CN214893684U

CN214893684U - Boiler combustion layer infrared temperature measuring device with automatic coke cleaning function

Info

Publication number: CN214893684U
Application number: CN202120241822.4U
Authority: CN
Inventors: 杨国田; 刘禾; 管文博; 马亮; 李新利; 张维
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-11-26
Anticipated expiration: 2031-01-28

Abstract

The utility model belongs to the field of temperature detection equipment, in particular to an infrared temperature measuring device of a boiler combustion layer, which has a function of removing flying ash and coking on the optical path of the infrared temperature measuring device, comprising an infrared temperature measuring system, a decoking device and a pneumatic control device; the infrared temperature measuring system comprises a cone cylinder 10, a supporting cylinder 27, a base 5, a control sleeve 28, a rear cover plate 29, a fixing plate A20, a fixing plate B22, a heat-insulating inner sleeve 8 and an infrared temperature measuring instrument 21; the front end of the conical cylinder 10 is a cylindrical light guide pipe 30, the tail end of the conical cylinder is fixedly connected with the heat insulation inner sleeve 8, and the supporting cylinder 27 is used for supporting the base 5 and the heat insulation inner sleeve 8 and protecting the cylinder 7 and the infrared temperature measuring instrument 21 in the supporting cylinder 27; the utility model discloses can guarantee furnace flame temperature measurement's validity and accuracy, satisfy the requirement of the automatic decoking of infrared temperature measuring device, can confirm the frequency and the intensity of decoking, easy operation convenience by oneself when decoking, the security is high.

Description

Boiler combustion layer infrared temperature measuring device with automatic coke cleaning function

Technical Field

The utility model belongs to the temperature-detecting equipment field, in particular to have the infrared temperature measuring device of boiler burning layer of clear function to flying dust on the infrared temperature measuring device light path and coking.

Background

The furnace temperature of the boiler is one of important parameters for optimizing the combustion of the boiler, and the measurement of the furnace temperature field is the most direct reflection of whether the combustion state of the furnace is stable or not. Through accurate measurement of the temperature field, the combustion state of the boiler can be judged, predicted and diagnosed, the fuel is controlled to be reasonably and fully combusted in the hearth, and the temperature field is ensured to be uniformly distributed in the hearth. After the pulverized coal is combusted in the boiler for a long time, generated ash particles can flow along with flue gas, coking, fly ash and other particles are easily formed at the inner wall of the boiler and a temperature measuring hole, and then the accuracy and effectiveness of the infrared temperature measuring device for the flame in the boiler can be influenced, so that the boiler cannot safely and effectively operate.

At present, the traditional modes for removing coking and fly ash are manual cleaning or blowing by using air flow, the mode of manual cleaning is that after an inspector dismantles the whole infrared temperature measuring device, a drill rod or the like is used for cleaning the fly ash and removing coking from a measuring hole, the whole process is time-consuming and labor-consuming, and great potential safety hazard exists; the mode of air current cleaning mainly utilizes the pressure difference between the inside and the outside of the hearth, the cleaning is completed through the air current flowing, but the air current flow rate is slow, and simultaneously, water and oil carried in the air current are easy to pollute an optical system lens in the infrared temperature measuring device, so that the instrument can not stably operate for a long time, and the maintenance amount is increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome a series of defects that prior art exists, the utility model aims to provide an infrared temperature measuring device of boiler burning layer with automatic decoking function, realize the measurement to boiler burning layer temperature, acquire the combustion situation in the furnace, but coking and flying dust on the automatically clearing temperature measuring device measuring orifice simultaneously ensure that infrared temperature measuring device is not sheltered from and influence the temperature measurement effect by furnace coking and flying dust to have from the cooling function, show furnace flame temperature in real time, the function of infrared temperature measuring device measuring orifice state.

