Pulse descaling device based on double-pipe heat exchanger

Abstract

The utility model relates to a pulse descaling device based on a double-pipe heat exchanger, which comprises the double-pipe heat exchanger, a pulse generator, a liquid storage tank, a first liquid inlet pipe, a second liquid inlet pipe, a third liquid outlet pipe, a second liquid outlet pipe and a first liquid outlet pipe, an outlet of the pulse generator is connected with an inlet of the double-pipe heat exchanger through a first liquid inlet pipe and a second liquid inlet pipe, an outlet of the liquid storage tank is connected with an inlet of the pulse generator through a third liquid outlet pipe, and an outlet of the double-pipe heat exchanger is connected with the second liquid outlet pipe and the first liquid outlet pipe. An outlet of the double-pipe heat exchanger is connected with an inlet of the liquid storage tank through the second liquid outlet pipe and the first liquid outlet pipe. According to the pulse descaling device based on the double-pipe heat exchanger, no chemical agent is added in the descaling operation process, and the pulse descaling device is small in energy consumption, environmentally friendly, easy to operate, high in cleaning efficiency, high in adaptability and low in descaling cost.

Description

Technical Field

[0001] The utility model relates to the field of heat exchangers, in particular to the technical field of descaling equipment for shell-and-tube heat exchangers, and specifically refers to a pulse descaling device based on the shell-and-tube heat exchanger. Background Art

[0002] With the continuous progress and development of society, the application scope of heat exchangers is becoming wider and wider. During the anaerobic fermentation process, it is usually necessary to control the temperature to achieve medium or high temperature anaerobic conditions. A shell and tube heat exchanger is needed to regulate the temperature during the fermentation process.

[0003] Heat exchangers are compact, efficient heat exchange devices. However, scaling is inevitable due to long-term operation. During routine operation, tubular heat exchangers can experience problems such as scaling, corrosion, and bio-sludge, which can severely impact the proper functioning of anaerobic equipment and increase operating costs. Severe scaling can lead to localized blockages and under-scale corrosion, directly impacting the temperature conditions of anaerobic fermentation. Therefore, heat exchangers should be cleaned regularly to remove scale and ensure efficient heat transfer and proper production.

[0004] At present, the mainstream descaling methods are mechanical cleaning (scraping, brushing), high-pressure cleaning, chemical cleaning (acid cleaning, alkaline cleaning) or replacement of heat exchange media, etc. The above methods have certain defects in terms of safety and economy.

[0005] Therefore, there is a need for a descaling device that can replace traditional pickling descaling and is easy to operate and cleans thoroughly. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a pulse descaling device based on a shell and tube heat exchanger which meets the requirements of convenient operation, thorough cleaning and good safety.

[0007] In order to achieve the above objectives, the pulse descaling device based on the shell and tube heat exchanger of the present invention is as follows:

[0008] The pulse descaling device based on a shell and tube heat exchanger has the following main features: the device includes a shell and tube heat exchanger, a pulse generator, a liquid storage tank, a first liquid inlet pipe, a second liquid inlet pipe, a third liquid outlet pipe, a second liquid outlet pipe and a first liquid outlet pipe; the inlet of the shell and tube heat exchanger is respectively connected to the first liquid inlet pipe and the second liquid inlet pipe; the outlet of the pulse generator is connected to the inlet of the shell and tube heat exchanger through the first liquid inlet pipe and the second liquid inlet pipe; the outlet of the liquid storage tank is connected to the inlet of the pulse generator through the third liquid outlet pipe; the outlet of the shell and tube heat exchanger is respectively connected to the second liquid outlet pipe and the first liquid outlet pipe; and the outlet of the shell and tube heat exchanger is connected to the inlet of the liquid storage tank through the second liquid outlet pipe and the first liquid outlet pipe.

[0009] Preferably, the device further comprises a visual mirror, and the visual mirror is arranged at the pipe connection between the liquid storage tank and the shell-and-tube heat exchanger.

