CN103776014A - CO boiler having ash removal function - Google Patents
CO boiler having ash removal function Download PDFInfo
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- CN103776014A CN103776014A CN201210408207.3A CN201210408207A CN103776014A CN 103776014 A CN103776014 A CN 103776014A CN 201210408207 A CN201210408207 A CN 201210408207A CN 103776014 A CN103776014 A CN 103776014A
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Abstract
The invention discloses a CO boiler having the ash removal function. The CO boiler having the ash removal function comprises a first vertical flue, a horizontal flue and a second vertical flue, wherein ash baffles are arranged at the connection position between the first vertical flue and the horizontal flue, an ash storage bin is arranged at the position, flush with the lower edge of the lowest ash baffle, of the inner side of the first vertical flue, the ash baffles are of the structure that multiple layers of baffles are arranged in a staggered mode, each ash baffle is arranged in an inclined mode, and the outer end of each ash baffle is higher than the inner end of the ash baffle. According to the CO boiler having the ash removal function, the ash baffles arranged in the CO boiler can remove most of smoke dust contained in smoke and also play a role in rectifying the smoke, so that the smoke is rectified into the stable horizontal laminar flow state, the smoke evenly passes through steam drums, and the heat exchange efficiency of the boiler is high. The CO boiler having the ash removal function can solve the problem of equipment wear and abrasion caused by the smoke dust to the maximum extent, optimize the smoke processing technology, reduce energy consumption and reduce investment.
Description
Technical field
The present invention relates to the controlling device of oil plant catalytic cracking (FCC) regenerated flue gas, particularly relate to refinery FCC regenerated flue gas SCR SCR denitrating technique device.
Background technology
Nitrogen oxide (NOx) is one of primary pollution source of atmosphere pollution.Nitrogen oxide comprises that multiple compounds is as nitrous oxide (N
2o), nitric oxide (NO), nitrogen dioxide (NO
2), nitrogen trioxide (N
2o
3), dinitrogen tetroxide (N
2o
4) and dinitrogen pentoxide (N
2o
5) etc.Except nitrogen dioxide, other nitrogen oxide are all extremely unstable, meet light, wet or thermal change becomes nitrogen dioxide and nitric oxide, and nitric oxide becomes again nitrogen dioxide.Therefore, what in occupational environment, contact is that several admixture of gas are often called the smoke of gunpowder (gas), is mainly nitric oxide and nitrogen dioxide, and take nitrogen dioxide as main.NOx has toxicity in various degree, is a major reason that forms photochemical fog and acid rain take nitric oxide and nitrogen dioxide as main NOx.NOx in vehicle exhaust and hydrocarbon irradiate the toxic smog that reacts and form through ultraviolet ray, be called photochemical fog.In addition, NOx react with airborne water generate nitric acid and nitrous acid be the composition of acid rain.NOx is mainly manifested in infringement respiratory tract to the harm of human body.
The NOx being discharged in atmosphere mainly contains three sources: power plant's (accounting for 46%), vehicle exhaust (accounting for 49%) and oil-refining chemical factory (accounting for 5%).Oil plant is one of main nitrogen oxide (NOx) emission source.NOx in FCC flue gas measures 50% of the general Zhan Quan NOx of factory discharge capacity, is the NOx emission source of oil plant maximum.FCC gas denitrifying technology mainly comprises at present: selective catalytic reduction (SCR method) and SNCR method (SNCR method), liquid absorption method, solid absorption method and the high energy electron active oxidation method etc. of gas-phase reaction.
Selective catalytic reduction (SCR method) is under catalyst action, utilizes reducing agent selectively to react with the NOx in flue gas, and generates the N of nonhazardous effect
2and H
2the technology of O, its reducing agent can be ammonia, ammoniacal liquor or urea, also can select CO or H
2, also can select little molecule alkane.The advantages such as SCR technology, compared with other technologies, has denitration efficiency high, and thermal discharge is little, technology maturation are in Flue Gas Denitrification Engineering, to apply maximum technology both at home and abroad at present.
