Heat exchanger operation on-line monitoring device for sulfur acid-making process

Abstract

The utility model discloses a heat exchanger operation on-line monitoring device for a sulfur acid-making process. The utility model relates to the technical field of chemical equipment. The online monitoring device comprises a vibration monitor, an alarm and at least two speed sensors or acceleration sensors, the vibration monitor is electrically connected with the speed sensors or the acceleration sensors and the alarm, and the speed sensors or the acceleration sensors are arranged at the joint of the front end socket and the heat exchanger body or on the heat exchanger body through a mounting frame. By means of violent heat release vibration after contact of sulfuric acid and desalted water, the speed sensor or the acceleration sensor is additionally installed on the heat exchanger for real-time monitoring, the alarm is installed, and when the vibration monitor detects that the vibration amplitude transmitted by the speed sensor or the acceleration sensor exceeds the limit, the vibration monitor controls the alarm to give an alarm. Abnormal operation of the heat exchanger can be found in time and treated as soon as possible, the equipment operation period is prolonged, and equipment loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to an on-line monitoring device for the operation of a heat exchanger used in the sulfuric acid production process. Background Art

[0002] In the sulfuric acid production process, a heat exchanger is used to exchange heat between high-temperature sulfuric acid and demineralized water to generate low-pressure steam. The high-temperature sulfuric acid flows through the tube side, and the demineralized water flows through the shell side. During the operation of the heat exchanger, it is prone to perforation and leakage due to the influence of the operating environment and process, and it is not easy to detect or the detection is delayed, resulting in serious damage to the heat exchanger and equipment accidents. Content of the Utility Model

[0003] The purpose of the utility model is to provide an on-line monitoring device for the operation of a heat exchanger used in the sulfuric acid production process, aiming at the above-mentioned deficiencies of the prior art.

[0004] An on-line monitoring device for the operation of a heat exchanger used in the sulfuric acid production process of the utility model includes a vibration monitor, an alarm, and at least two velocity sensors or acceleration sensors. The vibration monitor is electrically connected to the velocity sensors or acceleration sensors and the alarm. The velocity sensors or acceleration sensors are all arranged on the connection between the front head and the heat exchanger body or on the heat exchanger body through mounting brackets.

[0005] Further, the heat exchanger includes a heat exchanger body, an acid inlet and an acid outlet of the front head are arranged on the front head, a water inlet is arranged at the lower part of the tail end of the heat exchanger body, an air outlet is arranged at the top of the middle end of the heat exchanger body. A first connection ring is arranged at the front end of the heat exchanger body, and a second connection ring matching with the first connection ring is arranged on the front head. The first connection ring and the second connection ring are fixedly connected by bolts.

[0006] Further, the velocity sensors or acceleration sensors are all arranged on the first connection ring or the heat exchanger body through mounting brackets.

[0007] Further, the mounting bracket is Π-shaped, two vertical rods are fixed on the first connection ring or the heat exchanger body, and the velocity sensors or acceleration sensors are arranged on the horizontal rod.

[0008] Further, the two vertical rods are welded on the first connection ring or the heat exchanger body.

[0009] Further, mounting holes are arranged on the horizontal rod, and the bottom of the velocity sensors or acceleration sensors is fixed on the mounting holes with screws.

[0010] Further, at least two of the velocity sensors or acceleration sensors are respectively arranged on the first connection ring or the heat exchanger body at intervals through at least two mounting brackets.

[0011] Further, one of the speed sensors or acceleration sensors is disposed on the vertical axis of the cross-section of the first connecting ring or the heat exchanger body, and the other speed sensor or acceleration sensor is disposed on the horizontal axis of the cross-section of the first connecting ring or the heat exchanger body.

[0012] Further, the speed sensor is an electromagnetic speed sensor, and the acceleration sensor is a piezoelectric acceleration sensor.

[0013] The utility model utilizes the intense heat release and vibration after sulfuric acid contacts with demineralized water, monitors in real time by installing a speed sensor or an acceleration sensor on the heat exchanger, and installs an alarm. When the vibration monitor detects that the vibration amplitude transmitted by the speed sensor or the acceleration sensor exceeds the limit, the vibration monitor controls the alarm to alarm, which can timely detect the abnormal operation of the heat exchanger, process it early, realize the extension of the equipment operation cycle, and reduce the equipment loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of an on-line monitoring device for the operation of a heat exchanger used in a sulfuric acid production process according to the utility model;

[0015] Figure 2 is a schematic structural diagram of another embodiment of an on-line monitoring device for the operation of a heat exchanger used in a sulfuric acid production process according to the utility model;

[0016] Figure 3 is a schematic structural diagram of the mounting bracket.