The utility model relates to a boiler combustion layer infrared temperature measuring device with automatic coke cleaning function, which comprises an infrared temperature measuring system, a coke cleaning device and a pneumatic control device;

the infrared temperature measurement system comprises a cone cylinder 10, a support cylinder 27, a base 5, a control sleeve 28, a rear cover plate 29, a fixing plate A20, a fixing plate B22, a heat insulation inner sleeve 8 and an infrared temperature measurement instrument 21, wherein the pneumatic control device is arranged in the control sleeve 28;

the front end of the cone 10 is a cylindrical light pipe 30, the tail end of the cone is fixedly connected with the heat insulation inner sleeve 8, the light pipe 30 is used for radiating radiation light in a hearth to the infrared temperature measurement optical lens 2102, and the length of the light pipe is enough to penetrate through a water cooling wall of the boiler and extend into the boiler;

the supporting cylinder 27 is used for supporting the base 5 and the heat insulation inner sleeve 8 and protecting the cylinder 7 and the infrared temperature measuring instrument 21 in the supporting cylinder 27;

the infrared temperature measuring instrument 21 comprises an infrared temperature measuring photoelectric detection and signal processing unit 2101 and an infrared temperature measuring optical lens 2102, and the infrared temperature measuring photoelectric detection and signal processing unit 2101 is arranged in a control sleeve 28;

the infrared temperature measuring optical lens 2102 is fixed on the heat insulation inner sleeve 8, is consistent with the central line of the conical cylinder 10, and is used for receiving a radiation quantity signal from the hearth and transmitting the radiation quantity signal into the infrared temperature measuring photoelectric detection and signal processing unit 2101 through an optical fiber.

Preferably, the fixing plate a20, the fixing plate B22 and the control sleeve 28 are fixed on a base 5, the base 5 is provided with a base air inlet 501, the base air inlet 501 is connected with an air source, cooling air is introduced and blown into a hearth through the supporting cylinder 27, the heat-insulating inner sleeve 8 and the cone cylinder 10, cooling of the infrared thermometric optical lens 2102 is realized, and the light transmittance of the light guide pipe 30 is ensured.

Preferably, the fixing plate B22 is fixed with a bus bar 17, a two-position five-way solenoid valve 15 and a one-way solenoid valve 14.

Preferably, the infrared temperature measuring device is fixed on the furnace wall 1 of the combustion layer of the boiler through an outer cylinder sleeve 3 with a flange and extends into the furnace through a measuring hole reserved on a water-cooled wall of the boiler.

Preferably, the coke cleaning device comprises a ram 9 with a viewing hole 904, a first air path seat 24, a second air path seat 11, a cylinder 7 and a vibrating air hammer 6;

the ram 9 is arranged in the front end of the conical cylinder 10, and a gap is reserved between the ram 9 and the conical cylinder 10;

the first air circuit seat 24 and the second air circuit seat 11 are fixedly connected to 4 air inlets of the air cylinder 7, and the air cylinder 7 is connected with the base 5;

two gas path short pipes 13 are arranged on the base 5 and used for introducing compressed air into the cylinder, and an air source is connected to the base air inlet 501 to cool the infrared temperature measurement optical lens 2102 and assist in cleaning the front end of the ram 9; two gas ports 502 in the base are used to introduce gas into the interlayer;

the vibrating air hammer 6 is connected with the air cylinder through two support rods 18 and an excitation connecting plate 19, and when the vibrating air hammer 6 works, the vibrating air hammer causes the vibration of the hammer to shake off particles attached to the hammer.

Preferably, the pneumatic control device comprises an air source, a two-position five-way electromagnetic valve 15, a bus bar 17, a three-way pipe 16, a one-way electromagnetic valve 14, an air path short pipe 13, a PU pipe 12, a bus bar air inlet 1701, a vibrating air hammer air outlet 602, a three-way pipe air outlet 1603, a front cylinder air port 701 of an air cylinder and a rear cylinder air port 702, wherein the air source is connected with the bus bar air inlet 1701, and the one-way electromagnetic valve 14 is connected with the bus bar 17 and the vibrating air hammer 6; the two-position five-way electromagnetic valve 15 is connected with the three-way pipe fitting 16 and the bus bar 17, the gas path short pipe 13 is connected with the two-position five-way electromagnetic valve 15, and the PU pipe 12 is connected with the gas path short pipe 13.

Preferably, the heat insulation inner sleeve 8 is connected with the support cylinder 27, the camera 4 is embedded on the heat insulation inner sleeve 8, one end of the ram 9 is connected with the cylinder 7 through two connecting rods and a connecting disc 25, the other end of the ram is a circular steel plate 26 provided with a first circular opening 901 and a second circular opening 902, and a U-shaped opening cylindrical pipe orifice is arranged behind the circular steel plate 26, so that the camera 4 can acquire a real-time image of the measuring hole, and the phenomenon that the pipe orifice is too long to block an observation light path of the camera 4 is avoided.

