WO2023010634A1 - Quick-response online continuous measurement system for sulfur trioxide and method therefor - Google Patents

Quick-response online continuous measurement system for sulfur trioxide and method therefor Download PDF

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WO2023010634A1
WO2023010634A1 PCT/CN2021/115623 CN2021115623W WO2023010634A1 WO 2023010634 A1 WO2023010634 A1 WO 2023010634A1 CN 2021115623 W CN2021115623 W CN 2021115623W WO 2023010634 A1 WO2023010634 A1 WO 2023010634A1
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sampling
channel
gas
flushing
serpentine
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PCT/CN2021/115623
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French (fr)
Chinese (zh)
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付康丽
赵瀚辰
韩伟
陆续
于在松
姚明宇
王定帮
聂思聪
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西安热工研究院有限公司
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Priority claimed from CN202121825652.0U external-priority patent/CN215985752U/en
Priority claimed from CN202110899359.7A external-priority patent/CN113504228A/en
Application filed by 西安热工研究院有限公司 filed Critical 西安热工研究院有限公司
Publication of WO2023010634A1 publication Critical patent/WO2023010634A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour

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  • the invention relates to on-line measurement of SO3 concentration in flue gas, in particular to an on-line continuous measurement system and method for sulfur trioxide with fast response.
  • SO 3 in the flue gas of coal-fired units can easily cause corrosion of boiler piping equipment, and in recent years, the international coal price has risen, and coal is scarce. SO 3 emitted from chimneys is an important precursor for the formation of PM2.5, which can easily cause atmospheric smog.
  • On-line monitoring of SO 3 in coal-fired flue gas is not only helpful for environmental protection workers to understand the SO 3 concentration emission of coal-fired flue gas, but also plays an important role in adjusting the amount of ammonia injection and the blending ratio of high-sulfur coal in thermal power plants. Guiding significance.
  • the SO 3 online analyzer developed based on the controlled condensation method can accurately measure the SO 3 concentration in the flue gas, but the instrument displays the measurement data intermittently, and cannot display the SO 3 concentration in the flue gas in real time, and there is a time for intermittently displaying the measurement data Disadvantages of longer intervals. Therefore, it is particularly important to shorten the display time interval of the SO 3 online analyzer developed based on the controlled condensation method.
  • the present invention provides a fast-response sulfur trioxide on-line continuous measurement system and its method, with reasonable design, short intermittent display time intervals, effective shortening of the measurement response time of the measurement system, and accurate measurement.
  • the running performance is stable.
  • a fast-response sulfur trioxide online continuous measurement system including a sampling measurement unit, and a control system connected with the sampling measurement unit;
  • the sampling measurement unit includes a multi-channel sampling gun, a flue gas collection device and a flushing device connected to each channel of the multi-channel sampling gun in one-to-one correspondence, and a shared sulfate ion measuring device;
  • the flue gas collection device comprises a serpentine condenser tube connected to the outlets of each channel of the multi-channel sampling gun, a gas-liquid separator connected in turn at the outlet of each serpentine condenser tube through the first outlet of the three-way solenoid valve, Gas flow meter and gas pump;
  • the flushing device includes a flushing liquid storage tank correspondingly connected to the inlet of each serpentine condenser through independent flushing pipelines;
  • Described sulfate ion measuring device comprises the collection liquid storage tank that is connected with the second outlet of three-way electromagnetic valve, and the reaction bed and the photoelectric signal detection system that are connected with the collection liquid storage tank outlet; The input end of described reaction bed A standard liquid storage tank is also connected.
  • sampling gun adopts a multi-channel sampling gun with at least two channels, or multiple single sampling guns in parallel.
  • the contact surfaces between the sampling gun and the flue gas are all provided with a sulfuric acid passivation layer or made of inert materials.
  • the serpentine condensing pipe is also connected with a constant temperature system; the constant temperature system adopts a water bath, an oil bath or other heat preservation and heating systems.
  • the photoelectric signal detection system is equipped with a temperature control device; the gas-liquid separator, reaction bed and gas flow meter are all equipped with a refrigeration system for cooling.
  • reaction bed adopts any system that performs color reaction with sulfate ions.
  • the flushing system also includes a delivery pump, and the delivery pump adopts any one of a multi-channel peristaltic pump, a plurality of single-channel peristaltic pumps, or a plurality of pulse pumps; the delivery pumps are respectively connected to collect The waste liquid outlet of the liquid storage tank, the outlet of the standard liquid storage tank and the waste liquid outlet of the photoelectric signal detection system are used to transport the corresponding medium.
  • the second outlet pipeline of the three-way solenoid valve, the waste liquid outlet pipeline of the gas-liquid separator and each flushing liquid pipeline are respectively provided with a pulse pump or a single peristaltic pump;
  • the multiple three-way The second outlet pipeline of the electromagnetic valve and/or the pulse pumps respectively arranged on the plurality of flushing liquid pipelines are multi-channel peristaltic pumps, and the number of channels of the multi-channel peristaltic pump is the same as the number of outlets of the serpentine condenser pipe and/or flushing pipelines respectively. corresponding to the quantity.
  • a fast-response online continuous measurement method for sulfur trioxide, using a dual-channel sampling gun comprising:
  • reaction bed and photoelectric signal detection system use the standard liquid in the standard liquid storage tank to calibrate the test system
  • the collection liquid After the sampling of the first serpentine condensing pipe channel is finished, inject flushing liquid into the first serpentine condensing pipe to flush the inner wall of the first serpentine condensing pipe, and open the liquid channel connected to the second outlet of the first solenoid valve, and the flushing liquid Collected in the collection liquid storage tank; the collection liquid enters the reaction bed and the photoelectric signal detection system successively for the sulfate ion concentration test, and outputs to the control system;
  • Sampling is carried out after the first serpentine condensing tube channel has finished collecting the flushing liquid; at the same time, after the second serpentine condensing pipe gas path has completed sampling, the flushing liquid is collected;
  • the first serpentine condenser and the second serpentine condenser are provided with a constant temperature system, and the temperature control range is 60-95°C;
  • the photoelectric signal detection system is provided with a temperature control device, and the control temperature is kept at room temperature + 3°C;
  • the gas-liquid separator, reaction bed and gas flow meter are all provided with a cooling system for cooling.
  • the present invention has the following beneficial technical effects:
  • the system of the present invention adopts a multi-channel sampling gun and a serpentine condensation pipe, a flushing pipeline and a flue gas collection system that are connected to each channel of the sampling gun in one-to-one correspondence and are independent of each other, so that each sampling channel is equipped with a separate flushing Pipelines, gas-liquid separators, gas flowmeters and gas pumps can more conveniently and quickly perform multi-channel sampling and flushing sequentially, which not only effectively shortens the interval of intermittent display, but also shortens the measurement response time of the measurement system. It has important guiding significance for power plants and industrial boilers to prevent air preheater clogging and pipe corrosion, and to guide coal-fired power plants to adjust the amount of ammonia injection and the proportion of high -sulfur coal blended combustion.
  • the system of the present invention adopts a multi-channel sampling gun with at least two channels, or a plurality of single sampling guns in parallel as the sampling gun, which is convenient and reliable in various forms.
  • the system of the present invention carries out passivation treatment on the contact surface between the sampling gun and the flue gas, thereby forming an oxide film on its surface, avoiding the occurrence of reaction with SO3 or sulfuric acid vapor in the flue gas, and effectively ensuring the extraction sampling temperature .
  • system of the present invention can effectively control the temperature of the serpentine condensing pipe by setting a constant temperature system of a water bath or an oil bath on the serpentine condensing pipe to ensure the effect of flue gas condensation.
  • the system of the present invention uses a refrigeration system to control the temperature of the gas-liquid separator, gas flow meter, and reaction bed, and uses the temperature control device of the photoelectric signal detection system to control the temperature, which can effectively improve the collection and measurement efficiency of the system and ensure that the measurement results Accurate and reliable.
  • the system of the present invention can effectively transmit the collected gas by setting a delivery pump in the system, thereby improving the efficiency of the whole system; meanwhile, by setting a pulse pump, the measurement rate of the whole system is further improved.
  • FIG. 1 is a schematic structural diagram of the system described in Embodiment 1 of the present invention.
  • Fig. 2 is a schematic structural diagram of the system described in Embodiment 3 of the present invention.
  • sampling gun 1 pulse pump 2, first pulse pump 2A, second pulse pump 2B, flushing liquid storage tank 3, serpentine condenser 4, first serpentine condenser 4A, second serpentine condenser 4B , collection liquid storage tank 5, standard liquid storage tank 6, delivery pump 7, reaction bed 8, three-way solenoid valve 9, first three-way solenoid valve 9A, second three-way solenoid valve 9B, photoelectric signal detection system 10, gas Liquid separator 11 , gas flow meter 12 , air pump 13 , first air pump 13A, second air pump 13B, constant temperature system 14 , control system 15 , flow totalizer 16 , first constant temperature system 17 .
