Sound wave three-dimensional temperature measurement system for boiler furnace

Abstract

The utility model belongs to the technical field of non-contact measuring devices, and discloses a sound wave three-dimensional temperature measuring system for a boiler furnace. The sound wave three-dimensional temperature measurement system comprises n sound wave temperature measurement and location measurement points, a process control unit and a central processing unit. The n sound wave temperature measurement and location measurement points are all in signal connection with the process control unit; the process control unit is in signal connection with the central processing unit; among the n sound wave temperature and location measuring points, four sound wave temperature and location measuring points are arranged on the top section of a main combustion zone of the boiler furnace, and four sound wave temperature and location measuring points are arranged on the bottom section of the main combustion zone of the boiler furnace. And the rest sound wave temperature and position measuring points are arranged on the cross section of the middle height position of the main combustion area of the boiler furnace. The sound wave three-dimensional temperature measurement system has the advantages of being comprehensive in measurement range, small in number of measurement points and high in economical efficiency, is suitable for three-dimensional temperature field measurement of various boiler hearths, and is high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to non -contact measuring device technical field especially relates to a kind of acoustic wave stereoscopic temperature measurement system for boiler furnace. BACKGROUND

[0002] In the coal-fired boiler of large thermal power plant, the temperature field distribution of furnace gas is an important parameter reflecting the combustion process and equipment state, which not only has very important significance for boiler control and combustion diagnosis, but also directly affects the ignition of pulverized coal and the economy and safety of the boiler. For the furnace with large size, large noise and poor working environment, the temperature field in the furnace is measured by using acoustic wave temperature measurement method.

[0003] The principle of acoustic wave temperature measurement technology is based on the relationship between the propagation speed of acoustic wave in medium and medium, and the medium temperature is calculated by measuring the speed of acoustic wave. Acoustic wave temperature measurement is mainly realized by measuring the distribution of different cross sections in space.

[0004] Most of the current acoustic wave temperature measurement systems can only measure the two-dimensional temperature field of a single cross section of the furnace, and it is difficult to fully grasp the temperature condition of the main combustion zone of the furnace. If the temperature condition of the main combustion zone of the furnace is to be fully grasped, the measurement range can only be increased by adding additional measurement sections. However, the additional measurement sections will greatly increase the measurement cost. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides an acoustic wave stereoscopic temperature measurement system for boiler furnace. The utility model discloses a plurality of acoustic wave temperature measurement sites are arranged on the top section, the middle section and the bottom section of the main combustion zone of the boiler furnace, and the three-dimensional temperature field of the main combustion zone is measured. Due to the staggered arrangement of the measuring points between adjacent cross sections, the number of measuring points is reduced under the same number of measuring points, and the equipment purchase and installation cost is saved.

[0006] The acoustic wave stereoscopic temperature measurement system for boiler furnace of the utility model is realized by the following technical scheme:

[0007] The utility model considers that the existing acoustic wave temperature measurement system is usually a 4-point system or an 8-point system, and the positions of the measuring points are mainly distributed on the same plane, so that the two types of acoustic wave temperature measurement systems can only measure the plane temperature field. Therefore, the utility model provides an acoustic wave stereoscopic temperature measurement system for boiler furnace, and the acoustic wave stereoscopic temperature measurement system of the utility model is constructed based on n measuring points. The n measuring points are arranged on three different planes, and the measuring points on different planes are interacted to measure the three-dimensional temperature field. The acoustic wave stereoscopic temperature measurement system of the utility model specifically includes n acoustic wave temperature measurement sites, a process control unit and a central processing unit.

[0008] In the utility model, n the acoustic wave temperature measurement points are connected with the process control unit, the process control unit is connected with the central processing unit, voltage signals collected by the acoustic wave temperature measurement points are transmitted to the process control unit to calculate the path average temperature, and then are transmitted to the central processing unit to calculate the area average temperature and reconstruct the temperature field.

[0009] In the utility model, n = 4m + 8, and m is an integer greater than or equal to 1.

