WO2023236701A1 - Anti-blocking purging system for acoustic temperature measurement device of coal-fired boiler, and method for using same - Google Patents
Anti-blocking purging system for acoustic temperature measurement device of coal-fired boiler, and method for using same Download PDFInfo
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- WO2023236701A1 WO2023236701A1 PCT/CN2023/092668 CN2023092668W WO2023236701A1 WO 2023236701 A1 WO2023236701 A1 WO 2023236701A1 CN 2023092668 W CN2023092668 W CN 2023092668W WO 2023236701 A1 WO2023236701 A1 WO 2023236701A1
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- pressure
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- 238000010926 purge Methods 0.000 title claims abstract description 247
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000000737 periodic effect Effects 0.000 claims abstract description 49
- 230000001105 regulatory effect Effects 0.000 claims abstract description 48
- 239000000428 dust Substances 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 38
- 238000002955 isolation Methods 0.000 claims description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000007664 blowing Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0325—Control mechanisms therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
Definitions
- the invention belongs to the technical field of acoustic temperature measurement, and specifically relates to an anti-blocking and purging system of acoustic temperature measurement equipment for coal-fired boilers and a method of use.
- the flue gas in the furnace has a high ash content. If dust enters the measuring element of the acoustic temperature measurement equipment, it may cause damage to the measuring element. Long-term dust accumulation in the measuring hole may also easily cause the acoustic temperature measuring hole to be blocked. , when the flame in the furnace is deflected, coking and ash blocking or local high temperature may cause component damage. In order to ensure the long-term stable operation of the acoustic temperature measurement equipment, an anti-blocking and purging system needs to be arranged simultaneously.
- the purpose of the present invention is to provide an anti-blocking purging system and a usage method for acoustic temperature measurement equipment of coal-fired boilers.
- An anti-clogging purge system for coal-fired boiler acoustic temperature measurement equipment including:
- the automatic drainage pressure stabilizing tank includes a pressure stabilizing tank and an automatic drainage valve connected thereto.
- the pressure stabilizing tank is filled with compressed air to maintain pressure for downstream purge air;
- Purge the main pipeline The upstream of the purge main pipeline is connected to a pressure stabilizing tank, and the downstream is connected to each acoustic temperature measuring element.
- a main pipeline manual valve is set between the pressure stabilizing tank and the purging main pipeline.
- the purging main pipeline is connected to There is a micro-pressure purge branch and a regular purge branch between each acoustic temperature measuring element. The purge pressure and air volume of the regular purge branch are higher than those of the micro-pressure purge branch;
- the manual valve of the main pipeline is opened, and the compressed air in the pressure stabilizing tank reaches each acoustic temperature measuring element through the main purge pipeline.
- the manual valve of the main pipeline is opened, and the compressed air in the pressure stabilizing tank reaches each acoustic temperature measuring element through the main purge pipeline.
- it is connected to each micro-pressure purge branch and the regular purge branch to achieve purging. , by controlling the air volume on the micro-pressure purge branch to keep the static pressure in the acoustic wave tube of the acoustic temperature measurement element at a micro-positive pressure.
- the air inlet of the pressure stabilizing tank is set in the middle and lower part of the tank, and its air outlet is set in the upper part of the tank.
- the compressed air for instrumentation provided by the power plant is connected to the pressure stabilizing tank through a metal pipe.
- the compressed air for instrumentation contains water, , the moisture will remain in the middle and lower part of the surge tank and be discharged from the surge tank through the automatic drain valve, and will not enter the downstream purge pipeline.
- a pressure regulating valve regulating branch and a manual valve regulating branch are installed on the micro-pressure purging branch, and the downstream of the pressure regulating valve regulating branch and the manual valve regulating branch are connected to the acoustic temperature measuring element. at the sonic tube.
- the regulating branch of the pressure regulating valve is equipped with a micro-pressure purging branch pressure regulating valve.
- the air volume of the regulating valve regulating branch is set. For a small flow rate, keep the static pressure in the sonic wave tube at a slightly positive pressure to prevent dust in the flue gas from entering the sonic wave tube when there is a local slight positive pressure in the furnace.
- the manual valve regulating branch is equipped with a micro-pressure purging branch manual valve for on-site manual purging.
- the purging air volume is increased to promptly blow away the dust accumulated in the sonic tube.
- the periodic purging branch manual valve and the periodic purging branch solenoid valve are sequentially provided on the periodic purging branch, and the periodic purging branch solenoid valve is connected downstream to the acoustic wave conduit of the acoustic temperature measuring element.
- the compressed air in the periodic purge branch passes through the periodic purge branch manual valve and the periodic purge branch solenoid valve in turn and then enters the sonic tube.
- the air output of the periodic purge branch is manually adjusted through the periodic purge branch manual valve. .
- the periodic purging branch solenoid valve is connected to the purging controller through the periodic purging branch solenoid valve line.
- a pressure sensor is installed on the sonic wave conduit, and the pressure sensor is connected to the purge controller through a pressure sensor line in the sonic wave conduit.
- the sonic wave conduit includes a component connecting flange, a sonic wave conduit cavity, an internal cavity of a light air volume positive pressure isolation air duct, a swirl purge air duct and a pipe base connecting flange.
- the sonic wave conduit cavity One end is provided with a component connecting flange, which is used to connect and fix the acoustic temperature measurement component.
- the opposite end of the sonic wave conduit cavity is provided with a pipe base connecting flange.
- the entire sonic wave conduit cavity is a 90° arc-shaped elbow.
- the other end of the sonic wave tube cavity is equipped with an internal cavity of a gentle air volume positive pressure isolation air duct, several swirling flow purge air ducts and several micro air volume positive pressure isolation air duct entrances.
- the inside of the sonic wave tube cavity is connected with the swirl flow
- the purge air duct is connected, the inlet of the gentle air volume positive pressure isolation air duct is connected with the internal cavity of the gentle air volume positive pressure isolation air duct, and the outlet of the gentle air volume positive pressure isolation air duct is provided on the internal cavity of the breeze volume positive pressure isolation air duct.
- the air outlet of the low-volume positive-pressure isolation air duct is connected to the internal cavity of the sonic wave conduit provided inside the sonic wave conduit cavity, and the compressed air enters the sonic wave conduit cavity tangentially along the circumferential direction from the swirl purge air duct.
- the purge air passes through the cyclone purge air duct to form a cyclone purge air.
- a small amount of compressed air enters the internal cavity of the breeze volume positive pressure isolation air duct through the entrance of the breeze volume positive pressure isolation air duct, and then passes through the breeze volume positive pressure isolation air duct.
- the air outlet enters the internal cavity of the sonic wave conduit, forming a rigid air curtain at the head of the sonic wave conduit to maintain a slight positive pressure at the head of the sonic wave conduit.
- a method of using the anti-clogging purging system of acoustic temperature measurement equipment for coal-fired boilers including the following steps:
- the main pipeline manual valve, periodic purge branch solenoid valve, periodic purge branch manual valve, micro-pressure purge branch manual valve, and micro-pressure purge branch pressure regulating valve are open, and the pressure in the pressure stabilizing tank The compressed air reaches each acoustic temperature measuring element through the purge main pipeline;
- the purging controller controls the on and off of the solenoid valve of the regular purge branch according to the purge program, so as to realize the purge of the sonic tube connected to it by the regular purge branch.
- the micro-pressure purge Check the branch pressure regulating valve and observe the pressure value. Set the pressure regulating valve to adjust the branch air volume to a smaller flow rate.
- the sonic wave conduit is manually purged on-site through the manual valve of the micro-pressure purge branch.
- the purge air volume is increased to promptly blow away the dust accumulated in the sonic wave conduit.
- the purge controller receives the pressure sensor in the sonic wave conduit.
- the tested parameters are based on the speed of the pressure drop after purging to determine whether the inside of the measuring hole is unobstructed.
- the pressure drop speed in the pressure transmission pipe of an acoustic temperature measuring element slows down, the next regular purge time of the acoustic temperature measuring element will be increased. To keep the measuring hole open.