The utility model discloses an infrared temperature measuring device of boiler burning layer with automatic decoking function has following beneficial effect:

1. the utility model can ensure the effectiveness and accuracy of the flame temperature measurement of the hearth and meet the requirement of automatic coke cleaning of the infrared temperature measuring device;

2. the method mainly comprises the steps of automatically judging whether a measuring hole is blocked or not and determining whether decoking operation should be carried out or not according to the blocking degree of the measuring hole, automatically determining the decoking frequency and intensity during decoking, and simultaneously meeting the requirement of carrying out decoking on the measuring hole at any time;

3. the coke cleaning machine is simple and convenient to operate and high in safety, replaces the traditional manual operation mode of coke cleaning with an automatic mode, greatly saves production cost, improves working efficiency, prolongs service life of instruments, and improves intelligent and modernized levels.

Drawings

FIG. 1 is the schematic view of the whole structure of the infrared temperature measuring device of the boiler combustion layer.

Fig. 2 is the structure schematic diagram of the infrared temperature measurement system of the utility model.

Fig. 3 is a schematic structural view of the fixing plate a of the present invention.

Fig. 4 is a schematic structural view of the fixing plate B of the present invention.

Fig. 5 is a schematic structural view of the coke cleaning device of the present invention.

Fig. 6 is a top view of the coke cleaning device of the present invention.

Fig. 7 is a schematic view of the gas circuit connection of the present invention.

Fig. 8 is a blockage-judging light path diagram of the present invention.

Fig. 9a and 9b are the enlarged view of the portion a in fig. 1 and the right side view of the ram according to the present invention.

Fig. 10a and 10b are schematic diagrams of the bus bar structure of the present invention.

Fig. 11a and 11b are schematic structural diagrams of the support rod and the excitation connecting plate of the present invention.

Fig. 12 is a schematic view of the single-way solenoid valve of the present invention.

Fig. 13 is a schematic view of the two-position five-way solenoid valve of the present invention.

Fig. 14 is a schematic view of a tee of the present invention.

Fig. 15 is a schematic view of the vibrating air hammer of the present invention.

Fig. 16a and 16b are a top view and a bottom view of the cylinder according to the present invention.

The reference numbers in the figures are:

1. the device comprises a boiler combustion layer furnace wall, a 4 camera, a 5 base, a 6 vibration air hammer, a 7 air cylinder, an 8 heat insulation inner sleeve, a 9 ram, a 10 cone, a 11 second air path seat, a 12PU pipe, a 13 air path short pipe, a 14 single-pass electromagnetic valve, a 15 two-position five-way electromagnetic valve, a 16 three-way pipe, a 17 busbar, an 18 supporting rod, a 19 excitation connecting plate, a20 fixing plate A, a 22 fixing plate B, a 21 infrared temperature measuring instrument, a 24 first air path seat, a 25 connecting disc and a 26 round steel plate;

a first set of fixation holes for 2003 plate A and a second set of fixation holes for 2004 plate A;

2101 infrared temperature measurement photoelectric detection and signal processing unit, 2102 infrared temperature measurement optical lens;

2205 fixing the third group of fixing holes of the plate B and 2206 fixing the first group of fixing holes of the plate B;

501 base air inlet, 502 air inlet;

601 vibrating air hammer air inlet, 602 vibrating air hammer air outlet;

701 front cylinder vent, 702 rear cylinder vent;

901 first round mouth, 902 second round mouth, 903 third round mouth, 904 observation hole

1402 single-way electromagnetic valve air inlet, 1401 single-way electromagnetic valve air outlet.

1501. 1503 first outlet of the two-position five-way solenoid valve, 1502 inlet of the two-position five-way solenoid valve, 1505 and 1504 second outlet of the two-position five-way solenoid valve.

1601 tee pipe first inlet, 1602 tee pipe second inlet, 1603 tee pipe outlet.

1701 bus inlet, 1702 bus outlet.

