CN206990271U - A kind of automatic coal dust sampling system of boiler - Google Patents
A kind of automatic coal dust sampling system of boiler Download PDFInfo
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- CN206990271U CN206990271U CN201720943305.5U CN201720943305U CN206990271U CN 206990271 U CN206990271 U CN 206990271U CN 201720943305 U CN201720943305 U CN 201720943305U CN 206990271 U CN206990271 U CN 206990271U
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Abstract
The utility model provides a kind of automatic coal dust sampling system of boiler, including powder feeding pipes, sampling system, purging system, pressure regulating system；The automatic coal fines sampling apparatus of boiler carries out air suction sampling using compressed air, and automatic blowing system pipeline, avoids sampler from blocking before and after sampling；It is more representative according to grade annulus area-method continuous sampling, sample in pipeline sampling section using electric speed regulation executing agency；From differential pressure transmitter, sample rate is automatically adjusted, really realizes isokinetic sampling, sampling result is truly, accurately；One key operation, realize fully automated sampling.
Description
Technical field
It the utility model is related to a kind of automatic coal dust sampling system of boiler.
Background technology
Fineness of pulverized coal is the index strictly controlled in power plant boiler operation, and optimization is burnt, raising boiler fortune
The important parameter of row economy.To make the qualified coal dust of boilers of power plants, higher efficiency of combustion is obtained, is pacifying boiler
Entirely, run in the state of economy, it is necessary to which periodic monitoring is carried out to fineness of pulverized coal.Qian Dong power plant 2 × 600MW units share 12 Shen
Live again the BBD4360 type ball mills of production, it is configured to the formula of going with each other all the time.Corresponding 2 separators of every grinding machine, on every separator
End be provided with 3 pulverized coal channels, coal fines sampling apparatus is installed on pulverized coal channel, show sampler be compressed air be power etc.
Fast sampler.Coal fines sampling apparatus subject matter is that sample representation is poor at present, is being not isolated device and pulverized coal preparation system adjustment
In the case of, the result value difference of more sub-samplings is very big, it is impossible to effectively reacts the truth of the coal dust of pulverized coal preparation system, no
The adjustment of pulverized coal preparation system and boiler combustion can be correctly instructed, influences boiler efficiency；Meanwhile existing coal powder sampler needs to use
For compressed air as power, the gas of cyclonic separation form, powder low separation efficiency are the main reason for causing sample representation difference.
The problem of current coal fines sampling apparatus is present has：
1. manual sampler relies on manual operation, vary with each individual, operate randomness greatly, result in the sampling stroke of sampling gun
It cannot be guaranteed that；
2. artificial observation pointer pressure can only be relied on to carry out the setting of suction pressure, the setting blindness of suction pressure
Greatly；The setting poor accuracy of suction pressure；Suction pressure can not be adjusted in real time according to the situation of change of pulverized coal channel pressure
It is whole, isokinetic sampling truly can not be realized；
3. because manual operation can not exit withdrawal probe tube, probe tube washes away in tube cell for a long time, serious wear；
4. the accuracy sampled manually, representativeness are poor with comparison of coherence, can not be strictly in accordance with power testing sampling code
The requirement for waiting annulus area, isokinetic sampling of middle requirement, so that sampling result loses due meaning；
5. not having the remaining coal dust in timely cleaning equipment after sampling, these coal dusts are combined shape with the vapor in air
Into lump, whole pipeline is progressively blocked.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of automatic coal dust sampling system of boiler.
The utility model is achieved by the following technical programs.
The automatic coal dust sampling system of a kind of boiler provided by the utility model, including powder feeding pipes, sampling system, purging system
System, pressure regulating system；The sampling system includes separator, sampling bottle, displacement mechanism, sampling gun, the sampling gun installation
On displacement mechanism, the sampling gun is connected by pipeline with separator, and the lower end of separator is provided with sampling bottle；The purging
System includes compressed air source, scavenging conduit, and compressed air source is connected by magnetic valve with each branch pipe, wherein a branch pipe and purging
Pipe connects；The pressure regulating system includes static pressure in blast pipe, regulating valve, duct static pressure, rifle, and the duct static pressure is arranged on
On the pressure-measuring pipe of powder feeding pipes side, static pressure is arranged in sampling gun in the rifle, and the blast pipe passes through regulating valve and compression
Air-source connects.