  • a fast-response sulfur trioxide on-line continuous measurement system of the present invention includes a sampling measurement unit and a control system 15;
  • the sampling measurement unit includes a multi-channel sampling gun 1 composed of a serpentine condenser 4 and a gas-liquid separator 11 , the flue gas collecting device that gas flowmeter 12 and air pump 13 are formed, the flushing device that is made up of flushing liquid storage tank 3, is made up of collection liquid storage tank 5, standard liquid storage tank 6, reaction bed 8, photoelectric signal detection system 10 Sulphate ion measuring device;
  • the sampling and measuring unit also includes a three-way solenoid valve 9, a constant temperature system 14, a pulse pump 2, and a delivery pump 7;
  • Each channel of the multi-channel sampling gun 1 is connected to the inlet of each serpentine condensing pipe 4 through an independent flushing pipeline, and each independent flushing pipeline is respectively provided with a pulse pump 2 and connected to a common flushing liquid storage tank 3;
  • Each serpentine condensing pipe 4 is connected to the constant temperature system 14, and the outlet of each serpentine condensing pipe 4 is provided with a three-way solenoid valve 9 respectively; the first outlet of each three-way solenoid valve is respectively connected to an independent gas-liquid separator 11, Gas flow meter 12 and air pump 13, the second outlet is provided with pulse pump 2 and connected to common collection liquid storage tank 5;
  • the outlet of described collection liquid storage tank 5 is connected to reaction bed 8 and photoelectric signal detection system 10, and the waste liquid outlet is connected to A delivery pump 7;
  • the input end of the reaction bed 8 is also connected to a standard liquid storage tank 6, and the outlet of the standard liquid storage tank 6 is connected to the delivery pump 7;
  • the waste liquid outlet of the photoelectric signal detection system 10 is connected to the
  • the sampling gun 1 can be a plurality of channel sampling guns with a channel number greater than 1, or a plurality of single sampling guns, and the use of multiple sampling guns can further shorten the system measurement response time;
  • the contact surfaces of the sampling gun 1 and the flue gas are all passivated by sulfuric acid or made of inert materials to ensure that the contact surface of the sampling gun 1 does not react with SO or sulfuric acid vapor in the flue gas, and the heating
  • the temperature is controllable at 200-350°C to ensure that the extraction sampling temperature is not lower than 220°C.
  • the specification of the serpentine condensing tube 4 is related to the sampling rate, and the specification should be such that the complete capture of SO 3 /H 2 SO 4 vapor can be achieved when a certain sampling rate is adopted.
  • the constant temperature system 14 can be a water bath, an oil bath, and any kind of thermal insulation heating system that can ensure that the serpentine condenser tube 4 is kept at a constant temperature, so that the temperature range of the serpentine condenser tube 4 is 60-95°C .
  • the photoelectric signal testing system 10 is provided with a temperature control device whose temperature is constant at room temperature + 3°C.
  • the gas-liquid separator 11, the reaction bed 8, and the gas flow meter 12 are all provided with a refrigeration system for cooling, and the refrigeration system can be any one of a water chiller, a compression refrigerator, a Peltier refrigerator, etc.
  • the refrigeration system that can cool down the system ensures the temperature in the low temperature zone.
  • the reaction bed 8 may be any system capable of color reaction with sulfate ions.
  • the delivery pump 7 may be a multi-channel peristaltic pump, or a plurality of single-channel peristaltic pumps, or a plurality of pulse pumps.
  • the pulse pump 2 can be replaced by a single peristaltic pump or a multi-channel peristaltic pump.
  • control system 15 can be any kind of programmable software or components.
  • the sampling gun 1 provided with two channels as an example, as shown in Figure 1, the two channels of the sampling gun 1 are respectively connected to the first serpentine condenser 4A and the second serpentine condenser 4B;
  • a first three-way solenoid valve 9A and a second three-way solenoid valve 9B are provided at the outlets of the serpentine condensing pipe 4A and the second serpentine condensing pipe 4B respectively, and the first pulse pump 2A and second pulse pump 2B;
  • the test system After the test system is calibrated, enter the test mode, open the gas channel of the first serpentine condenser 4A for sampling, and the gas channel of the second serpentine condenser 4B is closed. After half the time of sampling, open the second serpentine condensing tube 4B gas path sampling channel for sampling (at this time, the liquid channel of the second serpentine condensing tube 4B is in a closed state), and wait for the first serpentine condensing tube 4A After the channel sampling is finished, turn off the first air pump 13A, start the first pulse pump 2A to inject flushing liquid into the first serpentine condenser pipe 4A to flush the inner wall of the first serpentine condenser pipe 4A, and open the liquid path of the first three-way solenoid valve 9A The flushing liquid is collected in the collection liquid storage tank 5, and the collection liquid enters the reaction bed 8 and the photoelectric signal detection system 10 successively under the power of the delivery pump 7 to test the sulfate ion concentration, and finally passes the calculation prepared in
  • the present invention also provides a fast-response online continuous measurement method for sulfur trioxide, using a dual-channel sampling gun, the method comprising:
  • Reaction bed 8 and photoelectric signal detection system 10 utilize the standard liquid in the standard liquid storage tank 6 to carry out test system calibration;
  • test system After the test system is calibrated, enter the test mode, open the first serpentine condenser 4A gas path for sampling, and the second serpentine condenser 4B gas path sampling channel is closed; wait for the first serpentine condenser 4A to sample When half of the time is reached, the second serpentine condenser 4B gas path sampling channel is opened for sampling;
  • the flushing liquid is collected in the collected liquid storage tank 5; the collected liquid enters the reaction bed 8 and the photoelectric signal detection system 10 successively for sulfate ion concentration testing, and is output to the control system 15;
  • the first serpentine condenser pipe 4A and the second serpentine condenser pipe 4B are provided with a constant temperature system 14, and the temperature control range is 60-95°C;
  • the photoelectric signal detection system 10 is provided with a temperature control device, and the control temperature is constant at room temperature + 3°C;
  • the gas-liquid separator 11, the reaction bed 8 and the gas flow meter 12 are all provided with a cooling system for cooling.
  • the measurement system of the present invention is used to implement on the system as shown in Fig. 1, and the test is carried out by using SO 3 /H 2 SO 4 steam simulated flue gas containing 25 mg/m 3 :
  • the measurement system of the present invention is used to implement on the system as shown in Fig. 1, and the test is carried out by using SO 3 /H 2 SO 4 steam simulated flue gas containing 25 mg/m 3 :
  • the utility model is an on-line continuous measurement system for sulfur trioxide, which comprises a sampling gun 1, a serpentine condenser pipe 4, a flushing liquid storage tank 3, a collection liquid storage tank 5, a standard liquid storage tank 6, a reaction bed 8, a three-way electromagnetic Sampling measurement consisting of valve 9, gas-liquid separator 11, flow totalizer 16, first constant temperature system 17, constant temperature system 14, pulse pump 2, photoelectric signal detection system 10, delivery pump 7, air pump 13 and gas flow meter 12 unit, and control system 15;
  • the sampling gun 1 is provided with a plurality of independent channels, and each channel is connected with an independent serpentine condenser 4 and a flushing liquid pipeline;
  • Each of the flushing liquid pipelines is provided with a pulse pump 2 and communicated with the flushing liquid storage tank 3;
  • the serpentine condensing pipe 4 is connected with a constant temperature system 14, and the outlet of the serpentine condensing pipe 4 is provided with a three-way solenoid valve 9;
  • the first outlet of the three-way electromagnetic valve 9 is sequentially connected to the gas-liquid separator 11, the gas flow meter 12, the flow totalizer 16 and the air pump 13 through the collection pipeline, and the second outlet is sequentially connected to the pulse pump 2, the collection liquid storage Tank 5, reaction bed 8 and photoelectric signal detection system 10;
  • a transfer pump 7 is arranged between the collected liquid storage tank 5 and the reaction bed 8;
  • the outlet of the standard liquid storage tank 6 is sequentially connected to the delivery pump 7, the reaction bed 8 and the photoelectric signal detection system 10;
  • the outlet pipeline of the gas-liquid separator 11 is provided with a pulse pump 2; the gas-liquid separator 11, the reaction bed 8, the gas flowmeter 12 and the photoelectric signal detection system 10 are placed in the first constant temperature system 17;
  • the sampling gun 1 is made of inert material or the contact surface with the flue gas is passivated by sulfuric acid to ensure that the contact surface of the sampling gun 1 does not react with the SO 3 /H 2 SO 4 vapor, and the heating
  • the temperature range is 200-350°C, ensure that the extraction sampling temperature is not lower than 220°C.
  • the specification of the serpentine condensing tube 4 is related to the sampling rate, and the specification should be such that the complete capture of SO 3 /H 2 SO 4 vapor can be achieved when a certain sampling rate is adopted.
  • the constant temperature system 14 can be a water bath or an oil bath with a temperature of 60-95° C. or any other heat preservation and heating system that can ensure that the serpentine condensing tube 4 is at a constant temperature, so that the serpentine condensing tube 4 is located
  • the temperature range is 60-95°C.
  • the first constant temperature system 17 is set in a temperature zone of 0-5°C and ambient temperature +3°C, the gas-liquid separator 11, the reaction bed 8, and the gas flow meter 12 are placed in the 0-5°C zone, and the photoelectric signal The detection system 10 is placed in the ambient temperature +3°C temperature zone.
  • the reaction bed 8 may be any system capable of color reaction with sulfate ions.
  • the delivery pump 7 may be a multi-channel peristaltic pump, or a plurality of single-channel peristaltic pumps, or a plurality of pulse pumps.
  • the pulse pump 2 can be replaced by a single peristaltic pump or a multi-channel peristaltic pump.
  • sampling gun 1 system provided with two channels is taken as an example.
