CN219714835U - Dust hopper detection device - Google Patents
Dust hopper detection device Download PDFInfo
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- CN219714835U CN219714835U CN202220787445.9U CN202220787445U CN219714835U CN 219714835 U CN219714835 U CN 219714835U CN 202220787445 U CN202220787445 U CN 202220787445U CN 219714835 U CN219714835 U CN 219714835U
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- sampling
- ash bucket
- purging
- valve
- dust
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- 239000000428 dust Substances 0.000 title claims abstract description 85
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 201
- 238000010926 purge Methods 0.000 claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000011010 flushing procedure Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000005251 gamma ray Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Abstract
The utility model provides a dust hopper detection device, which comprises at least one group of upper sampling devices and at least one group of lower sampling devices positioned below the upper sampling devices; the upper sampling device and the lower sampling device comprise sampling pipes, one end of each sampling pipe penetrates through the side wall of the ash bucket and is communicated with the inner cavity of the ash bucket, the other end of each sampling pipe is connected with a pressure measuring device and a purging air source in parallel, a sampling valve is arranged between the pressure measuring device and the sampling pipe, and a purging valve is arranged between the purging air source and the sampling pipe; the device also comprises a level gauge positioned outside the ash bucket. The utility model has the advantages of accurately measuring the blanking condition in the ash bucket, the material distribution state in the ash bucket and the material hanging state on the inner wall, being convenient for the rear end to give reasonable blanking and purging periods in combination with the actual material condition, avoiding unnecessary blanking and purging, saving purging air sources, reducing the starting number of the air compressor, reducing the action times of the blanking valve and the flushing times of the ash conveying pipeline, reducing the loss, prolonging the service life, saving energy and reducing consumption.
Description
Technical Field
The utility model relates to the field of dust removing equipment, in particular to a dust hopper detection device.
Background
In a dedusting and ash conveying system of a thermal power plant, the inner wall of an ash bucket for collecting dust is easy to hang, and meanwhile, the actual material level is difficult to accurately measure due to the fact that the specific distribution position of the materials in the ash bucket cannot be determined; when the ash bucket works, the temperature in the ash bucket is higher and can reach 120 ℃ or even 130 ℃, the annual working condition is in the process of ash dropping, scouring and wearing, and the charge level indicator arranged in the ash bucket can generate unavoidable wearing along with the time, so that the function is damaged; in the running process of the unit, the bin level gauge cannot be overhauled and maintained under the state of no shutdown because of high temperature and ash in the ash bucket; in addition, the dust falling hole below the dust hopper is blocked due to reasons such as accumulation and hardening, so that the dust falling is unsmooth, effective monitoring cannot be performed, and accidents such as collapse of the dust hopper and even the whole dust removal system can be caused seriously under special working conditions.
Disclosure of Invention
Based on the problems, the utility model aims to provide the dust and ash bucket detection device which can accurately measure the blanking condition in the dust and ash bucket, the material distribution state in the dust and ash bucket and the material hanging state on the inner wall, is convenient for the rear end to give reasonable blanking and purging periods in combination with the actual material condition, avoids unnecessary blanking and purging, saves purging air sources, reduces the starting quantity of an air compressor, reduces the action times of a blanking valve and the flushing times of an ash conveying pipeline, reduces the loss, prolongs the service life, saves energy and reduces consumption.
Aiming at the problems, the following technical scheme is provided: a dust hopper detection device comprises at least one group of upper sampling devices and at least one group of lower sampling devices positioned below the upper sampling devices; the upper sampling device and the lower sampling device comprise sampling pipes, one end of each sampling pipe penetrates through the side wall of the ash bucket and is communicated with the inner cavity of the ash bucket, the other end of each sampling pipe is connected with a pressure measuring device and a purging air source in parallel, a sampling valve is arranged between the pressure measuring device and the sampling pipe, and a purging valve is arranged between the purging air source and the sampling pipe; the device also comprises a level gauge positioned outside the ash bucket.
