Corrosion rate detection device for heat exchangers

Abstract

This utility model belongs to the technical field of heat exchanger devices, specifically relating to a heat exchanger corrosion rate detection device. It includes a heat exchanger with a shell, inside which are arranged several heat exchange pipes, forming a heat exchange cavity between the pipes and the shell. A raw liquid tank, an acid pipe, and an alkali pipe are connected to the top of the heat exchanger. An ion concentration detector is connected to the bottom of the heat exchanger. A transfer pump is installed between the heat exchanger and the ion concentration detector. A hot water pipe is located on the side of the heat exchanger, communicating with the heat exchange cavity, which is connected to another ion concentration detector. Both ion concentration detectors are electrically connected to a controller. This utility model detects changes in ion concentration on the inner and outer sides of the heat exchanger, converting them into electrical signals. The magnitude of the ion concentration accurately determines the rate and extent of corrosion of the heat exchanger, significantly improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat exchanger devices, specifically relating to a heat exchanger corrosion rate detection device. Background Technology

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers are common equipment in many industrial sectors, including chemical, petroleum, power, food, and others, and play an important role in production. However, heat exchangers are susceptible to corrosion from the heat exchange solution and the heat exchange water during use. A heat exchanger corrosion rate detection device is a key tool for assessing heat exchanger material loss and ensuring the safe operation of the equipment.

[0003] Currently, industrial production widely employs corrosion monitoring and detection technologies, including circulating water quality analysis, manual fixed-point thickness measurement, online corrosion probe systems, media analysis of oil and water, and corrosion inspection during shutdowns. However, existing detection devices suffer from problems such as complex structure, cumbersome operation, and high construction requirements. Therefore, a device that can quickly and accurately detect the corrosion rate of heat exchangers is needed. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a heat exchanger corrosion rate detection device to achieve accurate detection of the corrosion rate of the heat exchanger and facilitate the use of the heat exchanger during construction.

[0005] The technical solution adopted by this utility model to solve its technical problem is: The heat exchanger corrosion rate detection device of this utility model includes a heat exchanger, which includes a shell and a plurality of heat exchange pipes arranged inside the shell. A heat exchange cavity is formed between the heat exchange pipes and the shell. A raw liquid tank, an acid liquid pipe and an alkali liquid pipe are connected to the top of the heat exchanger. An ion concentration detector is connected to the bottom of the heat exchanger. A transfer pump is arranged between the heat exchanger and the ion concentration detector. A hot water pipe is arranged on the side of the heat exchanger and is connected to the heat exchange cavity. The heat exchange cavity is connected to an ion concentration detector. Both the ion concentration detector and the ion concentration detector are electrically connected to a controller.

[0006] in: The outer shell has a slot inside, and the heat exchange pipe is inserted into the slot.

[0007] The outer shell and heat exchange pipes are both made of stainless steel.

[0008] The acid and alkali pipelines are equipped with acid valves and alkali valves respectively. A main control valve and a pH detector are installed on the top of the heat exchanger, with the pH detector located above the main control valve.

[0009] The controller is electrically connected to the acid valve, the alkali valve, and the main control valve.

[0010] The raw material tank is equipped with a jacket on the outside, with an inlet at the top and an outlet at the bottom.

[0011] The water inlet is equipped with a circulating water valve, and the controller is electrically connected to the circulating water valve.

[0012] The heat exchanger is equipped with a temperature sensor.

[0013] The heat exchange cavity is provided with a heat exchange outlet at the bottom, which is connected to the second ion concentration detector.

[0014] The bottom of each of the aforementioned heat exchange pipes is connected to a delivery pump.

[0015] The beneficial effects of this utility model are: This invention detects changes in ion concentration on the inner and outer sides of a heat exchanger and converts these changes into electrical signals. The rate and extent of corrosion of the heat exchanger can be accurately determined by the magnitude of the ion concentration. Furthermore, by altering the concentration and pH value of the raw solution during the detection process, the corrosion rate of the heat exchanger under different environments can be tested. By detecting the hot water in the heat exchange cavity, the rate at which through-holes are corroded on the heat exchange pipes can be promptly detected. Combined with the detection of the corrosion rate of the heat exchange pipes, this allows for precise monitoring of the heat exchanger's usage during production, significantly improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the heat exchanger of this utility model; In the diagram: 1. Heat exchanger; 2. Heat exchange pipe; 3. Outer shell; 4. Alkali pipe; 5. Acid pipe; 6. Raw material tank; 7. Hot water pipe; 8. Heat exchange outlet; 9. Controller; 10. Transfer pump; 11. Jacket; 101. Main control valve; 102. Temperature sensor; 103. pH detector; 401. Alkali valve; 501. Acid valve; 801. Ion concentration detector II; 1001. Ion concentration detector I; 1101. Circulating water valve. Detailed Implementation

[0017] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0018] Example 1 like Figure 1-2As shown, the heat exchanger corrosion rate detection device of this utility model includes a heat exchanger 1, which includes a shell 3. Several heat exchange pipes 2 are arranged inside the shell 3, and a heat exchange cavity is formed between the heat exchange pipes 2 and the shell 3. The top of the heat exchanger 1 is connected to a raw liquid tank 6, an acid liquid pipe 5, and an alkali liquid pipe 4. The bottom of the heat exchanger 1 is connected to an ion concentration detector 1001. A transfer pump 10 is arranged between the heat exchanger 1 and the ion concentration detector 1001. A hot water pipe 7 is arranged on the side of the heat exchanger 1, which is connected to the heat exchange cavity. The heat exchange cavity is connected to an ion concentration detector 801. Both the ion concentration detector 1001 and the ion concentration detector 801 are electrically connected to a controller 9.

