a 7 flowmeter, a 8 electric regulating valve, a 9 primary water supply flowmeter, a 10 primary network water supply horizontal type dirt remover, a 11 relay backwater horizontal type dirt remover, a 12 relay pump, a13 butterfly valve A, a14 butterfly valve B, a 15 electric regulating butterfly valve, a 16 heat user, a 17 secondary network water supply station outer pipeline, a 18 secondary network backwater station outer pipeline, a 19 secondary network water supply secondary pipe, a 20 secondary network backwater secondary pipe, a 21 secondary network backwater primary pipe, a 22 low-temperature operation water mixing pipe, a 23 secondary network water supply primary pipe, a 24 primary network relay pump station backwater pipeline and a 25 primary network relay pump station water supply pipeline.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and examples:
as shown in FIG. 1, a heating system for reducing return water temperature of a primary network and a control method thereof are provided, the control system mainly comprises a circulating pressurization system formed by connecting a return water pipeline 24 of a relay pump station of the primary network, a water supply pipeline 25 of the relay pump station of the primary network and a relay pump 12, two sides of the relay pump 12 are respectively provided with a butterfly valve, and a relay return water horizontal type dirt remover 11 is arranged between the return water pipeline 24 of the relay pump station of the primary network and the relay pump 12. The pipeline of the return water pipeline 24 of the relay pump station of the primary network is connected with the first pipeline 23 of the water supply of the secondary network, the first pipeline 23 of the water supply of the secondary network is connected with the low-pressure circulating water pump 1, the low-pressure circulating water pump 1 is connected with the second pipeline 19 of the water supply of the secondary network, the second pipeline 19 of the water supply of the secondary network is connected with the heat user 16 through the pipeline 17 outside the water supply station of the secondary network, the heat user 16 is connected with the pipeline 18 outside the water return station of the secondary network for water return, the pipeline 18 outside the water return station of the secondary network is connected with the first pipeline 21 of the water return of the secondary network, and the first pipeline 21 of the water return of the secondary network is connected with the pipeline 25 of the relay pump station of the primary network; the utility model discloses a sewage treatment system, including two-stage net water supply pipe 23, low pressure circulating water pump 1, be provided with electric ball valve 5 on the pipeline that two-stage net water supply pipe 23 is connected with, electric ball valve 5 is connected with two-stage net horizontal dirt remover 6, be connected with flowmeter 7 behind the two-stage net horizontal dirt remover 6, install the flowmeter 7 on the diode net and be responsible for the detection of flow for verify whether two-stage net system loses water, when losing water, electric ball valve 5 will be closed fast, in order to guarantee the safety of one-level net system and heat supply first stop when losing water. A ball valve A2 is connected behind the flowmeter 7; the second-level network water supply pipe 19 is provided with a ball valve A2; the pipeline that second grade net return water one pipe 21 is connected with first grade net relay pump station water supply pipe 25 is provided with ball valve A2, be connected with electronic ball valve 5 and flowmeter 7 behind the ball valve A2, be connected with butterfly valve B14 behind the flowmeter 7.
The primary-net water supply pipe 23 and the low-pressure circulating water pump 1 are also connected with a primary-net high-temperature water supply system; the access point of the high-temperature water conveying pipeline and the first secondary network water supply pipe 23 is arranged between the flowmeter 7 and the ball valve A2 on the first secondary network water supply pipe 23 pipeline. The primary network high-temperature water supply system comprises a high-temperature water conveying pipeline, a primary network water supply horizontal type dirt remover 10 is arranged on equipment on the high-temperature water conveying pipeline, a primary water supply flowmeter 9 is connected after the primary network water supply horizontal type dirt remover 10, an electric regulating valve 8 is further connected after the primary water supply flowmeter 9, and the electric regulating valve 8 is used for supplementing high-temperature primary network water supply when the primary network relay backwater temperature cannot meet heating requirements.
