CN202442940U - Device for carrying out online measurement on concentration of primary-air pulverized coals in boilers - Google Patents
Device for carrying out online measurement on concentration of primary-air pulverized coals in boilers Download PDFInfo
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- CN202442940U CN202442940U CN2012200404196U CN201220040419U CN202442940U CN 202442940 U CN202442940 U CN 202442940U CN 2012200404196 U CN2012200404196 U CN 2012200404196U CN 201220040419 U CN201220040419 U CN 201220040419U CN 202442940 U CN202442940 U CN 202442940U
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- photocell
- steel pipe
- sampling head
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Abstract
The utility model discloses a device for carrying out online measurement on concentration of primary-air pulverized coal in boilers, which relates to a device for carrying out online measurement on concentration of pulverized coal, and aims to solve the problems that the conventional device for carrying out the online measurement on the concentration of the primary-air pulverized coal in the boilers is short, high in manufacturing cost, low in measuring accuracy and the like, and ensure the safe and economic operation problem of the boilers. According to the device, a fiber bundle vertically passes through a primary-air duct, a steel pipe is sleeved on the fiber bundle, a sampling head is provided with a pulverized coal through hole along the axial direction, two sides of the sampling head are respectively provided with a sampling head fixed groove along the radial direction, the steel pipe is fixedly arranged on the sampling head fixed grooves on the two sides of the sampling head, the sampling head is positioned in the middle of the fiber bundle, the conjunct parts of the primary-air duct and the steel pipe are respectively provided with a seal assembly, one end of the steel pipe is provided with a light source box, and the other end of the steel pipe is provided with a photocell box. The device disclosed by the utility model is especially applicable to the online measurement on the concentration of the primary-air pulverized coal in a pulverized coal bin and a non-pulverized coal bin combustion system.
Description
Technical field
The utility model relates to a kind of coal powder density on-line measurement device, is specifically related to boiler concentration of pulverized coal on-line measurement device.
Background technology
The boiler overwhelming majority of generating plant is a coal-burning boiler, and coal is ground into coal dust, in the boiler internal combustion.Pulverized coal conveying and AIR MIXTURES are wind of boiler in boiler.A large power plant boiler has 4-6 airduct road simultaneously to boiler input coal dust.When boiler load changed, the coal dust amount of input changed thereupon.Concentration of pulverized coal requires in the scope of regulation, and the excessive or too small safe and economical boiler that all directly influences of coal powder density moves.The coal powder density in each airduct road should be consistent, and makes boiler be in best fired state.Therefore, online detection boiler concentration of pulverized coal is vital to the safety and economic operation of coal-burning power plant.But, also there is not to supply widely used concentration of pulverized coal on-line measurement device so far, be a domestic and international long-term unsolved difficult problem.A large amount of research work have been done by China Xi'an hot working research institute, have obtained some scientific payoffss, and a kind of boiler concentration of pulverized coal On-line Measuring Method and measurement mechanism are provided.This method is to measure the flow of a wind and the temperature of a wind, calculates the coal powder density of a wind with the method for calculating heat balance.This measurement mechanism of Xi'an hot working research institute only is applicable to the combustion system of Pulverized Coal Bin can not be used for directfired installation.This measurement mechanism systematic comparison is complicated.The measuring error of a wind flow and thermometric error all influence the precision that concentration of pulverized coal is measured.The measuring method delay of response of application of heat balance can not react the conversion of coal powder density rapidly, and the concentration of pulverized coal on-line measurement device of Xi'an hot working research institute is not seen widespread use so far.
Existing 1,000,000,000 kilowatts of China's generation current installed capacity, the coming five years also will increase by 500,000,000 kilowatts, wherein is the coal-burning power plant more than 70%, the coal-fired billions of tons in annual generating plant.The coal powder density of a wind is excessive or too smallly all directly influence safe and economical boiler operation, therefore, press for cost low, measure boiler concentration of pulverized coal on-line measurement device accurately.
The utility model content
The purpose of the utility model is in order to solve problems such as existing boiler concentration of pulverized coal on-line measurement device lacks, cost is high, measuring accuracy is low; In order to ensure the problem of safe and economical boiler operation, and then a kind of boiler concentration of pulverized coal on-line measurement device is provided.
