CN204574066U - The device of ash discharge bottom a kind of boiler back end ductwork and steam generator system - Google Patents
The device of ash discharge bottom a kind of boiler back end ductwork and steam generator system Download PDFInfo
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- CN204574066U CN204574066U CN201420836159.2U CN201420836159U CN204574066U CN 204574066 U CN204574066 U CN 204574066U CN 201420836159 U CN201420836159 U CN 201420836159U CN 204574066 U CN204574066 U CN 204574066U
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Abstract
The utility model relates to device and the steam generator system of ash discharge bottom a kind of boiler back end ductwork.The device of this ash discharge comprises ash tube, and ash tube is located between the import and export flue of the attachment device of boiler, arranges gravity type flapper in ash tube.Preferably, each ash tube preferably arranges two gravity flappers.Two gravity type flappers stagger upset, and run continuously, that is: when first flapper is opened, second flapper is in closed condition, and ash is fallen on second flapper in time will opening, and first flapper is closed.The utility model arranges actual conditions according to flue, reasonable Arrangement ash tube quantity in limited space, gravity is adopted to make dust stratification turn back in former flue smoothly from row's principle, apparatus structure is simple, handling safety is reliable, and low cost, can be used for ash discharge bottom the flue gas boiler back end ductworks such as thermal power plant, petrochemical industry power station, metallurgy boiler.
Description
Technical field
The utility model belongs to mechanical technique, boiler technology field, be specifically related to the device of ash discharge bottom a kind of boiler back end ductwork and adopt the steam generator system of this device, can be used for ash discharge bottom the flue gas boiler back end ductworks such as thermal power plant, petrochemical industry power station, metallurgy boiler.
Background technology
When setting up the devices such as denitration at boiler, need flue to draw a segment distance, flue gas returns boiler tail (such as before air preheater) again after newly added equipment.Because flue gas is generally when entering newly-increased device (or being called attachment device), need the straight length of a section longer, and be newly equipped with posting port and generally will exceed boiler export more than flue 20m, cause, when flue upwards turns to and upwards flows, having ash more and separating.Thus after setting up denitrification apparatus, according to flue entrance practical operation situation, the dust stratification amount in flue increases greatly, some boiler of power plant back-end ductwork even dust stratification at more than 1.5m.
Conventional process mode arranges ash bucket below the flue position of easy dust stratification, and the dust collected by ash bucket enters storehouse pump through ash tube, then delivers to grey storehouse or electrostatic precipitator ash bucket through ash conveying pipe.The shortcoming of which is: 1. system complex, needs facility such as design storehouse pump and ash conveying pipe etc.; 2. difficult arrangement.The import and export flue spacing of some newly-increased facility is little, does not arrange the space (ash tube arranges that with horizontal plane angle be 60 DEG C) that ash bucket and ash tube road need.
Utility model content
The utility model is for the problems referred to above, the device of ash discharge bottom a kind of boiler back end ductwork is provided and adopts the steam generator system of this device, according to the actual conditions that flue is arranged, reasonable Arrangement ash tube quantity in limited space, makes dust stratification turn back to smoothly in former flue.
For achieving the above object, the utility model adopts following technical scheme:
A device for ash discharge bottom boiler back end ductwork, comprises ash tube, arranges gravity type flapper in described ash tube.
Further, described ash tube is located between the import and export flue of the attachment device of boiler, the setting of ash tube, the ash bucket quantity arranged should be allowed to determine according to space.Generally, each ash bucket arranges an ash tube.
Further, in order to ensure flue gas not crossfire, when conditions permit, each ash tube preferably arranges two gravity flappers.
Further, described two gravity type flappers stagger upset, and run continuously, that is: when first flapper is opened, second flapper is in closed condition, and ash is fallen on second flapper in time will opening, and first flapper is closed.
Further, if the trailing arm length of described gravity type flapper is D, in described two gravity type flappers, the weight position of first flapper is at the 3/4D place, exhaust pass one end apart from attachment device; The weight position of second flapper is at the 1/3D place, exhaust pass one end apart from attachment device.
Further, the dust stratification height on described flapper is arranged according to the inlet outlet pressure differential of described attachment device, and computing formula is:
H＝A×ΔP/B，
Wherein, H is the dry ash vertical height needed above flapper; Δ P is that maximum differential pressure imported and exported by attachment device; A is coefficient, and preferred value is 1.1 ~ 1.3, more preferably 1.2; B is with dry ash than recorrelation coefficient, and preferred value is 6.5 ~ 7.5, more preferably 7.