The secondary network backwater station outer pipeline 18 is also connected with a secondary network backwater secondary pipe 20, and the other end of the secondary network backwater secondary pipe 20 is connected with a pipeline communicated with a water supply pipeline 25 of the primary network relay pump station. The secondary network backwater two pipes 20 are connected with a high-pressure circulating water pump 3, and ball valves B4 are respectively arranged at the front end and the rear end of the high-pressure circulating water pump 3.
The other port of the second-level network backwater second pipe 20 is also connected with a low-temperature operation water mixing pipe 22, the other end of the low-temperature operation water mixing pipe 22 is connected with a second-level network water supply station outer pipeline 17, an electric regulating butterfly valve 15 is arranged on the connected pipeline, the electric regulating butterfly valve 15 is responsible for providing low-temperature water for the system during low-temperature operation, and a ball valve B4 is arranged.
The ball valve A2 and the ball valve B4 installed in the system can be flange ball valves, welded ball valves, threaded connection ball valves, bayonet ball valves and the like.
In the system, according to the start or stop of the relay pump 12, the system pressure is different, the high-pressure circulating pump 3 or the low-pressure circulating pump 1 is required to be started, and meanwhile, the butterfly valve A13 and the butterfly valve B14 are switched according to different pressures and different circulating water pumps. The system can realize quality adjustment of different temperatures under the normal heating state and the low-temperature running state. According to different pressure requirements, when the relay pump 12 is started, three ball valves B4 in the system are in a closed state, three ball valves A2 are in an open state, a butterfly valve A13 is opened, a butterfly valve B14 is closed, and the low-pressure circulating water pump 1 is started. When the relay pump is closed, the three ball valves B4 are in an open state, the three ball valves A2 are in a closed state, the butterfly valve A13 is closed, the butterfly valve B14 is opened, and the high-pressure circulating water pump 3 is opened. The following are specific embodiments of the present system:
example 1
When the relay pump 12 is started, the temperature of the first-level network relay backwater can meet the heat supply requirement of the second-level network, and when the heat supply is directly carried out, the control method is as follows: the relay pump 12 is started, three ball valves B4 in the system are in a closed state, three ball valves A2 are in an open state, a butterfly valve A13 is opened, a butterfly valve B14 is closed, an electric regulating butterfly valve 15 is closed, and an electric regulating valve 8 is closed. At this time, the water return pipeline 24 of the relay pump station of the primary network enters and exits the secondary network horizontal type dirt remover 6 through the primary water supply pipe 23 of the secondary network through the electric ball valve 5 at the front end of the relay water return horizontal type dirt remover 11, then enters the low-pressure circulating pump 1 through the flowmeter 7 and the ball valve A2 in the opening state to be pressurized, and the pressurized water enters the secondary water supply pipe 19 of the secondary network to pass through the ball valve A2 in the opening state, then enters the user 16 to supply heat after passing through the outer pipeline 17 of the secondary water supply station of the secondary network. The low-temperature water after the heat is dissipated to the user 16 returns to the heat exchange station through the secondary network backwater station outer pipeline 18, passes through the secondary network backwater first pipe 21 and the open-state ball valve A2, then enters the electric ball valve 5 and the flow meter 7 responsible for diagnosing the water loss, returns to the relay backwater horizontal type dirt remover 11 on the primary network relay pump station backwater pipeline 24 through the open butterfly valve A13, and enters the primary network relay pump station water supply pipeline 25 after being pressurized by the relay pump 12, so that the circulation is completed.