The technical scheme of the utility model is: boiler concentration of pulverized coal on-line measurement device comprises fibre bundle, steel pipe, one or two sampling heads, light source box, photocell box and two seal assemblies; Fibre bundle vertically is located on airduct road; And the airduct road is passed at the two ends of fibre bundle one time; Steel pipe socket is contained on the fibre bundle, and glued through heat-resistant adhesive between the inwall of steel pipe and the fibre bundle
When the quantity of sampling head is one,
Sampling head has coal dust vertically through the hole, and the both sides of sampling head radially respectively have a sampling head pickup groove, and steel pipe is packed on the sampling head pickup groove of sampling head both sides, and sampling head is positioned at the middle part of fibre bundle,
When the quantity of sampling head is two,
Each sampling head all has coal dust vertically through the hole, and the both sides of each sampling head radially respectively have a sampling head pickup groove, and steel pipe is packed in respectively on the sampling head pickup groove of sampling head both sides, and two sampling heads are positioned at the middle part of fibre bundle side by side,
The intersection of airduct road and steel pipe respectively is provided with a seal assembly, and an end of steel pipe is provided with light source box, and the other end of steel pipe is provided with photocell box; Said light source box comprises light source box end plate, light source box lid, light source box shell, light source box dop, light source box metal cap, electroluminescent element and light source box insulcrete; The light source box end plate is connected with the end thread of steel pipe one end, and the light source box metal cap is packed on the light source box end plate of a relative side with steel pipe, and electroluminescent element is packed in the middle part of light source box insulcrete; The light source box insulcrete is packed in respectively on light source box metal cap and the light source box end plate through bolt; Electroluminescent element is sealed in the light source box metal cap, the fibre bundle of the light beam that electroluminescent element sends in the steel pipe, and the light source box shell is arranged on the light source box end plate; The middle part of light source box lid has the power lead intake; Light source box lid lid is contained in the openend of light source box shell, and the light source box dop is arranged in the power lead intake, and said photocell box comprises photocell box end plate, photocell box lid, photocell box shell, photocell box dop, photocell box metal cap, photoelectric cell and photocell box insulcrete; The photocell box end plate is connected with the end thread of the steel pipe other end; The photocell box metal cap is packed on the photocell box end plate of a relative side with steel pipe, and photoelectric cell is packed in the middle part of photocell box insulcrete, and the photocell box insulcrete is packed in respectively on photocell box metal cap and the photocell box end plate through bolt; Photoelectric cell is sealed in the photocell box metal cap; And the center of the fibre bundle of photronic center in the steel pipe, the photocell box shell is arranged on the photocell box end plate, and the middle part of photocell box lid has output signal outlet; Photocell box lid lid is contained in the openend of photocell box shell, and the photocell box dop is arranged in the output signal outlet.
The utility model compared with prior art has following effect: 1. the light beam that sends of the utility model electroluminescent element is transferred in the photocell box through fibre bundle, sampling head; The coal powder density of sampling head directly affects the intensity of photoelectric cell receiving optical signals; The variation of coal powder density causes the variation of photoelectric cell output circuit voltage; Output voltage concerned over time output on instrument and the computing machine; Just coal powder density that can a wind of online demonstration has been realized direct measurement concentration of pulverized coal, measuring accuracy and highly sensitive.In the actual production process,, effectively guaranteed the safety and economic operation of boiler through monitoring and regulation and control coal powder density.2. the utility model is simple in structure, manufactures easily, and cost is low.3 the utility model do not require the length of the straight length of a pipeline, and satisfy easily the installation site.4. the utility model reliable operation, maintenance load is few.5. the utility model is particularly useful for having the concentration of pulverized coal on-line measurement of Pulverized Coal Bin and coal dust free storehouse (direct-firing) combustion system.
Description of drawings
Fig. 1 is the front view that the utility model has a sampling head; Fig. 2 is the cut-open view of Fig. 1 at the A-A place; The enlarged drawing of Fig. 3 seal assembly; Fig. 4 is the enlarged drawing of light source box; Fig. 5 is the enlarged drawing of photocell box; Fig. 6 is the front view that the utility model has two sampling heads; Fig. 7 is the circuit diagram (power supply shown in the figure is a photoelectric cell) of output voltage signal in the utility model photocell box.
