CN204638000U - A kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas - Google Patents
A kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas Download PDFInfo
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- CN204638000U CN204638000U CN201520244943.9U CN201520244943U CN204638000U CN 204638000 U CN204638000 U CN 204638000U CN 201520244943 U CN201520244943 U CN 201520244943U CN 204638000 U CN204638000 U CN 204638000U
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Abstract
Be applied to a reducing agent mixing arrangement for SCR denitrating flue gas, this mixing arrangement is arranged in the vertical well gas flue before SCR reactor, and reducing agent mixing arrangement comprises flue, flue gas stream, reducing agent jet pipe, subordinate's reducing agent bridge insert and higher level's reducing agent bridge insert.Reducing agent jet pipe, subordinate's reducing agent bridge insert, the complete setting of higher level's reducing agent bridge insert, the reducing agent jet pipe through flue sidewall is arranged on subordinate's reducing agent bridge insert lee side.Higher level's reducing agent bridge insert is positioned at the flue gas downstream position of subordinate's reducing agent bridge insert.The utility model, flue gas is utilized to flow through grade turbulent flow that subordinate's reducing agent bridge insert is formed, realize reducing agent to mix with the preliminary of flue gas, utilize the turbulent flow that cigarette airflow downstream polylith higher level reducing agent bridge insert produces, realize repeatedly Forced Mixing, reach reducing agent and the effect fully mixed of flue gas, improve denitration effect.
Description
Technical field
The utility model relates to SCR denitration field, thermal power plant.
Background technology
The discharge control method mainstream technology of the nitrogen oxide of thermoelectricity generating set is selective catalytic reduction reaction (SCR), its principle is in the temperature range of 300-400 DEG C, reducing agent (ammonia) is injected in flue and fully mixes with flue gas, carry out the Benitration reactor in downstream, under the catalytic action of catalyst, remove the nitrogen oxide (NOX) in flue gas, generate nitrogen and water.
Owing to comparing exhaust gas volumn, the emitted dose of reducing agent is less, and simultaneously the cross section of flue is comparatively large, is therefore difficult to realize flue gas and reducing agent fully mixes, and causes the entrance flow field uniformity of Benitration reactor and catalyst poor, affects denitration effect.Especially for the Practical Project that denitration efficiency is high, the mixed effect of reducing agent and flue gas directly affects the removal effect of nitrogen oxide.
Existing reducing agent mixing arrangement adopts grid equal distribution device usually, because its spout bore is less, under the condition that flue gas flying dust concentration is higher, very easily blocks, putting into operation of influential system; Ammonia-spraying grid is under boiler varying duty condition simultaneously, poor to the adaptability of flue gas incoming flow, is therefore difficult to the requirement meeting SCR denitration system operation.
Summary of the invention
For the shortcoming of reducing agent mixing arrangement in existing SCR denitration system, the utility model provides a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas, solve reducing agent and flue gas undercompounding, the problem of denitration effect difference, reducing agent is being sprayed into after in flue, fully mixing of reducing agent and flue gas can be realized, improve the adaptability of mixing arrangement for boiler varying duty simultaneously.
Technical solutions of the utility model are as follows:
A kind of reducing agent mixing arrangement of denitrating flue gas:
Comprise flue and the reducing agent jet pipe through flue sidewall, flue gas stream is had to flow in flue from bottom to top, and discharge from outlet flue, the spout of reducing agent jet pipe has reducing agent to spray, end the coming to bending to flue gas stream of described reducing agent jet pipe, there is an angle β the described extended line of injection of reducing agent tube end axis and the axis of flue, the spout front of described reducing agent jet pipe and flue gas stream are head-on provided with one piece of subordinate's reducing agent bridge insert, above described reducing agent jet pipe and described subordinate reducing agent bridge insert, namely the downstream direction of flue gas stream is provided with at least one piece of higher level's reducing agent bridge insert, described subordinate reducing agent bridge insert and higher level's reducing agent bridge insert are connected to the welding gasket of walling of flue by the supporting steel pipe through center, upper described flue gas stream forms mixing turbulent flow near subordinate's reducing agent bridge insert and higher level's reducing agent bridge insert.
The angle β of the described extended line of injection of reducing agent tube end axis and the axis of flue is 15 ~ 65 degree.
