CN210601588U - Can effectively improve furfural sediment boiler deNOx systems of denitration efficiency - Google Patents
Can effectively improve furfural sediment boiler deNOx systems of denitration efficiency Download PDFInfo
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- CN210601588U CN210601588U CN201921258479.3U CN201921258479U CN210601588U CN 210601588 U CN210601588 U CN 210601588U CN 201921258479 U CN201921258479 U CN 201921258479U CN 210601588 U CN210601588 U CN 210601588U
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Abstract
The utility model discloses a can effectively improve furfural sediment boiler deNOx systems of denitration efficiency, including blanking funnel, boiler material loading belt feeder, boiler, spraying purification tower, ammonia tank and control box, the blanking funnel sets up on the transmission initial end upper portion of boiler material loading belt feeder, and the transmission end and the boiler pan feeding end of boiler material loading belt feeder are connected, and the pipe of discharging fume is installed to the upper end of boiler. The utility model discloses an experimental adjustment of a overgrate air ratio and other furnace conditions's adjustment, improve denitration efficiency, after a series of measures such as adjustment of burning through adding the inert, finally realized online NOx's ultralow emission, reach below 30mg/nm, stir through increasing inert material and scraper, accomplish partial denitration ammonia nitrogen reaction in earlier stage, when the denitration workshop section, through the repetition test, also reduce to 150 titers by 210 titers in the use of aqueous ammonia, greatly reduced the cost, SO2 has also reduced to ultralow emission standard in the flue gas simultaneously, the cost such as desulfurized calcium oxide has been saved.
Description
Technical Field
The utility model relates to an exhaust-gas treatment technical field specifically is a furfural sediment boiler deNOx systems that can effectively improve denitration efficiency.
Background
The furfural residues are solid wastes left after hydrolysis of corncobs by adding sulfuric acid, the furfural residues are wastes generated in the biomass hydrolysis process, the salt content of the furfural residues is high, the furfural residues are acidic, and a large amount of furfural residues accumulated can pollute the atmosphere, soil and rivers, so the furfural residues are mostly subjected to combustion treatment in the prior art.
However, the prior art has the following disadvantages:
1. the existing furfural residues have high humidity, the load of a direct combustion boiler is high, the furfural residues are easy to bond, the boiler is easy to be unstable through combustion, and a flue is easy to block.
2. The existing furfural residues are solid wastes left after hydrolysis of corncobs by adding sulfuric acid, the furfural residues contain partial sulfuric acid, the emission concentration of sulfur dioxide is high after combustion of the furfural residues, the emission concentration can not reach below 35mg/m, and the index requirement of online ultralow emission of flue gas can not be met.
3. The furfural residue is directly combusted, so that the water content in the flue gas is higher due to the fact that the water content of the furfural residue is higher, when ammonia water is sprayed in a denitration system, the ammonia water titer requirement index is higher, but the ammonia water can not completely react after being contacted with the water content, the waste of the ammonia water is caused, and meanwhile, the content of nitrogen oxides in the flue gas is higher, so that the requirement for environment protection 50mg/m cultivation can not be met.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a can effectively improve furfural residue boiler deNOx systems of denitration efficiency has solved furfural residue burning denitration inefficiency, discharges fume the problem that can't reach the technique of environmental protection requirement.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: a furfural residue boiler denitration system capable of effectively improving denitration efficiency comprises a blanking funnel, a boiler feeding belt conveyor, a boiler, a spray purification tower, an ammonia tank and a control box, wherein the blanking funnel is arranged on the upper portion of the transmission initial end of the boiler feeding belt conveyor, the transmission tail end of the boiler feeding belt conveyor is connected with the boiler feeding end, a smoke exhaust pipe is arranged at the upper end of the boiler, the other end of the smoke exhaust pipe is connected with the spray purification tower arranged on one side of the boiler, the ammonia tank is arranged on the other side of the spray purification tower, an ammonia water pipe is arranged between the ammonia tank and the spray purification tower, an ammonia water pump is arranged on the ammonia water pipe, a boiler ash stirring device and a limestone powder stirring device are sequentially arranged on the upper portion of the boiler feeding belt conveyor along the transmission direction of the boiler feeding belt conveyor, and each of the boiler ash stirring device and the limestone powder stirring device comprises a U-shaped stirring bin, supporting legs, a, Dial the material motor, dial charging tray and discharge gate, the bottom welding that the feed bin was dialled to the U type has the landing leg, the internally mounted that the feed bin was dialled to the U type has the live-rollers, it has the center pin to peg graft in the centre of live-rollers, the one end of center pin and the material motor shaft fixed connection of dialling in the U type feed bin outer end are dialled to the one end, the outer end equipartition of live-rollers is provided with dials the charging tray, the discharge gate has been seted up to the bottom that the feed bin was dialled to the U type, the bottom of boiler is connected with a fan, one side of boiler is connected with secondary air fan, the control box sets up the bottom at boiler material loading belt feeder.