In the structure, the material level in the ash bucket is detected through the externally-mounted material level meter, but the dust in the ash bucket has the working condition that lateral wall hanging ash and hardening cause uneven distribution, the ash level measured by the externally-mounted material level meter is a material level value which is folded into even distribution of the dust, and belongs to a relative value, and the actual distribution condition of the dust in the ash bucket cannot be truly reflected, so that when the externally-mounted material level meter detects that the dust in the ash bucket is in a non-high position, an upper sampling device and a lower sampling device are required to be introduced for cross measurement so as to determine the actual distribution condition of the dust in the ash bucket; because the inside of the ash bucket is connected with the induced draft fan, the dust-free position of the inner wall of the ash bucket is always in a negative pressure state, when sampling valves of the upper sampling device and the lower sampling device are opened, the measuring values of the pressure measuring devices of the upper sampling device and the lower sampling device aiming at the located sampling points are close to the negative pressure value of the induced draft fan; when dust exists at the sampling point, the sampling tube is covered by the dust, and the measured value of the pressure measuring device is close to zero; the sampling tube is connected with a purging air source, purging of the sampling tube can be realized through the purging valve, when the pressure of the sampling point is close to zero, the sampling valve corresponding to the sampling point is closed, the purging valve is opened, the sampling tube is purged by the purging air source (namely, gas is blown into the ash bucket through the sampling tube), the purging valve is closed and the sampling valve is opened after a certain time delay, the sampling point is put into measurement again (the purging can be performed manually at any time according to the actual working condition), and if the sampling point is still zero after purging, dust or inner wall dust deposit or hardening is considered to exist on the side wall of the ash bucket of the sampling point; the dust distribution in the dust hopper is conveniently analyzed through the analysis platform, and the dust distribution is accurately displayed on the display for overhaul or monitoring by operating personnel.
The utility model is further characterized in that a filter is arranged at one end of the sampling tube, which faces the inner cavity of the ash bucket, and a check valve is arranged in the sampling tube behind the filter, and the check valve is communicated with the inner cavity of the ash bucket.
In the structure, because the dust has fluidity, the sampling tube is easy to block and influence the measurement result, and a filter and a check valve are arranged at one end of the sampling tube, which is positioned in the inner cavity of the ash bucket, so that the sampling tube is prevented from being blocked; the filter can be cleaned at the same time of purging.
The utility model is further arranged that the sampling tube is inclined downwards towards one end of the inner cavity of the ash bucket.
In the structure, dust can be further prevented from entering the sampling tube to cause blockage of the sampling tube.
The utility model is further arranged that when the number of the upper sampling devices is two or more, the sampling tubes of the upper sampling devices are positioned at one end of the inner cavity of the ash bucket on the same horizontal plane and are uniformly distributed along the circumferential direction of the side wall of the ash bucket; when the lower sampling devices are two groups or more, one end of each sampling tube of each lower sampling device is positioned on the same horizontal plane and uniformly distributed along the circumferential direction of the side wall of the ash bucket.
In the structure, the upper sampling device and the lower sampling device are respectively arranged into three groups, four groups, five groups or more than six groups; the upper sampling device and the lower sampling device are preferably four groups, so that the upper sampling device and the lower sampling device of each group can conveniently detect dust distribution conditions within a range of 90 degrees in the circumferential direction of the dust hopper.
The utility model is further arranged such that the up-sampling devices and the down-sampling devices are equal in number and correspond one-to-one to each other in the circumferential direction of the side wall of the hopper.
In the structure, each group of upper and lower sampling devices which are in one-to-one correspondence can detect the dust distribution condition in the height direction of the ash bucket.
The utility model further provides that the level gauge is a radiation level gauge.
In the structure, the ray level gauge is a gamma ray level gauge, and is a gauge for measuring the level by utilizing the blocking effect of materials on gamma rays; the gamma-ray level gauge is particularly suitable for measuring the level under severe conditions such as high temperature, high pressure, high corrosion, high viscosity and the like, and the measured substance can be powder or granular solid or liquid; because of the non-contact characteristic, the adaptable extreme parameters such as bin pressure, material temperature value, dust condition, viscosity, corrosiveness and the like are very high, and the adaptability to temperature, pressure, dust, viscosity and corrosion can be the most excellent level meter.
The utility model further provides that the sampling valve and the purging valve are all electromagnetic valves.
In the structure, the remote control is convenient for opening and closing.
The utility model further provides that the sampling valve and the purge valve are alternatively opened.
In the structure, when the externally-mounted material level gauge detects that the material level in the ash bucket is in a high position (namely, in a non-blanking ash conveying state), the sampling valve and the purging valve are in a closed state; when the bin level in the ash bin is detected to be in a non-high position by the bin level indicator arranged outside the ash bin after blanking and ash conveying, the sampling valve and the purging valve are alternatively opened for sampling and purging so as to diagnose the dust distribution condition of the sampling point.
