CN212091423U - Bagasse boiler flue gas dust removal denitrification facility - Google Patents
Bagasse boiler flue gas dust removal denitrification facility Download PDFInfo
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- CN212091423U CN212091423U CN202020454178.4U CN202020454178U CN212091423U CN 212091423 U CN212091423 U CN 212091423U CN 202020454178 U CN202020454178 U CN 202020454178U CN 212091423 U CN212091423 U CN 212091423U
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Abstract
The utility model provides a bagasse boiler flue gas dust removal denitrification facility, include the internal recycle jetting sack cleaner that is connected with bagasse boiler body exhanst gas outlet and with the denitration reactor that internal recycle jetting sack cleaner is connected, be equipped with N type flame arrester on the pipeline that bagasse boiler and internal recycle jetting sack cleaner are connected, be equipped with the vortex divertor in the denitration reactor, the denitration reactor will be through in the flue gas discharge wind chamber after the denitration, be equipped with first export and second export on the wind chamber, first export jets to the internal recycle jetting sack cleaner through internal recycle jetting fan system with the flue gas through purifying in the wind chamber, the second export is connected with the air preheater in the bagasse boiler, the export of air preheater is connected with the chimney. The utility model discloses utilize and set up the N type fire damper who is used for collecting mars before the inner loop jetting sack cleaner, can prevent effectively that the lime-ash that does not burn to the greatest extent from entering the inner loop jetting sack cleaner, prevent to burn the bag, guarantee the operation of dust collecting facility safety and stability.
Description
Technical Field
The utility model relates to a bagasse boiler flue gas dust removal denitration technique especially relates to a bagasse boiler flue gas dust removal denitration device.
Background
The bagasse boiler is mainly distributed in sugar mills in southern regions such as Guangxi, Yunnan, Guangdong and Hainan, bagasse, bark and the like are used as boiler biomass energy, the energy characteristics of the bagasse boiler are renewability, low pollution and rich total amount, wherein the moisture of bagasse biofuel is 50-55%, the sediment content is about 1%, and the distribution fluctuation of fuel calorific value is large, so that the flue gas of the bagasse boiler has the following characteristics:
1. based on the reasons of fuel components, the moisture content of the flue gas is particularly high and can reach about 40 percent at most (within 10 percent of a far-overfire coal boiler);
2. the smoke dust amount of the smoke is large, generally 2000-3000 mg/m3The dust with fine particle size has large proportion and large specific resistance, and the potassium-sodium alkali metal salt (K) in the dust2SO4、Na2SO4、KCl、NaCl、K2CO3、Na2CO3) The content is higher (3-7%);
3、SO2very low concentrations (typically to emission standards); NOx generated by combustion of the bagasse boiler is mainly fuel type NOx generated by combustion of organic nitrogen in fuel, the concentration of the NOx is low, and according to relevant boiler survey data, the concentration of the fuel type NOx generated after combustion of the bagasse fuel doped with bark is 200-400 mg/m3Fluctuate between;
4. the temperature difference fluctuation in the bagasse boiler is large, and the temperature of a hearth ranges from 700 ℃ to 1100 ℃; bagasse can not be completely combusted in the furnace, larger dust in flue gas can keep combustion temperature due to short heat exchange time, although the flue gas has low oxygen content and can not be combusted again, once the oxygen condition is met, secondary deflagration is easy to occur; the ash content after combustion contains substances such as tar and the like, and if the temperature is reduced, coking phenomenon can be generated to cause blockage, so that the exhaust gas temperature at the outlet of the currently operated boiler economizer can reach 300-350 DEG C
Due to the characteristics of the flue gas of the bagasse boiler, the conventional wet dust removal and denitration and the conventional dry dust removal and denitration treatment process in China at present hardly meet increasingly strict environmental requirements, and meanwhile, environmental protection facilities are high in failure rate and hardly run safely and stably.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, overcome the defect that prior art exists, provide a bagasse boiler flue gas dust removal denitrification facility that the fault rate is low, can long-time safety and stability move.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a bagasse boiler flue gas dust removal denitrification facility, include the inner loop jetting sack cleaner that is connected with bagasse boiler body exhanst gas outlet and with the denitration reactor that inner loop jetting sack cleaner is connected, be equipped with N type flame arrester on the pipeline that inner loop jetting sack cleaner and bagasse boiler body exhanst gas outlet are connected, be equipped with the vortex divertor in the denitration reactor, the flue gas after the denitration reactor will pass through the denitration is discharged into in the wind chamber, be equipped with first export and second export on the wind chamber, first export jets the flue gas through inner loop jetting fan system after purifying in the wind chamber to in the inner loop jetting sack cleaner, the second export is connected with the air preheater in the bagasse boiler, the export of air preheater is connected with the chimney.
