CN206688507U - The device of sulfur trioxide in coal-fired flue-gas is removed using swirl injection device - Google Patents
The device of sulfur trioxide in coal-fired flue-gas is removed using swirl injection device Download PDFInfo
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- CN206688507U CN206688507U CN201720547721.3U CN201720547721U CN206688507U CN 206688507 U CN206688507 U CN 206688507U CN 201720547721 U CN201720547721 U CN 201720547721U CN 206688507 U CN206688507 U CN 206688507U
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- gas
- swirl
- swirl injection
- sulfur trioxide
- injection device
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Abstract
It the utility model is related to the device using sulfur trioxide in swirl injection device removing coal-fired flue-gas, including the swirl injection device that the vertical flue gas airintake direction in one end is penetrated in the denitration gas approach of Benitration reactor；The swirl injection device includes direct current injection pipe and rotates the swirl injection pipeline being set in outside direct current injection pipe；The end set that the swirl injection pipeline is located in denitration gas approach has the swirl vane of volume smoking gas；Recirculating gas duct is provided with outside the denitration gas approach；The recirculating gas duct inlet end and denitration gas approach UNICOM, the recirculating gas duct outlet side and swirl injection pipeline UNICOM；The direct current injection pipe sprays strong basicity particle into denitration gas approach, effectively removes sulfur trioxide in flue gas；It can prevent denitrating catalyst from inactivating and the life-span declines, air preheater blocks, effectively improve denitrating catalyst utilization rate, avoid air preheater from blocking.
Description
Technical field
The device using sulfur trioxide in swirl injection device removing coal-fired flue-gas is the utility model is related to, belongs to atmosphere pollution
Thing administers field.
Background technology
In order to reach minimum discharge standard, coal unit generally uses selective catalytic reduction (Selective
Catalytic denitrating flue gas) is carried out.Due to there is 0.5-1.5% SO in combustion process2SO can be converted into3, when flue-gas temperature is relatively low
When, SO3Can be with the NH in flue gas3And H2O reacts, and generates (NH4)2SO4And NH4HSO4, and on SCR denitration surface
And air preheater heat exchange plate surface deposition, the failure of catalyst and the blocking of air preheater are caused, can make to take off when serious
Nitre system is out of service, air preheater internal drag increases, power plant's energy consumption rise, influences the normal operation of unit.SO3In sky
, can be with H in flue gas when cigarette temperature drop is to less than 200 DEG C in air preheater2O generates H2SO4Aerosol and it is not easy by cleaner
Captured, will be discharged into flue gas in air with desulphurization plant, turn into one of principal element caused by haze.Existing denitrating flue gas skill
In art, SCR is widely used with its ripe technology, higher denitration efficiency in coal-burning power plant.With environmental protection standard
Raising, SCR denitration technology has become the mainstream technology of domestic coal fired power plant denitration.But there is catalyst in SCR denitration technology
The problems such as inactivation, air preheater block.It is contained in flue gas when the main reason for causing these problems is performing low-load running of machine set
Some SO3With the NH of penetrating3NH of the reaction generation with stickiness4HSO4, cause catalyst surface pore plugging, catalyst inactivation
And life-span degradation, cause air preheater to block after air inlet preheater.And the existing measure for preventing catalyst blockage
The transformation of economizer bypass flue and SCR economizers are mainly carried out, improves SCR inlet cigarette temperature, improvement cost is of a relatively high.
Utility model content
In order to solve the above-mentioned technical problem, the utility model is provided using three oxidations in swirl injection device removing coal-fired flue-gas
The device of sulphur.This using swirl injection device removing coal-fired flue-gas in sulfur trioxide device can prevent denitrating catalyst inactivate and
Life-span declines, air preheater blocks, and effectively improves denitrating catalyst utilization rate, avoids air preheater from blocking, it is ensured that coal-fired
Unit safety operation.