Preferably, the spray purification tower comprises a tower body and a wet dust collector arranged inside the tower body.
Preferably, the first blast cap and the second blast cap are respectively arranged at the joints of the primary fan and the secondary fan in the boiler.
Preferably, the blanking funnel is internally provided with furfural residues and biomass fuel.
Preferably, the bottom of the boiler is provided with a fluidized bed at the upper part of the first hood.
Preferably, one end of the ammonia water pipe is inserted into the spray purification tower, and the ammonia water pipe inserted into the spray purification tower is provided with spray holes.
(III) advantageous effects
The utility model provides a can effectively improve furfural residue boiler deNOx systems of denitration efficiency possesses following beneficial effect:
(1) the utility model discloses an inert material who adds different proportions tests the influence to denitration efficiency, reaches best ratio through optimizing of fuel structure, air regulation's optimization, assurance of aqueous ammonia supply etc. and production load reaches full load, realizes that NOx discharges and reaches below 30mg/nm full-year, SO2 discharges 10-15mg/m and heaves, satisfies the national ultra-low emission standard.
(2) The utility model discloses an experimental adjustment of a overgrate air ratio etc. stove condition's adjustment improves denitration efficiency, through adding a series of initiatives such as inert combustion adjustment after, not only realize the flue gas ultralow emission, also reduce to 130 titers by 210 titers in addition in the use of aqueous ammonia, greatly reduced the cost, SO2 also falls to the emission concentration of 10-15mg/m year in the flue gas moreover, saved cost such as desulfurized calcium oxide.
(3) After the inert materials are mixed and burned in the boiler, the consumption of calcium oxide is saved, two circulating pumps are omitted in desulfurization, the ammonia water titer is reduced by combining denitration, the operation of four ammonia water pumps is omitted, and the production cost is saved.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of the internal structure of the spray purification tower of the present invention;
fig. 3 is a schematic view of the internal structure of the kick-out device of the present invention.
The reference numbers in the figures are: 1. a blanking funnel; 2. a boiler feeding belt conveyor; 3. a boiler; 4. a smoke exhaust pipe; 5. spraying a purification tower; 6. an ammonia tank; 7. a boiler ash kick-out device; 8. a limestone powder kick-out device; 9. a primary air fan; 10. a secondary air fan; 11. a sulfidizing bed; 12. a first hood; 13. a second hood; 14. a tower body; 15. a wet dust collector; 16. a U-shaped material shifting bin; 17. a support leg; 18. a rotating roller; 19. a central shaft; 20. a material stirring motor; 21. a material stirring disc; 22. a discharge port; 23. an ammonia water pipe; 24. an ammonia pump; 25. and a control box.
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.
