CN107638803A - A kind of system and its operation method of twin furnace synthetic operation full load denitration - Google Patents
A kind of system and its operation method of twin furnace synthetic operation full load denitration Download PDFInfo
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- CN107638803A CN107638803A CN201710862566.9A CN201710862566A CN107638803A CN 107638803 A CN107638803 A CN 107638803A CN 201710862566 A CN201710862566 A CN 201710862566A CN 107638803 A CN107638803 A CN 107638803A
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Abstract
The present invention relates to a kind of system and its operation method of twin furnace synthetic operation full load denitration, including No.1 boiler plant and No. two boiler plants；No. two boiler plants include No. two boilers, No. two economizers, No. two economizer exit flue duct bypass baffle plates, No. two denitrification apparatus inlet flue gas controllable registers, No. two Benitration reactors, No. two air preheater gas approach by-pass dampers and No. two air preheaters.Present system flow is simple, stable, and investment is low with operating cost, do not influence boiler efficiency, it is workable, applicability is respectively provided with to newly-built denitrification apparatus or the transformation of active service denitrification apparatus, therefore with good environmental protection, economic benefit and be widely applied prospect.
Description
Technical field
The invention belongs to industrial waste gas purifying environmental protection and energy field, more particularly to a kind of twin furnace synthetic operation full load to take off
The system and its operation method of nitre.
Background technology
Energy resource structure of the China based on coal will not change within the long duration, therefore, control coal-fired flue-gas NOxDischarge
It is an important process of China's control atmosphere pollution.With NH3For the NO of reducing agentxSCR（SCR）Technology is near
Most widely used, maximally effective coal-fired flue gas denitration technology over year.On the other hand, there is the temperature requirement of operation cigarette in SCR denitration,
Typically at 300-420 DEG C, catalyst inactivation will be caused less than the operation of this temperature range, this results in coal unit in the machine that opens or low
Denitrification apparatus can not be run during load operation, and then qualified discharge can not be realized.Therefore, how effectively to solve SCR denitration device
The problem that puts into operation under the machine that opens and underrun, turn into the important topic in current coal-fired flue gas denitration field.
In view of the above-mentioned problems, the present invention proposes a kind of System and method for of twin furnace synthetic operation full load denitration, i.e., two
Platform stove economizer exit and air preheater entrance set bypass flue respectively, when unit opens machine or underrun, by by portion
Divide or whole gas bypass to adjacent denitrification apparatus carries out denitration, so as to realize unit full load denitration.
Patent related to the present invention, such as CN 201510701175.X ---《The low NO of economizer sectional boiler full loadx
Device and remodeling method》, it is by by economizer step-by-step arrangement, to meet underload denitration service requirement, but for active service machine
Its improvement project amount of group is larger, and due to must take into consideration oepration at full load overtemperatute, its underload test limited extent can not
Realize the denitration operation for opening the machine stage.
Patent related to the present invention, such as the U of CN 204962817 ---《The SCR denitrating flue gas system that full load mode puts into operation
System》, it is that combustion-compensating device is set on the denitration flue between boiler economizer and SCR flue gas denitration reactors, is filled by afterburning
The flue-gas temperature during raising ignition of the boiler to minimum steady fires the non-steady combustion load under load condition is put, so as to realize boiler from point
Fire is to the full load denitrating flue gas under any load of 100%BMCR operating modes.But due to needing excessive fuel consumption to improve cigarette temperature, deposit
Operating cost is higher the problem of.
The content of the invention
It is an object of the invention to overcome above shortcomings in the prior art, and offer is a kind of reasonable in design,
Taken off for current SCR denitration device in the machine that opens and the twin furnace synthetic operation full load for the problem that can not be put into operation during underrun
The system and its operation method of nitre.