- the invention discloses an anti-blocking and purging system for acoustic temperature measurement equipment of coal-fired boilers and a method of use.
- the system includes: an automatic drainage pressure stabilizing tank.
- the automatic drainage pressure stabilizing tank includes a pressure stabilizing tank and an automatic drainage valve connected thereto.
- the pressure stabilizing tank is filled with compressed air to maintain pressure for downstream purge gas;
- the purge main pipeline is connected to the pressure stabilizing tank upstream, and to each acoustic temperature measuring element downstream.
- a main pipeline manual valve is set between the pressure tank and the purge main pipeline.
- a micro-pressure purge branch and a regular purge branch are set between the purge main pipe and each acoustic temperature measuring element. The regular purge branch is purged.
- the pressure and air volume are higher than those of the micro-pressure purge branch; during normal operation, the manual valve of the main pipeline is opened, and the compressed air in the pressure tank reaches each acoustic temperature measuring element through the purge main pipeline, and is connected to each micro-pressure component on the way. Purge the branch and periodically purge the branch. By controlling the air volume on the micro-pressure purge branch, the static pressure in the acoustic wave tube of the acoustic temperature measuring element is maintained at a slightly positive pressure.
- the anti-blocking purging system and usage method of the coal-fired boiler acoustic temperature measurement equipment provided by the invention realize purging through a micro-pressure purging branch and a regular purging branch.
- Figure 1 is a schematic structural diagram of the present invention
- Figure 2 is a schematic diagram of the purge branch arrangement of the present invention.
- Figure 3 is a schematic three-dimensional structural diagram of the acoustic waveguide of the present invention.
- Figure 4 is a cross-sectional view of the internal structure of the acoustic waveguide of the present invention.
- Figure 5 is a cross-sectional view in Figure 4 of the present invention
- Figure a is a cross-sectional view of A-A in Figure 4 of the present invention
- Figure b is a cross-sectional view of B-B in Figure 4 of the present invention
- Figure c is a cross-sectional view of C-C in Figure 4 of the present invention.
- an anti-clogging purge system for coal-fired boiler acoustic temperature measurement equipment includes:
- a pressure sensor is installed on the sonic wave conduit 7, which can measure the internal static pressure parameters of the sonic wave conduit 7, and is connected to the purge controller 10 through the pressure sensor line 9 in the sonic wave conduit.
- the purge controller 10 is a PLC written in the program. Through the built-in purge program, the purge controller 10 is responsible for completing the regular purge settings. Through the built-in purge program, it controls the passage of the solenoid valve 11 of the periodic purge branch. shut off and achieve regular purging. According to the measurement sequence of the acoustic temperature measurement equipment, the regular purge branch 6 is controlled to purge the acoustic wave tubes 7 one by one during the measurement interval. According to the measurement sequence of the acoustic temperature measurement equipment, the regular purge branches are controlled to purge the acoustic wave tubes one by one during the measurement interval.
- the flange 75 is used to integrally connect and fix the acoustic wave conduit to the temperature measurement tube holder on the water-cooling wall.
- the entire acoustic wave conduit cavity 72 has a 90° arc-shaped elbow structure, and the acoustic temperature measurement primary element is installed vertically downward.
- the dust in the acoustic wave tube cavity 72 is not easy to enter the interior of the acoustic temperature measurement primary element due to its own weight.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
An anti-blocking purging system for an acoustic temperature measurement device of a coal-fired boiler, and a method for using same. The anti-blocking purging system comprises an automatic drainage pressure stabilization tank, which maintains the pressure of a downstream purging gas; and a purging main pipeline (4), wherein a micro-pressure purging branch (5) and a periodic purging branch (6) are provided between the purging main pipeline (4) and each acoustic temperature measurement element, and the purging pressure and gas amount of the periodic purging branch (6) are both greater than those of the micro-pressure purging branch (5). A pressure regulating valve regulation branch and a manual valve regulation branch are installed on the micro-pressure purging branch (5), wherein the pressure regulating valve regulation branch is provided with a micro-pressure purging branch pressure regulating valve (14), and the manual valve regulation branch is provided with a micro-pressure purging branch manual valve (13); and the periodic purging branch (6) is provided with a periodic purging branch manual valve (12) and a periodic purging branch electromagnetic valve (11). By means of the turning on-off of manual valves and electromagnetic valves, the anti-blocking purging system can realize periodic and quantitative purging to blow away accumulated dust in acoustic waveguides (7) in a timely manner, can determine, according to a pressure falling speed after purging, whether the interiors of measurement holes are unblocked, so as to adjust the periodic purging time of acoustic temperature measurement elements in a timely manner, and has a high intelligence level and a good anti-blocking purging effect.
Description
本发明属于声学测温技术领域，具体涉及一种燃煤锅炉声学测温设备的防堵吹扫系统及使用方法。The invention belongs to the technical field of acoustic temperature measurement, and specifically relates to an anti-blocking and purging system of acoustic temperature measurement equipment for coal-fired boilers and a method of use.
目前燃煤锅炉大多仍采用高温探针热电偶等接触式测温方法测量炉膛内高温烟气温度，随着声学测温技术的发展，目前已有部分燃煤锅炉应用声学测温设备测量炉膛内高温烟气温度。At present, most coal-fired boilers still use contact temperature measurement methods such as high-temperature probe thermocouples to measure the high-temperature flue gas temperature in the furnace. With the development of acoustic temperature measurement technology, some coal-fired boilers currently use acoustic temperature measurement equipment to measure the temperature inside the furnace. High temperature flue gas temperature.
由于燃煤锅炉的燃料为动力煤，炉膛内烟气含灰量较高，灰尘若进入声学测温设备的测量元件内可能导致测量元件损坏，测孔长期积灰还容易导致声学测温孔堵塞，当炉内火焰偏斜还可能发生结焦堵灰或局部高温导致元件损坏的情况，为了声学测温设备长周期稳定运行，需要同步布置防堵吹扫系统。 Since the fuel of coal-fired boilers is thermal coal, the flue gas in the furnace has a high ash content. If dust enters the measuring element of the acoustic temperature measurement equipment, it may cause damage to the measuring element. Long-term dust accumulation in the measuring hole may also easily cause the acoustic temperature measuring hole to be blocked. , when the flame in the furnace is deflected, coking and ash blocking or local high temperature may cause component damage. In order to ensure the long-term stable operation of the acoustic temperature measurement equipment, an anti-blocking and purging system needs to be arranged simultaneously.
如果在每个声学测温元件处常通仪用压缩空气吹扫防堵，流量设置不合理会造成大量能源浪费或影响防堵效果。当电厂上游仪用空压机出现除水故障时，仪用空气带水可能损坏声学测温元件。当上游气源压力不稳定时，防堵吹扫效果还可能受到影响。If compressed air is used to purge each acoustic temperature measuring element to prevent clogging, unreasonable flow settings will cause a lot of energy waste or affect the anti-clogging effect. When the instrument air compressor upstream of the power plant has a water removal failure, water in the instrument air may damage the acoustic temperature measuring element. When the upstream air source pressure is unstable, the anti-blocking and purging effect may also be affected.
为解决现有技术中存在的技术问题，本发明的目的在于提供一种燃煤锅炉声学测温设备的防堵吹扫系统及使用方法。 In order to solve the technical problems existing in the prior art, the purpose of the present invention is to provide an anti-blocking purging system and a usage method for acoustic temperature measurement equipment of coal-fired boilers.
