Boiler furnace temperature measuring method and temperature measuring device

Abstract

The invention provides a boiler furnace temperature measuring method and device, the effect is optimal by adopting a pneumatic sound source, a sound wave transmitting / receiving integrated structure, 8 transmitting and 8 receiving and 24 sound wave paths in total, the reconstruction precision of a temperature field is determined by the number of path temperature projections, that is, the more the path temperature projections are, the higher the precision of the reconstructed temperature field is, and the higher the reconstruction precision is. The actual temperature measurement requirement can be met only by arranging eight monitoring devices and arranging sound wave transmitting / receiving together, installation is convenient and fast, meanwhile, the fixing mechanism and the cleaning mechanism are arranged, the sound production and sound wave collector can be rapidly fixed through the arrangement, the installation efficiency is improved, and the installation cost is reduced. Through the arrangement, the probe of the sound production and sound wave collector is automatically cleaned, particle attachment is prevented, and the authenticity of detection is ensured.

Description

Technical Field

[0001] The invention relates to the field related to boiler furnace temperature measurement technology, and in particular to a boiler furnace temperature measurement method and a temperature measurement device. Background Art

[0002] Flue gas is a special medium with a general temperature range of 100-1300℃, and may reach higher temperatures under special circumstances. In addition, flue gas generally contains dust and acidic gases. How to overcome high temperature, high dust and acidic substances to ensure online monitoring of flue gas flow rate is a very difficult problem.

[0003] For example, the document with the publication number CN102830245A discloses a boiler furnace flue gas velocity monitoring system and monitoring method based on acoustics. On the inner wall of one side of the furnace where the flue gas flows, a measuring point is evenly set every 4-6 meters, and a monitoring device is installed at each measuring point; the structure of the monitoring device is: the acoustic wave transceiver composed of an acoustic waveguide, an acoustic wave generator and an electret microphone is arranged at the measuring point; the acoustic wave generator is connected to a power amplifier, and the power amplifier is connected to the output end of the junction box; the electret microphone is connected to a signal conditioner, and the signal conditioner is connected to the input end of the junction box; the junction box is connected to a dual-channel data acquisition card, and the dual-channel data acquisition card is connected to an industrial computer. The use of multi-point sampling can overcome the problem of unstable flue gas flow and uneven distribution of flow velocity in the flue, which makes the flue gas measurement inaccurate. It is not limited by the harsh environment such as high temperature, corrosion, and dust in the furnace, and truly reflects the flue gas flow velocity in the furnace, with fast response and wide measurement range.

[0004] However, the arrangement as described above requires the installation of multiple groups of monitoring devices, but the sound wave transmitter / receiver are separately arranged, which not only wastes a lot of financial resources, but also requires a lot of time during the installation process. At the same time, when the sound wave transmitter / receiver is used separately, the end will be affected by the particles in the furnace and attached to them, which can easily affect the reception and generation effect, thereby easily causing inaccurate detection and affecting the authenticity of the result data, which is not conducive to promotion and application. Summary of the invention

[0005] In order to solve the above technical problems, the object of the present invention is to provide a boiler furnace temperature measurement method and temperature measurement device.

[0006] Based on this, the present invention provides the following technical solution: a method for measuring the temperature of a boiler furnace, the specific method is as follows:

[0007] Step S1: First, eight sets of temperature measuring devices are installed at the front end, left end, rear end and right end of the furnace in pairs, and fixed;

[0008] Step S2: Setting up a sound generation and sound wave collection system, each sound generation and sound wave collection system has both the function of transmitting and receiving sound waves;

[0009] Step S3: using 0.5 MPa instrument gas from the boiler, a white noise with a specific bandwidth is emitted through a sound generating device;