Technical scheme is used by the present invention solves the above problems：A kind of twin furnace synthetic operation full load denitration is
System, it is characterised in that：Including No.1 boiler plant and No. two boiler plants；
No.1 boiler plant includes No.1 boiler, No.1 economizer, No.1 economizer exit flue duct bypass baffle plate, No.1 denitration dress
Posting port gas proportioning damper, No.1 Benitration reactor, No.1 air preheater gas approach by-pass damper and No.1 air preheater, No.1
Boiler, No.1 economizer, No.1 denitrification apparatus inlet flue gas controllable register, No.1 Benitration reactor and No.1 air preheater are along flue gas
Flow direction is set gradually, and No.1 boiler is communicated with No.1 flue, No.1 economizer, No.1 denitrification apparatus inlet flue gas regulation gear
Plate, No.1 Benitration reactor and No.1 air preheater are arranged in No.1 flue, and No.1 economizer exit flue duct bypass baffle plate is set
Put between No.1 economizer and No.1 denitrification apparatus inlet flue gas controllable register, No.1 air preheater gas approach by-pass damper is set
Put between No.1 Benitration reactor and No.1 air preheater；No.1 opening and No. two openings are provided with No.1 flue, No.1 saves
Coal device exhaust pass by-pass damper is arranged in No.1 opening, and No.1 air preheater gas approach by-pass damper is arranged on No. two openings
On；
No. two boiler plants include No. two boilers, No. two economizers, No. two economizer exit flue duct bypass baffle plates, No. two denitration dresses
Posting port gas proportioning damper, No. two Benitration reactors, No. two air preheater gas approach by-pass dampers and No. two air preheaters, No. two
Boiler, No. two economizers, No. two denitrification apparatus inlet flue gas controllable registers, No. two Benitration reactors and No. two air preheaters are along flue gas
Flow direction is set gradually, and No. two boilers are communicated with No. two flues, No. two economizers, No. two denitrification apparatus inlet flue gas regulation gears
Plate, No. two Benitration reactors and No. two air preheaters are arranged in No. two flues, and No. two economizer exit flue duct bypass baffle plates are set
Put between No. two economizers and No. two denitrification apparatus inlet flue gas controllable registers, No. two air preheater gas approach by-pass dampers are set
Put between No. two Benitration reactors and No. two air preheaters；No. three openings and No. four openings, No. two provinces are provided with No. two flues
Coal device exhaust pass by-pass damper is arranged in No. three openings, and No. two air preheater gas approach by-pass dampers are arranged on No. four openings
On；
Connected between No.1 opening and No. three openings by No. three flues, pass through No. four flues between No. two openings and No. four openings
Connection.No. three flues and No. four flues are gas bypass.
Economizer exit bypass flue gas proportioning damper is provided with No. three flues of the present invention, is set in No. four flues
It is equipped with air preheater entrance bypass flue gas proportioning damper.
A kind of operation method of the system of twin furnace synthetic operation full load denitration, it is characterised in that：
Flue gas caused by No.1 boiler takes off by No.1 economizer, No.1 denitrification apparatus inlet flue gas controllable register, No.1 successively
Nitre reactor and No.1 air preheater and then discharge；
Flue gas caused by No. two boilers takes off by No. two economizers, No. two denitrification apparatus inlet flue gas controllable registers, No. two successively
Nitre reactor and No. two air preheaters and then discharge；
When No.1 boiler is heavy-duty service and No. two boilers are Qi Jishi, pass through No. three flues going out No. two economizers first
Before the flue gas of mouth leads to No.1 Benitration reactor, flue gas is after No.1 Benitration reactor carries out denitration reaction, then passes through tune
Section one
The aperture of number air preheater gas approach by-pass damper and No. two air preheater gas approach by-pass dampers, by the portion of No.1 boiler
Divide cigarette
Qi leel flow to the entrance of No. two air preheaters, so as to realize the denitrating flue gas for opening the machine stage in No. two boilers；
When No.1 boiler is heavy-duty service, No. two boilers are underrun and flue gas is unsatisfactory for denitration service requirement, lead to
The aperture of No.1 economizer exit flue duct bypass baffle plate and No. two economizer exit flue duct bypass baffle plates is overregulated, while regulation is drawn
Blower fan is contributed, and the partial fume of No.1 boiler is led to the outlet of No. two economizers, mixed with the flue gas of No. two boilers to improve
The cigarette temperature of No. two boilers, in No. two Benitration reactors after denitration reaction, then by adjusting No.1 air preheater gas approach
The aperture of by-pass damper and No. two air preheater gas approach by-pass dampers, by the porch smoke backflow of No. two air preheaters to No.1
