CN1062200A - Boiler smoke two-stage dust removal and smoke circulating device - Google Patents
Boiler smoke two-stage dust removal and smoke circulating device Download PDFInfo
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- CN1062200A CN1062200A CN 91111628 CN91111628A CN1062200A CN 1062200 A CN1062200 A CN 1062200A CN 91111628 CN91111628 CN 91111628 CN 91111628 A CN91111628 A CN 91111628A CN 1062200 A CN1062200 A CN 1062200A
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Abstract
The invention belongs to a kind of separation and EGR, particularly a kind of boiler smoke two-stage dust removal and smoke circulating device.The present invention was provided with dust separator again before general spray deduster, and was provided with spray water heater, and the heat nature that utilizes flue gas has improved efficiency of dust collection and dust removing effects with the shower water heating; Set smoke circulating device can make the flue gas recirculation utilization, has promoted the abundant burning of coal, can improve boiler output; Be suitable on coal-burning boiler or coal-fired furnace, vigorously promoting the use.
Description
The invention belongs to a kind of separation and EGR, particularly about a kind of boiler smoke two-stage dust removal and smoke circulating device.
Cities and towns in China, air pollution are mainly from burning of coal, and wherein the flue dust that boiler produced accounts for more than 40%, and especially in the winter time, the cities and towns air pollution of the northern area of China is even more serious, air-polluting flue dust in the flue gas when mainly being boiler fired coal.The spray deduster that is used for boiler smoke at present, be primary dust removing (single dust arrester promptly is set), such deduster, boiler smoke is removed flue dust by contacting with shower water, and shower water is a normal-temperature water, efficiency of dust collection is low, effect is also not satisfactory, in addition up to now, the flue gas recirculation use device is not set all in all dust arrester systems.
The object of the present invention is to provide a kind of boiler smoke two-stage dust removal and smoke circulating device, this device also is provided with spray water heater, not only efficiency of dust collection height, good dedusting effect, and can make it the flue gas recirculation utilization.
For achieving the above object, technical essential of the present invention is in the dust arrester system, before spray deduster a dust separator and smoke circulating device is set again, and is provided with spray water heater.Set dust separator, can remove soot dust granule big slightly in the flue gas earlier, alleviated the load of spray deduster, the spray water heater of She Zhiing simultaneously, can heat the shower water of normal temperature, and smoke circulating device can make the part of boiler smoke can cycling and reutilization, has so not only improved efficiency of dust collection and dust removing effects, has also improved the ability of boiler.
Boiler smoke two-stage dust removal of the present invention and smoke circulating device are made up of economizer, first order decanter type dust separator, spray water heater, second level spray deduster, steam-water separator, exhaust blower and smoke circulating device etc.
Said first order decanter type dust separator places on the second level spray deduster flue before, the housing of its separator is that top is that cylindrical, bottom is truncate conical metal cabinet, and casing is built-in with flue gas and enters pipe and smoke outlet tube and circulating flue gas outlet.The flue gas that enters separator is vorticla motion in its space, flow velocity slows down, and the flue dust of larger particles can drop to the bottom of separator in the flue gas, can reach the purpose of removing the part flue dust earlier.
Said spray water heater places the smoke outlet tube of first order decanter type dust separator, one metal sleeve in going out pipe, flue gas is arranged, the staggered metal tube that intersects that is connected with the formed gap of inside and outside tube is arranged on the inner core of sleeve, after normal-temperature water can be heated naturally by the heat in the flue gas when gap by sleeve and metal tube, enter spray deduster again, use as shower water.
Said smoke circulating device comprises connecting boiler and the circulating flue gas pipeline that is connected first order decanter type dust separator by the circulating flue gas outlet, and the air-introduced machine on the circulating flue gas pipeline, air duct, air-condition plate, circulating flue gas adjustable plate.Under the effect of air-introduced machine, a part that enters the flue gas of first order decanter type dust separator can enter boiler bottom by the circulating flue gas pipeline, regulates the control amount of circulating gas by the circulating flue gas adjustable plate, regulates the control air capacity by air-condition plate.
