CN205007743U - Flue flue gas preprocessing device and flue gas denitration device - Google Patents
Flue flue gas preprocessing device and flue gas denitration device Download PDFInfo
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- CN205007743U CN205007743U CN201520643301.6U CN201520643301U CN205007743U CN 205007743 U CN205007743 U CN 205007743U CN 201520643301 U CN201520643301 U CN 201520643301U CN 205007743 U CN205007743 U CN 205007743U
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- flue gas
- pretreatment unit
- flue
- gas pretreatment
- dividing plate
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- Chimneys And Flues (AREA)
Abstract
The utility model provides a flue flue gas preprocessing device and a flue gas denitration device. Flue flue gas preprocessing device's technical scheme is: a flue flue gas preprocessing device, includes air inlet, the gas outlet at box and box both ends, the housing is internally provided with separator plates. The vertical direction of baffle runs through whole box, and the horizontal cross -section is the S -shaped corrugate, and the ripple trend is on a parallel with flue gas circulation direction, the box below is equipped with the ash bucket. The technical scheme that the flue gas denitration device was taked is: include foretell flue flue gas preprocessing device and boiler economizer, reactor, flue flue gas preprocessing device through piping erection between boiler economizer and reactor. The flue gas is when circulating between the baffle, and under the interception effect of S -shaped ripple corrugated surface, the gas flow reduces to continuous change, the velocity of flow, is caught the large granule dust subsides the ash bucket with the flue gas separation under gravity and inertial effect in and collects, reduces the catalyst and easily stops up the probability, increases reactor life, reduces the denitration cost.
Description
Technical field
The utility model relates to a kind of flue gas pretreatment unit and a kind of equipment for denitrifying flue gas, particularly relates to a kind of pretreatment unit and the denitrification apparatus that can be used for high-temperature flue gas in flue.
Background technology
Thermal power plant originates, to the economic development important role of China as the main electric power energy supply of China.But a large amount of nitrogen oxide (NO can be produced in thermal power plant coal combustion process
x), oxysulfide (SO
x) and dust, very easily pollute environment, therefore current power plant mostly of China all takes corresponding measure to carry out Control pollution.
At present, to the Environmental capacity of nitrogen oxide in boiler smoke, adopt selective catalytic reduction (English SelectiveCatalystReduction, is abbreviated as SCR) gas denitrifying technology more.Selective catalytic reduction (SCR) denitration technology refers under the effect of catalyst, and reducing agent (liquefied ammonia) generates harmless nitrogen and water with the reaction of nitrogen oxides in flue gas, thus removes the NO in flue gas
x.Selectively refer to reducing agent NH
3with the NO in flue gas
xthere is reduction reaction, and do not react with the oxygen in flue gas.
Existing SCR flue-gas denitration process arrangement is that SCR reactor is arranged between boiler economizer and air preheater, and flue gas is after boiler economizer, and enter air preheater again by SCR reactor, dust content is higher, SO
xconcentration is higher.
There is the characteristic of ash-rich in the ature of coal of China, after burning, exhaust gas dust concentration is higher, has the following disadvantages in traditional SCR denitrating flue gas process at present:
1, dust concentration is higher, the NH that denitration reaction leaks
3with S0
3and H
20 can generate the materials such as ammonium hydrogen sulfate, this material has larger viscosity, and dust can be made to assemble at air preheater surfaces, causes dirt and the corrosion of air preheater, cause the blocking of air preheater, add cleaning frequency and the operating cost of high air preheater;
2, in order to reduce the probability of catalyst blockage, generally need to select large aperture catalyst, thus catalyst volume can be caused comparatively large, add SCR project investment cost;
3, flue gas is without pretreatment, and the dust content in flue gas is high, easy blocking catalyst, once catalyst blockage will blowing out, loses huge, and operating cost increases;
4, containing calcium oxide, alkaline matter etc., catalyst is harmful in dust, easily causes catalyst abrasion, shorten catalyst service life.
In order to reduce the dust content in flue gas, particularly big dust particle is to the negative effect of catalyst, select the effective mode big dust particle of dispelling in flue gas to be to the effective Optimized Measures of the one of SCR denitration system, can have great significance to stable, reliable, the economical operation of denitrating system after increasing pretreatment unit.Before entering SCR reactor, install pretreatment unit additional, the operation of follow-up system can be made to be greatly improved.
Summary of the invention
The utility model provides a kind of flue gas pretreatment unit and a kind of equipment for denitrifying flue gas for solving above technical problem.