Described subordinate reducing agent bridge insert is inclined relative to horizontal and puts, and the angle α of its plate face and injection of reducing agent tube end axis extended line is 45 ~ 135 degree.
Described higher level's reducing agent bridge insert is inclined relative to horizontal and puts, and its incline direction is contrary with subordinate reducing agent bridge insert, and the plate face of higher level's reducing agent bridge insert and the angle of flue axis are greater than 0 degree and are less than 180 degree.
Described higher level's reducing agent bridge insert is one group, and quantity is at least 2 pieces, is spaced to downstream direction odd even by upstream, and reducing agent jet pipe, one piece of subordinate's reducing agent bridge insert and one group of higher level's reducing agent bridge insert are a set of, are at least provided with a set of in flue.
The odd number plate of described higher level's reducing agent bridge insert is contrary with even plates incline direction.
The odd number plate of described higher level's reducing agent bridge insert and even plates small one and large one be spaced.
Described subordinate reducing agent bridge insert and higher level's reducing agent bridge insert can be circular slab, elliptical flat-plate or rectangular slab.
The utility model has the advantage of utilize higher level's reducing agent bridge insert and polylith subordinate reducing agent bridge insert flue gas by time the turbulent flow that produces, achieve fully mixing of flue gas and reducing agent, and ensure that the uniformity in flow field, downstream; Due to invariant position when turbulent flow changes with flue gas incoming flow, therefore during unit varying load condition, mixed effect can not change, and adaptive ability is strong, therefore can realize automatic adjustment during unit varying duty; Reducing agent jet pipe can be arranged on a small quantity, and injection of reducing agent mouth of pipe footpath is large, not easily blocks, reduces the workload of inspection and maintenance.
Accompanying drawing explanation
Fig. 1 is the utility model longitudinal cross-section schematic diagram.
Fig. 2 is the utility model close-up schematic view.
Fig. 3 is the utility model embodiment 1 schematic diagram.
Fig. 4 is the utility model embodiment 2 schematic diagram.
Reference numeral: 1-flue, 2-flue gas stream, 3-reducing agent jet pipe, 4-reducing agent, 5-subordinate reducing agent bridge insert, 6-mix turbulent flow, the upper 1 grade of reducing agent mixed plate of 7-higher level's reducing agent bridge insert, 71-, the upper 2 grades of reducing agent mixed plates of 72-, the upper 3 grades of reducing agent mixed plates of 73-, 8-outlet flue, 9-supporting steel pipe, 10-welding gasket.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
Embodiment 1 is as Fig. 2, shown in Fig. 3, a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas, comprise flue 1 and the reducing agent jet pipe 3 through flue sidewall, flue gas stream 2 is had to flow in flue 1 from bottom to top, and discharge from outlet flue 8, the spout of reducing agent jet pipe 3 has reducing agent 4 to spray, end the coming to bending to flue gas stream 2 of described reducing agent jet pipe 3, the extended line of axis, described reducing agent jet pipe 3 end and the axis of flue have an angle β to be 15 degree, the spout front of described reducing agent jet pipe 3 and flue gas stream 2 are head-on provided with one piece of subordinate's reducing agent bridge insert 5, above described reducing agent jet pipe 3 and described subordinate reducing agent bridge insert 5, namely the downstream direction of flue gas stream arranges 1 grade of reducing agent bridge insert 71 and upper 2 grades of reducing agent bridge inserts 72, described subordinate reducing agent bridge insert 5, upper 1 grade of reducing agent bridge insert 71, upper 2 grades of reducing agent bridge inserts 72 are connected on walling of flue welding gasket 10 by the supporting steel pipe 9 through center, described flue gas stream 2 is at subordinate's reducing agent bridge insert 5, upper 1 grade of reducing agent bridge insert 71, the lee side adjacent edges of upper 2 grades of reducing agent bridge inserts 72 forms mixing turbulent flow 6.Described subordinate reducing agent bridge insert 5 is inclined relative to horizontal and puts, and the angle α of its plate face and axis, reducing agent jet pipe 3 end extended line is 45 degree.The described plate face of upper 1 grade of reducing agent bridge insert 71 and the angle of flue axis are 135 degree, and the described plate face of upper 2 grades of reducing agent bridge inserts 72 and the angle of flue axis are 45 degree.Described subordinate reducing agent bridge insert 3, upper 1 grade of reducing agent bridge insert 71, upper 2 grades of reducing agent bridge inserts 72 are circular slab.
