A water chiller's blowdown device

Abstract

The utility model discloses a kind of sewage devices of water chilling unit, belong to the relevant technical field of water chilling unit, including cyclone separator, wide flow channel plate heat exchanger, water chilling unit and agitator, and the connecting pipe of connecting above each component, the first water pump for providing flow velocity is connected in the feed inlet of cyclone separator, the bottom flow port of cyclone separator is connected with three-way valve;The first port of three-way valve is connected with sewage pipe, and the water outlet of flush water pump is connected with second port;The water inlet of flush water pump is fixedly connected with water inlet pipe, and the top of flush water pump is installed with the timing starting device for timing starting;The top of three-way valve is installed with linkage device, which is started in linkage with flush water pump. The device can be cleaned by timing backwashing, can effectively prevent the blockage caused by particulate matter accumulation at the bottom of cyclone separator, significantly reduce the frequency and maintenance cost of manual cleaning, ensure long-term stable operation of system.

Description

Technical Field

[0001] This utility model belongs to the technical field of chiller units, specifically relating to a sewage discharge device for chiller units. Background Technology

[0002] The use of a blowdown device in chiller units aims to address the core issue of deteriorating circulating water quality. During unit operation, cooling water continuously evaporates and concentrates, leading to a significant accumulation of calcium and magnesium ions, impurities, and corrosion products. This results in two serious consequences: first, the formation of scale with extremely poor thermal conductivity on the inner walls of heat exchange tubes, severely reducing heat exchange efficiency and increasing energy consumption; second, it triggers microbial growth and system corrosion, causing pipe blockage or damage. Therefore, it is essential to periodically discharge some of the high-concentration wastewater through the blowdown device and replenish it with fresh water to control the total solids content in the system. This is a crucial and indispensable step in maintaining the efficient and stable operation of the chiller unit and extending its service life.

[0003] A search revealed a Chinese patent publication number CN 218435015 U, which discloses a sewage discharge device for a chiller unit. The device includes a chiller unit body, an inlet pipe fixedly connected to the right side of the chiller unit body, and a three-way valve fixedly connected to the right side of the inlet pipe. Through the sewage discharge mechanism, when the chiller unit body is discharged, the coarse filter, fine filter, and activated carbon filter set in the sewage discharge tank can effectively filter impurities in the sewage and effectively purify the sewage.

[0004] The aforementioned patent has the following drawbacks: the device filters sewage through a sewage tank, but when the user needs to clean the sewage tank, the equipment needs to be stopped and the sewage tank cleaned before it can be restarted, which increases hidden costs.

[0005] To address this, a wastewater discharge device for chiller units is proposed, which enables wastewater treatment via a hydrocyclone separator and includes a timed backwashing device at the underflow outlet to prevent clogging, thus achieving an automatic waste removal process. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the above-mentioned defects and provide a sewage discharge device for chiller units that can effectively solve the problem of sewage filtration, achieve timed backwashing, and prevent the sewage outlet of the device from being blocked.

[0007] To address one or more of the above-mentioned deficiencies or improvement needs in the prior art, this utility model provides a sewage discharge device for a chiller unit, including a cyclone separator, a wide-channel plate heat exchanger, a chiller unit, and an agitator, as well as connecting pipes connecting the above components. The feed inlet of the cyclone separator is connected to a first water pump for providing flow rate via a flange, and the underflow outlet of the cyclone separator is connected to a three-way valve via a flange. The first port of the three-way valve is connected to a sewage discharge pipe via a flange, and the second port is connected to the outlet of a flushing water pump via a flange. The inlet of the flushing water pump is fixedly connected to an inlet pipe, and a timer start device for timed start-up is installed on the top of the flushing water pump. A linkage device for linkage start-up with the flushing water pump is installed on the top of the three-way valve.

[0008] In some embodiments, the inlet of the first water pump is connected to the outlet of the agitator via a flange.

[0009] In some embodiments, a dosing tube is fixedly provided on the top of the stirrer.

[0010] In some embodiments, the overflow port of the cyclone separator is connected to a tee pipe via a flange, the first port of the tee pipe is connected to a third water pump for driving the flow of purified water via a flange, and the second port is connected to a butterfly valve via a flange.

[0011] In some embodiments, the end of the butterfly valve is connected to a water supply pipe via a flange.

[0012] In some embodiments, the outlet of the wide-channel plate heat exchanger is connected to the inlet of the agitator via a connecting pipe and a flange, and the inlet of the wide-channel plate heat exchanger is connected to a second water pump for driving sewage via a flange.

[0013] In some embodiments, the cold medium outlet of the wide-channel plate heat exchanger is connected to the water inlet of the chiller unit via a connecting pipe and a flange, and the cold medium inlet of the wide-channel plate heat exchanger is connected to the outlet of the third water pump via a flange.

[0014] In some embodiments, the inlet of the second water pump is connected to the drain outlet of the chiller unit via a connecting pipe and a flange.