为实现上述目的，达到上述技术效果，本发明采用的技术方案为： In order to achieve the above purpose and achieve the above technical effect, the technical solution adopted by the present invention is:
一种燃煤锅炉声学测温设备的防堵吹扫系统，包括： An anti-clogging purge system for coal-fired boiler acoustic temperature measurement equipment, including:
自动排水稳压罐，所述自动排水稳压罐包括稳压罐及与其相连通的自动排水阀，所述稳压罐内充满压缩空气，为下游吹扫用气保压； Automatic drainage pressure stabilizing tank. The automatic drainage pressure stabilizing tank includes a pressure stabilizing tank and an automatic drainage valve connected thereto. The pressure stabilizing tank is filled with compressed air to maintain pressure for downstream purge air;
吹扫总管路，所述吹扫总管路上游接稳压罐，下游接至各个声学测温元件处，所述稳压罐与吹扫总管路之间设置总管路手动阀，吹扫总管路与各个声学测温元件之间设置有微压吹扫支路和定期吹扫支路，定期吹扫支路的吹扫压力和气量均较微压吹扫支路高； Purge the main pipeline. The upstream of the purge main pipeline is connected to a pressure stabilizing tank, and the downstream is connected to each acoustic temperature measuring element. A main pipeline manual valve is set between the pressure stabilizing tank and the purging main pipeline. The purging main pipeline is connected to There is a micro-pressure purge branch and a regular purge branch between each acoustic temperature measuring element. The purge pressure and air volume of the regular purge branch are higher than those of the micro-pressure purge branch;
正常运行时，总管路手动阀打开，稳压罐内的压缩空气经吹扫总管路到达各声学测温元件处，途中分别接至各微压吹扫支路和定期吹扫支路实现吹扫，通过控制微压吹扫支路上的气量保持声学测温元件的声波导管内静压为微正压。 During normal operation, the manual valve of the main pipeline is opened, and the compressed air in the pressure stabilizing tank reaches each acoustic temperature measuring element through the main purge pipeline. On the way, it is connected to each micro-pressure purge branch and the regular purge branch to achieve purging. , by controlling the air volume on the micro-pressure purge branch to keep the static pressure in the acoustic wave tube of the acoustic temperature measurement element at a micro-positive pressure.
进一步的，所述稳压罐的进气口设置在罐体中下部，其出气口设置在罐体上部，电厂提供的仪用压缩空气经金属管道接至稳压罐，当仪用压缩空气含水时，水分将留在稳压罐中下部并通过自动排水阀排出稳压罐，不会进入下游吹扫管路。 Further, the air inlet of the pressure stabilizing tank is set in the middle and lower part of the tank, and its air outlet is set in the upper part of the tank. The compressed air for instrumentation provided by the power plant is connected to the pressure stabilizing tank through a metal pipe. When the compressed air for instrumentation contains water, , the moisture will remain in the middle and lower part of the surge tank and be discharged from the surge tank through the automatic drain valve, and will not enter the downstream purge pipeline.
进一步的，所述微压吹扫支路上安装有调压阀调节支路和手动阀调节支路，所述调压阀调节支路和手动阀调节支路的下游均接至声学测温元件的声波导管处。 Further, a pressure regulating valve regulating branch and a manual valve regulating branch are installed on the micro-pressure purging branch, and the downstream of the pressure regulating valve regulating branch and the manual valve regulating branch are connected to the acoustic temperature measuring element. at the sonic tube.
进一步的，所述调压阀调节支路装有微压吹扫支路调压阀，通过调整微压吹扫支路调压阀和观察压力表数值，将调压阀调节支路气量设定为较小流量，保持声波导管内静压为微正压，防止炉膛内局部微正压时烟气中的灰尘进入声波导管。 Further, the regulating branch of the pressure regulating valve is equipped with a micro-pressure purging branch pressure regulating valve. By adjusting the micro-pressure purging branch pressure regulating valve and observing the pressure gauge value, the air volume of the regulating valve regulating branch is set. For a small flow rate, keep the static pressure in the sonic wave tube at a slightly positive pressure to prevent dust in the flue gas from entering the sonic wave tube when there is a local slight positive pressure in the furnace.
进一步的，所述手动阀调节支路装有微压吹扫支路手动阀，用于现场人工吹扫，当出现明确堵塞时加大吹扫气量，及时吹走声波导管内积灰。 Furthermore, the manual valve regulating branch is equipped with a micro-pressure purging branch manual valve for on-site manual purging. When a clear blockage occurs, the purging air volume is increased to promptly blow away the dust accumulated in the sonic tube.
进一步的，所述定期吹扫支路上顺序设置有定期吹扫支路手动阀和定期吹扫支路电磁阀，所述定期吹扫支路电磁阀下游接至声学测温元件的声波导管处，定期吹扫支路中的压缩空气依次经定期吹扫支路手动阀和定期吹扫支路电磁阀后进入声波导管中，通过定期吹扫支路手动阀手动调节定期吹扫支路的出气量。 Further, the periodic purging branch manual valve and the periodic purging branch solenoid valve are sequentially provided on the periodic purging branch, and the periodic purging branch solenoid valve is connected downstream to the acoustic wave conduit of the acoustic temperature measuring element. The compressed air in the periodic purge branch passes through the periodic purge branch manual valve and the periodic purge branch solenoid valve in turn and then enters the sonic tube. The air output of the periodic purge branch is manually adjusted through the periodic purge branch manual valve. .
进一步的，所述定期吹扫支路电磁阀通过定期吹扫支路电磁阀线路连接至吹扫控制器。 Further, the periodic purging branch solenoid valve is connected to the purging controller through the periodic purging branch solenoid valve line.
进一步的，所述声波导管上安装有压力传感器，所述压力传感器通过声波导管内压力传感器线路连接至吹扫控制器。 Further, a pressure sensor is installed on the sonic wave conduit, and the pressure sensor is connected to the purge controller through a pressure sensor line in the sonic wave conduit.
进一步的，所述声波导管包括元件连接法兰、声波导管腔体、微风量正压隔绝风道内部腔体、旋流吹扫风道和管座连接法兰，所述声波导管腔体一端设置元件连接法兰，元件连接法兰用于连接固定声学测温元件，声波导管腔体相对的另一端设置管座连接法兰，声波导管腔体整体呈90°圆弧形弯头结构，声波导管腔体另一端设置微风量正压隔绝风道内部腔体、若干个旋流吹扫风道和若干个微风量正压隔绝风道入口，声波导管腔体内部与旋流吹扫风道相连通，微风量正压隔绝风道入口与微风量正压隔绝风道内部腔体相连通，微风量正压隔绝风道内部腔体上开设微风量正压隔绝风道出风口，微风量正压隔绝风道出风口与设置于声波导管腔体内部的声波导管内部空腔相连通，压缩空气从旋流吹扫风道沿圆周方向切向进入声波导管腔体内部，吹扫风经过旋流吹扫风道形成旋流吹扫风，少量压缩空气经过微风量正压隔绝风道入口进入微风量正压隔绝风道内部腔体内，再经由微风量正压隔绝风道出风口进入声波导管内部空腔内，在声波导管内部头部形成刚性风幕，保持声波导管头部微正压。 Further, the sonic wave conduit includes a component connecting flange, a sonic wave conduit cavity, an internal cavity of a light air volume positive pressure isolation air duct, a swirl purge air duct and a pipe base connecting flange. The sonic wave conduit cavity One end is provided with a component connecting flange, which is used to connect and fix the acoustic temperature measurement component. The opposite end of the sonic wave conduit cavity is provided with a pipe base connecting flange. The entire sonic wave conduit cavity is a 90° arc-shaped elbow. Structure, the other end of the sonic wave tube cavity is equipped with an internal cavity of a gentle air volume positive pressure isolation air duct, several swirling flow purge air ducts and several micro air volume positive pressure isolation air duct entrances. The inside of the sonic wave tube cavity is connected with the swirl flow The purge air duct is connected, the inlet of the gentle air volume positive pressure isolation air duct is connected with the internal cavity of the gentle air volume positive pressure isolation air duct, and the outlet of the gentle air volume positive pressure isolation air duct is provided on the internal cavity of the breeze volume positive pressure isolation air duct. , the air outlet of the low-volume positive-pressure isolation air duct is connected to the internal cavity of the sonic wave conduit provided inside the sonic wave conduit cavity, and the compressed air enters the sonic wave conduit cavity tangentially along the circumferential direction from the swirl purge air duct. The purge air passes through the cyclone purge air duct to form a cyclone purge air. A small amount of compressed air enters the internal cavity of the breeze volume positive pressure isolation air duct through the entrance of the breeze volume positive pressure isolation air duct, and then passes through the breeze volume positive pressure isolation air duct. The air outlet enters the internal cavity of the sonic wave conduit, forming a rigid air curtain at the head of the sonic wave conduit to maintain a slight positive pressure at the head of the sonic wave conduit.