  • a first three-way solenoid valve 9A and a second three-way solenoid valve 9B are provided at the outlets of the serpentine condensing pipe 4A and the second serpentine condensing pipe 4B respectively, and the first pulse pump 2A and second pulse pump 2B;
  • the first serpentine condenser pipe 4A injects the flushing liquid in the flushing liquid storage tank 3 to flush the inner wall of the first serpentine condenser pipe 4A to collect sulfuric acid droplets, and at the same time, the channel of the second serpentine condenser pipe 4B starts sampling, and after the sampling, close
  • the gas passage of the second serpentine condenser 4B that is, the second three-way solenoid valve 9B is controlled to open the liquid passage of the second serpentine condenser 4B
  • the second pulse pump 2B is started, and the passage to the second serpentine condenser 4B Injecting the flushing liquid, opening the air channel of the first serpentine condenser tube 4A for sampling, switching the sampling and flushing sequentially in this way can shorten the sampling reading interval and shorten the
  • the measuring system described in the utility model is used to implement on the system as shown in Fig. 2, and the SO 3 /H 2 SO 4 steam simulated flue gas containing 25mg/ m3 is used for the test:
  • the measurement system described in the utility model is used to implement on the system as shown in Figure 2, and the SO 3 /H 2 SO 4 steam simulated flue gas containing 50mg/ m3 is used for the test:

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Abstract

A quick-response online continuous measurement system for sulfur trioxide and a method therefor, the system comprising a sampling measurement unit and a control system (15) that is connected to the sampling measurement unit; the sampling measurement unit comprises a multi-channel sampling gun (1), a flue gas collecting device and a flushing device which are separately connected in one-to-one correspondence to channels of the multi-channel sampling gun (1), and a shared sulfate ion measuring device; the flue gas collecting device comprises Graham condensers (4) connected to outlets of the channels of the multi-channel sampling gun (1), and gas-liquid separators (11), gas flow meters (12) and gas pumps (13) which are sequentially connected to an outlet of each Graham condenser (4) by means of first outlets of three-way solenoid valves (9); the flushing device comprises a flushing liquid storage tank (3) which is correspondingly connected to inlets of the Graham condensers (4) by means of independent flushing pipes; the sulfate ion measuring device comprises a collected liquid storage tank (5) which is connected by means of a second outlet of the three-way solenoid valves (9), and a reaction bed (8) and a photoelectric signal detection system (10) which are connected to an outlet of the collected liquid storage tank (5); and an input end of the reaction bed (8) is also connected to a standard liquid storage tank (6).

Description

一种响应快速的三氧化硫在线连续测量***及其方法A fast-response sulfur trioxide online continuous measurement system and method thereof 技术领域technical field
本发明涉及烟气中SO 3浓度的在线测量，具体为一种响应快速的三氧化硫在线连续测量***及其方法。 The invention relates to on-line measurement of SO3 concentration in flue gas, in particular to an on-line continuous measurement system and method for sulfur trioxide with fast response.
背景技术Background technique
燃煤机组烟气中的SO 3易引发锅炉管道设备腐蚀，且近年来国际煤炭价格攀升，电煤匮乏，许多电厂掺烧高硫煤发电，易引发更严重的锅炉管道设备腐蚀问题；此外，烟囱排放的SO 3是形成PM2.5的重要前驱体，易引发大气雾霾。对燃煤烟气中的SO 3进行在线监测不仅有助于环保工作者了解燃煤烟气的SO 3浓度排放情况，而且对火电厂调整喷氨量、高硫煤掺烧配比具有重要的指导意义。 SO 3 in the flue gas of coal-fired units can easily cause corrosion of boiler piping equipment, and in recent years, the international coal price has risen, and coal is scarce. SO 3 emitted from chimneys is an important precursor for the formation of PM2.5, which can easily cause atmospheric smog. On-line monitoring of SO 3 in coal-fired flue gas is not only helpful for environmental protection workers to understand the SO 3 concentration emission of coal-fired flue gas, but also plays an important role in adjusting the amount of ammonia injection and the blending ratio of high-sulfur coal in thermal power plants. Guiding significance.
因此，急需对燃煤烟气中SO 3浓度进行在线监测研究，开发出测试准确、响应灵敏的测试***。SO 3浓度的测量难点在于SO 3的采样，异丙醇吸收法和控制冷凝法为行业内使用最多的两种采样方法。行业内已有分别基于异丙醇吸收法和控制冷凝法采样原理的SO 3在线分析仪，基于异丙醇吸收法开发的SO 3在线分析仪能实时显示测量数据，但该设备未在行业内推广，少量科研机构购置该仪器，并在进行了一些测量准确性的研究，研究发现该测试仪测量的准确性为60～80％，无法反应烟气中真实的SO 3浓度情况。基于控制冷凝法开发的SO 3在线分析仪能准确测量烟气中的SO 3浓度，但该仪器是间歇显示测量数据，无法做到实时显示烟气中的SO 3浓度，存在间歇显示测量数据时间间隔较长的弊端。因此，缩短基于控制冷凝法开发的SO 3在线分析仪的显数时间间隔显得尤为重要。 Therefore, it is urgent to conduct online monitoring research on SO 3 concentration in coal-fired flue gas, and develop a testing system with accurate testing and sensitive response. The difficulty of measuring SO 3 concentration lies in the sampling of SO 3 , isopropanol absorption method and controlled condensation method are the two most used sampling methods in the industry. There are already SO 3 online analyzers based on the sampling principles of isopropanol absorption method and controlled condensation method in the industry. The SO 3 online analyzer developed based on isopropanol absorption method can display measurement data in real time, but this equipment is not in the industry. Promotion, a small number of scientific research institutions purchased the instrument, and conducted some research on the measurement accuracy. The research found that the measurement accuracy of the tester was 60-80%, which could not reflect the real SO 3 concentration in the flue gas. The SO 3 online analyzer developed based on the controlled condensation method can accurately measure the SO 3 concentration in the flue gas, but the instrument displays the measurement data intermittently, and cannot display the SO 3 concentration in the flue gas in real time, and there is a time for intermittently displaying the measurement data Disadvantages of longer intervals. Therefore, it is particularly important to shorten the display time interval of the SO 3 online analyzer developed based on the controlled condensation method.
发明内容Contents of the invention
针对现有技术中存在的问题，本发明提供一种响应快速的三氧化硫在线连续测量***及其方法，设计合理，间歇显数时间间隔短，有效缩短测量系 统的测量响应时间，测量准确，运行性能稳定。Aiming at the problems existing in the prior art, the present invention provides a fast-response sulfur trioxide on-line continuous measurement system and its method, with reasonable design, short intermittent display time intervals, effective shortening of the measurement response time of the measurement system, and accurate measurement. The running performance is stable.
本发明是通过以下技术方案来实现：The present invention is realized through the following technical solutions:
一种响应快速的三氧化硫在线连续测量***，包括采样测量单元，以及与采样测量单元连接的控制***；A fast-response sulfur trioxide online continuous measurement system, including a sampling measurement unit, and a control system connected with the sampling measurement unit;
所述的采样测量单元包括多通道的采样枪，分别与多通道的采样枪各通道一一对应连接的烟气采集装置和冲洗装置，以及共用的硫酸根离子测量装置；The sampling measurement unit includes a multi-channel sampling gun, a flue gas collection device and a flushing device connected to each channel of the multi-channel sampling gun in one-to-one correspondence, and a shared sulfate ion measuring device;
所述的烟气采集装置包括连接在多通道采样枪各个通道出口处的蛇形冷凝管，通过三通电磁阀的第一出口依次连接在每个蛇形冷凝管出口处的气液分离器、气体流量计和气泵；The flue gas collection device comprises a serpentine condenser tube connected to the outlets of each channel of the multi-channel sampling gun, a gas-liquid separator connected in turn at the outlet of each serpentine condenser tube through the first outlet of the three-way solenoid valve, Gas flow meter and gas pump;
所述的冲洗装置包括分别通过独立冲洗管路与各蛇形冷凝管入口处对应连接的冲洗液储罐；The flushing device includes a flushing liquid storage tank correspondingly connected to the inlet of each serpentine condenser through independent flushing pipelines;
所述的硫酸根离子测量装置包括通过三通电磁阀的第二出口连接设置的收集液储罐，以及与收集液储罐出口连接的反应床和光电信号检测***；所述反应床的输入端还连接有标液储罐。Described sulfate ion measuring device comprises the collection liquid storage tank that is connected with the second outlet of three-way electromagnetic valve, and the reaction bed and the photoelectric signal detection system that are connected with the collection liquid storage tank outlet; The input end of described reaction bed A standard liquid storage tank is also connected.
进一步的，所述的采样枪采用至少设置两个通道的多通道采样枪，或者并行的多个单根采样枪。Further, the sampling gun adopts a multi-channel sampling gun with at least two channels, or multiple single sampling guns in parallel.
进一步的，所述的采样枪与烟气的接触面均设置有硫酸钝化层或采用惰性材质制成。Further, the contact surfaces between the sampling gun and the flue gas are all provided with a sulfuric acid passivation layer or made of inert materials.
进一步的，所述的蛇形冷凝管还连接设置有恒温***；所述的恒温***采用水浴、油浴或其他保温加热***。Further, the serpentine condensing pipe is also connected with a constant temperature system; the constant temperature system adopts a water bath, an oil bath or other heat preservation and heating systems.
进一步的，所述的光电信号检测***设置控温装置；所述的气液分离器、反应床和气体流量计均设置有用于降温的制冷***。Further, the photoelectric signal detection system is equipped with a temperature control device; the gas-liquid separator, reaction bed and gas flow meter are all equipped with a refrigeration system for cooling.
进一步的，所述的反应床采用任意一种与硫酸根离子进行显色反应的***。Further, the reaction bed adopts any system that performs color reaction with sulfate ions.
进一步的，所述的冲洗***还包括输送泵，所述的输送泵采用多通道蠕动泵，多个单通道蠕动泵，或者多个脉冲泵中的任意一种；所述的输送泵分别连接收集液储罐的废液出口、标液储罐的出口和光电信号检测***的废液出口，用于输送对应介质。Further, the flushing system also includes a delivery pump, and the delivery pump adopts any one of a multi-channel peristaltic pump, a plurality of single-channel peristaltic pumps, or a plurality of pulse pumps; the delivery pumps are respectively connected to collect The waste liquid outlet of the liquid storage tank, the outlet of the standard liquid storage tank and the waste liquid outlet of the photoelectric signal detection system are used to transport the corresponding medium.
