A pickling device for plate heat exchanger

Abstract

The utility model discloses a plate heat exchanger pickling device, including cleaning box, placing rack and rubber sealing cover, the placing rack is used for fixing multiple sets of plate piece, the rubber sealing cover covers on the cleaning box, the bottom of cleaning box is provided with multiple sets of ultrasonic transducer, the placing rack includes horizontal board, the first limit frame and second limit frame are fixedly arranged on the horizontal board, the shape of first limit frame and second limit frame adapts the notching of plate piece, the lower extreme of horizontal board is provided with the spigot and socket joint column, the inside bottom surface on cleaning box is provided with the spigot and socket joint seat, the spigot and socket joint column inserts into the spigot and socket joint seat. The utility model can make multiple sets of plate piece disposable place into the cleaning box, and ensure that the plate piece is not adhered between, and the taking and placing of multiple sets of plate piece are convenient, and the cleaning fluid can fully permeate the flow passage, and the cleaning is thorough, and multiple sets of plate piece are fixed on the placing rack according to the order, therefore, it is not easy to make mistake when assembling, and uses ultrasonic cleaning as the auxiliary means.

Description

Technical Field

[0001] This utility model relates to the field of plate heat exchanger cleaning technology, specifically to a plate heat exchanger acid washing device. Background Technology

[0002] In the sugar production process, the application of plate heat exchangers is closely related to their high heat transfer efficiency, flexibility in adapting to process requirements, and compliance with food processing hygiene requirements. The core advantage of plate heat exchangers is their high heat transfer coefficient; their corrugated plate design increases fluid turbulence and enhances heat transfer efficiency. In the sugar juice evaporation and concentration stage, the low-temperature sugar juice needs to be heated to boiling. Plate heat exchangers can complete heat exchange within a relatively small volume, reducing steam consumption and lowering production costs. Acid washing of plate heat exchangers is a chemical cleaning method for removing scale buildup (such as carbonates, sulfates, organic deposits, etc.) inside the equipment, aiming to restore heat exchange efficiency and extend equipment life.

[0003] When cleaning a plate heat exchanger, multiple sets of plates are first disassembled and then directly immersed in the cleaning tank. The plates are attached together, and the plate structure is complex with many dead corners in the flow channels. The cleaning fluid cannot fully penetrate these areas, resulting in local scale residue and incomplete cleaning. Furthermore, it is inconvenient to handle multiple sets of plates, and errors are easily made when manually marking them in sequence. Utility Model Content

[0004] The purpose of this invention is to provide a plate heat exchanger acid washing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a plate heat exchanger acid washing device, comprising a cleaning tank, a placement rack, and a rubber sealing cover. The placement rack is used to fix multiple sets of plates. The rubber sealing cover covers the cleaning tank. Multiple sets of ultrasonic transducers are arranged at the bottom of the cleaning tank. The placement rack includes a horizontal plate. A first limiting frame and a second limiting frame are fixedly arranged on the horizontal plate. The shapes of the first limiting frame and the second limiting frame are adapted to the slots of the plates. A plug-in post is provided at the lower end of the horizontal plate. A plug-in seat is provided on the bottom surface inside the cleaning tank. The plug-in post is inserted into the plug-in seat.

[0006] The cleaning tank has an acid pickling solution inlet pipe on one side, which is connected to an acid storage tank via a pipeline.

[0007] The cleaning tank has a rinsing water inlet pipe on one side, which is connected to a rinsing water storage tank via a pipeline.

[0008] The cleaning tank has a passivation liquid inlet pipe on one side, which is connected to the passivation liquid storage tank via a pipeline.

[0009] The cleaning tank has a deionized water inlet pipe on one side, which is connected to a deionized water storage tank via a pipeline.

[0010] The bottom of the cleaning tank is equipped with a drain pipe, and a valve is installed on the drain pipe.

[0011] The rubber sealing cap is equipped with an exhaust pipe.

[0012] The plug-in pins are provided in two sets, and the plug-in sockets are provided in two sets.