Below in conjunction with accompanying drawing, boiler two-stage dust removal of the present invention and smoke circulating device are done to be described in detail:
Boiler two-stage dust removal of the present invention and smoke circulating device are made up of economizer (2), first order decanter type dust separator (3), spray water heater (21), second level spray deduster (4), steam-water separator (5), exhaust blower (6) and smoke circulating device etc.
First order decanter type dust separator (3) places on second level spray deduster (4) flue before, the housing of its separator is that top is cylindrical, the bottom is a truncate conical metal cabinet (14), top in the casing (14) is equipped with flue gas and enters pipe (15), the end that flue gas enters pipe (15) is positioned at the center line of casing (14), the other end stretches out outside the casing (14), and be connected with the flue of front end by the flange on it (17), there is a smoke outlet tube (18) below that flue gas enters pipe (15), and circulating flue gas outlet (16) is gone up and be provided with to casing (14), dust exhausting hole (23) and manhole (25).
Spray water heater (21) places in the smoke outlet tube (18) of first order decanter type dust separator (3), its heater (21) is a metal sleeve (20), the crack forms closed state at both ends between its inside and outside tube, what have on the inner core of sleeve (20) that the gap that forms with inside and outside tube is connected intersects staggered metal tube (22), the below of metal sleeve one end connects water inlet pipe (24), and the top of the other end connects outlet pipe (19).
Smoke circulating device comprises and connects boiler (1) and export the circulating flue gas pipeline (13) that (16) are connected first order decanter type dust separator (3) by circulating flue gas, and the air-condition plate (11) on the air-introduced machine (8) on the circulating flue gas pipeline (13), oxygen meter (9), air duct (10), circulating flue gas adjustable plate (12) and the air duct (10).
Air-condition plate (11), circulating flue gas adjustable plate (12) be a circle, its diameter is less than the metallic plate (30) of circulating flue gas pipeline (13) and air duct (10) diameter, metallic plate (30) upper edge center line is fixed a metal bar (26), two symmetrical up and down circular holes on circulating flue gas pipeline (13) wall and air duct (10) wall are passed at the two ends of metal bar (26), and its metallic plate (30) is placed in pipeline (10), (13); The upper end of metal bar (26) is one handle bar (29) fixedly, and the below, end of handlebar (29) has a small column, top that one handle (28) is arranged; Below handlebar (29), passing metal bar (26) has a fan-shaped fixed disk (27) to be fixed in vertical direction on the outer wall of pipeline (10), (13) with metal bar (26), and there is 7-9 small sircle hole at the edge of fixed disk (27) upper edge circular arc.
Description of drawings:
Fig. 1: schematic diagram of the present invention
Fig. 2: the front view of first order decanter type dust separator
Fig. 3: the left side view of first order decanter type dust separator
Fig. 4: the structural representation of air-condition plate and circulating flue gas adjustable plate
Fig. 5: the A in the accompanying drawing 1 is to view
The dedusting and the flue gas recirculation process of boiler two-stage dust removal of the present invention and smoke circulating device are as follows:
Under the effect of exhaust blower (6), the flue gas that contains flue dust from boiler (1) discharge, via flue, economizer (2), flue gas enters pipe (15) and enters first order decanter type dust separator (3), flue gas is the vorticity motion in the space of separator (3), flow velocity slows down, soot dust granule in the flue gas drops to the bottom of casing (14) owing to self gravity, therefore remove a part of soot dust granule via the flue gas of separator (3) with regard to separating, not only alleviate the load of second level spray deduster (4), also correspondingly improved efficiency of dust collection and dust removing effects simultaneously.