Further, the vertical height in a described ash tube between two adjacent flappers is not less than H.
Further, described flapper selects the material that can meet flue gas medium temperature, such as Q345.
Further, described attachment device is out of stock equipment.
A kind of steam generator system, comprises boiler and the attachment device being connected this boiler, is provided with the device of ash discharge bottom boiler back end ductwork as above between the import and export flue of described attachment device.
When adopting said apparatus to carry out ash discharge bottom boiler back end ductwork, after boiler plant puts into operation, ash is flapper disposed thereon in ash tube gradually, and ash tube pins by the turnover panel in flapper under the effect of weight; When the ash on turnover panel amasss some, make ash downward when gravity is greater than weight power upwards, accumulated powder also falls by turnover panel action, and then ash tube pins again by reprint under the effect of weight, and so circulation is carried out.Further, two gravity type flappers are set in an ash tube, after putting into operation, two flappers are adjusted respectively, two flappers is staggered upset, and runs continuously, that is: when first flapper is opened, second flapper is in closed condition, and ash is fallen on second flapper in time will opening, and first flapper is closed.
Adopt scheme of the present utility model, can arrange actual conditions according to flue, in limited space, reasonable Arrangement ash tube quantity, makes dust stratification turn back in former flue smoothly; Owing to adopting gravity from arranging principle, apparatus structure is simple, and handling safety is reliable, and low cost.The utility model can widely use on the feed back pipe of middle warehouse formula coal dust preparation system, can be used for ash discharge bottom the flue gas boiler back end ductworks such as thermal power plant, petrochemical industry power station, metallurgy boiler.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device of ash discharge bottom boiler back end ductwork in embodiment.
Fig. 2 is partial enlargement and the operation principle schematic diagram of the device of ash discharge bottom boiler back end ductwork in embodiment.
Fig. 3 is the structural representation of flapper in embodiment.
Detailed description of the invention
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, below by specific embodiments and the drawings, are described further the utility model.
Fig. 1 be the present embodiment boiler back end ductwork bottom the structural representation of device of ash discharge.Wherein 1 is boiler, and 2 is the attachment device (or being called newly-increased device) of boiler, and 3 is the economizer of boiler.Between the inlet flue duct 4 and exhaust pass 5 of attachment device 2, one or more ash tube 6 is set.Ash tube 6 is arranged one or more gravity type flapper 7 (having two flappers in Fig. 1).Arrow in figure in inlet flue duct 4 and exhaust pass 5 represents flue gas flow direction.The setting of ash tube, should allow the ash bucket quantity arranged to determine according to space.Generally, each ash bucket arranges an ash tube.In order to ensure flue gas not crossfire, when conditions permit, each ash tube suggestion preferably arranges two gravity flappers.
Dust stratification height on flapper is arranged according to attachment device import and export pressure reduction.Computing formula is as follows:
H＝A×ΔP/B
The dry ash vertical height (mm) needed above H-flapper;
Maximum differential pressure (Pa) imported and exported by Δ P-attachment device, and as shown in Figure 2, Δ P=P1-P2, P1 are inlet pressure, and P2 is outlet pressure;
A-coefficient, preferred value is 1.1 ~ 1.3, more preferably 1.2;
B-and dry ash are than recorrelation coefficient, and preferred value is 6.5 ~ 7.5, and more preferably 7.
If attachment device is imported and exported between flue can install two flappers, then between two flappers, vertical height is not less than H.
The utility model utilizes gravity type automatic-discharging principle to complete the automatic-discharging of dust stratification, can put on ash system and widely use.
The course of work of said apparatus is described below by instantiation.This example adopts pulverized-coal fired boiler, and attachment device is out of stock equipment, and bottom boiler back end ductwork, the method for ash discharge specifically comprises the steps:
1) deposition of ash
Fig. 3 is the structural representation of flapper, comprises turnover panel 8, weight 9, trailing arm 10 etc.After boiler plant puts into operation, ash 11 is gradually at flapper disposed thereon, ash tube pins by the turnover panel in flapper under the effect of weight, when the dry ash on turnover panel amasss some, dry ash downward from gravity is greater than weight upward force time, dust stratification falls by turnover panel action, and ash tube pins again by reprint under the effect of weight, so circulates.
2) adjustment of flapper
Regulating measure is adjustment force arm lengths.Flapper action is too fast or reset improper, and the ash above flapper can not effectively seal, and causes flapper upper and lower air-flow to gang up, does not have sealing function.