进一步的，所述的三通电磁阀的第二出口管路、气液分离器的废液出口管路和各个冲洗液管路上分别设置有脉冲泵或单个蠕动泵；所述的多个三通电磁阀的第二出口管路和/或多个冲洗液管路上分别设置的脉冲泵为多通道蠕动泵，多通道蠕动泵的通道数量分别与蛇形冷凝管的出口数量和/或冲洗管路的数量对应。Further, the second outlet pipeline of the three-way solenoid valve, the waste liquid outlet pipeline of the gas-liquid separator and each flushing liquid pipeline are respectively provided with a pulse pump or a single peristaltic pump; the multiple three-way The second outlet pipeline of the electromagnetic valve and/or the pulse pumps respectively arranged on the plurality of flushing liquid pipelines are multi-channel peristaltic pumps, and the number of channels of the multi-channel peristaltic pump is the same as the number of outlets of the serpentine condenser pipe and/or flushing pipelines respectively. corresponding to the quantity.
一种响应快速的三氧化硫在线连续测量方法，采用双通道的采样枪，所述方法包括，A fast-response online continuous measurement method for sulfur trioxide, using a dual-channel sampling gun, said method comprising:
反应床和光电信号检测***利用标液储罐中的标液进行测试***标定；The reaction bed and photoelectric signal detection system use the standard liquid in the standard liquid storage tank to calibrate the test system;
待测试***标定完后，进入测试模式，开启第一蛇形冷凝管气路通道进行采样，第二蛇形冷凝管气路采样通道处于关闭状态；待第一蛇形冷凝管采样进行到一半时间时，开启第二蛇形冷凝管气路采样通道进行采样；After the test system is calibrated, enter the test mode, open the first serpentine condenser air channel for sampling, and the second serpentine condenser air sampling channel is closed; wait for half of the first serpentine condenser sampling When , open the second serpentine condenser gas path sampling channel for sampling;
待第一蛇形冷凝管通道采样结束后，向第一蛇形冷凝管注入冲洗液冲洗第一蛇形冷凝管内壁，并打开与第一电磁阀第二出口连接的液路通道，将冲洗液收集在收集液储罐中；收集液先后进入反应床和光电信号检测***进行硫酸根离子浓度测试，并输出至控制***；After the sampling of the first serpentine condensing pipe channel is finished, inject flushing liquid into the first serpentine condensing pipe to flush the inner wall of the first serpentine condensing pipe, and open the liquid channel connected to the second outlet of the first solenoid valve, and the flushing liquid Collected in the collection liquid storage tank; the collection liquid enters the reaction bed and the photoelectric signal detection system successively for the sulfate ion concentration test, and outputs to the control system;
第一蛇形冷凝管通道的完成冲洗液收集后，进行采样；同时第二蛇形冷凝管气路完成采样后，进行冲洗液收集；Sampling is carried out after the first serpentine condensing tube channel has finished collecting the flushing liquid; at the same time, after the second serpentine condensing pipe gas path has completed sampling, the flushing liquid is collected;
重复上述步骤，交替进行第一蛇形冷凝管和第二蛇形冷凝管的采样和冲洗，实现三氧化硫在线连续测量。The above steps are repeated, and the sampling and flushing of the first serpentine condensing tube and the second serpentine condensing tube are alternately performed to realize online continuous measurement of sulfur trioxide.
进一步的，further,
所述的第一蛇形冷凝管和第二蛇形冷凝管上设置有恒温***，温度控制 范围为60-95℃；The first serpentine condenser and the second serpentine condenser are provided with a constant temperature system, and the temperature control range is 60-95°C;
所述的光电信号检测***设置有控温装置，控制温度恒定为室温+3℃；The photoelectric signal detection system is provided with a temperature control device, and the control temperature is kept at room temperature + 3°C;
所述的气液分离器、反应床和气体流量计均设置有用于降温的制冷***。The gas-liquid separator, reaction bed and gas flow meter are all provided with a cooling system for cooling.
与现有技术相比，本发明具有以下有益的技术效果：Compared with the prior art, the present invention has the following beneficial technical effects:
本发明***通过采用多通道的采样枪和与采样枪的各通道一一对应连接且相互独立的蛇形冷凝管、冲洗管路以及烟气采集***，使得每个采样通道都配置有单独的冲洗管路、气液分离器、气体流量计和气泵，能更加方便快捷的进行多通道依次切换采样冲洗，不但有效缩短了间歇显数时间间隔，更加缩短了测量***的测量响应时间，为燃煤电厂及工业锅炉防治空预器堵塞和管道腐蚀、指导燃煤电厂调整喷氨量及高硫煤掺烧比例具有重要的指导意义，而且能在线监测净烟气的SO 3浓度排放情况。 The system of the present invention adopts a multi-channel sampling gun and a serpentine condensation pipe, a flushing pipeline and a flue gas collection system that are connected to each channel of the sampling gun in one-to-one correspondence and are independent of each other, so that each sampling channel is equipped with a separate flushing Pipelines, gas-liquid separators, gas flowmeters and gas pumps can more conveniently and quickly perform multi-channel sampling and flushing sequentially, which not only effectively shortens the interval of intermittent display, but also shortens the measurement response time of the measurement system. It has important guiding significance for power plants and industrial boilers to prevent air preheater clogging and pipe corrosion, and to guide coal-fired power plants to adjust the amount of ammonia injection and the proportion of high -sulfur coal blended combustion.
进一步，本发明***通过采用通道数量至少两个的多通道采样枪，或者并行的多个单根采样枪作为采样枪，形式多样，方便可靠。Furthermore, the system of the present invention adopts a multi-channel sampling gun with at least two channels, or a plurality of single sampling guns in parallel as the sampling gun, which is convenient and reliable in various forms.
进一步，本发明***将采样枪与烟气的接触面进行钝化处理，从而在其表面形成氧化膜，避免与烟气中的SO 3或硫酸蒸汽反应现象的发生，能有效确保抽气采样温度。 Further, the system of the present invention carries out passivation treatment on the contact surface between the sampling gun and the flue gas, thereby forming an oxide film on its surface, avoiding the occurrence of reaction with SO3 or sulfuric acid vapor in the flue gas, and effectively ensuring the extraction sampling temperature .
进一步，本发明***通过在蛇形冷凝管上设置水浴或油浴的恒温***，能有效控制蛇形冷凝管所处温度，保证烟气冷凝效果。Further, the system of the present invention can effectively control the temperature of the serpentine condensing pipe by setting a constant temperature system of a water bath or an oil bath on the serpentine condensing pipe to ensure the effect of flue gas condensation.
进一步，本发明***采用制冷***对气液分离器、气体流量计、反应床进行控温，以及采用光电信号检测***的控温装置进行控温，能有效提高***采集和测量效率，确保测量结果精准可靠。Further, the system of the present invention uses a refrigeration system to control the temperature of the gas-liquid separator, gas flow meter, and reaction bed, and uses the temperature control device of the photoelectric signal detection system to control the temperature, which can effectively improve the collection and measurement efficiency of the system and ensure that the measurement results Accurate and reliable.
进一步，本发明***通过在***中设置输送泵，能有效传输收集的气体，从而提高整个***的效率；同时通过设置脉冲泵，进一步提高了整个***的测量速率。Further, the system of the present invention can effectively transmit the collected gas by setting a delivery pump in the system, thereby improving the efficiency of the whole system; meanwhile, by setting a pulse pump, the measurement rate of the whole system is further improved.
附图说明Description of drawings
图1为本发明实施例1中所述***的结构示意图。FIG. 1 is a schematic structural diagram of the system described in Embodiment 1 of the present invention.
图2为本发明实施例3中所述***的结构示意图。Fig. 2 is a schematic structural diagram of the system described in Embodiment 3 of the present invention.
图中：采样枪1、脉冲泵2、第一脉冲泵2A、第二脉冲泵2B、冲洗液储罐3、蛇形冷凝管4、第一蛇形冷凝管4A、第二蛇形冷凝管4B、收集液储罐5、标液储罐6、输送泵7、反应床8、三通电磁阀9、第一三通电磁阀9A、第二三通电磁阀9B、光电信号检测***10、气液分离器11、气体流量计12、气泵13、第一气泵13A、第二气泵13B、恒温***14、控制***15、流量积算仪16、第一恒温***17。In the figure: sampling gun 1, pulse pump 2, first pulse pump 2A, second pulse pump 2B, flushing liquid storage tank 3, serpentine condenser 4, first serpentine condenser 4A, second serpentine condenser 4B , collection liquid storage tank 5, standard liquid storage tank 6, delivery pump 7, reaction bed 8, three-way solenoid valve 9, first three-way solenoid valve 9A, second three-way solenoid valve 9B, photoelectric signal detection system 10, gas Liquid separator 11 , gas flow meter 12 , air pump 13 , first air pump 13A, second air pump 13B, constant temperature system 14 , control system 15 , flow totalizer 16 , first constant temperature system 17 .
