CN205300864U - Boiler afterbody flue air leakage coefficient's quick detecting system - Google Patents
Boiler afterbody flue air leakage coefficient's quick detecting system Download PDFInfo
- Publication number
- CN205300864U CN205300864U CN201521135403.3U CN201521135403U CN205300864U CN 205300864 U CN205300864 U CN 205300864U CN 201521135403 U CN201521135403 U CN 201521135403U CN 205300864 U CN205300864 U CN 205300864U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- air leakage
- leakage coefficient
- module
- drive pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a boiler afterbody flue air leakage coefficient's quick detecting system, realizes the segmentation of afterbody flue, subregion oxygen volume on -line measuring through installing multiple spot oxygen volume sampling device additional in boiler afterbody flue over heater entry, re -heater entry, economizer entry, air preheater entry, a plurality of regions of air preheater export, multiple spot oxygen volume testing arrangement includes sampling tube, drive pipe, flue gas refrigerating module, flue gas hybrid module, flue gas filter module, aspiration pump, condenser, oxygen scale and data acquisition system, calculate air leakage coefficient and judge the afterbody flue region of leaking out based on different zone oxygen volume test result, the utility model discloses can set up wantonly according to boiler afterbody flue size and measure the region, also can arrange measuring point figure place volume and position in a flexible way to same measuring position according to flue section size, have precision height, stable, the cost low grade advantage of operation, can extensively be applicable to use such as boiler afterbody flue air leakage coefficient short -term test and the supervision of oxygen volume.
Description
Technical field
This utility model belongs to boiler oxygen amount detection technique field, is specifically related to the rapid detection system of a kind of boiler back end ductwork air leakage coefficient.
Background technology
Boiler is the energy heats feedwater utilizing fuel combustion to discharge, to obtain the equipment of set point of temperature, steam. Fuel enters the burning of boiler needs suitably excessive air to match to reach the efficient burning of fuel, but the too high lifting for boiler oil efficiency of oxygen excess coefficient does not have obvious effect, can improve air-introduced machine on the contrary and exert oneself increase station service; Oxygen amount is too low, can cause that fuel combustion is insufficient and cause energy waste, also can affect boiler operatiopn safety, and therefore monitoring Oxygen Amount in Flue Gas has great significance for boiler implosion. But leaking out of boiler back end ductwork can cause that relatively large deviation occurs in boiler oxygen content measurement, bring adverse effect to burning in boiler Boiler pressure control and stove. Additionally, leaking out of boiler also can increase exerting oneself of air-introduced machine, improve the station service power consumption rate of power plant.
At present, the detection of boiler oxygen amount mainly relies in back-end ductwork arranges oxygen measurement element such as zirconia sensor, owing to back-end ductwork cross section is relatively big, zones of different oxygen amount distribution in same cross section has certain fluctuation, only arranges that near wall side measuring point cannot the accurate actual oxygen amount of flue gas at flue. Therefore develop a set of can in different temperatures region can both accurate stable run oxygen amount test system for detection back-end ductwork air leakage coefficient have great importance.
Summary of the invention
In order to overcome above-mentioned prior art Problems existing, the purpose of this utility model is in that to provide the rapid detection system of a kind of boiler back end ductwork air leakage coefficient, back-end ductwork different temperatures region oxygen amount can be realized quick and precisely measure, be conducive to the intense adjustment of boiler and the real-time detection of back-end ductwork air leakage coefficient.
In order to achieve the above object, this utility model adopts the following technical scheme that
A kind of rapid detection system of boiler back end ductwork air leakage coefficient, the oxygen amount including the superheater entrance of each heat exchanger 2 being arranged in boiler back end ductwork 1, reheater entrance, economizer entrance, air preheater entrance and/or air preheater exit tests system; Described oxygen amount test system includes the smoke sampling module 3, flue gas refrigerating module 4, flue gas mixing module 5, smoke filtration module 6, air pump 7, condenser 8 and the oxygen meter 9 that are sequentially connected with, also includes being arranged between smoke sampling module 3 and flue gas refrigerating module 4 for detecting the gas bypass module 10 whether probe tube blocks and purge pipeline by compressing air;
Described smoke sampling module 3 includes drive pipe 11 and one or many probe tubes 12 being layed in drive pipe 11; Having thief hole 16 bottom described drive pipe 11, thief hole 16 diameter mates with probe tube 12 external diameter, and probe tube 12 stretches out from thief hole 16; Described drive pipe 11 one end is placed in stove, and termination is fixed as expansion dead point, and the other end stretches out stove from furnace wall, and as free wxpansion end, end is opening to be connected with the flue gas refrigerating module 4 outside facilitating probe tube 12 with stove.
