CN105597530A - Denitration system applied to coal dust boiler - Google Patents
Denitration system applied to coal dust boiler Download PDFInfo
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- CN105597530A CN105597530A CN201511010060.2A CN201511010060A CN105597530A CN 105597530 A CN105597530 A CN 105597530A CN 201511010060 A CN201511010060 A CN 201511010060A CN 105597530 A CN105597530 A CN 105597530A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a denitration system applied to a coal dust boiler and aims to provide a denitration system capable of finishing denitration transformation without changing a coal economizer and an air preheater of the boiler. The denitration system comprises a high temperature flue, the coal economizer, the air preheater, an intensive flue conversion structure and an SCR reactor positioned outside the high temperature flue. The intensive flue conversion structure comprises a conversion flue and an inclined partition plate arranged in the conversion flue, the upper end of the conversion flue is provided with a first conversion flue inlet, the side surface of the conversion flue is provided with a first conversion flue outlet, the side surface of the conversion flue is provided with a second conversion flue inlet, and the lower end of the conversion flue is provided with a second conversion flue outlet; the first conversion flue inlet is connected with the outlet of the coal economizer; the first conversion flue outlet is connected with a smoke inlet of the SCR reactor of which a smoke exhausting port is connected with the second conversion flue inlet; the second conversion flue outlet is connected with the inlet of the air preheater.
Description
Technical field
The present invention relates to pulverized-coal fired boiler exhaust system, be specifically related to the denitrating system of applying in a kind of pulverized-coal fired boiler.
Background technology
Along with the raising day by day of environmental requirement, in existing thermal power plant, to N0x, the discharge index of S02 and flue dust requires more and more stricter. The GB of now carrying out requires high to the emission limit of N0x, the requirement of minimum discharge is even less than 50mg/m3. At present built large quantities of power plant are not up to standard because of discharge, need carry out denitration transformation, will reach emission request. At present, the method for main flow is to adopt SCR reactor (SelectiveCatalyticReduction) to be SCR technology.
SCR reactor is mainly made up of the deposit of SCR catalytic reactor, ammonia spraying system, ammonia and supply system, soot blower system etc. The arrangement of SCR catalytic reactor, generally adopts high dirt arrangement at present both at home and abroad, is arranged in the high-temperature flue between economizer and air preheater; In this position, flue-gas temperature can reach the optimum temperature of reaction. Flue gas is entered in a vertically arranged SCR reactor by the outlet of the economizer of high-temperature flue, is provided with ammonia spraying system before flue gas enters catalyst layer, and flue gas enters catalyst layer after fully mixing with ammonia, carries out catalyst reaction, sloughs NOX. Reacted flue gas enters after air preheater, electric cleaner, air-introduced machine and desulfurizer, enters chimney.
Need at present the pulverized-coal fired boiler of denitration transformation, the overwhelming majority is the arrangement space of reserved SCR reactor not, thereby need to, by flue gas after first drawing between economizer and air preheater, after SCR reactor, draw back again; But not having enough spaces that flue gas is drawn and introduced between the economizer of coal-burning boiler of the overwhelming majority and air preheater, it need to be transformed and strengthen the space between economizer and air preheater the air preheater of the economizer on top or bottom; And no matter be the transformation to economizer or air preheater, bring impact not only to the original performance of boiler, and increased greatly cost and construction period.
Summary of the invention
The object of the invention is in order to overcome the deficiencies in the prior art, the denitrating system of applying in a kind of pulverized-coal fired boiler is provided, its can in the case of keep the economizer of boiler and air preheater position motionless, complete denitration transformation, SCR reactor is normally worked, will reach fume emission requirement.
Technical scheme of the present invention is:
The denitrating system of applying in a kind of pulverized-coal fired boiler, comprise high-temperature flue, be arranged on economizer and air preheater in high-temperature flue, also comprise and be arranged on the intensive flue transformational structure in high-temperature flue and between economizer and air preheater and be positioned at the SCR reactor outside high-temperature flue, described intensive flue transformational structure comprises flue changeable and is arranged in flue changeable and flue changeable is separated into upper and lower two-part tilt clapboard, the upper end of described flue changeable is provided with the first flue changeable entrance, on flue changeable side and above being positioned at tilt clapboard, be provided with the first flue changeable outlet, on flue changeable side and below being positioned at tilt clapboard, be provided with the second flue changeable entrance, the lower end of described flue changeable is provided with the second flue changeable outlet, described the first flue changeable entrance is connected with the outlet of economizer, described the first flue changeable outlet is connected with the mouth that enters of SCR reactor, the exhaust opening of SCR reactor is connected with the second flue changeable entrance, and the second flue changeable outlet is connected with the entrance of air preheater.
