CN2837815Y - The full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device - Google Patents
The full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device Download PDFInfo
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- CN2837815Y CN2837815Y CN 200520079767 CN200520079767U CN2837815Y CN 2837815 Y CN2837815 Y CN 2837815Y CN 200520079767 CN200520079767 CN 200520079767 CN 200520079767 U CN200520079767 U CN 200520079767U CN 2837815 Y CN2837815 Y CN 2837815Y
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Abstract
The utility model discloses the full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device, comprise gas-tight silo, cantilever, outstanding rotary sampling head, gearing is arranged in the cantilever, make the rotary sampling head on the cantilever do 360 ° of rotations continuously by a jaw clutch around pulverized coal output axis, several sampling suction nozzles of distribution on the rotary sampling head have an external rotation sampling handwheel on cantilever; One end of pulverized coal output axis is equipped with and is used to control cantilever is done 90 ° of rotations towards pulverized coal channel external handle; Above gas-tight silo, be connected with second valve, tensimeter and pressure-air valve by Wien-pipe, be connected with separation vessel by Wien-pipe between second valve and the tensimeter, also have a sampling jar in the bottom of separation vessel.Device of the present utility model can be realized full section isokinetic sampling from airduct, gathers representative pulverized coal sample, and boiler economic operation is had certain meaning.Coal dust is not revealed simultaneously, can improve the working environment of coal dust sampling.
Description
Technical field
The utility model relates to the sampler of a kind of fuel-burning power plant coal-burning boiler, specifically, is the full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device.
Background technology
The fuel-burning power plant coal-burning boiler generally adopts the coal dust suspension combustion, thereby to go into the stove fineness of pulverized coal be conventional supervision project, and it need gather pulverized coal sample, with the operation conditions of supervision boiler coal-ash system.Simultaneously, fineness of pulverized coal also is an optimized combustion, improves the important parameter of boiler operatiopn economy.
For making station boiler use qualified coal dust, obtain higher combustion rate, boiler is moved under the state of safety economy, must carry out periodic monitoring fineness of pulverized coal, thereby purpose can be arranged, in a planned way control, adjust burning, realize the method for operation of boiler the best.
Because the wearing and tearing of coal pulverizer abrasive article, and the variation of coal, granularity, bigger variation will take place in fineness of pulverized coal, and directly influence the efficient of boiler combustion, therefore need regularly to fineness of pulverized coal sampling detection, when the fineness of coal dust surpasses design load, in time adjust separation vessel and be folded to an aperture, or the replacing grinding component is very necessary.
For bin storage type pulverizing system, the coal dust sampling ratio is more convenient, can carry out periodic monitoring to coal dust, and direct-firing pulverized coal system is not owing to exist Pulverized Coal Bin, system is in barotropic state, and the coal dust sampling ratio is difficulty, generally is difficult to accomplish regular sampling, and in order to determine fineness of pulverized coal, have only and from an airduct, obtain the coal dust sample and measure.Thereby how to obtain representative coal dust sample from an airduct becomes key.
Theoretically, higher when gas, powder mixture flowing velocity in the straight tube pipeline, and when fully developing, the distribution of particles of coal dust can be thought to be symmetrically distributed with the center on pipeline section in the pipeline.But in fact,, reach the friction force of tube wall, cause the situation of breeze airflow turbulent flow, eddy current in the pipeline, make coal dust generation segregation in the pipeline, destroyed this symmetry and distributed coal dust because piping erection has annexes such as elbow, valve.Thereby in the collection conduit during pulverized coal sample, should guarantee full section sampling.
And existing coal dust sampler, just along the sampling of pulverized coal channel diametric(al), rather than in the full section sampling of pipeline, thereby coal sample is representative poor.That have even adopt the mode of blowing, the poor accuracy of not only taking a sample, and be difficult to seal preferably during sampling, there is the coal dust leakage phenomenon, the sampling poor working environment, labour intensity is big.The existence of above problem can't realize isokinetic sampling truly when making sampling.Simultaneously, because the interior speed of coal pipe is higher and amount is big, can cause sampling to stop up.
Will finish an airduct coal dust sampling preferably, sampler should be able to guarantee to realize full section sampling in the pipeline under isokinetic sampling's prerequisite.Install each parts junction and should possess good integrality, make the sampling jar loading, unloading convenient, also should adopt pressurized air to purge, stop up to prevent coal dust from entering sampler inside.
