CN205007853U - Improved generation SCR ozone denitrification facility - Google Patents
Improved generation SCR ozone denitrification facility Download PDFInfo
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- CN205007853U CN205007853U CN201520758021.XU CN201520758021U CN205007853U CN 205007853 U CN205007853 U CN 205007853U CN 201520758021 U CN201520758021 U CN 201520758021U CN 205007853 U CN205007853 U CN 205007853U
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- flue gas
- ozone
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Abstract
The utility model relates to an improved generation SCR ozone denitrification facility, including SCR reactor (4), flue gas blender (5) and ozone generator (6), the flue gas inlet department of SCR reactor (4) is equipped with air flow distribution board (1), air flow distribution board (1) is given vent to anger to hold and is equipped with distribution of air flow grid (2), distribution of air flow grid (2) below is equipped with SCR reaction catalyst carrier (3), distribution of air flow grid (2), all install in SCR reactor (4) SCR reaction catalyst carrier (3), be equipped with the flue gas inlet end on flue gas blender (5), exhanst gas outlet end and ozone entrance point, the exhanst gas outlet end of SCR reactor (4) passes through the flue gas inlet end of pipe connection flue gas blender (5), the ozone entrance point of flue gas blender (5) passes through pipe connection ozone generator (6), the utility model discloses denitration efficiency is high, and operating temperature is low, is favorable to realizing discharge to reach standard, satisfies the energy saving and emission reduction index of country.
Description
[technical field]
The utility model relates to nitrogen oxides treatment technical field, specifically a kind of modified SCR ozone denitrification apparatus.
[background technology]
At present, in denitrating flue gas field, what generally adopt is SCR technology or SNCR technology, and it plays positive effect in reduction of discharging nitrogen oxide and environmental protect.But according to current service condition, occurred some new problems: on the one hand, had higher operating cost and corrosivity, in-furnace temperature requires high, and control system is complicated; On the other hand, there is higher site requirements, and more steel construction; Thus, be unfavorable for realizing qualified discharge, the energy-saving and emission-reduction index of country cannot be met.
[utility model content]
The purpose of this utility model is exactly will solve above-mentioned deficiency and provide a kind of modified SCR ozone denitrification apparatus, not only denitration efficiency is high, and operating temperature is low, and has the advantage of reducing investment outlay and not being subject to place restriction, be conducive to realizing qualified discharge, meet the energy-saving and emission-reduction index of country.
Design a kind of modified SCR ozone denitrification apparatus for achieving the above object, comprise SCR reactor 4, flue gas blender 5 and ozone generator 6, the gas approach place of described SCR reactor 4 is provided with airflow-distribution board 1, the outlet side of described airflow-distribution board 1 is provided with airflow uniform distribution grid 2, SCR catalytic reaction agent carrier 3 is provided with below described airflow uniform distribution grid 2, described airflow uniform distribution grid 2, SCR catalytic reaction agent carrier 3 is installed in SCR reactor 4, described flue gas blender 5 is provided with gas approach end, smoke outlet and ozone entrance point, the smoke outlet of described SCR reactor 4 connects the gas approach end of flue gas blender 5 by pipeline, the ozone entrance point of described flue gas blender 5 connects ozone generator 6 by pipeline.
Described SCR catalytic reaction agent carrier 3 comprises catalyst support fine strain of millet 7 and SCR catalyst 8, and described catalyst support fine strain of millet 7 is arranged on SCR reactor 4 inwall, and described SCR catalyst 8 is placed on catalyst support fine strain of millet 7.
Described catalyst support fine strain of millet 7 is provided with three layers, and three layers of described catalyst support fine strain of millet 7 comprises two-layer use layer and one deck reserves layer.
Described airflow-distribution board 1 is arcuate structure, and the curved bend of described airflow-distribution board 1 is to the relative inwall of SCR reactor 4 gas approach.
The smoke outlet of described flue gas blender 5 connects desulfurizer.
