Online operation cleaning equipment for circulating cooling water heat exchanger

Abstract

The utility model relates to the technical field of heat exchanger cleaning, in particular to online operation cleaning equipment for a circulating cooling water heat exchanger, which comprises a heat exchanger, a water chilling unit connected with the heat exchanger through a pipeline, and a liquid storage tank respectively connected with the heat exchanger and the water chilling unit through pipelines. According to the online cleaning device for the heat exchanger, the double advantages of chemical cleaning and physical cleaning are ingeniously combined, online operation cleaning of the heat exchanger is successfully achieved, the cleaning efficiency is greatly improved, and the continuous stability of the production process is guaranteed. By introducing the water chilling unit, the on-line cleaning system is successfully miniaturized, so that the whole system is more portable and flexible and is convenient to quickly move and use in a device area, and the application scene and the flexibility of the on-line cleaning system are greatly widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger cleaning technical field, concretely relates to a kind of circulating cooling water heat exchanger on-line operation cleaning equipment. BACKGROUND

[0002] Circulating cooling water heat exchanger is a kind of heat exchanger with water as cooling medium and recycling. In industrial production, a lot of heat is generated in many equipment or process, which needs to be cooled to maintain its normal operation. Circulating cooling water heat exchanger absorbs and carries away heat by circulating cooling water through the cooling part of the equipment, and then dissipates heat to the atmosphere through heat dissipation equipment, so as to realize the cooling of equipment.

[0003] Circulating cooling water heat exchanger, as the core component in modern chemical production process, plays an indispensable role. Circulating cooling water heat exchanger ensures temperature control in production process through efficient heat exchange, so as to ensure the continuity of production and the quality of products. However, in the process of continuous circulation, deposits will inevitably form on the internal surface of the heat exchanger, which is called fouling.

[0004] The formation of fouling is mainly due to the accumulation of minerals, microorganisms and other impurities in the cooling water on the wall of heat exchanger. These deposits not only reduce the effective area of heat exchange, but also increase the resistance of heat conduction, resulting in significant reduction of heat exchange efficiency. In addition, fouling also accelerates the corrosion rate of equipment, because the water environment under the scale layer is often more severe, which promotes the occurrence of electrochemical corrosion.

[0005] In order to solve this problem, the industry generally adopts the strategy of adding chemical agents in circulating cooling water system. These agents can delay the process of fouling to a certain extent by adjusting water quality, dispersing impurities and inhibiting microbial growth. However, although the use of chemical agents has positive effects, they cannot completely prevent the occurrence of fouling. With the passage of time, a certain thickness of scale will inevitably accumulate in the heat exchanger.

[0006] When the heat exchange performance of heat exchanger is reduced due to fouling and cannot meet the production requirements, enterprises usually have two choices: one is to switch to standby heat exchanger in parallel operation to ensure the continuity of production; The second is to stop production for thorough cleaning operation of the affected heat exchanger. No matter which choice, it will bring additional investment cost and increase of maintenance cost. Switching to standby heat exchanger means that additional equipment investment is needed, and in the long-term operation, the maintenance and management of standby heat exchanger also become an important task. While stopping production for cleaning operation, it directly leads to production interruption, which not only affects the economic benefit of enterprise, but also may delay the delivery period of customers, damage the market reputation of enterprise.

[0007] Therefore, how to effectively clean the scaling problem of circulating cooling water heat exchangers and reduce the resulting investment and maintenance costs has become a key technical problem that urgently needs to be solved in modern chemical production. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides an online cleaning device for circulating cooling water heat exchangers.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows: an online cleaning device for a circulating cooling water heat exchanger, comprising a heat exchanger, a chiller unit connected to the heat exchanger via pipelines, and a storage tank connected to the heat exchanger and the chiller unit via pipelines respectively.