Embodiment
Embodiment one: combine Fig. 1-Fig. 7 that this embodiment is described; This embodiment comprises fibre bundle 2, steel pipe 3, one or two sampling heads 5, light source box 7, photocell box 8 and two seal assemblies 6; Fibre bundle 2 vertically is located on airduct road 1, and the two ends of fibre bundle 2 pass airduct road 1 one time, and steel pipe 3 is sleeved on the fibre bundle 2; And it is glued between the inwall of steel pipe 3 and the fibre bundle 2 through heat-resistant adhesive
When the quantity of sampling head 5 is one,
When the quantity of sampling head 5 is two,
Each sampling head 5 all has coal dust vertically through hole 5-1; The both sides of each sampling head 5 radially respectively have a sampling head pickup groove 5-2; Steel pipe 3 is packed in respectively on the sampling head pickup groove 5-2 of sampling head 5 both sides, and two sampling heads 5 are positioned at the middle part of fibre bundle 2 side by side
The refractory seals glue of this embodiment is 350 ℃ of high-temperature seal adhesives, and manufacturer is that Nanjing infant genius's special glass technology company limited, Jinan one hundred are contained glass technology company limited, Guangzhou endurance Environmental Protection Technology Co., Ltd, Beijing space difficult to understand and can prosperous mechanical component be repaired group company and Guangzhou permanent flourish special glass company limited etc.
Centre distance between two sampling heads 5 of this embodiment is 1/3rd of airduct road 1 internal diameter.
The electroluminescent element 7-6 of this embodiment is packed on the light source box insulcrete 7-7; Described electroluminescent element 7-6 is a light emitting diode; Light emitting diode is supplied power by constant voltage dc source, simultaneously, on the outerplanar of light source box insulcrete 7-7, is fixed with a plurality of connection terminals.
The photoelectric cell 8-6 of this embodiment is packed in the middle part of photocell box insulcrete 8-7, fixed resistance R on the photocell box insulcrete 8-7 outerplanar
0, R
1, R
2With a plurality of connection terminals, photoelectric cell 8-6 receives the light through fibre bundle 2 projections, and the photocurrent of photoelectric cell 8-6 output is through the copper-manganese resistance R
0, copper resistance R
1With adjustable resistance R
2, resistance R
0Voltage is as the output voltage signal of the utility model.
Embodiment two: combine Fig. 4-Fig. 5 that this embodiment is described, have a plurality of air vent 7-3-1 on the circle wall of the light source box shell 7-3 of this embodiment, have a plurality of air vent 8-3-1 on the circle wall of photocell box shell 8-3.So be provided with, ventilation effect is good.Other composition is identical with embodiment one with annexation.
Be uniformly distributed with 2 all air vent 7-3-1 on the circle wall of the light source box shell 7-3 of this embodiment, be uniformly distributed with 2 all air vent 8-3-1 on the circle wall of photocell box shell 8-3.
Embodiment three: combine Fig. 2 and Fig. 3 that this embodiment is described; The said coal powder density on-line measurement device of this embodiment also comprises Antiwear casing 4; Antiwear casing 4 is sleeved on the steel pipe 3, and the intersection of airduct road 1 and Antiwear casing 4 respectively is provided with a seal assembly 6.So be provided with, effectively protect steel pipe 3 in use not to be worn, prolonged the serviceable life of steel pipe 3.Other composition is identical with embodiment two with annexation.
Embodiment four: combine Fig. 1 and Fig. 3 that this embodiment is described; Each seal assembly 6 of this embodiment includes sealing gasket 6-1, flange 6-2, steel bushing 6-3, nut 6-4, steel loop 6-5 and airtight and watertight padding 6-6; Flange 6-2 be packed in airduct road 1 and with an airduct road 1 of the intersection of fibre bundle 2 on; Sealing gasket 6-1 is arranged between airduct road 1 and the flange 6-2; Steel bushing 6-3 is sleeved on the outer wall of Antiwear casing 4, and the upper inside wall of steel bushing 6-3 is provided with groove, and airtight and watertight padding 6-6 is arranged in the groove on steel bushing 6-3 top; And airtight and watertight padding 6-6 is between steel bushing 6-3 and Antiwear casing 4, and steel loop 6-5 fixes steel bushing 6-3 and airtight and watertight padding 6-6 through nut 6-4.So be provided with, more firm with fibre bundle and sampling head sealing and fixing on airduct road.Other composition is identical with embodiment one or three with annexation.