Compared with the existing technology, tool has the following advantages the utility model:
(1) denitration efficiency is high, and single SCR technique denitration efficiency does not reach requirement, and SCR+ ozone process described in the utility model is greater than more than 90%;
(2) SCR operating temperature is low, and denitration efficiency is high, outlet ammonia escapement ratio <3ppm, SO2 oxygenation efficiency <1%;
(3) there is multiple arrangement: high temperature height dust-laden arrangement (after economizer, before air preheater), middle temperature low dust-laden mode (after deduster, before chimney), the low dust-laden arrangement of low temperature (after wet desulphurization, before chimney);
(4) ozone reactor occupation of land volume is little, and space adaptability is strong, also has simultaneously and reduces investment outlay and do not limit by place;
(5) safer urea and ozone can be used easily as denitrification reducing agent;
(6) be conducive to realizing qualified discharge, meet the energy-saving and emission-reduction index of country.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the close-up schematic view at I place in Fig. 1;
In figure: 1, airflow-distribution board 2, airflow uniform distribution grid 3, SCR catalytic reaction agent carrier 4, SCR reactor 5, flue gas blender 6, ozone generator 7, catalyst support fine strain of millet 8, SCR catalyst.
[detailed description of the invention]
Below in conjunction with accompanying drawing, following further illustrating is done to the utility model:
As shown in Figure 1, the utility model comprises: SCR reactor 4, flue gas blender 5 and ozone generator 6, the gas approach place of SCR reactor 4 is provided with airflow-distribution board 1, the outlet side of airflow-distribution board 1 is provided with airflow uniform distribution grid 2, SCR catalytic reaction agent carrier 3 is provided with below airflow uniform distribution grid 2, airflow uniform distribution grid 2, SCR catalytic reaction agent carrier 3 is installed in SCR reactor 4, flue gas blender 5 is provided with gas approach end, smoke outlet and ozone entrance point, the smoke outlet of SCR reactor 4 connects the gas approach end of flue gas blender 5 by pipeline, the ozone entrance point of flue gas blender 5 connects ozone generator 6 by pipeline, the smoke outlet of flue gas blender 5 connects desulfurizer.
Wherein, SCR catalytic reaction agent carrier 3 comprises catalyst support fine strain of millet 7 and SCR catalyst 8, and catalyst support fine strain of millet 7 is arranged on SCR reactor 4 inwall, and SCR catalyst 8 is placed on catalyst support fine strain of millet 7; This catalyst support fine strain of millet 7 can be provided with three layers, comprises two-layer use layer and one deck reserves layer.Airflow-distribution board 1 is arcuate structure, and the curved bend of airflow-distribution board 1 is to the relative inwall of SCR reactor 4 gas approach.
The utility model relates to nitrogen oxides treatment technology, comprises airflow-distribution board, airflow uniform distribution grid, SCR catalytic reaction agent carrier, SCR reactor, flue gas blender and ozone generator.This equipment for denitrifying flue gas does not reach at single SCR, ozone denitration efficiency, and one when single SCR denitration technological investment expense is larger optimizes out of stock device, reduces construction costs and operating cost, is a kind of equipment for denitrifying flue gas efficiently.
In the utility model, be arranged on the airflow-distribution board of gas approach, can avoid entering flue gas in SCR reactor and the right wall of SCR reactor collides, then cause flue gas to flow backwards towards airintake direction; Airflow uniform distribution grid, makes the flue gas from airflow-distribution board evenly enter SCR reactor; The use amount of SCR catalyst can be determined according to exhaust gas volumn, and the volume of SCR reactor is determined according to the consumption of SCR catalyst and arrangement, is generally 2+1 formula, that is, two-layer for using layer, one deck is reserved layer, and the temperature of SCR reactor controls at 320-420 DEG C; The ozone that ozone generator produces and flue gas hybrid reaction in flue gas blender that flue comes, in SCR reactor, reacted flue gas enters flue gas blender, and in flue gas, remaining NO and the ozone reaction be passed in flue gas blender generate NO
2, N
2o
3, N
2o
5, the NO of generation
2, N
2o
3, N
2o
5enter desulfurization section from flue gas blender, remove in desulfurization section.
The utility model proposes a kind of novel denitrating flue gas SCR+ ozone equipment, wherein SCR technology, the efficient denitration efficiency of ozone technology and suitable operating cost.
The principle of SCR technology is: under metallic catalyst effect optionally with NO
xreaction generates N
2and H
2o, SCR reactor temperature is between 320 DEG C-420 DEG C.
4NH
3+ 4NO+O
2→ 4N
2+ 6H
2o (taking ammonia as reducing agent)
2NO+CO (NH
2)
2+ 12O
2→ 2N
2+ CO
2+ 2H
2o (taking urea as reducing agent)
The principle of the out of stock technology of ozone is: ozone denitration technology uses O
3the NO being insoluble in water in flue gas is oxidized to the NO of high-valence state
2, then by the nox adsorption of alkaline solution by high-valence state, the nitrate of generation is again through concentration or discharge.
NO+O
3→NO
2+O
2
HNO
3+NaOH→NaNO
3+H
2O
As shown in Figure 2,7 is SCR catalyst, and 8 is catalyst support fine strain of millet, and flue gas is by the hole of SCR catalyst, and catalytic reduction in hole, the pressure loss of every layer of catalyst is 150Pa, finally generates nitrogen and water.
The utility model is not by the restriction of above-mentioned embodiment; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (5)
1. a modified SCR ozone denitrification apparatus, it is characterized in that: comprise SCR reactor (4), flue gas blender (5) and ozone generator (6), the gas approach place of described SCR reactor (4) is provided with airflow-distribution board (1), the outlet side of described airflow-distribution board (1) is provided with airflow uniform distribution grid (2), described airflow uniform distribution grid (2) below is provided with SCR catalytic reaction agent carrier (3), described airflow uniform distribution grid (2), SCR catalytic reaction agent carrier (3) is installed in SCR reactor (4), described flue gas blender (5) is provided with gas approach end, smoke outlet and ozone entrance point, the smoke outlet of described SCR reactor (4) connects the gas approach end of flue gas blender (5) by pipeline, the ozone entrance point of described flue gas blender (5) connects ozone generator (6) by pipeline.
2. modified SCR ozone denitrification apparatus as claimed in claim 1, it is characterized in that: described SCR catalytic reaction agent carrier (3) comprises catalyst support fine strain of millet (7) and SCR catalyst (8), described catalyst support fine strain of millet (7) is arranged on SCR reactor (4) inwall, and described SCR catalyst (8) is placed on catalyst support fine strain of millet (7).
3. modified SCR ozone denitrification apparatus as claimed in claim 2, is characterized in that: described catalyst support fine strain of millet (7) is provided with three layers, and three layers of described catalyst support fine strain of millet (7) comprises two-layer use layer and one deck reserves layer.
4. modified SCR ozone denitrification apparatus as claimed in claim 2 or claim 3, it is characterized in that: described airflow-distribution board (1) is arcuate structure, the curved bend of described airflow-distribution board (1) is to the relative inwall of SCR reactor (4) gas approach.
5. modified SCR ozone denitrification apparatus as claimed in claim 4, is characterized in that: the smoke outlet of described flue gas blender (5) connects desulfurizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520758021.XU CN205007853U (en) | 2015-09-28 | 2015-09-28 | Improved generation SCR ozone denitrification facility |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520758021.XU CN205007853U (en) | 2015-09-28 | 2015-09-28 | Improved generation SCR ozone denitrification facility |
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| Publication Number | Publication Date |
|---|---|
| CN205007853U true CN205007853U (en) | 2016-02-03 |
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| CN201520758021.XU Active CN205007853U (en) | 2015-09-28 | 2015-09-28 | Improved generation SCR ozone denitrification facility |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026082A (en) * | 2019-04-19 | 2019-07-19 | 大连理工大学 | A kind of ozone injects the kiln gas denitrification apparatus and method of auxiliary SCR before ammonia |
| CN110252138A (en) * | 2019-07-25 | 2019-09-20 | 河北威达蓝海环保科技有限公司 | A kind of device slowing down SCR Faveolate denitration catalyst deactivation rate |
-
2015
- 2015-09-28 CN CN201520758021.XU patent/CN205007853U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026082A (en) * | 2019-04-19 | 2019-07-19 | 大连理工大学 | A kind of ozone injects the kiln gas denitrification apparatus and method of auxiliary SCR before ammonia |
| CN110252138A (en) * | 2019-07-25 | 2019-09-20 | 河北威达蓝海环保科技有限公司 | A kind of device slowing down SCR Faveolate denitration catalyst deactivation rate |
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