The utility model has the beneficial effects that: the method is characterized in that the material level in the ash bucket is detected through an externally-mounted material level meter, but dust in the ash bucket is in a working condition that lateral wall ash is hung and hardened to cause uneven distribution, and the ash level measured by the externally-mounted material level meter is a material level value which is folded into even distribution of the dust and belongs to a relative value, so that the actual distribution condition of the dust in the ash bucket cannot be truly reflected, and when the externally-mounted material level meter detects that the dust in the ash bucket is in a non-high position, an upper sampling device and a lower sampling device are required to be introduced to carry out cross measurement so as to determine the actual distribution condition of the dust in the ash bucket; because the inside of the ash bucket is connected with the induced draft fan, the dust-free position of the inner wall of the ash bucket is always in a negative pressure state, when sampling valves of the upper sampling device and the lower sampling device are opened, the measuring values of the pressure measuring devices of the upper sampling device and the lower sampling device aiming at the located sampling points are close to the negative pressure value of the induced draft fan; when dust exists at the sampling point, the sampling tube is covered by the dust, and the measured value of the pressure measuring device is close to zero; the sampling tube is connected with a purging air source, purging of the sampling tube can be realized through the purging valve, when the pressure of the sampling point is close to zero, the sampling valve corresponding to the sampling point is closed, the purging valve is opened, the sampling tube is purged by the purging air source (namely, gas is blown into the ash bucket through the sampling tube), the purging valve is closed and the sampling valve is opened after a certain time delay, the sampling point is put into measurement again (the purging can be performed manually at any time according to the actual working condition), and if the sampling point is still zero after purging, dust or inner wall dust deposit or hardening is considered to exist on the side wall of the ash bucket of the sampling point; the device is convenient to analyze through a big data platform, analyze the material distribution inside the ash bucket, monitor the inner wall for ash hanging hardening and monitor the blockage of the ash falling port, provide reasonable blanking and purging periods, realize energy-saving intelligent ash conveying, accurately display on a display, monitor by overhauling or operating personnel and prevent the collapse accident of the ash bucket and even a dust removing system.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is an enlarged schematic view of the portion a of fig. 1 according to the present utility model.
The meaning of the reference numerals in the figures: 1-up sampling means; 2-downsampling means; 10-sampling tube; 101-a filter; 102-check valve; 11-a pressure measuring device; 111-sampling valve; 12-a purge gas source; 121-a purge valve; 13-a charge level indicator; a-ash bucket; b-ash falling port.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
Referring to fig. 1 and 2, a dust hopper detection device as shown in fig. 1 and 2 includes at least one set of up-sampling devices 1 and at least one set of down-sampling devices 2 located below the up-sampling devices; the upper sampling device 1 and the lower sampling device 2 respectively comprise a sampling tube 10, one end of the sampling tube 10 penetrates through the side wall of the ash bucket a and is communicated with the inner cavity of the ash bucket a, the other end of the sampling tube 10 is connected with a pressure measuring device 11 and a purging air source 12 in parallel, a sampling valve 111 is arranged between the pressure measuring device 11 and the sampling tube 10, and a purging valve 121 is arranged between the purging air source 12 and the sampling tube 10; and a level gauge 13 positioned outside the ash bucket a.
In the above structure, the external charge level indicator 13 is used for detecting the charge level in the ash bucket a, but the dust in the ash bucket a has the working condition that the lateral wall hanging ash and hardening cause uneven distribution, and the ash level measured by the external charge level indicator 13 is a charge level value which is folded into the even distribution of the ash dust and belongs to a relative value, and the actual distribution situation of the dust in the ash bucket a can not be truly reflected, so that when the external charge level indicator 13 detects that the dust in the ash bucket a is in a non-high position, the upper sampling device 1 and the lower sampling device 2 are required to be introduced for cross measurement to determine the actual distribution situation of the dust in the ash bucket a; because the inside of the ash bucket a is connected with an induced draft fan (not shown in the figure), the dust-free position of the inner wall of the ash bucket a is always in a negative pressure state, when the sampling valves 111 of the upper sampling device 1 and the lower sampling device 2 are opened, the measurement values of the sampling points of the upper sampling device 1 and the lower sampling device 2 are close to the negative pressure value of the induced draft fan; when dust exists at the sampling point, the sampling tube 10 is covered by the dust, and the measured value of the pressure measuring device 11 is close to zero; the sampling tube 10 is connected with the purging air source 12, purging of the sampling tube 10 can be realized through the purging valve 121, when the pressure of the sampling point is close to zero, the sampling valve 111 corresponding to the sampling point is closed, the purging valve 121 is opened, the purging air source 12 purges the sampling tube 10 (namely, gas is blown into the ash bucket a through the sampling tube 10), the purging valve 121 is closed and the sampling valve 111 is opened after a certain time delay, the sampling point is put into measurement again (the purging can be carried out manually at any time according to the actual working condition), and if the sampling point is still zero after purging, dust or inner wall dust accumulation or hardening is considered to exist on the side wall of the ash bucket a of the sampling point; the dust distribution in the dust hopper a is conveniently analyzed through the analysis platform, and the dust distribution is accurately displayed on a display for overhaul or monitoring by operating personnel.
