Fixed device for on-line measurement of pipe wall thickness of water cooling pipe of hazardous waste waste heat boiler

Abstract

The utility model discloses a fixed device for measuring the pipe wall thickness of a water cooling pipe of a hazardous waste waste heat boiler on line, and belongs to the technical field of fixed pipeline wall thickness measuring devices. The device is composed of a probe water cooling sleeve, a probe protection sleeve, a probe connecting line, an ultrasonic thickness gauge probe and an ultrasonic thickness gauge, the ultrasonic thickness gauge probe and the probe connecting line are arranged in the probe protection sleeve, and the probe protection sleeve is arranged in the probe water cooling sleeve; one end of the probe water-cooling sleeve is welded to the inner side of the waste heat boiler wall, the other end of the probe water-cooling sleeve and the probe protection sleeve are welded to the outer wall of the waste heat boiler water-cooling pipe, the ultrasonic thickness gauge probe is tightly attached to the outer wall of the waste heat boiler water-cooling pipe, and a detection signal is transmitted to the ultrasonic thickness gauge through the probe connecting wire. And the wall thickness data of the water-cooled pipe is displayed through a digital display of the ultrasonic thickness gauge. According to the utility model, the thickness of the pipe wall of the water-cooled pipe can be accurately measured in real time, and when the pipe wall is about to be broken, the pipe wall can be predicted in advance, and an emergency means can be adopted.

Description

Technical Field

[0001] The utility model belongs to the technical field of fixed pipe wall thickness measuring devices, and in particular relates to a fixed online device for measuring the wall thickness of a water cooling pipe of a hazardous waste waste heat boiler. Background Art

[0002] Waste heat boilers are energy conversion devices. Waste heat boilers used in hazardous waste incineration facilities are boilers that use the heat of high-temperature exhaust gas generated during the incineration of hazardous waste to generate steam. Many hazardous wastes contain elements such as sulfur, chlorine, and bromine, which form corrosive gases such as sulfides, chlorides, and bromides after high-temperature combustion. These gases first pass through the waste heat boiler and collide with the water-cooling pipe wall of the waste heat boiler. As time goes by, the water-cooling pipe wall is corroded more and more seriously, and there is a risk of pipe wall rupture and equipment failure at any time.

[0003] With the development of industrial technology, the detection methods of metal thickness are also constantly improving, and the detection capabilities are also constantly improving. Since the development of metal thickness detection technology, ultrasonic thickness measurement is the most common and efficient method for measuring the wall thickness of metal pipes. However, the wall thickness measurement technology of metal pipes is mainly temporary on-site measurement, and there are few measurement methods for online monitoring, and even fewer methods involving real-time monitoring under high temperature conditions. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned deficiencies existing in the prior art, and a fixed online device for measuring the wall thickness of the water-cooling pipe of the waste heat boiler of hazardous waste is proposed. During the operation of the incineration disposal facility, the flue gas continuously passes through the waste heat boiler and collides with the wall of the water-cooling pipe in the waste heat boiler. During the continuous collision, the corrosive gas in the flue gas continuously corrodes the wall of the water-cooling pipe. The fixed device for measuring the wall thickness of the water-cooling pipe of the waste heat boiler described in the utility model is installed on the outer wall of the water-cooling pipe of the waste heat boiler to monitor the wall thickness of the water-cooling pipe of the waste heat boiler in real time.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A fixed online device for measuring the wall thickness of a water-cooling pipe of a waste heat boiler for hazardous wastes, comprising a probe water-cooling sleeve, a probe protection sleeve, a probe connecting line, an ultrasonic thickness gauge probe, and an ultrasonic thickness gauge. The ultrasonic thickness gauge probe and the probe connecting line are placed in the probe protection sleeve, and the probe protection sleeve is placed in the probe water-cooling sleeve; one end of the probe water-cooling sleeve is welded to the inner side of the waste heat boiler wall, the other end of the probe water-cooling sleeve and the probe protection sleeve are welded to the outer wall of the waste heat boiler water-cooling pipe, and the ultrasonic thickness gauge probe is attached to the probe protection sleeve. It is tightly installed on the outer wall of the water-cooling pipe of the waste heat boiler. The detection signal is transmitted to the ultrasonic thickness gauge through the probe connecting line. The wall thickness data of the water-cooling pipe is displayed on the digital display of the ultrasonic thickness gauge. The probe water-cooling sleeve is provided with a three-way water outlet near the ultrasonic thickness gauge probe. When in use, cold water (the cold water temperature is between 0 and 30°C) is injected into the probe water-cooling sleeve outside the waste heat boiler to cool the ultrasonic thickness gauge probe and the probe connecting line. The cold water flows out of the waste heat boiler through the water outlet and is recycled.