Example 2
When the relay pump 12 is started, the temperature of the relay backwater of the primary network cannot meet the heat supply requirement of the secondary network, and when the primary network is required to supply water and mix water for heat supply, the control method is as follows: the relay pump 12 is opened, the three ball valves B4 are in a closed state, the three ball valves A2 are in an opened state, the butterfly valve A13 is opened, the butterfly valve B14 is closed, the electric regulating butterfly valve 15 is closed, the electric regulating valve 8 is opened, and the primary network water supply flow regulating function is achieved. At this time, the return water pipeline 24 of the primary network relay pump station enters and exits the secondary network horizontal type dirt remover 6 through the primary network water supply pipe 23 at the front end of the relay return water horizontal type dirt remover 11 and passes through the electric ball valve 5, then passes through the flowmeter 7, the primary network high-temperature water provided by the primary network water supply is mixed with the water of the secondary network water supply pipe 23 after the flowmeter 7 after being regulated to a proper flow rate through the electric regulating valve 8 by the primary network water supply dirt remover 10 and the flowmeter 9, then the ball valve A2 which jointly enters an open state enters the circulating pump 1 to pressurize, the pressurized water enters the secondary network water supply pipe 19 and passes through the open state ball valve A2, and then enters the user 16 to supply heat for the user after passing through the secondary network water supply station outer pipeline 17. The low-temperature water after the heat is dissipated to the user 16 returns to the heat exchange station through the secondary network backwater station outer pipeline 18, passes through the secondary network backwater first pipe 21 and the open-state ball valve A2, then enters the electric ball valve 5 and the flow meter 7 responsible for diagnosing water loss, returns to the rear end of the relay backwater horizontal type dirt remover 11 on the primary network relay pump station backwater pipeline 24 through the open butterfly valve A13, and enters the primary network relay pump station water supply 25 after being pressurized by the relay pump 12 to complete the circulation.
Example 3
When the relay pump 12 is started, the relay backwater temperature of the primary network exceeds the low-temperature operation heat supply requirement of the secondary network, and when the secondary network is in a state of mixing water and supplying heat, the control method comprises the following steps: the relay pump 12 is opened, the three ball valves B4 are in a closed state, the three ball valves A2 are in an opened state, the butterfly valve A13 is opened, the butterfly valve A14 is closed, the electric regulating valve 8 is closed, and the electric regulating butterfly valve 15 is opened, so that the low-temperature running mixed water flow regulating effect is achieved. At this time, the return water pipeline 24 of the primary network relay pump station enters the circulating pump 1 for pressurization through the electric ball valve 5 at the front end of the relay return water horizontal type dirt remover 11, passes through the electric ball valve 5 to enter and exit the secondary network horizontal type dirt remover 6 through the first pipe 23 of the secondary network water supply, then passes through the flowmeter 7, and enters the user 16 for heat supply after the secondary network return water is adjusted to a proper flow through the electric regulating butterfly valve 15 on the low-temperature operation water mixing pipe 22, and enters the circulating pump 1 for pressurization through the ball valve A2 in an open state after the pressurized water enters the secondary network water supply second pipe 19 and passes through the ball valve A2 in an open state, and finally enters the user 16 for heat supply through the secondary network water supply station outer pipe 17. The low-temperature water after the heat is dissipated to the user 16 returns to the heat exchange station through the secondary network backwater station outer pipeline 18, passes through the secondary network backwater first pipe 21 and the open-state ball valve A2, then enters the electric ball valve 5 and the flow meter 7 responsible for diagnosing water loss, returns to the relay backwater horizontal type pollutant remover 11 on the primary network relay pump station backwater pipeline 24 through the open butterfly valve A13, and enters the primary network relay pump station water supply 25 after being pressurized by the relay pump 12, so that the circulation is completed.