[0010] The heat exchanger is equipped with a circulating cooling water inlet pipeline and a circulating cooling water return pipeline. A remote inlet valve is installed on the circulating cooling water inlet pipeline, and a remote outlet valve is installed on the circulating cooling water return pipeline.

[0011] The chiller unit includes an adjacent condenser and an evaporator. The condenser is equipped with a condenser inlet flexible connection line connected to the circulating cooling water inlet line and a condenser outlet flexible connection line connected to the circulating cooling water return line. The condenser inlet flexible connection line is equipped with an inlet valve, and the condenser outlet flexible connection line is equipped with an outlet valve. The evaporator is equipped with an evaporator outlet flexible connection line and a pump outlet line. The evaporator outlet flexible connection line is connected to the circulating cooling water inlet line, and a cleaning valve is installed on the evaporator outlet flexible connection line.

[0012] The liquid outlet of the storage tank is connected to a centrifugal pump via an outlet pipeline. The outlet end of the centrifugal pump is connected to the pump outlet pipeline. The liquid inlet of the storage tank is connected to a filter assembly via an inlet pipeline. The other end of the filter assembly is connected in sequence to a return liquid pipeline and a return liquid flexible connection pipeline. The other end of the return liquid flexible connection pipeline is connected to the circulating cooling water return pipeline. A second cleaning valve is installed on the return liquid flexible connection pipeline.

[0013] Furthermore, the filter assembly includes a filter one and a filter two arranged in parallel. The filter one is provided with an inlet valve and an outlet valve at both ends, and the filter two is provided with an inlet valve and an outlet valve at both ends.

[0014] Furthermore, a centrifugal pump inlet valve and a Y-type filter are sequentially installed on the liquid outlet pipeline.

[0015] Further, an outlet check valve, a centrifugal pump outlet valve and an evaporator inlet valve are sequentially arranged on the pump outlet pipeline.

[0016] Further, a liquid inlet valve is arranged on the liquid inlet pipeline.

[0017] Further, a branch pipeline is arranged between the connection of the liquid return pipeline and the liquid inlet pipeline and the pump outlet pipeline, and a branch pipeline valve is arranged on the branch pipeline.

[0018] Further, an evaporator outlet valve is arranged at the outlet end of the evaporator.

[0019] Further, a liquid return valve is arranged at the connection of the liquid return pipeline and the condenser inlet flexible connection pipeline.

[0020] Further, a condenser inlet valve is arranged at the inlet end of the condenser, and a condenser outlet valve is arranged at the outlet end of the condenser.

[0021] Further, a proximal water inlet valve is arranged at the water inlet of the heat exchanger, and a proximal water outlet valve is arranged at the water outlet of the heat exchanger.

[0022] The utility model discloses reached the beneficial effects are:

[0023] The utility model ingeniously combines the double advantages of chemical cleaning and physical cleaning, successfully realizes the online operation cleaning of the heat exchanger, not only greatly promotes the cleaning efficiency, but also ensures the continuous stability of the production process.

[0024] The utility model greatly reduces the use amount of chemical cleaning agent by optimizing the cleaning mechanism, not only reduces the influence on the environment, but also significantly saves the operation cost.

[0025] The utility model is simple and clear in interface with the circulating cooling water heat exchanger, and is very convenient to install and disassemble, so that the online operation cleaning operation can be carried out at any time according to the needs, without complicated preparation and waiting for shutdown.

[0026] In summary, the utility model discloses through a series of technical innovation, realized the long -term stable operation of circulating cooling water heat exchanger, effectively prolonged the service life of equipment, reduced the investment cost of enterprise and the economic loss of maintenance of shutdown simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the whole structure schematic diagram of the utility model.