Measurement data is carried out observing on the spot or uploading to boiler centralized control system in real time by data collecting system carrying out remote online observation and record by described oxygen amount test system.
Described drive pipe 11 is formed by connecting by multiple drive pipe unit 13, and the junction 17 between drive pipe unit 13 connects for welding or bolt; Drive pipe unit 13 length is 0.5m��3m, and external diameter is 30mm��200mm, and wall thickness is 2mm��10mm, and total length is determined according to the sectional dimension of boiler back end ductwork 1.
Described drive pipe 11 plays protection and the effect supported, upper cap pipe 14 and lower support pipe 15 fasten and form, have thief hole 16 bottom lower support pipe 15.
Being welded and fixed between described probe tube 12 and thief hole 16, probe tube 12 external diameter is 5mm��20mm, and wall thickness is 1mm��5mm.
The material of described drive pipe 11 and probe tube 12 is metal material.
Stating metal material is high-temperature alloy or ordinary carbon steel.
The flue gas of described flue gas refrigerating module 4 is cooled through water-cooled or air-cooled realization, heat-transfer surface be light pipe type, around pipe or finned.
The detection method of the rapid detection system of a kind of boiler back end ductwork air leakage coefficient described above, flue gas is gathered by smoke sampling module 3, through flue gas refrigerating module 4, flue-gas temperature is cooled down, then pass through flue gas mixing module 5 by the flue gas mix homogeneously in the probe tube of each road, the solid particle in flue gas is filtered again through smoke filtration module 6, bled by air pump 7 and flue gas is sent into the moisture content that condenser 8 is removed in flue gas, measure Oxygen Amount in Flue Gas eventually through oxygen meter 9, calculate air leakage coefficient finally according to Oxygen Amount in Flue Gas.
Compared to the prior art relatively, this utility model possesses following advantage:
1. this detection method is that multipoint mode measures system, and certainty of measurement is high, the impact that to be little affected by flue oxygen amount field uneven.
2. measure system operating temperatures wide scope, it is possible to arrange at boiler back end ductwork arbitrary region, stable and reliable operation.
3. being easy to on-line checking, credible result degree is high.
Accompanying drawing explanation
Fig. 1 is that sampling module back-end ductwork of the present utility model arranges schematic diagram.
Fig. 2 is the structural representation of this utility model rapid detection system.
Fig. 3 is smoke sampling module diagram of the present utility model.
Fig. 4 is smoke sampling module profile of the present utility model.
Fig. 5 is drive pipe cell side view of the present utility model.
Fig. 6 is lower support pipe top view of the present utility model.
In figure:
1 boiler back end ductwork; 2 heat exchangers; 3 smoke sampling modules; 4 flue gas refrigerating modules; 5 flue gas mixing modules; 6 smoke filtration modules; 7 air pumps; 8 condensers; 9 oxygen meters; 10 gas bypass modules; 11 drive pipes; 12 probe tubes; 13 drive pipe unit; 14 upper cap pipes; 15 lower support pipes; 16 thief holes; 17 junctions.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail:
Back-end ductwork air leakage coefficient detection system shown in embodiment 1: Fig. 1 is arranged in air preheater outlet and porch. As shown in Figure 2, flue gas is gathered by smoke sampling module 3, through flue gas refrigerating module 4, flue-gas temperature is cooled down, then pass through flue gas mixing module 5 by the flue gas mix homogeneously in the probe tube of each road, the solid particle in flue gas is filtered again through smoke filtration module 6, bled by air pump 7 and flue gas is sent into the moisture content that condenser 8 is removed in flue gas, measure Oxygen Amount in Flue Gas eventually through oxygen meter 9. The air leakage coefficient of air preheater can be calculated, such that it is able to the state of air preheater is judged fast and accurately by the measurement oxygen amount value of air preheater outlet and porch. As it is shown on figure 3, wherein, drive pipe unit 13 length of smoke sampling module 3 can be 1m, and external diameter can be 60mm, and wall thickness can be 5mm, and total length can be defined as 5m according to flue 1 sectional dimension, by being welded to connect between tube unit 13. As shown in Figure 4, Figure 5 and Figure 6, opening 8mm diameter thief hole 16 in the middle part of lower support pipe 15 in each drive pipe unit 13, fix a probe tube 12 in each thief hole 16, whole smoke sampling module 3 can arrange 5 probe tubes, probe tube external diameter 8mm, wall thickness 2mm. The material selection ordinary carbon steel of smoke sampling module.