[0007] Preferably, the ultrasonic thickness gauge probe adopts a high-precision high-temperature resistant probe (high temperature resistant above 350°C), including but not limited to a GT model ultrasonic thickness gauge probe; the probe connecting wire includes but is not limited to an all-copper coaxial or all-copper double silver-plated connecting wire.

[0008] Preferably, the probe cold water jacket adopts a high temperature resistant and corrosion resistant seamless pipe, and the materials used include but are not limited to 20# steel, Q345 low alloy steel, and Q235 low alloy steel.

[0009] Furthermore, the material of the probe water-cooling sleeve is 20# steel, Q345 low alloy steel or Q235 low alloy steel.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] In the utility model, the probe of the ultrasonic thickness gauge is connected to the outer wall of the waste heat boiler water cooling pipe, so as to monitor the thickness of the water cooling pipe wall of the waste heat boiler in real time. When the staff inspects the equipment, they observe and record the measured values ​​of the thickness of the water cooling pipe wall. When the thickness of the water cooling pipe wall reaches the critical point of rupture, emergency measures can be taken in time.

[0012] In summary, the utility model can accurately measure the thickness of the wall of the water-cooling pipe, can measure the wall of the water-cooling pipe in real time, can predict in advance when the wall is about to break, and take emergency measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the device of the utility model;

[0014] The names of the various parts are: probe water cooling sleeve 1, probe protection sleeve 2, probe connecting wire 3, ultrasonic thickness gauge probe 4, ultrasonic thickness gauge 5, water cooling pipe 6, waste heat boiler wall 7.

[0015] The probe connecting line 3 and the ultrasonic thickness gauge probe 4 are placed in the probe protection sleeve 2, and then both ends of the probe protection sleeve 2 are sealed to prevent cold water from entering. DETAILED DESCRIPTION

[0016] Example 1

[0017] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] The utility model discloses a fixed online device for measuring the wall thickness of the water-cooling pipe of a waste heat boiler for hazardous waste. Before use, two circular openings (one for water inlet and one for water outlet) exactly the same as the outer diameter of the probe water-cooling sleeve 1 are opened on the outer wall 7 of the waste heat boiler. The probe protection sleeve 2 is inserted into the probe water-cooling sleeve 1. The probe protection sleeve 2 and the probe water-cooling sleeve 1 are inserted into the circular openings and placed inside the waste heat boiler and welded to the outer wall of the water-cooling pipe 6 in the waste heat boiler. The ultrasonic thickness gauge probe 4 is connected to the ultrasonic thickness gauge 5 through the probe connecting line 3. The digital display of the ultrasonic thickness gauge 5 is fixedly placed on the outer wall 7 of the waste heat boiler so that the staff can conveniently check the height position during inspection. When in use, the probe water-cooling sleeve 1 is filled with cold water (the cold water is only filled into the probe water-cooling sleeve 1 and does not enter the probe protection sleeve 2) for cooling circulation to cool down the ultrasonic thickness gauge probe 4.

