On-line cleaning device for tubular heat exchanger

Abstract

The utility model discloses an on-line cleaning device for a tubular heat exchanger, which comprises the tubular heat exchanger, a pneumatic diaphragm pump and a cleaning agent diluent tank, a cold and hot water outlet pipe and a recycled ethylene glycol inlet pipe are arranged at the top of the tubular heat exchanger, and a recycled ethylene glycol outlet pipe and a cold and hot water inlet pipe are arranged at the bottom of the tubular heat exchanger. The recycled ethylene glycol inlet pipe is communicated with the upper portion of the cleaning agent diluent tank through the cleaning agent diluent return pipe, the lower portion of the cleaning agent diluent tank is communicated with the recycled ethylene glycol outlet pipe through the cleaning agent diluent inlet pipe, and the pneumatic diaphragm pump is arranged on the cleaning agent diluent inlet pipe. The online cleaning device for the shell-and-tube heat exchanger is simple in structure and convenient to use, scales in a shell pass of the shell-and-tube heat exchanger are effectively cleaned through the shell-and-tube heat exchanger, the pneumatic diaphragm pump, the cleaning agent diluent tank and innovative pipeline design, and the use amount of recycled ethylene glycol is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of online cleaning devices, in particular to an online cleaning device for a shell and tube heat exchanger. Background Art

[0002] The shell and tube heat exchanger for recycled ethylene glycol in slurry configuration is an important device in the polyester production process. Its main function is to heat or cool the recycled ethylene glycol before slurry configuration. However, during the use of the existing shell and tube heat exchanger, it was found that it was prone to scaling (the medium is recycled ethylene glycol, which is relatively dirty), and the shell side cannot be disassembled and cleaned online. Over time, scaling of the shell side of the shell and tube heat exchanger is likely to occur, which ultimately affects the stability of polyester production.

[0003] Based on the above situation, the utility model proposes an online cleaning device for a shell and tube heat exchanger, which can effectively solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide an online cleaning device for a shell and tube heat exchanger. The online cleaning device for a shell and tube heat exchanger of the utility model has a simple structure and is easy to use. Through a shell and tube heat exchanger, a pneumatic diaphragm pump, a cleaning agent dilution tank, and an innovative pipeline design, the scale in the shell of the shell and tube heat exchanger can be effectively removed and cleaned, thereby ensuring the amount of recycled ethylene glycol.

[0005] The utility model is realized by the following technical solutions:

[0006] A shell and tube heat exchanger online cleaning device comprises a shell and tube heat exchanger, a pneumatic diaphragm pump and a cleaning agent dilution liquid tank, wherein the top of the shell and tube heat exchanger is provided with a cold and hot water outlet pipe and a recycled ethylene glycol inlet pipe, the bottom of the shell and tube heat exchanger is provided with a recycled ethylene glycol outlet pipe and a cold and hot water inlet pipe, the recycled ethylene glycol inlet pipe is connected with the upper part of the cleaning agent dilution liquid tank through a cleaning agent dilution liquid return pipe, the lower part of the cleaning agent dilution liquid tank is connected with the recycled ethylene glycol outlet pipe through a cleaning agent dilution liquid inlet pipe, and the pneumatic diaphragm pump is arranged on the cleaning agent dilution liquid inlet pipe.

[0007] The purpose of the utility model is to provide an online cleaning device for a shell and tube heat exchanger. The online cleaning device for a shell and tube heat exchanger of the utility model has a simple structure and is easy to use. Through a shell and tube heat exchanger, a pneumatic diaphragm pump, a cleaning agent dilution tank, and an innovative pipeline design, the scale in the shell of the shell and tube heat exchanger can be effectively removed and cleaned, thereby ensuring the amount of recycled ethylene glycol.

[0008] Preferably, a cleaning agent dilution liquid tank discharge pipe is connected to the bottom of the cleaning agent dilution liquid tank.

[0009] Preferably, a water vapor inlet pipe is provided in the cleaning agent dilution liquid tank, and the inlet of the water vapor inlet pipe is provided outside the cleaning agent dilution liquid tank.