[0010] Step S4: 8 sets of sound generation and sound wave collection systems are evenly distributed on the four walls of the same horizontal plane of the boiler, forming 8 transmitters and 8 receivers, with a total of 24 sound wave paths. The temperature measurement operation method of the sound wave path adopts the cross-correlation method, the sampling frequency is 200KHz, the temperature projection uniformity is good, and the temperature field formed on this basis has high accuracy;

[0011] Step S5: The square of the propagation speed of the sound wave in the gas is proportional to the gas temperature in its transmission path, that is, The average temperature of the propagation path in the boiler furnace is measured through the sound generation and sound wave acquisition system. According to the different sound wave path temperature diagrams formed by different boilers, the temperature field reconstruction algorithm and tomography technology based on Gaussian function and regularization method are used to reconstruct the temperature field under less temperature projection conditions and display the temperature distribution state and other related information online in real time. The temperature field is reconstructed under temperature projection conditions and the temperature distribution state of the measuring surface is displayed online in real time and quantitatively on the display.

[0012] A boiler furnace temperature measuring device comprises a furnace body and a temperature measuring device, wherein the temperature measuring device is provided with eight groups, and two of the temperature measuring devices are installed on the front end, left end, rear end and right end of the furnace body respectively, and the temperature measuring device comprises a mounting block, a sound generator and a sound wave collector, a solenoid valve, a compressed air box, a piezoelectric sound wave sensor, a preamplifier, a fixing member, a fixing mechanism and a cleaning mechanism, wherein the mounting block is arranged at the left end of the furnace body, the sound generator and the sound wave collector are arranged at the left end of the mounting block, and penetrate the mounting block to the right and are arranged inside the furnace body, and the The solenoid valve is arranged at the bottom end of the sound generator and sound wave collector, and the bottom end of the solenoid valve is connected with the compressed air box, and the compressed air box is arranged at the left end of the furnace body through a connecting plate, the piezoelectric sound wave sensor is installed at the bottom end of the sound generator and sound wave collector, and the bottom end of the piezoelectric sound wave sensor is connected with the preamplifier, and the preamplifier is arranged at the left end of the furnace body through a connecting plate, the fixing part is fixed to the outside of the sound generator and sound wave collector, the fixing mechanism is arranged inside the mounting block, and the cleaning mechanism is arranged inside the mounting block.

[0013] Optionally, the fixing mechanism includes a fixing groove, a bidirectional screw, a movable block, a fixing rod, a first bevel gear, a second bevel gear, a round rod and a rotating handle, the fixing groove is fixed to the inner bottom end of the mounting block, the bidirectional screw is arranged at the inner front end of the fixing groove and extends to the rear end of the fixing groove, the movable block and the fixing rod are each provided with two groups, and are arranged symmetrically front and back, the movable block is arranged at the outer side of the bidirectional screw and extends upward to the top of the fixing groove, the fixing rod is fixed to the top of the movable block, the first bevel gear is fixed to the rear end of the bidirectional screw, the second bevel gear is fixed to the outer side of the round rod, and the second bevel gear and the first bevel gear are meshed with each other, the round rod is arranged at the inner right end of the mounting block and extends to the left end of the mounting block, and the rotating handle is fixed to the left end of the round rod.

[0014] Optionally, the cleaning mechanism includes a protective shell, a support plate, a pull block, a high-pressure gas box, an electric valve, a nozzle, a closed groove, a cylinder, a closing plate and a limiting mechanism, the protective shell is arranged at the left end of the mounting block, and penetrates the mounting block to the right and is arranged inside the furnace body, the support plate is arranged at the inner bottom end of the protective shell, and extends to the left to the left end of the protective shell, the pull block is fixed to the left end of the support plate, the high-pressure gas box is arranged at the top of the support plate, the electric valve is arranged at the right end of the high-pressure gas box through a connecting pipe, the nozzle is connected to the right end of the high-pressure gas box through a connecting pipe, and the nozzle is arranged at the inner right end of the protective shell, the closed groove is opened at the bottom end of the inner wall of the protective shell, the cylinder is installed in the closed groove, the closed plate is arranged in the closed groove, and extends to the right to the right side of the inner wall of the protective shell, the left end of the closing plate is transmission connected to the cylinder, and the limiting mechanism is provided with two groups, and is symmetrically arranged at the inner front end and the inner rear end of the protective shell with the support plate as the center.