The size (be spacing flue changeable upper and lower two ends between) of the flue changeable of the intensive flue transformational structure of this programme in short transverse can be compressed greatly, its can smoothly by flue gas after first drawing between economizer and air preheater, in the situation of drawing back again after SCR reactor, reduce greatly the size of flue changeable in short transverse, make between its economizer and air preheater that can be arranged on current existing coal-burning boiler; Thereby the denitrating system of applying in the pulverized-coal fired boiler of this programme can in the case of keep the economizer of boiler and air preheater position motionless, complete denitration transformation, SCR reactor is normally worked, will reach fume emission requirement.
As preferably, SCR reactor comprises SCR flue and is arranged on the ammonia-gas spraying device on SCR flue, described SCR flue comprises vertical smoke-intake pipe road, and described ammonia-gas spraying device comprises ammonia admission line and some ammonia shower nozzles being circumferentially distributed on vertical smoke-intake pipe road
On described vertical smoke-intake pipe road, be also provided with spray ammonia self-adaption regulation system, this spray ammonia self-adaption regulation system comprises that some and ammonia shower nozzle sprays ammonia adaptive regulating mechanism one to one, described spray ammonia adaptive regulating mechanism comprises that the self adaptation being arranged in vertical smoke-intake pipe road regulates aerofoil, be arranged on the horizontal cylinder body on vertical smoke-intake pipe road, be arranged on first piston body and the second piston body in horizontal cylinder body, connect the first connecting rod of first piston body and the second piston body, be arranged on air inlet and exhaust outlet on horizontal cylinder body, described air inlet is connected with ammonia admission line, described exhaust outlet is connected with the import of corresponding ammonia shower nozzle,
Described self adaptation regulates the lower end of aerofoil to be hinged on the medial surface in vertical smoke-intake pipe road, extend obliquely toward the center position in vertical smoke-intake pipe road upper end, one end of described horizontal cylinder body is positioned at vertical smoke-intake pipe road, the other end is positioned at outside, vertical smoke-intake pipe road, and be positioned at an end opening of the horizontal cylinder body in vertical smoke-intake pipe road, the one end that is positioned at the horizontal cylinder body outside vertical smoke-intake pipe road is provided with ventilative through hole, described horizontal cylinder body medial surface is provided with the first limited block and the second limited block, and the end of the close horizontal cylinder body that is positioned at vertical smoke-intake pipe road of the first limited block,
Described first piston body, the second piston body, air inlet and exhaust outlet are between the first limited block and the second limited block, and first piston body leans near the first limited block, the end that is positioned at the second piston body and horizontal cylinder body in described horizontal cylinder body is provided with Compress Spring, and Compress Spring and the second limited block are positioned at the same side of the second piston body, described self adaptation regulates between aerofoil and first piston body and is connected by second connecting rod, the hinged first piston end of body in one end of second connecting rod, the hinged self adaptation of the other end regulates the top of aerofoil;
In the time that first piston body is resisted against on the first limited block: described air inlet is between first piston body and the second piston body, and the part in described exhaust outlet is hidden by the second piston body envelope;
In the time that the second piston body is resisted against on the second limited block: described air inlet and exhaust outlet are between first piston body and the second piston body.
Due to flue gas enters in the vertical smoke-intake pipe road of vertically arranged SCR reactor by the outlet of economizer after, have the inhomogeneous problem of air-flow velocity in vertical smoke-intake pipe road, and the ammonia emitted dose of each ammonia shower nozzle of ammonia-gas spraying device is identical; This just makes the flue gas of each several part and the mixed proportion of ammonia in vertical smoke-intake pipe road there are differences, and the part ammonia ratio that air-flow velocity is larger is lower, flue gas is mixed inhomogeneous with ammonia, and then affects the catalytic effect of flue gas in catalyst layer. This improves this programme this problem, spray ammonia self-adaption regulation system can carry out adaptive adjusting ammonia emitted dose by the air-flow velocity in vertical smoke-intake pipe road, the larger ammonia emitted dose of air-flow velocity also increases accordingly, thereby effectively improve the problem that in vertical smoke-intake pipe road, the flue gas of each several part and the mixed proportion of ammonia there are differences, make flue gas and ammonia mixing homogeneous, ensure the catalytic effect of flue gas in catalyst layer.