具体实施方式Detailed ways
下面结合具体的实施例对本发明做进一步的详细说明，所述是对本发明的解释而不是限定。The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
实施例1Example 1
本发明一种响应快速的三氧化硫在线连续测量***，包括采样测量单元和控制***15；所述的采样测量单元包括多通道的采样枪1，由蛇形冷凝管4、气液分离器11、气体流量计12和气泵13组成的烟气采集装置，由冲洗液储罐3组成的冲洗装置，由收集液储罐5、标液储罐6、反应床8、光电信号检测***10组成的硫酸根离子测量装置；采样测量单元还包括三通电磁阀9、恒温***14、脉冲泵2、输送泵7；A fast-response sulfur trioxide on-line continuous measurement system of the present invention includes a sampling measurement unit and a control system 15; the sampling measurement unit includes a multi-channel sampling gun 1 composed of a serpentine condenser 4 and a gas-liquid separator 11 , the flue gas collecting device that gas flowmeter 12 and air pump 13 are formed, the flushing device that is made up of flushing liquid storage tank 3, is made up of collection liquid storage tank 5, standard liquid storage tank 6, reaction bed 8, photoelectric signal detection system 10 Sulphate ion measuring device; the sampling and measuring unit also includes a three-way solenoid valve 9, a constant temperature system 14, a pulse pump 2, and a delivery pump 7;
所述的多通道的采样枪1的各通道通过独立冲洗管路与各蛇形冷凝管4入口连接，各独立冲洗管路上分别设置有脉冲泵2且连接共同的冲洗液储罐3；所述的各蛇形冷凝管4连接恒温***14，各蛇形冷凝管4的出口分别设置三通电磁阀9；所述的各三通电磁阀的第一出口分别连接独立的气液分离器11、气体流量计12和气泵13，第二出口设置有脉冲泵2且连接共同的收集液储罐5；所述的收集液储罐5出口连接反应床8和光电信号检测***10， 废液出口连接输送泵7；所述反应床8的输入端还连接有标液储罐6，标液储罐6的出口连接输送泵7；所述的光电信号检测***10的废液出口连接输送泵7；所述气液分离器11的废液出口管路上也设置有脉冲泵2。Each channel of the multi-channel sampling gun 1 is connected to the inlet of each serpentine condensing pipe 4 through an independent flushing pipeline, and each independent flushing pipeline is respectively provided with a pulse pump 2 and connected to a common flushing liquid storage tank 3; Each serpentine condensing pipe 4 is connected to the constant temperature system 14, and the outlet of each serpentine condensing pipe 4 is provided with a three-way solenoid valve 9 respectively; the first outlet of each three-way solenoid valve is respectively connected to an independent gas-liquid separator 11, Gas flow meter 12 and air pump 13, the second outlet is provided with pulse pump 2 and connected to common collection liquid storage tank 5; the outlet of described collection liquid storage tank 5 is connected to reaction bed 8 and photoelectric signal detection system 10, and the waste liquid outlet is connected to A delivery pump 7; the input end of the reaction bed 8 is also connected to a standard liquid storage tank 6, and the outlet of the standard liquid storage tank 6 is connected to the delivery pump 7; the waste liquid outlet of the photoelectric signal detection system 10 is connected to the delivery pump 7; A pulse pump 2 is also arranged on the waste liquid outlet pipeline of the gas-liquid separator 11 .
优选的，所述的采样枪1可以是通道数量大于1的多个通道采样枪，也可以是多个单根采样枪，采用多个采样枪还能进一步缩短***测量响应时间；Preferably, the sampling gun 1 can be a plurality of channel sampling guns with a channel number greater than 1, or a plurality of single sampling guns, and the use of multiple sampling guns can further shorten the system measurement response time;
优选的，所述的采样枪1与烟气的接触面都经过硫酸的钝化处理或采用惰性材质制成，确保采样枪1接触面不与烟气中的SO 3或硫酸蒸汽反应，且加热温度在200-350℃可控，确保抽气采样温度不低于220℃。 Preferably, the contact surfaces of the sampling gun 1 and the flue gas are all passivated by sulfuric acid or made of inert materials to ensure that the contact surface of the sampling gun 1 does not react with SO or sulfuric acid vapor in the flue gas, and the heating The temperature is controllable at 200-350°C to ensure that the extraction sampling temperature is not lower than 220°C.
优选的，所述的蛇形冷凝管4的规格与采样速率有关，其规格为在采用一定采样速率时，能实现SO 3/H 2SO 4蒸气的完全捕集为宜。 Preferably, the specification of the serpentine condensing tube 4 is related to the sampling rate, and the specification should be such that the complete capture of SO 3 /H 2 SO 4 vapor can be achieved when a certain sampling rate is adopted.
优选的，所述的恒温***14可以是水浴、油浴以及任何一种能确保控制蛇形冷凝管4处于恒定温度的保温加热***，使得蛇形冷凝管4所处温度范围为60-95℃。Preferably, the constant temperature system 14 can be a water bath, an oil bath, and any kind of thermal insulation heating system that can ensure that the serpentine condenser tube 4 is kept at a constant temperature, so that the temperature range of the serpentine condenser tube 4 is 60-95°C .
优选的，所述的光电信号测试***10设置温控装置，其温度恒定为室温+3℃。Preferably, the photoelectric signal testing system 10 is provided with a temperature control device whose temperature is constant at room temperature + 3°C.
优选的，所述的气液分离器11和反应床8、气体流量计12均设置有用于降温的制冷***，该制冷***可以是冷水机、压缩制冷机及帕尔贴制冷机等任意一种能给体系降温的制冷***，确保低温区的温度。Preferably, the gas-liquid separator 11, the reaction bed 8, and the gas flow meter 12 are all provided with a refrigeration system for cooling, and the refrigeration system can be any one of a water chiller, a compression refrigerator, a Peltier refrigerator, etc. The refrigeration system that can cool down the system ensures the temperature in the low temperature zone.
优选的，所述的反应床8可以是任意一种可与硫酸根离子进行显色反应的***。Preferably, the reaction bed 8 may be any system capable of color reaction with sulfate ions.
优选的，所述的输送泵7可以是多通道蠕动泵，也可以的多个单通道蠕动泵，还可以是多个脉冲泵。Preferably, the delivery pump 7 may be a multi-channel peristaltic pump, or a plurality of single-channel peristaltic pumps, or a plurality of pulse pumps.
优选的，所述的脉冲泵2，可以替换成单个蠕动泵或是多通道蠕动泵。Preferably, the pulse pump 2 can be replaced by a single peristaltic pump or a multi-channel peristaltic pump.
优选的，所述的控制***15可以是任意一种可编制程序的软件或元件。Preferably, the control system 15 can be any kind of programmable software or components.
本实施例中以设置有双通道的采样枪1为例，如图1所示，采样枪1的 两个通道分别连接第一蛇形冷凝管4A和第二蛇形冷凝管4B；第一蛇形冷凝管4A和第二蛇形冷凝管4B的出口分别设置有第一三通电磁阀9A和第二三通电磁阀9B，入口的两条冲洗液管路上分别设置有第一脉冲泵2A和第二脉冲泵2B；In this embodiment, take the sampling gun 1 provided with two channels as an example, as shown in Figure 1, the two channels of the sampling gun 1 are respectively connected to the first serpentine condenser 4A and the second serpentine condenser 4B; A first three-way solenoid valve 9A and a second three-way solenoid valve 9B are provided at the outlets of the serpentine condensing pipe 4A and the second serpentine condensing pipe 4B respectively, and the first pulse pump 2A and second pulse pump 2B;
在使用时，开启该测量***，启动***标定程序进行测试***标定；When in use, turn on the measurement system, start the system calibration program to calibrate the test system;
待测试***标定完后，进入测试模式，开启第一蛇形冷凝管4A气路通道进行采样，第二蛇形冷凝管4B气路采样通道处于关闭状态。待采样进行到一半时间后，开启第二蛇形冷凝管4B气路采样通道进行采样(此时，第二蛇形冷凝管4B的液路通道处于关闭状态)，待第一蛇形冷凝管4A通道采样结束后，关闭第一气泵13A，启动第一脉冲泵2A向第一蛇形冷凝管4A注入冲洗液冲洗第一蛇形冷凝管4A内壁，并打开第一三通电磁阀9A的液路通道，将冲洗液收集在收集液储罐5中，收集液在输送泵7的动力下先后进入反应床8和光电信号检测***10进行硫酸根离子浓度测试，最后通过控制***15中编写的计算公式算得烟气中的SO 3浓度，并将浓度显示在控制***15的显示屏上； After the test system is calibrated, enter the test mode, open the gas channel of the first serpentine condenser 4A for sampling, and the gas channel of the second serpentine condenser 4B is closed. After half the time of sampling, open the second serpentine condensing tube 4B gas path sampling channel for sampling (at this time, the liquid channel of the second serpentine condensing tube 4B is in a closed state), and wait for the first serpentine condensing tube 4A After the channel sampling is finished, turn off the first air pump 13A, start the first pulse pump 2A to inject flushing liquid into the first serpentine condenser pipe 4A to flush the inner wall of the first serpentine condenser pipe 4A, and open the liquid path of the first three-way solenoid valve 9A The flushing liquid is collected in the collection liquid storage tank 5, and the collection liquid enters the reaction bed 8 and the photoelectric signal detection system 10 successively under the power of the delivery pump 7 to test the sulfate ion concentration, and finally passes the calculation prepared in the control system 15 The formula calculates the SO concentration in the flue gas, and the concentration is displayed on the display screen of the control system 15;
完成冲洗液的收集后，立刻启动第一蛇形冷凝管4A通道的采样程序进行采样，随后第二蛇形冷凝管4B通道完成采样，立即启动第二脉冲泵2B向第二蛇形冷凝管4B注入冲洗液冲洗第二蛇形冷凝管4B内壁，并打开第一电磁阀9A的液路通道，将冲洗液收集在收集液储罐5中。完成冲洗液的收集后，立刻启动第二蛇形冷凝管4B通道的采样程序进行采样，如此依次切换进行，可将该设备的***时间间隔缩短一半，大大降低该***的测试响应时间。After completing the collection of the flushing liquid, immediately start the sampling program of the first serpentine condenser 4A channel for sampling, then the second serpentine condenser 4B channel completes the sampling, and immediately start the second pulse pump 2B to the second serpentine condenser 4B Inject flushing liquid to flush the inner wall of the second serpentine condenser 4B, and open the liquid channel of the first solenoid valve 9A to collect the flushing liquid in the collected liquid storage tank 5 . After the collection of the flushing liquid is completed, immediately start the sampling program of the 4B channel of the second serpentine condenser for sampling. Switching in this way can shorten the system time interval of the equipment by half and greatly reduce the test response time of the system.