The position such as after the back-end ductwork air leakage coefficient detection system shown in embodiment 2: Fig. 1 is arranged in high temperature superheater, after low temperature superheater, after economizer and after air preheater. As shown in Figure 2, flue gas is gathered by smoke sampling module 3, through flue gas refrigerating module 4, flue-gas temperature is cooled down, then pass through flue gas mixing module 5 by the flue gas mix homogeneously in the probe tube of each road, the solid particle in flue gas is filtered again through smoke filtration module 6, bled by air pump 7 and flue gas is sent into the moisture content that condenser 8 is removed in flue gas, measure Oxygen Amount in Flue Gas eventually through oxygen meter 9. Situation of leaking out and the air leakage parts of boiler back end ductwork is may diagnose that by contrasting the oxygen content measurement result of back-end ductwork different parts. As it is shown on figure 3, wherein, drive pipe unit 13 length of smoke sampling module 3 can be 2m, and external diameter can be 80mm, and wall thickness can be 6mm, and total length can be defined as 8m according to flue 1 sectional dimension, by being welded to connect between tube unit. As shown in Figure 4, Figure 5 and Figure 6, opening 10mm diameter thief hole 16 in the middle part of lower support pipe 15 in each drive pipe unit 13, fix a probe tube 12 in each thief hole 16, whole smoke sampling module 3 can arrange 4 probe tubes, probe tube external diameter 10mm, wall thickness 2mm. Smoke sampling module after high temperature superheater and after low temperature superheater adopts Cr25Ni20, and the smoke sampling module after economizer and after air preheater adopts carbon steel material.
Claims (7)
1. the rapid detection system of a boiler back end ductwork air leakage coefficient, it is characterised in that: include the oxygen amount test system being arranged in the superheater entrance of each heat exchanger (2) of boiler back end ductwork (1), reheater entrance, economizer entrance, air preheater entrance and/or air preheater exit; Described oxygen amount test system includes the smoke sampling module (3), flue gas refrigerating module (4), flue gas mixing module (5), smoke filtration module (6), air pump (7), condenser (8) and the oxygen meter (9) that are sequentially connected with, also includes being arranged between smoke sampling module (3) and flue gas refrigerating module (4) for detecting the gas bypass module (10) whether probe tube blocks and purge pipeline by compressing air;
Described smoke sampling module (3) includes drive pipe (11) and one or many probe tubes (12) being layed in drive pipe (11); Described drive pipe (11) bottom has thief hole (16), and thief hole (16) diameter mates with probe tube (12) external diameter, and probe tube (12) stretches out from thief hole (16); Described drive pipe (11) one end is placed in stove, termination is fixed as expansion dead point, the other end stretches out stove from furnace wall, and as free wxpansion end, end is that opening is connected with the flue gas refrigerating module (4) outside facilitating probe tube (12) with stove.
2. the rapid detection system of a kind of boiler back end ductwork air leakage coefficient according to claim 1, it is characterized in that: described drive pipe (11) is formed by connecting by multiple drive pipe unit (13), the junction (17) between drive pipe unit (13) connects for welding or bolt; Drive pipe unit (13) length is 0.5m��3m, and external diameter is 30mm��200mm, and wall thickness is 2mm��10mm, and total length is determined according to the sectional dimension of boiler back end ductwork (1).
3. the rapid detection system of a kind of boiler back end ductwork air leakage coefficient according to claim 1; it is characterized in that: described drive pipe (11) plays protection and the effect supported; being fastened by upper cap pipe (14) and lower support pipe (15) and form, lower support pipe (15) bottom has thief hole (16).