Embodiment 2 is as Fig. 2, shown in Fig. 4, a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas, comprise flue 1 and the reducing agent jet pipe 3 through flue sidewall, flue gas stream 2 is had to flow in flue 1 from bottom to top, and discharge from outlet flue 8, the spout of reducing agent jet pipe 3 has reducing agent 4 to spray, end the coming to bending to flue gas stream 2 of described reducing agent jet pipe 3, the extended line of axis, described reducing agent jet pipe 3 end and the axis of flue have an angle β to be 65 degree, the spout front of described reducing agent jet pipe 3 and flue gas stream 2 are head-on provided with one piece of subordinate's reducing agent bridge insert 5, above described reducing agent jet pipe 3 and described subordinate reducing agent bridge insert 5, namely the downstream direction of flue gas stream arranges 1 grade of reducing agent bridge insert 71, upper 2 grades of reducing agent bridge inserts 72, upper 3 grades of reducing agent bridge inserts 73, described subordinate reducing agent bridge insert 5, upper 1 grade of reducing agent bridge insert 71, upper 2 grades of reducing agent bridge inserts 72, upper 3 grades of reducing agent bridge inserts 73 are connected on walling of flue welding gasket 10 by the supporting steel pipe 9 through center, described flue gas stream 2 is at subordinate's reducing agent bridge insert 5, upper 1 grade of reducing agent bridge insert 71, upper 2 grades of reducing agent bridge inserts 72, the lee side adjacent edges of upper 3 grades of reducing agent bridge inserts 73 forms mixing turbulent flow 6.Described subordinate reducing agent bridge insert 5 is inclined relative to horizontal and puts, and the angle α of its plate face and axis, reducing agent jet pipe 3 end extended line is 135 degree.The described plate face of upper 1 grade of reducing agent bridge insert 71 and the angle of flue axis are 135 degree, the described plate face of upper 2 grades of reducing agent bridge inserts 72 and the angle of flue axis are 45 degree, and the described plate face of upper 3 grades of reducing agent bridge inserts 73 and the angle of flue axis are 45 degree.Described subordinate reducing agent bridge insert 5, upper 1 grade of reducing agent bridge insert 71, upper 2 grades of reducing agent bridge inserts 72, upper 3 grades of reducing agent bridge inserts 73 are elliptical flat-plate.Flue gas stream 2 downstream direction is provided with reducing agent jet pipe 3, subordinate reducing agent bridge insert 5, upper 1 grade reducing agent bridge insert 71, upper 2 grade reducing agent bridge inserts 72, the upper 3 grade reducing agent bridge inserts 73 of the second cover with above-mentioned identical configuration.
Claims (8)
1. one kind is applied to the reducing agent mixing arrangement of SCR denitrating flue gas, comprise flue (1) and the reducing agent jet pipe (3) through flue sidewall, flue gas stream (2) is had to flow in flue (1) from bottom to top, and discharge from outlet flue (8), the spout of reducing agent jet pipe (3) has reducing agent (4) to spray, it is characterized in that: end the coming to bending to flue gas stream (2) of described reducing agent jet pipe (3), there is an angle β the described extended line of reducing agent jet pipe (3) axis, end and the axis of flue, the spout front of described reducing agent jet pipe (3) and flue gas stream (2) are head-on provided with one piece of subordinate's reducing agent bridge insert (5), in the top of described reducing agent jet pipe (3) and described subordinate's reducing agent bridge insert (5), namely the downstream direction of flue gas stream is provided with at least one piece of higher level's reducing agent bridge insert (7), described subordinate's reducing agent bridge insert (5) is connected on the welding gasket (10) of walling of flue with higher level's reducing agent bridge insert (7) by the supporting steel pipe (9) through center, described flue gas stream (2) forms mixing turbulent flow (6) in the vicinity of subordinate's reducing agent bridge insert (5) and higher level's reducing agent bridge insert (7).
2. a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas according to claim 1, is characterized in that: the angle β of the described extended line of reducing agent jet pipe (3) axis, end and the axis of flue is 15 ~ 65 degree.