[0015] Optionally, the limiting mechanism includes a stop block, a limiting groove, a limit block, an adjustment block, an adjustment groove and a spring, the stop block is fixed at the rear end of the support plate, the limiting groove is opened at the rear end of the inner wall of the protective shell, the limit block is arranged inside the limiting groove and extends forward to the interior of the protective shell, the adjustment block is fixed at the rear end of the limit block and extends to the left to the interior of the adjustment groove, the adjustment groove is opened at the left end of the protective shell, the spring is fixed at the rear end of the interior of the adjustment groove, and the front end of the spring is elastically connected to the rear end of the adjustment block.

[0016] Optionally, the inner wall of the movable block is threaded and connected to the outer thread of the bidirectional screw. Through this arrangement, the bidirectional screw can be driven to move when the bidirectional screw rotates.

[0017] Optionally, a groove is provided on the outer side of the movable block, and the groove is arranged in an arc shape, and a shock-proof pad is provided inside the groove. Through this arrangement, the movable block can fix the sound generator and sound wave collector.

[0018] Optionally, the fixing rod is arranged in an "L" shape and matches with the notch of the fixing piece. This arrangement makes it easy for the fixing rod to extend into the fixing piece for fixing.

[0019] Optionally, a sealing gasket is provided on the outer side of the closing plate, and this arrangement improves the sealing effect of the right side of the bottom end of the protective shell.

[0020] Optionally, the left end face of the limit block is inclined and tilted forward from left to right. Through this arrangement, when the support plate moves in, the limit block is pressed against the inclined surface of the limit block by the stop block to move into the limit groove.

[0021] The present invention has the following advantages: The present invention provides a boiler furnace temperature measurement method and a temperature measurement device through improvement, which have the following improvements compared with similar devices:

[0022] The present invention provides a boiler furnace temperature measurement method and a temperature measurement device, which adopts a pneumatic sound source, an integrated sound wave transmitting / receiving structure, 8 transmitting and 8 receiving, and a total of 24 sound wave paths for the best effect. The reconstruction accuracy of the temperature field is determined by the number of path temperature projections, that is, the more the number of path temperature projections, the higher the accuracy of the reconstructed temperature field. Only 8 sets of monitoring devices need to be set up, and the sound wave transmitting / receiving are set together to meet the actual temperature measurement needs.

[0023] At the same time, a fixing mechanism and a cleaning mechanism are set up, and the round rod is rotated by rotating the handle. When the round rod rotates, it drives the second bevel gear to rotate. When the second bevel gear rotates, it drives the first bevel gear to rotate. The rotation of the first bevel gear drives the two-way screw to rotate. The rotation of the two-way screw drives the movable block to move. When the movable block moves, the sound generator and sound wave collector are fixed. Through this setting, the sound generator and sound wave collector can be quickly fixed to improve its installation efficiency. The cylinder drives the closing plate to move. When the closing plate moves, the seal of the protective shell is cancelled, and the high-pressure gas in the high-pressure gas box is sprayed out through the nozzle to clean the probe of the sound generator and sound wave collector. Through this setting, the probe of the sound generator and sound wave collector is automatically cleaned to prevent particles from adhering to ensure the authenticity of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a front view of the structure of the present invention;

[0026] Figure 3 This is a front view of the temperature measuring device structure of the present invention;

[0027] Figure 4 It is a side view of the fixing mechanism structure of the present invention;

[0028] Figure 5It is a top view of the fixing mechanism structure of the present invention;

[0029] Figure 6 It is a front view of the cleaning mechanism structure of the present invention;

[0030] Figure 7 It is a top view of the cleaning mechanism structure of the present invention;

[0031] Figure 8 It is a top view of the limiting mechanism structure of the present invention.