The entrance of air preheater, so as to meet denitration requirement of No. two boilers under underrun；
When No. two boilers are heavy-duty service and No.1 boiler is Qi Jishi, pass through No. three flues going out No.1 economizer first
Before the flue gas of mouth leads to No. two Benitration reactors, flue gas is after No. two Benitration reactors carry out denitration reaction, then passes through tune
Section two
The aperture of number air preheater gas approach by-pass damper and No.1 air preheater gas approach by-pass damper, by the portion of No. two boilers
Divide cigarette
Qi leel flow to the entrance of No.1 air preheater, so as to realize the denitrating flue gas for opening the machine stage in No.1 boiler；
When No. two boilers are heavy-duty service, No.1 boiler is underrun and flue gas is unsatisfactory for denitration service requirement, lead to
The aperture of No. two economizer exit flue duct bypass baffle plates and No.1 economizer exit flue duct bypass baffle plate is overregulated, while regulation is drawn
Blower fan is contributed, and the partial fume of No. two boilers is led to the outlet of No.1 economizer, mixed with the flue gas of No.1 boiler to improve
The cigarette temperature of No.1 boiler, in No.1 Benitration reactor after denitration reaction, then by adjusting No. two air preheater gas approach
The aperture of by-pass damper and No.1 air preheater gas approach by-pass damper, by the porch smoke backflow of No.1 air preheater to No. two
The entrance of air preheater, so as to meet denitration requirement of the No.1 boiler under underrun.
The present invention is in regulation No.1 economizer exit flue duct bypass baffle plate and No. two economizer exit flue duct bypass baffle plates
While aperture, the aperture of economizer exit bypass flue gas proportioning damper is adjusted；
While the aperture of No.1 air preheater gas approach by-pass damper and No. two air preheater gas approach by-pass dampers is adjusted,
Adjust the aperture of air preheater entrance bypass flue gas proportioning damper.
The design discharge of No. three flues of the invention and No. four flues need to carry out core according to concrete engineering technical parameter with requiring
Calculate, in actual motion by monitoring the flow of No. three flues and the flow of No. four flues, and No.1 Benitration reactor enters
The inlet flue gas temperature of mouth gentle No. two Benitration reactors of cigarette, to No.1 economizer exit flue duct bypass baffle plate, No.1 air preheater entrance
Flue duct bypass baffle plate, No. two economizer exit flue duct bypass baffle plates and No. two air preheater gas approach by-pass dampers be adjusted with
Meet operation demand.
Compared with prior art, present system flow is simple, stable by the present invention, and investment is low with operating cost, not shadow
Boiler efficiency is rung, it is workable, applicability is respectively provided with to newly-built denitrification apparatus or the transformation of active service denitrification apparatus, therefore with good
Good environmental protection, economic benefit and it is widely applied prospect.The present invention passes through the economizer exit and air preheater entrance in two stoves
Bypass flue is set respectively, when unit opens machine or underrun, by by part or all of gas bypass to adjacent denitration
Device carries out denitration, so as to realize unit full load denitration.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram of the embodiment of the present invention 1 and 2.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, and following examples are to this hair
Bright explanation and the invention is not limited in following examples.
Embodiment 1.
Referring to Fig. 1.
The present embodiment is a kind of system of twin furnace synthetic operation full load denitration, including No.1 boiler plant and No. two boilers
Device.
No.1 boiler plant include No.1 boiler 11, No.1 economizer 12, No.1 economizer exit flue duct bypass baffle plate 13,
No.1 denitrification apparatus inlet flue gas controllable register 14, No.1 Benitration reactor 15, No.1 air preheater gas approach by-pass damper 16
With No.1 air preheater 17, No.1 boiler 11, No.1 economizer 12, No.1 denitrification apparatus inlet flue gas controllable register 14, No.1 take off
Nitre reactor 15 and No.1 air preheater 17 are set gradually along flow of flue gas direction, and No.1 boiler 11 is communicated with No.1 flue, No.1
Economizer 12, No.1 denitrification apparatus inlet flue gas controllable register 14, No.1 Benitration reactor 15 and No.1 air preheater 17 are respectively provided with
In No.1 flue, No.1 economizer exit flue duct bypass baffle plate 13 is arranged on No.1 economizer 12 and No.1 denitrification apparatus entrance
Between gas proportioning damper 14, No.1 air preheater gas approach by-pass damper 16 is arranged on No.1 Benitration reactor 15 and No.1 is empty
Between pre- device 17；No.1 opening and No. two openings are provided with No.1 flue, No.1 economizer exit flue duct bypass baffle plate 13 is set
Put in No.1 opening, No.1 air preheater gas approach by-pass damper 16 is arranged in No. two openings.