As preferably, self adaptation regulate aerofoil be positioned at corresponding ammonia shower nozzle under.
As preferably, ammonia shower nozzle is positioned at sustained height, and the puff prot of ammonia shower nozzle is communicated with the vertical inner chamber in smoke-intake pipe road, and the import of ammonia shower nozzle is positioned at the outside in vertical smoke-intake pipe road.
As preferably, horizontal cylinder body is along the vertically radially extension in smoke-intake pipe road.
As preferably, ammonia admission line comprises the annular mozzle being set on vertical smoke-intake pipe road and the ammonia-feeding pipe road being connected with annular mozzle, and described air inlet is connected with annular mozzle by the first tube connector.
As preferably, the top edge of tilt clapboard is near the upper end of flue changeable, and the lower limb of tilt clapboard is near the lower end of flue changeable.
As preferably, economizer is positioned at the top of air preheater.
As preferably, the first flue changeable outlet and the second flue changeable entrance are positioned at the relative both sides of flue changeable.
The invention has the beneficial effects as follows: can in the case of keep the economizer of boiler and air preheater position motionless, complete denitration transformation, SCR reactor is normally worked, will reach fume emission requirement.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the denitrating system applied in pulverized-coal fired boiler of the present invention.
Fig. 2 is a kind of structural representation of intensive flue transformational structure of the present invention.
Fig. 3 is a kind of structural representation of SCR reactor of the present invention.
Fig. 4 is the partial enlarged drawing at A place in Fig. 3.
Fig. 5 is the partial enlarged drawing at A place in Fig. 4.
In figure: economizer 1, intensive flue transformational structure 2, the first flue changeable outlet 21, the second flue changeable entrance 22, flue changeable 23, tilt clapboard 24, the first flue changeable entrance 25, the second flue changeable outlet 26, smoke discharge tube road 3, air preheater 4, flue gas enters pipeline 5, vertically smoke-intake pipe road 6, spray ammonia adaptive regulating mechanism 7, self adaptation regulates aerofoil 71, second connecting rod 72, horizontal cylinder body 73, the second piston body 74, air inlet 75, the first limited block 76, first piston body 77, first connecting rod 78, and exhaust outlet 79, the second limited block 710, Compress Spring 711, ventilative through hole 712, ammonia-gas spraying device 8, ammonia shower nozzle 81, the second tube connector 82, the first tube connector 83, ammonia-feeding pipe road 84, annular mozzle 85, SCR catalytic unit 9.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
As shown in Figure 1, Figure 2, Figure 3 shows, the denitrating system of applying in a kind of pulverized-coal fired boiler comprises high-temperature flue, be arranged on economizer 1 and air preheater 4 in high-temperature flue, be arranged on the intensive flue transformational structure 2 in high-temperature flue and between economizer and air preheater and be positioned at the SCR reactor outside high-temperature flue. Economizer is positioned at the top of air preheater. SCR reactor comprises SCR flue, is arranged on ammonia-gas spraying device 8 and SCR catalytic unit 9 on SCR flue, and ammonia-gas spraying device and SCR catalytic unit are successively arranged along the air current flow direction of SCR flue. SCR flue comprises vertical smoke-intake pipe road 6.
Intensive flue transformational structure comprises flue changeable 23 and is arranged in flue changeable and flue changeable is separated into upper and lower two-part tilt clapboard 24. The top edge of tilt clapboard is near the upper end of flue changeable, and the lower limb of tilt clapboard is near the lower end of flue changeable. The upper end of flue changeable is provided with the first flue changeable entrance 25. On flue changeable side and above being positioned at tilt clapboard, be provided with the first flue changeable outlet 21. On flue changeable side and below being positioned at tilt clapboard, be provided with the second flue changeable entrance 22. The lower end of flue changeable is provided with the second flue changeable outlet 26. The first flue changeable exports the relative both sides that are positioned at flue changeable with the second flue changeable entrance.
The first flue changeable entrance is connected with the outlet of economizer. The first flue changeable outlet is connected with the mouth that enters of SCR reactor, and specifically, the first flue changeable outlet is connected with the lower port in vertical smoke-intake pipe road by smoke discharge tube road 3. Vertically smoke-intake pipe road lower port be positioned at the mouth that enters of SCR reactor. The exhaust opening of SCR reactor is connected with the second flue changeable entrance, specifically, enters pipeline 5 be connected between the exhaust opening of SCR reactor and the second flue changeable entrance by flue gas. The second flue changeable outlet is connected with the entrance of air preheater.