[0019] The outer casing 3 has a slot inside, and the heat exchange pipe 2 is inserted into the slot.

[0020] Both the outer shell 3 and the heat exchange pipe 2 are made of stainless steel.

[0021] Acid valve 501 and alkali valve 401 are respectively installed on acid pipe 5 and alkali pipe 4. A main control valve 101 and pH detector 103 are installed on the top of heat exchanger 1. The pH detector 103 is located above the main control valve 101.

[0022] The controller 9 is electrically connected to the acid valve 501, the alkali valve 401 and the main control valve 101.

[0023] The outer side of the raw liquid tank 6 is provided with a jacket 11, with an inlet at the upper part of the jacket 11 and an outlet at the lower part of the jacket 11.

[0024] A circulating water valve 1101 is installed on the water inlet, and the controller 9 is electrically connected to the circulating water valve 1101.

[0025] A temperature sensor 102 is installed on the heat exchanger 1.

[0026] A heat exchange outlet 8 is provided at the bottom of the heat exchange cavity, and the heat exchange outlet 8 is connected to the ion concentration detector 2801.

[0027] Several heat exchange pipes 2 are connected to a transfer pump 10 at their bottom.

[0028] Working principle and process: Solutions at different temperatures and with different pH values ​​are delivered to heat exchanger 1. When the ion concentration detector 1001 detects the presence of ferric ions and the solution concentration differs from the original solution, it indicates that corrosion has occurred inside heat exchanger 1. By observing the change in the ferric ion concentration in the ion concentration detector 1001 over time, the corrosion rate inside the heat exchanger can be obtained. The material flow rate in heat exchange pipe 2 is adjusted by adjusting the extraction rate of the delivery pump 10, and the relationship between the corrosion rate and the material flow rate is observed. By controlling the amount of acid and alkali added in acid pipe 5 and alkali pipe 4, tests are conducted to observe the effect of pH value changes on the corrosion rate.

[0029] Subsequently, the ion concentration in the heat exchange water in the heat exchange cavity was detected by ion concentration detector 2801. The time of appearance of different ions in the heat exchange water and the fluctuation of pH value were observed. When ferric ions appeared in the heat exchange water and the pH value suddenly increased or decreased, it proved that the heat exchange pipe 2 had been corroded into a through hole. The time of corrosion process was recorded. Then, the operation was repeated with another set of the same heat exchange pipe 2.

Claims

1. A heat exchanger corrosion rate detection device, comprising a heat exchanger (1), characterized in that, The heat exchanger (1) includes a shell (3), and several heat exchange pipes (2) are provided inside the shell (3). A heat exchange cavity is formed between the heat exchange pipes (2) and the shell (3). The top of the heat exchanger (1) is connected to a raw liquid tank (6), an acid liquid pipe (5) and an alkali liquid pipe (4). The bottom of the heat exchanger (1) is connected to an ion concentration detector (1001). A transfer pump (10) is provided between the heat exchanger (1) and the ion concentration detector (1001). A hot water pipe (7) is provided on the side of the heat exchanger (1). The hot water pipe (7) is connected to the heat exchange cavity. The heat exchange cavity is connected to an ion concentration detector (801). Both the ion concentration detector (1001) and the ion concentration detector (801) are electrically connected to a controller (9).

2. The heat exchanger corrosion rate detection device according to claim 1, characterized in that, The outer shell (3) has a slot inside, and the heat exchange pipe (2) is installed inside the slot.

3. The heat exchanger corrosion rate detection device according to claim 1, characterized in that, The outer shell (3) and the heat exchange pipe (2) are both made of stainless steel.

4. The heat exchanger corrosion rate detection device according to claim 1, characterized in that, Acid valve (501) and alkali valve (401) are respectively installed on acid pipe (5) and alkali pipe (4). A main control valve (101) and pH detector (103) are installed on the top of heat exchanger (1). The pH detector (103) is located above the main control valve (101).

5. The heat exchanger corrosion rate detection device according to claim 4, characterized in that, The controller (9) is electrically connected to the acid valve (501), the alkali valve (401) and the main control valve (101).

6. The heat exchanger corrosion rate detection device according to claim 1, characterized in that, The outer side of the raw liquid tank (6) is provided with a jacket (11), the upper part of the jacket (11) is provided with a water inlet, and the lower part of the jacket (11) is provided with a water outlet.

7. The heat exchanger corrosion rate detection device according to claim 6, characterized in that, A circulating water valve (1101) is installed on the water inlet, and the controller (9) is electrically connected to the circulating water valve (1101).

8. The heat exchanger corrosion rate detection device according to claim 1, characterized in that, A temperature sensor (102) is installed on the heat exchanger (1).

9. The heat exchanger corrosion rate detection device according to claim 1, characterized in that, A heat exchange outlet (8) is provided at the bottom of the heat exchange cavity, and the heat exchange outlet (8) is connected to the second ion concentration detector (801).

10. The heat exchanger corrosion rate detection device according to claim 1, characterized in that, Several heat exchange pipes (2) are connected to a transfer pump (10) at the bottom.

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