一种燃煤锅炉声学测温设备的防堵吹扫系统的使用方法，包括以下步骤： A method of using the anti-clogging purging system of acoustic temperature measurement equipment for coal-fired boilers, including the following steps:
正常运行时，总管路手动阀、定期吹扫支路电磁阀、定期吹扫支路手动阀、微压吹扫支路手动阀、微压吹扫支路调压阀打开，稳压罐内的压缩空气经吹扫总管路到达各声学测温元件处； During normal operation, the main pipeline manual valve, periodic purge branch solenoid valve, periodic purge branch manual valve, micro-pressure purge branch manual valve, and micro-pressure purge branch pressure regulating valve are open, and the pressure in the pressure stabilizing tank The compressed air reaches each acoustic temperature measuring element through the purge main pipeline;
需要吹扫时，通过吹扫控制器设置吹扫程序，通过定期吹扫支路手动阀手动调节定期吹扫支路的出气量，调节完毕后日常运行时无需调整，根据声学测温元件的测量顺序，在测量间隔时间内，吹扫控制器按照吹扫程序控制定期吹扫支路电磁阀的通断，实现定期吹扫支路对与其连通的声波导管的吹扫，通过调整微压吹扫支路调压阀和观察压力数值，将调压阀调节支路气量设定为较小流量，保持声波导管内静压为微正压，防止炉膛内局部微正压时烟气中的灰尘进入声波导管，通过微压吹扫支路手动阀进行现场人工吹扫，当出现明确堵塞时加大吹扫气量，及时吹走声波导管内积灰，同时，吹扫控制器接收声波导管内的压力传感器检测的参数，根据吹扫后压力回落的速度，判断测孔内部是否通畅，当某个声学测温元件传压管内压力回落速度变慢时将增加该声学测温元件下次定期吹扫时间，以保持测孔通畅。 When purging is required, set the purging program through the purging controller, and manually adjust the air outlet volume of the periodic purging branch through the periodic purging branch manual valve. After the adjustment is completed, no adjustment is needed during daily operation. According to the measurement of the acoustic temperature measuring element sequence, during the measurement interval, the purge controller controls the on and off of the solenoid valve of the regular purge branch according to the purge program, so as to realize the purge of the sonic tube connected to it by the regular purge branch. By adjusting the micro-pressure purge Check the branch pressure regulating valve and observe the pressure value. Set the pressure regulating valve to adjust the branch air volume to a smaller flow rate. Keep the static pressure in the sonic tube at a slightly positive pressure to prevent dust in the flue gas from entering when there is a local slight positive pressure in the furnace. The sonic wave conduit is manually purged on-site through the manual valve of the micro-pressure purge branch. When a clear blockage occurs, the purge air volume is increased to promptly blow away the dust accumulated in the sonic wave conduit. At the same time, the purge controller receives the pressure sensor in the sonic wave conduit. The tested parameters are based on the speed of the pressure drop after purging to determine whether the inside of the measuring hole is unobstructed. When the pressure drop speed in the pressure transmission pipe of an acoustic temperature measuring element slows down, the next regular purge time of the acoustic temperature measuring element will be increased. To keep the measuring hole open.
与现有技术相比，本发明的有益效果为： Compared with the existing technology, the beneficial effects of the present invention are:
本发明公开了一种燃煤锅炉声学测温设备的防堵吹扫系统及使用方法，该系统包括：自动排水稳压罐，自动排水稳压罐包括稳压罐及与其相连通的自动排水阀，所述稳压罐内充满压缩空气，为下游吹扫用气保压；吹扫总管路，所述吹扫总管路上游接稳压罐，下游接至各个声学测温元件处，所述稳压罐与吹扫总管路之间设置总管路手动阀，吹扫总管路与各个声学测温元件之间设置有微压吹扫支路和定期吹扫支路，定期吹扫支路的吹扫压力和气量均较微压吹扫支路高；正常运行时，总管路手动阀打开，稳压罐内的压缩空气经吹扫总管路到达各声学测温元件处，途中分别接至各微压吹扫支路和定期吹扫支路，通过控制微压吹扫支路上的气量保持声学测温元件的声波导管内静压为微正压。本发明提供的燃煤锅炉声学测温设备的防堵吹扫系统及使用方法，通过微压吹扫支路和定期吹扫支路实现吹扫，微压吹扫支路上安装有调压阀调节支路和手动阀调节支路，调压阀调节支路装有微压吹扫支路调压阀，手动阀调节支路装有微压吹扫支路手动阀，定期吹扫支路上设置有定期吹扫支路手动阀和定期吹扫支路电磁阀，通过手动阀、电磁阀的通断控制实现定期定量吹扫，能够及时吹走声波导管内积灰，且能够根据吹扫后压力回落的速度，判断测孔内部是否通畅，及时调整声学测温元件的定期吹扫时间，确保测孔通畅，智能化水平高，吹扫效率高，可达到满意的防堵吹扫效果。The invention discloses an anti-blocking and purging system for acoustic temperature measurement equipment of coal-fired boilers and a method of use. The system includes: an automatic drainage pressure stabilizing tank. The automatic drainage pressure stabilizing tank includes a pressure stabilizing tank and an automatic drainage valve connected thereto. , the pressure stabilizing tank is filled with compressed air to maintain pressure for downstream purge gas; the purge main pipeline is connected to the pressure stabilizing tank upstream, and to each acoustic temperature measuring element downstream. A main pipeline manual valve is set between the pressure tank and the purge main pipeline. A micro-pressure purge branch and a regular purge branch are set between the purge main pipe and each acoustic temperature measuring element. The regular purge branch is purged. The pressure and air volume are higher than those of the micro-pressure purge branch; during normal operation, the manual valve of the main pipeline is opened, and the compressed air in the pressure tank reaches each acoustic temperature measuring element through the purge main pipeline, and is connected to each micro-pressure component on the way. Purge the branch and periodically purge the branch. By controlling the air volume on the micro-pressure purge branch, the static pressure in the acoustic wave tube of the acoustic temperature measuring element is maintained at a slightly positive pressure. The anti-blocking purging system and usage method of the coal-fired boiler acoustic temperature measurement equipment provided by the invention realize purging through a micro-pressure purging branch and a regular purging branch. The micro-pressure purging branch is equipped with a pressure regulating valve for regulation. The branch and manual valve regulate the branch. The pressure regulating valve regulating branch is equipped with a micro-pressure purging branch pressure regulating valve. The manual valve regulating branch is equipped with a micro-pressure purging branch manual valve. The regular purging branch is equipped with a Regularly purge the branch manual valve and regularly purge the branch solenoid valve. Regular quantitative purging is achieved through the on-off control of the manual valve and solenoid valve, which can promptly blow away the dust accumulated in the sonic conduit, and can return according to the pressure after purging. speed, determine whether the inside of the measuring hole is unobstructed, and timely adjust the periodic purging time of the acoustic temperature measuring element to ensure that the measuring hole is unobstructed, with a high level of intelligence and high purging efficiency, which can achieve a satisfactory anti-blocking and purging effect.