[0010] Preferably, the device further comprises a first pressure tester and a second pressure tester, wherein the first pressure tester is arranged at the outlet pipe connection of the pulse generator; and the second pressure tester is arranged at the inlet pipe connection of the liquid storage tank.

[0011] Preferably, the device further comprises a first ball valve, and the first ball valve is arranged at the connection of the outlet pipe of the pulse generator.

[0012] Preferably, the device further comprises an intelligent control electric control box and an air compressor, wherein the intelligent control electric control box is connected to the pulse generator, and the intelligent control electric control box is connected to the air compressor.

[0013] Preferably, the liquid storage tank further includes a liquid storage tank dirt collection area, a liquid storage tank observation port and a drug addition port, and a sampling port. The liquid storage tank dirt collection area is arranged inside the liquid storage tank, the liquid storage tank observation port and the drug addition port is arranged on the top of the liquid storage tank, and the sampling port is arranged on the side of the liquid storage tank.

[0014] This innovative pulse descaling device, based on a shell-and-tube heat exchanger, eliminates the need for any chemicals during the descaling process, consumes minimal energy, and offers advantages such as environmental friendliness, ease of operation, high cleaning efficiency, strong adaptability, and low descaling costs. Citric acid can also be added to simultaneously descale, remove rust, and sterilize the pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a pulse descaling device based on a shell-and-tube heat exchanger according to the present invention.

[0016] Figure 2 This is a cross-sectional schematic diagram of a pulse generator of a pulse descaling device based on a shell-and-tube heat exchanger of the present invention.

[0017] Figure 3 It is a cross-sectional schematic diagram of the liquid storage tank of the pulse descaling device based on the shell and tube heat exchanger of the present invention.

[0018] Reference numerals:

[0019] 1 Shell and tube heat exchanger

[0020] 2 First liquid inlet pipe

[0021] 3 Second liquid inlet pipe

[0022] 4. First ball valve

[0023] 5. First Pressure Tester

[0024] 6 Pulse generator

[0025] 7 Third liquid outlet pipe

[0026] 8 fluid storage tank

[0027] 9 Visual mirror

[0028] 10 Second pressure tester

[0029] 11 Second liquid outlet pipe

[0030] 12 first liquid outlet pipe

[0031] 13 Pulse generator outlet

[0032] 14 Gas source import

[0033] 15 Pulse generator feed port

[0034] 16 Intelligent control electric control box

[0035] 17 Air compressor

[0036] 18 Liquid storage tank feed port

[0037] 19 Fluid reservoir dirt collection area

[0038] 20 Liquid storage tank observation port and reagent addition port

[0039] 21 sampling port

[0040] 22 Liquid storage tank outlet DETAILED DESCRIPTION

[0041] In order to more clearly describe the technical content of the present invention, further description will be given below in conjunction with specific embodiments.

[0042] The pulse descaling device based on the shell and tube heat exchanger of the present invention includes a shell and tube heat exchanger 1, a pulse generator 6, a liquid storage tank 8, a first liquid inlet pipe 2, a second liquid inlet pipe 3, a third liquid outlet pipe 7, a second liquid outlet pipe 11 and a first liquid outlet pipe 12. The inlet of the shell and tube heat exchanger 1 is respectively connected to the first liquid inlet pipe 2 and the second liquid inlet pipe 3, the outlet of the pulse generator 6 is connected to the inlet of the shell and tube heat exchanger 1 through the first liquid inlet pipe 2 and the second liquid inlet pipe 3, the outlet of the liquid storage tank 8 is connected to the inlet of the pulse generator 6 through the third liquid outlet pipe 7, the outlet of the shell and tube heat exchanger 1 is respectively connected to the second liquid outlet pipe 11 and the first liquid outlet pipe 12, and the outlet of the shell and tube heat exchanger 1 is connected to the inlet of the liquid storage tank 8 through the second liquid outlet pipe 11 and the first liquid outlet pipe 12.

[0043] As a preferred embodiment of the present invention, the device further comprises a visual mirror 9 , which is arranged at the pipe connection between the liquid storage tank 8 and the shell-and-tube heat exchanger 1 .