[0015] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art: 1. The present invention relates to a sewage discharge device for a chiller unit, which can effectively prevent blockage caused by particulate matter accumulation at the bottom of the hydrocyclone separator through timed backflushing cleaning, significantly reducing the frequency of manual cleaning and maintenance costs, and ensuring long-term stable operation of the system.

[0016] 2. The present invention relates to a sewage discharge device for a chiller unit, which recycles the separated purified water through the system and recovers the waste heat from the sewage discharged by the chiller unit through a wide-channel plate heat exchanger to preheat the purified water, thereby reducing the need for replenishing new water and the energy consumption for subsequent heating, achieving energy-saving and water-saving effects.

[0017] 3. The sewage discharge device of the chiller unit of this utility model, under the enhanced mixing of the agitator, allows the agent and sewage to react quickly and fully, converting the ions that cause hard scale into solid particles that are easier to remove by the hydrocyclone separator, making the filtration process more thorough. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a sewage discharge device for a chiller unit according to an embodiment of this utility model; Figure 2 This is a top view of a sewage discharge device for a chiller unit according to an embodiment of this utility model; Figure 3 This is a front view of a sewage discharge device for a chiller unit according to an embodiment of this utility model; Figure 4 This is a rear view of a sewage discharge device for a chiller unit according to an embodiment of this utility model.

[0019] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1 cyclone separator, 2 wide-channel plate heat exchanger, 3 chiller unit, 4 agitator, 5 first water pump, 6 second water pump, 7 third water pump, 8 three-way pipe, 9 three-way valve, 10 butterfly valve, 11 water supply pipe, 12 chemical dosing pipe, 13 water inlet pipe, 14 sewage pipe, 15 connecting pipe, 16 flushing water pump, 17 timer start device, 18 linkage device. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0021] Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] Please refer to Figure 1-4A sewage discharge device for a chiller unit includes a cyclone separator 1, a wide-channel plate heat exchanger 2, a chiller unit 3, and an agitator 4, as well as a connecting pipe 15 connecting the above components. The inlet of the cyclone separator 1 is connected to a first water pump 5 for providing flow rate via a flange. The underflow outlet of the cyclone separator 1 is connected to a three-way valve 9 via a flange. The first port of the three-way valve 9 is connected to a sewage discharge pipe 14 via a flange, and the second port is connected to the outlet of a flushing water pump 16 via a flange. The inlet of the flushing water pump 16 is fixedly connected to an inlet pipe 13. A timer start device 17 for timed start is installed on the top of the flushing water pump 16. A linkage device 18 for linkage start with the flushing water pump 16 is installed on the top of the three-way valve 9.

[0023] The first pump 5 pumps wastewater mixed with chemicals tangentially into the chamber of the hydrocyclone 1 at high speed, achieving solid-liquid separation using centrifugal force. During normal operation, wastewater is discharged into the drain pipe 14 through the underflow port of the hydrocyclone 1 via the three-way valve 9. When the timer start device 17 is triggered, the linkage device 18 simultaneously starts the flushing water pump 16 and controls the three-way valve 9 to change its path, blocking the drain pipe 14 and connecting the outlet of the flushing water pump 16. The flushing water pump 16 then draws water from the inlet pipe 13 and flushes it at high speed into the underflow port of the hydrocyclone 1, backwashing any potential blockages. After flushing, the three-way valve 9 resets, continuing to isolate the flushing water path to prevent waste accumulation. Timed backwashing effectively prevents blockages caused by particulate matter buildup at the bottom of the hydrocyclone, significantly reducing the frequency of manual cleaning and maintenance costs, and ensuring long-term stable system operation.

[0024] In this embodiment, the inlet of the first water pump 5 is connected to the outlet of the agitator 4 via a flange, and a dosing pipe 12 is fixedly installed on the top of the agitator 4.

[0025] Users add chemicals (such as lime or soda ash) to the system through the dosing pipe 12. The chemicals enter the agitator 4 and mix thoroughly with the flowing wastewater, causing the dissolved calcium and magnesium ions in the water to react and form insoluble precipitates. Under the enhanced mixing of the agitator 4, the chemicals and wastewater react rapidly and thoroughly, converting the ions that cause scale buildup into solid particles that are easier to remove by the hydrocyclone separator 1, making the filtration process more thorough.

[0026] In this embodiment, the overflow port of the cyclone separator 1 is connected to a three-way pipe 8 via a flange. The first port of the three-way pipe 8 is connected to a third water pump 7 for driving the flow of purified water via a flange, and the second port is connected to a butterfly valve 10 via a flange. The end of the butterfly valve 10 is connected to a water inlet pipe 11 via a flange.

[0027] In the cyclone separator 1, the purified liquid (clean water) is discharged from the overflow port through the three-way pipe 8 and driven by the third water pump 7 to the cold medium inlet of the wide-channel plate heat exchanger 2 as a cooling medium. Users can open the butterfly valve 10 to add fresh water through the water supply pipe 11, which is also pumped into the wide-channel plate heat exchanger 2 by the third water pump 7. The system recycles the separated clean water and recovers waste heat from the sewage discharged from the chiller unit 3 through the wide-channel plate heat exchanger 2 to preheat the clean water, reducing the need for replenishing fresh water and the energy consumption for subsequent heating, thus achieving energy and water conservation.