基于上述的任意***，本发明还提供一种响应快速的三氧化硫在线连续测量方法，采用双通道的采样枪，所述方法包括，Based on any of the above-mentioned systems, the present invention also provides a fast-response online continuous measurement method for sulfur trioxide, using a dual-channel sampling gun, the method comprising:
反应床8和光电信号检测***10利用标液储罐6中的标液进行测试系 统标定； Reaction bed 8 and photoelectric signal detection system 10 utilize the standard liquid in the standard liquid storage tank 6 to carry out test system calibration;
待测试***标定完后，进入测试模式，开启第一蛇形冷凝管4A气路通道进行采样，第二蛇形冷凝管4B气路采样通道处于关闭状态；待第一蛇形冷凝管4A采样进行到一半时间时，开启第二蛇形冷凝管4B气路采样通道进行采样；After the test system is calibrated, enter the test mode, open the first serpentine condenser 4A gas path for sampling, and the second serpentine condenser 4B gas path sampling channel is closed; wait for the first serpentine condenser 4A to sample When half of the time is reached, the second serpentine condenser 4B gas path sampling channel is opened for sampling;
待第一蛇形冷凝管4A通道采样结束后，向第一蛇形冷凝管4A注入冲洗液冲洗第一蛇形冷凝管4A内壁，并打开与第一电磁阀9A第二出口连接的液路通道，将冲洗液收集在收集液储罐5中；收集液先后进入反应床8和光电信号检测***10进行硫酸根离子浓度测试，并输出至控制***15；After the sampling of the channel of the first serpentine condenser 4A is completed, inject flushing liquid into the first serpentine condenser 4A to wash the inner wall of the first serpentine condenser 4A, and open the liquid channel connected to the second outlet of the first solenoid valve 9A , the flushing liquid is collected in the collected liquid storage tank 5; the collected liquid enters the reaction bed 8 and the photoelectric signal detection system 10 successively for sulfate ion concentration testing, and is output to the control system 15;
第一蛇形冷凝管4A通道的完成冲洗液收集后，进行采样；同时第二蛇形冷凝管4B气路完成采样后，进行冲洗液收集；After the first serpentine condensing tube 4A channel finishes collecting the flushing liquid, sampling is performed; at the same time, after the second serpentine condensing tube 4B gas path completes sampling, the flushing liquid is collected;
重复上述步骤，交替进行第一蛇形冷凝管4A和第二蛇形冷凝管4B的采样和冲洗，实现三氧化硫在线连续测量。The above steps are repeated, and the sampling and flushing of the first serpentine condenser tube 4A and the second serpentine condenser tube 4B are alternately performed to realize online continuous measurement of sulfur trioxide.
其中，in,
所述的第一蛇形冷凝管4A和第二蛇形冷凝管4B上设置有恒温***14，温度控制范围为60-95℃；The first serpentine condenser pipe 4A and the second serpentine condenser pipe 4B are provided with a constant temperature system 14, and the temperature control range is 60-95°C;
所述的光电信号检测***10设置有控温装置，控制温度恒定为室温+3℃；The photoelectric signal detection system 10 is provided with a temperature control device, and the control temperature is constant at room temperature + 3°C;
所述的气液分离器11、反应床8和气体流量计12均设置有用于降温的制冷***。The gas-liquid separator 11, the reaction bed 8 and the gas flow meter 12 are all provided with a cooling system for cooling.
本实施例中使用本发明所述的测量***在如图1***上实施，并采用含25mg/m 3的SO 3/H 2SO 4蒸汽模拟烟气进行试验： In this embodiment, the measurement system of the present invention is used to implement on the system as shown in Fig. 1, and the test is carried out by using SO 3 /H 2 SO 4 steam simulated flue gas containing 25 mg/m 3 :
在实验室里搭建模拟硫酸蒸汽试验台，配置含25mg/m 3的SO 3/H 2SO 4蒸汽模拟烟气，用本发明中所提供的双通道采样***进行测量，同时以单通道采样***进行对比测试，采样时间设置为5分钟。测试结果为单通道和双 通道测试***均测量准确、单通道测试数值显示时间间隔为6.3min，双通道测试数值显示时间间隔为3.15min。能明显减小测试***的响应时间。 Build a simulated sulfuric acid steam test bench in the laboratory, configure SO 3 /H 2 SO 4 steam simulated flue gas containing 25mg/m 3 , measure with the dual-channel sampling system provided in the present invention, and simultaneously use the single-channel sampling system For a comparative test, the sampling time is set to 5 minutes. The test results show that both single-channel and dual-channel test systems are accurate in measurement, the time interval of single-channel test value display is 6.3min, and the time interval of dual-channel test value display is 3.15min. Can significantly reduce the response time of the test system.
实施例2Example 2
本实施例中使用本发明所述的测量***在如图1***上实施，并采用含25mg/m 3的SO 3/H 2SO 4蒸汽模拟烟气进行试验： In this embodiment, the measurement system of the present invention is used to implement on the system as shown in Fig. 1, and the test is carried out by using SO 3 /H 2 SO 4 steam simulated flue gas containing 25 mg/m 3 :
在实验室里搭建模拟硫酸蒸汽试验台，配置含50mg/m 3的SO 3/H 2SO 4蒸汽模拟烟气，用本发明中所提供的双通道采样***进行测量，同时以单通道采样***进行对比测试，采样时间设置为2分钟。测试结果为单通道和双通道测试***均测量准确、单通道测试数值显示时间间隔为2.8min，双通道测试数值显示时间间隔为1.4min。能明显减小测试***的响应时间。 Build a simulated sulfuric acid steam test bench in the laboratory, configure SO 3 /H 2 SO 4 steam simulated flue gas containing 50mg/m 3 , measure with the dual-channel sampling system provided in the present invention, and simultaneously use the single-channel sampling system For a comparative test, the sampling time is set to 2 minutes. The test results show that both single-channel and dual-channel test systems are accurate in measurement, the time interval of single-channel test value display is 2.8min, and the time interval of dual-channel test value display is 1.4min. Can significantly reduce the response time of the test system.
实施例3Example 3
本实用新型一种三氧化硫在线连续测量***，包括由采样枪1、蛇形冷凝管4、冲洗液储罐3、收集液储罐5、标液储罐6、反应床8、三通电磁阀9、气液分离器11、流量积算仪16、第一恒温***17、恒温***14、脉冲泵2、光电信号检测***10、输送泵7、气泵13和气体流量计12组成的采样测量单元，以及控制***15；The utility model is an on-line continuous measurement system for sulfur trioxide, which comprises a sampling gun 1, a serpentine condenser pipe 4, a flushing liquid storage tank 3, a collection liquid storage tank 5, a standard liquid storage tank 6, a reaction bed 8, a three-way electromagnetic Sampling measurement consisting of valve 9, gas-liquid separator 11, flow totalizer 16, first constant temperature system 17, constant temperature system 14, pulse pump 2, photoelectric signal detection system 10, delivery pump 7, air pump 13 and gas flow meter 12 unit, and control system 15;
所述的采样枪1内设置有多个独立的通道，每个通道均连接有独立的蛇形冷凝管4和冲洗液管路；The sampling gun 1 is provided with a plurality of independent channels, and each channel is connected with an independent serpentine condenser 4 and a flushing liquid pipeline;
所述的每条冲洗液管路均设置有脉冲泵2，且与冲洗液储罐3连通；Each of the flushing liquid pipelines is provided with a pulse pump 2 and communicated with the flushing liquid storage tank 3;
所述的蛇形冷凝管4上连接恒温***14，且蛇形冷凝管4的出口均设置有三通电磁阀9；The serpentine condensing pipe 4 is connected with a constant temperature system 14, and the outlet of the serpentine condensing pipe 4 is provided with a three-way solenoid valve 9;
所述的三通电磁阀9的第一出口通过汇集管路依次连接气液分离器11、气体流量计12、流量积算仪16和气泵13，第二出口依次连接脉冲泵2、收集液储罐5、反应床8和光电信号检测***10；The first outlet of the three-way electromagnetic valve 9 is sequentially connected to the gas-liquid separator 11, the gas flow meter 12, the flow totalizer 16 and the air pump 13 through the collection pipeline, and the second outlet is sequentially connected to the pulse pump 2, the collection liquid storage Tank 5, reaction bed 8 and photoelectric signal detection system 10;
所述的收集液储罐5和反应床8之间设置有输送泵7；A transfer pump 7 is arranged between the collected liquid storage tank 5 and the reaction bed 8;
所述的标液储罐6的出口依次连接输送泵7、反应床8和光电信号检测***10；The outlet of the standard liquid storage tank 6 is sequentially connected to the delivery pump 7, the reaction bed 8 and the photoelectric signal detection system 10;
所述的气液分离器11的出口管路上设置有脉冲泵2；所述的气液分离器11、反应床8、气体流量计12和光电信号检测***10置于第一恒温***17中；The outlet pipeline of the gas-liquid separator 11 is provided with a pulse pump 2; the gas-liquid separator 11, the reaction bed 8, the gas flowmeter 12 and the photoelectric signal detection system 10 are placed in the first constant temperature system 17;
优选的，所述的采样枪1采用惰性材质制成或者与烟气的接触面都经过硫酸的钝化处理，确保采样枪1接触面与SO 3/H 2SO 4蒸汽均不反应，其加热温度范围为200-350℃，确保抽气采样温度不低于220℃。 Preferably, the sampling gun 1 is made of inert material or the contact surface with the flue gas is passivated by sulfuric acid to ensure that the contact surface of the sampling gun 1 does not react with the SO 3 /H 2 SO 4 vapor, and the heating The temperature range is 200-350°C, ensure that the extraction sampling temperature is not lower than 220°C.
优选的，所述的蛇形冷凝管4的规格与采样速率有关，其规格为在采用一定采样速率时，能实现SO 3/H 2SO 4蒸气的完全捕集为宜。 Preferably, the specification of the serpentine condensing tube 4 is related to the sampling rate, and the specification should be such that the complete capture of SO 3 /H 2 SO 4 vapor can be achieved when a certain sampling rate is adopted.