[0032] Description of reference numerals: furnace body 1, temperature measuring device 2, mounting block 21, sound generator and sound wave collector 22, solenoid valve 23, compressed air box 24, piezoelectric sound wave sensor 25, preamplifier 26, fixing part 27, fixing mechanism 28, cleaning mechanism 29, fixing groove 281, bidirectional screw 282, movable block 283, fixing rod 284, first bevel gear 285, second bevel gear 286, Round rod-287, rotating handle-288, protective shell-291, supporting plate-292, pulling block-293, high-pressure gas box-294, electric valve-295, nozzle-296, closing groove-297, cylinder-298, closing plate-299, limiting mechanism-2910, stopper-29101, limiting groove-29102, limiting block-29103, adjusting block-29104, adjusting groove-29105, spring-29106. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] Please refer to Figure 1-8 This embodiment provides a method for measuring the temperature of a boiler furnace, and the specific method is as follows:

[0038] Step S1: First, eight sets of temperature measuring devices are installed at the front end, left end, rear end and right end of the furnace in pairs, and fixed;

[0039] Step S2: Setting up a sound generation and sound wave collection system, each sound generation and sound wave collection system has both the function of transmitting and receiving sound waves;

[0040] Step S3: using 0.5 MPa instrument gas from the boiler, a white noise with a specific bandwidth is emitted through a sound generating device;

[0041] Step S4: 8 sets of sound generation and sound wave collection systems are evenly distributed on the four walls of the same horizontal plane of the boiler, forming 8 transmitters and 8 receivers, with a total of 24 sound wave paths. The temperature measurement operation method of the sound wave path adopts the cross-correlation method, the sampling frequency is 200KHz, the temperature projection uniformity is good, and the temperature field formed on this basis has high accuracy;

[0042] Step S5: The square of the propagation speed of the sound wave in the gas is proportional to the gas temperature in its transmission path, that is, The average temperature of the propagation path in the boiler furnace is measured through the sound generation and sound wave acquisition system. According to the different sound wave path temperature diagrams formed by different boilers, the temperature field reconstruction algorithm and tomography technology based on Gaussian function and regularization method are used to reconstruct the temperature field under less temperature projection conditions and display the temperature distribution state and other related information online in real time. The temperature field is reconstructed under temperature projection conditions and the temperature distribution state of the measuring surface is displayed online in real time and quantitatively on the display.

[0043] Please refer to Figure 1-3The present embodiment provides a boiler furnace temperature measuring device, including a furnace body 1 and a temperature measuring device 2. The temperature measuring device 2 is provided with eight groups, and two of them are installed on the front end, left end, rear end and right end of the furnace body 1 respectively. The temperature measuring device 2 includes a mounting block 21, a sound generator and sound wave collector 22, a solenoid valve 23, a compressed air box 24, a piezoelectric sound wave sensor 25, a preamplifier 26, a fixing member 27, a fixing mechanism 28 and a cleaning mechanism 29. The mounting block 21 is arranged at the left end of the furnace body 1, the sound generator and sound wave collector 22 is arranged at the left end of the mounting block 21, and penetrates the mounting block 21 to the right and is arranged on the furnace body 1. The solenoid valve 23 is arranged at the bottom end of the sound generator and sound wave collector 22, and the bottom end of the solenoid valve 23 is communicated with the compressed air box 24, the compressed air box 24 is arranged at the left end of the furnace body 1 through the connecting plate, the piezoelectric sound wave sensor 25 is installed at the bottom end of the sound generator and sound wave collector 22, and the bottom end of the piezoelectric sound wave sensor 25 is communicated with the preamplifier 26, the preamplifier 26 is arranged at the left end of the furnace body 1 through the connecting plate, the fixing member 27 is fixed to the outside of the sound generator and sound wave collector 22, the fixing mechanism 28 is arranged inside the mounting block 21, and the cleaning mechanism 29 is arranged inside the mounting block 21.