图1为本发明的结构示意图； Figure 1 is a schematic structural diagram of the present invention;
图2为本发明的吹扫支路布置示意图； Figure 2 is a schematic diagram of the purge branch arrangement of the present invention;
图3为本发明的声波导管的立体结构示意图； Figure 3 is a schematic three-dimensional structural diagram of the acoustic waveguide of the present invention;
图4为本发明的声波导管的内部结构剖视图； Figure 4 is a cross-sectional view of the internal structure of the acoustic waveguide of the present invention;
图5为本发明图4中的剖视图；其中，图a为本发明图4中A-A剖视图；图b为本发明图4中B-B剖视图；图c为本发明图4中C-C剖视图。Figure 5 is a cross-sectional view in Figure 4 of the present invention; Figure a is a cross-sectional view of A-A in Figure 4 of the present invention; Figure b is a cross-sectional view of B-B in Figure 4 of the present invention; Figure c is a cross-sectional view of C-C in Figure 4 of the present invention.
下面对本发明进行详细阐述，以使本发明的优点和特征能更易于被本领域技术人员理解，从而对本发明的保护范围做出更为清楚明确的界定。 The present invention is described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.
以下给出一个或多个方面的简要概述以提供对这些方面的基本理解。此概述不是所有构想到的方面的详尽综览，并且既非旨在指认出所有方面的关键性或决定性要素亦非试图界定任何或所有方面的范围。其唯一的目的是要以简化形式给出一个或多个方面的一些概念以为稍后给出的更加详细的描述之序。 A brief overview of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all contemplated aspects and is intended to neither identify key or critical elements of all aspects nor attempt to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
在本发明的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。 In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", " The orientation or positional relationship indicated by "outside" and so on is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation. Specific orientations of construction and operation are therefore not to be construed as limitations of the invention.
如图1-5所示，一种燃煤锅炉声学测温设备的防堵吹扫系统，包括： As shown in Figure 1-5, an anti-clogging purge system for coal-fired boiler acoustic temperature measurement equipment includes:
自动排水稳压罐，该自动排水稳压罐包括稳压罐1和自动排水阀2，电厂提供的仪用压缩空气经金属管道接至稳压罐1，稳压罐1内充满压缩空气后将保持恒定高压力，为下游吹扫用气保压，稳压罐1的进气口设置在罐体中下部，其出气口设置在罐体上部，当仪用压缩空气含水时，水分将留在稳压罐1中下部，达到一定量将通过自动排水阀2排出稳压罐1，不会进入下游吹扫管路； Automatic drainage pressure stabilizing tank. The automatic drainage pressure stabilizing tank includes a pressure stabilizing tank 1 and an automatic drainage valve 2. The instrument compressed air provided by the power plant is connected to the pressure stabilizing tank 1 through a metal pipeline. After the pressure stabilizing tank 1 is filled with compressed air, it will Maintain a constant high pressure to maintain pressure for downstream purging gas. The air inlet of the pressure stabilizing tank 1 is set in the middle and lower part of the tank, and its air outlet is set in the upper part of the tank. When the compressed air used for the instrument contains water, the water will remain in it. In the middle and lower part of the pressure stabilizing tank 1, when a certain amount is reached, the pressure stabilizing tank 1 will be discharged through the automatic drain valve 2 and will not enter the downstream purge pipeline;
吹扫总管路4，其为由金属管道焊接构成的压缩空气输送管路，上游接稳压罐1，下游接至各个声学测温元件处，吹扫总管路末端采用三通管道转换为两个支路，分别为微压吹扫支路5和定期吹扫支路6，稳压罐1与吹扫总管路4之间设置总管路手动阀3，总管路手动阀3在机组停机降温后可手动关闭，进而关闭供气管路，减少不必要的耗气，正常运行时，总管路手动阀3打开，稳压罐1内的压缩空气经吹扫总管路4到达各声学测温元件处，途中经三通管道分别接至各微压吹扫支路5和定期吹扫支路6。 The purge main pipeline 4 is a compressed air transportation pipeline composed of welded metal pipes. The upstream is connected to the pressure stabilizing tank 1, and the downstream is connected to each acoustic temperature measuring element. The end of the purge main pipeline is converted into two using a three-way pipe. The branches are respectively micro-pressure purge branch 5 and regular purge branch 6. The main pipeline manual valve 3 is set between the pressure stabilizing tank 1 and the purge main pipeline 4. The main pipeline manual valve 3 can be activated after the unit is shut down and cooled down. Manually close, and then close the air supply pipeline to reduce unnecessary air consumption. During normal operation, the manual valve 3 of the main pipeline is opened, and the compressed air in the pressure stabilizing tank 1 reaches each acoustic temperature measuring element through the purge main pipeline 4. It is connected to each micro-pressure purge branch 5 and regular purge branch 6 through tee pipes.
作为具体的一种实施方式，微压吹扫支路5上安装有调压阀调节支路和手动阀调节支路，下游均接至声学测温元件的声波导管7(声学测温传声装置)处。其中，调压阀调节支路装有微压吹扫支路调压阀14，通过调整微压吹扫支路调压阀14和观察压力表数值，将调压阀调节支路气量设定为较小流量，目的是通过较小的耗气量保持声波导管7内静压为微正压，防止炉膛内局部微正压时烟气中的灰尘进入声波导管7。手动阀调节支路装有微压吹扫支路手动阀13，用于现场人工吹扫，当出现明确堵塞时加大吹扫气量，及时吹走声波导管7内积灰。 As a specific embodiment, the micro-pressure purge branch 5 is equipped with a pressure regulating valve regulating branch and a manual valve regulating branch, and the downstream is connected to the acoustic wave conduit 7 (acoustic temperature measurement and sound transmission device) of the acoustic temperature measurement element. . Among them, the pressure regulating valve regulating branch is equipped with a micro-pressure purging branch pressure regulating valve 14. By adjusting the micro-pressure purging branch pressure regulating valve 14 and observing the pressure gauge value, the pressure regulating valve regulating branch air volume is set to The purpose of the smaller flow rate is to maintain the static pressure in the sonic wave conduit 7 at a slightly positive pressure through a small air consumption, and to prevent dust in the flue gas from entering the sonic wave conduit 7 when there is a local slight positive pressure in the furnace. The manual valve regulating branch is equipped with a micro-pressure purging branch manual valve 13, which is used for on-site manual purging. When a clear blockage occurs, the purging air volume is increased to promptly blow away the dust accumulated in the sonic tube 7.
定期吹扫支路6上设置有定期吹扫支路手动阀12和定期吹扫支路电磁阀11，定期吹扫支路电磁阀11下游接至声学测温元件的声波导管7处，定期吹扫支路6中的压缩空气依次经定期吹扫支路手动阀12和定期吹扫支路电磁阀11后进入声波导管7中。根据压缩空气压力参数调整定期吹扫支路手动阀12到合适的开度以满足单次吹扫的压力要求，通过定期吹扫支路电磁阀11控制单次吹扫的开始和结束。定期吹扫支路手动阀12用来手动调节定期吹扫支路6的出气量，调节完毕后日常运行时无需调整。定期吹扫支路电磁阀11 通过定期吹扫支路电磁阀线路8连接至吹扫控制器10。定期吹扫支路6的吹扫压力和气量均较微压吹扫支路5高，定期吹扫的目的是防止测孔内部被积灰或焦块堵住。 The periodic purging branch 6 is provided with a periodic purging branch manual valve 12 and a periodic purging branch solenoid valve 11. The periodic purging branch solenoid valve 11 is connected downstream to the acoustic wave conduit 7 of the acoustic temperature measuring element. The compressed air in the purge branch 6 passes through the regular purge branch manual valve 12 and the regular purge branch solenoid valve 11 and then enters the sonic wave conduit 7 . According to the compressed air pressure parameters, adjust the periodic purge branch manual valve 12 to a suitable opening to meet the pressure requirement of a single purge, and control the start and end of a single purge through the periodic purge branch solenoid valve 11. The manual valve 12 of the periodic purge branch is used to manually adjust the air output of the periodic purge branch 6. After the adjustment is completed, no adjustment is needed during daily operation. The periodic purging branch solenoid valve 11 is connected to the purging controller 10 through the periodic purging branch solenoid valve line 8. The purging pressure and air volume of the regular purging branch 6 are higher than those of the micro-pressure purging branch 5. The purpose of regular purging is to prevent the inside of the measuring hole from being blocked by dust accumulation or coke.