Further, the internal circulation blowing fan system comprises an internal circulation blowing high-pressure fan, an inlet air valve and a pressure regulating valve, the internal circulation blowing high-pressure fan is used for blowing purified flue gas in the air cavity into the internal circulation blowing bag-type dust remover again, the inlet air valve is arranged at the end, close to the air cavity, of the internal circulation blowing high-pressure fan, and the pressure regulating valve is arranged on a pipeline, connected with the internal circulation blowing bag-type dust remover, of the internal circulation blowing high-pressure fan.
Further, be equipped with N type metal filter screen in the N type fire extinguisher, N type metal filter screen divides N type fire extinguisher into two first cavities and the second cavity that are used for collecting the spark.
Further, first cavity is located the top of second cavity, the lower part of N type flame arrester is equipped with collects the ash bucket, be equipped with the dust discharge valve on collecting the ash bucket.
Further, a lower ash hopper on the inner circulation blowing bag-type dust collector is connected with the embedded scraper conveyer, and a discharge valve is arranged between the lower ash hopper and the embedded scraper conveyer.
Further, a draught fan is arranged on a pipeline, connected with the chimney, of the air preheater, one end of the draught fan is provided with a draught fan inlet flue gas baffle, and the other end of the draught fan is provided with a draught fan outlet valve.
Further, the denitration reactor is connected with a denitration powder injection system.
Further, the bagasse boiler is provided with a secondary fan, and the secondary fan is connected with the air preheater.
Furthermore, the air preheater is connected with a warm air blower, one end of the warm air blower, which is close to the air preheater, is provided with an adjusting air valve, and the other end of the warm air blower is provided with an air supply valve.
Compared with the prior art, the N-shaped flame arrester for collecting sparks is arranged in front of the internal circulation blowing bag-type dust remover, so that unburned ash can be effectively prevented from entering the internal circulation blowing bag-type dust remover, bags are prevented from being burnt, and the safe and stable operation of a dust removal facility is ensured; the purified flue gas is re-sprayed to the internal circulation spraying bag-type dust remover by adopting an internal circulation spraying and blowing mode, so that the stability of air components in the bag-type dust remover is ensured, particularly the lower oxygen content of the flue gas in the internal circulation spraying bag-type dust remover is maintained, the increase of local oxygen content caused by spraying and blowing other air is prevented, secondary combustion of smoke dust in the flue gas is prevented, bag burning and bag pasting phenomena are avoided, and the safe and stable operation of facilities is ensured; meanwhile, the operation and maintenance cost of the dust remover is reduced; a vortex flow guider is arranged in the denitration reactor, so that the denitration efficiency is high; the denitration reactor is connected with the denitration powder injection system, and denitration is carried out in a non-toxic, non-irritant, non-corrosive, non-combustible and non-explosive state and is safe and reliable in storage and transportation; the dry powder can also properly reduce the humidity of the flue gas, and compared with other denitration modes, the flue gas humidity is greatly reduced, so that the high-altitude emission of the flue gas is facilitated; the utility model discloses whole flue gas dust removal denitrification facility operation safety, stability, high efficiency, environmental protection, energy-conservation, it is little to the corrosivity of system.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of the N-type flame arrester of FIG. 1;
FIG. 3 is a schematic structural diagram of the eddy current denitration reactor in FIG. 1;
fig. 4 is a schematic structural view of the denitration powder injection system in fig. 1.