[0010] In the utility model, the n acoustic wave temperature measurement points are arranged on the top section of the main combustion zone of the boiler furnace, the section at the intermediate height position of the main combustion zone and the bottom section of the main combustion zone, so that the n acoustic wave temperature measurement points are arranged staggeredly between adjacent cross sections, the temperature measurement path is increased, the number of measurement points is reduced, and the equipment purchase and installation cost is saved.

[0011] Moreover, the utility model discloses four acoustic wave temperature measurement points arranged on the top section of the main combustion zone of the boiler furnace, four acoustic wave temperature measurement points arranged on the bottom section of the main combustion zone of the boiler furnace and 4m acoustic wave temperature measurement points arranged on the section at the intermediate height position of the main combustion zone of the boiler furnace, so that the temperature measurement path is effectively increased under the same number of measurement points, the number of measurement points is reduced, and the equipment purchase and installation cost is saved.

[0012] In some preferred embodiments of the utility model, the 4m acoustic wave temperature measurement points arranged on the section at the intermediate height position of the main combustion zone of the boiler furnace are evenly distributed on the four side wall surfaces of the main combustion zone of the boiler furnace, and every m acoustic wave temperature measurement points are arranged on the same side wall surface of the main combustion zone of the boiler furnace, so as to realize the purpose of measuring the cross section temperature distribution at the intermediate height position of the main combustion zone and measuring the three-dimensional temperature field with the eight acoustic wave temperature measurement points at the upper and lower top corners.

[0013] In some preferred embodiments of the utility model, m = 2 and n = 16, that is, the acoustic wave temperature measurement points of the utility model are provided with 16 acoustic wave temperature measurement points.

[0014] In some preferred embodiments of the utility model, the four acoustic wave temperature measurement points arranged on the top section of the main combustion zone of the boiler furnace are arranged on the four top corners of the top section of the main combustion zone of the boiler furnace, so as to realize the purpose of staggered arrangement of the acoustic wave temperature measurement points at the intermediate height position of the main combustion zone and maximum increase of the measurement range.

[0015] In some preferred embodiments of the utility model, four sound wave temperature measurement points arranged on the main combustion zone bottom section of the boiler furnace are arranged respectively on four top corners of the main combustion zone bottom of the boiler furnace, so as to realize the staggered arrangement of the sound wave temperature measurement side points at the intermediate height position of the main combustion zone, thereby maximizing the measurement range.

[0016] In some preferred embodiments of the utility model, each sound wave temperature measurement point comprises a sound wave emission module and a sound wave receiving module; the sound wave emission module is signal connected with the process control unit and is used for emitting a sound wave signal; the sound wave receiving module is signal connected with the process control unit and is used for receiving a sound wave signal.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The sound wave three-dimensional temperature measurement system of the utility model comprises n sound wave temperature measurement points, a process control unit and a central processing unit, the n sound wave temperature measurement points of the utility model are signal connected with the process control unit, and the process control unit is signal connected with the central processing unit, so as to transmit the voltage signal collected by the sound wave temperature measurement point to the process control unit to calculate the path average temperature, and then send to the central processing unit to calculate the area average temperature and reconstruct the temperature field. Moreover, the n sound wave temperature measurement points are arranged respectively on the main combustion zone top section, the section at the intermediate height position of the main combustion zone and the main combustion zone bottom section of the boiler furnace, so that the n sound wave temperature measurement points are distributed on three different planes, the measuring points between different planes are exchanged, and the three-dimensional temperature field is measured. Moreover, the n sound wave temperature measurement points of the utility model are staggered arranged between adjacent cross sections, the temperature measurement path is increased, the number of measuring points is reduced, and the equipment purchase and installation cost is saved.

[0019] Moreover, the utility model discloses four sound wave temperature measurement points arranged on the main combustion zone top section of the boiler furnace, four m sound wave temperature measurement points arranged on the section at the intermediate height position of the main combustion zone of the boiler furnace and four sound wave temperature measurement points arranged on the main combustion zone bottom section of the boiler furnace, so that under the same number of measuring points, the temperature measurement path is effectively increased, the number of measuring points is reduced, and the equipment purchase and installation cost is saved.