[0044] Please refer to Figure 4 and Figure 5 , the present embodiment provides a boiler furnace temperature measuring device, the fixing mechanism 28 includes a fixing groove 281, a bidirectional screw 282, a movable block 283, a fixing rod 284, a first bevel gear 285, a second bevel gear 286, a round rod 287 and a rotating handle 288, the fixing groove 281 is fixed to the inner bottom end of the mounting block 21, the bidirectional screw 282 is arranged at the inner front end of the fixing groove 281, and extends to the rear end of the fixing groove 281, the movable block 283 and the fixing rod 284 are provided with two groups, and are symmetrically arranged front and back, the movable block 283 is arranged on the outer side of the bidirectional screw 282, and extends upward to the top of the fixing groove 281, the fixing rod 284 is fixed to the top of the movable block 283, the first bevel gear 285 is fixed to the rear end of the bidirectional screw 282, and the second bevel gear 286 is fixed to the round rod 28 7, and the second bevel gear 286 and the first bevel gear 285 are meshed with each other, the round rod 287 is arranged at the inner right end of the mounting block 21, and extends to the left to the left end of the mounting block 21, the handle 288 is fixed to the left end of the round rod 287, the inner wall of the movable block 283 is threaded, and is threadedly connected with the outer side of the bidirectional screw 282. Through this arrangement, the bidirectional screw 282 can be driven to move when the bidirectional screw 282 rotates. A groove is provided on the outer side of the movable block 283, and the groove is arranged in an arc shape. A shockproof pad is provided inside the groove. Through this arrangement, the movable block 283 can fix the sound and sound wave collector 22. The fixing rod 284 is arranged in an "L" shape and coincides with the notch of the fixing member 27. Through this arrangement, the fixing rod 284 is easy to extend into the fixing member 27 for fixing.

[0045] Please refer to Figure 6-8 The present embodiment provides a boiler furnace temperature measuring device, wherein the cleaning mechanism 29 comprises a protective shell 291, a support plate 292, a pull block 293, a high-pressure gas box 294, an electric valve 295, a nozzle 296, a closing groove 297, a cylinder 298, a closing plate 299 and a limiting mechanism 2910. The protective shell 291 is arranged at the left end of the mounting block 21, and penetrates the mounting block 21 to the right and is arranged inside the furnace body 1. The support plate 292 is arranged at the inner bottom end of the protective shell 291 and extends to the left to the left end of the protective shell 291. The pull block 293 is fixed to the left end of the support plate 292. The high-pressure gas box 294 is arranged at the support plate 294. At the top of the support plate 292, the electric valve 295 is arranged at the right end of the high-pressure gas box 294 through a connecting pipe, the nozzle 296 is connected to the right end of the high-pressure gas box 294 through a connecting pipe, and the nozzle 296 is arranged at the right end of the inside of the protective shell 291, the closing groove 297 is opened at the bottom end of the inner wall of the protective shell 291, the cylinder 298 is installed inside the closing groove 297, the closing plate 299 is arranged inside the closing groove 297, and extends rightward to the right side of the inner wall of the protective shell 291, the left end of the closing plate 299 is connected to the cylinder 298 in a transmission manner, and the limiting mechanism 2910 is provided with two groups, and is arranged in a front-to-back manner with the support plate 292 as the center. The limiting mechanism 2910 is symmetrically arranged at the inner front end and the inner rear end of the protective shell 291, and includes a stopper 29101, a limit groove 29102, a limit block 29103, an adjustment block 29104, an adjustment groove 29105 and a spring 29106. The stopper 29101 is fixed to the rear end of the support plate 292, the limit groove 29102 is opened at the rear end of the inner wall of the protective shell 291, the limit block 29103 is arranged inside the limit groove 29102, and extends forward to the inside of the protective shell 291, and the adjustment block 29104 is fixed to the rear end of the limit block 29103, and extends leftward to the inner wall of the adjustment groove 29105. The adjusting groove 29105 is opened at the left end of the protective shell 291, the spring 29106 is fixed to the inner rear end of the adjusting groove 29105, and the front end of the spring 29106 is elastically connected to the rear end of the adjusting block 29104, and a sealing gasket is provided on the outer side of the closing plate 299. Through this arrangement, the sealing effect of the right side of the bottom end of the protective shell 291 is improved. The left end face of the limit block 29103 is inclined and inclined forward from left to right. Through this arrangement, when the support plate 292 moves in, the limit block 29103 is squeezed by the stop block 29101 on the inclined surface of the limit block 29103 to move into the limit groove 29102.