[0028] Marked explanation in the drawing: 1, liquid storage tank, 2, water chiller unit, 3, heat exchanger, 4, centrifugal pump, 5, evaporator, 6, condenser, 7, filter one, 8, filter two, 9, centrifugal pump inlet valve, 10, Y type filter, 11, outlet check valve, 12, centrifugal pump outlet valve, 13, evaporator inlet valve, 14, evaporator outlet valve, 15, condenser inlet valve, 16, condenser outlet valve, 17, filter one inlet valve, 18, filter one outlet valve, 19, filter two inlet valve, 20, filter two outlet valve, 21, liquid inlet valve, 22, branch pipeline valve, 23, circulating cooling water inlet pipeline, 24, circulating cooling water return pipeline, 25, water inlet reserved valve, 26, remote water inlet valve, 27, cleaning valve one, 28, near-end water inlet valve, 29, near-end water outlet valve, 30, cleaning valve two, 31, remote water outlet valve, 32, water outlet reserved valve, 33, liquid return valve, 34, material inlet pipeline, 35, material outlet pipeline, 36, filter assembly, 37, branch pipeline, 38, liquid return pipeline, 39, liquid inlet pipeline, 40, liquid outlet pipeline, 41, pump outlet pipeline, 42, evaporator outlet flexible connection pipeline, 43, condenser inlet flexible connection pipeline, 44, liquid return flexible connection pipeline, 45, condenser outlet flexible connection pipeline. DETAILED DESCRIPTION

[0029] In order to better understand the purpose, structure and function of the utility model, the utility model a circulating cooling water heat exchanger online operation cleaning equipment is further described in detail below in conjunction with the drawings.

[0030] As Figure 1 Indicated, a circulating cooling water heat exchanger online operation cleaning equipment, including heat exchanger 3, through pipeline and being connected with water chiller unit 2 and through pipeline respectively with heat exchanger 3 and water chiller unit 2 being connected liquid storage tank 1. Heat exchanger 3 is used to the material that enters heat exchanger 3 is cooled, and liquid storage tank 1 is used to the scale in heat exchanger 3 is cleaned, and water chiller unit 2 is cooled to the circulating water between heat exchanger 3 and liquid storage tank 1.

[0031] The heat exchanger 3 is provided with a material inlet pipeline 34 and a material outlet pipeline 35. The material to be cooled enters the heat exchanger 3 through the material inlet pipeline 34, and the material is cooled in the heat exchanger 3 by circulating cooling water, and then flows out of the heat exchanger 3 through the material outlet pipeline 35. The heat exchanger 3 is also provided with a circulating cooling water inlet pipeline 23 and a circulating cooling water outlet pipeline 24. The circulating cooling water enters the heat exchanger 3 through the circulating cooling water inlet pipeline 23 to cool the material in the heat exchanger 3, and then flows out of the heat exchanger 3 through the circulating cooling water outlet pipeline 24. The circulating cooling water inlet pipeline 23 is sequentially provided with a distal water inlet valve 26 and a proximal water inlet valve 28. The proximal water inlet valve 28 is closer to the water inlet of the heat exchanger 3. The circulating cooling water outlet pipeline 24 is sequentially provided with a proximal water outlet valve 29 and a distal water outlet valve 31. The proximal water outlet valve 29 is closer to the water outlet of the heat exchanger 3.