[0020] The sound wave three-dimensional temperature measurement system of the utility model has the characteristics of comprehensive measurement range, less number of measuring points and high economy, is suitable for three-dimensional temperature field measurement of various boiler furnaces and has strong practicality. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the schematic view of the measuring point arrangement of the utility model. The dotted line in the drawing is the temperature measurement path.

[0022] Figure 2 It is a structural schematic view of the acoustic wave three-dimensional temperature measurement system of the utility model.

[0023] Figure 3 It is a structural schematic view of the acoustic wave temperature measurement point of the utility model.

[0024] Figures 1-3 The reference signs in the drawings are:

[0025] 1-acoustic wave temperature measurement point, 11-acoustic wave receiving module, 12-acoustic wave receiving module.

[0026] 2-process control unit.

[0027] 3-central processing unit.

[0028] 4-main combustion zone of boiler furnace. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiment of the utility model will be described clearly and completely below.

[0030] Embodiment 1

[0031] The embodiment provides an acoustic wave three-dimensional temperature measurement system for boiler furnace, and the acoustic wave three-dimensional temperature measurement system of the embodiment comprises n acoustic wave temperature measurement points 1, a process control unit 2 and a central processing unit 3.

[0032] Please refer to Figure 2 The n acoustic wave temperature measurement points 1 of the embodiment are all connected with the process control unit 2 in signal, the process control unit 2 is connected with the central processing unit 3 in signal, so that the voltage signal collected by the acoustic wave temperature measurement point is transmitted to the process control unit 2 to calculate the path average temperature, and then is sent to the central processing unit 3 to calculate the area average temperature and reconstruct the temperature field.

[0033] In the embodiment, n=4m+8, and m is an integer greater than or equal to 1.

[0034] And in the embodiment, the n acoustic wave temperature measurement points 1 are respectively arranged on three different horizontal planes by the following manner, so as to measure the three-dimensional temperature field by the point interaction between different planes:

[0035] In the embodiment, four acoustic wave temperature measurement points 1 are arranged on the top section of the main combustion zone 4 of the boiler furnace, and the four acoustic wave temperature measurement points 1 are arranged on the four top corners of the top of the main combustion zone 4 of the boiler furnace respectively.

[0036] In the embodiment, 4m acoustic wave temperature measurement points 1 are arranged on the section of the middle height position of the main combustion area 4 of the boiler furnace, and the 4m acoustic wave temperature measurement points 1 are uniformly distributed on the four side wall surfaces of the main combustion area 4 of the boiler furnace, and each m acoustic wave temperature measurement point is arranged on the same side wall surface of the main combustion area 4 of the boiler furnace.

[0037] In the embodiment, 4 acoustic wave temperature measurement points 1 are arranged on the section of the bottom of the main combustion area 4 of the boiler furnace, and the 4 acoustic wave temperature measurement points 1 are arranged on the four top corners of the bottom of the main combustion area 4 of the boiler furnace, so that the temperature measurement path is effectively increased under the same number of measurement points, thereby reducing the number of measurement points and saving the equipment purchase and installation cost.

[0038] Please refer to Figure 3 In the embodiment, each acoustic wave temperature measurement point 1 comprises an acoustic wave emission module 11 and an acoustic wave receiving module 12.

[0039] The acoustic wave emission module 11 of the embodiment is signal connected with the process control unit 2, and is used for emitting an acoustic wave signal.

[0040] The acoustic wave receiving module 12 is signal connected with the process control unit 2, and is used for receiving an acoustic wave signal.

[0041] In a preferred embodiment of the utility model, the signal connection is realized through data line electrical connection.

[0042] In a preferred embodiment of the utility model, m=2, n=16, that is, the acoustic wave temperature measurement point 1 of the embodiment is provided with 16, and the setting structure diagram is as shown in Figure 1 .

[0043] From Figure 1 It can be seen that the 16 acoustic wave temperature measurement points 1 in the embodiment are arranged on the section of the top of the main combustion area of the boiler furnace, the section of the middle height position of the main combustion area and the section of the bottom of the main combustion area, so that the measurement points of the 16 acoustic wave temperature measurement points are arranged in a staggered manner between adjacent cross sections, the temperature measurement path is increased, thereby reducing the number of measurement points and saving the equipment purchase and installation cost.