Spray water heater (21) is arranged in the smoke outlet tube (18) of first order decanter type dust separator (3), water is when sleeve by heater and staggered metal tube (22), naturally heated through the heat in the flue gas of smoke outlet tube (18) and heater (21), hot water enters second level spray deduster (4) via outlet pipe (19), hot water is the spray state and contacts with the flue gas that enters deduster (4), because the temperature of shower water can reach 80～90 ℃, shower water under this temperature from top to bottom with moving flue gas from bottom to top in flue dust fully contact, and collision mutually, what the particle diameter of flue dust increased speeds up, the speed that weight increases is also accelerated, thereby increased the sinking speed of flue dust, the hot water that has higher temperature has simultaneously increased the solubility for small dust again, also can the very small dust of Ex-all particle, all be significantly improved with efficiency of dust collection and the dust removing effects of normal-temperature water than general normal as the deduster of shower water.Again via steam-water separator (5), exhaust blower (6), chimney (7), be discharged into aerial through the flue gas behind the two-stage dust removal.
The smoke circulating device that the present invention is set, can recycle the bottom of getting back to boiler (1) to partial fume, this is because the volume space of first order decanter type smoke separator (3) is bigger, the flow velocity that enters the flue gas of separator (3) slows down immediately, pressure reduces, under the effect of air-introduced machine (8), thereby for flue gas can be sucked out the condition created by the outlet of the circulating flue gas on the separator (3) (16), so separator (3) also is the effect of having played slow pressure.During flue gas recirculation, at first start air-introduced machine (8), when the suction of adjusting air-introduced machine (8) during more than or equal to pipe fluid pressure, flue gas just is inhaled in the circulating flue gas pipeline (13), and control the adjustment amount of circulating gas with circulating flue gas adjustable plate (12), adjust air capacity with air-condition plate (11) control, angle with handle (28) moving metal plate (30), in the small sircle hole on the small column insertion fixed disk (27) of below, handlebar (29) end, just metallic plate (30) can be fixed to needed angle.After mixing, the flue gas of circulation and the air that replenishes enter the bottom of boiler (1) at last.
If in the flue gas recirculation process, if the oxygen in the control adjustment circulating flue gas is more than or equal to 17%, amount of circulating gas is 40% of an exhaust gas volumn, general boiler hearth temperature can improve about 100 ℃, and promoted coal rapidly completing combustion at high temperature, under the situation that the consumption of coal does not increase, can provide boiler output 10～20%; Flue dust in the partial fume enters boiler again simultaneously, because the effect of material bed purifies and separates, has reduced the fume amount in the boiler smoke; Noise in the time of can also making the air-introduced machine running reduces by 20 decibels (BA).
Use boiler two-stage dust removal of the present invention and smoke circulating device, smoke dust discharge concentration can reach 200mg/NM
3Below, lingemann blackness can reach the 0-1 level.
Boiler two-stage dust removal of the present invention and smoke circulating device have the following advantages:
1, owing to adopted two-stage dust removal, and is provided with spray water heater, improved efficiency of dust collection and dust removing effects.
2, because flue gas can be recycling, promote the abundant burning of coal, improved the temperature of burner hearth, can increase boiler output, reduced the consumption of coal.
3, not being only applicable to coal-burning boiler, also being applicable to coal-fired furnace, is more satisfactory dedusting and flue gas recirculation use device.
Claims (4)
1, a kind of boiler smoke two-stage dust removal and smoke circulating device comprise economizer (2), spray deduster (4), steam-water separator (5), exhaust blower (6) etc., it is characterized in that:
A: be provided with first order decanter type dust separator (3) in the front portion of first order spray deduster (4);
B: be provided with spray water heater (21);
C: smoke circulating device comprises and connects boiler (1) and export the circulating flue gas pipeline (13) that (16) are connected first order decanter type dust separator (3) by circulating flue gas, and the air-condition plate (11) on the air-introduced machine (8) on the circulating flue gas pipeline (13), oxygen meter (9), air duct (10), circulating flue gas adjustable plate (12) and the air duct (10).
2, boiler smoke two-stage dust removal according to claim 1 and smoke circulating device, it is characterized in that: first order decanter type dust separator (3) places on second level spray deduster (4) flue before, the housing of its separator is that top is cylindrical, the bottom is a truncate conical metal cabinet (14), top in the casing (14) is equipped with flue gas and enters pipe (15), the end that flue gas enters pipe (15) is positioned at the center line of casing (14), the other end stretches out outside the casing (14), and is connected with the flue of front end by the flange on it (17); There is a smoke outlet tube (18) below that flue gas enters pipe (15), and circulating flue gas outlet (16), dust exhausting hole (23) and manhole (25) are gone up and be provided with to casing (14).