声波导管7上安装有压力传感器，可以测量声波导管7内部静压参数，通过声波导管内压力传感器线路9连接至吹扫控制器10。 A pressure sensor is installed on the sonic wave conduit 7, which can measure the internal static pressure parameters of the sonic wave conduit 7, and is connected to the purge controller 10 through the pressure sensor line 9 in the sonic wave conduit.
吹扫控制器10为写入程序的PLC，通过内置吹扫程序，通过吹扫控制器10负责完成定期吹扫设定，通过内置吹扫程序，控制控制定期吹扫支路电磁阀11的通断，实现定期吹扫。根据声学测温设备的测量顺序，在测量间隔时间内控制定期吹扫支路6对声波导管7 逐个进行吹扫。根据声学测温设备的测量顺序，在测量间隔时间内控制定期吹扫支路对声波导管逐个进行吹扫。同时，吹扫控制器10接入声波导管7内的压力传感器参数，根据吹扫后压力回落的速度，判断测孔内部是否通畅，当某个测温元件传压管内压力回落速度变慢时(即开始出现局部堵塞)将增加该测温元件下次定期吹扫时间，以保持测孔通畅。 The purge controller 10 is a PLC written in the program. Through the built-in purge program, the purge controller 10 is responsible for completing the regular purge settings. Through the built-in purge program, it controls the passage of the solenoid valve 11 of the periodic purge branch. shut off and achieve regular purging. According to the measurement sequence of the acoustic temperature measurement equipment, the regular purge branch 6 is controlled to purge the acoustic wave tubes 7 one by one during the measurement interval. According to the measurement sequence of the acoustic temperature measurement equipment, the regular purge branches are controlled to purge the acoustic wave tubes one by one during the measurement interval. At the same time, the purge controller 10 is connected to the pressure sensor parameters in the sonic wave conduit 7, and determines whether the inside of the measuring hole is smooth based on the speed of the pressure drop after the purge. When the pressure drop speed in the pressure transmission pipe of a certain temperature measuring element slows down ( That is, if local blockage begins to occur), the next regular purge time of the temperature measuring element will be increased to keep the measuring hole clear.
作为具体的一种实施方式，声波导管7包括元件连接法兰71、声波导管腔体72、旋流吹扫风道74和管座连接法兰75等，其中，声波导管腔体72一端设置元件连接法兰71，元件连接法兰71用于连接固定声学测温元件(发声元件或收声元件)，声波导管腔体72 相对的另一端设置管座连接法兰75，管座连接法兰75用于将声波导管整体连接固定在水冷壁上的测温管座上，声波导管腔体72整体呈90°圆弧形弯头结构，声学测温一次元件竖直朝下安装，声波导管腔体72内灰尘受自重影响不易进入声学测温一次元件内部。 As a specific embodiment, the acoustic waveguide 7 includes a component connecting flange 71 , an acoustic waveguide cavity 72 , a swirl purge air duct 74 , a tube base connecting flange 75 , etc., wherein one end of the acoustic waveguide cavity 72 An element connecting flange 71 is provided. The element connecting flange 71 is used to connect and fix the acoustic temperature measurement element (sound emitting element or sound receiving element). The opposite end of the sonic wave conduit cavity 72 is provided with a pipe base connecting flange 75. The pipe base connection flange 75 is provided. The flange 75 is used to integrally connect and fix the acoustic wave conduit to the temperature measurement tube holder on the water-cooling wall. The entire acoustic wave conduit cavity 72 has a 90° arc-shaped elbow structure, and the acoustic temperature measurement primary element is installed vertically downward. The dust in the acoustic wave tube cavity 72 is not easy to enter the interior of the acoustic temperature measurement primary element due to its own weight.
作为具体的一种实施方式，声波导管腔体72上在圆弧形弯头末端的水平段间隔设置若干个旋流吹扫风道74，优选沿圆周方向切向均匀设置四个旋流吹扫风道74，共4个进风口，旋流吹扫风道74一端倾斜式插入至声波导管腔体72内，旋流吹扫风道74另一端伸出声波导管腔体72，用于连接旋流吹扫空气管路，压缩空气从旋流吹扫风道74沿圆周方向切向进入声波导管腔体72内部，吹扫风经过旋流吹扫风道74形成旋流吹扫风，与常规直吹式吹扫风相比，吹扫扰动大，吹扫风沿着声波导管腔体72内壁旋流向前，可以更好地将声波导管腔体72内壁面灰尘带出。 As a specific implementation method, several swirl blowing air ducts 74 are arranged at intervals in the horizontal section at the end of the arc-shaped elbow on the acoustic wave tube cavity 72 . Preferably, four swirl blowing air ducts are evenly arranged tangentially along the circumferential direction. The sweep air duct 74 has a total of 4 air inlets. One end of the swirl purge air duct 74 is inserted into the sonic wave conduit cavity 72 at an angle, and the other end of the swirl purge air duct 74 extends out of the sonic wave conduit cavity 72. When connected to the swirl purge air pipeline, the compressed air enters the inside of the sonic tube cavity 72 from the swirl purge air duct 74 tangentially along the circumferential direction, and the purge air passes through the swirl purge air duct 74 to form a swirl purge. Compared with the conventional direct blowing blowing wind, the blowing disturbance is greater. The blowing wind swirls forward along the inner wall of the sonic wave conduit cavity 72, which can better bring out the dust on the inner wall of the sonic wave conduit cavity 72. .
声波导管腔体72靠近管座连接法兰75的右端水平段末端外部同心套设一钢管710，该钢管710与声波导管腔体72之间的环状空间即为微风量正压隔绝风道内部腔体77，微风量正压隔绝风道内部腔体77由若干个平行于声波导管腔体72设置的加强筋709分隔为若干个独立区域，加强筋709用于维持微风量正压隔绝风道内部腔体77内部空间，防止变形. A steel pipe 710 is concentrically placed outside the end of the horizontal section of the right end of the acoustic wave tube cavity 72 close to the tube base connecting flange 75. The annular space between the steel pipe 710 and the acoustic wave tube cavity 72 is the micro air volume positive pressure isolation wind. The internal cavity 77 of the duct has a positive breeze pressure and is isolated from the air duct. The internal cavity 77 of the air duct is divided into several independent areas by a plurality of reinforcing ribs 709 arranged parallel to the acoustic wave tube cavity 72. The reinforcing ribs 709 are used to maintain the positive pressure of the breeze. Isolate the internal space of the air duct internal cavity 77 to prevent deformation.
声波导管腔体72和钢管710上倾斜式设置若干个微风量正压隔绝风道入口73，微风量正压隔绝风道内部腔体77末端开设狭缝式微风量正压隔绝风道出风口76，声波导管腔体72内部形成声波导管内部空腔78，微风量正压隔绝风道入口73一端伸出声波导管腔体72和钢管710，微风量正压隔绝风道入口73相对的另一端与微风量正压隔绝风道内部腔体77相连通再经由微风量正压隔绝风道出风口76连通声波导管内部空腔78，压缩空气经过微风量正压隔绝风道入口73进入微风量正压隔绝风道内部腔体77内，再经由微风量正压隔绝风道出风口76进入声波导管内部空腔78内，在声波导管内部形成刚性风幕，射出的环形气流在声波导管内部空腔78靠近法兰接口端面处形成的刚性风幕为圆锥形，出风口风速较高，整体刚性较强，能够保持声波导管头部微正压，防止炉膛内烟气中的灰尘进入声波导管内部。 Several micro-air volume positive pressure isolation air duct entrances 73 are provided at an angle on the sonic wave conduit cavity 72 and the steel pipe 710, and a slit type micro-air volume positive pressure isolation air duct outlet 76 is provided at the end of the internal cavity 77 of the micro-air volume positive pressure isolation air duct. , an internal cavity 78 of the sonic wave duct is formed inside the sonic wave duct cavity 72. One end of the light air volume positive pressure isolation air duct entrance 73 extends out of the sonic wave duct cavity 72 and the steel pipe 710, and the other end of the light air volume positive pressure isolation air duct entrance 73 is opposite. One end is connected to the internal cavity 77 of the breeze positive pressure isolation air duct and then connected to the internal cavity 78 of the sonic wave conduit through the breeze positive pressure isolation air duct outlet 76. The compressed air enters the breeze through the breeze positive pressure isolation air duct inlet 73. The positive pressure isolation air duct internal cavity 77 then enters the sonic wave duct internal cavity 78 through the light air volume positive pressure isolation duct air outlet 76 to form a rigid air curtain inside the sonic wave duct. The rigid air curtain formed near the end face of the flange interface of cavity 78 is conical. The wind speed at the air outlet is high and the overall rigidity is strong. It can maintain a slight positive pressure at the head of the sonic wave conduit and prevent dust in the flue gas in the furnace from entering the inside of the sonic wave conduit. .