Example 4
When the relay pump 12 is closed, the heat supply requirement of the secondary network can be met by the relay backwater temperature of the primary network, when the heat supply is directly carried out, the butterfly valves on the two sides of the relay pump 12 are closed, the three welding ball valves A2 are in the closed state, the three ball valves B4 are in the open state, the butterfly valve B14 is opened, the butterfly valve A13 is closed, the electric regulating butterfly valve 15 is closed, and the electric regulating valve 8 is closed. At this time, the return water pipeline 24 of the first-level network relay pump station enters the second-level network horizontal type dirt remover 6 through the first pipe 23 of the second-level network water supply through the electric ball valve 5, then enters the second-level network water supply station through the flow meter 7 and the ball valve B4 in the open state, then enters the user 16 to supply heat to the user 16 after passing through the outer pipeline 17 of the second-level network water supply station, the low-temperature water after the heat is diffused to the user 16 returns to the heat exchange station through the outer pipeline 18 of the second-level network water return station, enters the circulating pump 3 through the second-level network water return pipe 20 to be pressurized and then enters the ball valve B4 in the open state, the pressurized water enters the second-level network water return after entering the electric ball valve 5 and the flow meter 7 responsible for diagnosing water loss, and enters the relay pump 12 on the first-level network relay pump station water return pipeline 24 through the back end of the relay pump 12 in the open butterfly valve B14 to complete the circulation.
Example 5
When the relay pump 12 is closed, the heat supply requirement of the secondary network cannot be met by the relay backwater temperature of the primary network, when the water and the water are mixed and supplied to the primary network for heat supply, butterfly valves on two sides of the relay pump 12 are closed, three welding ball valves A2 are in a closed state, three ball valves B4 are in an open state, a butterfly valve B14 is opened, and a butterfly valve A13 is closed. The electric regulating butterfly valve 15 is closed, and the electric regulating valve 8 plays a role in regulating the water supply flow of the primary network. The specific control method comprises the following steps: the front end of the primary network relay pump station water return pipeline 24 passes through the primary secondary network water supply pipeline 23, enters and exits the secondary network horizontal type sewage remover 6 through the electric ball valve 5, then passes through the flowmeter 7, the primary network high-temperature water of the primary network water supply pipeline passes through the primary network water supply sewage remover 10 and the flowmeter 9, the primary network high-temperature water is mixed with the water of the secondary network water supply pipeline 23 at the rear side of the flowmeter 7 after being regulated to a proper flow rate through the electric regulating valve 8, then enters the ball valve B4 in an open state together, then enters the user 16 to supply heat after passing through the secondary network water supply station outer pipeline 17, the low-temperature water after heat dissipation to the user 16 returns to the heat exchange station through the secondary network water return station outer pipeline 18, enters the circulating pump 3 through the secondary network water return pipeline 20 to be pressurized and then enters the ball valve B4 in the open state, the pressurized water enters the electric ball valve 5 and the flowmeter 7 responsible for diagnosing water loss, and the pressurized water returns to the rear end of the relay pump 12 on the primary network pump station relay water return pipeline 24 through the open butterfly valve B14 to complete the circulation of the primary network relay pump station water supply 25.
Example 6
When the relay pump 12 is closed, the relay backwater temperature of the primary network exceeds the low-temperature operation heat supply requirement of the secondary network, and the secondary network is required to supply mixed water for heat supply, the control method is as follows: the butterfly valves on the two sides of the relay pump 12 are closed, the three welding ball valves A2 are in a closed state, the three ball valves B4 are in an open state, the butterfly valve B14 is opened, the butterfly valve A13 is closed, the electric regulating valve 8 is closed, and the electric regulating butterfly valve 15 plays a role in regulating the flow of mixed water in low-temperature operation. The front end of the first-level network relay pump station water return pipeline 24 passes through a first secondary network water supply pipe 23, enters and exits the second-level network horizontal type sewage remover 6 through an electric ball valve 5, then passes through a flowmeter 7, and enters an electric regulating ball valve on a low-temperature operation water mixing pipe 22 to be regulated to a proper flow, then a ball valve B4 entering an open state enters and then enters a user 16 to supply heat to the user 16 after passing through a second-level network water supply station outer pipeline 17, low-temperature water after heat is emitted to the user 16 returns to a heat exchange station through a second-level network water return station outer pipeline 18, enters a circulating pump 3 through a second-level network water return pipe 20 to be pressurized and then enters the ball valve B4 in the open state, a part of pressurized water enters the second-level network water return then enters the electric ball valve 5 and a flowmeter 7 responsible for diagnosis, and returns to the rear end of the relay pump 12 on the first-level network relay pump station water return pipeline 24 through the open butterfly valve B14 to complete the circulation.