Detailed Description

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will combine the drawings in the embodiments of the present invention to perform more detailed description on the technical solution in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments and the directional terms described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The utility model discloses an in a wide range of embodiment, a boiler combustion layer infrared temperature measuring device with automatic coke cleaning function, as shown in the schematic diagram of fig. 5, it sets up on boiler combustion layer oven 1, is equipped with the measuring aperture on boiler combustion layer oven 1, boiler combustion layer infrared temperature measuring device with automatic coke cleaning function mainly includes infrared temperature measuring system, coke cleaning device and sets up the pneumatic control device in control sleeve 28.

As shown in fig. 1-2, the infrared temperature measurement system includes a cone cylinder 10, a support cylinder 27, a base 5, a control sleeve 28, a rear cover plate 29, a fixing plate a20, a fixing plate B22, a heat insulation inner sleeve 8, and an infrared temperature measurement instrument 21.

FIG. 3 shows a schematic view of mounting plate A, which is mounted on the base 5 through second mounting holes 2004 of mounting plate A, and a first set of mounting holes 2003 of mounting plate A is used to mount the infrared thermometric photodetection and signal processing unit 2101.

Fig. 4 shows a schematic structural diagram of a fixing plate B, one end of which is fixed on the base 5, a first set of fixing holes 2206 of the fixing plate B is used for fixedly mounting the bus bar 17, a second set of fixing holes 2203 of the fixing plate B is used for fixedly mounting the two-position five-way solenoid valve 15, and a third set of fixing holes 2205 of the fixing plate B is used for fixedly mounting the one-way solenoid valve 14.

The infrared temperature measuring device of the whole boiler combustion layer is fixed on the boiler wall 1 of the boiler combustion layer through the outer cylinder sleeve 3 with a flange and extends into the boiler through a measuring hole reserved on the boiler water wall.

The tail end of the cone 10 is fixedly connected with the heat insulation inner sleeve 8, the front end of the cone is provided with a cylindrical light pipe 30, the length of the light pipe 30 is enough to penetrate through a water-cooled wall of the boiler and extend into the boiler, and the light pipe 30 is used for radiating radiation light in a hearth onto the infrared temperature measurement optical lens 2102.

The supporting cylinder 27 is used for supporting the base 5 and the heat insulation inner sleeve 8, and plays a role in protecting the cylinder 7 and the infrared temperature measurement optical lens 2102 in the supporting cylinder 27.

The infrared temperature measuring optical lens 2102 is fixed on the heat insulation inner sleeve 8 and used for receiving a radiation quantity signal from a hearth and transmitting the radiation quantity signal into an infrared temperature measuring photoelectric detection and signal processing unit 2101 arranged in a control sleeve 28 through an optical fiber, and the central lines of the infrared temperature measuring optical lens 2102 and the cone cylinder 10 are consistent.

The fixing plate A20, the fixing plate B22 and the control sleeve 28 are fixed on the base 5 through screws, the base 5 is provided with a base air inlet 501, the base air inlet 501 is connected with an air source, cooling air is introduced and blown into a hearth through the supporting cylinder 27, the heat insulation inner sleeve 8 and the conical cylinder 10, the infrared temperature measurement optical lens 2102 is cooled, and the light transmission of the light guide pipe 30 is guaranteed.

The fixing plate a20 and the infrared temperature measurement photoelectric detection and signal processing unit 2101 are fixedly connected through a first group of fixing holes 2003 of the fixing plate a by screws, and the infrared temperature measurement photoelectric detection and signal processing unit 2101 receives and processes signals from the infrared temperature measurement optical lens 2102. The control sleeve 28 is used to protect the electronic components inside it from working properly.

And a bus bar 17, a two-position five-way electromagnetic valve 15 and a single-way electromagnetic valve are fixed on the fixing plate B22, and the air passage and the coke cleaning action of the coke cleaning system are controlled. The fixing plate B22 is fixed to the bus bar 17 through the first fixing hole 2206 of the fixing plate B, fixed to the two-position five-way solenoid valve 15 through the second fixing hole 2203, and fixed to the one-way solenoid valve 14 through the third fixing hole 2205 of the fixing plate B. The rear cover plate 29 is fixed with the control sleeve 28 in a sealing mode, and a display screen is arranged on the rear cover plate 29, so that the real-time display of the blocking condition of the measuring hole of the infrared temperature measuring device of the boiler combustion layer is realized.