[0019] In some embodiments of the utility model, the ultrasonic thickness gauge measures the thickness of an object by the ultrasonic propagation characteristics. The ultrasonic thickness gauge probe 4 emits a pulse, and the pulse passes through the measured pipe wall. When it reaches the dividing line of the pipe wall (the inner and outer walls of the pipe can be regarded as two parallel planes, and the thickness of the pipe wall is the distance between the two parallel planes. The ultrasonic thickness gauge probe 4 emits a pulse in the direction of another plane from the connected plane, and the pulse is reflected after colliding with another plane), it is reflected back to the ultrasonic thickness gauge probe 4. The ultrasonic thickness gauge 5 calculates the wall thickness of the water-cooling pipe 6 based on the time difference between the emission and reception of the ultrasonic thickness gauge probe 4 and displays it on the digital display of the ultrasonic thickness gauge 5. The wall thickness of the water-cooling pipe 6 that has not been put into use is 4mm. When the measured wall thickness of the water-cooling pipe 6 is ≤0.8mm, the hazardous waste incineration disposal facility should be stopped immediately, and the water-cooling pipe 6 should be replaced after the temperature in the waste heat boiler drops to room temperature.

[0020] In some embodiments of the utility model, the probe water cooling sleeve 1 is a seamless steel pipe with a diameter of DN80, a thickness of 5mm, and a model of 20# steel; the probe protection sleeve 2 is a seamless steel pipe with a diameter of DN15, a thickness of 5mm, and a model of 20# steel. The probe water cooling sleeve 1 and the probe protection sleeve 2 are welded to the outer wall of the waste heat boiler water cooling pipe 6.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent replacements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixed online device for measuring the wall thickness of water cooling pipes of waste heat boilers for hazardous wastes, characterized in that: The ultrasonic thickness gauge comprises a probe water cooling sleeve (1), a probe protection sleeve (2), a probe connecting line (3), an ultrasonic thickness gauge probe (4), and an ultrasonic thickness gauge (5). The ultrasonic thickness gauge probe (4) and the probe connecting line (3) are placed in the probe protection sleeve (2), and the probe protection sleeve (2) is placed in the probe water cooling sleeve (1); one end of the probe water cooling sleeve (1) is welded to the inner side of the waste heat boiler wall (7), the other end of the probe water cooling sleeve (1) and the probe protection sleeve (2) are welded to the outer wall of the waste heat boiler water cooling pipe (6), and the ultrasonic thickness gauge probe (5) is welded to the inner side of the waste heat boiler wall (7). The head (4) is closely arranged on the outer wall of the water-cooling pipe (6) of the waste heat boiler, and the detection signal is transmitted to the ultrasonic thickness gauge (5) through the probe connecting line (3), and the wall thickness data of the water-cooling pipe (6) is displayed on the digital display of the ultrasonic thickness gauge; the probe water-cooling sleeve (1) is provided with a water outlet of a three-way structure at a position close to the ultrasonic thickness gauge probe (4), and when in use, cold water is injected into the probe water-cooling sleeve (1) outside the waste heat boiler to cool the ultrasonic thickness gauge probe (4) and the probe connecting line (3), and the cold water flows out of the waste heat boiler through the water outlet and is circulated for use.

2. A fixed online device for measuring the wall thickness of a water cooling pipe of a waste heat boiler for hazardous waste as claimed in claim 1, characterized in that: The ultrasonic thickness gauge probe (4) is a GT model ultrasonic thickness gauge probe; the probe connecting wire (3) is an all-copper coaxial or all-copper double silver-plated connecting wire.

3. A fixed online device for measuring the wall thickness of a water cooling pipe of a hazardous waste waste heat boiler as claimed in claim 1, characterized in that: The material of the probe water cooling sleeve (1) is 20# steel, Q345 low alloy steel or Q235 low alloy steel.

4. A fixed online device for measuring the wall thickness of a water cooling pipe of a hazardous waste waste heat boiler as claimed in claim 1, characterized in that: The probe water cooling sleeve (1) is a seamless steel pipe with a diameter of DN80, a thickness of 5 mm, and a 20# steel material; the probe protection sleeve (2) is a seamless steel pipe with a diameter of DN15, a thickness of 5 mm, and a 20# steel material.

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