[0046] The present invention provides a boiler furnace temperature measurement method and a temperature measurement device through improvement, and the working principle thereof is as follows;

[0047] First, before use, the sound generator and sound wave collector 22, the solenoid valve 23, the compressed air box 24, the piezoelectric sound wave sensor 25 and the preamplifier 26 are sequentially installed next to the furnace body 1 and wait for use;

[0048] Second, when in use, the sound generator and sound wave collector 22 needs to be fixed to avoid displacement during use, and the handle 288 is rotated to drive the round rod 287 to rotate. When the round rod 287 rotates, the second bevel gear 286 is driven to rotate. When the second bevel gear 286 rotates, the first bevel gear 285 is driven to rotate. When the first bevel gear 285 rotates, the bidirectional screw 282 is driven to rotate;

[0049] Third, when the bidirectional screw 282 rotates, the movable block 283 is driven to move, and when the movable block 283 moves, the sound generator and sound wave collector 22 is wrapped and fixed. When the movable block 283 moves, the fixing rod 284 is driven to move, so that the fixing rod 284 extends into the fixing member 27 to fix the fixing member 27, and the sound generator and sound wave collector 22 can be fixed;

[0050] Fourth, the average temperature of the propagation path in the boiler furnace is measured by the sound generator and the sound wave collector 22. According to the different sound wave path temperature diagrams formed by different boilers, the temperature field reconstruction algorithm based on Gaussian function and regularization method and tomography technology are used to reconstruct the temperature field under less temperature projection conditions and display the temperature distribution state and other related information online in real time;

[0051] Fifth, during use, the probe of the sound generator and sound wave collector 22 needs to be cleaned to prevent particles from adhering to the sound generator and sound wave collector 22 and affecting the generation and reception of signals. The cylinder 298 is started to push the closing plate 299 into the closing groove 297 to open the bottom end of the protective shell 291.

[0052] Sixth, open the electric valve 295 to allow the high-pressure gas in the high-pressure gas box 294 to be ejected from the nozzle 296 to clean the probe of the sound generator and the sound wave collector 22. After the cleaning is completed, control the cylinder 298 to push the closing plate 299 to move so that it closes the protective shell 291;

[0053] Seventh, after the high-pressure gas box 294 has been used for many times, it is necessary to refill the gas therein, and the regulating block 29104 is pushed so that the regulating block 29104 drives the limit block 29103 to move. When the limit block 29103 moves, the fixation of the stop block 59101 is cancelled, and the pull block 293 is pulled so that the pull block 293 drives the support plate 292 to move. When the support plate 292 moves, it drives the high-pressure gas box 294 to move. The high-pressure gas box 294 is moved out of the protective shell 291, and the gas is refilled therein;