When the boiler combustion layer infrared temperature measuring device normally works and measures the temperature of the furnace, the cone cylinder 10 penetrates through a measuring hole in the furnace wall 1 and extends into the furnace, the light guide pipe 30 on the cone cylinder 10 protrudes out of the furnace body, cooling air passes through the base air inlet 501 and is blown into the furnace through the base, the supporting cylinder 27 and the cone cylinder light guide pipe 30, and cooling effect on the infrared temperature measuring optical system and clearing of lighter fly ash on a temperature measuring light path are achieved. Because the internal combustion working condition of the coal-fired boiler is complex, the radiant light emitted from the interior of the hearth is radiated to a lens of the infrared temperature measuring optical system through the light guide pipe 30 on the cone cylinder 10, the infrared temperature measuring optical system processes the radiant light and then sends the radiant light to the infrared temperature measuring photoelectric detection and signal processing unit through the optical fiber, the infrared temperature measuring photoelectric detection and signal processing unit converts the received light signal into an electric signal, the signal amplifier amplifies the electric signal and converts the signal processing into a standard signal, and the processed standard signal is sent to the monitoring equipment to be output and displayed.

As shown in fig. 5-6, the decoking apparatus includes a ram 9 with a viewing hole 904, a heat insulating inner sleeve 8, a first air passage seat 24, a second air passage seat 11, a cylinder 7, and a vibrating air hammer 6.

The tail end of the cone cylinder 10 is fixed on the heat insulation inner sleeve 8, the front end of the cone cylinder 10 is a cylindrical light guide pipe 30, a ram 9 is arranged in the cone cylinder 10, a gap is reserved between the cone cylinder 10 and the ram 30, and the ram 9 can move forwards along the cone cylinder 10 when coke cleaning is carried out. One end of the ram 9 is connected with the cylinder 7 through two connecting rods and a connecting disc 25, the other end of the ram is a circular steel plate 26 provided with a first round opening 901 and a second round opening 902, a U-shaped opening cylindrical pipe opening is formed in the back of the circular steel plate 26, so that the camera 4 can collect real-time images of the measuring hole, the phenomenon that the pipe opening is too long and an observation light path of the camera 4 is blocked is avoided, the camera 4 observes images of the measuring hole in the front end of the temperature measuring system through a third round opening 903, and an observation light path diagram of the camera 4 is shown in fig. 4. The heat insulation inner sleeve 8 is connected with the supporting cylinder 27, the camera 4 is embedded on the heat insulation inner sleeve 8, and the light filter is arranged in front of the camera 4, so that the phenomenon that the photosensitive device of the camera is burnt out due to overhigh flame brightness of the hearth and the interference is generated in the judgment of system blockage is avoided.

The infrared temperature measuring optical lens 2102 is installed on an opening of the heat insulation inner sleeve 8 to measure the temperature of the flame of the hearth. The first air path seat 24 and the second air path seat 11 are fixedly connected to 4 air inlets of the air cylinder 7, and the air cylinder 7 is connected with the base 5 through bolts.

As shown in fig. 8, a blockage judging light path diagram is shown, the camera 4 is used for observing the measuring hole of the infrared temperature measuring device, the observed light path is shown by a dotted line in the diagram, the circular steel plate 26 is specially designed, so that the observation light path of the camera cannot be shielded, and the real-time monitoring of the measuring hole of the temperature measuring device is realized.

Fig. 9a and 9b show an enlarged view of a portion a in fig. 1 and a right side view of the ram 9, the observation hole 904 is a cylindrical nozzle of the ram 9, the first round hole 901 is a circular nozzle specially designed for not blocking a measurement optical path of the infrared thermometric instrument on the circular steel plate 26, the second round hole 902 is a circular nozzle specially designed for not blocking a measurement optical path on the circular steel plate 26, and the third round hole 903 is an observation hole of the camera 4.

Two gas path short pipes 13 are arranged on the base 5 and used for introducing compressed air into the cylinder, and an air source is connected to the base air inlet 501 to cool the infrared temperature measurement optical lens 2102 and assist in cleaning the front end of the ram 9; two gas ports 502 in the susceptor are used to introduce gas into the interlayer.

As shown in fig. 11a and 11b, the support rod 18 is used for connecting the vibrating air hammer 6 and the air cylinder 7, the shock excitation connecting plate is mainly used for fixing the support rod 18 and the vibrating air hammer, the vibrating air hammer 6 is connected with the air cylinder through the two support rods 18 and the shock excitation connecting plate 19, and the vibrating air hammer 6 causes the vibration of the hammer 9 during operation to shake off particles attached to the hammer 9.