微风量正压隔绝风道出风口76与管座连接法兰75接口端面呈向前约20°夹角，将外部烟气向外推动，进一步防止灰尘进入，同时，出风口面积较小，耗气量较少。 The end faces of the interface between the air outlet 76 of the micro-air volume positive pressure isolation air duct and the pipe base connecting flange 75 are at an angle of about 20° forward, pushing the external smoke outward to further prevent dust from entering. At the same time, the area of the air outlet is small and consumes Less air volume.
作为更具体的一种实施方式，微风量正压隔绝风道入口73设置有两个，两个微风量正压隔绝风道入口73分别倾斜式设置于声波导管腔体72两侧，微风量正压隔绝风道入口73与声波导管腔体72之间存在的夹角根据实际需求加以灵活设计。 As a more specific implementation manner, there are two breeze volume positive pressure isolation air duct inlets 73 , and the two breeze volume positive pressure isolation air duct inlets 73 are respectively arranged at an angle on both sides of the acoustic wave tube cavity 72 . The angle between the positive pressure isolation air duct inlet 73 and the acoustic wave conduit cavity 72 can be flexibly designed according to actual needs.
本发明未具体描述的部分或结构采用现有技术或现有产品即可，在此不做赘述。 Parts or structures not specifically described in the present invention may be made using existing technologies or existing products, and will not be described in detail here.
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。The above are only examples of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related technologies fields are equally included in the scope of patent protection of the present invention.
Claims (10)
- 一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，包括： An anti-clogging purge system for coal-fired boiler acoustic temperature measurement equipment, which is characterized by including:自动排水稳压罐，所述自动排水稳压罐包括稳压罐及与其相连通的自动排水阀，所述稳压罐内充满压缩空气，为下游吹扫用气保压； Automatic drainage pressure stabilizing tank. The automatic drainage pressure stabilizing tank includes a pressure stabilizing tank and an automatic drainage valve connected thereto. The pressure stabilizing tank is filled with compressed air to maintain pressure for downstream purge air;吹扫总管路，所述吹扫总管路上游接稳压罐，下游接至各个声学测温元件处，所述稳压罐与吹扫总管路之间设置总管路手动阀，吹扫总管路与各个声学测温元件之间设置有微压吹扫支路和定期吹扫支路，定期吹扫支路的吹扫压力和气量均较微压吹扫支路高； Purge the main pipeline. The upstream of the purge main pipeline is connected to a pressure stabilizing tank, and the downstream is connected to each acoustic temperature measuring element. A main pipeline manual valve is set between the pressure stabilizing tank and the purging main pipeline. The purging main pipeline is connected to There is a micro-pressure purge branch and a regular purge branch between each acoustic temperature measuring element. The purge pressure and air volume of the regular purge branch are higher than those of the micro-pressure purge branch;正常运行时，总管路手动阀打开，稳压罐内的压缩空气经吹扫总管路到达各声学测温元件处，途中分别接至各微压吹扫支路和定期吹扫支路实现吹扫，通过控制微压吹扫支路上的气量保持声学测温元件的声波导管内静压为微正压。During normal operation, the manual valve of the main pipeline is opened, and the compressed air in the pressure stabilizing tank reaches each acoustic temperature measuring element through the main purge pipeline. On the way, it is connected to each micro-pressure purge branch and the regular purge branch to achieve purging. , by controlling the air volume on the micro-pressure purge branch to keep the static pressure in the acoustic wave tube of the acoustic temperature measurement element at a micro-positive pressure.
- 根据权利要求1所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述稳压罐的进气口设置在罐体中下部，其出气口设置在罐体上部，电厂提供的仪用压缩空气经金属管道接至稳压罐，当仪用压缩空气含水时，水分将留在稳压罐中下部并通过自动排水阀排出稳压罐，不会进入下游吹扫管路。An anti-clogging purge system for acoustic temperature measurement equipment of coal-fired boilers according to claim 1, characterized in that the air inlet of the pressure stabilizing tank is arranged in the middle and lower part of the tank body, and the air outlet is arranged in the tank body. In the upper part, the compressed air for instrumentation provided by the power plant is connected to the pressure stabilizing tank through metal pipes. When the compressed air for instrumentation contains water, the moisture will stay in the middle and lower part of the pressure stabilizing tank and be discharged from the pressure stabilizing tank through the automatic drain valve, and will not enter the downstream blower. Sweep the pipes.
- 根据权利要求1所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述微压吹扫支路上安装有调压阀调节支路和手动阀调节支路，所述调压阀调节支路和手动阀调节支路的下游均接至声学测温元件的声波导管处。An anti-blocking purging system for coal-fired boiler acoustic temperature measurement equipment according to claim 1, characterized in that a pressure regulating valve regulating branch and a manual valve regulating branch are installed on the micro-pressure purging branch. The downstream of the pressure regulating valve regulating branch and the manual valve regulating branch are both connected to the acoustic wave conduit of the acoustic temperature measuring element.
- 根据权利要求3所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述调压阀调节支路装有微压吹扫支路调压阀，通过调整微压吹扫支路调压阀和观察压力表数值，将调压阀调节支路气量设定为较小流量，保持声波导管内静压为微正压，防止炉膛内局部微正压时烟气中的灰尘进入声波导管。An anti-clogging purging system for acoustic temperature measurement equipment of coal-fired boilers according to claim 3, characterized in that the pressure regulating valve regulating branch is equipped with a micro-pressure purging branch pressure regulating valve. Pressurize and purge the branch pressure regulating valve and observe the pressure gauge value. Set the pressure regulating valve to adjust the branch gas volume to a smaller flow rate to keep the static pressure in the sonic conduit at slightly positive pressure to prevent flue gas when there is a local slight positive pressure in the furnace. The dust in the sound wave tube enters the sonic tube.
- 根据权利要求3所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述手动阀调节支路装有微压吹扫支路手动阀，用于现场人工吹扫，当出现明确堵塞时加大吹扫气量，及时吹走声波导管内积灰。An anti-clogging purging system for coal-fired boiler acoustic temperature measurement equipment according to claim 3, characterized in that the manual valve adjustment branch is equipped with a micro-pressure purging branch manual valve for manual purging on site. When there is a clear blockage, increase the purge air volume and blow away the dust accumulated in the sonic tube in time.
- 根据权利要求2所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述定期吹扫支路上顺序设置有定期吹扫支路手动阀和定期吹扫支路电磁阀，所述定期吹扫支路电磁阀下游接至声学测温元件的声波导管处，定期吹扫支路中的压缩空气依次经定期吹扫支路手动阀和定期吹扫支路电磁阀后进入声波导管中，通过定期吹扫支路手动阀手动调节定期吹扫支路的出气量。An anti-clogging purging system for coal-fired boiler acoustic temperature measurement equipment according to claim 2, characterized in that a periodic purging branch manual valve and a periodic purging branch are sequentially provided on the periodic purging branch. Solenoid valve, the periodic purging branch solenoid valve is connected downstream to the sonic conduit of the acoustic temperature measuring element, and the compressed air in the periodic purging branch passes through the periodic purging branch manual valve and the periodic purging branch solenoid valve in turn. Then it enters the sonic conduit, and the air outlet volume of the periodic purging branch is manually adjusted through the manual valve of the periodic purging branch.