Static pressure is connected by differential pressure transmitter with controller in the duct static pressure and rifle.
The separator is connected by magnetic valve with compressed air source.
Connected between the blast pipe and separator by ball valve.
The magnetic valve, ball valve, regulating valve are connected with controller.
Displacement transducer is additionally provided with institute's displacement mechanism.
The beneficial effects of the utility model are：The automatic coal fines sampling apparatus of boiler carries out pumping using compressed air and taken
Sample, automatic blowing system pipeline, avoids sampler from blocking before and after sampling；Using electric speed regulation executing agency, cut in pipeline sampling
It is more representative according to grade annulus area-method continuous sampling, sample in face；From differential pressure transmitter, sampling speed is automatically adjusted
Degree, isokinetic sampling is really realized, sampling result is truly, accurately；One key operation, realize fully automated sampling.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
In figure：1- powder feeding pipes, 2- controllers, 3- separators, 4- sampling bottles, 5- displacement mechanisms, 6- sampling guns, 7- lack of gas
Pipe, 8- pressure-measuring pipes, 9- displacement transducers, 10- differential pressure transmitters, 11- magnetic valves, 12- compressed air sources, 13- ball valves, 14- are adjusted
Save valve, 15- scavenging conduits, P1- duct static pressures, static pressure in P2- rifles.
Embodiment
Be described further below the technical solution of the utility model, but claimed scope be not limited to it is described.
A kind of automatic coal dust sampling system of boiler, including powder feeding pipes 1, sampling system, purging system, pressure regulation system
System；The sampling system includes separator 3, sampling bottle 4, displacement mechanism 5, sampling gun 6, and the sampling gun 6 is arranged on displacement machine
On structure 5, the sampling gun 6 is connected by pipeline with separator 3, and the lower end of separator 3 is provided with sampling bottle 4；The purging system
System includes compressed air source 12, scavenging conduit 15, and compressed air source 12 is connected by magnetic valve 11 with each branch pipe, wherein a branch pipe
It is connected with scavenging conduit 15；The pressure regulating system includes static pressure P2 in blast pipe 7, regulating valve 14, duct static pressure P1, rifle, institute
Duct static pressure P1 is stated on the pressure-measuring pipe 8 of the side of powder feeding pipes 1, static pressure P2 is arranged in sampling gun 6 in the rifle, described
Blast pipe 7 is connected by regulating valve 14 with compressed air source 12.
Static pressure P2 is connected by differential pressure transmitter 10 with controller 2 in the duct static pressure P1 and rifle.
The separator 3 is connected by magnetic valve 11 with compressed air source 12.
Connected between the blast pipe 7 and separator 3 by ball valve 13.
The magnetic valve 11, ball valve 13, regulating valve 14 are connected with controller 2.
Displacement transducer 9 is additionally provided with institute's displacement mechanism 5.
The course of work of the present utility model is that, according to isokinetic sampling's principle, sampling gun is under the drive of electric operator
Whole diameter through pulverized coal channel sampling section, run continuous samples according to annulus area-method is waited.Meanwhile coal dust is measured in real time
The static pressure P1 of pipeline interior air-flow, the static pressure P2 with sampling air-flow in sampling gun, P1, P2 are carried out by controlled system with self-regulation
Compare.When P1, P2 static pressure difference exceed ± 10Pa, the charge flow rate of negative pressure generator is adjusted by regulating valve, so as to change P2
Pressure, it is ensured that pressure P2 in the sampling gun and pressure P1 in pulverized coal channel static pressure difference realizes constant speed within ± 10Pa
Sampling.After wind powder mixture enters sampler, realize that wind powder mixture is automatically separated by cyclone separator, coal dust stays in
In sampling bottle, lack of gas flow back to primary air piping by blast pipe, reuse compressed air and enter line program purging, automatically retract sampling
Rifle, effectively improve the service life of sampling gun.