[0044] As a preferred embodiment of the present invention, the device also includes a first pressure tester 5 and a second pressure tester 10. The first pressure tester 5 is arranged at the outlet pipe connection of the pulse generator 6; the second pressure tester 10 is arranged at the inlet pipe connection of the liquid storage tank 8.

[0045] As a preferred embodiment of the present invention, the device further comprises a first ball valve 4 , which is arranged at the outlet pipe connection of the pulse generator 6 .

[0046] As a preferred embodiment of the present invention, the device further includes an intelligent control electric control box 16 and an air compressor 17 . The intelligent control electric control box 16 is connected to the pulse generator 6 , and the intelligent control electric control box 16 is connected to the air compressor 17 .

[0047] As a preferred embodiment of the present utility model, the liquid storage tank 8 also includes a liquid storage tank dirt collection area 19, a liquid storage tank observation port and a drug addition port 20, and a sampling port 21. The liquid storage tank dirt collection area 19 is arranged inside the liquid storage tank 8, the liquid storage tank observation port and a drug addition port 20 is arranged at the top of the liquid storage tank 8, and the sampling port 21 is arranged on the side of the liquid storage tank 8.

[0048] The utility model provides a pulse descaling device for a shell-and-tube heat exchanger, which relates to a pulse descaling device for a shell-and-tube heat exchanger in an anaerobic fermentation process, and provides two pulse forms. First, the pulse generator uses water and air as media to form high-frequency pulses generated by a high-frequency pulse generator 6 to form different frequencies to descale the pipeline, thereby achieving rapid flushing and descaling of the inner wall of the pipeline in different ways such as high-frequency oscillation, water hammer effect, spiral ring washing, and microbubble explosion. Second, the pulse generator releases a high-voltage direct current charging current, which discharges to the scaled pipe wall in water, generates a liquid-electric effect, converts electric power into liquid power, and discharges electric energy into the water in an extremely short time (microsecond level), generating a pulse current of tens of thousands of amperes, which gathers high energy in the channel, generates high temperature, rapidly increases the pressure in the channel, and expands at an extremely high speed. Due to the incompressibility of water, a powerful pressure shock wave is formed, which generates a strong impact force on the scale in the pipeline, thereby achieving the purpose of descaling. High-frequency pulse is a physical method that does not add any chemical agents. It is purely physical and does not destroy the equipment structure or the pipeline. It does not cause pipe bursts. It is safe and environmentally friendly. It can also be combined with chemical agents for further cleaning and maintenance of the pipeline.

[0049] In a specific embodiment of the present invention, it is composed of three major parts: a shell and tube heat exchanger assembly, a pulse generator assembly, and a liquid storage tank assembly.

[0050] Connect the heat exchanger to the pulse descaling device, and the intelligent control system sends a pulse signal to the pulse generator for descaling and cleaning. The first method is that during the cleaning process, according to the pressure difference measured by the pressure tester on the inlet and outlet pipes of the heat exchanger, the intelligent control system sends different pulse signals to the pulse generator. The generator mixes the fluid and high-pressure air flowing into the heat exchanger to form different high-frequency pulses, which can quickly flush and descale the inner wall of the pipe in different ways such as high-frequency oscillation, water hammer effect, spiral ring washing, and microbubble explosion; thereby causing the crystallization of complex salts or anaerobic struvite scale deposited in the tube side and shell side to undergo a series of physical changes such as cracking and peeling, thereby causing various types of dirt to be extremely Fine suspended particles are gradually pulverized and peeled off layer by layer, effectively cleaning the scale within the heat exchanger. A second method utilizes the device's high-voltage transformer and high-voltage rectifier silicon stack to generate a high-voltage DC charging current. An adjustable pulse generator generates an ignition pulse, causing the upper and lower electrodes of the ignition switch to break down and discharge. The cable's discharge head then discharges electricity into the scaled pipe wall in the water, converting electrokinetic force into hydrokinetic force. This electrical energy is discharged into the water in an extremely short time (microseconds), generating a pulse current of tens of thousands of amperes. This high energy accumulates within the channel, generating high temperatures that rapidly increase the pressure within the channel and expand at an extremely high rate. Due to the incompressibility of water, this creates a powerful pressure shock wave that exerts a powerful impact on the scale in the pipe, shattering and dislodging it, achieving the desired cleaning effect. Simultaneously, pressure testers on the heat exchanger's inlet and outlet pipes control the pipe pressure to prevent excessive pressure from the hydroelectric effect, which could cause pipe rupture.