[0044] Moreover, the utility model discloses 4 acoustic wave temperature measurement points on the section of the top of the main combustion area of the boiler furnace, 4 acoustic wave temperature measurement points on the section of the bottom of the main combustion area of the boiler furnace and 8 acoustic wave temperature measurement points on the section of the middle height position of the main combustion area of the boiler furnace, so that the temperature measurement path is effectively increased under the same number of measurement points, thereby reducing the number of measurement points and saving the equipment purchase and installation cost.

[0045] It should be noted that when the acoustic stereoscopic temperature measurement system of the embodiment is used to measure the temperature field in the furnace, the acoustic emission module 11 in the 16 acoustic temperature measurement points 1 is controlled by the process control unit 2 to emit acoustic signals regularly and in turn. These acoustic signals propagate inside the furnace and change their propagation speed when encountering gas media of different temperatures. The acoustic receiving module 12 is responsible for receiving these propagated acoustic signals emitted by other acoustic temperature measurement points 1 and converting them into voltage signals. The received voltage signals are transmitted to the process control unit 2 through the data line. The process control unit 2 calculates the average temperature on each acoustic propagation path according to the propagation time of the acoustic signal and the known propagation speed-temperature relationship. The process control unit 2 sends the calculated path average temperature data to the central processing unit 3. The central processing unit 3 processes and analyzes these data using its own preset algorithm and mathematical model, calculates the average temperature of each region in the furnace, and reconstructs the stereoscopic temperature field in the furnace accordingly. The specific working principle of the central processing unit 3 is known to those skilled in the art, and therefore will not be described in detail in the present application.

[0046] Obviously, the above-mentioned embodiments are only part of the embodiments of the present application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

Claims

1. An acoustic stereotemperature system for a boiler furnace, characterized in that, It comprises n acoustic temperature measurement points (1), a process control unit (2) and a central processing unit (3); n acoustic temperature measurement points (1) are signal connected with the process control unit (2); The process control unit (2) is signal connected with the central processing unit (3); Wherein, n = 4m + 8, and m is an integer greater than or equal to 1; 4 of the n acoustic temperature measurement points (1) are arranged on the top section of the main combustion zone (4) of the boiler furnace; 4 of the n acoustic temperature measurement points (1) are arranged on the bottom section of the main combustion zone (4) of the boiler furnace; The remaining 4m acoustic temperature measurement points (1) are evenly distributed on the section at the middle height position of the main combustion zone (4) of the boiler furnace.

2. The acoustic stereotemperatures system for a boiler furnace as claimed in claim 1, wherein, The 4m acoustic temperature measurement points (1) arranged on the section at the middle height position of the main combustion zone (4) of the boiler furnace are evenly distributed on the four side wall surfaces of the main combustion zone (4) of the boiler furnace; And every m acoustic temperature measurement points (1) are arranged on the same side wall surface of the main combustion zone (4) of the boiler furnace.

3. The acoustic stereotemperatures system for a boiler furnace as claimed in claim 1, wherein, m = 2, n = 16.

4. The acoustic stereotemperatures system for a boiler furnace as claimed in claim 1, wherein, The 4 acoustic temperature measurement points (1) arranged on the top section of the main combustion zone (4) of the boiler furnace are respectively arranged on the 4 top corners of the top of the main combustion zone (4) of the boiler furnace.

5. The acoustic stereotemperatures system for a boiler furnace as claimed in claim 1, wherein, The 4 acoustic temperature measurement points (1) arranged on the bottom section of the main combustion zone (4) of the boiler furnace are respectively arranged on the 4 top corners of the bottom of the main combustion zone (4) of the boiler furnace.

6. The acoustic stereotemperatures system for a boiler furnace as claimed in claim 1, wherein, Each of the acoustic temperature measurement points (1) comprises an acoustic wave emission module (11) and an acoustic wave receiving module (12); The acoustic wave emission module (11) is signal connected with the process control unit (2); The acoustic wave receiving module (12) is signal connected with the process control unit (2).

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