CN220892664U

CN220892664U - Chilled water pipe network flushing system and chilled water pipe network system

Info

Publication number: CN220892664U
Application number: CN202321614548.6U
Authority: CN
Inventors: 方培秋; 王兴辉
Original assignee: Guangzhou Urban Investment Comprehensive Energy Investment Management Co ltd
Current assignee: Guangzhou Urban Investment Comprehensive Energy Investment Management Co ltd
Priority date: 2023-06-25
Filing date: 2023-06-25
Publication date: 2024-05-03
Anticipated expiration: 2033-06-25

Abstract

The utility model discloses a chilled water pipe network flushing system and a chilled water pipe network system, which belong to the flushing field of regional cold supply pipe networks, and comprise: the chilled water flushing and recycling device and the pipe network system; the chilled water flushing and recycling device comprises a water storage tank, a filtering device, a centrifugal pump, a pipeline and a valve between the water storage tank and the filtering device, and the pipeline network system comprises a flushing pipeline section, a communicating pipe, the pipeline between the communicating pipe and the valve; when the pipeline is washed, the pipe section to be washed and the chilled water washing circulation system are connected in parallel to form a loop, the pipeline is circularly washed in the loop, and chilled water can be recovered after washing is finished; the problems of water consumption and energy consumption existing in the conventional cold supply pipe network flushing process by adopting low-temperature water to flush the pipeline are solved.

Description

Chilled water pipe network flushing system and chilled water pipe network system

Technical Field

The utility model relates to the technical field of frozen water pipe network flushing, in particular to a frozen water pipe network flushing system and a frozen water pipe network system.

Background

In the refrigerating system, a circulating chilled water system is a closed circulating system, water is not evaporated, the water temperature is low, and the main problems of the system are metal corrosion and microorganism propagation. Along with the operation of the system, corrosion products and bacterial mud in the system are increased continuously, and impurities in the water often cause the blockage of copper pipes and fan coils of a heat exchanger of a host machine, so that the normal operation of a central air conditioner is seriously influenced, and a chilled water system needs to be cleaned.

When cleaning, a cleaning tank and a cleaning pump are generally used to connect with the system to form a closed loop for circulating cleaning, and after cleaning, the cleaning equipment is removed to discharge chilled water.

The area cooling pipe network has wide range, the pipe faults are difficult to be checked, the time of cleaning work is prolonged, meanwhile, the refrigerating water system has large storage capacity, and the problem of water and energy consumption exists in direct discharging of refrigerating water.

Patent CN211739363U discloses a mobile air conditioner chilled water flushing device with filtering capability; the device uses the flushing pump group that has the filtration jar to form the return circuit with municipal chilled water pipeline, and according to municipal chilled water return pipe and municipal chilled water delivery pipe's pipe diameter and scale, the size of timely matching pump, flushing pump group is nimble, adaptability is wide, still has the problem that above-mentioned water consumption was consumed energy.

Therefore, how to save energy and water for flushing regional freeze water pipe networks is still a problem to be solved.

Disclosure of Invention

In order to solve the problems of water consumption and energy consumption in the regional pipe network flushing process, the utility model provides a chilled water pipe network flushing system and a chilled water pipe network system, wherein the chilled water pipe network flushing system comprises a first butterfly valve and a second butterfly valve which are arranged at two ends of a second flushing pipe section of a pipe network, and a third butterfly valve and a fourth butterfly valve which are arranged at two ends of the first flushing pipe section of the pipe network, the second flushing pipe section and the first flushing pipe section are communicated through a communicating pipe, and a fifth butterfly valve is arranged on the communicating pipe; when flushing is carried out, the first butterfly valve, the second butterfly valve, the third butterfly valve and the fourth butterfly valve are closed, the flushing pipe section is disconnected from the chilled water system, and flushing is prepared;

The second flushing pipe section is communicated with the first flushing pipe section in series through a chilled water flushing circulation system;

Preferably, the second flushing pipe section is communicated with the communicating pipe near one end position thereof, and the second flushing pipe section is communicated with the chilled water flushing circulation system near the other end position thereof;

The first flushing pipe section is communicated with the communicating pipe at a position close to one end of the first flushing pipe section, the first flushing pipe section is communicated with the chilled water flushing circulation system at a position close to the other end of the first flushing pipe section, the communicating at a position close to the end of the first flushing pipe section can reduce the cleaning dead angle of the pipe section, and the cleaning effect of the pipeline is guaranteed.