[0010] Preferably, one end of the water vapor inlet pipe is connected to a water vapor condensate discharge pipe, and the outlet of the water vapor condensate discharge pipe is arranged outside the cleaning agent dilution liquid tank.

[0011] Preferably, valves are provided on the cold and hot water outlet pipes, recycled ethylene glycol inlet pipe, recycled ethylene glycol outlet pipe, cold and hot water inlet pipes, cleaning agent dilution return pipe, cleaning agent dilution inlet pipe, cleaning agent dilution tank discharge pipe, water vapor inlet pipe, and water vapor condensate discharge pipe.

[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0013] 1. It can fully clean the scale in the shell of the tube heat exchanger, ensure the amount of recycled ethylene glycol, and make it easier to maintain stable production;

[0014] 2. The pneumatic diaphragm pump is used as the power of the self-circulating pipeline, which avoids the risk of explosion and fire caused by electricity consumption and is safe and reliable;

[0015] 3. In the cleaning operation, the amount of manual work can be greatly reduced, achieving the effect of saving time and labor;

[0016] 4. Through the action of alkali solution, the scale in the shell can be effectively cleaned, the service life of the shell and tube heat exchanger can be extended, and the workload of relevant personnel can be reduced;

[0017] 5. Reduce the waste of ethylene glycol during the operation process and avoid ethylene glycol overflowing into the sewage system and causing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0020] The technical features of the shell and tube heat exchanger, pneumatic diaphragm pump and cleaning agent dilution tank described in the utility model (constituent units / elements of the utility model) are obtained from conventional commercial channels or prepared by conventional methods unless otherwise specified. Their specific structures, working principles, and possible control methods and spatial layout methods can be selected conventionally in the field and should not be regarded as the innovative points of the utility model. They are understandable to those skilled in the art, and the utility model patent will not be further elaborated.

[0021] Embodiment 1:

[0022] like Figure 1 As shown, the utility model provides an online cleaning device for a shell and tube heat exchanger, comprising a shell and tube heat exchanger 1, a pneumatic diaphragm pump 6 and a cleaning agent dilution liquid tank 8, wherein the top of the shell and tube heat exchanger 1 is provided with a cold and hot water outlet pipe 2 and a recycled ethylene glycol inlet pipe 3, the bottom of the shell and tube heat exchanger 1 is provided with a recycled ethylene glycol outlet pipe 4 and a cold and hot water inlet pipe 5, the recycled ethylene glycol inlet pipe 3 is connected with the upper part of the cleaning agent dilution liquid tank 8 through a cleaning agent dilution liquid return pipe 7, the lower part of the cleaning agent dilution liquid tank 8 is connected with the recycled ethylene glycol outlet pipe 4 through a cleaning agent dilution liquid inlet pipe 12, and the pneumatic diaphragm pump 6 is arranged on the cleaning agent dilution liquid inlet pipe 12.

[0023] Embodiment 2:

[0024] like Figure 1 As shown, the utility model provides an online cleaning device for a shell and tube heat exchanger, comprising a shell and tube heat exchanger 1, a pneumatic diaphragm pump 6 and a cleaning agent dilution liquid tank 8, wherein the top of the shell and tube heat exchanger 1 is provided with a cold and hot water outlet pipe 2 and a recycled ethylene glycol inlet pipe 3, the bottom of the shell and tube heat exchanger 1 is provided with a recycled ethylene glycol outlet pipe 4 and a cold and hot water inlet pipe 5, the recycled ethylene glycol inlet pipe 3 is connected with the upper part of the cleaning agent dilution liquid tank 8 through a cleaning agent dilution liquid return pipe 7, the lower part of the cleaning agent dilution liquid tank 8 is connected with the recycled ethylene glycol outlet pipe 4 through a cleaning agent dilution liquid inlet pipe 12, and the pneumatic diaphragm pump 6 is arranged on the cleaning agent dilution liquid inlet pipe 12.

[0025] The bottom of the cleaning agent dilution tank 8 is connected to a cleaning agent dilution tank discharge pipe 11 .