Claims (6)
1. The utility model provides a reduce heating system of first order net return water temperature, includes that first order net relay pump station return water (24) pipeline, first order net relay pump station supply pipe (25) and relay pump (12) are connected the circulation booster system who constitutes, its characterized in that: the primary network relay pump station water return (24) pipeline is connected with a primary secondary network water supply pipe (23), the primary secondary network water supply pipe (23) is connected with a low-pressure circulating water pump (1), the low-pressure circulating water pump (1) is connected with a secondary network water supply secondary pipe (19), the secondary network water supply secondary pipe (19) is connected with a heat user (16) through a secondary network water supply station outer pipeline (17), the heat user (16) is connected with a secondary network water return station outer pipeline (18) for water return, the secondary network water return station outer pipeline (18) is connected with a secondary network water return primary pipe (21), and the secondary network water return primary pipe (21) is connected with a primary network relay pump station water supply pipeline (25); an electric ball valve (5) is arranged on a pipeline, connected with the low-pressure circulating water pump (1), of the first water supply pipe (23) of the secondary network, a flowmeter (7) is connected behind the electric ball valve (5), and a ball valve A (2) is connected behind the flowmeter (7); a ball valve A (2) is arranged on the secondary network water supply secondary pipe (19); a ball valve A (2) is arranged on a pipeline, which is connected with a water supply pipeline (25) of the primary network relay pump station, of the secondary network backwater first pipe (21), an electric ball valve (5) and a flowmeter (7) are connected behind the ball valve A (2), and a butterfly valve B (14) is connected behind the flowmeter (7); the primary-level network water supply system is also connected with the primary-level network water supply pipe (23) and the low-pressure circulating water pump (1); the secondary network backwater station outer pipeline (18) is also connected with a secondary network backwater secondary pipe (20), and the other end of the secondary network backwater secondary pipe (20) is connected with a pipeline communicated with a water supply pipeline (25) of the primary network relay pump station; the other port of the secondary network backwater secondary pipe (20) is also connected with a low-temperature operation water mixing pipe (22), and the other end of the low-temperature operation water mixing pipe (22) is connected with a secondary network water supply station external pipeline (17);
the primary-net high-temperature water supply system comprises a high-temperature water conveying pipeline, a primary-net water supply horizontal type dirt remover (10) is arranged on the upper equipment of the high-temperature water conveying pipeline, a primary water supply flowmeter (9) is connected behind the primary-net water supply horizontal type dirt remover (10), and an electric regulating valve (8) is also connected behind the primary water supply flowmeter (9);
the secondary network backwater secondary pipe (20) is connected with a high-pressure circulating water pump (3), and ball valves B (4) are respectively arranged at the front end and the rear end of the high-pressure circulating water pump (3);
an electric regulating butterfly valve (15) is arranged on a pipeline connected with an external pipeline (17) of the secondary network water supply station at the other end of the low-temperature running water mixing pipe (22), and a ball valve B (4) is arranged on the pipeline;
a relay backwater horizontal type dirt remover (11) is arranged between the water return pipeline (24) of the primary network relay pump station and the relay pump (12), one end of a butterfly valve A (13) is connected with the middle of the relay backwater horizontal type dirt remover (11) and the relay pump (12), and the other end of the butterfly valve A is connected with the middle of the flow meter (7) and the butterfly valve B (14) on the water supply pipeline (25) of the primary network relay pump station;