Preferably, the chilled water flushing circulation system comprises a first blow-down valve, a water storage tank, a filtering device, a centrifugal pump and a second blow-down valve, wherein a water inlet of the water storage tank is communicated with a water outlet of the pipe network, the water outlet of the water storage tank is communicated with the water inlet of the pipe network through the centrifugal pump, the water storage tank collects cooling water of a flushing pipe section, and the cooling water is filtered and pumped into the flushing pipe section again for circulating cleaning;

The first blow-down valve is arranged between the water storage tank and the pipe network water outlet pipeline, and the second blow-down valve is arranged between the water storage tank and the pipe network water inlet pipeline; when the frozen water in the flushing pipe section is collected, the first blow-down valve is opened, the second blow-down valve is closed, and the frozen water enters the water storage tank;

At least one filtering device is arranged between the water outlet of the pipe network system and the water storage tank and between the water storage tank and the centrifugal pump;

Preferably, a first filtering device is arranged between the water outlet of the pipe network system and the water storage tank, and the first filtering device performs primary filtering, so that the filtering effect is improved, excessive sludge deposition in the water storage tank can be prevented, and the pipeline is prevented from being blocked; be provided with second filter equipment between water storage tank and the centrifugal pump, second filter equipment is in water storage tank low reaches, and the water storage tank can be stable, reduce the water velocity of second filter equipment water inlet to improve the dwell time in second filter equipment, provide good filter effect.

Preferably, a sixth butterfly valve is arranged between the water outlet of the water storage tank and the centrifugal pump.

Preferably, a seventh butterfly valve is arranged between the centrifugal pump and the second blowdown valve.

Preferably, a check valve is provided between the centrifugal pump and the seventh butterfly valve to prevent backflow of chilled water.

Preferably, a chemical adding device is arranged on a pipeline between the centrifugal pump and the water inlet of the pipe network system, chemical cleaning can be performed when more mud is in frozen water, and a cleaning agent is added through the chemical adding device when the chemical cleaning is performed.

Preferably, a sampling port is arranged on a pipeline close to the water outlet of the pipe network, so that the cleaning effect is judged, the medicine is added according to the cleaning effect, and meanwhile, the cleaning time is controlled more accurately.

Preferably, the top of the water storage tank is provided with a water tank opening, the bottom of the water storage tank is provided with a water outlet pipe, and when chemical cleaning is performed, water can be added through the water tank opening, and cleaning wastewater can be discharged through the water outlet pipe.

The chilled water pipe network system comprises a plurality of pipe network units and the chilled water pipe network flushing system, and the pipe network units are all connected in parallel to the chilled water flushing circulation system.

Preferably, each pipe network unit comprises a first flushing pipe section for water inflow and a second flushing pipe section for water outflow, the first flushing pipe section and the second flushing pipe section which are positioned in the same pipe network unit are connected in series with the chilled water flushing circulation system through communicating pipes, and the first flushing pipe section and the second flushing pipe section which are positioned in different pipe network units are connected in parallel to form a chilled water pipe network system.

Preferably, each pipe network unit is provided with a first blow-down valve, a second blow-down valve, a dosing device and a sampling port, and all pipe network units are jointly provided with a total blow-down valve and a total dosing device to control the joint drainage and dosing of the chilled water of the pipe network units.

Compared with the prior art, the utility model has the beneficial effects that:

1. The freezing water pipe networks of the areas are connected in parallel to carry out selective cleaning in different areas, so that the situation that the cleaning is impossible and the investigation is difficult due to the blockage of a section of pipeline under the general condition is avoided;

2. The device is provided with a water storage tank and a filtering device, the pipeline is circularly flushed by using the chilled water, and the recycling of the chilled water is realized after the filtering, so that the water and the energy are saved;

3. When the flushing recovery system is a first filtering device, a water storage tank and a second filtering device, the filtering effect can be effectively improved, and the first filtering device can prevent pipeline blockage caused by excessive precipitation in the water storage tank; the water storage tank can stabilize and reduce the water flow speed of the water inlet of the second filtering device, so that the residence time in the second filtering device is prolonged, and a good filtering effect is provided.