In the figure: 1. bagasse boiler body, 2, primary economizer, 3, secondary economizer, 4, N-type flame arrester, 5, ash unloading valve, 6, internal circulation blowing bag-type dust collector, 7, discharge valve, 8, buried scraper conveyor, 9, internal circulation blowing high-pressure fan, 10, inlet air valve, 11, pressure regulating valve, 12, vortex denitration reactor, 13, air cavity, 14, air preheater, 15, secondary fan, 16, warm air blower, 17, air supply valve, 18, regulating air valve, 19, draught fan, 20, draught fan inlet flue gas baffle, 21, draught fan outlet valve, 22, chimney, 23, denitration agent powder bin, 24, metering distributor, 25, gasification jet pump, 26, flow regulating device, 27, blowing and blocking device, 28, power gas storage tank, 29, tee pipe valve, 30, flow regulating valve, 31, vortex flow guider, 32, collecting ash bucket, 33, lower ash bucket, 131. first outlet, 132, second outlet, 401, first cavity, 402, second cavity.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the present embodiment includes an internal circulation blowing bag-type dust collector 6 connected to a flue gas outlet of a bagasse boiler body 1, and a vortex denitration reactor 12 connected to the internal circulation blowing bag-type dust collector 6, wherein an N-shaped flame arrester 4 is disposed on a pipeline of the internal circulation blowing bag-type dust collector 6 connected to the flue gas outlet of the bagasse boiler body 1, a vortex flow director 31 is disposed in the vortex denitration reactor 12, an outlet of the vortex denitration reactor 12 is connected to an air chamber 13, the vortex denitration reactor 12 discharges denitrated flue gas into the air chamber 13, the air chamber 13 is provided with a first outlet 131 and a second outlet 132, the first outlet 131 blows purified flue gas in the air chamber 13 into the internal circulation blowing bag-type dust collector 6 through an internal circulation blowing fan system, and the second outlet 132 is connected to an air preheater 14 in the bagasse boiler 1, the export of air preheater 14 is connected with chimney 22, is equipped with draught fan 19 on the pipeline that air preheater and chimney are connected, the one end of draught fan 19 is equipped with draught fan entry flue gas baffle 20, and its other end is equipped with draught fan outlet valve 21. Bagasse boiler body 1 is equipped with overgrate air entry and supporting overfire air fan 15, and overfire air fan 15 is connected with air preheater 14, and bagasse boiler body 1's afterbody sets up one-level economizer 2 and second grade economizer 3, and the export of second grade economizer 3 links to each other with N type fire damper 4, is equipped with N type metal filter in the N type fire damper 4, and N type metal filter divides N type fire damper 4 into two first cavities 401 and the second cavity 402 that are used for collecting mars, N type fire damper 4 is used for the entrapment mars, and effectual unburned lime-ash of prevention enters inner loop jetting sack cleaner 6, prevents to burn the bag, first cavity 401 is located the top of second cavity 402, N type fire damper 4's lower part is equipped with collects ash hopper 32, be equipped with unloading valve 5 on the collection ash hopper 32.
The internal circulation blowing fan system comprises an internal circulation blowing high-pressure fan 9, an inlet air valve 10 and a pressure regulating valve 11, wherein the internal circulation blowing high-pressure fan 9 is used for re-blowing purified flue gas in an air cavity 13 into the internal circulation blowing bag-type dust remover 6, the inlet air valve 10 is arranged at the end, close to the air cavity 13, of the internal circulation blowing high-pressure fan 9, and the pressure regulating valve 11 is arranged on a pipeline, connected with the internal circulation blowing bag-type dust remover 6, of the internal circulation blowing high-pressure fan 9.
In this embodiment, the lower ash hopper 33 of the internal circulation blowing bag dust collector 6 is connected with the embedded scraper conveyor 8, and the discharge valve 7 is arranged between the lower ash hopper 33 and the embedded scraper conveyor 8.