[0054] Eighth, after the replenishment is completed, the pull block 293 is pushed so that the pull block 293 drives the support plate 292 to move. When the support plate 292 drives the block 29101 to move, the block 29101 squeezes the inclined surface of the limit block 29103, so that the limit block 29103 moves into the limit groove 29102. When the limit block 29103 moves, it squeezes the spring 29106. When the block 29101 moves beyond the limit block 29103, the spring 29106 loses its force and releases its elastic potential energy to push the limit block 29103 to move. The limit block 29103 moves out of the limit groove 29102, blocks the position of the block 29101, and the support plate 292 can be fixed in the protective shell 291 for use.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for measuring temperature in a boiler furnace, characterized in that: The specific method is as follows: Step S1: First, eight sets of temperature measuring devices are installed at the front end, left end, rear end and right end of the furnace in pairs, and fixed; Step S2: Setting up a sound generation and sound wave collection system, each sound generation and sound wave collection system has both the function of transmitting and receiving sound waves; Step S3: using 0.5 MPa instrument gas from the boiler, a white noise with a specific bandwidth is emitted through a sound generating device; Step S4: 8 sets of sound generation and sound wave collection systems are evenly distributed on the four walls of the same horizontal plane of the boiler, forming 8 transmitters and 8 receivers, with a total of 24 sound wave paths. The temperature measurement operation method of the sound wave path adopts the cross-correlation method, the sampling frequency is 200KHz, the temperature projection uniformity is good, and the temperature field formed on this basis has high accuracy; Step S5: The square of the propagation speed of the sound wave in the gas is proportional to the gas temperature in its transmission path, that is, The average temperature of the propagation path in the boiler furnace is measured through the sound generation and sound wave acquisition system. According to the different sound wave path temperature diagrams formed by different boilers, the temperature field reconstruction algorithm and tomography technology based on Gaussian function and regularization method are used to reconstruct the temperature field under less temperature projection conditions and display the temperature distribution state and other related information in real time online. The temperature field is reconstructed under temperature projection conditions and the temperature distribution state of the measuring surface is displayed in real time online and quantitatively on the display.

2. A boiler furnace temperature measuring device for implementing the boiler furnace temperature measuring method according to claim 1, comprising a furnace body (1); Features: The invention also comprises a temperature measuring device (2), wherein the temperature measuring device (2) is provided with eight groups, and is respectively installed at the front end, left end, rear end and right end of the furnace body (1) in pairs. The temperature measuring device (2) comprises a mounting block (21), a sound generator and sound wave collector (22), an electromagnetic valve (23), a compressed air box (24), a piezoelectric sound wave sensor (25), a preamplifier (26), a fixing member (27), a fixing mechanism (28) and a cleaning mechanism (29). The mounting block (21) is arranged at the left end of the furnace body (1), the sound generator and sound wave collector (22) is arranged at the left end of the mounting block (21), and penetrates the mounting block (21) to the right and is arranged inside the furnace body (1). The electromagnetic valve (23) The solenoid valve (23) is arranged at the bottom end of the sound generator and sound wave collector (22), and the bottom end of the solenoid valve (23) is connected to a compressed air box (24), and the compressed air box (24) is arranged at the left end of the furnace body (1) through a connecting plate. The piezoelectric sound wave sensor (25) is installed at the bottom end of the sound generator and sound wave collector (22), and the bottom end of the piezoelectric sound wave sensor (25) is connected to a preamplifier (26), and the preamplifier (26) is arranged at the left end of the furnace body (1) through a connecting plate. The fixing member (27) is fixed to the outside of the sound generator and sound wave collector (22), the fixing mechanism (28) is arranged inside the mounting block (21), and the cleaning mechanism (29) is arranged inside the mounting block (21).