Drawings

For a clearer description of embodiments of the utility model or of solutions in the prior art, the drawings which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a piping diagram of a chilled water piping network flushing system;

FIG. 2 is a piping diagram of a chilled water piping network system including a chilled water piping network flushing system;

FIG. 3 is a piping diagram of a chilled water piping network flushing system that may be chemically cleaned;

FIG. 4 is a piping diagram of a chilled water piping network system that may be subjected to chemical cleaning.

Wherein: 1. a first butterfly valve; 2. a second butterfly valve; 3. a third butterfly valve; 4. a fourth butterfly valve; 5. a second flush tube segment; 6. a first flush tube segment; 7. a communicating pipe; 8. a fifth butterfly valve; 9. a first blow-down valve; 10. a sampling port; 11. a first filtering device; 12. a water storage tank; 13. a second filtering device; 14. a sixth butterfly valve; 15. a centrifugal pump; 16. a check valve; 17. a seventh butterfly valve; 18. a dosing device; 19. a second blow-down valve; 20. a water outlet pipe; 21. a total blow-down valve; 22. total dosing device.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

As shown in fig. 1, the chilled water network flushing system comprises: the first butterfly valve 1 and the second butterfly valve 2 are arranged at two ends of the second flushing pipe section 5 of the pipe network, the third butterfly valve 3 and the fourth butterfly valve 4 are arranged at two ends of the first flushing pipe section 6 of the pipe network, the second flushing pipe section 5 and the first flushing pipe section 6 are communicated through a communicating pipe 7, and a fifth butterfly valve 8 is arranged on the communicating pipe 7; when flushing is carried out, the first butterfly valve 1, the second butterfly valve 2, the third butterfly valve 3 and the fourth butterfly valve 4 are closed, the flushing pipe section is disconnected from the chilled water system, and flushing is prepared;

the second flushing pipe section 5 and the first flushing pipe section 6 are communicated in series through a chilled water flushing circulation system;

To connect the flushing pipe section with the chilled water flushing circulation system and form a closed loop, a communicating pipe needs to be arranged at the other end of the flushing pipe section, and in consideration of dead angles easily occurring if the connection position is close to the middle of the flushing pipe section, the position of the second flushing pipe section 5 close to one end thereof is connected with the communicating pipe 7, and the position of the second flushing pipe section 5 close to the other end thereof is connected with the chilled water flushing circulation system;

the first flushing pipe section 6 is communicated with the communicating pipe 7 near the end part of one end of the first flushing pipe section 6, the first flushing pipe section 6 is communicated with the chilled water flushing circulation system near the end part of the other end of the first flushing pipe section, and the communicating pipe near the end part can reduce the cleaning dead angle of the pipe section, so that the cleaning effect of the pipeline is ensured.

The chilled water flushing circulation system comprises a first blow-down valve 9, a water storage tank 12, a filtering device, a centrifugal pump 15 and a second blow-down valve 19, wherein a water inlet of the water storage tank 12 is communicated with a water outlet of a pipe network, the water outlet of the water storage tank 12 is communicated with the water inlet of the pipe network through the centrifugal pump 15, the water storage tank 12 collects cooling water of a flushing pipe section, and the cooling water is filtered and pumped into the flushing pipe section again for circulating cleaning;

The first blow-down valve 9 is arranged between the water storage tank 12 and the pipe network water outlet pipeline, and the second blow-down valve 19 is arranged between the water storage tank 12 and the pipe network water inlet pipeline; when the frozen water in the flushing pipe section is collected, the first blow-down valve 9 is opened, the second blow-down valve 19 is closed, and the frozen water enters the water storage tank 12;

in order to enable the chilled water to be pumped back to the pipe network system for heat exchange after being washed, impurities in the water need to be removed, the environment where the chilled water is located determines that the impurities are only bacterial mud and embroidered dirt, so that the dirt is removed by using a filtering mode, and at least one filtering device is arranged between a water outlet of the pipe network system and the water storage tank 12 and between the water storage tank 12 and the centrifugal pump 15;