Claims (6)
1. a kind of automatic coal dust sampling system of boiler, including powder feeding pipes (1), sampling system, purging system, pressure regulation system
System, it is characterised in that：The sampling system includes separator (3), sampling bottle (4), displacement mechanism (5), sampling gun (6), described
Sampling gun (6) is arranged on displacement mechanism (5), and the sampling gun (6) is connected by pipeline with separator (3), separator (3)
Lower end is provided with sampling bottle (4)；The purging system includes compressed air source (12), scavenging conduit (15), compressed air source (12)
It is connected by magnetic valve (11) with each branch pipe, wherein a branch pipe is connected with scavenging conduit (15)；The pressure regulating system includes
Blast pipe (7), regulating valve (14), duct static pressure (P1), static pressure (P2) in rifle, the duct static pressure (P1) are arranged on powder feeding pipes
(1) on the pressure-measuring pipe (8) of side, static pressure (P2) is arranged in sampling gun (6) in the rifle, and the blast pipe (7) passes through regulation
Valve (14) is connected with compressed air source (12).
2. the automatic coal dust sampling system of boiler as claimed in claim 1, it is characterised in that：In the duct static pressure (P1) and rifle
Static pressure (P2) is connected by differential pressure transmitter (10) with controller (2).
3. the automatic coal dust sampling system of boiler as claimed in claim 1, it is characterised in that：The separator (3) passes through electromagnetism
Valve (11) is connected with compressed air source (12).
4. the automatic coal dust sampling system of boiler as claimed in claim 1, it is characterised in that：The blast pipe (7) and separator
(3) connected between by ball valve (13).
5. the automatic coal dust sampling system of boiler as claimed in claim 1, it is characterised in that：The magnetic valve (11), ball valve
(13), regulating valve (14) is connected with controller (2).
6. the automatic coal dust sampling system of boiler as claimed in claim 1, it is characterised in that：The upper of institute's displacement mechanism (5) is gone back
It is provided with displacement transducer (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720943305.5U CN206990271U (en) | 2017-07-31 | 2017-07-31 | A kind of automatic coal dust sampling system of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720943305.5U CN206990271U (en) | 2017-07-31 | 2017-07-31 | A kind of automatic coal dust sampling system of boiler |
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| Publication Number | Publication Date |
|---|---|
| CN206990271U true CN206990271U (en) | 2018-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720943305.5U Active CN206990271U (en) | 2017-07-31 | 2017-07-31 | A kind of automatic coal dust sampling system of boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459277A (en) * | 2018-11-22 | 2019-03-12 | 国网浙江省电力有限公司电力科学研究院 | Constant speed control cabinet and its application method applied to portable coal powder sampler |
| CN112629957A (en) * | 2020-11-30 | 2021-04-09 | 南京波瑞自动化科技有限公司 | Constant-speed sampling device of static pressure balance method |
| CN114988121A (en) * | 2022-06-16 | 2022-09-02 | 央信环保集团有限公司 | Automatic sampling and weighing system for gas-powder mixing pipeline |
-
2017
- 2017-07-31 CN CN201720943305.5U patent/CN206990271U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459277A (en) * | 2018-11-22 | 2019-03-12 | 国网浙江省电力有限公司电力科学研究院 | Constant speed control cabinet and its application method applied to portable coal powder sampler |
| CN109459277B (en) * | 2018-11-22 | 2024-04-05 | 国网浙江省电力有限公司电力科学研究院 | Constant-speed control box applied to portable coal dust sampling device and application method of constant-speed control box |
| CN112629957A (en) * | 2020-11-30 | 2021-04-09 | 南京波瑞自动化科技有限公司 | Constant-speed sampling device of static pressure balance method |
| CN114988121A (en) * | 2022-06-16 | 2022-09-02 | 央信环保集团有限公司 | Automatic sampling and weighing system for gas-powder mixing pipeline |
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