[0017] 1. Heat exchanger body; 11. First connecting ring; 2. Front head; 21. Second connecting ring; 3. Mounting bracket; 4. Vibration monitor; 5. Alarm; 6. Speed sensor or acceleration sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following are specific embodiments of the utility model and in conjunction with the drawings, the technical solutions of the utility model are further described, but the utility model is not limited to these embodiments.

[0019] Embodiment 1

[0020] As Figure 1 shown, an on-line monitoring device for the operation of a heat exchanger used in a sulfuric acid production process according to the utility model includes a vibration monitor 4, an alarm 5, and at least two speed sensors or acceleration sensors 6. The vibration monitor 4 is electrically connected to the speed sensors or acceleration sensors 6 and the alarm 5. The housing of the heat exchanger includes a heat exchanger body 1 and a front head 2. The speed sensors or acceleration sensors 6 are all disposed at the connection between the front head 2 and the heat exchanger body 1 through a mounting bracket 3.

[0021] The utility model utilizes the intense heat release and vibration generated when sulfuric acid contacts with demineralized water. By installing a speed sensor or an acceleration sensor 6 on the heat exchanger for real-time monitoring and installing an alarm 5, when the vibration monitor 4 detects that the vibration amplitude transmitted by the speed sensor or the acceleration sensor 6 exceeds the limit, the vibration monitor 4 controls the alarm 5 to give an alarm, which can timely detect the abnormal operation of the heat exchanger, conduct early treatment, realize the extension of the equipment operation cycle, and reduce the equipment loss.

[0022] The heat exchanger includes a heat exchanger body 1 and a front head 2. The acid inlet and the acid outlet are arranged on the front head 2. The water inlet is arranged at the lower part of the tail end of the heat exchanger body 1, and the gas outlet is arranged at the top of the middle end of the heat exchanger body 1. A first connecting ring 11 is provided at the front end of the heat exchanger body 1, and a second connecting ring 21 matching with the first connecting ring 11 is provided on the front head 2. The first connecting ring 11 and the second connecting ring 21 are fixedly connected by bolts. The speed sensor or the acceleration sensor 6 can be arranged on the first connecting ring 11 through a mounting bracket 3. High-temperature sulfuric acid flows through the tube side, and demineralized water flows through the shell side. If there is a leak point in the tube side, when sulfuric acid contacts with demineralized water, intense heat release and vibration occur, and the first connecting ring 11 drives the speed sensor or the acceleration sensor 6 on the mounting bracket 3 to vibrate.

[0023] As Figure 3 shown, the structure of the mounting bracket 3 can be various. In this embodiment, in order for the mounting bracket 3 to better transmit the vibration to the speed sensor or the acceleration sensor 6, the mounting bracket 3 can be in a Π shape. Two vertical rods are fixedly arranged on the first connecting ring 11, and the speed sensor or the acceleration sensor 6 is arranged on the horizontal rod.

[0024] There are various ways to fixedly arrange the two vertical rods on the first connecting ring 11. In this embodiment, the two vertical rods can be welded to the first connecting ring 11.

[0025] Mounting holes can be provided on the horizontal rod, and the bottom of the speed sensor or the acceleration sensor 6 is fixed on the mounting holes with screws.

[0026] At least two speed sensors or acceleration sensors 6 can be respectively arranged on the first connecting ring 11 at intervals through at least two mounting brackets 3.

[0027] In order to conveniently and accurately monitor the vibration of the heat exchanger, one speed sensor or acceleration sensor 6 can be arranged on the vertical axis of the cross-section of the first connecting ring 11 or the heat exchanger body 1, and the other speed sensor or acceleration sensor 6 can be arranged on the horizontal axis of the cross-section of the first connecting ring 11 or the heat exchanger body 1.