The technical scheme that the utility model flue gas pretreatment unit is taked is: a kind of flue gas pretreatment unit, comprises the air inlet of casing and tank ends, gas outlet; Dividing plate is provided with in described casing; Described dividing plate vertical direction runs through whole described casing, and horizontal cross-section is S shape corrugated, and ripple trend is parallel to flue gas circulating direction; Ash bucket is provided with below described casing.
In order to reduce the pressure loss, described dividing plate is parallel, interval, setting straggly in the horizontal plane.
In order to reduce the pressure loss further, described dividing plate becomes multiple row to arrange in order, and adjacent column space bar staggers mutually.
As preferably, often arranging the adjacent, parallel baffle interval distance of described diaphragm internal is 200 ~ 500mm.
As preferably, the described baffle interval distance of adjacent two row is 300 ~ 800mm.
For the ease of collection and the discharge of dust, described ash bucket is inverted-cone shape.
The technical scheme that the utility model equipment for denitrifying flue gas is taked is: comprise above-mentioned flue gas pretreatment unit and boiler economizer, reactor; Described flue gas pretreatment unit by Pipe installing between described boiler economizer and reactor.
As required, described in described equipment for denitrifying flue gas, flue gas pretreatment unit can singlely be arranged, also can be multiple in multistage flue gas pretreatment unit along the series connection of flue gas circulating direction.
The advantage that the utility model has and good effect are: because the utility model adopts as above technical scheme, when flue gas circulates between dividing plate, under the interception function of S shape ripple male and fomale(M&F), gas flow constantly changes, flow velocity reduces, and big dust particle is captured and collects under the effect of gravity and inertia with in flue gas separate and subside to ash bucket, the easy blocking probability of reduction catalyst, increase reactor service life, reduce denitration cost; Flue gas pressures loss is simultaneously less, less to the negative effect of follow-up system; In addition, the utility model structure is simple, easy for installation, is convenient to safeguard.
Except technical problem, the technical characteristic forming technical scheme and the advantage brought by the technical characteristic of these technical schemes that the utility model described above solves, the advantage that the other technologies feature comprised in the other technologies problem that the utility model can solve, technical scheme and these technical characteristics bring, will be described in further detail hereinafter by reference to the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of flue gas pretreatment unit in the utility model embodiment 1;
Fig. 2 is Fig. 1 plan structure schematic diagram;
Fig. 3 is flue gas pretreatment unit plan structure schematic diagram in the utility model embodiment 2;
Fig. 4 is equipment for denitrifying flue gas plan structure schematic diagram in the utility model embodiment 3.
In figure: 1, air inlet; 2, casing; 3, ash bucket; 4, gas outlet; 5, dividing plate; 6, boiler economizer; 7, reactor.
Detailed description of the invention
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to describe in detail.It should be noted that at this, just can mutually combine as long as technical characteristic involved in each embodiment of the utility model described below does not form conflict each other.
Embodiment 1
As depicted in figs. 1 and 2, in the present embodiment, flue gas pretreatment unit comprises casing 2, and the casing 2 of pretreatment unit is arranged in horizontal flue, and casing 2 two ends arrange air inlet 1 and gas outlet 4 respectively, air inlet 1 and gas outlet 4 and casing 2 compact siro spinning technology, No leakage.Vertical dividing plate 5 is provided with in casing 2, parallel between dividing plate 5, interval, setting straggly, arrange in order in multiple row, adjacent two row dividing plates 5 stagger mutually, its setting direction is parallel with flow of flue gas direction, often the spacing distance of inner adjacent two parallel baffles 5 of row is 200 ~ 500mm, the spacing distance of adjacent two row dividing plates 5 is 300 ~ 800mm, and two surfaces of each dividing plate 5 are the concavo-convex surface of S shape ripple, on same arbitrary section, S shape dividing plate 5 concave and convex direction is consistent, and the trend of ripple is parallel with flue gas circulating direction.Ash bucket 3 is equipped with in the bottom of pretreatment unit, and ash bucket 3 connects without leak source with casing 2 is closely knit, and ash bucket 3 is tapered, is convenient to collect dust and discharge.
When the present embodiment median septum 5 arrangement mode makes pretreatment, flue gas pressures loss is less, less to the negative effect of follow-up system.