As shown in fig. 7, the pneumatic control device comprises an air source, a two-position five-way solenoid valve 15, a bus bar 17, a three-way pipe 16, a one-way solenoid valve 14, an air path short pipe 13, a PU pipe 12, a bus bar air inlet 1701, a vibration air hammer air outlet 602, a three-way pipe air outlet 1603, and a front cylinder air port 701 and a rear cylinder air port 702 of the air cylinder.

Fig. 10a and 10b show a structural view of the bus bar 17, including the bus bar inlet 1701 and the bus bar outlet 1702.

FIG. 12 shows a block diagram of the single-pass solenoid valve 14, including a single-pass solenoid valve inlet 1402 and a single-pass solenoid valve outlet 1401.

Fig. 13 shows a block diagram of the two-position five-way solenoid valve 15, including a two-position five-way solenoid valve inlet port 1502, two-position five-way solenoid valve

first outlet ports

1501, 1503 and two-position five-way solenoid valve

second outlet ports

1505, 1504.

FIG. 14 shows a block diagram of tee 16, including tee first inlet port 1601, second inlet port 1602, and tee outlet port 1603.

Fig. 15 shows a structural view of the vibrating air hammer 6, including a vibrating air hammer inlet 601 and a vibrating air hammer outlet 602.

Fig. 16a and 16b show a block diagram of the cylinder 7, wherein fig. 16a is a top view of the cylinder 7 and fig. 16b is a bottom view of the cylinder 7, including a front cylinder port 701 and a rear cylinder port 702 of the cylinder.

Gas from the gas source enters the bus 17 from the bus inlet 1701, enters the first one-way solenoid valve outlet 1401 of the one-way solenoid valve 14 via the bus outlet 1702, and enters the vibrating air hammer 6, where it exits the vibrating air hammer from the vibrating air hammer outlet 602. The other path of gas enters a two-position five-way electromagnetic valve air inlet 1502 of a two-position five-way electromagnetic valve 15 through a busbar bus air outlet 1702, and

first air outlets

1504 and 1505 of the two-position five-way electromagnetic valve are connected with the air path short pipe 13, the gas enters the second air path seat 11 through the air path short pipe 13, the PU pipe 12 leads the gas into the first air path seat 24, and the gas flows through the first air path seat 24 and the second air path seat 11 and enters the cylinder through front and

rear air vents

701 and 702 of the cylinder. The exhausted gas in the cylinder enters the tee pipe 16 through the

second gas outlets

1503 and 1501 of the two-position five-way electromagnetic valve, and the gas enters the support cylinder 27 through the gas outlet 1603 of the tee pipe. The two-position five-way electromagnetic valve 15 controls the advancing and resetting actions of the air cylinder by controlling the air inlet and outlet of the air cylinder.

The utility model discloses well system judges that the method of measuring the hole jam does:

the method comprises the following steps: and (5) image acquisition. The RGB images of the measuring hole of the infrared temperature measuring device are collected by the camera 4, and the collected RGB images are converted into gray single-channel numerical value images according to the following formula, so that converted single-channel numerical value images are obtained.

Gray＝R×299+G×587+B×114+(500)/100

Wherein: r, G, B represent the three primary colors, respectively; gray is the converted Gray value.

Step two: and carrying out binarization processing by adopting an adaptive threshold value. Selecting a threshold value of the converted image through a self-adaptive mean value threshold value algorithm, mainly selecting a template with the radius larger than that of the fire observation hole by utilizing a template filtering mode, generating a mean value filtering mask which is as large as an original image, and determining the pixel point value of the image after binarization processing by comparing the gray levels of the original image and the mask. After the gray values of the original image and the mask are compared, binarization processing is carried out on the image, pixel points higher than a threshold value are identified as bright points, and pixel points lower than the threshold value are set as dark points.

Step three: and identifying the measuring hole image by using a connected domain mark extraction algorithm. Because the flame brightness in the hearth is high, the reflection action of the tube wall can cause a pseudo bright point in the binarized image, and the identification of the blocking state of the whole measuring hole is influenced, so that the binarized image must be processed by a connected domain extraction algorithm, and the interference of the pseudo bright point on the identification of the blocking state of the measuring hole is eliminated.