SNCR method is under the effect that there is no catalyst, in the burner hearth of 900～1100 ℃, sprays into reducing agent (generally using ammonia, ammoniacal liquor or urea), and the rapid pyrolysis of reducing agent is NH
3, react with the NOx in flue gas and generate nitrogen G&W, in burner hearth, have certain oxygen to exist, the reducing agent spraying into optionally with NOx, substantially not with oxygen reaction.If FCC apparatus has been equipped with CO boiler, SNCR can directly apply.The upstream that ammonia is expelled to CO boiler makes NH
3react in CO boiler with NOx.NOx in this method removes scope and is limited in 40-60%.The SOx content height in FCC tail gas it is worth noting, if can cause ammonium sulfate to be deposited in CO boiler.NSCR refers to that NOx in source of the gas, under uniform temperature and catalyst action, is reduced agent and is reduced to N
2, simultaneously reducing agent also with source of the gas in O
2reaction generates H
2o and CO
2, in this denitrification process, reaction need be by means of the catalytic action of catalyst, and reducing agent and NOx and O
2all react, non-selectivity, therefore be called non-selective catalytic reduction.
1986, the SCR device that first set is applied on FCC flue gas in the world put into operation.By 2005, there are nearly 20 cover SCR devices abroad for the treatment of the NOx in FCC flue gas, domestic also do not have commercial Application at present.In the 20 cover SCR method FCC equipment for denitrifying flue gas of having applied, 1 cover has moved 16 years, and 9 covers have moved 10 years, and catalyst the longest service life is 12 years.Reactor all adopts and falls flow operation, and the height of NOx clearance as requested adopts single or many operations.
CN1895744A discloses a kind of high dirt composite SCR smoke denitrating technique and denitration catalyst reaction unit, and ammonia nitrogen gaseous mixture enters hydrogen-catalyst reactor top air chamber through deflector, then enters downwards and in catalyst layer, be reduced into N
2and H
2o, the flue gas after denitration, by heat exchange, dedusting and desulfurization, is finally discharged from chimney, and the dust that is adsorbed on catalyst surface falls in the ash bucket of hydrogen-catalyst reactor bottom in the effect of dust arrester, the row for the treatment of.The weak point of this structure is, meeting blocking catalyst duct, and employing is oppositely blown ash and the dust in duct can not be blown off completely.Meanwhile, in the time that catalyst strength is not enough, broken catalyst can stop up Benitration reactor, causes flue gas circulation not smooth, and then affects upstream and downstream unit normal run.
CN201454505U discloses a kind of SCR Benitration reactor, and the flue gas after dedusting, desulfurization fully mixes with ammonia at gas approach place, then enters in Benitration reactor shell via reactor inlet, and mist is by beds, NO
xwith NH
3under catalyst action, react, reach the object of denitration.The weak point of this structure is, in the time processing high cloud of dust gas, soot blower can only be cleared up the dust stratification on beds surface, and flue gas just directly enters reactor without buffering, and the dust containing in flue gas can blocking catalyst duct, has a strong impact on denitration efficiency.Meanwhile, in the time that catalyst strength is not enough, broken catalyst can stop up Benitration reactor, causes flue gas circulation not smooth, and then affects upstream and downstream unit normal run.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of CO boiler with dusting function, is intended to solve in prior art smoke content in CO boiler smoke too high and cause the problem of heat-obtaining section Efficiency Decreasing and equipment corrosion.
The invention provides a kind of CO boiler with dusting function, described CO boiler comprises flue, combustion chamber, steam drum, evaporator section, economizer section, described flue comprises the first vertical flue, horizontal flue and the second vertical flue, be provided with combustion chamber in the first vertical flue bottom, in horizontal flue, be provided with steam drum, in the second vertical flue, be provided with evaporator section and economizer section, it is characterized in that, be provided with dust block board in the junction of the first vertical flue and horizontal flue (being CO boiler the first corner), in the first vertical flue outside, the position that is positioned at horizontal flue downside is provided with external hanging type ash-storing bin, on the first vertical flue, having ash discharging hole communicates with ash-storing bin, described dust block board is baffle plate or the corrugated sheet structure of multi-layer intercrossed layout, and dust block board is obliquely installed, and its outer end is higher than the inner.
In the CO boiler with dusting function of the present invention, described dust block board is the sloping baffle of multi-layer intercrossed layout, baffle plate is inner near ash-storing bin one end, one end is outer end relatively, the outer end of baffle plate is higher than the inner, except orlop baffle plate, the inner of all the other baffle plates is sawtooth pattern, and successively reduces to ash-storing bin direction height along the first vertical walling of flue.Lowermost layer baffle plate the inner of described dust block board is connected with edge under ash discharging hole, and the superiors' baffle plate of described dust block board and the first vertical walling of flue are tightly connected.Described dust block board is except the superiors' baffle plate, and all the other baffle plate outer ends can be sawtooth pattern.Every layer of baffle plate of described dust block board formed or is made up of some baffle combination by a baffle plate, between some baffle plates, can have certain interval or gapless.Between adjacent two layers baffle plate, be provided with mixed flue gas passage.