4. the rapid detection system of a kind of boiler back end ductwork air leakage coefficient according to claim 1, it is characterized in that: be welded and fixed between described probe tube (12) and thief hole (16), probe tube (12) external diameter is 5mm��20mm, and wall thickness is 1mm��5mm.
5. the rapid detection system of a kind of boiler back end ductwork air leakage coefficient according to claim 1, it is characterised in that: the material of described drive pipe (11) and probe tube (12) is metal material.
6. the rapid detection system of a kind of boiler back end ductwork air leakage coefficient according to claim 5, it is characterised in that: described metal material is high-temperature alloy or ordinary carbon steel.
7. the rapid detection system of a kind of boiler back end ductwork air leakage coefficient according to claim 1, it is characterized in that: the flue gas of described flue gas refrigerating module (4) is cooled through water-cooled or air-cooled realization, heat-transfer surface be light pipe type, around pipe or finned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521135403.3U CN205300864U (en) | 2015-12-30 | 2015-12-30 | Boiler afterbody flue air leakage coefficient's quick detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521135403.3U CN205300864U (en) | 2015-12-30 | 2015-12-30 | Boiler afterbody flue air leakage coefficient's quick detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205300864U true CN205300864U (en) | 2016-06-08 |
Family
ID=56469129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521135403.3U Active CN205300864U (en) | 2015-12-30 | 2015-12-30 | Boiler afterbody flue air leakage coefficient's quick detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205300864U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466645A (en) * | 2015-12-30 | 2016-04-06 | 中国华能集团清洁能源技术研究院有限公司 | System and method for quickly detecting air leakage factor of boiler tail flue |
-
2015
- 2015-12-30 CN CN201521135403.3U patent/CN205300864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466645A (en) * | 2015-12-30 | 2016-04-06 | 中国华能集团清洁能源技术研究院有限公司 | System and method for quickly detecting air leakage factor of boiler tail flue |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2023087732A1 (en) | System for locating leakage position of condenser heat exchange tube, and method | |
| CN101793850B (en) | Testing device suitable for measuring constant-pressure specific heat capacity of flow fluid | |
| CN107036070A (en) | A kind of boiler leakage detects warning device | |
| CN109737898B (en) | System for realizing online test of high-temperature corrosion of water-cooled wall | |
| CN103247358A (en) | High-energy pipeline local leakage monitoring test bed for nuclear power station | |
| CN202939120U (en) | Apparatus for continuously monitoring gas species in unit with flow gas stream | |
| CN109441602B (en) | Device for accurately measuring dew point temperature of NOx sensor and measuring method thereof | |
| CN202853655U (en) | Flue gas monitoring system | |
| CN105466645A (en) | System and method for quickly detecting air leakage factor of boiler tail flue | |
| CN104655549A (en) | Low-temperature acid dew point corrosion experimental device for power station boiler flue gas | |
| CN107063734B (en) | Condenser, condenser monitoring system and condenser consumption differential analysis method | |
| CN112730519A (en) | Portable methane trace leakage quantitative detector and detection method thereof | |
| CN205300864U (en) | Boiler afterbody flue air leakage coefficient's quick detecting system | |
| CN110398399A (en) | A kind of fume extraction analytical equipment and boiler thorax combustion monitoring system | |
| CN102589824B (en) | Air leakage detection method of condenser | |
| CN203688304U (en) | Deposited ash sampling device capable of controlling surface temperature and monitoring heat flow in real time | |
| CN108844688A (en) | System and method for monitoring leakage of low-temperature heat exchanger | |
| CN102706397A (en) | Water-flow measuring device with large diameter and low pressure head and measuring method | |
| CN106680006B (en) | A kind of fission shell-and-tube exhaust-heat boiler experimental system and experimental method | |
| CN112484521A (en) | Condenser heat exchange tube leakage in-situ inspection method and device | |
| CN204831858U (en) | Flue gas monitoring system's sampling probe device | |
| CN115032123B (en) | Experimental device for research aerosol deposition characteristic in pipeline under different thermal conditions | |
| CN205448335U (en) | Biomass boiler with combustion efficiency detection device | |
| CN211825607U (en) | Low-temperature corrosion monitoring system for induced draft fan | |
| CN104776420B (en) | The boiler superheater slagging scorification diagnostic method analyzed based on vibration signal characteristics and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |