CN206756533U - A kind of flue gas sampler - Google Patents

A kind of flue gas sampler Download PDF

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Publication number
CN206756533U
CN206756533U CN201720505658.7U CN201720505658U CN206756533U CN 206756533 U CN206756533 U CN 206756533U CN 201720505658 U CN201720505658 U CN 201720505658U CN 206756533 U CN206756533 U CN 206756533U
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China
Prior art keywords
sampling
flue gas
inserting tube
flue
temperature
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CN201720505658.7U
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Chinese (zh)
Inventor
孙栓柱
帅云峰
王明
周志兴
许国强
魏威
佘国金
肖明成
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Jiangsu Fangtian Power Technology Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Jiangsu Fangtian Power Technology Co Ltd
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Application filed by State Grid Corp of China SGCC, State Grid Jiangsu Electric Power Co Ltd, Jiangsu Fangtian Power Technology Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201720505658.7U priority Critical patent/CN206756533U/en
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Abstract

The utility model discloses a kind of flue gas sampler, including sampling inserting tube, sampling cavity, upsampling filter, heater, backflush unit;Sampling inserting tube is arranged on the front end of flue gas sampler, and one end is inserted in flue, and the other end connects with sampling cavity, for sample gas to be collected into sampling cavity body;Heater includes heating rod and heating jacket;Heating rod is arranged in sampling cavity body, to carrying out heating and thermal insulation in sampling cavity body;Heating jacket is arranged on outside the sampling inserting tube being connected with flue, is carried out heating and thermal insulation to sampling inserting tube, is prevented flue gas from being condensed before sampling cavity is entered;Upsampling filter is arranged in sampling cavity body, is carried out filtrating smoke dust to sample gas, is prevented dust from entering inside analysis system;Backflush unit periodically carries out blowback to sampling inserting tube and upsampling filter, prevents that flue dust from blocking sampling inserting tube, upsampling filter causes flue gas sampling airway blockage.

Description

A kind of flue gas sampler
Technical field
It the utility model is related to a kind of flue gas sampler, and in particular to a kind of superhigh temperature, low-loss flue gas sampling dress Put, belong to coal-fired, the continuous on-line monitoring system field of combustion turbine group flue gas.
Background technology
Existing sampling apparatus running temperature is low(120℃-150℃)So that flue gas sampling inside cavity and with companion Heat pipe connecting portion condenses into water to the cold, absorbs substantial amounts of SO2;Sampling apparatus is connected with walling of flue by flange sleeve, connection The sleeve at position is exposed outside, and traditional method is simply incubated with insulation material, though effective unobvious, absorption tower A large amount of mud are mixed with the high-humidity gas fume taken out of, are condensed to the cold when sampling inserting tube by this section, equipment is easily caused and blocks, be rotten Erosion.
Current most of coal unit has completed minimum discharge transformation, and Air Pollutant Emission concentration basically reaches combustion gas wheel Unit emission limit(I.e. under the conditions of benchmark oxygen content 6%, particulate matter, sulfur dioxide, discharged nitrous oxides concentration be not high respectively In 10,35,50 milligrams/cubic metre).Concentration of emission limit value is greatly reduced before relatively transforming.Somewhat SO2 absorption, measures number According to very large deviation will be produced, each sample unit is necessarily required to be in the condition of high temperature in order to reduce loss;Sample inserting tube simultaneously Need to be heated, it is ensured that do not condense positioned at flue and the flue gas of flange coupling part in feeler lever, while increase the blowback of system Time and frequency.
Utility model content
Purpose of utility model:For above-mentioned deficiency of the prior art, the utility model provides a kind of flue gas sampler.
Technical scheme:In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of flue gas sampler, it is characterised in that:Including sampling inserting tube, sampling cavity, upsampling filter, heating dress Put, backflush unit;
Sampling inserting tube is arranged on the front end of flue gas sampler, and one end is inserted in flue, and the other end connects with sampling cavity, For sample gas to be collected into sampling cavity body;
Heater includes heating rod and heating jacket;Heating rod is arranged in sampling cavity body, to being carried out in sampling cavity body Heating and thermal insulation;Heating jacket is arranged on outside the sampling inserting tube being connected with flue, is carried out heating and thermal insulation to sampling inserting tube, is prevented flue gas Condensed before sampling cavity is entered;
Upsampling filter is arranged in sampling cavity body, is carried out filtrating smoke dust to sample gas, is prevented dust from entering in analysis system Portion;
Backflush unit periodically carries out blowback to sampling inserting tube and upsampling filter, prevents flue dust from blocking sampling inserting tube, sampling Filter causes flue gas sampling airway blockage.
Preferably, described flue gas sampler, it is characterised in that:The upsampling filter is ceramic or stainless Steel upsampling filter.
Preferably, described flue gas sampler, it is characterised in that:Also include flange sleeve, the sampling is visited Pipe is connected by flange sleeve with sampling cavity body phase.
Preferably, described flue gas sampler, it is characterised in that:Flue gas sampler touches equipped with temperature alarming Point, when sampler temperature is more or less than setting limit value, triggering alarm, system can stop sampling.
Preferably, described flue gas sampler, it is characterised in that:Also include temperature sensor, the temperature Sensor is arranged on above sampling inside cavity, using PT100 temperature sensors.
Preferably, described flue gas sampler, it is characterised in that:Also include temperature conditioning unit, heater with Temperature conditioning unit connects, by the temperature of temperature conditioning unit control heater regulation sampling inside cavity.
Preferably, described flue gas sampler, it is characterised in that:The material of the sampling inserting tube is stainless steel Pipe.Beneficial effect:
A kind of flue gas sampler provided by the utility model, there is advantages below:
1.200 DEG C of unique design uses of gas sampling probe can apply to various working condition;
2. a variety of sampling pipes and upsampling filter can be supported the use(Ceramics are standard type), have great filter area and Capacity, system have good air-tightness, and instrument need not be used when changing filtration core, and need not pull down probe and probe tube Line, greatly reduce maintenance workload;
3. the subsidiary special heater of gas sampling probe can heat to whole cavity, temperature control is by temperature control Device and PT-100 RTD combination processed is completed;
4. reliable, the response time is rapid;
It is 5. convenient for installation and maintenance.
Brief description of the drawings
Fig. 1 is the utility model principle schematic diagram;
Fig. 2 and Fig. 3 is structure structure chart of the present utility model.
In figure:It is temperature sensor 1, heating rod 2, temperature conditioning unit 3, solid-state relay 4, sampling inserting tube 5, heating jacket 6, anti- Blow bellows 7, sampling cavity 8, upsampling filter 9.
Embodiment
The utility model is further described with reference to specific embodiment.
As shown in Figure 1 to Figure 3, be a kind of flue gas sampler of the utility model, including sampling inserting tube 5, sampling cavity 8, Upsampling filter 9, heater, backflush unit;
Sampling inserting tube is arranged on the front end of flue gas sampler, and one end is inserted in flue, and the other end connects with sampling cavity, For collecting sample gas in sampling cavity body;