In the embodiment, flue gas after being collected by mars enters the internal circulation blowing bag-type dust collector 6, the internal circulation blowing bag-type dust collector 6 adopts a static internal circulation blowing mode, namely, low-oxygen air after dust removal is adopted as blowing gas, the blowing gas amount adopts about 5-15% of flue gas amount purified by system treatment, low-pressure compartment intermittent blowing is carried out, the pressure is 6000-9000 Pa, the stability of components of the air in the bag is ensured, especially, the lower oxygen content of the flue gas in the internal circulation blowing bag-type dust collector 6 is maintained, the increase of local oxygen content caused by other air blowing is prevented, secondary combustion of smoke dust in the flue gas is avoided, bag burning and bag pasting are avoided, the safety and stability of facility operation are ensured, and meanwhile, the operation and maintenance cost is reduced. Meanwhile, disturbance ash removal is filled through the change of large-air-volume blowing, so that the instant impact of conventional high-pressure air on the internal circulation blowing bag-type dust remover is reduced, and the service life of the internal circulation blowing bag-type dust remover is prolonged. The lower ash bucket 33 on the internal circulation blowing bag-type dust collector 6 is connected with the embedded scraper conveyor 8, and ash is conveyed by adopting an embedded scraper conveying mode. The internal circulation blowing fan system is connected with the air cavity 13 and the internal circulation blowing bag-type dust remover 6, so that the dust cleaning effect and the bag dust cleaning safety are ensured.
In the embodiment, a special low-temperature high-humidity vortex plate-type denitration catalyst is arranged in the vortex denitration reactor 12, a plurality of inorganic and organic composite denitration powders enter the vortex denitration reactor 12 through a denitration powder spraying system, the dry powders and flue gas are subjected to catalytic reaction, a vortex flow guider 31 is arranged at the inlet of the vortex denitration reactor 12, the mixed reaction effect of the flue gas and denitration is enhanced, dust accumulation in the operation process of the catalyst is reduced, and the operation efficiency of the catalyst is improved; by setting the height and the number of layers of the denitration catalyst bed and the proportion of the price-adjusting powder, the NOx removal rate is more than or equal to 90 percent, the NOx concentration is less than or equal to 40mg/m3, and the utilization rate of a denitration agent system is more than or equal to 98 percent. Meanwhile, the humidity of the flue gas is reduced, and the flue gas is favorably emptied.
As shown in fig. 4, the denitration powder injection system includes a denitration agent powder bin 23, a metering distributor 24, a gasification jet pump 25, a flow regulating device 26, a blowing and blocking device 27 and a power gas storage tank 28, and is connected with the eddy current denitration reactor 12 through a three-way pipeline 29, and each pipeline on the three-way pipeline 29 is provided with a flow regulating valve 30.
In this embodiment, the air chamber 13 is connected with the internal circulation blowing high pressure fan 9 to provide internal circulation blowing air for the internal circulation blowing bag-type dust collector 6, thereby ensuring the stability of the air pressure of the system.
In this embodiment, the air preheater 14 is connected to a warm air blower 16 and a secondary air blower 15 to provide secondary warm air for the boiler, so as to comprehensively utilize heat energy.
In this embodiment, the draught fan inlet is equipped with entry flue gas baffle 20, and the draught fan export sets up draught fan export governing valve 21 and adjusts the balance of the system wind system.
Various modifications and variations of the present invention may be made by those skilled in the art, and they are within the scope of the present invention provided they are within the scope of the claims and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (15)
1. The utility model provides a bagasse boiler flue gas dust removal denitrification facility, include the inner loop jetting sack cleaner that is connected with bagasse boiler body exhanst gas outlet and with the denitration reactor that the inner loop jetting sack cleaner is connected, its characterized in that: the flue gas denitration device is characterized in that an N-type flame arrester is arranged on a pipeline connecting the internal circulation blowing bag-type dust remover with a flue gas outlet of a bagasse boiler body, a vortex flow guider is arranged in the denitration reactor, the denitration reactor discharges the denitrated flue gas into an air cavity, a first outlet and a second outlet are arranged on the air cavity, the first outlet blows the purified flue gas in the air cavity into the internal circulation blowing bag-type dust remover through an internal circulation blowing fan system, the second outlet is connected with an air preheater in the bagasse boiler, and the outlet of the air preheater is connected with a chimney.
2. The bagasse boiler flue gas dedusting and denitration device according to claim 1, characterized in that: the internal circulation blowing fan system comprises an internal circulation blowing high-pressure fan, an inlet air valve and a pressure regulating valve, wherein the internal circulation blowing high-pressure fan is used for blowing purified smoke in an air cavity into the internal circulation blowing bag-type dust remover again, the inlet air valve is arranged at the end, close to the air cavity, of the internal circulation blowing high-pressure fan, and the pressure regulating valve is arranged on a pipeline, connected with the internal circulation blowing bag-type dust remover, of the internal circulation blowing high-pressure fan.