- 根据权利要求6所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述定期吹扫支路电磁阀通过定期吹扫支路电磁阀线路连接至吹扫控制器。An anti-clogging purging system for coal-fired boiler acoustic temperature measurement equipment according to claim 6, characterized in that the periodic purging branch solenoid valve is connected to the purging control through a periodic purging branch solenoid valve line. device.
- 根据权利要求1、3、4、5或6所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述声波导管上安装有压力传感器，所述压力传感器通过声波导管内压力传感器线路连接至吹扫控制器。An anti-clogging purge system for coal-fired boiler acoustic temperature measurement equipment according to claim 1, 3, 4, 5 or 6, characterized in that a pressure sensor is installed on the acoustic wave conduit, and the pressure sensor passes The pressure sensor line in the sonic tube is connected to the purge controller.
- 根据权利要求1、3、4、5或6所述的一种燃煤锅炉声学测温设备的防堵吹扫系统，其特征在于，所述声波导管包括元件连接法兰、声波导管腔体、微风量正压隔绝风道内部腔体、旋流吹扫风道和管座连接法兰，所述声波导管腔体一端设置元件连接法兰，元件连接法兰用于连接固定声学测温元件，声波导管腔体相对的另一端设置管座连接法兰，声波导管腔体整体呈90°圆弧形弯头结构，声波导管腔体另一端设置微风量正压隔绝风道内部腔体、若干个旋流吹扫风道和若干个微风量正压隔绝风道入口，声波导管腔体内部与旋流吹扫风道相连通，微风量正压隔绝风道入口与微风量正压隔绝风道内部腔体相连通，微风量正压隔绝风道内部腔体上开设微风量正压隔绝风道出风口，微风量正压隔绝风道出风口与设置于声波导管腔体内部的声波导管内部空腔相连通，压缩空气从旋流吹扫风道沿圆周方向切向进入声波导管腔体内部，吹扫风经过旋流吹扫风道形成旋流吹扫风，少量压缩空气经过微风量正压隔绝风道入口进入微风量正压隔绝风道内部腔体内，再经由微风量正压隔绝风道出风口进入声波导管内部空腔内，在声波导管内部头部形成刚性风幕，保持声波导管头部微正压。An anti-clogging purge system for coal-fired boiler acoustic temperature measurement equipment according to claim 1, 3, 4, 5 or 6, characterized in that the acoustic wave conduit includes a component connecting flange and a sound wave conduit cavity. , the internal cavity of the isolated air duct with light air volume and positive pressure, the swirl purge air duct and the pipe base connecting flange. One end of the sonic wave conduit cavity is provided with an element connecting flange, and the element connecting flange is used to connect and fix the acoustic temperature measurement. Component, the opposite end of the sonic wave tube cavity is provided with a pipe socket connection flange. The entire sonic wave guide cavity has a 90° arc-shaped elbow structure. The other end of the sonic wave guide cavity is provided with a breeze volume positive pressure to isolate the inside of the air duct. The cavity, several cyclone purge air ducts and several breeze volume positive pressure isolate the air duct inlet. The inside of the sonic wave tube cavity is connected with the swirl purge air duct, and the breeze volume positive pressure isolates the air duct inlet from the breeze volume. The internal cavity of the positive pressure isolation air duct is connected. The internal cavity of the light air volume positive pressure isolation air duct is provided with an outlet of the light air volume positive pressure isolation air duct. The air outlet of the light air volume positive pressure isolation air duct is arranged in the cavity of the sonic wave conduit. The internal cavities of the internal sonic wave conduit are connected. The compressed air enters the sonic wave conduit cavity tangentially from the swirl purge air duct along the circumferential direction. The purge air passes through the swirl purge air duct to form a swirl purge air. A small amount of The compressed air enters the internal cavity of the micro-volume positive pressure isolation air duct through the inlet of the micro-volume positive pressure isolation air duct, and then enters the internal cavity of the sonic wave tube through the outlet of the micro-volume positive pressure isolation air duct, forming a rigid head inside the sonic wave tube. Air curtain maintains slightly positive pressure at the head of the sonic tube.
- 根据权利要求1-9任一所述的一种燃煤锅炉声学测温设备的防堵吹扫系统的使用方法，其特征在于，包括以下步骤： The method of using the anti-clogging purging system of the coal-fired boiler acoustic temperature measurement equipment according to any one of claims 1-9, characterized in that it includes the following steps:正常运行时，总管路手动阀、定期吹扫支路电磁阀、定期吹扫支路手动阀、微压吹扫支路手动阀、微压吹扫支路调压阀打开，稳压罐内的压缩空气经吹扫总管路到达各声学测温元件处；During normal operation, the main pipeline manual valve, periodic purge branch solenoid valve, periodic purge branch manual valve, micro-pressure purge branch manual valve, and micro-pressure purge branch pressure regulating valve are open, and the pressure in the pressure stabilizing tank The compressed air reaches each acoustic temperature measuring element through the purge main pipeline;需要吹扫时，通过吹扫控制器设置吹扫程序，通过定期吹扫支路手动阀手动调节定期吹扫支路的出气量，调节完毕后日常运行时无需调整，根据声学测温元件的测量顺序，在测量间隔时间内，吹扫控制器按照吹扫程序控制定期吹扫支路电磁阀的通断，实现定期吹扫支路对与其连通的声波导管的吹扫，通过调整微压吹扫支路调压阀和观察压力数值，将调压阀调节支路气量设定为较小流量，保持声波导管内静压为微正压，防止炉膛内局部微正压时烟气中的灰尘进入声波导管，通过微压吹扫支路手动阀进行现场人工吹扫，当出现明确堵塞时加大吹扫气量，及时吹走声波导管内积灰，同时，吹扫控制器接收声波导管内的压力传感器检测的参数，根据吹扫后压力回落的速度，判断测孔内部是否通畅，当某个声学测温元件传压管内压力回落速度变慢时将增加该声学测温元件下次定期吹扫时间，以保持测孔通畅。When purging is required, set the purging program through the purging controller, and manually adjust the air outlet volume of the periodic purging branch through the periodic purging branch manual valve. After the adjustment is completed, no adjustment is needed during daily operation. According to the measurement of the acoustic temperature measuring element sequence, during the measurement interval, the purge controller controls the on and off of the solenoid valve of the regular purge branch according to the purge program, so as to realize the purge of the sonic tube connected to it by the regular purge branch. By adjusting the micro-pressure purge Check the branch pressure regulating valve and observe the pressure value. Set the pressure regulating valve to adjust the branch air volume to a smaller flow rate. Keep the static pressure in the sonic tube at a slightly positive pressure to prevent dust in the flue gas from entering when there is a local slight positive pressure in the furnace. The sonic wave conduit is manually purged on-site through the manual valve of the micro-pressure purge branch. When a clear blockage occurs, the purge air volume is increased to promptly blow away the dust accumulated in the sonic wave conduit. At the same time, the purge controller receives the pressure sensor in the sonic wave conduit. The tested parameters are based on the speed of the pressure drop after purging to determine whether the inside of the measuring hole is unobstructed. When the pressure drop speed in the pressure transmission pipe of an acoustic temperature measuring element slows down, the next regular purge time of the acoustic temperature measuring element will be increased. To keep the measuring hole open.
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| CN202210646591.4A CN115069693B (en) | 2022-06-09 | 2022-06-09 | Anti-blocking purging system of acoustic temperature measuring equipment of coal-fired boiler and use method |
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| CN115815246A (en) * | 2022-12-05 | 2023-03-21 | 核工业理化工程研究院 | Reverse purging method and device for blocking of negative pressure vacuum pipeline |
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