3. A boiler furnace temperature measuring device according to claim 2, characterized in that: The fixing mechanism (28) comprises a fixing groove (281), a bidirectional screw rod (282), a movable block (283), a fixing rod (284), a first bevel gear (285), a second bevel gear (286), a round rod (287) and a rotating handle (288); the fixing groove (281) is fixed to the inner bottom end of the mounting block (21); the bidirectional screw rod (282) is arranged at the inner front end of the fixing groove (281) and extends to the rear end of the fixing groove (281); the movable block (283) and the fixing rod (284) are each provided with two groups, and are both arranged symmetrically in front and back; the movable block (283) is provided with The fixing rod (284) is fixed to the top of the movable block (283), the first bevel gear (285) is fixed to the rear end of the bidirectional screw rod (282), the second bevel gear (286) is fixed to the outside of the round rod (287), and the second bevel gear (286) and the first bevel gear (285) are meshed with each other, the round rod (287) is arranged at the right end inside the mounting block (21), and extends leftward to the left end of the mounting block (21), and the rotating handle (288) is fixed to the left end of the round rod (287).

4. A boiler furnace temperature measuring device according to claim 2, characterized in that: The cleaning mechanism (29) comprises a protective shell (291), a support plate (292), a pull block (293), a high-pressure gas box (294), an electric valve (295), a nozzle (296), a closing groove (297), a cylinder (298), a closing plate (299) and a limiting mechanism (2910). The protective shell (291) is arranged at the left end of the mounting block (21) and penetrates the mounting block (21) to the right and is arranged inside the furnace body (1). The support plate (292) is arranged at the bottom end of the protective shell (291) and extends to the left end of the protective shell (291). The pull block (293) is fixed to the left end of the support plate (292). The high-pressure gas box (294) is arranged at the top of the support plate (292). The electric valve (29 5) is arranged at the right end of the high-pressure gas box (294) through a connecting pipe, the nozzle (296) is connected to the right end of the high-pressure gas box (294) through the connecting pipe, and the nozzle (296) is arranged at the right end of the inside of the protective shell (291), the closed groove (297) is opened at the bottom end of the inner wall of the protective shell (291), the cylinder (298) is installed inside the closed groove (297), the closed plate (299) is arranged inside the closed groove (297), and extends rightward to the right side of the inner wall of the protective shell (291), the left end of the closed plate (299) is connected to the cylinder (298) in a transmission manner, and the limiting mechanism (2910) is provided with two groups, and is symmetrically arranged at the internal front end and the internal rear end of the protective shell (291) with the support plate (292) as the center.

5. A boiler furnace temperature measuring device according to claim 4, characterized in that: The limiting mechanism (2910) comprises a stopper (29101), a limiting groove (29102), a limiter block (29103), an adjustment block (29104), an adjustment groove (29105) and a spring (29106), wherein the stopper (29101) is fixed to the rear end of the support plate (292), the limiting groove (29102) is provided at the rear end of the inner wall of the protective shell (291), and the limiter block (29103) is provided at the rear end of the limiting groove (29102). The adjusting block (29104) is fixed at the rear end of the limiting block (29103) and extends leftward to the inside of the adjusting slot (29105). The adjusting slot (29105) is opened at the left end of the protective shell (291). The spring (29106) is fixed at the rear end of the adjusting slot (29105), and the front end of the spring (29106) is elastically connected to the rear end of the adjusting block (29104).

6. A boiler furnace temperature measuring device according to claim 3, characterized in that: The inner wall of the movable block (283) is threaded and is threadedly connected to the outer wall of the bidirectional screw (282).

7. A boiler furnace temperature measuring device according to claim 3, characterized in that: The outer side of the movable block (283) is provided with a groove, which is arranged in an arc shape, and a shockproof pad is arranged inside the groove.

8. A boiler furnace temperature measuring device according to claim 3, characterized in that: The fixing rod (284) is arranged in an "L" shape and matches the notch of the fixing member (27).

9. A boiler furnace temperature measuring device according to claim 4, characterized in that: A sealing gasket is provided on the outer side of the closing plate (299).

10. A boiler furnace temperature measuring device according to claim 5, characterized in that: The left end surface of the limit block (29103) is arranged to be inclined and tilts forward from left to right.

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