CN209530550U - A kind of energy-saving SCR denitration device - Google Patents
A kind of energy-saving SCR denitration device Download PDFInfo
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- CN209530550U CN209530550U CN201920146552.1U CN201920146552U CN209530550U CN 209530550 U CN209530550 U CN 209530550U CN 201920146552 U CN201920146552 U CN 201920146552U CN 209530550 U CN209530550 U CN 209530550U
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Abstract
The utility model relates to a kind of energy-saving SCR denitration devices, including hot-blast stove, rotary regenerative air heater and the gas approach being sequentially communicated, the denitration flue and exhaust pass of inverted U, by being disposed with the area Hun Feng being connected in denitration flue described in flow of flue gas direction, the area Pen An and catalytic domain, the area Pen An is connected with spray ammonia system, the SCR catalyst that haves three layers is arranged in the catalytic domain, the hot-blast stove includes furnace body, burner hearth, burner, exhanst gas outlet, with at least one air distribution entrance, gas entry is provided on the burner, combustion air entrance, gas piping is set at the gas entry, the combustion air entrance is connected with the gas approach by combustion-supporting air piping, the air distribution entrance is connected with the gas approach by air distribution pipeline；The exhanst gas outlet is connected with the area Hun Feng.The sintered discharge gas waste heat of rich coal gas and outlet that the utility model effectively utilizes iron and steel enterprise to diffuse, reduces sintering energy consumption.
Description
Technical field
The utility model relates to denitration devices, and in particular to a kind of energy-saving SCR denitration device.
Background technique
The outlet hot fume main component that sintering production is come is as follows:
| Serial number | Project | Parameter | Unit | Remarks |
| 1 | It is sintered discharged gas fume temperature | 90-110 | ℃ | |
| 2 | SO2Concentration | ≤25 | mg/Nm3 | 16% oxygen content of butt |
| 3 | NOxConcentration | 200~400 | mg/Nm3 | 16% oxygen content of butt |
| 4 | Dust concentration | ≤3 | mg/Nm3 | 16% oxygen content of butt |
| 5 | Flue gas oxygen content | ~16 | % | Wet basis |
| 6 | Flue gas water content | 10 | % |
For the cleaning qualified discharge for realizing sintering flue gas, generally nitrogen oxides is carried out only using SCR denitration technology at present
Change is handled, and the general design requirement of flue-gas temperature in SCR denitration is more than or equal to 280 DEG C, at this point, the work of catalyst activity object
Property highest, catalytic reduction reaction efficiency highest.But for iron and steel enterprise, the temperature of sintering flue gas only have 90 DEG C~
100 DEG C, 280 DEG C of high temperature is often not achieved, this will lead to denitrating system and cannot put into operation, and smoke emissioning concentration cannot expire at this time
Sufficient national requirements for environmental protection, therefore, it is necessary to heat before denitration to sintering flue gas, to meet its denitration demand.
In addition, iron and steel enterprise generally has rich coal gas, rich coal gas enters atmosphere after diffusing tower ignition
In, it can not efficiently use, cause the significant wastage of resource.
Therefore, it is necessary to a kind of using emission coal gas come the energy-saving SCR denitration device of heat-agglomerating flue gas, to realize sintering
The denitration of flue gas purifies.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of energy-saving SCR denitration device.
To achieve the above object, technical solution adopted in the utility model is as follows:
A kind of energy-saving SCR denitration device, including SCR denitration device and Smoke-heating device；The denitrification apparatus packet
The denitration flue and exhaust pass for including the gas approach, inverted U that are sequentially communicated, by denitration flue described in flow of flue gas direction according to
Secondary to be provided with the area Hun Feng being connected, the area Pen An and catalytic domain, the area Pen An is connected with spray ammonia system, and the catalytic domain is set
The SCR catalyst that haves three layers is set, the Smoke-heating device includes being set to below the denitration flue and being connected to gas approach, go out
The rotary regenerative air heater and hot-blast stove of mouth flue and the denitration flue；The hot-blast stove includes furnace body, is set to the furnace
Intracorporal burner hearth, the burner for being set to the lower portion of furnace body and being connected with burner hearth, be set to the upper of furnace body and with
At least one air distribution entrance that the burner hearth is connected, the exhanst gas outlet being set at the top of furnace body are provided on the burner
Gas piping, the combustion air entrance and the gas approach are arranged at the gas entry for gas entry and combustion air entrance
It is connected by combustion-supporting air piping, the air distribution entrance is connected with the gas approach by air distribution pipeline；The flue gas goes out
Mouth is connected with the area Hun Feng.