Before flapper drops into, first carry out Primary Location according to the resistance design load of attachment device to weight, generally, when starting to drop into, the resistance of attachment device is greater than actual motion value.
After putting into operation, two flappers are adjusted respectively, to stagger upset until be adjusted to two flappers, and run continuously.Namely when first flapper (flowing to direction from dust stratification) is opened, second flapper is also closed, and dry ash is fallen on second flapper in time will opening, and closes for first.Like this in the opening-closing process of flapper, pipeline is obstructed all the time, can effectively stop air to pass through.
In the present embodiment, if trailing arm length is D (as shown in Figure 3), the weight position of first flapper is at distance far-end (one end of the exhaust pass of attachment device) about 3/4D place; The weight position of second flapper is being about 1/3D place apart from far-end.
Above embodiment is only in order to illustrate the technical solution of the utility model but not to be limited; those of ordinary skill in the art can modify to the technical solution of the utility model or equivalent replacement; and not departing from spirit and scope of the present utility model, protection domain of the present utility model should be as the criterion with described in claim.
Claims (10)
1. a device for ash discharge bottom boiler back end ductwork, is characterized in that, comprises ash tube, arranges gravity type flapper in described ash tube.
2. the device of ash discharge bottom boiler back end ductwork as claimed in claim 1, it is characterized in that: described ash tube is located between the import and export flue of the attachment device of boiler, the quantity of ash tube allows the ash bucket quantity arranged to determine according to space, and each ash bucket arranges an ash tube.
3. the device of ash discharge bottom boiler back end ductwork as claimed in claim 1, is characterized in that: arrange two described gravity type flappers in a described ash tube.
4. the device of ash discharge bottom boiler back end ductwork as claimed in claim 3, it is characterized in that, described two gravity type flappers stagger upset, and run continuously, that is: when first flapper is opened, second flapper is in closed condition, and ash is fallen on second flapper in time will opening, and first flapper is closed.
5. the device of ash discharge bottom boiler back end ductwork as claimed in claim 3, it is characterized in that: set the trailing arm length of described gravity type flapper as D, in described two gravity type flappers, the weight position of first flapper is at the 3/4D place, exhaust pass one end apart from attachment device; The weight position of second flapper is at the 1/3D place, exhaust pass one end apart from attachment device.
6. the device of ash discharge bottom the boiler back end ductwork as described in claim 2 or 5, is characterized in that: the dust stratification height on described flapper is arranged according to the inlet outlet pressure differential of described attachment device, and computing formula is:
H＝A×ΔP/B，
Wherein, H is the dry ash vertical height needed above flapper; Δ P is that maximum differential pressure imported and exported by attachment device; A is coefficient, and value is 1.1 ~ 1.3; B is with dry ash than recorrelation coefficient, and value is 6.5 ~ 7.5.
7. the device of ash discharge bottom boiler back end ductwork as claimed in claim 6, is characterized in that: the vertical height in a described ash tube between two adjacent flappers is not less than H.
8. the device of ash discharge bottom boiler back end ductwork as claimed in claim 1, is characterized in that: described flapper selects to meet the material of flue gas medium temperature.
9. the device of ash discharge bottom boiler back end ductwork as claimed in claim 2, is characterized in that: described attachment device is out of stock equipment.
10. a steam generator system, comprises boiler and the attachment device being connected this boiler, it is characterized in that, is provided with the device of ash discharge bottom the boiler back end ductwork according to any one of claim 1-9 between the import and export flue of described attachment device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420836159.2U CN204574066U (en) | 2014-12-25 | 2014-12-25 | The device of ash discharge bottom a kind of boiler back end ductwork and steam generator system |
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| CN201420836159.2U CN204574066U (en) | 2014-12-25 | 2014-12-25 | The device of ash discharge bottom a kind of boiler back end ductwork and steam generator system |
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| CN204574066U true CN204574066U (en) | 2015-08-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395542A (en) * | 2018-12-20 | 2019-03-01 | 福建龙净脱硫脱硝工程有限公司 | The absorption tower CFB and its ash exhauster |
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2014
- 2014-12-25 CN CN201420836159.2U patent/CN204574066U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395542A (en) * | 2018-12-20 | 2019-03-01 | 福建龙净脱硫脱硝工程有限公司 | The absorption tower CFB and its ash exhauster |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee after: DATANG ENVIRONMENT INDUSTRY GROUP CO., LTD. Address before: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee before: Datang scientific and technological industry Group Co.,Ltd |