No. two boiler plants include No. two economizer 22, two of boiler 21, two economizer exit flue duct bypass baffle plates 23,
No. two air preheater gas approach by-pass dampers 26 of Benitration reactor 25, two of denitrification apparatus inlet flue gas controllable register 24, two
It is de- with No. two air preheaters 27, No. two economizer 22, two of boiler 21, two denitrification apparatus inlet flue gas controllable registers 24, two
Nitre reactor 25 and No. two air preheaters 27 are set gradually along flow of flue gas direction, and No. two boilers 21 are communicated with No. two flues, No. two
The Benitration reactor 25 of denitrification apparatus inlet flue gas controllable register 24, two of economizer 22, two and No. two air preheaters 27 are respectively provided with
In No. two flues, No. two economizer exit flue duct bypass baffle plates 23 are arranged on No. two economizers 22 and No. two denitrification apparatus entrances
Between gas proportioning damper 24, No. two air preheater gas approach by-pass dampers 26 are arranged on No. two Benitration reactors 25 and No. two skies
Between pre- device 27；No. three openings and No. four openings are provided with No. two flues, No. two economizer exit flue duct bypass baffle plates 23 are set
Put in No. three openings, No. two air preheater gas approach by-pass dampers 26 are arranged in No. four openings.
Connected between No.1 opening and No. three openings by No. three flues, pass through No. four between No. two openings and No. four openings
Flue connects.No. three flues and No. four flues are gas bypass.
Preferably, being provided with economizer exit bypass flue gas proportioning damper 8 in No. three flues, set in No. four flues
It is equipped with air preheater entrance bypass flue gas proportioning damper 9.
The present embodiment additionally provides the operation method of the system of twin furnace synthetic operation full load denitration, and its specific steps is such as
Under：
Flue gas caused by No.1 boiler 11 successively by No.1 economizer 12, No.1 denitrification apparatus inlet flue gas controllable register 14,
No.1 Benitration reactor 15 and No.1 air preheater 17 and then discharge；Flue gas caused by No. two boilers 21 is successively by No. two provinces
The Benitration reactor 25 of denitrification apparatus inlet flue gas controllable register 24, two of coal device 22, two and No. two air preheaters 27 and then discharge.
When No.1 boiler 11 is heavy-duty service and No. two boilers 21 are Qi Jishi, flue gas caused by No. two boilers 21 leaves
Two
Number boiler 21 initially enters No. two economizers 22 and exchanged heat, and opens 13, No. two provinces of No.1 economizer exit flue duct bypass baffle plate
Coal device exhaust pass by-pass damper 23, No.1 denitrification apparatus inlet flue gas controllable register 14 and economizer exit bypass flue flue gas
Controllable register 8, No. two denitrification apparatus inlet flue gas controllable registers 24 are closed, by No. three flues first by No. two economizers 22
The flue gas of outlet mixes before leading to No.1 Benitration reactor 15 with the flue gas in No.1 flue, then in No.1 Benitration reactor 15
Middle carry out denitration reaction, then open No.1 air preheater gas approach by-pass damper 16 and No. two air preheater gas approach by-pass dampers
26, the aperture of regulation air preheater entrance bypass flue gas proportioning damper 9, the partial fume of No.1 boiler 11 is branched to No. two
The entrance of air preheater 27, so as to realize the denitrating flue gas for opening the machine stage in No. two boilers 21.