[0013] The ultrasonic transducer is connected to the ultrasonic generator.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model arranges multiple sets of plates on a placement rack in sequence, with a certain gap reserved between adjacent plates. The insertion pins of the placement rack are inserted into the insertion sockets for fixation. This allows multiple sets of plates to be placed into the cleaning tank at once, ensuring that the plates do not stick together. It is convenient to pick up and put away multiple sets of plates, and the cleaning fluid can fully penetrate into the flow channel for thorough cleaning. Since the multiple sets of plates are fixed on the placement rack in sequence, it is not easy to make mistakes during assembly.

[0016] 2. This utility model uses ultrasonic cleaning as an auxiliary means, combined with chemical cleaning, to improve the cleaning quality. The acidic gas generated during the cleaning process is discharged to the acid mist collection and treatment system through the exhaust pipe of the rubber sealing cover to prevent the acid mist from spreading and ensure operational safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the split structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the assembled state of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixing of the plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the placement rack of this utility model;

[0021] Figure 5 This is a top view structural diagram of the cleaning box of this utility model;

[0022] Figure 6 This is a top view of the cleaning box structure of this utility model.

[0023] In the diagram: 1. Cleaning tank; 2. Placement rack; 3. Plate; 4. Rubber sealing cover; 5. Ultrasonic transducer; 11. Pickling solution inlet pipe; 12. Rinse water inlet pipe; 13. Passivation solution inlet pipe; 14. Deionized water inlet pipe; 15. Connector; 16. Drain pipe; 17. Valve; 21. Horizontal plate; 22. First limit frame; 23. Second limit frame; 24. Connector post; 41. Exhaust pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 This utility model provides a technical solution: a plate heat exchanger acid washing device, including a cleaning box 1, a placement rack 2 and a rubber sealing cover 4. The placement rack 2 is used to fix multiple sets of plates 3. The rubber sealing cover 4 covers the cleaning box 1. Multiple sets of ultrasonic transducers 5 are arranged at the bottom of the cleaning box 1. The placement rack 2 includes a horizontal plate 21. A first limiting frame 22 and a second limiting frame 23 are fixedly arranged on the horizontal plate 21. The shapes of the first limiting frame 22 and the second limiting frame 23 are adapted to the slots of the plates 3. A plug-in post 24 is arranged at the lower end of the horizontal plate 21. A plug-in seat 15 is arranged on the bottom surface inside the cleaning box 1. The plug-in post 24 is inserted into the plug-in seat 15.

[0026] Disassemble multiple sets of plates 3 of the plate heat exchanger and label them in sequence, such as... Figure 3 As shown, the slots at both ends of the plate 3 can pass through the first limiting frame 22 and the second limiting frame 23. Multiple sets of plates 3 are placed on the placement frame 2 in sequence, with a certain gap reserved between adjacent plates 3. After multiple sets of plates 3 are fixed, the placement frame 2 is placed in the cleaning box 1, and the insertion post 24 of the placement frame 2 is inserted into the insertion seat 15 to achieve fixation.

[0027] Multiple sets of plates 3 can be placed into the cleaning box 1 at one time, ensuring that the plates 3 do not stick together. It is convenient to pick up and put away multiple sets of plates 3. During pickling, the cleaning solution can fully penetrate into the flow channel and clean thoroughly. After cleaning, multiple sets of plates 3 can be removed at one time. The multiple sets of plates 3 are fixed on the placement rack 2 in sequence, so it is not easy to make mistakes during assembly.

[0028] The cleaning tank 1 has an acid pickling liquid inlet pipe 11 on one side, which is connected to the acid storage tank via a pipe.

[0029] Select the appropriate acid solution according to the type of scale, such as hydrochloric acid, nitric acid, citric acid, etc. During pickling, driven by the pump, the pickling solution enters the cleaning tank 1 through the pickling solution inlet pipe 11. Multiple plates 3 are immersed in the pickling solution. The acid solution reacts chemically with the scale to dissolve or peel off the scale adhering to the surface of the plates 3. After pickling, the valve 17 of the drain pipe 16 is opened to drain the waste acid solution to the acid treatment system.