As shown in fig. 1-3, the utility model provides a technical solution: a furfural slag boiler denitration system capable of effectively improving denitration efficiency comprises a blanking funnel 1, a boiler feeding belt machine 2, a boiler 3, a spray purification tower 5, an ammonia water tank 6 and a control box 25, wherein the blanking funnel 1 is arranged on the upper portion of the transmission initial end of the boiler feeding belt machine 2, the transmission tail end of the boiler feeding belt machine 2 is connected with the feeding end of the boiler 3, a smoke exhaust pipe 4 is installed at the upper end of the boiler 3, the other end of the smoke exhaust pipe 4 is connected with the spray purification tower 5 arranged on one side of the boiler 3, the ammonia water tank 6 is arranged on the other side of the spray purification tower 5, an ammonia water pipe 23 is installed between the ammonia water tank 6 and the spray purification tower 5, an ammonia water pump 24 is installed on the ammonia water pipe 23, a boiler ash stirring device 7 and a limestone powder stirring device 8 are sequentially arranged on the upper portion of the boiler feeding belt machine 2 along the transmission direction of the boiler feeding belt machine 2, and the boiler ash stirring device 7 and the limestone powder stirring device 8 both comprise U-shaped, The spraying purification tower comprises supporting legs 17, a rotating roller 18, a central shaft 19, a material stirring motor 20, a material stirring disc 21 and a discharge port 22, wherein the supporting legs 17 are welded at the bottom end of a U-shaped material stirring bin 16, the rotating roller 18 is installed inside the U-shaped material stirring bin 16, the central shaft 19 is inserted in the middle of the rotating roller 18, one end of the central shaft 19 is fixedly connected with a rotating shaft of the material stirring motor 20 installed at the outer end of the U-shaped material stirring bin 16, the material stirring disc 21 is equally arranged at the outer end of the rotating roller 18, the discharge port 22 is arranged at the bottom end of the U-shaped material stirring bin 16, a primary fan 9 is connected at the bottom of a boiler 3, a secondary fan 10 is connected at one side of the boiler 3, a control box 25 is arranged at the bottom of a boiler feeding belt machine 2, the control box 25 is respectively and electrically connected with a boiler ash stirring device 7, a lime stirring device 8, the primary fan 9, the secondary fan 10 and an ammonia water pump 24, the, the inside of boiler 3 is provided with first hood 12 and second hood 13 respectively with the primary air fan 9 and the junction of secondary air fan 10, is provided with furfural sediment and biomass fuel in the blanking funnel 1, and the bottom of boiler 3 is provided with fluidized bed 11 on the upper portion of first hood 12, and the inside of spray purification tower 5 is inserted to the one end of aqua ammonia pipe 23 to insert and to have seted up on the aqua ammonia pipe 23 of spray purification tower 5 inside and spray the hole.
Working principle; when the device is used, firstly, furfural residues and alkaline biomass fuel with the water content of less than 10 percent are added into a blanking funnel 1, the biomass fuel is preferably peanut shells, cotton flower stands and pepper branches, then furnace dust and limestone powder are respectively added into a boiler furnace dust kickoff 7 and a limestone powder kickoff 8 at the upper part of a boiler feeding belt conveyor 2, and then the biomass fuel, the furfural residues, the limestone powder and the furnace dust are subjected to a proportional adjustment test; calculating biomass fuel according to the shovel number of a forklift, calculating furfural residues according to the interval time of slag discharge, and calculating limestone powder and furnace ash according to the material stirring speed (based on the rotating speed of a motor) of a newly-added feeding port;
in the initial stage of the test, furfural residue: biomass fuel: limestone powder: furnace dust =20 min: 2, shoveling: 8 r/min: 20r/min, and the content of nitrogen oxides in flue gas of the boiler 3 can reach about 45mg/m through tests; when the test is carried out again, the proportion of each fuel component is adjusted according to the proportion of the furfural residues: biomass fuel: limestone powder: furnace dust =24 min: 3.5, shoveling: 12 r/min: 18r/min, and finally, the emission content of nitrogen oxides in the flue gas of the boiler 3 can reach below 40mg/m and is still unstable; finally, adjusting the proportion of the components fed into the boiler 3 of each boiler according to the proportion of the furfural residues: biomass fuel: limestone powder: furnace dust =26.7 min: 3, shoveling: 12 r/min: 24r/min, and finally realizing 30mg/m high and stable nitrogen oxide emission content in the flue gas of the boiler 3;
the biomass fuel is found to be insufficient during the test, the fluidization effect of the boiler 3 is not ideal, so the frequency of the primary fan 9 and the secondary fan 10 is adjusted to ensure complete combustion and good fluidization of the boiler 3, no caking and blockage are caused, the frequency of the primary fan 9 is increased from 39HZ to 50HZ, and the frequency of the secondary fan 10 is reduced from 45HZ to 39HZ, so that the purposes of complete combustion of the boiler 3 and standard emission of the smoke are realized.