Embodiment 2
As shown in Figure 3, in the present embodiment, flue gas pretreatment unit comprises casing 2, and the casing 2 of pretreatment unit is arranged in horizontal flue, and casing 2 two ends arrange air inlet 1 and gas outlet 4 respectively, air inlet 1 and gas outlet 4 and casing 2 compact siro spinning technology, No leakage.Vertical dividing plate 5 is provided with in casing 2, parallel between dividing plate 5, interval, setting straggly, in unordered setting, its dividing plate 5 bearing of trend is parallel with flow of flue gas direction, and two surfaces of each dividing plate 5 are the concavo-convex surface of S shape ripple, on same arbitrary section, S shape dividing plate 5 concave and convex direction is consistent, and the trend of ripple is parallel with flue gas circulating direction.Ash bucket 3 is equipped with in the bottom of pretreatment unit, and ash bucket 3 connects without leak source with casing 2 is closely knit, and ash bucket 3 is tapered, is convenient to collect dust and discharge.
When the present embodiment median septum 5 arrangement mode makes pretreatment in flue gas dust and dividing plate collision frequency large, dust collection efficiency is high.
It should be noted that, dividing plate 5, except the arrangement mode described in embodiment 1 and embodiment 2, also can adopt other orderly or lack of alignment modes.
Embodiment 3
As shown in Figure 4, the present embodiment is equipment for denitrifying flue gas, comprises the flue gas pretreatment unit in embodiment 1 and boiler economizer 6, SCR reactor 7; Described flue gas pretreatment unit by Pipe installing between described boiler economizer 6 and SCR reactor 7.
It should be noted that, flue gas pretreatment unit, except adopting the device in above-described embodiment 1, also can adopt flue gas pretreatment unit in embodiment 2; In addition, flue gas pretreatment unit also can be connected the multistage pretreatment of multiple formation.
Above three embodiments of the present utility model have been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model application range change and improve, and all should still belong within patent covering scope of the present utility model.
Claims (8)
1. a flue gas pretreatment unit, is characterized in that: comprise the air inlet of casing and tank ends, gas outlet; Dividing plate is provided with in described casing; Described dividing plate vertical direction runs through whole described casing, and horizontal cross-section is S shape corrugated, and ripple trend is parallel to flue gas circulating direction; Ash bucket is provided with below described casing.
2. flue gas pretreatment unit according to claim 1, is characterized in that: parallel between described dividing plate, interval, setting straggly.
3. flue gas pretreatment unit according to claim 2, it is characterized in that: described dividing plate becomes multiple row to arrange in order, adjacent column space bar staggers mutually.
4. flue gas pretreatment unit according to claim 3, is characterized in that: often arranging the adjacent, parallel baffle interval distance of described diaphragm internal is 200 ~ 500mm.
5. flue gas pretreatment unit according to claim 3, is characterized in that: the described baffle interval distance of adjacent two row is 300 ~ 800mm.
6. flue gas pretreatment unit according to claim 1, is characterized in that: described ash bucket is inverted-cone shape.
7. an equipment for denitrifying flue gas, is characterized in that: comprise the flue gas pretreatment unit described in any one of claim 1-6 and boiler economizer, reactor; Described flue gas pretreatment unit by Pipe installing between described boiler economizer and reactor.
8. equipment for denitrifying flue gas according to claim 7, is characterized in that: the single setting of described flue gas pretreatment unit or multiple in multistage flue gas pretreatment unit along the series connection of flue gas circulating direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520643301.6U CN205007743U (en) | 2015-08-24 | 2015-08-24 | Flue flue gas preprocessing device and flue gas denitration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520643301.6U CN205007743U (en) | 2015-08-24 | 2015-08-24 | Flue flue gas preprocessing device and flue gas denitration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205007743U true CN205007743U (en) | 2016-02-03 |
Family
ID=55206373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520643301.6U Expired - Fee Related CN205007743U (en) | 2015-08-24 | 2015-08-24 | Flue flue gas preprocessing device and flue gas denitration device |
Country Status (1)
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|---|---|
| CN (1) | CN205007743U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051755A (en) * | 2016-07-25 | 2016-10-26 | 山东巨亚环保科技股份有限公司 | Flue gas purifying device and circulating fluidized bed boiler with device |
-
2015
- 2015-08-24 CN CN201520643301.6U patent/CN205007743U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051755A (en) * | 2016-07-25 | 2016-10-26 | 山东巨亚环保科技股份有限公司 | Flue gas purifying device and circulating fluidized bed boiler with device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 Termination date: 20190824 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |