CN215115333U - Flat-head pulverized coal sampling device - Google Patents
Flat-head pulverized coal sampling device Download PDFInfo
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- CN215115333U CN215115333U CN202120490339.XU CN202120490339U CN215115333U CN 215115333 U CN215115333 U CN 215115333U CN 202120490339 U CN202120490339 U CN 202120490339U CN 215115333 U CN215115333 U CN 215115333U
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Abstract
The utility model relates to a flat-head pulverized coal sampling device, which comprises a flat-head sampling gun, a centrifugal separation device, a collection tank, an air compressor, an air heater and a suction pump, wherein a pulverized coal sampling pipe is arranged in the flat-head sampling gun, the flat-head sampling gun is connected with the centrifugal separation device through a pipeline, the centrifugal separation device is connected with the collection tank, and the centrifugal separation device is respectively connected with the suction pump and the air compressor through pipelines; the flat-head coal powder sampling device can solve the problem that a sampling gun and a connecting pipeline are blocked under the condition of low environmental temperature, and can realize the reverse purging of the coal powder sampling device before coal powder sampling.
Description
Technical Field
The utility model relates to a crew cut buggy sampling device, concretely relates to crew cut buggy constant speed sampling device of direct-fired formula powder process system for the buggy sample in the powder process system test process.
Background
With the continuous development of society, the national requirements on environmental protection and energy conservation of thermal power generating units are gradually improved. In recent years, a newly built thermal power generating unit generally adopts a direct-fired pulverizing system, and the coal powder fineness monitoring in the direct-fired pulverizing system is an important parameter for boiler combustion adjustment of a thermal power plant. In the direct-fired pulverizing system, a plurality of pulverized coal pipelines are arranged at the outlet of each coal mill, and the pulverized coal concentration and the fineness of each pulverized coal pipeline are different. The concentration deviation of the coal powder in each powder conveying pipeline can influence the air-coal ratio of each combustor, thereby influencing the combustion organization in the furnace and the emission of pollutants. Under the background, coal power plants attach importance to the fineness of the coal powder of the units, and coal powder sampling in the test process of a pulverizing system is attached importance.
A flat-head coal powder sampling device is generally adopted for coal powder sampling in field tests of domestic coal pulverizing systems at present. Related researchers at home and abroad also improve the flat-head coal powder sampling gun, such as the flat-head coal powder sampling gun invented by Shanghai power generation equipment complete set design research institute, and compared with the original common flat-head coal powder sampling gun, the flat-head coal powder sampling gun can improve the sampling efficiency and reduce the manual strength. The flat-head coal powder sampling device is flexible and convenient to use on site, but has some defects. Under the condition of low temperature in winter in northern areas of China, the sampling gun and a connecting pipeline between the sampling gun and the coal powder collecting tank are easy to be blocked in the field coal powder sampling process, so that the working efficiency is influenced; a common coal dust collecting tank is a stainless steel tank, and the coal dust collecting amount in the collecting tank cannot be observed in the sampling process; after the coal powder sampling of a certain powder feeding pipeline is finished, the retained coal powder in a sampling gun, a connecting pipeline and a centrifugal separation device needs to be swept and cleaned, if the compressed air on site is used for sweeping, the compressed air on site often contains water and oil, so that water and oil are attached to the inner walls of the sampling gun and the connecting pipeline, and the sampling gun and the connecting pipeline are easily blocked in the sampling process.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that exists among the prior art, provide one kind and can solve the problem that sampling gun and connecting tube blocked up under the lower condition of ambient temperature, also can realize the buggy sampling device's the flat head buggy sampling device who anti-sweeps before the buggy sample simultaneously.
In order to achieve the above object, the utility model provides a technical scheme does: the utility model provides a crew cut buggy sampling device, includes crew cut sampling gun, centrifugal separation device, collection tank, air compressor, air heater, suction pump, the inside buggy sampling tube that is equipped with of crew cut sampling gun, the crew cut sampling gun passes through the pipeline and is connected with centrifugal separation device, and centrifugal separation device is connected with the collection tank, centrifugal separation device passes through the pipeline and is connected with suction pump and air compressor respectively.
The technical scheme is further designed as follows: an air heater is also arranged between the centrifugal separation device and the air compressor.
The technical scheme is further designed as follows: the flat-head sampling gun is connected with the centrifugal separation device through a heat tracing connecting pipeline.
The technical scheme is further designed as follows: one end of the heat tracing connecting pipeline is connected with a heat tracing pipeline temperature controller.
The technical scheme is further designed as follows: and two ends of the heat tracing connecting pipeline are provided with C-shaped quick connectors.
The technical scheme is further designed as follows: the flat-head sampling gun is provided with a fixed differential pressure gauge, and two ends of the fixed differential pressure gauge are respectively connected with the inner static pressure tube seat and the outer static pressure tube seat through pressure gauge tubes.
The technical scheme is further designed as follows: the inner static pressure pipe seat is connected with the coal powder sampling pipe through a built-in pressure leading pipe of the flat-head sampling gun, and the outer static pressure pipe seat is connected with an outer static pressure hole of the flat-head sampling gun through the built-in pressure leading pipe of the flat-head sampling gun.
The technical scheme is further designed as follows: and the inner static pressure pipe seat and the outer static pressure pipe seat are both connected with a back flushing pipe joint.
The technical scheme is further designed as follows: the air compressor is respectively connected with the two back-blowing pipe joints through pipelines.
The technical scheme is further designed as follows: the collecting tank is made of transparent plastic materials, and a steel protection device is arranged outside the collecting tank.
Compared with the prior art, the technical scheme of the utility model beneficial effect who has do:
the utility model discloses a buggy sampling device can solve the problem that sampling gun and connecting tube blocked up under the lower condition of ambient temperature, also can realize buggy sampling device's anti-sweeping before the buggy sample simultaneously. The flat-head sampling gun is provided with a fixed differential pressure gauge, so that differential pressure regulation in the constant-speed sampling process can be checked conveniently, and two ends of the differential pressure gauge are respectively connected with the inner static pressure pipe seat and the outer static pressure pipe seat. And the two ends of the heat tracing pipeline are provided with C-shaped quick connectors, so that the field working efficiency is improved. The collecting tank adopts the transparent plastic material, is convenient for observe the buggy collection volume in the collecting tank, and the external steel protector of collecting tank improves the crashproof performance of collecting tank.
The utility model discloses a buggy sampling device can avoid the connecting tube jam between sample in-process sampling gun and the buggy collecting vessel under the lower condition of temperature winter to improve work efficiency, reduce testing personnel's intensity of labour.
Drawings
Fig. 1 is a schematic view of a pulverized coal sampling apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a sampling gun of a pulverized coal sampling apparatus;
FIG. 3 is a schematic diagram of the reverse purging operation of the pulverized coal sampling device;
in the figure: 1. the device comprises a flat-head sampling gun, 2, an inner static pressure pipe seat, 3, an outer static pressure pipe seat, 4, a back-flushing sweeping pipe joint, 5, a differential pressure gauge, 6, a coal powder sampling pipe, 7, a heat tracing connecting pipe, 8, a centrifugal separation device, 9, a collecting tank, 10, a connecting hose, 11, a suction pump, 12, a heat tracing pipe temperature controller, 13, an air heater, 14, an air compressor, 15 and a three-way valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Examples
As shown in figure 2, the sampling head of the coal powder flat-head sampling gun 1 is a cylindrical flat-head type at the front end of the device, a sampling hole is formed right below the sampling head, and a coal powder sampling tube 6 is arranged inside the sampling head. The tail part of the sampling gun is provided with an inner static pressure pipe seat 2 and an outer static pressure pipe seat 3, the inner static pressure pipe seat 2 is connected with a pulverized coal sampling pipe 6 through a built-in pressure leading pipe of the sampling gun, and the outer static pressure pipe seat 3 is connected with an outer static pressure hole of the gun body through the built-in pressure leading pipe of the sampling gun. The inner and outer static pressure tube seats at the tail part of the flat-head sampling gun 1 are respectively connected with a reverse purging tube joint 4. The flat-head sampling gun 1 is provided with a fixed differential pressure gauge 3, and two ends of the fixed differential pressure gauge 3 are respectively connected with an inner static pressure tube seat and an outer static pressure tube seat through a pressure gauge tube.
As shown in the combined figure 1, the connecting pipeline between the flat head sampling gun 1 and the centrifugal separation device 8 is provided with a heat tracing pipeline 7, the heating mode is electric heating, the heating temperature is controlled by a heat tracing pipeline temperature controller 12, the temperature of hot air can be adjusted according to actual conditions, the heater can be closed when the ambient temperature is higher, the flat head sampling gun can be preheated by the hot air when the ambient temperature is lower, the two ends of the heat tracing connecting pipeline are C-shaped quick connectors, and the pipeline, the sampling gun and the centrifugal separation device are convenient to quickly connect. A collecting tank 9 is connected below the centrifugal separation device 8. The suction pump 11 is connected to the centrifugal separator 8 via a connecting hose 10. The collection tank 9 is made of transparent plastic, so that the collection amount of pulverized coal in the collection tank can be observed conveniently, and the collection tank 9 is externally provided with a steel protection device.
In the test process of the direct-fired pulverizing system of the coal-fired unit, a coal powder sample is sampled from a powder conveying pipeline at the outlet of a coal mill. Before sampling, purging all parts of the sampling device, wherein the purging connection mode is as shown in fig. 3, the centrifugal separation device 8 is connected with an air compressor 14 through a connecting hose 10, an outlet of the air compressor 14 is connected with an air heater 13, a three-way valve 15 is arranged between the air heater 13 and the connecting hose 10, another channel of the three-way valve 15 is connected with another connecting hose, and the connecting hose is respectively connected with two back-purging pipe joints 4 through another three-way valve. The air compressor 13 in this embodiment provides a continuous air source for the back flushing of the pulverized coal sampling device, and the air compressor 13 is movable, so as to facilitate flexible use of field tests.
During purging, the differential pressure gauge 3 is disconnected with the inner static pressure tube seat and the outer static pressure tube seat, and the purge gas flows through the inner static pressure tube seat and the outer static pressure tube seat and is discharged outwards; the pulverized coal collection tank 9 is removed from the centrifugal separation device 8, and the purge gas flows through the centrifugal separation device and is discharged outwards. The purging step is as follows: and starting an air compressor 14 and an air heater 13, adjusting the temperature of hot air to a preset temperature, and purging and preheating the flat head sampling gun 1 (comprising an inner static pressure pipe and an outer static pressure pipe), the heat tracing connecting pipe 7 and the centrifugal separation device 8 by using the hot air. And (4) after the purging is finished, the connecting hose is removed, and the back-purging pipe joint 4 is blocked.
The coal powder sampling device is combined according to the connection mode of the figure 1 to prepare for sampling. The heat tracing pipe 7 is connected with a power supply to heat up, and the temperature controller of the heat tracing pipe is adjusted to make the temperature of the heat tracing pipe 7 reach the preset temperature. After the sampling device is connected and completed, the centrifugal separation device 8 is separated from the collection tank 9, a sampling port of the powder feeding pipeline is opened, a flat-head sampling gun is inserted into the sampling port and the sampling port is sealed, the static pressure difference inside and outside the sampling gun is adjusted by adjusting the output force of the suction pump 11, constant-speed sampling is realized, the static pressure difference inside and outside the sampling gun is adjusted to zero, and the operation of the suction pump 11 is stopped. The coal dust collecting tank 9 is connected with the centrifugal separation device 8, the suction pump 11 is started, and coal dust sampling is started. And after sampling, stopping the suction pump 11, pouring the coal powder sample in the collecting tank 9 into a sampling bag, and finishing sampling.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A flat-head coal powder sampling device is characterized in that: the device comprises a flat-head sampling gun, a centrifugal separation device, a collection tank, an air compressor, an air heater and a suction pump, wherein a pulverized coal sampling tube is arranged inside the flat-head sampling gun, the flat-head sampling gun is connected with the centrifugal separation device through a pipeline, the centrifugal separation device is connected with the collection tank, and the centrifugal separation device is respectively connected with the suction pump and the air compressor through pipelines.
2. The pulverized coal flathead sampling device of claim 1, wherein: an air heater is also arranged between the centrifugal separation device and the air compressor.
3. The pulverized coal flathead sampling device of claim 1, wherein: the flat-head sampling gun is connected with the centrifugal separation device through a heat tracing connecting pipeline.
4. The pulverized coal flathead sampling device of claim 3, wherein: one end of the heat tracing connecting pipeline is connected with a heat tracing pipeline temperature controller.
5. The pulverized coal flathead sampling device of claim 4, wherein: and two ends of the heat tracing connecting pipeline are provided with C-shaped quick connectors.
6. The pulverized coal flathead sampling device of claim 5, wherein: the flat-head sampling gun is provided with a fixed differential pressure gauge, and two ends of the fixed differential pressure gauge are respectively connected with the inner static pressure tube seat and the outer static pressure tube seat through pressure gauge tubes.
7. The pulverized coal flathead sampling device of claim 6, wherein: the inner static pressure pipe seat is connected with the coal powder sampling pipe through a built-in pressure leading pipe of the flat-head sampling gun, and the outer static pressure pipe seat is connected with an outer static pressure hole of the flat-head sampling gun through the built-in pressure leading pipe of the flat-head sampling gun.
8. The pulverized coal flathead sampling device of claim 7, wherein: and the inner static pressure pipe seat and the outer static pressure pipe seat are both connected with a back flushing pipe joint.
9. The pulverized coal flathead sampling device of claim 8, wherein: the air compressor is respectively connected with the two back-blowing pipe joints through pipelines.
10. The pulverized coal flathead sampling device of claim 1, wherein: the collecting tank is made of transparent plastic materials, and a steel protection device is arranged outside the collecting tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120490339.XU CN215115333U (en) | 2021-03-08 | 2021-03-08 | Flat-head pulverized coal sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120490339.XU CN215115333U (en) | 2021-03-08 | 2021-03-08 | Flat-head pulverized coal sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215115333U true CN215115333U (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120490339.XU Active CN215115333U (en) | 2021-03-08 | 2021-03-08 | Flat-head pulverized coal sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215115333U (en) |
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2021
- 2021-03-08 CN CN202120490339.XU patent/CN215115333U/en active Active
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