when the relay pump (12) is started, the system is in a low pressure state, three ball valves B (4) in the system are in a closed state, three ball valves A (2) are in an open state, a butterfly valve A (13) is opened, a butterfly valve B (14) is closed, and the low-pressure circulating water pump (1) is opened; when the temperature of the primary network relay backwater can meet the heat supply requirement of the secondary network and the heat supply is directly carried out, the relay pump (12) is started, three ball valves B (4) in the system are in a closed state, three ball valves A (2) are in an open state, a butterfly valve A (13) is opened, a butterfly valve B (14) is closed, an electric regulating butterfly valve (15) is closed, and an electric regulating valve (8) is closed; at the moment, a water return pipeline (24) of a relay pump station of a primary network enters a secondary network horizontal type dirt remover (6) through a secondary network water supply first pipe (23) at the front end of the relay water return horizontal type dirt remover (11) and enters the secondary network horizontal type dirt remover through an electric ball valve (5), then enters a low-pressure circulating pump (1) through a flowmeter (7) and a ball valve A (2) in an open state to be pressurized, and the pressurized water enters the secondary network water supply second pipe (19) through the ball valve A (2) in the open state and then enters a user (16) to supply heat for the user through a secondary network water supply station external pipeline (17); the low-temperature water after the heat is dissipated to the user (16) returns to the heat exchange station through a secondary network water return station outer pipeline (18), passes through a secondary network water return first pipe (21) and an open-state ball valve A (2), then enters an electric ball valve (5) and a flow meter (7) responsible for diagnosing water loss, returns to a relay water return horizontal type dirt remover (11) on a primary network relay pump station water return pipeline (24) through an open butterfly valve A (13), and enters a primary network relay pump station water supply pipeline (25) after being pressurized by a relay pump (12) to complete the circulation.
2. The heating system for reducing primary network backwater temperature of claim 1, wherein: the access point of the high-temperature water conveying pipeline and the first secondary network water supply pipe (23) is arranged between the flowmeter (7) and the ball valve A (2) on the first secondary network water supply pipe (23).
3. The heating system for reducing primary network backwater temperature of claim 1, wherein: the ball valve A and the ball valve B can adopt flange ball valves, welded ball valves, threaded connection ball valves and bayonet ball valves.
4. The heating system for reducing primary network backwater temperature of claim 1, wherein: when the return water temperature of the primary network cannot meet the heat supply requirement of the secondary network, one of the return water temperatures of the primary network relay cannot meet the heat supply requirement of the secondary network, and the other return water temperature of the primary network relay exceeds the low-temperature operation heat supply requirement of the secondary network; when the relay backwater temperature of the primary network cannot meet the heat supply requirement of the secondary network, the electric regulating butterfly valve (15) is closed, and the electric regulating valve (8) is opened, so that the water supply flow regulating function of the primary network is realized; the front end of a primary network relay pump station return water pipeline (24) passes through a secondary network water supply first pipe (23) at the front end of a relay return water horizontal type dirt remover (11) and enters and exits the secondary network horizontal type dirt remover (6) through an electric ball valve (5), then the primary network water supply provided by primary network water supply passes through a primary network water supply dirt remover (10) and a flowmeter (9), the primary network water supply dirt remover and the flowmeter (9) are mixed with water of the secondary network water supply first pipe (23) after the flowmeter (7) after being regulated to proper flow through an electric regulating valve (8), then the ball valve A (2) which jointly enters an opening state enters into a circulating pump (1) to be pressurized, the pressurized water enters the ball valve A (2) of the secondary network water supply second pipe (19) which enters the opening state after passing through a secondary network water supply station outer pipe (17) and then enters a user (16) to supply heat; the low-temperature water with heat emitted to a user (16) returns to a heat exchange station through a secondary network water return station external