As shown in Figure 1 and Figure 2, the size (be spacing flue changeable upper and lower two ends between) of the flue changeable of the intensive flue transformational structure of this programme in short transverse can be compressed greatly, its can smoothly by flue gas after first drawing between economizer and air preheater, in the situation of drawing back again after SCR reactor, reduce greatly the size of flue changeable in short transverse, make between its economizer and air preheater that can be arranged on current existing coal-burning boiler; Thereby the denitrating system of applying in the pulverized-coal fired boiler of this programme can in the case of keep the economizer of boiler and air preheater position motionless, complete denitration transformation.
As shown in Figure 3, Figure 4, ammonia-gas spraying device 8 comprises ammonia admission line and some ammonia shower nozzles 81 being circumferentially distributed on vertical smoke-intake pipe road. Ammonia admission line comprises the annular mozzle 85 being set on vertical smoke-intake pipe road and the ammonia-feeding pipe road 84 being connected with annular mozzle. Each ammonia shower nozzle is positioned at sustained height. The puff prot of ammonia shower nozzle is communicated with the inner chamber in vertical smoke-intake pipe road, and the import of ammonia shower nozzle is positioned at the outside in vertical smoke-intake pipe road.
As shown in Fig. 3, Fig. 4, Fig. 5, vertically on smoke-intake pipe road, be also provided with spray ammonia self-adaption regulation system. This spray ammonia self-adaption regulation system comprises that some and ammonia shower nozzle sprays ammonia adaptive regulating mechanism 7 one to one. Spray ammonia adaptive regulating mechanism comprises that the self adaptation being arranged in vertical smoke-intake pipe road regulates aerofoil 71, be arranged on the horizontal cylinder body 73 on vertical smoke-intake pipe road, be arranged on first piston body 77 and the second piston body 74 in horizontal cylinder body, the first connecting rod 78 that connects first piston body and the second piston body, is arranged on air inlet 75 and exhaust outlet 79 on horizontal cylinder body. Air inlet is connected with ammonia admission line, and specifically, air inlet is connected with annular mozzle by the first tube connector 83. Exhaust outlet is connected with the import of corresponding ammonia shower nozzle, specifically, between exhaust outlet and the import of corresponding ammonia shower nozzle, is connected by the second tube connector 82.
Horizontal cylinder body is along the vertically radially extension in smoke-intake pipe road. One end of horizontal cylinder body is positioned at vertical smoke-intake pipe road, and the other end is positioned at outside, vertical smoke-intake pipe road, and is positioned at an end opening of the horizontal cylinder body in vertical smoke-intake pipe road, and the one end that is positioned at the horizontal cylinder body outside vertical smoke-intake pipe road is provided with ventilative through hole 712. Horizontal cylinder body medial surface is provided with the first limited block 76 and the second limited block 710, and the end of the close horizontal cylinder body that is positioned at vertical smoke-intake pipe road of the first limited block. First piston body, the second piston body, air inlet and exhaust outlet are between the first limited block and the second limited block, and first piston body leans near the first limited block. The end that is positioned at the second piston body and horizontal cylinder body in horizontal cylinder body is provided with Compress Spring 711, and Compress Spring and the second limited block are positioned at the same side of the second piston body.
Self adaptation regulate aerofoil be positioned at corresponding ammonia shower nozzle under. Self adaptation regulates the lower end of aerofoil to be hinged on the medial surface in vertical smoke-intake pipe road, and self adaptation regulates the upper end of aerofoil to extend obliquely toward the center position in vertical smoke-intake pipe road. Self adaptation regulates between aerofoil and first piston body and is connected by second connecting rod 72. The hinged first piston end of body in one end of second connecting rod, the hinged self adaptation of the other end regulates the top of aerofoil.
As shown in Figure 5, in the time that first piston body is resisted against on the first limited block: air inlet is between first piston body and the second piston body, and the part in exhaust outlet is hidden by the second piston body envelope.
In the time that the second piston body is resisted against on the second limited block: air inlet and exhaust outlet are between first piston body and the second piston body.
The specific works process of the denitrating system of applying in the pulverized-coal fired boiler of the present embodiment is as follows:
The first, flue gas is entered in SCR reactor through the first flue changeable entrance, the first flue changeable outlet and smoke discharge tube road successively by the outlet of economizer.
The second, when flue gas enters after SCR reactor:
First, flue gas process vertical smoke-intake pipe road, and in the flue gas process process in vertical smoke-intake pipe road, the lasting injection ammonia of ammonia shower nozzle of ammonia-gas spraying device.