When No.1 boiler 11 is heavy-duty service, No. two boilers 21 are underrun and flue gas be unsatisfactory for denitration operation will
When asking, flue gas caused by No.1 boiler 11 leaves No.1 boiler 11, is exchanged heat into No.1 economizer 12, opens No.1 and saves coal
Device exhaust pass by-pass damper 13 and No. two economizer exit flue duct bypass baffle plates 23, while adjust No.1 denitrification apparatus entrance cigarette
14, No. two denitrification apparatus inlet flue gas controllable registers 24 of gas controllable register and economizer exit bypass flue gas proportioning damper 8
Aperture, while adjust air-introduced machine output, the partial fume of No.1 boiler 11 is led to the outlet of No. two economizers 22, with No. two
The flue gas of boiler 21 is mixed to improve the cigarette temperature of No. two boilers 21, in No. two Benitration reactors 25 after denitration reaction, then
By opening No.1 air preheater gas approach by-pass damper 16 and No. two air preheater gas approach by-pass dampers 26, air preheater is adjusted
The aperture of entrance bypass flue gas proportioning damper 9, by the porch smoke backflow of No. two air preheaters 27 to No.1 air preheater 17
Entrance, so as to meet denitration requirement of No. two boilers 21 under underrun.
The design discharge of No. three flues and No. four flues need to be adjusted according to concrete engineering technical parameter with requirement, in reality
Pass through the flow of No. three flues of monitoring and the flow of No. four flues, and the inlet flue gas temperature of No.1 Benitration reactor 15 in the operation of border
With the inlet flue gas temperature of No. two Benitration reactors 25, to No.1 economizer exit flue duct bypass baffle plate 13, No.1 air preheater entrance cigarette
16, No. two economizer exit flue duct bypass baffle plates 23 of road by-pass damper and No. two air preheater gas approach by-pass dampers 26 are adjusted
Save to meet operation demand.
It should be noted that high load capacity and underload are defined according to actual demand, those skilled in the art can
To need to be judged according to itself, the implementation of the present embodiment will not be had an impact.
Embodiment 2.
Referring to Fig. 1.
The present embodiment is a kind of system of twin furnace synthetic operation full load denitration, including No.1 boiler plant and No. two boilers
Device.
No.1 boiler plant include No.1 boiler 11, No.1 economizer 12, No.1 economizer exit flue duct bypass baffle plate 13,
No.1 denitrification apparatus inlet flue gas controllable register 14, No.1 Benitration reactor 15, No.1 air preheater gas approach by-pass damper 16
With No.1 air preheater 17, No.1 boiler 11, No.1 economizer 12, No.1 denitrification apparatus inlet flue gas controllable register 14, No.1 take off
Nitre reactor 15 and No.1 air preheater 17 are set gradually along flow of flue gas direction, and No.1 boiler 11 is communicated with No.1 flue, No.1
Economizer 12, No.1 denitrification apparatus inlet flue gas controllable register 14, No.1 Benitration reactor 15 and No.1 air preheater 17 are respectively provided with
In No.1 flue, No.1 economizer exit flue duct bypass baffle plate 13 is arranged on No.1 economizer 12 and No.1 denitrification apparatus entrance
Between gas proportioning damper 14, No.1 air preheater gas approach by-pass damper 16 is arranged on No.1 Benitration reactor 15 and No.1 is empty
Between pre- device 17；No.1 opening and No. two openings are provided with No.1 flue, No.1 economizer exit flue duct bypass baffle plate 13 is set
Put in No.1 opening, No.1 air preheater gas approach by-pass damper 16 is arranged in No. two openings.
No. two boiler plants include No. two economizer 22, two of boiler 21, two economizer exit flue duct bypass baffle plates 23,
No. two air preheater gas approach by-pass dampers 26 of Benitration reactor 25, two of denitrification apparatus inlet flue gas controllable register 24, two
It is de- with No. two air preheaters 27, No. two economizer 22, two of boiler 21, two denitrification apparatus inlet flue gas controllable registers 24, two
Nitre reactor 25 and No. two air preheaters 27 are set gradually along flow of flue gas direction, and No. two boilers 21 are communicated with No. two flues, No. two
The Benitration reactor 25 of denitrification apparatus inlet flue gas controllable register 24, two of economizer 22, two and No. two air preheaters 27 are respectively provided with
In No. two flues, No. two economizer exit flue duct bypass baffle plates 23 are arranged on No. two economizers 22 and No. two denitrification apparatus entrances
Between gas proportioning damper 24, No. two air preheater gas approach by-pass dampers 26 are arranged on No. two Benitration reactors 25 and No. two skies
Between pre- device 27；No. three openings and No. four openings are provided with No. two flues, No. two economizer exit flue duct bypass baffle plates 23 are set
Put in No. three openings, No. two air preheater gas approach by-pass dampers 26 are arranged in No. four openings.