In the CO boiler with dusting function of the present invention, described baffle plate the inner is zigzag, makes the baffle plate entrance area change that relatively circulates, and the gas prompt drop of mixed flue gas is low, and dust cannot carry and be trapped on baffle plate by mixed flue gas; On the other hand, baffle plate is set to zigzag, has pointed structure, and mixed flue gas is had to certain flow-disturbing effect, can further promote that flue dust separates with mixed flue gas.Adjacent two layers baffle plate is staggered, has certain overlapping region, makes mixed flue gas on dust block board, produce baffling, is conducive to remove the flue dust in flue gas, and can prevent that flue dust from, without lower one deck baffle plate first vertical flue that falls back, affecting ash disposal efficiency.Described baffle plate successively reduces to ash-storing bin direction along the first vertical walling of flue, is obliquely installed in the junction of the first vertical flue and horizontal flue (being CO boiler the first corner).Baffle plate outer end is higher than the inner, and angle of inclination arranges according to the angle of repose of flue dust, and inclination angle scope is generally 5 °～45 °, preferably 10 °～25 °.
According to the CO boiler with dusting function of the present invention, in the second vertical flue, ammonia-gas spraying device and Benitration reactor can also be set.Described Benitration reactor is arranged between evaporator section and economizer section, forms vertical linearity integral structure with the second vertical flue.Benitration reactor generally includes some denitrations unit, and each denitration unit generally includes hanging beam, steam sootblower, catalyst module and catalyst brace summer.The principle of CO boiler is first to remove the CO in flue gas by burning, then by each heat-obtaining section Mist heat recovering.SCR reaction needed is carried out 350 ℃ of left and right, neither also not heat release of heat absorption in course of reaction.Therefore between evaporator section and economizer section, Benitration reactor is set, the temperature field that can form by CO boiler combustion and heat-obtaining, carries out SCR reaction at the temperature spot of suitable SCR reaction, removes the NO in flue gas
x, do not affect boiler heat-obtaining, and heat be fully used, thereby reach energy-conservation object.
Described ammonia-gas spraying device can be arranged at the top of evaporator section, also can be arranged between evaporator section and Benitration reactor, preferably ammonia-gas spraying device is arranged on to the top of evaporator section.
Steam drum described in CO boiler of the present invention and evaporator section all adopt structure well known in the art, generally adopt pipe heat exchanger structure.Because described evaporator section is generally the pipe heat exchanger of multiple row tube bank interlaced arrangement, it is highly generally 3～5 meters, in every tubulation bundle, be provided with some parallel heat exchanger tubes, adopt end to end serpentine configuration to arrange between adjacent heat exchange tubes, heat exchanger tube is finned pipe.Evaporator section generally comprises at least two group heat exchangers, and it is along the have an appointment height of 8 meters of left and right of the second flue.Ammonia-gas spraying device is arranged on to porch, evaporator section top, and the finned tube that can make full use of on evaporator section heat exchanger forms turbulent element, utilizes approximately 8 meters of high blending spaces of evaporator section simultaneously, strengthens the mixed effect of ammonia and flue gas.
In the CO boiler with dusting function of the present invention, described ammonia-gas spraying device can adopt structure well known to those skilled in the art, as adopted ammonia-spraying grid, or can adopt disclosed blender in CN201988343U.In CO boiler of the present invention, in order further to increase the mixed effect of flue gas and ammonia, save the extra space that increases mixed ammonia grid, the ammonia-gas spraying device of the following structure of recommend adoption simultaneously.Described ammonia-gas spraying device comprises spray ammonia house steward, spray ammonia arm and spray ammonia element, and spray ammonia arm arranges some, and spray ammonia arm one end is connected with spray ammonia house steward, and the other end is enclosed construction; Described spray ammonia element comprises nozzle, anemostat and spatter plate, and the lower surface of spray ammonia arm is connected with described spray ammonia element by nozzle.Described anemostat comprises contraction section, trunnion and expansion segment, and jet expansion stretches in anemostat contraction section, spatters plate and be arranged at the below of expansion segment.