优选的，所述的恒温***14可以是温度为60-95℃的水浴或油浴或其他任何一种能确保蛇形冷凝管4处于恒定温度的保温加热***，使蛇形冷凝管4所处温度范围为60-95℃。Preferably, the constant temperature system 14 can be a water bath or an oil bath with a temperature of 60-95° C. or any other heat preservation and heating system that can ensure that the serpentine condensing tube 4 is at a constant temperature, so that the serpentine condensing tube 4 is located The temperature range is 60-95°C.
优选的，所述的第一恒温***17内设置0-5℃和环温+3℃温度区，气液分离器11和反应床8、气体流量计12置于0-5℃区，光电信号检测***10置于环温+3℃温度区。Preferably, the first constant temperature system 17 is set in a temperature zone of 0-5°C and ambient temperature +3°C, the gas-liquid separator 11, the reaction bed 8, and the gas flow meter 12 are placed in the 0-5°C zone, and the photoelectric signal The detection system 10 is placed in the ambient temperature +3°C temperature zone.
优选的，所述的反应床8可以是任意一种可与硫酸根离子进行显色反应的***。Preferably, the reaction bed 8 may be any system capable of color reaction with sulfate ions.
优选的，所述的输送泵7可以是多通道蠕动泵，也可以是多个单通道蠕动泵，还可以是多个脉冲泵。Preferably, the delivery pump 7 may be a multi-channel peristaltic pump, or a plurality of single-channel peristaltic pumps, or a plurality of pulse pumps.
优选的，所述的脉冲泵2可以替换成单个蠕动泵或是多通道蠕动泵。Preferably, the pulse pump 2 can be replaced by a single peristaltic pump or a multi-channel peristaltic pump.
本实施例以设置有双通道的采样枪1***为例，如图2所示，采样枪1的两个通道分别连接第一蛇形冷凝管4A和第二蛇形冷凝管4B；第一蛇形冷凝管4A和第二蛇形冷凝管4B的出口分别设置有第一三通电磁阀9A和第二三通电磁阀9B，入口的两条冲洗液管路上分别设置有第一脉冲泵2A和 第二脉冲泵2B；In this embodiment, the sampling gun 1 system provided with two channels is taken as an example. As shown in FIG. A first three-way solenoid valve 9A and a second three-way solenoid valve 9B are provided at the outlets of the serpentine condensing pipe 4A and the second serpentine condensing pipe 4B respectively, and the first pulse pump 2A and second pulse pump 2B;
在使用时，开启该测量***，启动***标定模式进行测试***标定；When in use, turn on the measurement system, start the system calibration mode to calibrate the test system;
待测试***标定完后，进入测试模式，开启第一蛇形冷凝管4A气路通道进行采样，第二蛇形冷凝管4B气路通道处于关闭状态；待采样结束后，关闭第一蛇形冷凝管4A的气路通道(即控制第一三通电磁阀9A打开第一蛇形冷凝管4A的液路通道)，开启第二蛇形冷凝管4B的气路通道，启动第一脉冲泵2A向第一蛇形冷凝管4A注入冲洗液储罐3中的冲洗液冲洗第一蛇形冷凝管4A内壁进行硫酸液滴的收集，同时第二蛇形冷凝管4B通道开始采样，采样结束后，关闭第二蛇形冷凝管4B气路通道(即控制第二三通电磁阀9B开启第二蛇形冷凝管4B的液路通道)，启动第二脉冲泵2B，向第二蛇形冷凝管4B通道注射冲洗液，开启第一蛇形冷凝管4A的气路通道进行采样，如此依次切换采样冲洗，可达到缩短采样读数间隔，缩短测量***的测量响应时间。After the test system is calibrated, enter the test mode, open the first serpentine condenser 4A air passage for sampling, and the second serpentine condenser 4B air passage is closed; after the sampling is completed, close the first serpentine condenser The air channel of the pipe 4A (i.e. control the first three-way solenoid valve 9A to open the liquid channel of the first serpentine condenser tube 4A), open the air channel of the second serpentine condenser tube 4B, and start the first pulse pump 2A to The first serpentine condenser pipe 4A injects the flushing liquid in the flushing liquid storage tank 3 to flush the inner wall of the first serpentine condenser pipe 4A to collect sulfuric acid droplets, and at the same time, the channel of the second serpentine condenser pipe 4B starts sampling, and after the sampling, close The gas passage of the second serpentine condenser 4B (that is, the second three-way solenoid valve 9B is controlled to open the liquid passage of the second serpentine condenser 4B), the second pulse pump 2B is started, and the passage to the second serpentine condenser 4B Injecting the flushing liquid, opening the air channel of the first serpentine condenser tube 4A for sampling, switching the sampling and flushing sequentially in this way can shorten the sampling reading interval and shorten the measurement response time of the measurement system.
本实施例中使用本实用新型所述的测量***在如图2***上实施，并采用含25mg/m 3的SO 3/H 2SO 4蒸汽模拟烟气进行试验： In this embodiment, the measuring system described in the utility model is used to implement on the system as shown in Fig. 2, and the SO 3 /H 2 SO 4 steam simulated flue gas containing 25mg/ m3 is used for the test:
在实验室里搭建模拟硫酸蒸汽试验台，配置含25mg/m 3的SO 3/H 2SO 4蒸汽模拟烟气，用本实用新型中所提供的双通道的采样枪1及其余***进行测量，同时以单通道采样***进行对比测试，采样时间设置为5分钟。测试结果为单通道和双通道测试***均测量准确、单通道测试数值显示时间间隔为6.3min，双通道测试数值显示时间间隔为5.1min。能明显减小测试***的响应时间。 Build a simulated sulfuric acid steam test bench in the laboratory, configure SO 3 /H 2 SO 4 steam simulated flue gas containing 25mg/m 3 , use the dual-channel sampling gun 1 and other systems provided in the utility model to measure, At the same time, a comparative test was carried out with a single-channel sampling system, and the sampling time was set to 5 minutes. The test results show that both single-channel and dual-channel test systems are accurate in measurement, the time interval of single-channel test value display is 6.3min, and the time interval of dual-channel test value display is 5.1min. Can significantly reduce the response time of the test system.
实施例4Example 4
本实施例中使用本实用新型所述的测量***在如图2***上实施，并采用含50mg/m 3的SO 3/H 2SO 4蒸汽模拟烟气进行试验： In this embodiment, the measurement system described in the utility model is used to implement on the system as shown in Figure 2, and the SO 3 /H 2 SO 4 steam simulated flue gas containing 50mg/ m3 is used for the test:
在实验室里搭建模拟硫酸蒸汽试验台，配置含50mg/m 3的SO 3/H 2SO 4 蒸汽模拟烟气，用本实用新型中所提供的双通道的采样枪1及其余***进行测量，同时以单通道采样***进行对比测试，采样时间设置为2分钟。测试结果为单通道和双通道测试***均测量准确、单通道测试数值显示时间间隔为2.8min，双通道测试数值显示时间间隔为2.1min。能明显减小测试***的响应时间。 Build a simulated sulfuric acid steam test bench in the laboratory, configure SO 3 /H 2 SO 4 steam simulated flue gas containing 50mg/m 3 , use the dual-channel sampling gun 1 and other systems provided in the utility model to measure, At the same time, a comparative test was carried out with a single-channel sampling system, and the sampling time was set to 2 minutes. The test results show that both the single-channel and dual-channel test systems are accurate, the time interval of single-channel test value display is 2.8min, and the time interval of dual-channel test value display is 2.1min. Can significantly reduce the response time of the test system.

Claims (12)

  1. 一种响应快速的三氧化硫在线连续测量***，其特征在于，包括采样测量单元，以及与采样测量单元连接的控制***(15)；A fast-response sulfur trioxide online continuous measurement system is characterized in that it includes a sampling measurement unit, and a control system (15) connected to the sampling measurement unit;
    所述的采样测量单元包括多通道的采样枪(1)，分别与多通道的采样枪(1)各通道一一对应连接的烟气采集装置和冲洗装置，以及共用的硫酸根离子测量装置；The sampling measurement unit includes a multi-channel sampling gun (1), a flue gas collection device and a flushing device connected to each channel of the multi-channel sampling gun (1) in a one-to-one correspondence, and a shared sulfate ion measuring device;
    所述的烟气采集装置包括连接在多通道采样枪(1)各个通道出口处的蛇形冷凝管(4)，通过三通电磁阀(9)的第一出口依次连接在每个蛇形冷凝管(4)出口处的气液分离器(11)、气体流量计(12)和气泵(13)；The flue gas collection device comprises a serpentine condensation pipe (4) connected to each channel outlet of the multi-channel sampling gun (1), connected in turn to each serpentine condensation pipe through the first outlet of the three-way solenoid valve (9). Gas-liquid separator (11), gas flow meter (12) and air pump (13) at the outlet of pipe (4);
    所述的冲洗装置包括分别通过独立冲洗管路与各蛇形冷凝管(4)入口处对应连接的冲洗液储罐(3)；The flushing device includes a flushing liquid storage tank (3) correspondingly connected to the inlet of each serpentine condenser pipe (4) through an independent flushing pipeline;
    所述的硫酸根离子测量装置包括通过三通电磁阀(9)的第二出口连接设置的收集液储罐(5)，以及与收集液储罐(5)出口连接的反应床(8)和光电信号检测***(10)；所述反应床(8)的输入端还连接有标液储罐(6)。Described sulfate ion measuring device comprises the collected liquid storage tank (5) that is connected with the second outlet of three-way electromagnetic valve (9), and the reaction bed (8) that is connected with the collected liquid storage tank (5) outlet and A photoelectric signal detection system (10); the input end of the reaction bed (8) is also connected with a standard liquid storage tank (6).
  2. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***，其特征在于，所述的采样枪(1)采用至少设置两个通道的多通道采样枪，或者并行的多个单根采样枪。A fast-response sulfur trioxide online continuous measurement system according to claim 1, characterized in that said sampling gun (1) adopts a multi-channel sampling gun with at least two channels, or a plurality of single-channel sampling guns in parallel root sampling gun.
