Secondary cooling system
By introducing a circulating water tank to connect the heat exchanger and condenser in the injection water cooling system, purified water is used for heat exchange, and the problem of frozen water entering the condenser directly to the condenser is solved, achieving long life and low-cost maintenance of the condenser, ensuring the quality of injection water and production continuity.
Patent Information
- Application Number
- CN202422090158.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In the existing water cooling system for injection, the frozen water directly enters the heat exchanger, causing serious scaling, affecting the heat exchange effect, and is frequently cleaned and costly, which poses a risk of corrosion.
The secondary cooling system is adopted, and the heat exchanger and condenser are connected through the circulating water tank. The circulating water enters the condenser and heats up after the heat exchanger cools down, avoiding the cooling water entering the condenser directly, reducing the risk of scaling. The purified water in the circulating water tank is used to reduce the risk of scaling of the condenser.
Effectively extend the service life of the condenser, reduce cleaning frequency and maintenance costs, ensure the quality of injection water and water production flow, avoid pollution, and ensure the continuous production of the workshop.
Smart Images
Figure CN223258470U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection water preparation, in particular to a secondary cooling system. Background Art
[0002] The original WFI cooling system used chilled water directly connected to a heat exchanger, exchanging heat with the produced WFI and pure steam for cooling. Because the chilled water system is a self-circulating system, it contains a large amount of impurities. High heat exchanger temperatures can easily cause severe scaling in the WFI cooler's chilled water layer.
[0003] Chilled water contains a high concentration of impurities. Heat exchange in the heat exchanger causes the precipitation of calcium and magnesium ions and the deposition of sediment, resulting in severe scaling of the chilled water layer in the heat exchanger. Severe scaling in the heat exchanger reduces the heat transfer coefficient and efficiency, leading to high water temperatures of around 105°C, preventing complete condensation of steam, and producing a two-phase gas-liquid water state.
[0004] When a heat exchanger is severely scaled, it is typically cleaned with an acidic cleaning solution to flush out the scale layer. However, cleaning is costly, requiring a large amount of cleaning solution for each cleaning. This also requires multiple maintenance personnel, consuming both manpower and resources. Furthermore, each cleaning only maintains the heat exchanger's operation for a limited period of time, necessitating frequent cleanings.
[0005] The acidic substances in the medicine are corrosive to the heat exchanger. Frequent cleaning will cause the heat exchange tube to be corroded and perforated. Once the heat exchange tube is perforated, the chilled water will flow into the injection water and contaminate the injection water. Once the heat exchanger is perforated, it needs to be replaced with a new one, which seriously affects the production of the workshop. Utility Model Content
[0006] The purpose of the utility model is to provide a secondary cooling system to solve the technical problem that cooling water directly enters the condenser, causing the condenser to be easily scaled and affecting the heat exchange of the condenser.
[0007] The utility model provides a secondary cooling system, comprising a heat exchanger, a condenser and a circulating water tank, wherein the heat exchanger is provided with a first heat exchange water inlet and a first heat exchange water outlet, and the condenser is provided with a first condensation water inlet and a first condensation water outlet; a first circulation pipe is provided between the first heat exchange water outlet and the first condensation water inlet, the first condensation water outlet is connected to the first condensation water outlet pipe, and the first heat exchange water inlet is connected to the first heat exchange water inlet pipe; the first heat exchange water inlet pipe and the first condensation water outlet pipe are both connected to the circulating water tank;
[0008] The first heat exchange water inlet pipe is used to supply circulating water from the circulating water tank into the heat exchanger. After passing through the heat exchanger, the circulating water enters the condenser from the first circulation pipe. The circulating water passing through the condenser enters the circulating water tank.
[0009] After the circulating water exchanges heat with the heat exchanger, it enters the condenser. After the circulating water exchanges heat with the condenser, it enters the circulating water tank.
[0010] In an optional embodiment, the heat exchanger is provided with a second heat exchange water inlet and a second heat exchange water outlet; the second heat exchange water inlet is connected to the first water inlet pipe, and the second heat exchange water outlet is connected to the first water outlet pipe.
[0011] In an optional embodiment, a first auxiliary water inlet pipe is further included, one end of the first auxiliary water inlet pipe is connected to the first water inlet pipe, and the other end is connected to the first condensation water inlet of the condenser.
[0012] In an optional embodiment, valves are provided on both the first auxiliary water inlet pipe and the first water inlet pipe.
[0013] In an optional embodiment, a first auxiliary water outlet pipe is further included, one end of the first auxiliary water outlet pipe is connected to the first water outlet pipe, and the other end is connected to the first condensation water outlet of the condenser.