In CO boiler of the present invention, the outlet of described nozzle lower end preferably adopts undergauge structure.The angle of throat of described anemostat contraction section is generally 10 °～60 °, preferably 15 °～30 °.The length of described trunnion is generally 1～4 times of throat pipe diameter, preferably 1～3 times.The angle of flare of described expansion segment is for being generally 7 °～30 °, preferably 10 °～20 °.
In CO boiler of the present invention, described in spatter plate and be at least two-layerly, plate is provided with sieve aperture, described in to spatter plate percent opening be 10%～60%, preferably 30%～50%.The described plate shape of spattering can be circular, square, rectangle, preferably consistent with outlet, anemostat lower end shape.Described sieve aperture shape can be circle, triangle or square, circular.Describedly spatter the aperture of sieve aperture on plate and be generally 3～8mm, preferably aperture 4～6mm, sieve aperture can adopt equilateral triangle to arrange or square is arranged, and the adjacent sieve aperture that spatters between plate is staggered.Described nozzle, anemostat and the dead in line of spattering plate, the distance of spattering plate and expansion segment outlet horizontal cross-section can be generally 30%～150% of length of throat, preferably 80%～120%.
Compared with prior art, the CO boiler that the present invention has a dusting function has following characteristics:
1, in the CO boiler with dusting function of the present invention, at the first vertical flue and horizontal flue junction, the dust block board with special construction is set, can remove most flue dust contained in flue gas on the one hand, and by ash discharging hole, the flue dust removing be entered to ash-storing bin; On the other hand, set dust block board is high outside and low outside baffle arrangement, it has the effect of the flue gas of the dust block board of flowing through being carried out to rectification simultaneously, thereby be more stable horizontal laminar flow fluidised form by flue gas rectification, after making ash disposal rectification, flue gas, evenly by steam drum, obtains higher boiler heat exchange efficiency.Before steam drum, dust block board is set simultaneously, can also stop flue dust to enter evaporator section, economizer section and the Benitration reactor in downstream as far as possible, blow grey frequency thereby can reduce, improve the thermal efficiency of boiler, solve the equipment abrasion problem causing because of flue dust, optimize flue gas treating process, reduce energy consumption, save investment.
2, the present invention has the CO boiler of dusting function, CO boiler of the prior art and FCC flue gas denitration reactor are integrated into a combined unit and realize the function of the two, but the two is not adding and relation in simple meaning, but there is to each other certain facilitation.In the present invention, Benitration reactor and CO boiler are arranged to combined unit, the temperature field forming by CO boiler combustion and heat-obtaining, at the temperature spot of suitable SCR reaction, Benitration reactor is set and carries out SCR reaction, due to neither also not heat release of heat absorption of SCR reaction, can, in the situation that not affecting recycling CO residual heat from boiler fume, better utilize fume afterheat, improve heating efficiency, reduced investment.
3, the CO boiler that the present invention has a dusting function can also comprise ammonia-gas spraying device and Benitration reactor simultaneously, thereby becomes the CO boiler with ash disposal and denitration function.Before ammonia-gas spraying device is arranged on to evaporator section, utilize on the one hand the finned tube on evaporator section heat exchanger to form turbulent element; Can make full use of on the other hand the space of about approximately 8 meters height of evaporator section, for flue gas and ammonia provide longer mixing distance and larger blending space, do not need additionally to arrange mixed ammonia grid, strengthen ammonia and flue gas mixture homogeneity, solved mixing and caused ammonia and the poor problem of flue gas mixed effect apart from short-range missile; Improve the mixed effect of ammonia and flue gas, contributed to equally to improve denitration efficiency and prevent the escaping of ammonia.
4, the CO boiler with dusting function of the present invention, Benitration reactor and CO boiler form integral structure, do not need additionally to arrange flow straightening grid, can make the inner smoke distribution of Benitration reactor even, fluid stable, and guarantee that flue gas vertical current crosses catalyst duct, and prevent catalyst to cause damage, reduce system pressure drop; Can also, for economizer section provides stable laminar flow state, guarantee the thermal efficiency of evaporator section and economizer section simultaneously.