  3. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***，其特征在于，所述的采样枪(1)与烟气的接触面均设置有硫酸钝化层或采用惰性材质制成。A fast-response sulfur trioxide online continuous measurement system according to claim 1, characterized in that the contact surfaces between the sampling gun (1) and the flue gas are all provided with a sulfuric acid passivation layer or made of an inert material. become.
  4. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***，其特征在于，所述的蛇形冷凝管(4)还连接设置有恒温***(14)；所述的恒温***(14)采用水浴、油浴或其他保温加热***。A kind of quick-response sulfur trioxide online continuous measurement system according to claim 1, is characterized in that, described serpentine condensing pipe (4) is also connected and is provided with constant temperature system (14); Described constant temperature system ( 14) Use water bath, oil bath or other thermal insulation heating system.
  5. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***，其特征在于，所述的光电信号检测***(10)设置控温装置；所述的气液分离器(11)、反应床(8)和气体流量计(12)均设置有用于降温的制冷***。A kind of fast-response sulfur trioxide online continuous measurement system according to claim 1, characterized in that, said photoelectric signal detection system (10) is provided with a temperature control device; said gas-liquid separator (11), Both the reaction bed (8) and the gas flow meter (12) are provided with a cooling system for cooling.
  6. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***，其特征在于，所述的反应床(8)采用任意一种与硫酸根离子进行显色反应的***。A fast-response online continuous measurement system for sulfur trioxide according to claim 1, characterized in that the reaction bed (8) adopts any system that reacts with sulfate ions for color development.
  7. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***，其特征在于，所述的冲洗***还包括输送泵(7)，所述的输送泵(7)采用多通道蠕动泵，多个单通道蠕动泵，或者多个脉冲泵中的任意一种；所述的输送泵(7)分别连接收集液储罐(5)的废液出口、标液储罐(6)的出口和光电信号检测***(10)的废液出口，用于输送对应介质。A fast-response sulfur trioxide online continuous measurement system according to claim 1, characterized in that the flushing system also includes a delivery pump (7), and the delivery pump (7) adopts a multi-channel peristaltic pump , a plurality of single-channel peristaltic pumps, or any one of a plurality of pulse pumps; the delivery pump (7) is respectively connected to the waste liquid outlet of the collection liquid storage tank (5) and the outlet of the standard liquid storage tank (6) And the waste liquid outlet of the photoelectric signal detection system (10), used to transport the corresponding medium.
  8. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***，其特征在于，所述的三通电磁阀(9)的第二出口管路、气液分离器(11)的废液出口管路和各个冲洗液管路上分别设置有脉冲泵(2)或单个蠕动泵；所述的多个三通电磁阀(9)的第二出口管路和/或多个冲洗液管路上分别设置的脉冲泵(2)为多通道蠕动泵，多通道蠕动泵的通道数量分别与蛇形冷凝管(4)的出口数量和/或冲洗管路的数量对应。A fast-response sulfur trioxide online continuous measurement system according to claim 1, characterized in that, the second outlet pipeline of the three-way solenoid valve (9), the waste gas of the gas-liquid separator (11) A pulse pump (2) or a single peristaltic pump is respectively arranged on the liquid outlet pipeline and each flushing fluid pipeline; The respectively provided pulse pumps (2) are multi-channel peristaltic pumps, and the number of channels of the multi-channel peristaltic pumps corresponds to the number of outlets of the serpentine condensation pipe (4) and/or the number of flushing pipelines.
  9. 一种响应快速的三氧化硫在线连续测量方法，其特征在于，基于权利要求1-8任意一项所述的***，采用双通道的采样枪，所述方法包括，A fast-response sulfur trioxide online continuous measurement method is characterized in that, based on the system described in any one of claims 1-8, a dual-channel sampling gun is used, and the method comprises,
    反应床(8)和光电信号检测***(10)利用标液储罐(6)中的标液进行测试***标定；The reaction bed (8) and the photoelectric signal detection system (10) use the standard liquid in the standard liquid storage tank (6) to calibrate the test system;
    待测试***标定完后，进入测试模式，开启第一蛇形冷凝管(4A)气路通道进行采样，第二蛇形冷凝管(4B)气路采样通道处于关闭状态；待第一蛇形冷凝管(4A)采样进行到一半时间时，开启第二蛇形冷凝管(4B)气路采样通道进行采样；After the test system is calibrated, enter the test mode, open the gas channel of the first serpentine condenser (4A) for sampling, and the gas sampling channel of the second serpentine condenser (4B) is closed; wait for the first serpentine condensate When the tube (4A) sampling is halfway through, open the second serpentine condenser tube (4B) gas path sampling channel for sampling;
    待第一蛇形冷凝管(4A)通道采样结束后，向第一蛇形冷凝管(4A)注入冲洗液冲洗第一蛇形冷凝管(4A)内壁，并打开与第一电磁阀(9A)第二出口连接的液路通道，将冲洗液收集在收集液储罐(5)中；收集液先 后进入反应床(8)和光电信号检测***(10)进行硫酸根离子浓度测试，并输出至控制***(15)；After the channel sampling of the first serpentine condenser (4A) is completed, inject flushing liquid into the first serpentine condenser (4A) to wash the inner wall of the first serpentine condenser (4A), and open the first solenoid valve (9A) The liquid channel connected to the second outlet collects the flushing liquid in the collection liquid storage tank (5); the collection liquid enters the reaction bed (8) and the photoelectric signal detection system (10) successively for sulfate ion concentration testing, and outputs to control system (15);
    第一蛇形冷凝管(4A)通道的完成冲洗液收集后，进行采样；同时第二蛇形冷凝管(4B)气路完成采样后，进行冲洗液收集；After the first serpentine condensing tube (4A) channel finishes collecting the flushing liquid, sampling is performed; at the same time, after the second serpentine condensing tube (4B) gas circuit completes sampling, the flushing liquid is collected;
    重复上述步骤，交替进行第一蛇形冷凝管(4A)和第二蛇形冷凝管(4B)的采样和冲洗，实现三氧化硫在线连续测量。The above steps are repeated, and the sampling and flushing of the first serpentine condenser (4A) and the second serpentine condenser (4B) are carried out alternately, so as to realize online continuous measurement of sulfur trioxide.
  10. 根据权利要求9所述的一种响应快速的三氧化硫在线连续测量方法，其特征在于，A kind of fast-response sulfur trioxide online continuous measurement method according to claim 9, characterized in that,
    所述的第一蛇形冷凝管(4A)和第二蛇形冷凝管(4B)上设置有恒温***(14)，温度控制范围为60-95℃；The first serpentine condenser (4A) and the second serpentine condenser (4B) are provided with a constant temperature system (14), and the temperature control range is 60-95°C;
    所述的光电信号检测***(10)设置有控温装置，控制温度恒定为室温+3℃；The photoelectric signal detection system (10) is provided with a temperature control device, and the control temperature is constant at room temperature + 3°C;
    所述的气液分离器(11)、反应床(8)和气体流量计(12)均设置有用于降温的制冷***。The gas-liquid separator (11), reaction bed (8) and gas flow meter (12) are all provided with a cooling system for cooling.
  11. 一种响应快速的三氧化硫在线连续测量***，其特征在于，包括采样测量单元，与采样测量单元连接的控制***(15)；A fast-response sulfur trioxide online continuous measurement system is characterized in that it includes a sampling measurement unit and a control system (15) connected to the sampling measurement unit;
    所述的采样测量单元包括采样枪(1)，采样枪(1)内设置有至少两个通道，且各通道一一对应连接有独立的蛇形冷凝管(4)和冲洗液管路；The sampling measurement unit includes a sampling gun (1), at least two channels are arranged in the sampling gun (1), and each channel is connected with an independent serpentine condenser (4) and flushing liquid pipeline one by one;
    所述的每个蛇形冷凝管(4)的入口还通过冲洗液管路连接设置有冲洗液储罐(3)，出口分别设置有三通电磁阀(9)；每个三通电磁阀(9)的第一出口通过汇集管路依次连接设置有气液分离器(11)、气体流量计(12)、流量积算仪(16)和气泵(13)，第二出口依次连接设置有收集液储罐(5)、反应床(8)和光电信号检测***(10)；The inlet of each serpentine condensing pipe (4) is also connected with a flushing liquid storage tank (3) through the flushing liquid pipeline, and the outlet is respectively provided with a three-way solenoid valve (9); each three-way solenoid valve (9) The first outlet of ) is sequentially connected with a gas-liquid separator (11), a gas flow meter (12), a flow totalizer (16) and an air pump (13) through a collection pipeline, and the second outlet is sequentially connected with a collection liquid storage tank (5), reaction bed (8) and photoelectric signal detection system (10);
    所述反应床(8)的输入端还连接有标液储罐(6)。The input end of the reaction bed (8) is also connected with a standard liquid storage tank (6).
  12. 根据权利要求1所述的一种响应快速的三氧化硫在线连续测量***， 其特征在于，所述的气液分离器(11)、气体流量计(12)、反应床(8)和光电信号检测***(10)均设置在第一恒温***(17)中；所述的第一恒温***(17)内设置0-5℃和环温+3℃两种温度区；所述的气液分离器(11)、反应床(8)和气体流量计(12)置于0-5℃区，光电信号检测***(10)置于环温+3℃温度区。A fast-response sulfur trioxide online continuous measurement system according to claim 1, characterized in that the gas-liquid separator (11), gas flow meter (12), reaction bed (8) and photoelectric signal The detection systems (10) are all arranged in the first constant temperature system (17); two temperature zones of 0-5°C and ambient temperature +3°C are set in the first constant temperature system (17); the gas-liquid separation The device (11), reaction bed (8) and gas flow meter (12) are placed in the 0-5°C zone, and the photoelectric signal detection system (10) is placed in the ambient temperature +3°C temperature zone.
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