Summary of the invention
Can only take a sample and the functional defect of coal sample representative difference in certain diametric(al) in order to improve existing coal fines sampling apparatus, the purpose of this utility model is to provide a kind of manually full end face isokinetic sample of pulverized coal device that is used on the unit pulverized-coal system pulverized coal channel, this device can satisfy the daily fineness of pulverized coal analytical sampling of station boiler pressurized direct pulverizing coal system requirement, utilize rotary sampling head and the two-part combination of the external tripping device of bleeding, can guarantee full section sampling in the pulverized coal channel, can guarantee that again sampling process is the isokinetic sampling simultaneously.Its sampling process is not subjected to the pulverized coal channel level or is arranged vertically the restriction of mode.
To achieve these goals, the technical solution that the utility model is taked is, the full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device, it is characterized in that, this device comprises and is fixed on the pulverized coal channel outer wall and the gas-tight silo that is communicated with pulverized coal channel, cantilever is equipped with in position near the pulverized coal channel inwall in the gas-tight silo, cantilever is provided with the rotary sampling head in pulverized coal channel, gearing is arranged in the cantilever, make the rotary sampling head on the cantilever do 360 ° of rotations continuously by a jaw clutch around pulverized coal output axis, several sampling suction nozzles of distribution on the rotary sampling head have an external rotation sampling handwheel on the relative direction of cantilever;
One end of pulverized coal output axis is equipped with and is used to control cantilever is done 90 ° of rotations towards pulverized coal channel external handle;
Above gas-tight silo, be connected with second valve, tensimeter and pressure-air valve by Wien-pipe, be connected with separation vessel by Wien-pipe between second valve and the tensimeter, also have a sampling jar in the bottom of separation vessel; Separation vessel also is connected with cantilever by first valve of installing on coal dust output pipe and the pipeline thereof.
This device can make rotary sampling head be in sampling location and reference position by external handle, and when not needing to sample, sampling head is in reference position; Move external handle during sampling, can guarantee that rotary sampling head is screwed into and pulverized coal flow direction of motion upright position, make to be installed in nozzle on the sampling head over against breeze airflow.At this moment, regulate compressed air pressure, make and form negative pressure in the sampler, to realize the isokinetic sampling; Simultaneously, rotating the sampling handwheel is that rotatable sampling head carries out full section sampling, and desirable primary mixture separates through the separation vessel of bleeding, and the pulverized coal particle that separates is desirable pulverized coal sample; After sampling was finished, the sampling handwheel that stops operating was moved external handle again, makes sampling head get back to the reference position parallel with pulverized coal channel, avoids breeze airflow, avoided the sampling head wearing and tearing.
The full section isokinetic sample of pulverized coal of pulverized coal channel of the present utility model device can be realized full section isokinetic sampling from airduct, collects representative pulverized coal sample.The operations staff analyzes and calculates the quality and the flow of coal dust to the fineness of coal dust according to the pulverized coal sample of being gathered.And with this as according to the coal dust in the airduct is next time quantitatively adjusted, and adjust the operational factor of coal pulverizer, for the boiler optimization burning provides related data accurately.Except that routine sampling as power boiler breeze, when enabling new coal pulverizer and put into operation, also can adopt this device to take a sample, test, new coal pulverizer is rationally adjusted realizing; When carrying out the burning test of new coal, by the coal dust sampling and testing, measure coal to grinding and the influence of distribution system, and then the assessment coal pulverizer is to the nonferromagnetic substance of certain coal.The utility model can thoroughly solve the full section isokinetic sampling of the coal dust problem of unit pulverized-coal system, makes desirable pulverized coal sample have more representativeness, and boiler economic operation is had certain meaning.Simultaneously can not produce the coal dust leakage phenomenon, improve the sampling working environment, reduce labor intensity of operating personnel.
Description of drawings
Fig. 1-the 1st, the utility model system layout schematic diagram;
Fig. 1-2 is the utility model system layout schematic diagram;
Fig. 2 is that Fig. 1-2 is along the C-C cross-section cutaway view.