5, the described CO boiler with dusting function, preferably adopt efficient ammonia-gas spraying device, the wherein said plate that spatters is three layers, ground floor spatters plate sectional area and is greater than expansion segment lower end discharge area, make mist after spattering plate, form solid-cone range of distribution, and the larger dispersion territory of generation, increase mist be not inhaled into anemostat flue gas mix again probability, flue gas is mixed more abundant with ammonia, guarantee that within the scope of whole reactor cross section, ammonia is uniformly distributed, give full play to catalyst performance, improve denitration efficiency and prevent the escaping of ammonia, reduce and mix needed space, reduce investment outlay.Described gas jet arm is parallel in flue, and nozzle, along the intensive layout in flue cross section, overlaps each anemostat suction areas, guarantees being uniformly distributed of gas.By being arranged on the efficient spray ammonia element before Benitration reactor, guarantee being uniformly distributed of ammonia within the scope of whole reactor cross section, give full play to catalyst performance, guarantee denitration efficiency and prevent the escaping of ammonia.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention has the CO boiler of dusting function.
Fig. 2 is structure and the work schematic diagram of dust block board.
Fig. 3 is ammonia-gas spraying device front view of the present invention.
Fig. 4 is spray ammonia element front view of the present invention.
The specific embodiment
Further illustrate concrete scheme and the occupation mode of Benitration reactor of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, the CO boiler that the present invention has dusting function comprises flue 1, combustion chamber 2, steam drum 3, evaporator section 5, economizer section 7 and dust block board 24, described flue comprises the first vertical flue 8, horizontal flue 9 and the second vertical flue 10, described horizontal flue 9 two ends are communicated with the top of the first vertical flue 8 and the second vertical flue 10 respectively, combustion chamber 2 is arranged in the first vertical flue 8, steam drum 3 is arranged in horizontal flue 9, and evaporator section 5 and economizer section 7 are arranged in the second vertical flue 10.Be provided with dust block board 24 at the first vertical flue 8 with the junction (being CO boiler the first corner) of horizontal flue 9, in the first vertical flue 8 outsides, the position that is positioned at horizontal flue 9 downsides is provided with and on the vertical flue 8 of external hanging type ash-storing bin 25, the first, has ash discharging hole and communicate with ash-storing bin 25.The sloping baffle that described dust block board 24 is multi-layer intercrossed layout, baffle plate is inner near ash-storing bin 25 one end, and one end is outer end relatively, and the outer end of baffle plate is higher than the inner, and inclination angle scope arranges according to the angle of repose of flue dust, and inclination angle scope is preferably 10 °～25 °.Described dust block board 24 is except orlop baffle plate, and the inner of all the other baffle plates is sawtooth pattern, successively reduces to ash-storing bin direction height along the first vertical walling of flue.Lowermost layer baffle plate the inner of described dust block board 24 is connected with edge under ash discharging hole, and the superiors' baffle plate of described dust block board 24 is connected with the first vertical flue 8 inner wall sealings.Described dust block board 24 is except the superiors' baffle plate, and the outer end of all the other baffle plates is preferably sawtooth pattern.Described dust block board 24 is multi-layer intercrossed arranges, and leaves mixed flue gas passage between adjacent two layers baffle plate.
The present invention has in the CO boiler of dusting function, can also comprise ammonia-gas spraying device 4 and Benitration reactor 6 simultaneously, and described ammonia-gas spraying device 4 is arranged in the second vertical flue 10, is positioned at evaporator section 5 tops, and Benitration reactor 6 is between evaporator section 5 and economizer section 7.Benitration reactor 6 comprises hanging beam 11, steam sootblower 12, catalyst module 13 and catalyst brace summer 14.