The specific method comprises the following steps: scanning the obtained binary image by pixels line by line, and searching the number of connected domains in the binary image; recording the searched connected domain, and calculating the number of bright spots in the connected domain; and extracting the area with the largest bright point number in the connected domain, and taking the area as a real binary image of the measuring hole to judge the blockage.

Step four: and (6) judging blockage. Assuming that errors are generated in measurement of the flame temperature of the combustion layer of the boiler, namely when the measuring hole is blocked, the number of bright points of the measuring hole obtained by the connected domain extraction algorithm is M, the number of bright points in the image detected at the current moment is N, and when the number N of the maximum bright points in the detected image is less than M, the measuring hole is considered to be blocked, and the decoking device is driven to perform the decoking action by self.

This device still possesses from cooling function, draw compressed air of the same kind and get into base air inlet 501, get into the device of coke cleaning, and sweep forward and get into in the intermediate layer of ram 9 and awl section of thick bamboo, can cool off cylinder, infrared temperature measurement optical system etc. and utilize the flow of compressed air current, the granule that drops when will coke cleaning is clear away, avoid coking granule to seal up the intermediate layer of ram 9 and awl section of thick bamboo, cause the unable normal work of coke cleaning mechanism, also can ensure the cleanness of ram 9 simultaneously, be difficult for being infected with coking granule, avoid ram 9 to cause secondary pollution to the measuring hole, influence the effect of coke cleaning and cause the influence to the temperature measurement.

The utility model discloses well coke cleaning device's control scheme does:

the method comprises the following steps: when the blockage judging system sends a command of removing coking, one path of compressed air is connected into the air inlet 1402 of the single-way solenoid valve through the busbar 17 and enters the vibrating air hammer 6 through the single-way solenoid valve 14, the compressed air causes the vibrating air hammer to vibrate and drives the air cylinder and the ram 9 to vibrate, the ram 9 continuously vibrates after the ram 9 strikes the coking block forwards, and the vibration can shake off particles which are stained at the front end of the ram 9 during coke removal and can also have a better effect of removing the coking block of the measuring hole.

Step two: when the step one is carried out, the other path of compressed air is introduced into the air cylinder through the two-position five-way electromagnetic valve 15, when the two-position five-way electromagnetic valve 15 is electrified, the first air outlet 1505 of the two-position five-way electromagnetic valve is communicated with the front cylinder air vent 701 of the air cylinder, and meanwhile, the rear cylinder air vent 702 is exhausted; when the two-position five-way electromagnetic valve 15 is powered off, the first air outlet 1504 of the two-position five-way electromagnetic valve 15 is communicated, the air inlet of the rear cylinder air inlet 702 is realized, and the air outlet of the front cylinder air inlet 701 is realized, so that the air cylinder is driven to drive the ram 9 to advance and reset, and the whole coke cleaning process is completed.

The working frequency of the coke cleaning device can be controlled by controlling the on-off of the two-position five-way electromagnetic valve 15, and the coke cleaning times can be controlled during each working.

An infrared thermometer: an optris CTRIO 1M infrared bicolor optical fiber thermometer;

2-position 5-way solenoid valve: 4V110-06A

Single-pass solenoid valve: 2V025-08

A cylinder: secondary processed MALJ16 25-25

Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. An infrared temperature measuring device with an automatic coke cleaning function for a boiler combustion layer is characterized by comprising an infrared temperature measuring system, a coke cleaning device and a pneumatic control device;

the infrared temperature measurement system comprises a conical cylinder (10), a supporting cylinder (27), a base (5), a control sleeve (28), a rear cover plate (29), a fixing plate A (20), a fixing plate B (22), a heat insulation inner sleeve (8) and an infrared temperature measurement instrument (21), and the pneumatic control device is arranged in the control sleeve (28);

the front end of the cone cylinder (10) is provided with a cylindrical light pipe (30), the tail end of the cone cylinder is fixedly connected with the heat insulation inner sleeve (8), the light pipe (30) is used for radiating radiation light in a hearth onto the infrared temperature measurement optical lens (2102), and the length of the light pipe is enough to penetrate through a water cooling wall of the boiler and extend into the boiler;