3, boiler smoke two-stage dust removal according to claim 1 and 2 and smoke circulating device, it is characterized in that set spray water heater (21) places in the smoke outlet tube (18) of first order decanter type smoke separator (3), its heater (21) is a metal sleeve (20), in it, the crack forms closed state at its both ends between the urceolus, have on the inner core of sleeve (20) with in, the metal tube (22) that the intersection that the gap of urceolus is connected is staggered, the below of metal sleeve (20) one ends connects water inlet pipe (24), and the top of the other end connects outlet pipe (19).
4, boiler two-stage dust removal according to claim 1 and smoke circulating device, it is characterized in that air-condition plate (11) and circulating flue gas adjustable plate (12) be a circle, its diameter is less than the metallic plate (30) of circulating flue gas pipeline (13) and air duct (10) diameter, metallic plate (30) upper edge center line is fixed a metal bar (26), two symmetrical up and down circular holes on circulating flue gas pipeline (13) wall and air duct (10) wall are passed at metal bar two ends (26), and its metallic plate (30) is placed in pipeline (10), (13); The upper end of metal bar (26) is one handle bar (29) fixedly, and the below, end of handlebar (29) has a roundlet to live, and there is one handle (28) top; Below handlebar (29), passing metal bar (26) has a fan-shaped fixed disk (27) to be fixed in vertical direction on the outer wall of pipeline (10), (13) with metal bar (26), and there is 7-9 small sircle hole at the edge of fixed disk (27) upper edge circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111628 CN1062200A (en) | 1991-12-25 | 1991-12-25 | Boiler smoke two-stage dust removal and smoke circulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111628 CN1062200A (en) | 1991-12-25 | 1991-12-25 | Boiler smoke two-stage dust removal and smoke circulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1062200A true CN1062200A (en) | 1992-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111628 Pending CN1062200A (en) | 1991-12-25 | 1991-12-25 | Boiler smoke two-stage dust removal and smoke circulating device |
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| Country | Link |
|---|---|
| CN (1) | CN1062200A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563159A (en) * | 2010-12-30 | 2012-07-11 | 北大方正集团有限公司 | Flow control device, coke-oven dust removing system and control method for flow of flowable substance |
| CN103807864A (en) * | 2013-11-30 | 2014-05-21 | 信宜市伟昌纸品厂有限公司 | Environment-friendly boiler |
| CN107335315A (en) * | 2017-01-20 | 2017-11-10 | 上海安赐环保科技股份有限公司 | A kind of salkali waste incineration tail gas processing system and its technique |
| CN112090119A (en) * | 2020-09-29 | 2020-12-18 | 云南农业大学 | Distributed multi-cyclone gas-water separation recycling device for tea fermentation |
-
1991
- 1991-12-25 CN CN 91111628 patent/CN1062200A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563159A (en) * | 2010-12-30 | 2012-07-11 | 北大方正集团有限公司 | Flow control device, coke-oven dust removing system and control method for flow of flowable substance |
| CN103807864A (en) * | 2013-11-30 | 2014-05-21 | 信宜市伟昌纸品厂有限公司 | Environment-friendly boiler |
| CN103807864B (en) * | 2013-11-30 | 2016-06-22 | 信宜市伟昌纸品厂有限公司 | Environment-protection boiler |
| CN107335315A (en) * | 2017-01-20 | 2017-11-10 | 上海安赐环保科技股份有限公司 | A kind of salkali waste incineration tail gas processing system and its technique |
| CN112090119A (en) * | 2020-09-29 | 2020-12-18 | 云南农业大学 | Distributed multi-cyclone gas-water separation recycling device for tea fermentation |
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| WD01 | Invention patent application deemed withdrawn after publication |