[0026] Furthermore, in another embodiment, a water vapor inlet pipe 9 is provided in the cleaning agent dilution liquid tank 8 , and an inlet of the water vapor inlet pipe 9 is provided outside the cleaning agent dilution liquid tank 8 .

[0027] Water vapor can flow through the water vapor inlet pipe 9 to heat the liquid in the cleaning agent dilution tank 8 .

[0028] Furthermore, in another embodiment, one end of the water vapor inlet pipe 9 is connected to a water vapor condensate discharge pipe 10 , and an outlet of the water vapor condensate discharge pipe 10 is arranged outside the cleaning agent dilution liquid tank 8 .

[0029] The water vapor condensate discharge pipe 10 allows the condensate generated by the water vapor to flow out, thereby preventing the condensate from accumulating in the pipe.

[0030] Furthermore, in another embodiment, valves are provided on the cold and hot water outlet pipe 2, the recycled ethylene glycol inlet pipe 3, the recycled ethylene glycol outlet pipe 4, the cold and hot water inlet pipe 5, the cleaning agent dilution return pipe 7, the cleaning agent dilution inlet pipe 12, the cleaning agent dilution tank discharge pipe 11, the water vapor inlet pipe 9, and the water vapor condensate discharge pipe 10.

[0031] Setting valves can precisely control the direction of liquid flow.

[0032] The working principle of one embodiment of the utility model is as follows:

[0033] An online cleaning device for a shell and tube heat exchanger, wherein a pneumatic diaphragm pump 6 transports the cleaning agent in a cleaning agent dilution tank 8 to a shell and tube heat exchanger 1, and then transports the cleaning agent back to the cleaning agent dilution tank 8 after cleaning, forming a self-circulating pipeline.

[0034] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the online cleaning device for a shell and tube heat exchanger of the present invention, and can produce the positive effects recorded in the present invention.

[0035] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the drawings and according to specific circumstances.

[0036] Unless otherwise specified and limited, in the present invention, the terms "disposed", "connected" and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An online cleaning device for a shell and tube heat exchanger, characterized in that: It includes a shell and tube heat exchanger, a pneumatic diaphragm pump and a cleaning agent dilution liquid tank. The top of the shell and tube heat exchanger is provided with a cold and hot water outlet pipe and a recycled ethylene glycol inlet pipe, the bottom of the shell and tube heat exchanger is provided with a recycled ethylene glycol outlet pipe and a cold and hot water inlet pipe, the recycled ethylene glycol inlet pipe is connected with the upper part of the cleaning agent dilution liquid tank through a cleaning agent dilution liquid return pipe, the lower part of the cleaning agent dilution liquid tank is connected with the recycled ethylene glycol outlet pipe through a cleaning agent dilution liquid inlet pipe, and the pneumatic diaphragm pump is arranged on the cleaning agent dilution liquid inlet pipe.

2. The online cleaning device for a shell and tube heat exchanger according to claim 1 is characterized in that: The bottom of the cleaning agent dilution liquid tank is connected with a cleaning agent dilution liquid tank discharge pipe.

3. The online cleaning device for a shell and tube heat exchanger according to claim 1, characterized in that: A water vapor inlet pipe is arranged in the cleaning agent dilution liquid tank, and an inlet of the water vapor inlet pipe is arranged outside the cleaning agent dilution liquid tank.

4. The online cleaning device for a shell and tube heat exchanger according to claim 3 is characterized in that: One end of the water vapor inlet pipe is connected to a water vapor condensate discharge pipe, and the outlet of the water vapor condensate discharge pipe is arranged outside the cleaning agent dilution liquid tank.

5. The online cleaning device for a shell and tube heat exchanger according to claim 1, characterized in that: Valves are provided on the cold and hot water outlet pipes, recycled ethylene glycol inlet pipe, recycled ethylene glycol outlet pipe, cold and hot water inlet pipes, cleaning agent dilution return pipe, cleaning agent dilution inlet pipe, cleaning agent dilution tank discharge pipe, water vapor inlet pipe, and water vapor condensate discharge pipe.

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