The technical solution of the utility model is as follows：
The device of sulfur trioxide in coal-fired flue-gas is removed using swirl injection device, including the vertical flue gas airintake direction in one end is worn
Enter the swirl injection device in the denitration gas approach of Benitration reactor；The swirl injection device includes direct current injection pipe and rotation
The swirl injection pipeline being set in outside direct current injection pipe；The end that the swirl injection pipeline is located in denitration gas approach is set
It is equipped with the swirl vane of volume smoking gas；Recirculating gas duct is provided with outside the denitration gas approach；The recirculating gas duct air inlet
End connects with denitration gas approach, the recirculating gas duct outlet side and swirl injection pipeline communication；The direct current injection pipe
Strong basicity particle is sprayed into denitration gas approach.
Wherein, the device that sulfur trioxide in coal-fired flue-gas is removed using swirl injection device also includes crushing strong basicity thing
Matter is into granular Impeller powder feeder；The Impeller powder feeder include crushing housing, be arranged on crush housing upper end charging aperture,
It is arranged on the discharging opening for crushing housing lower end and is arranged on the reducing mechanism crushed in housing；The discharging opening passes through a gas transmission
Pipe and direct current injection pipe UNICOM, can control the powder-feeding amount of Impeller powder feeder by adjusting drive device.
Wherein, the swirl injection utensil has multiple, is evenly arranged along denitration gas approach；The swirl injection pipeline production
Raw swirling eddy rotation direction and flow of flue gas is in opposite direction.
Wherein, the strong basicity particle is calcium-base absorbing agent, and the particle diameter of the strong basicity particle is 10-150 μm, particle diameter point
Cloth coefficient is 1.5-3.
Wherein, the strong basicity calcium-base absorbing agent particle is calcium hydroxide or calcium oxide or uses alkali compounds modified
Calcium-base absorbing agent；Multi-layer catalyst layer is provided with the Benitration reactor.
Wherein, the Benitration reactor also bypasses the blender of an ammonia and air.
Wherein, the Benitration reactor interior edge inwall above multi-layer catalyst layer is provided with collecting tank；More equal along collecting tank
Drain rod one end of even distribution is stretched into collecting tank, and the other end is tilted upward and is hinged.
Wherein, a fine grinding device is arranged with the discharging opening；The fine grinding device includes the circle of the upward rotation in summit
Mill body and the outer mill body being set in outside middle mill body bottom in taper；Middle flour milling is provided with the middle part of the middle mill body outer conical surface；Institute
State outer mill body inner ring and be provided with outer flour milling with middle flour milling gap setting；The middle flour milling forms grinding space with outer flour milling；Institute
State middle mill body top and the feed well to form that vertical section is W fonts is enclosed with outer mill body top.
Wherein, the outer mill body bottom encloses to form blow tank with middle mill body bottom；The outer mill body is located in blow tank
Inwall be smooth interior convex globoidal；Offered in the outer mill body in blow tank and the annular air of air-out downwards is thin
Seam；There is the rounding off of protrusion between the air-out fine crack and inwall.
The utility model has the advantages that：
1st, the utility model can prevent denitration catalyst using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas
Agent inactivates and the life-span declines, air preheater blocks, and effectively improves denitrating catalyst utilization rate, avoids Blocking in Air Preheater
Plug, it is ensured that coal unit safe operation.
2nd, when the utility model can avoid the Benitration reactor from underload occur, the inactivation and air preheater of denitrating catalyst
Blocking the problems such as, ensure the denitration efficiency of SCR denitration device, it is ensured that the normal operation of unit.
3rd, the utility model is lost by being lowered into the concentration of sulfur trioxide before denitrating catalyst to reduce catalyst
The possibility that living and air preheater blocks, not only invests small, and is easily achieved.
4th, the utility model is provided with fine grinding device, can effectively improve the particle diameter precision of strong basicity particle, improves strong
The utilization rate of alkali grain.