pipeline (18), enters an electric ball valve (5) and a flow meter (7) responsible for diagnosing water loss after passing through a secondary network water return first pipe (21) and an open ball valve A (2), returns to the rear end of a relay water return horizontal type pollutant remover (11) on a primary network relay pump station water return pipeline (24) after passing through an open butterfly valve A (13), and enters a primary network relay pump station water supply (25) after being pressurized by a relay pump (12) to complete the circulation; when the relay backwater temperature of the primary network exceeds the low-temperature operation heat supply requirement of the secondary network, the electric regulating valve (8) is closed, and the electric regulating butterfly valve (15) is opened; the front end of a first-level network relay pump station return water pipeline (24) is provided with a first-level network water supply pipe (23) at the front end of a relay return water horizontal type dirt remover (11) through an electric ball valve (5), the first-level network water enters and exits the second-level network horizontal type dirt remover (6), then the second-level network return water enters and exits through a flowmeter (7), the second-level network return water enters a circulating pump (1) to be pressurized through a ball valve A (2) which enters an open state after being regulated to a proper flow through an electric regulating butterfly valve (15) on a low-temperature operation water mixing pipe (22), and the pressurized water enters a ball valve A (2) which enters a second-level network water supply pipe (19) to enter a user (16) to supply heat after passing through an outer pipeline (17) of the second-level network water supply station; the low-temperature water after the heat is dissipated to the user (16) returns to the heat exchange station through a secondary network water return station outer pipeline (18), passes through a secondary network water return first pipe (21) and an open-state ball valve A (2), then enters an electric ball valve (5) and a flow meter (7) responsible for diagnosing water loss, returns to a relay water return horizontal type dirt remover (11) on a primary network relay pump station water return pipeline (24) through an open butterfly valve A (13), and enters a primary network relay pump station water supply (25) after being pressurized by a relay pump (12) to complete the circulation.
5. A heating system for reducing primary network return water temperature as claimed in any one of claims 1 or 4 wherein: when the relay pump (12) is closed, the system is in a high pressure state, the three ball valves B (4) are in an open state, the three ball valves A (2) are in a closed state, the butterfly valve A (13) is closed, the butterfly valve B (14) is opened, and the high-pressure circulating water pump (3) is opened; when the temperature of the primary network relay backwater can meet the heat supply requirement of the secondary network and the heat supply is directly carried out, butterfly valves on two sides of a relay pump (12) are closed, three welding ball valves A (2) are in a closed state, three ball valves B (4) are in an open state, a butterfly valve B (14) is opened, a butterfly valve A (13) is closed, an electric regulating butterfly valve (15) is closed, and an electric regulating valve (8) is closed; at this time, the front end of the primary network relay pump station water return pipeline (24) passes through the secondary network water supply first pipe (23) and enters and exits the secondary network horizontal type dirt remover (6) through the electric ball valve (5), then enters and exits the secondary network water supply station outer pipeline (17) through the flowmeter (7) and the open-state ball valve B (4) and then enters the user (16) to supply heat to the user, low-temperature water after heat emission to the user (16) returns to the heat exchange station through the secondary network water return station outer pipeline (18), enters and exits the circulating pump (3) through the secondary network water return second pipe (20) to pressurize and then enters the open-state ball valve B (4), pressurized water enters and exits the electric ball valve (5) and the open-state ball valve B (7) responsible for diagnosing water loss, and enters and exits the primary network relay pump station water supply (25) through the open-state relay pump station water return pipeline (12) rear end on the primary network relay pump station water return pipeline (24) to complete the circulation.