[0051] A liquid reservoir 8 is located at the heat exchanger's fluid outlet. It can be filled with clean water or a cleaning solvent such as citric acid. This provides a water source for the pulse generator 6 and also serves as a circulating water tank. A sight glass is installed at the connection between the liquid reservoir 8 and the heat exchanger's outlet pipe to facilitate observation of the cleaning water's condition. The liquid reservoir 8 also features a dirt collection area for collecting separated scale impurities. Two openings are located at the top of the liquid reservoir 8 for removing scale impurities and adding reagents and water.

[0052] The specific implementation scheme of this embodiment can be found in the relevant descriptions in the above embodiments and will not be repeated here.

[0053] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0054] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is at least two.

[0055] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0056] This innovative pulse descaling device, based on a shell-and-tube heat exchanger, eliminates the need for any chemicals during the descaling process, consumes minimal energy, and offers advantages such as environmental friendliness, ease of operation, high cleaning efficiency, strong adaptability, and low descaling costs. Citric acid can also be added to simultaneously descale, remove rust, and sterilize the pipes.

[0057] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Accordingly, the specification and drawings are to be regarded as illustrative rather than restrictive.

Claims

1. A pulse descaling device based on a shell-and-tube heat exchanger, characterized in that: The device includes a shell and tube heat exchanger, a pulse generator, a liquid storage tank, a first liquid inlet pipe, a second liquid inlet pipe, a third liquid outlet pipe, a second liquid outlet pipe and a first liquid outlet pipe. The inlet of the shell and tube heat exchanger is respectively connected to the first liquid inlet pipe and the second liquid inlet pipe, the outlet of the pulse generator is connected to the inlet of the shell and tube heat exchanger through the first liquid inlet pipe and the second liquid inlet pipe, the outlet of the liquid storage tank is connected to the inlet of the pulse generator through the third liquid outlet pipe, the outlet of the shell and tube heat exchanger is respectively connected to the second liquid outlet pipe and the first liquid outlet pipe, and the outlet of the shell and tube heat exchanger is connected to the inlet of the liquid storage tank through the second liquid outlet pipe and the first liquid outlet pipe.

2. The pulse descaling device based on a shell-and-tube heat exchanger according to claim 1, characterized in that: The device further comprises a visual mirror, which is arranged at the connection between the liquid storage tank and the pipe-in-pipe heat exchanger.

3. The pulse descaling device based on a shell-and-tube heat exchanger according to claim 1, characterized in that: The device further comprises a first pressure tester and a second pressure tester. The first pressure tester is arranged at the outlet pipe connection of the pulse generator; the second pressure tester is arranged at the inlet pipe connection of the liquid storage tank.

4. The pulse descaling device based on a shell-and-tube heat exchanger according to claim 1, characterized in that: The device further comprises a first ball valve, which is arranged at the connection of the outlet pipe of the pulse generator.

5. The pulse descaling device based on a shell-and-tube heat exchanger according to claim 1, characterized in that: The device further comprises an intelligent control electric control box and an air compressor. The intelligent control electric control box is connected to the pulse generator, and the intelligent control electric control box is connected to the air compressor.

6. The pulse descaling device based on a shell-and-tube heat exchanger according to claim 1, characterized in that: The liquid storage tank also includes a liquid storage tank dirt collection area, a liquid storage tank observation port and a drug addition port, and a sampling port. The liquid storage tank dirt collection area is arranged inside the liquid storage tank, the liquid storage tank observation port and the drug addition port is arranged on the top of the liquid storage tank, and the sampling port is arranged on the side of the liquid storage tank.

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