In this embodiment, a filter 101 is disposed at one end of the sampling tube 10 facing the inner cavity of the ash bucket a, a check valve 102 is disposed in the sampling tube 10 behind the filter 101, and the check valve 102 is conducted in the direction of the inner cavity of the ash bucket a.
In the above structure, since the sampling tube 10 is easily blocked to affect the measurement result due to the fluidity of dust, the filter 101 and the check valve 102 are disposed at one end of the sampling tube 10 located in the inner cavity of the ash bucket a to prevent the blockage; the filter 101 may also be cleaned at the same time as purging.
In this embodiment, the sampling tube 10 is inclined downward (not shown) toward one end of the interior of the hopper a.
In the above structure, dust can be further prevented from entering the sampling tube 10 to cause clogging thereof.
In this embodiment, when the number of the up-sampling devices 1 is two or more, the sampling tubes 10 of each up-sampling device 1 are located at one end of the inner cavity of the ash bucket a on the same horizontal plane and are uniformly distributed along the circumferential direction of the side wall of the ash bucket a; when the number of the lower sampling devices 2 is two or more, one end of the sampling tube 10 of each lower sampling device 2, which is positioned in the inner cavity of the ash bucket a, is positioned on the same horizontal plane and is uniformly distributed along the circumferential direction of the side wall of the ash bucket a.
In the above structure, the upper sampling device 1 and the lower sampling device 2 are all arranged into three groups, four groups, five groups or more than six groups; the upper sampling device 1 and the lower sampling device 2 are preferably four groups, so that each group of the upper sampling device 1 and the lower sampling device 2 can conveniently detect dust distribution conditions within the range of 90 degrees in the circumferential direction of the dust hopper a.
In this embodiment, the up-sampling devices 1 and the down-sampling devices 2 are equal in number and correspond to each other one-to-one in the circumferential direction of the side wall of the hopper a.
In the above structure, each group of the up-sampling device 1 and the down-sampling device 2 which are in one-to-one correspondence can detect the dust distribution condition in the height direction of the dust hopper a.
In this embodiment, the level gauge 13 is a radiation level gauge.
In the structure, the ray level gauge is a gamma ray level gauge, and is a gauge for measuring the level by utilizing the blocking effect of materials on gamma rays; the gamma-ray level gauge is particularly suitable for measuring the level under severe conditions such as high temperature, high pressure, high corrosion, high viscosity and the like, and the measured substance can be powder or granular solid or liquid; because of the non-contact characteristic, the adaptable extreme parameters such as bin pressure, material temperature value, dust condition, viscosity, corrosiveness and the like are very high, and the adaptability to temperature, pressure, dust, viscosity and corrosion can be the most excellent level meter.
In this embodiment, the sampling valve 111 and the purge valve 121 are both solenoid valves.
In the structure, the remote control is convenient for opening and closing.
In this embodiment, the sampling valve 111 and the purge valve 121 are alternatively opened.
In the above structure, when the external level gauge 13 detects that the level in the ash bucket a is at a high level (i.e. in a non-blanking ash conveying state), the sampling valve 111 and the purge valve 121 are both in a closed state; when the bin level in the bin a is detected to be in a non-high position by the bin level gauge 13 arranged outside the bin a after blanking and ash conveying, the sampling valve 111 and the purging valve 121 are alternatively opened for sampling and purging so as to diagnose the dust distribution condition of the sampling point.