3. a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas according to claim 1, it is characterized in that: described subordinate's reducing agent bridge insert (5) is inclined relative to horizontal and puts, the angle α of its plate face and reducing agent jet pipe (3) axis, end extended line is 45 ~ 135 degree.
4. a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas according to claim 1, it is characterized in that: described higher level's reducing agent bridge insert (7) is inclined relative to horizontal and puts, its incline direction is contrary with subordinate's reducing agent bridge insert (3), and the plate face of higher level's reducing agent bridge insert (7) and the angle of flue axis are greater than 0 degree and are less than 180 degree.
5. a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas according to Claims 1 to 4 any one, it is characterized in that: described higher level's reducing agent bridge insert (7) is one group, quantity is at least 2 pieces, be spaced to downstream direction odd even by upstream, reducing agent jet pipe (2), one piece of subordinate's reducing agent bridge insert (3) and one group of higher level's reducing agent bridge insert (7), for a set of, are at least provided with a set of in flue.
6. a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas according to claim 5 any one, is characterized in that: the odd number plate of described higher level's reducing agent bridge insert (7) is contrary with even plates incline direction.
7. a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas according to claim 5 any one, is characterized in that: the odd number plate of described higher level's reducing agent bridge insert (7) and even plates small one and large one be spaced.
8. a kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas according to claim 1 or 6 or 7, is characterized in that: described subordinate's reducing agent bridge insert (3) and higher level's reducing agent bridge insert (7) are circular slab, elliptical flat-plate or rectangular slab.
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| CN201520244943.9U CN204638000U (en) | 2015-04-21 | 2015-04-21 | A kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas |
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| CN201520244943.9U CN204638000U (en) | 2015-04-21 | 2015-04-21 | A kind of reducing agent mixing arrangement being applied to SCR denitrating flue gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215656A (en) * | 2016-09-09 | 2016-12-14 | 成都九十度工业产品设计有限公司 | A kind of ozone mixing reactor |
| CN108704456A (en) * | 2018-07-17 | 2018-10-26 | 中国恩菲工程技术有限公司 | Pipe-line mixer and refuse burning system suitable for denitrating flue gas |
| CN109173694A (en) * | 2018-09-28 | 2019-01-11 | 河南安彩高科股份有限公司 | A kind of desulphurization reaction pipe, desulfurization dust-removal system and its technique based on desulphurization reaction pipe |
| CN113694762A (en) * | 2021-08-24 | 2021-11-26 | 西安热工研究院有限公司 | Self-adaptive adjustment dynamic ammonia injection mixer |
| CN114113498A (en) * | 2022-01-25 | 2022-03-01 | 光大环保技术装备（常州）有限公司 | Fluid flow velocity reverse disturbance purification test system and method for SCR denitration system |
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2015
- 2015-04-21 CN CN201520244943.9U patent/CN204638000U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215656A (en) * | 2016-09-09 | 2016-12-14 | 成都九十度工业产品设计有限公司 | A kind of ozone mixing reactor |
| CN108704456A (en) * | 2018-07-17 | 2018-10-26 | 中国恩菲工程技术有限公司 | Pipe-line mixer and refuse burning system suitable for denitrating flue gas |
| CN109173694A (en) * | 2018-09-28 | 2019-01-11 | 河南安彩高科股份有限公司 | A kind of desulphurization reaction pipe, desulfurization dust-removal system and its technique based on desulphurization reaction pipe |
| CN109173694B (en) * | 2018-09-28 | 2024-04-09 | 河南安彩高科股份有限公司 | Desulfurization reaction tube, desulfurization dust removal system based on desulfurization reaction tube and process of desulfurization dust removal system |
| CN113694762A (en) * | 2021-08-24 | 2021-11-26 | 西安热工研究院有限公司 | Self-adaptive adjustment dynamic ammonia injection mixer |
| CN114113498A (en) * | 2022-01-25 | 2022-03-01 | 光大环保技术装备（常州）有限公司 | Fluid flow velocity reverse disturbance purification test system and method for SCR denitration system |
| CN114113498B (en) * | 2022-01-25 | 2022-04-22 | 光大环保技术装备（常州）有限公司 | Fluid flow velocity reverse disturbance purification test system and method for SCR denitration system |
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Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |
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| CP03 | Change of name, title or address |