Connected between No.1 opening and No. three openings by No. three flues, pass through No. four between No. two openings and No. four openings
Flue connects.No. three flues and No. four flues are gas bypass.
Preferably, being provided with economizer exit bypass flue gas proportioning damper 8 in No. three flues, set in No. four flues
It is equipped with air preheater entrance bypass flue gas proportioning damper 9.
The present embodiment additionally provides the operation method of the system of twin furnace synthetic operation full load denitration, and its specific steps is such as
Under：
Flue gas caused by No.1 boiler 11 successively by No.1 economizer 12, No.1 denitrification apparatus inlet flue gas controllable register 14,
No.1 Benitration reactor 15 and No.1 air preheater 17 and then discharge；Flue gas caused by No. two boilers 21 is successively by No. two provinces
The Benitration reactor 25 of denitrification apparatus inlet flue gas controllable register 24, two of coal device 22, two and No. two air preheaters 27 and then discharge.
When No. two boilers 21 are heavy-duty service and No.1 boiler 11 is Qi Jishi, flue gas caused by No.1 boiler 11 leaves
One
Number boiler 11 initially enters No.1 economizer 12 and exchanged heat, and opens 13, No. two provinces of No.1 economizer exit flue duct bypass baffle plate
23, No. two denitrification apparatus inlet flue gas controllable registers 24 of coal device exhaust pass by-pass damper and economizer exit bypass flue flue gas
Controllable register 8, No.1 denitrification apparatus inlet flue gas controllable register 14 is closed, by No. three flues first by No.1 economizer 12
The flue gas of outlet mixes before leading to No. two Benitration reactors 25 with the flue gas in No. two flues, then in No. two Benitration reactors 25
Middle carry out denitration reaction, then open No.1 air preheater gas approach by-pass damper 16 and No. two air preheater gas approach by-pass dampers
26, the aperture of regulation air preheater entrance bypass flue gas proportioning damper 9, the partial fume of No. two boilers 21 is branched into No.1
The entrance of air preheater 17, so as to realize the denitrating flue gas for opening the machine stage in No.1 boiler 11.
When No. two boilers 21 are heavy-duty service, No.1 boiler 11 is underrun and flue gas be unsatisfactory for denitration operation will
When asking, flue gas caused by No. two boilers 21 leaves No. two boilers 21, is exchanged heat into No. two economizers 22, opens No.1 and saves coal
Device exhaust pass by-pass damper 13 and No. two economizer exit flue duct bypass baffle plates 23, while adjust No.1 denitrification apparatus entrance cigarette
14, No. two denitrification apparatus inlet flue gas controllable registers 24 of gas controllable register and economizer exit bypass flue gas proportioning damper 8
Aperture, while adjust air-introduced machine output, the partial fume of No. two boilers 21 is led to the outlet of No.1 economizer 12, with No.1
The flue gas of boiler 11 is mixed to improve the cigarette temperature of No.1 boiler 11, in No.1 Benitration reactor 15 after denitration reaction, then
By opening No.1 air preheater gas approach by-pass damper 16 and No. two air preheater gas approach by-pass dampers 26, air preheater is adjusted
The aperture of entrance bypass flue gas proportioning damper 9, by the porch smoke backflow of No.1 air preheater 17 to No. two air preheaters 27
Entrance, so as to meet denitration requirement of the No.1 boiler 11 under underrun.
The design discharge of No. three flues and No. four flues need to be adjusted according to concrete engineering technical parameter with requirement, in reality
Pass through the flow of No. three flues of monitoring and the flow of No. four flues, and the inlet flue gas temperature of No.1 Benitration reactor 15 in the operation of border
With the inlet flue gas temperature of No. two Benitration reactors 25, to No.1 economizer exit flue duct bypass baffle plate 13, No.1 air preheater entrance cigarette
16, No. two economizer exit flue duct bypass baffle plates 23 of road by-pass damper and No. two air preheater gas approach by-pass dampers 26 are adjusted
Save to meet operation demand.