To sum up, the utility model discloses an experimental adjustment secondary air ratio etc. furnace condition's adjustment, improve denitration efficiency, after a series of actions such as adjustment through adding inert combustion, finally realized online NOx's ultralow emission, reach below 30mg/nm year, through increasing inert material and scraper stirring, accomplish partial denitration ammonia nitrogen reaction earlier stage, when the denitration workshop section, through the retest, also reduce to 150 titers by 210 titers in the use of aqueous ammonia, greatly reduced the cost, SO2 has also reduced to ultralow emission standard in the flue gas simultaneously, the cost such as desulfurized calcium oxide has been saved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a can effectively improve furfural sediment boiler deNOx systems of denitration efficiency, includes blanking funnel (1), boiler material loading belt feeder (2), boiler (3), sprays purifying column (5), aqueous ammonia jar (6) and control box (25), its characterized in that: blanking funnel (1) sets up the transmission initial end upper portion at boiler feeding belt conveyor (2), the transmission end and the boiler (3) pan feeding end of boiler feeding belt conveyor (2) are connected, tub (4) of discharging fume is installed to the upper end of boiler (3), the other end and the spray purification tower (5) that set up in boiler (3) one side of discharging fume tub (4) are connected, the opposite side of spray purification tower (5) is provided with ammonia tank (6), install aqueous ammonia pipe (23) between aqueous ammonia tank (6) and spray purification tower (5), install ammonia water pump (24) on aqueous ammonia pipe (23), boiler ash setting gauge (7) and lime stone powder setting gauge (8) have set gradually on the upper portion of boiler feeding belt conveyor (2) along boiler feeding belt conveyor (2) direction of transmission, boiler ash setting gauge (7) and lime stone powder setting gauge (8) all include U type setting bin (16), Landing leg (17), live-rollers (18), center pin (19), dial material motor (20), dial charging tray (21) and discharge gate (22), landing leg (17) have been welded to the bottom of U type group feed bin (16), the internally mounted of U type group feed bin (16) has live-rollers (18), center pin (19) have been pegged graft in the centre of live-rollers (18), the one end of center pin (19) and install the material motor (20) pivot fixed connection of dialling in U type group feed bin (16) outer end, the outer end equipartition of live-rollers (18) is provided with dials charging tray (21), discharge gate (22) have been seted up to the bottom of U type group feed bin (16), primary air fan (9) have been connected to the bottom of boiler (3), one side of boiler (3) is connected with secondary air fan (10), control box (25) set up the bottom at boiler material loading belt feeder (2), control box (25) respectively with boiler ashes dialling ware (7) and lime stone powder dialling ware (8), The primary air fan (9), the secondary air fan (10) and the ammonia pump (24) are electrically connected.
2. The furfural slag boiler denitration system capable of effectively improving denitration efficiency according to claim 1, is characterized in that: the spray purification tower (5) comprises a tower body (14) and a wet dust collector (15) arranged in the tower body (14).
3. The furfural slag boiler denitration system capable of effectively improving denitration efficiency according to claim 1, is characterized in that: the interior of the boiler (3) is respectively provided with a first air cap (12) and a second air cap (13) at the connection part of the primary air fan (9) and the secondary air fan (10).
4. The furfural slag boiler denitration system capable of effectively improving denitration efficiency according to claim 1, is characterized in that: the blanking funnel (1) is internally provided with furfural residues and biomass fuel.
5. The furfural slag boiler denitration system capable of effectively improving denitration efficiency according to claim 1, is characterized in that: the bottom of the boiler (3) is provided with a fluidized bed (11) at the upper part of the first blast cap (12).
6. The furfural slag boiler denitration system capable of effectively improving denitration efficiency according to claim 1, is characterized in that: one end of the ammonia water pipe (23) is inserted into the spraying purification tower (5), and the ammonia water pipe (23) inserted into the spraying purification tower (5) is provided with a spraying hole.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397913A (en) * | 2019-08-06 | 2019-11-01 | 新乡市汇能玉源发电有限公司 | A kind of furfural dregs Denitration in Boiler system effectively improving denitration efficiency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397913A (en) * | 2019-08-06 | 2019-11-01 | 新乡市汇能玉源发电有限公司 | A kind of furfural dregs Denitration in Boiler system effectively improving denitration efficiency |
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