The CO boiler with dusting function provided by the invention in use, first, by the hanging beam 11 of Benitration reactor 6 interior settings, hangs in catalyst module 13 in Benitration reactor 6, is placed on catalyst brace summer 14, completes the installation of catalyst module 13.First fully burning in combustion chamber 2 of flue gas, remove the CO in flue gas, mixed flue gas is through being inclined at the dust block board 24 of the first vertical flue 8 with the junction setting of horizontal flue 9, adjacent two layers baffle plate is staggered, there is certain overlapping region, because baffle plate is zigzag, make the long-pending increase of dust block board entrance section, circulation area change relatively, mixed flue gas gas prompt drop is low, dust cannot carry and be trapped on baffle plate by mixed flue gas, and zigzag baffle plate has certain flow-disturbing effect to mixed flue gas, further promote that flue dust separates with mixed flue gas, flue dust impinges upon on baffle plate, and successively fall into ash-storing bin 25 by ash discharging hole along baffle plate under Action of Gravity Field, reach the object of dedusting, mixed flue gas produces baffling on dust block board 24, flue gas flow direction occurs to pass through after the mixed flue gas passage between adjacent two layers baffle plate after continuous reverse deviation, carry out heat-obtaining by the steam drum 3 of CO boiler 1 again, flue gas after steam drum heat-obtaining mixes with the ammonia that ammonia-gas spraying device 4 sprays into, form turbulent element through the finned tube on heat exchanger in evaporator section, strengthen ammonia and flue gas mixed effect, described evaporator section has the height of 8 meters of left and right along the second flue on the other hand, for flue gas and ammonia provide larger blending space, mixed flue-gas temperature is 350 ℃ of left and right, enters Benitration reactor 6 and carries out reduction reaction and remove NO
x, enter economizer section 7 through denitration flue gas after treatment and continue heat-obtaining, complete after net quantity of heat removal process, can discharging directly into atmosphere or enter desulfurizer.When dust content in flue gas increases,, start steam sootblower 12 and blow ash when in blocking catalyst the duct.
In the CO boiler with dusting function of the present invention, described ammonia-gas spraying device can adopt the conventional ammonia-spraying grid structure in this area.The ammonia-gas spraying device of the following structure of recommend adoption of the present invention.Described ammonia-gas spraying device 4 comprises spray ammonia house steward 15, spray ammonia arm 16 and spray ammonia element 17, and described spray ammonia arm 16 arranges some, and one end of spray ammonia arm 16 is connected with spray ammonia house steward 15, and the other end is enclosed construction; Described spray ammonia element 17 comprises nozzle 18, anemostat 19 and spatter plate 20, and the lower surface of spray ammonia arm 16 is connected with described spray ammonia element 17 by nozzle 18.Described anemostat 19 comprises contraction section 21, trunnion 22 and expansion segment 23 from top to bottom successively, and nozzle 18 lower ends outlets are stretched in anemostat contraction section 21, described in spatter plate 20 and be arranged at the below of expansion segment 23.Wherein, contraction section angle of throat is 15 °～30 °, 10 °～20 ° of the expansion segment angles of flare, length of throat is throat pipe diameter 1～3 times; The described plate 4 that spatters can be three layers, and plate is provided with sieve aperture, ground floor spatters the lower end discharge area that plate sectional area is greater than expansion segment 7, all the other two-layer plate sectional areas that spatter dwindle gradually, the described plate percent opening that spatters is 30%～50%, the aperture of spattering sieve aperture on plate is 4～6mm, adopts equilateral triangle to arrange or square is arranged, and the adjacent sieve aperture that spatters between plate is staggered.
Ammonia-gas spraying device 4 of the present invention in use, ammonia enters spray ammonia arm 16 through spray ammonia house steward 15, spray into anemostat contraction section 21 by the nozzle 18 on spray ammonia arm 10, and in the interior acceleration of contraction section 21, form negative pressuren zone, produce swabbing action and suck near the most of flue gas of contraction section 21 entrances, mist enters anemostat expansion segment 23 through trunnion 22, and slow down in expansion segment 23, realize the first stage of two kinds of gases and mix; Mist is spattering plate 20 places generation splash, utilization is spattered plate 20 simulation model for mixing gases flows is formed and hindered, make mist after spattering plate 20, form solid-cone range of distribution, increase mist be not inhaled into anemostat 19 flue gas mix again probability, and the larger dispersion territory of generation, realize mist and mix with the second stage that is not inhaled into anemostat 19 flue gases, reach good mixed effect.
Claims (12)
1. one kind has the CO boiler of dusting function, described CO boiler comprises flue, combustion chamber, steam drum, evaporator section, economizer section, described flue comprises the first vertical flue, horizontal flue and the second vertical flue, be provided with combustion chamber in the first vertical flue bottom, in horizontal flue, be provided with steam drum, in the second vertical flue, be provided with evaporator section and economizer section, it is characterized in that, junction at the first vertical flue and horizontal flue is provided with dust block board, in the first vertical flue outside, the position that is positioned at horizontal flue downside is provided with external hanging type ash-storing bin, described dust block board is the baffle arrangement of multi-layer intercrossed layout, and dust block board is obliquely installed, and its outer end is higher than the inner.