[0028] The speed sensor or acceleration sensor 6 and vibration monitor 4 adopted by the present utility model are both prior arts and can be purchased on the market. For example, the speed sensor can be an electromagnetic speed sensor, and the acceleration sensor can be a piezoelectric acceleration sensor. The vibration monitor 4 can be an HM1012 - B3P vibration monitor 4, etc.

[0029] Embodiment 2

[0030] As Figure 2 shown, the speed sensor or acceleration sensor 6 is both arranged on the heat exchanger body 1 through the mounting bracket 3, and the mounting bracket 3 can be welded to the heat exchanger body 1. One speed sensor or acceleration sensor 6 can be arranged on the vertical axis of the cross - section of the heat exchanger body 1, and the other speed sensor or acceleration sensor 6 is arranged on the horizontal axis of the cross - section of the heat exchanger body 1.

[0031] When the vibration monitor 4 detects that the vibration amplitude transmitted by the speed sensor or acceleration sensor 6 exceeds the limit, the vibration monitor 4 controls the alarm 5 to give an alarm.

[0032] For the parts not involved above, the prior art is applicable.

[0033] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present utility model. Those skilled in the technical field to which the present utility model belongs can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the direction of the present utility model or exceed the scope defined by the appended claims. Those skilled in the art should understand that any modification, equivalent replacement, improvement, etc. made according to the technical essence of the present utility model to the above - mentioned embodiments should be included in the protection scope of the present utility model.

Claims

1. An online monitoring device for heat exchanger operation in a sulfuric acid production process, characterized in that: The heat exchanger comprises a vibration monitor (4), an alarm (5) and at least two velocity sensors or acceleration sensors (6), wherein the vibration monitor (4) is electrically connected to the velocity sensor or acceleration sensor (6) and the alarm (5), and the velocity sensor or acceleration sensor (6) is arranged on the shell of the heat exchanger via a mounting frame (3); The shell of the heat exchanger comprises a heat exchanger body (1) and a front head (2); an acid inlet and an acid outlet are arranged on the front head (2); a water inlet is arranged at the lower part of the rear end of the heat exchanger body (1); and a gas outlet is arranged at the top of the middle end of the heat exchanger body (1); a first connecting ring (11) is arranged at the front end of the heat exchanger body (1); a second connecting ring (21) matching with the first connecting ring (11) is arranged on the front head (2); and the first connecting ring (11) and the second connecting ring (21) are fixed by bolt connection.

2. The on-line monitoring device for operation of a heat exchanger for a sulfuric acid production process according to claim 1, characterized in that: The velocity sensor or acceleration sensor (6) is arranged on the first connecting ring (11) or the heat exchanger body (1) via a mounting frame (3).

3. The on-line monitoring device for heat exchanger operation in sulfuric acid production process according to claim 1, characterized in that: The mounting frame (3) is Π-shaped, and the two vertical rods are fixed on the first connecting ring (11) or the heat exchanger body (1), and the velocity sensor or acceleration sensor (6) is arranged on the horizontal rod.

4. The on-line monitoring device for heat exchanger operation in sulfuric acid production process according to claim 3, characterized in that: The two vertical rods are welded to the first connecting ring (11) or the heat exchanger body (1).

5. The on-line monitoring device for heat exchanger operation in sulfuric acid production process according to claim 3, characterized in that: The horizontal rod is provided with a mounting hole, and the bottom of the velocity sensor or acceleration sensor (6) is fixed to the mounting hole by means of screws.

6. The on-line monitoring device for operation of a heat exchanger used in a sulfuric acid production process according to any one of claims 2 to 5, characterized in that: At least two of the velocity sensors or acceleration sensors (6) are respectively arranged on the first connecting ring (11) or on the heat exchanger body (1) at intervals through at least two mounting frames (3).

7. The on-line monitoring device for operation of a heat exchanger used in a sulfuric acid production process according to claim 6, characterized in that: One of the velocity sensors or acceleration sensors (6) is arranged on the vertical axis of the cross section of the first connecting ring (11) or the heat exchanger body (1), and the other of the velocity sensors or acceleration sensors (6) is arranged on the horizontal axis of the cross section of the first connecting ring (11) or the heat exchanger body (1).

8. The on-line monitoring device for operation of a heat exchanger used in a sulfuric acid production process according to claim 1, characterized in that: The velocity sensor is a magnetoelectric velocity sensor, and the acceleration sensor is a piezoelectric acceleration sensor.

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