Heater includes heating rod and heating jacket;Heating rod is arranged in sampling cavity body, to being carried out in sampling cavity body Heating and thermal insulation;Heater in complete equipment and sampling cavity body to carrying out heating and thermal insulation;
Upsampling filter is arranged in sampling cavity body, is carried out filtrating smoke dust to sample gas, is prevented dust from entering in analysis system Portion;
Backflush unit periodically carries out blowback to sampling inserting tube and upsampling filter, prevents flue dust from blocking sampling inserting tube, sampling Filter causes flue gas sampling airway blockage.
The upsampling filter is generally 2 μm for ceramics or stainless steel upsampling filter, filtering accuracy.
Flange sleeve is provided with outside flue, a heating jacket is set outside the sampling inserting tube being connected with flue, sampling is visited Pipe carries out heating and thermal insulation, prevents the flue gas of high temperature from being condensed before sampler is entered.
Flue gas sampler is furnished with a secondary low-temperature warning contact, when sampler temperature is high/low in setting limit value(5℃)When, Triggering alarm, system can stop sampling.
As shown in Figures 2 and 3, the flue gas sampler of the present embodiment, including temperature sensor 1, heating rod 2, temperature control list Member 3, solid-state relay 4, sampling inserting tube 5, heating jacket 6, blowback bellows 7, sampling cavity 8, upsampling filter 9.
The front end of flue gas sampler is a SS316 stainless steels sampling inserting tube 5, and sampling inserting tube is by thread forms with adopting Sampling device body flange sleeve connection, general length are 1.5 meters or so(Specific length is determined according to the size of flue), it is ensured that system The sample collected is flue gas in the middle part of flue;Heating jacket 6 is set in outside sampling inserting tube, passes through flange method and sampling apparatus Body connects, and the main function of heating jacket 6 is to prevent the flue gas condensing condensation in the exposed sampling inserting tube outside flue, and it is powered Equally to be controlled to the heating power supply for sampling cavity, heating-up temperature at 150 DEG C.Sampling inserting tube 5 be made up of stainless steel tube, one end with Sampling cavity 8 connects, and in other end insertion flue, the flue-gas temperature that general wet desulphurization comes out is at 50 DEG C or so, and humidity is 13% Left and right, for prevent the flue gas of high temperature enter sampler before condense, only to flue outside flange sleeve carry out insulation be it is inadequate, Still need to increase a heating jacket 6, this section of sampling inserting tube is heated, heating jacket 6 and the heating rod 2 in sampling cavity body Public power supply all the way.
Sample gas is pooled in sampling cavity 8 by sampling inserting tube 5, by heating and thermal insulation and the filtering dust of upsampling filter 9 Heated sampling line enters analysis system rack again afterwards.
Upsampling filter 9 carries out filtrating smoke dust to sample gas, prevents dust from entering inside analysis system.
Backflush unit periodically carries out blowback to sampling inserting tube and upsampling filter 9, prevents flue dust from blocking sample gas sampling and visiting Pipe, filter cause flue gas sampling airway blockage.Blowback source of the gas typically supplies compressed air for instrument using factory, passes through solenoid valve control The break-make of purge gas, blowback are realized by impulse form, that is, are blown and stopped within 1 second 1 second, and another blow-through is swept 30 seconds after continuing 30 seconds, is Ensure that blowback air is dried, gas is preheated by one section of blowback bellows 7 before cavity 8 entering to sample, it is ensured that is blown into Gas in be not in aqueous water.During sampling apparatus blowback, in order to prevent from producing dust, spot in purge with heat tracing Pipe brings pretreatment system into, the electromagnetism valve events in blowback, drives pneumatic operated valve work, and cut-out sample gas enters analysis system.
Sampling apparatus is integrally heated by temperature conditioning unit 3 to control, and temperature sensor 1 is arranged on above sampling cavity, is adopted With PT100, signal is linked into inside temperature conditioning unit, is monitored in real time, and temperature conditioning unit is according to inner setting parameter and sampling cavity The real time temperature of body exports the break-make of 24V power supplies solid-state relay 4, so as to controlling the power supply of heating rod 2.In sampling cavity The both sides of body are heated to complete equipment simultaneously equipped with two heating rods 2, and the PID modules carried by temperature conditioning unit 3 are carried out Regulation, controls error ± 3 DEG C, and the temperature of heating rod is set in 180 DEG C(Reach as high as 220 DEG C), and set low-temperature warning limit value (Less than 5 DEG C of design temperature).The actual temperature and design temperature of sampler are simultaneously displayed on temperature conditioning unit.Sampling apparatus Wrapped up inside cover with insulation material, it is ensured that internal insulation.
During sampling apparatus long-play, it is understood that there may be the problem of blocking.Ordinary circumstance uses compressed air for instrument (0.5MPa)As source of the gas, impulse blowing mode carries out regular purge to sampling probe upsampling filter.
Described above is only preferred embodiment of the present utility model, it should be pointed out that:For the common skill of the art For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and Retouching also should be regarded as the scope of protection of the utility model.