2. according to CO boiler claimed in claim 1, it is characterized in that, the inner of described baffle plate is sawtooth pattern, and baffle plate successively reduces to ash-storing bin direction height along the first vertical walling of flue.
3. according to CO boiler claimed in claim 1, it is characterized in that, the lowermost layer baffle plate of described dust block board is connected with the upper end of ash-storing bin, and the superiors' baffle plate of described dust block board and the first vertical walling of flue are tightly connected.
4. according to CO boiler claimed in claim 1, it is characterized in that, every layer of baffle plate of described dust block board formed or is made up of some baffle combination by a baffle plate, has certain interval or gapless between some baffle plates.
5. according to CO boiler claimed in claim 1, it is characterized in that, the angle of inclination of described baffle plate is 5 °～45 °.
6. according to CO boiler claimed in claim 1, it is characterized in that, described dust block board is except the superiors' baffle plate, and all the other baffle plate outer ends are sawtooth pattern.
7. according to CO boiler claimed in claim 1, it is characterized in that, in the second vertical flue, be also provided with ammonia-gas spraying device and Benitration reactor, described ammonia-gas spraying device is arranged at the top of evaporator section, or is arranged between evaporator section and Benitration reactor; Described Benitration reactor is arranged between evaporator section and economizer section, forms vertical linearity integral structure with the second vertical flue.
8. according to CO boiler claimed in claim 7, it is characterized in that, described Benitration reactor comprises some denitrations unit, and each denitration unit includes hanging beam, steam sootblower, catalyst module and catalyst brace summer.
9. according to CO boiler claimed in claim 7, it is characterized in that, described ammonia-gas spraying device is arranged on the top of evaporator section.
10. according to CO boiler claimed in claim 7, it is characterized in that, described ammonia-gas spraying device comprises spray ammonia house steward, spray ammonia arm and spray ammonia element, and spray ammonia arm arranges some, and spray ammonia arm one end is connected with spray ammonia house steward, and the other end is enclosed construction; Described spray ammonia element comprises nozzle, anemostat and spatter plate, and the lower surface of spray ammonia arm is connected with described spray ammonia element by nozzle; Described anemostat comprises contraction section, trunnion and expansion segment, and jet expansion stretches in anemostat contraction section, spatters plate and be arranged at the below of expansion segment.
11. according to CO boiler claimed in claim 10, it is characterized in that, the angle of throat of described anemostat contraction section is 10 °～60 °, the length of described trunnion is throat pipe diameter 1～4 times, the angle of flare of expansion segment is 7 °～30 °.
12. according to CO boiler claimed in claim 10, it is characterized in that, described in spatter plate and be at least two-layerly, plate is provided with sieve aperture, described in to spatter plate percent opening be 10%～60%, the adjacent sieve aperture that spatters between plate is staggered, described nozzle, anemostat and the dead in line of spattering plate.
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| CN107008144A (en) * | 2017-05-23 | 2017-08-04 | 国电科学技术研究院 | A kind of device and denitration method for flue gas for realizing SCR denitrating flue gas multistage spray ammonia |
| CN107780696A (en) * | 2016-08-30 | 2018-03-09 | 辽宁埃勒蒙新能源技术有限公司 | Spliced wind-force Full-automatic dust removal chimney |
| CN107894003A (en) * | 2017-09-30 | 2018-04-10 | 北京中电联环保股份有限公司 | Application of the gas-gas heat exchanger in SCR denitration mixed flow system |
| CN109464682A (en) * | 2018-09-29 | 2019-03-15 | 安溪县斯马拓科技发展有限公司 | A kind of steam-sprayed fermentation medium heat sterilization device |
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| CN114082223A (en) * | 2021-11-28 | 2022-02-25 | 宁波利万新材料有限公司 | Regeneration method of styrene polymerization inhibitor (TBC) removing tower filler |
| CN114288847A (en) * | 2021-12-24 | 2022-04-08 | 杭州新世纪能源环保工程股份有限公司 | SCR denitration device with uniform flue gas flow field flow velocity and ammonia concentration distribution |
| CN114288847B (en) * | 2021-12-24 | 2022-09-02 | 杭州新世纪能源环保工程股份有限公司 | SCR denitration device with uniform flue gas flow field flow velocity and ammonia concentration distribution |
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