On the other hand, as shown in Figure 4, in the flue gas process process in vertical smoke-intake pipe road: the air-flow self adaptation of flowing through from bottom to top regulates in the process of aerofoil, due to the effect of wind-force, the upper end of self adaptation adjusting aerofoil will be toward the vertically medial surface direction rotation in smoke-intake pipe road; And the air-flow velocity at the position in the vertical smoke-intake pipe road at self adaptation adjusting aerofoil place is larger, it is also larger toward the distance that vertically the medial surface direction in smoke-intake pipe road is rotated that self adaptation regulates the upper end of aerofoil;
As shown in Figure 5, in the time that self adaptation regulates the upper end of aerofoil to rotate toward the medial surface direction in vertical smoke-intake pipe road, second connecting rod will drive first piston body, the second piston body to move toward the second limited block direction, thereby increase the aperture of exhaust outlet; And self adaptation regulates the upper end of aerofoil larger toward the distance that vertically the medial surface direction in smoke-intake pipe road is rotated, and the distance that first piston body, the second piston body move toward the second limited block direction is also larger, and the aperture of corresponding exhaust outlet is also larger; The ammonia emitted dose of the larger ammonia of the aperture shower nozzle of exhaust outlet is also larger.
Thereby the spray ammonia self-adaption regulation system of the present embodiment can carry out adaptive adjusting ammonia emitted dose by the air-flow velocity in vertical smoke-intake pipe road, the larger ammonia emitted dose of air-flow velocity also increases accordingly, thereby effectively improve the problem that in vertical smoke-intake pipe road, the flue gas of each several part and the mixed proportion of ammonia there are differences, make flue gas and ammonia mixing homogeneous, ensure the catalytic effect of flue gas in catalyst layer.
Then, flue gas enters in SCR catalytic unit after fully mixing with ammonia, carries out catalyst reaction, sloughs NOX。
Follow, reacted flue gas enters pipeline, the second flue changeable entrance and the outlet of the second flue changeable through flue gas successively and enters air preheater, and is discharged by air preheater again.
Claims (9)
1. the denitrating system of applying in a pulverized-coal fired boiler, comprise high-temperature flue, be arranged on economizer and air preheater in high-temperature flue, it is characterized in that, also comprise and be arranged on the intensive flue transformational structure in high-temperature flue and between economizer and air preheater and be positioned at the SCR reactor outside high-temperature flue
Described intensive flue transformational structure comprises flue changeable and is arranged in flue changeable and flue changeable is separated into upper and lower two-part tilt clapboard, the upper end of described flue changeable is provided with the first flue changeable entrance, on flue changeable side and above being positioned at tilt clapboard, be provided with the first flue changeable outlet, on flue changeable side and below being positioned at tilt clapboard, be provided with the second flue changeable entrance, the lower end of described flue changeable is provided with the second flue changeable outlet; Described the first flue changeable entrance is connected with the outlet of economizer, described the first flue changeable outlet is connected with the mouth that enters of SCR reactor, the exhaust opening of SCR reactor is connected with the second flue changeable entrance, and the second flue changeable outlet is connected with the entrance of air preheater.