the supporting cylinder (27) is used for supporting the base (5) and the heat insulation inner sleeve (8) and protecting the cylinder (7) and the infrared temperature measuring instrument (21) in the supporting cylinder (27);

the infrared temperature measuring instrument (21) comprises an infrared temperature measuring photoelectric detection and signal processing unit (2101) and an infrared temperature measuring optical lens (2102), and the infrared temperature measuring photoelectric detection and signal processing unit (2101) is arranged in the control sleeve (28);

the infrared temperature measurement optical lens (2102) is fixed on the heat insulation inner sleeve (8), is consistent with the central line of the conical cylinder (10), and is used for receiving a radiation quantity signal from the hearth and transmitting the radiation quantity signal into the infrared temperature measurement photoelectric detection and signal processing unit (2101) through an optical fiber.

2. The infrared temperature measuring device of claim 1, wherein the fixing plate A (20), the fixing plate B (22) and the control sleeve (28) are fixed on a base (5), the base (5) is provided with a base air inlet (501), the base air inlet (501) is connected with an air source, cooling air is introduced and blown into a hearth through a supporting cylinder (27), a heat-insulating inner sleeve (8) and a cone cylinder (10), cooling of the infrared temperature measuring optical lens (2102) is achieved, and light transmittance of the light guide pipe (30) is guaranteed.

3. The infrared temperature measuring device according to claim 1, wherein a bus bar (17), a two-position five-way solenoid valve (15) and a one-way solenoid valve (14) are fixed on the fixing plate B (22).

4. The infrared temperature measuring device according to claim 1, characterized in that the infrared temperature measuring device is fixed on the boiler wall (1) of the boiler combustion layer through an outer cylinder sleeve (3) with a flange and extends into the boiler through a measuring hole reserved on the boiler water wall.

5. The infrared temperature measuring device of claim 1, wherein the decoking device comprises a ram (9) with a viewing hole (904), a first air path seat (24), a second air path seat (11), a cylinder (7) and a vibrating air hammer (6);

the ram (9) is arranged in the front end of the conical cylinder (10), and a gap is reserved between the ram (9) and the conical cylinder (10);

the first air circuit seat (24) and the second air circuit seat (11) are fixedly connected to 4 air inlets of the air cylinder (7), and the air cylinder (7) is connected with the base (5);

the base (5) is provided with two gas path short pipes (13) for introducing compressed air into the cylinder, and a base gas inlet (501) is connected with a gas source to cool the infrared temperature measurement optical lens (2102) and assist in cleaning the front end of the ram (9); two gas ports (502) in the susceptor for introducing gas into the interlayer;

the vibrating air hammer (6) is connected with the cylinder through two support rods (18) and an excitation connecting plate (19), and when the vibrating air hammer works, the vibrating air hammer (6) causes the vibration of the hammer to shake off particles attached to the hammer.

6. The infrared temperature measuring device of claim 1, wherein the pneumatic control device comprises an air source, a two-position five-way solenoid valve (15), a busbar (17), a three-way pipe (16), a one-way solenoid valve (14), a gas path short pipe (13), a PU pipe (12), a busbar gas inlet (1701), a vibrating air hammer gas outlet (602), a three-way pipe gas outlet (1603), a front cylinder gas vent (701) and a rear cylinder gas vent (702) of a cylinder, the air source is connected with the busbar gas inlet (1701), and the one-way solenoid valve (14) is connected with the busbar (17) and the vibrating air hammer (6); the two-position five-way electromagnetic valve (15) is connected with the three-way pipe fitting (16) and the busbar (17), the gas circuit short pipe (13) is connected with the two-position five-way electromagnetic valve (15), and the PU pipe (12) is connected with the gas circuit short pipe (13).

7. The infrared temperature measuring device of claim 5,

the utility model discloses a measuring hole's measuring instrument, including cylinder (7), ram (9), connecting rod, connection pad (25), circular steel sheet (26) for being equipped with first round mouth (901), second round mouth (902), U type opening cylinder mouth has behind circular steel sheet (26) for thermal-insulated endotheca (8) link to each other with a support section of thick bamboo (27), has inlayed camera (4) on thermal-insulated endotheca (8), ram (9) one end links to each other with cylinder (7) through two connecting rods and connection pad (25), the other end to camera (4) can gather the real-time image of measuring hole, avoids the mouth of pipe overlength and blocks the observation light path of camera (4).