[0028] In this embodiment, the hot medium outlet of the wide-channel plate heat exchanger 2 is connected to the inlet of the agitator 4 via a connecting pipe 15 and a flange. The cold medium outlet of the wide-channel plate heat exchanger 2 is connected to the water supply port of the chiller unit 3 via a connecting pipe 15 and a flange. The cold medium inlet of the wide-channel plate heat exchanger 2 is connected to the outlet of the third water pump 7 via a flange. The hot medium inlet of the plate heat exchanger 2 is connected to a second water pump 6 for driving sewage via a flange. The inlet of the second water pump 6 is connected to the drain port of the chiller unit 3 via a connecting pipe 15 and a flange.

[0029] The high-temperature wastewater discharged from chiller unit 3 first enters the hot medium inlet of the wide-channel plate heat exchanger 2, where its waste heat is transferred to the cold medium (i.e., the purified water from cyclone separator 1). After the temperature decreases, the wastewater is discharged from the hot medium outlet and enters the subsequent wastewater treatment stage. The heated purified water then enters the drain outlet of chiller unit 3. The wide-channel plate heat exchanger 2 adopts a three-pass design, with the medium flowing back and forth three or more times internally, and large channel gaps between the plates. This design fully utilizes the waste heat of the wastewater to preheat the purified water, improving system energy efficiency. Furthermore, the wide channel and three-pass structure ensure extremely high heat exchange efficiency while effectively handling any solid particles that may be present in the wastewater, preventing heat exchanger blockage and ensuring continuous and stable heat exchange.

[0030] In this example, a wastewater discharge device for a chiller unit is described. During operation, chemicals are first added through the dosing pipe 12. Wastewater discharged from the chiller unit 3 flows into the wide-channel plate heat exchanger 2 to release heat, and then enters the agitator 4 to mix with the chemicals, forming sediment. A first water pump 5 pumps the wastewater containing sediment into a hydrocyclone separator 1 for separation. The wastewater is discharged from the bottom outlet through a three-way valve 9 and a drain pipe 14. A timed start device 17 is triggered according to a set cycle, automatically flushing the bottom of the hydrocyclone separator 1 using the flushing pump 16 and the three-way valve 9 to prevent clogging. Simultaneously, the purified water separated by the hydrocyclone separator 1 flows from the overflow outlet into the wide-channel plate heat exchanger 2 to absorb heat, and then flows back to the water inlet of the chiller unit 3. New water can be added through a butterfly valve 10 and a water inlet pipe 11.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A sewage discharge device for a chiller unit, characterized in that: The system includes a hydrocyclone separator (1), a wide-channel plate heat exchanger (2), a chiller unit (3), and a stirrer (4), as well as a connecting pipe (15) connecting the above components. The feed inlet of the hydrocyclone separator (1) is connected to a first water pump (5) for providing flow rate via a flange. The underflow outlet of the hydrocyclone separator (1) is connected to a three-way valve (9) via a flange. The first port of the three-way valve (9) is connected to a drain pipe (14) via a flange, and the second port is connected to the outlet of a flushing water pump (16) via a flange. The inlet of the flushing water pump (16) is fixedly connected to an inlet pipe (13). A timer start device (17) for timed start is installed on the top of the flushing water pump (16). A linkage device (18) for linkage start with the flushing water pump (16) is installed on the top of the three-way valve (9).

2. The sewage discharge device for a chiller unit according to claim 1, characterized in that: The inlet of the first water pump (5) is connected to the outlet of the agitator (4) via a flange.

3. The sewage discharge device for a chiller unit according to claim 2, characterized in that: A dosing tube (12) is fixedly installed on the top of the stirrer (4).

4. The sewage discharge device for a chiller unit according to claim 1, characterized in that: The overflow port of the cyclone separator (1) is connected to a three-way pipe (8) via a flange. The first port of the three-way pipe (8) is connected to a third water pump (7) for driving the flow of purified water via a flange, and the second port is connected to a butterfly valve (10) via a flange.

5. The sewage discharge device for a chiller unit according to claim 4, characterized in that: The end of the butterfly valve (10) is connected to a water supply pipe (11) via a flange.

6. The sewage discharge device for a chiller unit according to claim 1, characterized in that: The outlet of the wide-channel plate heat exchanger (2) is connected to the inlet of the agitator (4) via a connecting pipe (15) and a flange. The inlet of the wide-channel plate heat exchanger (2) is connected to a second water pump (6) for driving sewage via a flange.

7. The sewage discharge device for a chiller unit according to claim 4, characterized in that: The cold medium outlet of the wide-channel plate heat exchanger (2) is connected to the water inlet of the chiller unit (3) through a connecting pipe (15) and a flange, and the cold medium inlet of the wide-channel plate heat exchanger (2) is connected to the outlet of the third water pump (7) through a flange.

8. A sewage discharge device for a chiller unit according to claim 6, characterized in that: The inlet of the second water pump (6) is connected to the drain outlet of the chiller unit (3) via a connecting pipe (15) and a flange.

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