[0014] In an optional embodiment, valves are provided on both the first auxiliary water outlet pipe and the first water outlet pipe.
[0015] In an optional embodiment, the condenser is provided with a second condensation water outlet and a second condensation water inlet; and the second condensation water inlet is connected to the first injection pipe, and the second condensation water outlet is connected to the second injection pipe.
[0016] In an optional embodiment, a booster pump is provided on the first heat exchange water inlet pipe, and the booster pump is used to supply the circulating water in the circulating water tank into the heat exchanger.
[0017] In an optional embodiment, a cooling water supply system is further included, and the first water inlet pipe and the first water outlet pipe are both connected to the cooling water supply system.
[0018] In an optional embodiment, the circulating water tank is connected to a circulating water supply system, and the circulating water supply system is used to supply water to the circulating water tank.
[0019] The heat exchanger and condenser of the secondary cooling system provided by the utility model exchange heat through the circulating water in the circulating water tank. After the circulating water is cooled in the heat exchanger, it enters the condenser to increase its temperature. This prevents the cooling water from directly entering the condenser, causing scaling of the condenser, resulting in a decrease in the heat transfer coefficient of the condenser, and affecting the quality of the injection water and the water production flow rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 This is a structural schematic diagram of the secondary cooling system provided in an embodiment of the present utility model.
[0022] Icon: 100-heat exchanger; 101-first heat exchange outlet; 102-first heat exchange inlet; 103-second heat exchange inlet; 104-second heat exchange outlet; 200-condenser; 201-first condensation inlet; 202-first condensation outlet; 203-second condensation inlet; 204-second condensation outlet; 300-circulating water tank; 400-first circulation pipe; 500-first condensation outlet pipe; 600-first heat exchange inlet pipe; 700-first outlet pipe; 800-first auxiliary inlet pipe; 900-first auxiliary outlet pipe; 110-first inlet pipe; 120-first liquid injection pipe; 130-second liquid injection pipe. DETAILED DESCRIPTION
[0023] The terms "first", "second", "third", etc. are only used to distinguish and describe, and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.
[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0025] In the description of this application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.
[0026] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connected" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two elements.
[0027] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings.
[0028] Example
[0029] Reference Figure 1 The utility model provides a secondary cooling system, including a heat exchanger 100, a condenser 200 and a circulating water tank 300. The heat exchanger 100 is provided with a first heat exchange water inlet 102 and a first heat exchange water outlet 101, and the condenser 200 is provided with a first condensation water inlet 201 and a first condensation water outlet 202; a first circulation pipe 400 is provided between the first heat exchange water outlet 101 and the first condensation water inlet 201, the first condensation water outlet 202 is connected to a first condensation water outlet pipe 500, and the first heat exchange water inlet 102 is connected to a first heat exchange water inlet pipe 600; the first heat exchange water inlet pipe 600 and the first condensation water outlet pipe 500 are both connected to the circulating water tank 300;
[0030] The first heat exchange water inlet pipe 600 is used to supply the circulating water from the circulating water tank 300 into the heat exchanger 100. After passing through the heat exchanger 100, the circulating water enters the condenser 200 through the first circulation pipe 400. The circulating water passing through the condenser 200 enters the circulating water tank 300.
[0031] After the circulating water exchanges heat with the heat exchanger 100 , it enters the condenser 200 . After the circulating water exchanges heat with the condenser 200 , it enters the circulating water tank 300 .
[0032] In some embodiments, the circulating water in the circulating water tank 300 is purified water. The purified water enters the first heat exchange inlet pipe 600 from the circulating water tank 300, and enters the heat exchanger 100 through the first heat exchange inlet pipe 600. After heat exchange in the heat exchanger 100, the circulating water with reduced temperature enters the condenser 200 from the first circulation pipe 400; after pure steam enters the condenser 200, it forms injection water and increases the temperature of the circulating water in the condenser 200, and the high-temperature circulating water enters the circulating water tank 300 from the first condensation outlet pipe 500.
[0033] Generally, a temperature sensor is provided in the circulating water tank 300. The temperature of the circulating water in the circulating water tank 300 is measured by the temperature sensor, and the flow of cooling water entering the heat exchanger 100 is controlled to ensure that the temperature of the circulating water entering the condenser 200 is low enough to meet the requirements of liquefying pure steam and guarantee the output of water for injection.
[0034] In an optional embodiment, the heat exchanger 100 is provided with a second heat exchange water inlet 103 and a second heat exchange water outlet 104 ; the second heat exchange water inlet 103 is connected to the first water inlet pipe 110 , and the second heat exchange water outlet 104 is connected to the first water outlet pipe 700 .
[0035] In some embodiments, the second heat exchange inlet 103 of the heat exchanger 100 is connected to the first water inlet pipe 110, and the second heat exchange outlet 104 is connected to the first water outlet pipe 700; the cooling water supply system allows water with lower temperature to enter the heat exchanger 100 through the first water inlet pipe 110, and the cooling water passing through the heat exchanger 100 enters the cooling water supply system from the first water outlet pipe 700.
[0036] After the circulating water passes through the heat exchanger 100, the circulating water temperature can generally be reduced to 8-9°C; the circulating water uses purified water, which improves the water quality and reduces the risk of scaling of the condenser 200; the circulating water tank 300 can stabilize the water pressure, precipitate impurities, and replace and replenish the circulating water through the circulating water tank 300.
[0037] In an optional embodiment, a first auxiliary water inlet pipe 800 is further included, one end of the first auxiliary water inlet pipe 800 is connected to the first water inlet pipe 110 , and the other end is connected to the first condensation water inlet 201 of the condenser 200 .
[0038] In an optional embodiment, valves are provided on both the first auxiliary water inlet pipe 800 and the first water inlet pipe 110 .
[0039] In an optional embodiment, a first auxiliary water outlet pipe 900 is further included, one end of the first auxiliary water outlet pipe 900 is connected to the first water outlet pipe 700 , and the other end is connected to the first condensation water outlet 202 of the condenser 200 .
[0040] In an optional embodiment, valves are provided on both the first auxiliary water outlet pipe 900 and the first water outlet pipe 700 .
[0041] In some embodiments, a first auxiliary water outlet pipe 900 is also provided on the first water outlet pipe 700, and a first auxiliary water inlet pipe 800 is also provided on the first water inlet pipe 110. The first auxiliary water inlet pipe 800 is connected to the first condensation water inlet 201, and the first auxiliary water outlet pipe 900 is connected to the first condensation water outlet 202; when the circulating water tank 300 or the heat exchanger 100 is repaired or replaced, the cooling water directly enters the condenser 200 along the first auxiliary water inlet pipe 800, and the cooling water passing through the condenser 200 enters the first auxiliary water outlet pipe 900, thereby temporarily cooling the condenser 200 to ensure the normal production of water for injection.
[0042] In an optional embodiment, the condenser 200 is provided with a second condensation water outlet 204 and a second condensation water inlet 203; and the second condensation water inlet 203 is connected to the first injection pipe 120, and the second condensation water outlet 204 is connected to the second injection pipe 130.
[0043] The first injection pipe 120 is connected to pure steam. The pure steam enters the second condensation water inlet 203 from the first injection pipe 120 and is liquefied in the condenser 200 to form injection water. The injection water enters the second injection pipe 130 from the second condensation water outlet 204 to realize the production of injection water.
[0044] In an optional embodiment, a booster pump is provided on the first heat exchange water inlet pipe 600 , and the booster pump is used to supply the circulating water in the circulating water tank 300 into the heat exchanger 100 .
[0045] A pressure sensor is provided on the first circulation pipe 400 , and the pressure sensor cooperates with the booster pump. The booster pump adjusts the power of the booster pump according to the data of the pressure sensor; in this way, the circulating water can ensure the condensation effect of the condenser 200 .
[0046] In an optional embodiment, a cooling water supply system is further included, and the first water inlet pipe 110 and the first water outlet pipe 700 are both connected to the cooling water supply system.
[0047] The cooling water supply system supplies water to the heat exchanger 100 through the first water inlet pipe 110 and the first water outlet pipe 700 to cool the heat exchanger 100; the heat exchanger 100 cools the circulating water, and the circulating water cools the condenser 200, thereby condensing the pure steam into water for injection; the cooling water only enters the heat exchanger 100 when the heat exchanger 100 is scaled; the heat exchanger 100 is cleaned, and frequent cleaning will cause the heat exchange tubes to be corroded and perforated. The cooling water also only enters the circulating water and will not enter the water for injection, thereby avoiding contamination of the water for injection.
[0048] Valves are provided on the first water inlet pipe 110 , the first water outlet pipe 700 , the first auxiliary water inlet pipe 800 and the first auxiliary water outlet pipe 900 , and the cooling water of the cooling water supply system is controlled by the valves to enter the heat exchanger 100 or the condenser 200 .
[0049] Even if the heat exchanger 100 is damaged, the condenser 200 can be cooled through the first auxiliary water inlet pipe 800 and the first auxiliary water outlet pipe 900, ensuring normal production of injection water during replacement or maintenance of the heat exchanger 100.
[0050] In an optional embodiment, a circulating water supply system is connected to the circulating water tank 300 , and the circulating water supply system is used to supply water to the circulating water tank 300 .
[0051] A sensor is provided on the circulating water tank 300. When the level of the circulating water in the circulating water tank 300 drops to a certain range, the circulating water supply system supplies water to the circulating water tank 300 to ensure that the water in the circulating water tank 300 is within a certain range.
[0052] In the secondary cooling system provided by the present invention, heat exchange is carried out between the heat exchanger 100 and the condenser 200 through the circulating water in the circulating water tank 300. After the circulating water is cooled in the heat exchanger 100, it enters the condenser 200 to increase its temperature. This prevents the cooling water from directly entering the condenser 200, causing scaling of the condenser 200, resulting in a decrease in the heat transfer coefficient of the condenser 200, and affecting the quality of the injection water and the water production flow rate.
[0053] The secondary cooling system effectively solves the damage caused to the injection water machine condenser 200 by the poor quality of chilled water, extends the service life of the condenser 200, and avoids the impact on workshop production due to damage to the condenser 200 and shutdown for cleaning.
[0054] When the heat exchanger 100 of the secondary cooling system is cleaned and maintained, the injection water can be switched to the original cooling system in a short time, which will not affect the production of the workshop, can greatly save the maintenance cost, and can also ensure the normal production of the workshop, greatly improving the economic benefits.
[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A secondary cooling system, characterized in that: The invention comprises a heat exchanger (100), a condenser (200) and a circulating water tank (300), wherein the heat exchanger (100) is provided with a first heat exchange water inlet (102) and a first heat exchange water outlet (101), and the condenser (200) is provided with a first condensation water inlet (201) and a first condensation water outlet (202); a first circulation pipe (400) is provided between the first heat exchange water outlet (101) and the first condensation water inlet (201), the first condensation water outlet (202) is connected to a first condensation water outlet pipe (500), and the first heat exchange water inlet (102) is connected to a first heat exchange water inlet pipe (600); the first heat exchange water inlet pipe (600) and the first condensation water outlet pipe (500) are both connected to the circulating water tank (300); The first heat exchange water inlet pipe (600) is used to supply circulating water from the circulating water tank (300) into the heat exchanger (100); the circulating water passes through the heat exchanger (100) and then enters the condenser (200) from the first circulation pipe (400); and the circulating water passes through the condenser (200) and enters the circulating water tank (300); After the circulating water exchanges heat with the heat exchanger (100), it enters the condenser (200). After the circulating water exchanges heat with the condenser (200), it enters the circulating water tank (300).
2. The secondary cooling system according to claim 1, characterized in that: The heat exchanger (100) is provided with a second heat exchange water inlet (103) and a second heat exchange water outlet (104); the second heat exchange water inlet (103) is connected to the first water inlet pipe (110), and the second heat exchange water outlet (104) is connected to the first water outlet pipe (700).
3. The secondary cooling system according to claim 2, characterized in that: It also includes a first auxiliary water inlet pipe (800), one end of which is connected to the first water inlet pipe (110), and the other end of which is connected to the first condensing water inlet (201) of the condenser (200).
4. The secondary cooling system according to claim 3, characterized in that: Valves are provided on both the first auxiliary water inlet pipe (800) and the first water inlet pipe (110).
5. The secondary cooling system according to claim 2, characterized in that: It also includes a first auxiliary water outlet pipe (900), one end of which is connected to the first water outlet pipe (700), and the other end of which is connected to the first condensation water outlet (202) of the condenser (200).
6. The secondary cooling system according to claim 5, characterized in that: The first auxiliary water outlet pipe (900) and the first water outlet pipe (700) are both provided with valves.
7. The secondary cooling system according to claim 1, characterized in that: The condenser (200) is provided with a second condensation water outlet (204) and a second condensation water inlet (203); the second condensation water inlet (203) is connected to the first liquid injection pipe (120), and the second condensation water outlet (204) is connected to the second liquid injection pipe (130).
8. The secondary cooling system according to claim 1, characterized in that: A booster pump is provided on the first heat exchange water inlet pipe (600), and the booster pump is used to supply the circulating water in the circulating water tank (300) into the heat exchanger (100).
9. The secondary cooling system according to claim 2, characterized in that: It also includes a cooling water supply system, and the first water inlet pipe (110) and the first water outlet pipe (700) are both connected to the cooling water supply system.
10. The secondary cooling system according to claim 1, characterized in that: The circulating water tank (300) is connected to a circulating water supply system, and the circulating water supply system is used to supply water to the circulating water tank (300).