5th, fine grinding device of the present utility model is provided with air-out fine crack, first, utilizing Coanda effect, is located at outer mill body
Inwall in blow tank pastes wind film, prevents strong basicity particle to be adhered to blow tank internal congestion blow tank, reduces the essence of load
Degree；Second, strong basicity particle is set preferably to discharge using blast change, into appendix；Third, it can enter in strong basicity particle
Uniform distribution is just formed before appendix, it is possible to increase the accuracy that strong basicity particle finally reacts with sulfur trioxide.
6th, the utility model is arranged with swirl injection pipeline outside direct current injection pipe, and is provided with swirl vane, can
Smoking gas is rolled up, enables the contact of flue gas with the strong basicity particle longer time and evenly, effectively improves the profit of strong basicity particle
With the removal efficiency of sulfur trioxide in rate and flue gas.
7th, swirling eddy rotation direction and flow of flue gas are in opposite direction caused by swirl injection pipeline of the present utility model, can drop
The laminar flow effect of low flue gas, increase the turbulent flow effect of flue gas, improve effective contact area and the time of flue gas and strong basicity particle.
8th, the utility model is provided with collecting tank and drain rod, can effectively reduce in flue gas contained sulfur trioxide with
The NH of penetrating3React the NH of generation4HSO4Amount, so as to reduce catalyst surface pore plugging, the catalyst inactivation and life-span is serious
Decline, the possibility that air preheater blocks.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the front schematic view of the utility model swirl injection device；
Fig. 3 is the side view of the utility model swirl injection device；
Fig. 4 is arrangement schematic diagram of the utility model swirl injection device in the side wall of denitration gas approach one；
Fig. 5 is the structural representation of the utility model fine grinding device；
Fig. 6 is the enlarged diagram of air-out fine crack in the utility model Fig. 5；
Fig. 7 is the schematic top plan view of the utility model drain rod and collecting tank.
Reference is expressed as in figure：
1- Impeller powder feeders, 11- charging apertures, 12- discharging openings, 13- crush housing, 14- drive devices, 15- fine grinding devices,
Flour milling, the outer flour millings of 154-, 155- feed wells, 156- blow tanks, 157- air-out are thin in mill body, 152- outer mill body, 153- in 151-
Seam, 158- inwalls, 2- appendixs, 3- recirculating gas ducts, 4- denitrations gas approach, 5- swirl injections device, 51- direct current playpipes
Road, 52- swirl injections pipeline, 521- swirl vanes, 6- Benitration reactors, 61- catalyst layers, 62- collecting tanks, 63- drains rod,
7- blenders.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 4, it is vertical using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, including one end
The swirl injection device 5 that flue gas airintake direction is penetrated in the denitration gas approach 4 of Benitration reactor 6；The swirl injection device 5 includes
Direct current injection pipe 51 and rotation are set in the swirl injection pipeline 52 outside direct current injection pipe 51；The swirl injection pipeline 52
End set in denitration gas approach 4 has the swirl vane 521 of volume smoking gas；Set outside the denitration gas approach 4
There is recirculating gas duct 3；The inlet end of recirculating gas duct 3 and the UNICOM of denitration gas approach 4, the outlet side of recirculating gas duct 3
With the UNICOM of swirl injection pipeline 52；The direct current injection pipe 51 sprays strong basicity particle into denitration gas approach 4；Eddy flow sprays
Smoking gas can be rolled up by penetrating pipeline 52, enable the contact of flue gas with the strong basicity particle longer time and evenly, effectively improved strong
The removal efficiency of sulfur trioxide in the utilization rate and flue gas of alkali grain.
Further, the device that sulfur trioxide in coal-fired flue-gas is removed using swirl injection device also includes crushing highly basic
Property material is into granular Impeller powder feeder 1；The Impeller powder feeder 1 includes crushing housing 13, is arranged on crushing housing 13
The charging aperture 11 at end, it is arranged on the discharging opening 12 for crushing the lower end of housing 13 and is arranged on the reducing mechanism crushed in housing 13；
The discharging opening 12 can control impeller to give by an appendix 2 and the UNICOM of direct current injection pipe 51 by adjusting drive device 14
The powder-feeding amount of powder machine 1.