As a preferred embodiment, a first filtering device 11 is arranged between the water outlet of the pipe network system and the water storage tank 12, and the first filtering device 11 performs primary filtering, so that the filtering effect is improved, excessive sludge deposition in the water storage tank 12 can be prevented, and the pipeline is prevented from being blocked; a second filter device 13 is arranged between the water storage tank 12 and the centrifugal pump 15, the second filter device 13 is positioned at the downstream of the water storage tank 12, and the water storage tank 12 can stabilize and reduce the water flow speed of the water inlet of the second filter device 13, so that the residence time in the second filter device 13 is prolonged, and a good filter effect is provided.

A sixth butterfly valve 14 is arranged between the water outlet of the water storage tank 12 and the centrifugal pump 15 for controlling the water flow condition between the components of the chilled water washing circulation system; a seventh butterfly valve 17 is arranged between the centrifugal pump 15 and the second blow-down valve 19; a check valve 16 is provided between the centrifugal pump 15 and the seventh butterfly valve 17 to prevent the chilled water from flowing backward.

As a preferred embodiment, considering that chemical cleaning is required when there is more mud, as shown in fig. 3, a chemical adding device 18 is provided in the pipeline between the centrifugal pump 15 and the water inlet of the pipe network system, and chemical cleaning is performed when there is more mud in the chilled water, and the cleaning agent is added through the chemical adding device 18 when chemical cleaning is performed.

The chemical cleaning is performed, the chemical cleaning time is required to be controlled, and the cleaning effect is observed, so that the sampling port 10 is arranged on the pipeline close to the water outlet of the pipe network for judging the cleaning effect, and the cleaning time is controlled more accurately by adding the medicine according to the cleaning effect.

The chemical cleaning often needs to be performed through several cycles, if the chemical cleaning needs to be performed, water needs to be fed into and discharged from the system, so the top of the water storage tank 12 is provided with a water tank opening, the bottom is provided with a water outlet pipe 20, and when the chemical cleaning is performed, water can be fed through the water tank opening, and cleaning wastewater can be discharged through the water outlet pipe 20.

As shown in fig. 2, the chilled water piping system comprises a plurality of piping units and the chilled water piping flushing system, and a plurality of piping units are all connected in parallel to the chilled water flushing circulation system.

Each pipe network unit comprises a first flushing pipe section 6 for water inflow and a second flushing pipe section 5 for water outflow, the first flushing pipe section 6 and the second flushing pipe section 5 which are positioned on the same pipe network unit are connected in series with the chilled water flushing circulation system through a communicating pipe 7, the first flushing pipe section 6 and the second flushing pipe section 5 which are positioned on different pipe network units are connected in parallel to form a chilled water pipe network system, and meanwhile, for controlling the pipe network units to jointly drain water, a total blow-down valve 21 is required to be arranged.

If chemical cleaning is performed, a total chemical adding device 22 is required to control the common chemical adding of a plurality of pipe network units; as shown in fig. 4, each pipe network unit is provided with a first blow-down valve 9, a second blow-down valve 19, a dosing device 18 and a sampling port 10, and all pipe network units are jointly provided with a total blow-down valve 21 and a total dosing device 22 to control the joint drainage and dosing of the chilled water of the pipe network units.

The using method of the chilled water pipe network flushing system is as follows:

And (3) a collection stage: closing the first butterfly valve 1, the second butterfly valve 2, the third butterfly valve 3, the fourth butterfly valve 4 and the second blow-down valve 19, opening the fifth butterfly valve 8, the first blow-down valve 9, the sixth butterfly valve 14 and the seventh butterfly valve 17, connecting the net closing unit with a flushing recovery system without forming a loop, and collecting chilled water in a flushing pipe section by the water storage tank 12;

And (3) a cyclic flushing stage: opening the second blow-down valve 19 and the centrifugal pump 15 for a flushing cycle;

Ending: the first blow-down valve 9, the second blow-down valve 19 and the centrifugal pump 15 are closed in sequence, the first butterfly valve 1, the second butterfly valve 2, the third butterfly valve 3 and the fourth butterfly valve 4 are opened, and chilled water is pumped into a chilled water pipe network again.