Claims (7)

  1. A kind of 1. flue gas sampler, it is characterised in that:Including sampling inserting tube, sampling cavity, upsampling filter, heater, Backflush unit;
    Sampling inserting tube is arranged on the front end of flue gas sampler, and one end is inserted in flue, and the other end connects with sampling cavity, is used for Sample gas is collected into sampling cavity body;
    Heater includes heating rod and heating jacket;Heating rod is arranged in sampling cavity body, to being heated in sampling cavity body Insulation;Heating jacket is arranged on outside the sampling inserting tube being connected with flue, is carried out heating and thermal insulation to sampling inserting tube, is prevented flue gas from entering Condensed before entering to sample cavity;
    Upsampling filter is arranged in sampling cavity body, is carried out filtrating smoke dust to sample gas, is prevented dust from entering inside analysis system;
    Backflush unit periodically carries out blowback to sampling inserting tube and upsampling filter, prevents flue dust from blocking sampling inserting tube, resampling filter Device causes flue gas sampling airway blockage.
  2. 2. flue gas sampler according to claim 1, it is characterised in that:The upsampling filter is ceramics or stainless steel Upsampling filter.
  3. 3. flue gas sampler according to claim 1, it is characterised in that:Also include flange sleeve, the sampling inserting tube Connected by flange sleeve with sampling cavity body phase.
  4. 4. flue gas sampler according to claim 1, it is characterised in that:Flue gas sampler touches equipped with temperature alarming Point, when sampler temperature is more or less than setting limit value, triggering alarm, system can stop sampling.
  5. 5. flue gas sampler according to claim 1, it is characterised in that:Also include temperature sensor, the temperature passes Sensor is arranged on above sampling inside cavity, using PT100 temperature sensors.
  6. 6. flue gas sampler according to claim 1, it is characterised in that:Also include temperature conditioning unit, heater and temperature Unit connection is controlled, by the temperature of temperature conditioning unit control heater regulation sampling inside cavity.
  7. 7. flue gas sampler according to claim 1, it is characterised in that:The material of the sampling inserting tube is stainless steel Pipe.
CN201720505658.7U 2017-05-08 2017-05-08 A kind of flue gas sampler Active CN206756533U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720505658.7U CN206756533U (en) 2017-05-08 2017-05-08 A kind of flue gas sampler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
CN206756533U true CN206756533U (en) 2017-12-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109374360A (en) * 2018-12-11 2019-02-22 苏州曼德克光电有限公司 A kind of smoke sampling heating feeler lever
CN112378712A (en) * 2020-10-26 2021-02-19 江苏方天电力技术有限公司 Flue gas mixing and sampling device
CN113358423A (en) * 2021-05-20 2021-09-07 合肥学院 Quasi-continuous environment atmospheric gas sampling device
CN114894558A (en) * 2022-07-11 2022-08-12 南京霍普斯科技有限公司 High-temperature explosion-proof sampling probe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109374360A (en) * 2018-12-11 2019-02-22 苏州曼德克光电有限公司 A kind of smoke sampling heating feeler lever
CN112378712A (en) * 2020-10-26 2021-02-19 江苏方天电力技术有限公司 Flue gas mixing and sampling device
CN113358423A (en) * 2021-05-20 2021-09-07 合肥学院 Quasi-continuous environment atmospheric gas sampling device
CN114894558A (en) * 2022-07-11 2022-08-12 南京霍普斯科技有限公司 High-temperature explosion-proof sampling probe

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