Further, referring to Fig. 1, the swirl injection device 5 has multiple, is evenly arranged along denitration gas approach 4；Referring to
Fig. 4, one group of swirl injection device 5 two on 4 unilateral inwall of denitration gas approach, the direction of rotation phase of its swirl injection pipeline 52
Instead and with smoke movement direction A also on the contrary, making swirling eddy rotation direction caused by the swirl injection pipeline 52 and flow of flue gas side
To A on the contrary, the laminar flow effect of flue gas can be reduced, increase the turbulent flow effect of flue gas, raising flue gas is effective with strong basicity particle
Contact area and time.
Preferably, the strong basicity particle is calcium-base absorbing agent, and the particle diameter of the strong basicity particle is 10-150 μm, particle diameter
Breadth coefficient is 1.5-3.
Preferably, the strong basicity calcium-base absorbing agent particle is calcium hydroxide Ca (OH)2Or calcium oxide CaO or use alkalescence
Calcium-base absorbing agent after compound modified；Pass through solid Ca (OH)2Or CaO or the calcium-base absorbing agent particle of modification and SO in flue gas3
Generation gas-solid reaction, by the SO in flue gas3Removing.
Further, the Benitration reactor 6, which also bypasses, a blender 7；The blender 7 each leads into ammonia and sky
Gas, ammonia and air are passed through in blender 7 and carry out mixed diluting.
Further, as shown in Fig. 1,7, multi-layer catalyst layer 61 is provided with the Benitration reactor 6；Multi-layer catalyst
The interior edge inwall of Benitration reactor 6 of the top of layer 61 is provided with collecting tank 62；More along the equally distributed drain rod 63 of collecting tank 62
One end is stretched into collecting tank 62, and the other end is tilted upward and is hinged；Contained three oxidation in flue gas can effectively be reduced
Sulphur and the NH sprayed into3React the NH of generation4HSO4Amount, so as to reduce catalyst surface pore plugging, catalyst inactivation and life-span
Degradation, the possibility that air preheater blocks.
Further, as shown in Fig. 1,5,6, a fine grinding device 15 is arranged with the discharging opening 12；The fine grinding device
15 include mill body 151 and the outer mill body 152 being set in outside the middle bottom of mill body 151 in the upward rotatable cone in summit；Institute
State and be provided with middle flour milling 153 in the middle part of the middle outer conical surface of mill body 151；The inner ring of outer mill body 152 is provided with and the middle gap of flour milling 153
The outer flour milling 154 set；The middle flour milling 153 forms grinding space with outer flour milling 154；The top of middle mill body 151 and outer mill
The top of body 152 encloses the feed well 155 to form that vertical section is W fonts, can effectively improve the particle diameter essence of strong basicity particle
Degree, improve the utilization rate of strong basicity particle.
Further, the bottom of outer mill body 152 encloses to form blow tank 156 with the middle bottom of mill body 151；The outer mill body
152 inwall 158 in blow tank 156 is smooth interior convex globoidal；Oriented blow tank 156 is opened up in the outer mill body 152
The annular air fine crack 157 of interior air-out；The air-out fine crack 157 is close to the downward air-out of the outer inwall of mill body 152, the air-out fine crack
There is the rounding off of protrusion between 157 and inwall 158, make by the wind that air-out fine crack 157 flows out along the surface flow of inwall 158；
First, utilizing Coanda effect, the inwall that outer mill body 152 is located in blow tank 156 is pasted wind film, prevent strong basicity particle from gluing
The internal congestion blow tank 156 of blow tank 156 is attached to, reduces the precision of load；Second, make strong basicity particle using blast change
Preferably discharging, into appendix 2；Third, uniform distribution can be just formed before strong basicity particle enters appendix 2, can
Improve accuracy of the strong basicity particle finally with sulfur trioxide reaction.
Enter the feed well 155 of fine grinding device 15 in discharging opening 12 by the strong basicity particle that Impeller powder feeder 1 crushes,
And fallen after outer flour milling 154 and middle flour milling 153 are ground from blow tank 156, by the air-out of air-out fine crack 157 during falling
The wind film even action for pasting the inwall formation that outer mill body 152 is located at blow tank 156 is disperseed and brought into appendix 2.
The de- sulfur trioxide method of the device of sulfur trioxide in coal-fired flue-gas, including following step are removed using swirl injection device
Suddenly：
1. from charging aperture 11 by calcium hydroxide or calcium oxide or using the modified composition of alkali compounds strong basicity calcium base
Absorbent, which is sent into Impeller powder feeder 1, is ground into strong basicity particle, and the particle diameter of strong basicity particle is 10-150 μm, particle diameter distribution system
Number is 1.5-3；
2. strong basicity particle enters appendix 2, and carries from direct current injection pipe 51 to enter to denitration from the air of appendix 2
Spray in mouth flue 4 and reacted with the sulfur trioxide in flue gas, the reaction equivalent ratio of strong basicity particle and sulfur trioxide is 1：（1.5-
5）, the residence time in flue gas is 0.2-2.5s；
3. 2. synchronously being carried out with step, swirl injection pipeline 52 rotates, and passes through swirl vane suction denitration gas approach of volume 521
Flue gas in 4, wherein, partial fume returns to denitration entrance after entering swirl injection pipeline 52 and entrance by recirculating gas duct 3
In flue 4；
4. the flue gas after 2. 3. step removes sulfur trioxide with step and the mixture of NH3 and air from blender 7
Ammonia and air after mixing into Benitration reactor 6 are reacted；
5. flue gas carries out catalytic reduction reaction denitration with the catalyst layer 61 in Benitration reactor 6.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical areas, similarly it is included in scope of patent protection of the present utility model.
Claims (9)
1. using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, it is characterised in that：Including the vertical flue gas in one end
Airintake direction penetrates Benitration reactor（6）Denitration gas approach（4）Interior swirl injection device（5）；The swirl injection device（5）
Including direct current injection pipe（51）Direct current injection pipe is set in rotation（51）Outer swirl injection pipeline（52）；The eddy flow
Injection pipe（52）Positioned at denitration gas approach（4）Interior end set has the swirl vane of volume smoking gas（521）；The denitration
Gas approach（4）It is provided with recirculating gas duct outside（3）；The recirculating gas duct（3）Inlet end and denitration gas approach（4）Even
It is logical, the recirculating gas duct（3）Outlet side and swirl injection pipeline（52）Connection；The direct current injection pipe（51）Enter to denitration
Mouth flue（4）Interior injection strong basicity particle.
2. as claimed in claim 1 using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, it is characterised in that：
Also include crushing strong alkaline substance into granular Impeller powder feeder（1）；The Impeller powder feeder（1）Including crushing housing
（13）, be arranged on crushing housing（13）The charging aperture of upper end（11）, be arranged on crushing housing（13）The discharging opening of lower end（12）With
And it is arranged on crushing housing（13）Interior reducing mechanism；The discharging opening（12）Pass through an appendix（2）With direct current injection pipe
（51）UNICOM, can be by adjusting drive device（14）, control Impeller powder feeder（1）Powder-feeding amount.
3. as claimed in claim 2 using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, it is characterised in that：
The swirl injection device（5）With multiple, along denitration gas approach（4）It is evenly arranged；The swirl injection pipeline（52）Produce
Swirling eddy rotation direction and flow of flue gas it is in opposite direction.