[0030] The washing tank 1 has a rinsing water inlet pipe 12 on one side, which is connected to the rinsing water storage tank via a pipe.

[0031] After pickling, rinsing is performed to avoid impurities remaining. Driven by the pump, the rinsing water enters the cleaning tank 1 through the rinsing water inlet pipe 12. Multiple plates 3 are immersed in the rinsing water and are rinsed by the rinsing water. After rinsing, the valve 17 of the drain pipe 16 is opened to drain the rinsing water, which is then discharged to the rinsing water treatment system.

[0032] The cleaning tank 1 has a passivation liquid inlet pipe 13 on one side, which is connected to the passivation liquid storage tank via a pipe.

[0033] After rinsing, passivation treatment is performed. After pickling, the surface of plate 3 is in an activated state and is prone to oxidation and corrosion. It needs to be protected by forming a dense oxide film through passivation. Driven by the pump, the passivation liquid enters the cleaning tank 1 through the passivation liquid inlet pipe 13. Multiple sets of plates 3 are immersed in the passivation liquid. After the passivation treatment is completed, the valve 17 of the drain pipe 16 is opened to drain the passivation liquid. The passivation liquid is discharged to the passivation liquid treatment system.

[0034] Among them, a deionized water inlet pipe 14 is provided on one side of the cleaning tank 1, and the deionized water inlet pipe 14 is connected to the deionized water storage tank through a pipe.

[0035] Finally, the multiple plates 3 are cleaned with deionized water to remove the passivation solution remaining on their surfaces. Driven by the pump, the deionized water enters the cleaning tank 1 through the deionized water inlet pipe 14, immersing the multiple plates 3 in the deionized water. After cleaning, the valve 17 of the drain pipe 16 is opened to drain the deionized water, which is then discharged to the deionized water treatment system. Finally, the rubber sealing cover 4 is opened, and the rack 2 along with the plates 3 can be removed. During the cleaning process, ultrasonic cleaning is used as an auxiliary method in combination with chemical cleaning to improve the cleaning quality.

[0036] The bottom of the cleaning tank 1 is equipped with a drain pipe 16, and a valve 17 is installed on the drain pipe 16.

[0037] The rubber sealing cover 4 is equipped with an exhaust pipe 41. During the pickling process, the acid reacts with the scale and releases a large amount of acidic gas. The acidic gas is discharged to the acid mist collection and treatment system through the exhaust pipe 41 to prevent the acid mist from spreading and ensure operational safety.

[0038] The plug-in pins 24 are provided in two sets, and the plug-in sockets 15 are provided in two sets.

[0039] Among them, the ultrasonic transducer 5 is connected to the ultrasonic generator. The ultrasonic generator converts 50Hz power frequency AC into high frequency AC and transmits it to the ultrasonic transducer 5 through the wire. The ultrasonic transducer 5 uses the piezoelectric effect to convert high frequency electrical energy into mechanical vibration of the same frequency, and then transmits energy through the cleaning fluid to stimulate the "cavitation effect" to achieve cleaning.