6. The heating system for reducing primary network backwater temperature of claim 5, wherein: when the return water temperature of the primary network cannot meet the heat supply requirement of the secondary network, one of the return water temperatures of the primary network relay cannot meet the heat supply requirement of the secondary network, and the other return water temperature of the primary network relay exceeds the low-temperature operation heat supply requirement of the secondary network; when the temperature of the primary network relay backwater can not meet the heat supply requirement of the secondary network, the electric regulating butterfly valve (15) is closed, and the electric regulating valve (8) plays a role in regulating the water supply flow of the primary network; the method comprises the steps that a primary network relay pump station water return pipeline (24) is arranged at the front end of a relay water return horizontal type dirt remover (11) and enters and exits a secondary network horizontal type dirt remover (6) through a secondary network water supply first pipe (23) through an electric ball valve (5), then the primary network water supply pipeline passes through a flowmeter (7), primary network high-temperature water of a primary network water supply pipe is pressurized through a primary network water supply dirt remover (10) and a flowmeter (9), the water is mixed with water of the secondary network water supply first pipe (23) at the rear side of the flowmeter (7) after being regulated to a proper flow through an electric regulating valve (8), then the water is jointly fed into an open-state ball valve B (4), then enters a user (16) through a secondary network water supply station outer pipe (17) and supplies heat for the user, low-temperature water emitted to the user (16) returns to a heat exchange station through a secondary network water return station outer pipe (18), the secondary network water return second pipe (20) enters a circulating pump (3) to be pressurized, then enters the open-state ball valve B (4), the pressurized water enters the secondary network water return pipeline (5) and then enters a diagnostic flow meter (7), and then enters the secondary network water return pipeline (24) after being fed into the relay pump station (24), and finally enters the primary network water return pipeline (25) through the relay water supply relay station; when the relay backwater temperature of the primary network exceeds the low-temperature operation heat supply requirement of the secondary network, the electric regulating valve (8) is closed, and the electric regulating butterfly valve (15) plays a role in regulating the flow of the mixed water in the low-temperature operation; the front end of a first-level network relay pump station water return pipeline (24) passes through a first secondary network water supply pipeline (23) to enter and exit the second-level network horizontal type sewage remover (6) through an electric ball valve (5), then the flow rate is regulated to a proper flow rate through a flow meter (7) and an electric regulating ball valve on a low-temperature operation water mixing pipe (22), then a ball valve B (4) entering an opening state enters a user (16) to supply heat after entering an external pipeline (17) of the second-level network water supply station, low-temperature water after heat emission to the user (16) returns to a heat exchange station through an external pipeline (18) of the second-level network water return pipeline, a circulating pump (3) is pressurized through a second-level network water return pipeline (20) and then enters an opening state ball valve B (4), a part of pressurized water enters the electric ball valve (5) and a flow meter (7) responsible for diagnosing water loss, and the rear end of the relay pump (12) on the first-level network relay pump station water return pipeline (24) returns to the first-level network relay pump station water supply pipeline (24) after opening.
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| JP2008232447A (en) * | 2007-03-16 | 2008-10-02 | Osaka Gas Co Ltd | Hot water supply system |
| WO2015127572A1 (en) * | 2014-02-28 | 2015-09-03 | 清华大学 | Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof |
| CN106839048A (en) * | 2016-11-24 | 2017-06-13 | 天津市津安热电有限公司 | A kind of cascade utilization heating system and method with the mixed water of once net backwater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2544475B1 (en) * | 1983-04-12 | 1985-08-09 | Eco Systemes | INDIVIDUAL HEAT PUMP HEATING GENERATOR AND HEATING SYSTEM |
| KR101175516B1 (en) * | 2010-05-28 | 2012-08-23 | 엘지전자 주식회사 | Hot water supply device associated with heat pump |
| CN101949559A (en) * | 2010-09-21 | 2011-01-19 | 杭州哲达科技股份有限公司 | Intelligent energy-saving mixed water heat supply method |
| CN102278784B (en) * | 2011-05-13 | 2013-07-17 | 新疆西部热力集团有限公司 | Distributed direct-mixing heat supply system |
| CN204438291U (en) * | 2015-01-28 | 2015-07-01 | 太原智博热电工程设计有限公司 | The mixed water direct-heating system hot systems that first-level pipeline network, secondary network directly connect |
| CN209688954U (en) * | 2018-01-02 | 2019-11-26 | 烟台清泉实业有限公司 | A kind of heating system reducing level-one net return water temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008232447A (en) * | 2007-03-16 | 2008-10-02 | Osaka Gas Co Ltd | Hot water supply system |
| WO2015127572A1 (en) * | 2014-02-28 | 2015-09-03 | 清华大学 | Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof |
| CN106839048A (en) * | 2016-11-24 | 2017-06-13 | 天津市津安热电有限公司 | A kind of cascade utilization heating system and method with the mixed water of once net backwater |
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