2. the denitrating system of applying in a kind of pulverized-coal fired boiler according to claim 1, it is characterized in that, described SCR reactor comprises SCR flue and is arranged on the ammonia-gas spraying device on SCR flue, described SCR flue comprises vertical smoke-intake pipe road, described ammonia-gas spraying device comprises ammonia admission line and some ammonia shower nozzles being circumferentially distributed on vertical smoke-intake pipe road
On described vertical smoke-intake pipe road, be also provided with spray ammonia self-adaption regulation system, this spray ammonia self-adaption regulation system comprises that some and ammonia shower nozzle sprays ammonia adaptive regulating mechanism one to one, described spray ammonia adaptive regulating mechanism comprises that the self adaptation being arranged in vertical smoke-intake pipe road regulates aerofoil, be arranged on the horizontal cylinder body on vertical smoke-intake pipe road, be arranged on first piston body and the second piston body in horizontal cylinder body, connect the first connecting rod of first piston body and the second piston body, be arranged on air inlet and exhaust outlet on horizontal cylinder body, described air inlet is connected with ammonia admission line, described exhaust outlet is connected with the import of corresponding ammonia shower nozzle,
Described self adaptation regulates the lower end of aerofoil to be hinged on the medial surface in vertical smoke-intake pipe road, extend obliquely toward the center position in vertical smoke-intake pipe road upper end, one end of described horizontal cylinder body is positioned at vertical smoke-intake pipe road, the other end is positioned at outside, vertical smoke-intake pipe road, and be positioned at an end opening of the horizontal cylinder body in vertical smoke-intake pipe road, the one end that is positioned at the horizontal cylinder body outside vertical smoke-intake pipe road is provided with ventilative through hole, described horizontal cylinder body medial surface is provided with the first limited block and the second limited block, and the end of the close horizontal cylinder body that is positioned at vertical smoke-intake pipe road of the first limited block,
Described first piston body, the second piston body, air inlet and exhaust outlet are between the first limited block and the second limited block, and first piston body leans near the first limited block, the end that is positioned at the second piston body and horizontal cylinder body in described horizontal cylinder body is provided with Compress Spring, and Compress Spring and the second limited block are positioned at the same side of the second piston body, described self adaptation regulates between aerofoil and first piston body and is connected by second connecting rod, the hinged first piston end of body in one end of second connecting rod, the hinged self adaptation of the other end regulates the top of aerofoil;
In the time that first piston body is resisted against on the first limited block: described air inlet is between first piston body and the second piston body, and the part in described exhaust outlet is hidden by the second piston body envelope;
In the time that the second piston body is resisted against on the second limited block: described air inlet and exhaust outlet are between first piston body and the second piston body.
3. the denitrating system of applying in a kind of pulverized-coal fired boiler according to claim 2, is characterized in that, described self adaptation regulate aerofoil be positioned at corresponding ammonia shower nozzle under.
4. according to the denitrating system of applying in a kind of pulverized-coal fired boiler described in claim 2 or 3, it is characterized in that, described ammonia shower nozzle is positioned at sustained height, and the puff prot of ammonia shower nozzle is communicated with the inner chamber in vertical smoke-intake pipe road, and the import of ammonia shower nozzle is positioned at the outside in vertical smoke-intake pipe road.
5. according to the denitrating system of applying in a kind of pulverized-coal fired boiler described in claim 2 or 3, it is characterized in that, described horizontal cylinder body is along the vertically radially extension in smoke-intake pipe road.
6. according to the denitrating system of applying in a kind of pulverized-coal fired boiler described in claim 2 or 3, it is characterized in that, described ammonia admission line comprises the annular mozzle being set on vertical smoke-intake pipe road and the ammonia-feeding pipe road being connected with annular mozzle, and described air inlet is connected with annular mozzle by the first tube connector.
7. according to the denitrating system of applying in a kind of pulverized-coal fired boiler described in claim 1 or 2 or 3, it is characterized in that, the top edge of described tilt clapboard is near the upper end of flue changeable, and the lower limb of tilt clapboard is near the lower end of flue changeable.
8. according to the denitrating system of applying in a kind of pulverized-coal fired boiler described in claim 1 or 2 or 3, it is characterized in that, described economizer is positioned at the top of air preheater.
9. according to the denitrating system of applying in a kind of pulverized-coal fired boiler described in claim 1 or 2 or 3, it is characterized in that, described the first flue changeable exports the relative both sides that are positioned at flue changeable with the second flue changeable entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010060.2A CN105597530B (en) | 2015-12-29 | 2015-12-29 | A kind of denitrating system applied in pulverized-coal fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010060.2A CN105597530B (en) | 2015-12-29 | 2015-12-29 | A kind of denitrating system applied in pulverized-coal fired boiler |
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| CN107869726A (en) * | 2017-09-30 | 2018-04-03 | 大唐东北电力试验研究所有限公司 | Thermal generation unit denitrating flue gas remodeling method |
| CN109966812A (en) * | 2019-03-29 | 2019-07-05 | 北京国电龙源环保工程有限公司 | A kind of cement kiln end denitrating flue gas and system, the process of waste heat recycling |
| CN115006984A (en) * | 2022-06-14 | 2022-09-06 | 安徽欣创节能环保科技股份有限公司 | Convection type fixed bed desulfurization modular reactor |
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| CN109966812A (en) * | 2019-03-29 | 2019-07-05 | 北京国电龙源环保工程有限公司 | A kind of cement kiln end denitrating flue gas and system, the process of waste heat recycling |
| CN115006984A (en) * | 2022-06-14 | 2022-09-06 | 安徽欣创节能环保科技股份有限公司 | Convection type fixed bed desulfurization modular reactor |
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| CN105597530B (en) | 2017-10-13 |
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