[0040] Working principle: During use, disassemble the multiple sets of plates 3 of the plate heat exchanger and label them in sequence, such as... Figure 3 As shown, multiple sets of plates 3 are placed on the placement rack 2 in sequence, with a certain gap reserved between adjacent plates 3. After the multiple sets of plates 3 are fixed, the placement rack 2 is placed in the cleaning tank 1, and the insertion post 24 of the placement rack 2 is inserted into the insertion seat 15 to achieve fixation. The rubber sealing cover 4 is then covered. Driven by the pump, the pickling solution enters the cleaning tank 1 through the pickling solution inlet pipe 11. The multiple sets of plates 3 are immersed in the pickling solution, and the acid solution reacts chemically with the scale to dissolve or peel off the scale adhering to the surface of the plates 3. After pickling, the valve 17 of the drain pipe 16 is opened to drain the waste acid solution to the acid treatment system. After pickling, rinsing is performed. Driven by the pump, rinsing water enters the cleaning tank 1 through the rinsing water inlet pipe 12. The multiple sets of plates 3 are immersed in the rinsing water and rinsed by the rinsing water. After rinsing, the drain pipe... Valve 17 of pipe 16 is opened to drain the rinsing water, which is then discharged to the rinsing water treatment system. After rinsing, passivation treatment is performed. Driven by the pump, the passivation liquid enters the cleaning tank 1 through the passivation liquid inlet pipe 13. Multiple sets of plates 3 are immersed in the passivation liquid. After the passivation treatment is completed, valve 17 of drain pipe 16 is opened to drain the passivation liquid, which is then discharged to the passivation liquid treatment system. Next, multiple sets of plates 3 are cleaned with deionized water. Driven by the pump, deionized water enters the cleaning tank 1 through the deionized water inlet pipe 14. Multiple sets of plates 3 are immersed in the deionized water. After the cleaning is completed, valve 17 of drain pipe 16 is opened to drain the deionized water, which is then discharged to the deionized water treatment system. During the cleaning process, ultrasonic cleaning is used as an auxiliary method in combination with chemical cleaning to improve the cleaning quality. Finally, the rubber sealing cover 4 is opened, and the placement rack 2 along with the plates 3 are taken out together.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plate heat exchanger acid washing device, comprising a cleaning tank (1), a placement rack (2), and a rubber sealing cover (4), characterized in that: The placement rack (2) is used to fix multiple sets of plates (3). The rubber sealing cover (4) covers the cleaning box (1). Multiple sets of ultrasonic transducers (5) are provided at the bottom of the cleaning box (1). The placement rack (2) includes a horizontal plate (21). A first limiting frame (22) and a second limiting frame (23) are fixedly provided on the horizontal plate (21). The shapes of the first limiting frame (22) and the second limiting frame (23) are adapted to the slots of the plates (3). A plug-in post (24) is provided at the lower end of the horizontal plate (21). A plug-in seat (15) is provided on the bottom surface inside the cleaning box (1). The plug-in post (24) is inserted into the plug-in seat (15).

2. The plate heat exchanger acid washing device according to claim 1, characterized in that: A pickling liquid inlet pipe (11) is provided on one side of the cleaning tank (1), and the pickling liquid inlet pipe (11) is connected to the acid storage tank through a pipeline.

3. The plate heat exchanger acid washing device according to claim 1, characterized in that: A rinsing water inlet pipe (12) is provided on one side of the cleaning tank (1), and the rinsing water inlet pipe (12) is connected to the rinsing water storage tank through a pipe.

4. The pickling device for a plate heat exchanger according to claim 1, characterized in that: A passivation liquid inlet pipe (13) is provided on one side of the cleaning tank (1), and the passivation liquid inlet pipe (13) is connected to the passivation liquid storage tank through a pipeline.

5. The acid washing device for a plate heat exchanger according to claim 1, characterized in that: A deionized water inlet pipe (14) is provided on one side of the cleaning tank (1), and the deionized water inlet pipe (14) is connected to the deionized water storage tank through a pipe.

6. The plate heat exchanger acid washing device according to claim 1, characterized in that: The bottom of the cleaning tank (1) is provided with a drain pipe (16), and a valve (17) is installed on the drain pipe (16).

7. The acid washing device for a plate heat exchanger according to claim 1, characterized in that: An exhaust pipe (41) is provided on the rubber sealing cover (4).

8. The plate heat exchanger acid washing device according to claim 1, characterized in that: Two sets of the plug pins (24) and two sets of the plug sockets (15) are provided.

9. The acid washing device for a plate heat exchanger according to claim 1, characterized in that: The ultrasonic transducer (5) is connected to the ultrasonic generator.

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