[0032] The water chiller 2 comprises a condenser 6 and an evaporator 5 close to each other, the condenser 6 is respectively provided with a condenser inlet flexible connecting pipeline 43 and a condenser outlet flexible connecting pipeline 45, one end of the condenser inlet flexible connecting pipeline 43 is connected with an inlet end of the condenser 6, the other end of the condenser inlet flexible connecting pipeline 43 is connected with a circulating cooling water inlet pipeline 23, the connecting port is arranged behind a far-end water inlet valve (the front-rear direction is determined according to the circulating cooling water flow direction, and the circulating cooling water flow direction is regarded as the front direction), and the condenser inlet flexible connecting pipeline 43 is close to the circulating cooling water source, the condenser inlet flexible connecting pipeline 43 is provided with a water inlet reserved valve 25 and a condenser inlet valve 15, the water inlet reserved valve 25 is close to the connecting position of the condenser inlet flexible connecting pipeline 43 and the circulating cooling water inlet pipeline 23, and the condenser inlet valve 15 is close to the inlet end of the condenser 6; one end of the condenser outlet flexible connecting pipeline 45 is connected with an outlet end of the condenser 6, the other end of the condenser outlet flexible connecting pipeline 45 is connected with a circulating cooling water return pipeline 24, the connecting port is arranged in front of a far-end water outlet valve 31, the condenser outlet flexible connecting pipeline 45 is provided with a condenser outlet valve 16 and a water outlet reserved valve 32, the condenser outlet valve 16 is arranged at the outlet end of the condenser 6, and the water outlet reserved valve 32 is close to the connecting position of the condenser outlet flexible connecting pipeline 45 and the circulating cooling water return pipeline 24. The evaporator 5 is respectively provided with an evaporator outlet flexible connecting pipeline 42 and a pump outlet pipeline 41, one end of the evaporator outlet flexible connecting pipeline 42 is connected with an outlet end of the evaporator 5, the other end of the evaporator outlet flexible connecting pipeline 42 is connected with the circulating cooling water inlet pipeline 23, the connecting port is arranged between a far-end water inlet valve 26 and a near-end water inlet valve 28, the evaporator outlet flexible connecting pipeline 42 is provided with an evaporator outlet valve 14 and a cleaning valve 27, the evaporator outlet valve 14 is arranged at the outlet end of the evaporator 5, and the cleaning valve 27 is close to the connecting position of the evaporator outlet flexible connecting pipeline 42 and the circulating cooling water inlet pipeline 23; one end of the pump outlet pipeline 41 is connected with an inlet end of the evaporator 5, the other end of the pump outlet pipeline 41 is connected with an outlet end of the centrifugal pump 4, the pump outlet pipeline 41 is sequentially provided with an outlet check valve 11, a centrifugal pump outlet valve 12 and an evaporator inlet valve 13, the evaporator inlet valve 13 is arranged at the inlet end of the evaporator 5, and the outlet check valve 11 and the centrifugal pump outlet valve 12 are close to the centrifugal pump 4.

[0033] The cleaning liquid for cleaning the inside of the heat exchanger 3 is arranged in the liquid storage tank 1. The liquid outlet of the liquid storage tank 1 is connected with a liquid outlet pipeline 40, the other end of the liquid outlet pipeline 40 is connected with the inlet end of the centrifugal pump 4. The centrifugal pump inlet valve 9 and the Y-type filter 10 are arranged in sequence on the liquid outlet pipeline 40. The Y-type filter 10 can ensure that the fluid in the pipeline system is unobstructed, avoiding system downtime or failure caused by impurities blocking. The liquid inlet of the liquid storage tank 1 is connected with a liquid inlet pipeline 39. The liquid inlet pipeline 39 is provided with a filter assembly 36. The liquid inlet pipeline 39 is provided with a liquid inlet valve 21, which is close to the liquid inlet of the liquid storage tank 1. The other end of the liquid inlet pipeline 39 is connected with a liquid return pipeline 38. The end of the liquid return pipeline 38 is connected with a liquid return flexible pipeline 44. The other end of the liquid return flexible pipeline 44 is connected with the circulating cooling water return pipeline 24. The connection is arranged between the near-end water outlet valve 29 and the far-end water outlet valve 31. The liquid return flexible pipeline 44 is provided with a cleaning valve two 30, which is close to the connection between the liquid return flexible pipeline 44 and the circulating cooling water return pipeline 24. The connection between the liquid return flexible pipeline 44 and the liquid return pipeline 38 is provided with a liquid return valve 33.