3. The bagasse boiler flue gas dedusting and denitration device according to claim 1 or 2, characterized in that: the N-type fire damper is characterized in that an N-type metal filter screen is arranged in the N-type fire damper, and the N-type metal filter screen divides the N-type fire damper into a first cavity and a second cavity which are used for collecting sparks.
4. The bagasse boiler flue gas dedusting and denitration device according to claim 3, characterized in that: the first cavity is located above the second cavity, the lower portion of the N-type fire damper is provided with a collecting ash bucket, and an ash discharging valve is arranged on the collecting ash bucket.
5. The bagasse boiler flue gas dedusting and denitration device according to claim 1 or 2, characterized in that: and a lower ash hopper on the internal circulation blowing bag-type dust collector is connected with the embedded scraper conveyer, and a discharge valve is arranged between the lower ash hopper and the embedded scraper conveyer.
6. The bagasse boiler flue gas dedusting and denitration device according to claim 1 or 2, characterized in that: and a draught fan is arranged on a pipeline of the air preheater connected with the chimney, one end of the draught fan is provided with a draught fan inlet flue gas baffle, and the other end of the draught fan is provided with a draught fan outlet valve.
7. The bagasse boiler flue gas dedusting and denitration device according to claim 3, characterized in that: and a draught fan is arranged on a pipeline of the air preheater connected with the chimney, one end of the draught fan is provided with a draught fan inlet flue gas baffle, and the other end of the draught fan is provided with a draught fan outlet valve.
8. The bagasse boiler flue gas dedusting and denitration device according to claim 4, characterized in that: and a draught fan is arranged on a pipeline of the air preheater connected with the chimney, one end of the draught fan is provided with a draught fan inlet flue gas baffle, and the other end of the draught fan is provided with a draught fan outlet valve.
9. The bagasse boiler flue gas dedusting and denitration device according to claim 5, characterized in that: and a draught fan is arranged on a pipeline of the air preheater connected with the chimney, one end of the draught fan is provided with a draught fan inlet flue gas baffle, and the other end of the draught fan is provided with a draught fan outlet valve.
10. The bagasse boiler flue gas dedusting and denitration device according to claim 1 or 2, characterized in that: the denitration reactor is connected with a denitration powder injection system.
11. The bagasse boiler flue gas dedusting and denitration device according to claim 3, characterized in that: the denitration reactor is connected with a denitration powder injection system.
12. The bagasse boiler flue gas dedusting and denitration device according to claim 1 or 2, characterized in that: and the bagasse boiler is provided with a secondary fan, and the secondary fan is connected with the air preheater.
13. The bagasse boiler flue gas dedusting and denitration device according to claim 3, characterized in that: and the bagasse boiler is provided with a secondary fan, and the secondary fan is connected with the air preheater.
14. The bagasse boiler flue gas dedusting and denitration device according to claim 1 or 2, characterized in that: the air preheater is connected with a warm air blower, one end of the warm air blower, which is close to the air preheater, is provided with an adjusting air valve, and the other end of the warm air blower is provided with an air supply valve.
15. The bagasse boiler flue gas dedusting and denitration device according to claim 3, characterized in that: the air preheater is connected with a warm air blower, one end of the warm air blower, which is close to the air preheater, is provided with an adjusting air valve, and the other end of the warm air blower is provided with an air supply valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020454178.4U CN212091423U (en) | 2020-04-01 | 2020-04-01 | Bagasse boiler flue gas dust removal denitrification facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020454178.4U CN212091423U (en) | 2020-04-01 | 2020-04-01 | Bagasse boiler flue gas dust removal denitrification facility |
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| Publication Number | Publication Date |
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| CN212091423U true CN212091423U (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020454178.4U Active CN212091423U (en) | 2020-04-01 | 2020-04-01 | Bagasse boiler flue gas dust removal denitrification facility |
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| CN (1) | CN212091423U (en) |
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2020
- 2020-04-01 CN CN202020454178.4U patent/CN212091423U/en active Active
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