It should be noted that high load capacity and underload are defined according to actual demand, those skilled in the art can
To need to be judged according to itself, the implementation of the present embodiment will not be had an impact.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, it is named
Title etc. can be different, and the above content described in this specification is only to structure example explanation of the present invention.It is all according to
The equivalence changes or simple change done according to the construction described in inventional idea of the present invention, feature and principle, are included in this hair
In the protection domain of bright patent.Those skilled in the art can do various to described specific embodiment
The modification of various kinds or supplement are substituted using similar mode, without departing from structure of the invention or surmount present claims
Scope defined in book, protection scope of the present invention all should be belonged to.
Claims (5)
- A kind of 1. system of twin furnace synthetic operation full load denitration, it is characterised in that：Including No.1 boiler plant and No. two boilers Device；No.1 boiler plant includes No.1 boiler, No.1 economizer, No.1 economizer exit flue duct bypass baffle plate, No.1 denitration Device portal gas proportioning damper, No.1 Benitration reactor, No.1 air preheater gas approach by-pass damper and No.1 air preheater, one Number boiler, No.1 economizer, No.1 denitrification apparatus inlet flue gas controllable register, No.1 Benitration reactor and No.1 air preheater are along cigarette Flow of air direction is set gradually, and No.1 boiler is communicated with No.1 flue, No.1 economizer, the regulation of No.1 denitrification apparatus inlet flue gas Baffle plate, No.1 Benitration reactor and No.1 air preheater are arranged in No.1 flue, No.1 economizer exit flue duct bypass baffle plate It is arranged between No.1 economizer and No.1 denitrification apparatus inlet flue gas controllable register, No.1 air preheater gas approach by-pass damper It is arranged between No.1 Benitration reactor and No.1 air preheater；No.1 opening and No. two openings, No.1 are provided with No.1 flue In No.1 opening, No.1 air preheater gas approach by-pass damper is arranged on No. two and opened economizer exit flue duct bypass baffle plate setting On mouth；No. two boiler plants include No. two boilers, No. two economizers, No. two economizer exit flue duct bypass baffle plates, No. two denitration dresses Posting port gas proportioning damper, No. two Benitration reactors, No. two air preheater gas approach by-pass dampers and No. two air preheaters, No. two Boiler, No. two economizers, No. two denitrification apparatus inlet flue gas controllable registers, No. two Benitration reactors and No. two air preheaters are along flue gas Flow direction is set gradually, and No. two boilers are communicated with No. two flues, No. two economizers, No. two denitrification apparatus inlet flue gas regulation gears Plate, No. two Benitration reactors and No. two air preheaters are arranged in No. two flues, and No. two economizer exit flue duct bypass baffle plates are set Put between No. two economizers and No. two denitrification apparatus inlet flue gas controllable registers, No. two air preheater gas approach by-pass dampers are set Put between No. two Benitration reactors and No. two air preheaters；No. three openings and No. four openings, No. two provinces are provided with No. two flues Coal device exhaust pass by-pass damper is arranged in No. three openings, and No. two air preheater gas approach by-pass dampers are arranged on No. four openings On；Connected between No.1 opening and No. three openings by No. three flues, pass through No. four flues between No. two openings and No. four openings Connection.
- 2. the system of twin furnace synthetic operation full load denitration according to claim 1, it is characterised in that：No. three flues Economizer exit bypass flue gas proportioning damper is inside provided with, air preheater entrance bypass flue flue gas is provided with No. four flues Controllable register.