4. as claimed in claim 3 using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, it is characterised in that：
The strong basicity particle is calcium-base absorbing agent, and the particle diameter of the strong basicity particle is 10-150 μm, and particle diameter distribution coefficient is 1.5-
3。
5. as claimed in claim 4 using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, it is characterised in that：
The strong basicity calcium-base absorbing agent particle is calcium hydroxide or calcium oxide or uses the modified calcium-base absorbing agent of alkali compounds；
The Benitration reactor（6）Inside it is provided with multi-layer catalyst layer（61）.
6. as claimed in claim 5 using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, it is characterised in that：
The Benitration reactor（6）Also bypass has the blender of an ammonia and air（7）.
7. being removed using swirl injection device in coal-fired flue-gas sulfur trioxide as described in claim 1 to 6 any claim
Device, it is characterised in that：Multi-layer catalyst layer（61）The Benitration reactor of top（6）Interior edge inwall is provided with collecting tank（62）；
More along collecting tank（62）Equally distributed drain rod（63）Collecting tank is stretched into one end（62）Interior, the other end tilts upward simultaneously mutually
It is be hinged.
8. being removed using swirl injection device in coal-fired flue-gas sulfur trioxide as described in claim 2 to 6 any claim
Device, it is characterised in that：The discharging opening（12）Inside it is arranged with a fine grinding device（15）；The fine grinding device（15）Including summit
Mill body in the cone of upward rotation（151）Be set in middle mill body（151）Outer mill body outside bottom（152）；The middle mill
Body（151）Middle flour milling is provided with the middle part of outer conical surface（153）；The outer mill body（152）Inner ring is provided with and middle flour milling（153）Between
The outer flour milling that gap is set（154）；The middle flour milling（153）With outer flour milling（154）Form grinding space；The middle mill body（151）
Top and outer mill body（152）Top encloses the feed well to form that vertical section is W fonts（155）.
9. as claimed in claim 8 using the device of sulfur trioxide in swirl injection device removing coal-fired flue-gas, it is characterised in that：
The outer mill body（152）Bottom and middle mill body（151）Bottom encloses to form blow tank（156）；The outer mill body（152）It is located at
Hopper（156）Interior inwall（158）For smooth interior convex globoidal；The outer mill body（152）On offer positioned at blow tank（156）
The annular air fine crack of interior and downward air-out（157）；The air-out fine crack（157）With inwall（158）Between have protrusion circle
Slip over and cross.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720547721.3U CN206688507U (en) | 2017-05-17 | 2017-05-17 | The device of sulfur trioxide in coal-fired flue-gas is removed using swirl injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720547721.3U CN206688507U (en) | 2017-05-17 | 2017-05-17 | The device of sulfur trioxide in coal-fired flue-gas is removed using swirl injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206688507U true CN206688507U (en) | 2017-12-01 |
Family
ID=60449144
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720547721.3U Withdrawn - After Issue CN206688507U (en) | 2017-05-17 | 2017-05-17 | The device of sulfur trioxide in coal-fired flue-gas is removed using swirl injection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN206688507U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106925109A (en) * | 2017-05-17 | 2017-07-07 | 山西大学 | Using the device and method of sulfur trioxide in swirl injection device removing coal-fired flue-gas |
| CN111659238A (en) * | 2020-06-16 | 2020-09-15 | 王波 | Energy-saving environment-friendly flue gas purification and desulfurization device and method thereof |
| CN107875847B (en) * | 2017-12-13 | 2023-12-29 | 山西大学 | Ammonia nitrogen mixing device for thermal power boiler ammonia spraying system |
-
2017
- 2017-05-17 CN CN201720547721.3U patent/CN206688507U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106925109A (en) * | 2017-05-17 | 2017-07-07 | 山西大学 | Using the device and method of sulfur trioxide in swirl injection device removing coal-fired flue-gas |
| CN107875847B (en) * | 2017-12-13 | 2023-12-29 | 山西大学 | Ammonia nitrogen mixing device for thermal power boiler ammonia spraying system |
| CN111659238A (en) * | 2020-06-16 | 2020-09-15 | 王波 | Energy-saving environment-friendly flue gas purification and desulfurization device and method thereof |
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