[0034] The filter assembly 36 includes the filter one 7 and the filter two 8 arranged in parallel. The inlet end of the filter one 7 is provided with a filter one inlet valve 17, and the outlet end of the filter one 7 is provided with a filter one outlet valve 18. The inlet end of the filter two 8 is provided with a filter two inlet valve 19, and the outlet end of the filter two 8 is provided with a filter two outlet valve 20. During system operation, in order to ensure the continuity and stability of the cleaning equipment, the filter one 7 and the filter two 8 in the filter assembly 36 are designed in a one active and one standby mode. At any given time point, one filter is in working condition, responsible for processing the flowing fluid, while the other filter is in standby condition. Such configuration allows cleaning or replacing the filter in use at any time without interrupting system operation. Once it is detected that the filter one 7 is blocked, efficiency is reduced or other maintenance is needed, the filter two 8 can be switched to immediately, while the necessary cleaning or maintenance work of the filter one 7 is started. This flexible switching mechanism, combined with regular maintenance and inspection, can ensure that the filter assembly 36 always operates efficiently, thereby ensuring the continuity and reliability of the entire system.

[0035] The branch pipeline 37 is provided between the connection of the liquid return pipeline 38 and the liquid inlet pipeline 39 and the pump outlet pipeline 41, the connection of the branch pipeline 37 and the pump outlet pipeline 41 is provided between the centrifugal pump outlet valve 12 and the evaporator inlet valve 13, and the branch pipeline valve 22 is arranged on the branch pipeline 37. According to the dirty and blocked condition of the heat exchanger 3 in the circulating cooling water system, the opening and closing degree of the branch pipeline valve 22 can be adjusted by the staff, the working pressure of the centrifugal pump 4 can be flexibly adjusted, and then the high-pressure and high-flow cleaning of the heat exchanger 3 can be realized, so that the problem of narrow or blocked fluid channel caused by sediment, impurities or scaling in the heat exchanger 3 can be effectively solved.

[0036] During the cleaning operation, the cleaning agent solution is mixed in the storage tank 1 according to the volume of the circulating cooling water heat exchanger 3, the centrifugal pump 4 is started, the circulating cooling water far-end water inlet valve 26 and the far-end water outlet valve 31 of the circulating cooling water heat exchanger 3 are closed, and the cleaning valve one 27 and the cleaning valve two 30 are opened. At this time, the cleaning solvent in the storage tank 1 enters the circulating cooling water heat exchanger 3 under the action of the centrifugal pump 4, and the circulating water remaining in the circulating cooling water heat exchanger 3 is pushed into the storage tank 1 to mix with the cleaning solvent and circulate. When the mixing is sufficient, the concentration of the cleaning solvent can be adjusted according to the needs. Subsequently, the water inlet reserved valve 25, the condenser inlet valve 15, the condenser outlet valve 16 and the water outlet reserved valve 32 are opened, so that the circulating cooling water enters the condenser 6 in the cold water unit 2, and the cold water unit 2 is started to cool the cleaning solvent to ensure the normal operation of the circulating cooling water heat exchanger 3. During operation, the filter one 7 and the filter two 8 in the filter assembly 36 are used alternately to clean and ensure the continuous operation of the cleaning equipment. According to the dirty and blocked condition of the circulating cooling water heat exchanger 3, the pressure of the centrifugal pump 4 can be adjusted through the straight pipeline valve to realize high-pressure and high-flow cleaning.

[0037] After cleaning, the cold water unit 2 is stopped first, then the circulating cooling water heat exchanger 3 cleaning valve one 27 and the cleaning valve two 30 are closed, the centrifugal pump 4 is stopped, the circulating cooling water far-end water inlet valve 26 and the far-end water outlet valve 31 are opened, the water inlet reserved valve 25 and the water outlet reserved valve 32 on the circulating cooling water pipeline are closed, the condenser inlet soft connection pipeline 43 and the condenser outlet soft connection pipeline 45 are removed, and the circulating cooling water heat exchanger 3 is restored to normal production.

[0038] The equipment that is not used for a long time after use needs to be flushed after the cleaning solvent is discharged, the filter assembly 36 is cleaned, and the water circuit of the evaporator 5 of the cold water unit 2 is nitrogen sealed.