The utility model has the beneficial effects that: the external charge level indicator 13 is used for detecting the charge level in the ash bucket a, but the dust in the ash bucket a has the working condition that the lateral wall is hung with ash and hardened to cause uneven distribution, and the ash level measured by the external charge level indicator 13 is a charge level value which is converted into the even distribution of the ash dust and belongs to a relative value, so that the actual distribution condition of the dust in the ash bucket a can not be truly reflected, and therefore, when the external charge level indicator 13 detects that the dust in the ash bucket a is in a non-high position, the upper sampling device 1 and the lower sampling device 2 are required to be introduced for cross measurement to determine the actual distribution condition of the dust in the ash bucket a; because the inside of the ash bucket a is connected with an induced draft fan (not shown in the figure), the dust-free position of the inner wall of the ash bucket a is always in a negative pressure state, when the sampling valves 111 of the upper sampling device 1 and the lower sampling device 2 are opened, the measurement values of the sampling points of the upper sampling device 1 and the lower sampling device 2 are close to the negative pressure value of the induced draft fan; when dust exists at the sampling point, the sampling tube 10 is covered by the dust, and the measured value of the pressure measuring device 11 is close to zero; the sampling tube 10 is connected with the purging air source 12, purging of the sampling tube 10 can be realized through the purging valve 121, when the pressure of the sampling point is close to zero, the sampling valve 111 corresponding to the sampling point is closed, the purging valve 121 is opened, the purging air source 12 purges the sampling tube 10 (namely, gas is blown into the ash bucket a through the sampling tube 10), the purging valve 121 is closed and the sampling valve 111 is opened after a certain time delay, the sampling point is put into measurement again (the purging can be carried out manually at any time according to the actual working condition), and if the sampling point is still zero after purging, dust or inner wall dust accumulation or hardening is considered to exist on the side wall of the ash bucket a of the sampling point; the device is convenient to analyze through a big data platform, analyze the material distribution in the ash bucket a, monitor the inner wall for ash hanging hardening, monitor whether the ash falling port b is blocked, provide reasonable blanking and purging periods, realize energy-saving intelligent ash conveying, accurately display on a display, monitor by overhauling or operating personnel and prevent the ash bucket a and even a dust removing system from collapsing.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (8)
1. The utility model provides a dust hopper detection device which characterized in that: comprises at least one group of up-sampling devices and at least one group of down-sampling devices positioned below the up-sampling devices; the upper sampling device and the lower sampling device comprise sampling pipes, one end of each sampling pipe penetrates through the side wall of the ash bucket and is communicated with the inner cavity of the ash bucket, the other end of each sampling pipe is connected with a pressure measuring device and a purging air source in parallel, a sampling valve is arranged between the pressure measuring device and the sampling pipe, and a purging valve is arranged between the purging air source and the sampling pipe; the device also comprises a level gauge positioned outside the ash bucket.
2. The dust hopper detection device of claim 1, wherein: the one end that the sampling tube faced the ash bucket inner chamber is equipped with the filter, be equipped with the check valve in the sampling tube at filter rear, the check valve is to ash bucket inner chamber direction for switching on.
3. A dust hopper detection apparatus as claimed in claim 1 or claim 2, wherein: the sampling tube is inclined downwards towards one end of the inner cavity of the ash bucket.
4. The dust hopper detection device of claim 1, wherein: when the number of the upper sampling devices is two or more, one end of each sampling tube of each upper sampling device, which is positioned in the inner cavity of the ash bucket, is positioned on the same horizontal plane and is uniformly distributed along the circumferential direction of the side wall of the ash bucket; when the lower sampling devices are two groups or more, one end of each sampling tube of each lower sampling device is positioned on the same horizontal plane and uniformly distributed along the circumferential direction of the side wall of the ash bucket.
5. A dust hopper detection apparatus as claimed in claim 1 or 4, wherein: the upper sampling devices and the lower sampling devices are equal in number and correspond to each other one-to-one in the circumferential direction of the side wall of the ash bucket.
6. The dust hopper detection device of claim 1, wherein: the material level gauge is a ray material level gauge.
7. The dust hopper detection device of claim 1, wherein: the sampling valve and the purging valve are electromagnetic valves.
8. The dust hopper detection device of claim 1, wherein: the sampling valve and the purging valve are alternatively opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220787445.9U CN219714835U (en) | 2022-04-06 | 2022-04-06 | Dust hopper detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220787445.9U CN219714835U (en) | 2022-04-06 | 2022-04-06 | Dust hopper detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219714835U true CN219714835U (en) | 2023-09-19 |
Family
ID=87979715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220787445.9U Active CN219714835U (en) | 2022-04-06 | 2022-04-06 | Dust hopper detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219714835U (en) |
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2022
- 2022-04-06 CN CN202220787445.9U patent/CN219714835U/en active Active
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