- 3. a kind of operation method of the system of twin furnace synthetic operation full load denitration as claimed in claim 1 or 2, its feature exist In：Flue gas caused by No.1 boiler is successively by No.1 economizer, No.1 denitrification apparatus inlet flue gas controllable register, No.1 denitration Reactor and No.1 air preheater and then discharge；Flue gas caused by No. two boilers takes off by No. two economizers, No. two denitrification apparatus inlet flue gas controllable registers, No. two successively Nitre reactor and No. two air preheaters and then discharge；When No.1 boiler is heavy-duty service and No. two boilers are Qi Jishi, pass through No. three flues going out No. two economizers first Before the flue gas of mouth leads to No.1 Benitration reactor, flue gas is after No.1 Benitration reactor carries out denitration reaction, then passes through regulation one The aperture of number air preheater gas approach by-pass damper and No. two air preheater gas approach by-pass dampers, by the part cigarette of No.1 boiler Qi leel flow to the entrance of No. two air preheaters, so as to realize the denitrating flue gas for opening the machine stage in No. two boilers；When No.1 boiler is heavy-duty service, No. two boilers are underrun and flue gas is unsatisfactory for denitration service requirement, lead to The aperture of No.1 economizer exit flue duct bypass baffle plate and No. two economizer exit flue duct bypass baffle plates is overregulated, while regulation is drawn Blower fan is contributed, and the partial fume of No.1 boiler is led to the outlet of No. two economizers, mixed with the flue gas of No. two boilers to improve The cigarette temperature of No. two boilers, in No. two Benitration reactors after denitration reaction, then by adjusting No.1 air preheater gas approach The aperture of by-pass damper and No. two air preheater gas approach by-pass dampers, by the porch smoke backflow of No. two air preheaters to No.1 The entrance of air preheater, so as to meet denitration requirement of No. two boilers under underrun；When No. two boilers are heavy-duty service and No.1 boiler is Qi Jishi, pass through No. three flues going out No.1 economizer first Before the flue gas of mouth leads to No. two Benitration reactors, flue gas is after No. two Benitration reactors carry out denitration reaction, then passes through regulation two The aperture of number air preheater gas approach by-pass damper and No.1 air preheater gas approach by-pass damper, by the part cigarette of No. two boilers Qi leel flow to the entrance of No.1 air preheater, so as to realize the denitrating flue gas for opening the machine stage in No.1 boiler；When No. two boilers are heavy-duty service, No.1 boiler is underrun and flue gas is unsatisfactory for denitration service requirement, lead to The aperture of No. two economizer exit flue duct bypass baffle plates and No.1 economizer exit flue duct bypass baffle plate is overregulated, while regulation is drawn Blower fan is contributed, and the partial fume of No. two boilers is led to the outlet of No.1 economizer, mixed with the flue gas of No.1 boiler to improve The cigarette temperature of No.1 boiler, in No.1 Benitration reactor after denitration reaction, then by adjusting No. two air preheater gas approach The aperture of by-pass damper and No.1 air preheater gas approach by-pass damper, by the porch smoke backflow of No.1 air preheater to No. two The entrance of air preheater, so as to meet denitration requirement of the No.1 boiler under underrun.
- 4. the operation method of the system of twin furnace synthetic operation full load denitration according to claim 3, it is characterised in that：While the aperture of No.1 economizer exit flue duct bypass baffle plate and No. two economizer exit flue duct bypass baffle plates is adjusted, Adjust the aperture of economizer exit bypass flue gas proportioning damper；While the aperture of No.1 air preheater gas approach by-pass damper and No. two air preheater gas approach by-pass dampers is adjusted, Adjust the aperture of air preheater entrance bypass flue gas proportioning damper.
- 5. the operation method of the system of twin furnace synthetic operation full load denitration according to claim 4, it is characterised in that：Three The design discharge of number flue and No. four flues need to be adjusted according to concrete engineering technical parameter with requirement, be led in actual motion Cross the flow of No. three flues of monitoring and the flow of No. four flues, and the inlet flue gas temperature of No.1 Benitration reactor and No. two denitrations it is anti- The inlet flue gas temperature of device is answered, to No.1 economizer exit flue duct bypass baffle plate, No.1 air preheater gas approach by-pass damper, No. two provinces Coal device exhaust pass by-pass damper and No. two air preheater gas approach by-pass dampers are adjusted to meet operation demand.
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| CN109603528A (en) * | 2018-12-31 | 2019-04-12 | 华电电力科学研究院有限公司 | A kind of denitrating system and its working method of multi-stage reacting device |
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