Symbol among the figure is represented respectively: 1, rotary sampling head, 2, cantilever, 3, rotation sampling handwheel, 4, pulverized coal channel, 5, gas-tight silo, 6, external handle, 7 first valves, 8 second valves, 9, tensimeter, 10, pressure-air valve, 11, separation vessel, 12, sampling jar.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Specific embodiments
Referring to Fig. 1-1, Fig. 1-2, the full section isokinetic sample of pulverized coal of pulverized coal channel of the present utility model device, comprise and be fixed on pulverized coal channel 4 outer walls and the gas-tight silo 5 that is communicated with pulverized coal channel 4, cantilever 2 is equipped with in position near pulverized coal channel 4 inwalls in the gas-tight silo 5, cantilever 2 is provided with the rotary sampling head 1 in pulverized coal channel 4, several sampling suction nozzles distribute on the rotary sampling head 1, rotation sampling head 1 can be done 360 ° around the coal dust output shaft and rotate (Fig. 2) continuously, and an external rotation sampling handwheel 3 is arranged on the relative direction of cantilever 2; One cover gearing is installed in the cantilever 2, and will rotates the clutch end that sampling head 1 is installed in cantilever 2.The power intake of cantilever 2 is equipped with jaw clutch, also is equipped with on the coal dust output shaft on the cantilever 2 to be used to control cantilever 2 is done 90 ° of rotations towards pulverized coal channel 4 external handle 6;
Above gas-tight silo 5, be connected with between second valve 8, tensimeter 9 and pressure-air valve 10, the second valves 8 and the tensimeter 9 by Wien-pipe and be connected with separation vessel 11 by Wien-pipe, also have a sampling jar 12 in the bottom of separation vessel 11; Separation vessel 11 also is connected with cantilever 2 by first valve of installing on coal dust output pipe and the pipeline thereof 7.
This device can be installed on vertical pipe, also can be installed on the horizontal pipe.Only needing to open on a wind pipe wall eyelet welding during installation connects and gets final product.
Principle of work of the present utility model is, turning handle 6 makes cantilever 2 and sampling head 1 be in working position A or off-position B, when cantilever 2 is in working position A (vertical) with the breeze airflow of pulverized coal channel 4, the jack clutch closure, operation is installed in the external handwheel 3 outside the gas-tight silo 5, the full section that makes rotary sampling head 1 do 360 ° in pulverized coal channel 4 rotates sampling continuously, the external handwheel 3 of operation after work is finished, make jack clutch separately, rotate external handle 6 and make cantilever 2 and rotary sampling head 1 be in off-position B (promptly parallel) in the gas-tight silo 5 with the breeze airflow of pulverized coal channel 4.Gas-tight silo 5 outer coal dust output pipe and the Wien-pipes of being equipped with, first valve 7 and separation vessel 11 is housed on the coal dust output pipe, sampling jar 12 is installed in the separation vessel bottom, and top links to each other with Wien-pipe, and Wien-pipe is equipped with second valve 8, pressure-air valve 10 and tensimeter 9.When cantilever 2 and rotary sampling head 1 are in working point A, open pressure-air valve 10, second valve 8 and first valve 7, pressurized air P enters (shown in Fig. 1-1) among the pulverized coal channel 4 by Wen Luguan.In the junction generation negative pressure of separation vessel 11 with Venturi tube.At this moment the pulverized coal sample gathered of rotary sampling head 1 is by the coal dust output pipe, and after separation vessel 11 was handled, pulverized coal sample fell into sampling jar 12, and residual air is got back in the pulverized coal channel 4 through Wien-pipe.The vacuum magnitude of separation vessel 11 and Wien-pipe junction is adjusted by pressure-air valve 10, reaches coal chute road internal pressure and pulverized coal channel 4 pressure equilibriums (shown in Fig. 1-1).Symbol P among the figure represents airflow direction.
When device busy, rotary sampling head 1 is pressed the rotation sampling of the continuous 360 ° of degree of section of pulverized coal channel 4, the coal dust sample can both be got in the position that rotary sampling head is stipulated on the whole section of pulverized coal channel 4, and the coal dust sample that is extracted is collected among the sampling bottle 12 after separation vessel 11 is handled.
Compare with traditional sampler, apparatus for full-section constant velocity sampling of coal powder in coal powder pipe of the present utility model shows following technical characterstic:
1, realizes the full end face isokinetic sampling of pipeline powder coal, convenient, fast, desirable pulverized coal sample representativeness Good. Device adopts the rotary sampling head of unique design can multidraw, has only solved former sample mode Can be in the difficult problem of pulverized coal channel diametric(al) sampling and representation of coal sampling difference, its rotary sampling head can The requirement of full end face multidraw is satisfied in the continuous rotation sampling in the pulverized coal channel, and the representation of coal sampling of getting is good.
2, adopt compressed air to carry out air suction sampling, after the sampling beginning and finishing, utilize compressed air Purge, avoided sampling pipe and static tube to stop up.
3, adopt the movable device that is installed on the pulverized coal channel, when not working, the rotation sampling head can be rolled over Get back to gas-tight silo, avoided the wearing and tearing of primary wind and powder stream to rotary sampling head.