The utility model connects the freezing water pipe networks of the areas in parallel for selectively cleaning the areas, thereby avoiding the situation that the area cannot be cleaned and the investigation is difficult due to the blockage of a small section of pipeline under the general condition; the water storage tank 12 and the filtering devices 11 and 13 are arranged at the same time, the pipeline is circularly flushed by using the chilled water, and the recycling of the chilled water is realized after the filtering, so that the water and the energy are saved; the flushing recovery system is provided with the first filtering device 11, the water storage tank 12 and the second filtering device 13, so that the filtering effect can be effectively improved, and the first filtering device 11 can prevent pipeline blockage caused by excessive precipitation in the water storage tank 12; the water storage tank 12 can stabilize and reduce the water flow rate at the water inlet of the filter device 11, thereby improving the residence time in the second filter device 13 and providing good filtering effect.

The utility model has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the utility model, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.

Claims

1. The flushing system of the chilled water pipe network is characterized by comprising a first butterfly valve (1) and a second butterfly valve (2) which are arranged at two ends of a second flushing pipe section (5) of the pipe network, and a third butterfly valve (3) and a fourth butterfly valve (4) which are arranged at two ends of a first flushing pipe section (6) of the pipe network, wherein the second flushing pipe section (5) and the first flushing pipe section (6) are communicated through a communicating pipe (7), and a fifth butterfly valve (8) is arranged on the communicating pipe (7);

the second flushing pipe section (5) is communicated with the first flushing pipe section (6) through a chilled water flushing circulation system.

2. Chilled water network flushing system according to claim 1, wherein the second flushing pipe section (5) communicates with the communication pipe (7) near its one end position, and wherein the second flushing pipe section (5) communicates with the chilled water flushing circulation system near its other end position;

The first flushing pipe section (6) is communicated with the communicating pipe (7) near the end position of one end of the first flushing pipe section, and the first flushing pipe section (6) is communicated with the chilled water flushing circulation system near the end position of the other end of the first flushing pipe section.

3. The chilled water piping network flushing system according to claim 1, characterized in that the chilled water flushing circulation system comprises a first blowdown valve (9), a water tank (12), a filtering means, a centrifugal pump (15) and a second blowdown valve (19), wherein the water tank (12) water inlet is in communication with the pipe network water outlet, and wherein the water tank (12) water outlet is in communication with the pipe network water inlet through the centrifugal pump (15);

The first blow-down valve (9) is arranged between the water storage tank (12) and the pipe network water outlet pipeline; the second blow-down valve (19) is arranged between the water storage tank (12) and the pipe network water inlet pipeline;

At least one filtering device is arranged between the water outlet of the pipe network system and the water storage tank (12) and between the water storage tank (12) and the centrifugal pump (15).

4. A chilled water network flushing system according to claim 3, characterized in that a sixth butterfly valve (14) is arranged between the water reservoir (12) water outlet and the centrifugal pump (15).

5. Chilled water network flushing system according to claim 4, wherein the filtering means comprises a first filtering means (11) arranged between the network water outlet and the water reservoir (12), a second filtering means (13) arranged between the water reservoir (12) water outlet and the centrifugal pump (15); the sixth butterfly valve (14) is arranged between the second filter device (13) and the centrifugal pump (15).

6. A chilled water network flushing system according to claim 3, characterized in that a seventh butterfly valve (17) is arranged between the centrifugal pump (15) and the second sewage valve (19).

7. Chilled water network flushing system according to claim 6, wherein a check valve (16) is arranged between the centrifugal pump (15) and the seventh butterfly valve (17).

8. A chilled water network system comprising a plurality of network units and the chilled water network flushing system of any one of claims 1-7, wherein a plurality of network units are connected in parallel to the chilled water flushing circulation system.

9. A chilled water network system according to claim 8, wherein each of the network units comprises a first flushing pipe section (6) for inlet water and a second flushing pipe section (5) for outlet water, the first flushing pipe section (6) and the second flushing pipe section (5) being located in the same network unit being connected in series with the chilled water flushing circulation system by means of a communication pipe (7), the first flushing pipe section (6) and the second flushing pipe section (5) being located in different network units being connected in parallel.