[0039] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the application belong to the scope protected by the utility model.

Claims

1. An on-line cleaning apparatus for a recirculating cooling water heat exchanger, characterized by: The heat exchanger (3), the water chiller (2) connected with the heat exchanger (3) through a pipeline and the liquid storage tank (1) connected with the heat exchanger (3) and the water chiller (2) through pipelines respectively are included. The heat exchanger (3) is provided with a circulating cooling water inlet pipeline (23) and a circulating cooling water return pipeline (24), the circulating cooling water inlet pipeline (23) is provided with a remote water inlet valve (26), and the circulating cooling water return pipeline (24) is provided with a remote water outlet valve (31). The water chiller (2) includes adjacent condensers (6) and evaporators (5), the condensers (6) are respectively provided with a condenser inlet soft connection pipeline (43) connected with the circulating cooling water inlet pipeline (23) and a condenser outlet soft connection pipeline (45) connected with the circulating cooling water return pipeline (24), the condenser inlet soft connection pipeline (43) is provided with a water inlet reserved valve (25), the condenser outlet soft connection pipeline (45) is provided with a water outlet reserved valve (32), the evaporators (5) are provided with an evaporator outlet soft connection pipeline (42) and a pump outlet pipeline (41), the evaporator outlet soft connection pipeline (42) is connected with the circulating cooling water inlet pipeline (23), and the evaporator outlet soft connection pipeline (42) is provided with a cleaning valve (27). The liquid outlet of the liquid storage tank (1) is connected with a centrifugal pump (4) through a liquid outlet pipeline (40), the outlet end of the centrifugal pump (4) is connected with the pump outlet pipeline (41), the liquid inlet of the liquid storage tank (1) is connected with a filter assembly (36) through a liquid inlet pipeline (39), the other end of the filter assembly (36) is sequentially connected with a liquid return pipeline (38) and a liquid return soft connection pipeline (44), the other end of the liquid return soft connection pipeline (44) is connected to the circulating cooling water return pipeline (24), and the liquid return soft connection pipeline (44) is provided with a cleaning valve (30).

2. The apparatus according to claim 1, wherein: The filter assembly (36) includes parallelly arranged filter one (7) and filter two (8), the filter one (7) is respectively provided with a filter one inlet valve (17) and a filter one outlet valve (18) at two ends, and the filter two (8) is respectively provided with a filter two inlet valve (19) and a filter two outlet valve (20) at two ends.

3. The apparatus according to claim 1, wherein: The liquid outlet pipeline (40) is sequentially provided with a centrifugal pump inlet valve (9) and a Y-shaped filter (10).

4. The apparatus according to claim 1, wherein: The pump outlet pipeline (41) is sequentially provided with an outlet check valve (11), a centrifugal pump outlet valve (12) and an evaporator inlet valve (13).

5. The apparatus according to claim 1, wherein: The liquid inlet pipeline (39) is provided with a liquid inlet valve (21).

6. The apparatus according to claim 1, wherein: Branch pipelines (37) are arranged between the connection positions of the liquid return pipeline (38) and the liquid inlet pipeline (39) and the pump outlet pipeline (41), and the branch pipelines (37) are provided with branch pipeline valves (22).

7. The apparatus according to claim 1, wherein: The evaporator (5) is provided with an evaporator outlet valve (14) at an outlet end.

8. The apparatus according to claim 1, wherein: A liquid return valve (33) is arranged at the connection position of the liquid return pipeline (38) and the condenser inlet soft connection pipeline (43).

9. The apparatus according to claim 1, wherein: The condenser (6) is provided with a condenser inlet valve (15) at the inlet end and a condenser outlet valve (16) at the outlet end.

10. The apparatus according to claim 1, wherein: The heat exchanger (3) is provided with a proximal water inlet valve (28) at the water inlet and a proximal water outlet valve (29) at the water outlet.

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