4, in sampling process, the weary gas of primary mixture after separator separates is not directly to arrange sentence Atmosphere, but be sent back in the primary air inlet, eliminated the on-the-spot environmental pollution of taking a sample.
5, sampling bottle adopts stainless steel, adopts with being connected of separator outlet and presses the embedding sealing, picks and places The sample bottle is more convenient.
6, mounting arrangements is flexible, can install at vertical pipe, also can be installed on the horizontal pipe. Peace Only needing to open an eyelet welding at wind pipe wall during dress connects and gets final product.
Claims (4)
1. the full section isokinetic sample of pulverized coal of pulverized coal channel device, it is characterized in that, this device comprises and is fixed on pulverized coal channel (4) outer wall and the gas-tight silo (5) that is communicated with pulverized coal channel (4), cantilever (2) is equipped with in position near pulverized coal channel (4) inwall in the gas-tight silo (5), cantilever (2) is provided with the rotary sampling head (1) in pulverized coal channel (4), cantilever has gearing in (2), make the rotary sampling head (1) on the cantilever (2) do 360 ° of rotations continuously by a jaw clutch around pulverized coal output axis, rotary sampling head (1) is gone up several sampling suction nozzles that distribute, and an external rotation sampling handwheel (3) is arranged on the relative direction of cantilever (2);
One end of pulverized coal output axis is equipped with and is used to control cantilever (2) is done 90 ° of rotations towards pulverized coal channel (4) external handle (6);
Top in gas-tight silo (5), be connected with second valve (8), tensimeter (9) and pressure-air valve (10) by Wien-pipe, be connected with separation vessel (11) by Wien-pipe between second valve (8) and the tensimeter (9), also have a sampling jar (12) in the bottom of separation vessel (11); Separation vessel (11) also is connected with cantilever (2) by first valve of installing on coal dust output pipe and the pipeline thereof (7).
2. the full section isokinetic sample of pulverized coal of pulverized coal channel as claimed in claim 1 device is characterized in that, described rotary sampling head (1) faces the breeze airflow in the pulverized coal channel (4).
3. the full section isokinetic sample of pulverized coal of pulverized coal channel as claimed in claim 1 device is characterized in that described external handle (6) is used to control cantilever (2) and rotary sampling head (1) is in working position or off-position.
4. the full section isokinetic sample of pulverized coal of pulverized coal channel as claimed in claim 1 device is characterized in that the material of described sampling jar (12) is selected stainless steel for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079767 CN2837815Y (en) | 2005-11-25 | 2005-11-25 | The full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520079767 CN2837815Y (en) | 2005-11-25 | 2005-11-25 | The full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device |
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| CN2837815Y true CN2837815Y (en) | 2006-11-15 |
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| CN 200520079767 Expired - Fee Related CN2837815Y (en) | 2005-11-25 | 2005-11-25 | The full section isokinetic sample of pulverized coal of a kind of pulverized coal channel device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230855A (en) * | 2011-04-08 | 2011-11-02 | 中国石油大学(北京) | Dust off-line sampling system in open-loop high-pressure natural gas pipeline and sampling method thereof |
| CN107063948A (en) * | 2017-07-01 | 2017-08-18 | 孙大欣 | A kind of full automatic pulverized coal sampling analysis instrument |
| CN107677517A (en) * | 2017-11-08 | 2018-02-09 | 上海北分科技股份有限公司 | A kind of cross-sectional scans formula flue dust, flue gas sampler |
| CN110763525A (en) * | 2019-10-16 | 2020-02-07 | 华电电力科学研究院有限公司 | Rotary fly ash sampling device and sampling method for coal-fired power plant |
-
2005
- 2005-11-25 CN CN 200520079767 patent/CN2837815Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230855A (en) * | 2011-04-08 | 2011-11-02 | 中国石油大学(北京) | Dust off-line sampling system in open-loop high-pressure natural gas pipeline and sampling method thereof |
| CN107063948A (en) * | 2017-07-01 | 2017-08-18 | 孙大欣 | A kind of full automatic pulverized coal sampling analysis instrument |
| CN107677517A (en) * | 2017-11-08 | 2018-02-09 | 上海北分科技股份有限公司 | A kind of cross-sectional scans formula flue dust, flue gas sampler |
| CN110763525A (en) * | 2019-10-16 | 2020-02-07 | 华电电力科学研究院有限公司 | Rotary fly ash sampling device and sampling method for coal-fired power plant |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061115 Termination date: 20101125 |