Embodiment five: combine Fig. 2 that this embodiment is described; The said on-line measurement device of this embodiment also comprises anti-abrasive disc 9; The size of anti-abrasive disc 9 and the size and the shape of shape and sampling head 5 ends are complementary, and anti-abrasive disc 9 is packed in the windward side of sampling head 5.So be provided with, effectively raise the serviceable life of sampling head.Other composition is identical with embodiment four with annexation.
The course of work of the utility model is:
Electroluminescent element (being light emitting diode) is supplied power by D.C. regulated power supply; Send the light beam of certain intensity; Light beam passes the center pit of sampling head and the fibre bundle of the sampling head other end through optical fiber, is incident upon on the photoelectric cell; When not having a wind to pass through the center pit of sampling head, the photocurrent that photoelectric cell output is bigger; When the center pit of distinguished and admirable over-sampling head once, because pulverized coal particle has reduced to be incident upon photronic light intensity through the center pit of sampling head, the photocurrent of photoelectric cell output reduces; Along with concentration of pulverized coal changes, photocurrent changes thereupon, and coal powder density and photocurrent have funtcional relationship, and the photocurrent of photoelectric cell output passes through R
0, R
1, R
2Three resistance, R
0The voltage at resistance two ends inserts instrument and computing machine, can measure and demonstrate the coal powder density of a wind, wherein: R
1Be used for the photoelectric cell ambient temperature compensation, R
2Be used to regulate the photocurrent setting value, when promptly coal powder density is zero, R
0The resistance voltage is a setting value.
Claims (5)
1. boiler concentration of pulverized coal on-line measurement device; It is characterized in that: said on-line measurement device comprises fibre bundle (2), steel pipe (3), one or two sampling heads (5), light source box (7), photocell box (8) and two seal assemblies (6); Fibre bundle (2) vertically is located on the airduct road (1), and the two ends of fibre bundle (2) pass an airduct road (1), and steel pipe (3) is sleeved on the fibre bundle (2); And it is glued between the inwall of steel pipe (3) and the fibre bundle (2) through heat-resistant adhesive
When the quantity of sampling head (5) is one,
Sampling head (5) has coal dust vertically through hole (5-1); The both sides of sampling head (5) radially respectively have a sampling head pickup groove (5-2); Steel pipe (3) is packed in the sampling head pickup groove (5-2) of sampling head (5) both sides, and sampling head (5) is positioned at the middle part of fibre bundle (2)
When the quantity of sampling head (5) is two,
Each sampling head (5) all has coal dust vertically through hole (5-1); The both sides of each sampling head (5) radially respectively have a sampling head pickup groove (5-2); Steel pipe (3) is packed in respectively on the sampling head pickup groove (5-2) of sampling head (5) both sides; And two sampling heads (5) are positioned at the middle part of fibre bundle (2) side by side
An airduct road (1) respectively is provided with a seal assembly (6) with the intersection of steel pipe (3); One end of steel pipe (3) is provided with light source box (7); The other end of steel pipe (3) is provided with photocell box (8); Said light source box (7) comprises light source box end plate (7-1), light source box lid (7-2), light source box shell (7-3), light source box dop (7-4), light source box metal cap (7-5), electroluminescent element (7-6) and light source box insulcrete (7-7); Light source box end plate (7-1) is connected with the end thread of steel pipe (3) one ends; Light source box metal cap (7-5) is packed on the light source box end plate (7-1) with the relative side of steel pipe (3); Electroluminescent element (7-6) is packed in the middle part of light source box insulcrete (7-7), and light source box insulcrete (7-7) is packed in respectively on light source box metal cap (7-5) and the light source box end plate (7-1) through bolt, and electroluminescent element (7-6) is sealed in the light source box metal cap (7-5); The light beam that electroluminescent element (7-6) sends is over against the interior fibre bundle (2) of steel pipe (3); Light source box shell (7-3) is arranged on the light source box end plate (7-1), and the middle part of light source box lid (7-2) has power lead intake (7-2-1), and light source box lid (7-2) lid is contained in the openend of light source box shell (7-3); Light source box dop (7-4) is arranged in the power lead intake (7-2-1); Said photocell box (8) comprises photocell box end plate (8-1), photocell box lid (8-2), photocell box shell (8-3), photocell box dop (8-4), photocell box metal cap (8-5), photoelectric cell (8-6) and photocell box insulcrete (8-7), and photocell box end plate (8-1) is connected with the end thread of steel pipe (3) other end, and photocell box metal cap (8-5) is packed on the photocell box end plate (8-1) with the relative side of steel pipe (3); Photoelectric cell (8-6) is packed in the middle part of photocell box insulcrete (8-7); Photocell box insulcrete (8-7) is packed in respectively on photocell box metal cap (8-5) and the photocell box end plate (8-1) through bolt, and photoelectric cell (8-6) is sealed in the photocell box metal cap (8-5), and the center of photoelectric cell (8-6) is over against the center of the interior fibre bundle (2) of steel pipe (3); Photocell box shell (8-3) is arranged on the photocell box end plate (8-1); The middle part of photocell box lid (8-2) has output signal outlet (8-2-1), and photocell box lid (8-2) lid is contained in the openend of photocell box shell (8-3), and photocell box dop (8-4) is arranged in the output signal outlet (8-2-1).
2. boiler concentration of pulverized coal on-line measurement device according to claim 1; It is characterized in that: have a plurality of air vents (7-3-1) on the circle wall of light source box shell (7-3), have a plurality of air vents (8-3-1) on the circle wall of photocell box shell (8-3).
3. boiler concentration of pulverized coal on-line measurement device according to claim 2; It is characterized in that: said coal powder density on-line measurement device also comprises Antiwear casing (4); Antiwear casing (4) is sleeved on the steel pipe (3), and the intersection of an airduct road (1) and Antiwear casing (4) respectively is provided with a seal assembly (6).
4. according to claim 1 or 3 described boiler concentration of pulverized coal on-line measurement devices; It is characterized in that: said each seal assembly (6) includes sealing gasket (6-1), flange (6-2), steel bushing (6-3), nut (6-4), steel loop (6-5) and airtight and watertight padding (6-6); Flange (6-2) be packed in an airduct road (1) and with the airduct road (1) of the intersection of fibre bundle (2) on; Sealing gasket (6-1) is arranged between an airduct road (1) and the flange (6-2); Steel bushing (6-3) is sleeved on the outer wall of Antiwear casing (4), and the upper inside wall of steel bushing (6-3) is provided with groove, and airtight and watertight padding (6-6) is arranged in the groove of steel bushing (6-3) portion; And airtight and watertight padding (6-6) is positioned between steel bushing (6-3) and the Antiwear casing (4), and steel loop (6-5) is fixing with steel bushing (6-3) and airtight and watertight padding (6-6) through nut (6-4).
5. boiler concentration of pulverized coal on-line measurement device according to claim 4; It is characterized in that: said on-line measurement device also comprises anti-abrasive disc (9); The size of anti-abrasive disc (9) and the size and the shape of shape and sampling head (5) end are complementary, and anti-abrasive disc (9) is packed in the windward side of sampling head (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200404196U CN202442940U (en) | 2012-02-08 | 2012-02-08 | Device for carrying out online measurement on concentration of primary-air pulverized coals in boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200404196U CN202442940U (en) | 2012-02-08 | 2012-02-08 | Device for carrying out online measurement on concentration of primary-air pulverized coals in boilers |
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| Publication Number | Publication Date |
|---|---|
| CN202442940U true CN202442940U (en) | 2012-09-19 |
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ID=46824384
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200404196U Expired - Lifetime CN202442940U (en) | 2012-02-08 | 2012-02-08 | Device for carrying out online measurement on concentration of primary-air pulverized coals in boilers |
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| Country | Link |
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| CN (1) | CN202442940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590055A (en) * | 2012-02-08 | 2012-07-18 | 杨英杰 | Online measuring device of primary air pulverized coal density of boiler |
-
2012
- 2012-02-08 CN CN2012200404196U patent/CN202442940U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590055A (en) * | 2012-02-08 | 2012-07-18 | 杨英杰 | Online measuring device of primary air pulverized coal density of boiler |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120919 Effective date of abandoning: 20131023 |
|
| RGAV | Abandon patent right to avoid regrant |