It further, further include being set to above the hot-blast stove and being connected with the exhanst gas outlet by short duct
Wind mixed chamber, and the air-distribution device of the connection wind mixed chamber and the area Hun Feng.
Further, the air-distribution device includes several and is respectively communicated with being evenly distributed with for the wind mixed chamber and the area Hun Feng
Pipe, several equal stringing inlets evens are distributed in the wind mixed chamber.
Further, the air distribution pipeline includes the main air distribution pipeline being sequentially communicated by air distribution flow direction and several branches
Air distribution pipeline, the other end of branch's air distribution pipeline are fixedly connected with corresponding air distribution entrance.
Further, it is provided with combustion fan in the combustion-supporting air piping, is provided with air distribution on the main air distribution pipeline
Blower.
Further, it is provided with control valve for coal gas on the gas piping, is provided in the combustion-supporting air piping combustion-supporting
Wind control valve is provided with air distribution control valve on branch's air distribution pipeline.
Further, cryogenic gas entrance, high-temperature gas outlet are provided on the rotary regenerative air heater, high-temperature gas enters
Mouth, cryogenic gas outlet；
The cryogenic gas entrance is connected with the gas approach, the high-temperature gas outlet and the denitration flue
Input end is connected；The high-temperature gas entrance is connected with the outlet end of the denitration flue, cryogenic gas outlet with
The exhaust pass is connected.
Further, the input end of the gas approach is connected with sintering machine, the outlet end of the exhaust pass and de-
Nitre blower is connected.
Compared with prior art, the utility model has the beneficial effects that:
1, the utility model uses rotary regenerative air heater, and the middle height of denitration flue outlet end is absorbed using rotary regenerative air heater
Heat in warm flue gas realizes the recycling of heat for heating 90~100 degrees Celsius of the sintering flue gas from gas approach
It utilizes, has reached energy-efficient purpose.
2, the utility model be arranged hot-blast stove, using iron and steel enterprise release coal gas as hot-blast stove heat source substance,
On the one hand the recycling for realizing coal gas, avoids the waste of resource；On the other hand, using existing sintering production come 90 DEG C
~100 DEG C of part hot fumes as the combustion air of gas-fired and the auxiliary gas source of mixed wind adjusting, by with suitable steel
The coal gas of iron enterprise release burns in hot-blast stove and is mixed into air distribution, finally mixes and meets denitrification apparatus catalysis reaction process life
The flue-gas temperature of production condition, the utility model maximum feature is: during flue gas heating, not needing any external
Surrounding air is as coal gas combustion-supporting air, all of being heated quenched part of smoke helping as hot-blast stove in flue collector
The air distribution of wind and air mixing device is fired, energy-saving effect is mainly reflected in the following aspects: 1) utilizing 90 DEG C~100 DEG C sintering heat
Flue gas, than having saved the energy as combustion air using 20 DEG C of surrounding air, does not on the one hand bring 20 DEG C into additionally as combustion air
Surrounding air, reduces discharged gas fume total amount, and on the other hand 90 DEG C~100 DEG C sintering hot fumes are as combustion air, heat content (with
20 DEG C of surrounding air is compared) raising facilitate hot-blast stove stablize burning and gas volume saving；2) gas approach is extracted
Interior 90 DEG C~100 DEG C of part hot fume is mixed and burned as combustion air and coal gas and heating of going back again after mixed wind is quenched passes through back
The remaining flue gas not extracted after rotatable air preheater heat exchange, realizes the heat inputted during whole system flue gas conditioning most
Few, the efficiency highest of flue gas conditioning realizes optimal process energy-saving effect.
The utility model can have effectively using the rich coal gas of iron and steel enterprise's release and the sintered discharge gas waste heat of outlet
The consumption of the saving energy of effect and the utilization of residual heat resources is provided, is the effective ways for reducing sintering energy consumption.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model one embodiment；
1, SCR denitration device in the figure, 2, gas approach, 3, denitration flue, 4, exhaust pass, 5, the area Hun Feng, 6, spray ammonia
Area, 7, catalytic domain, 8, spray ammonia system, 9, SCR catalyst, 10, rotary regenerative air heater, 11, hot-blast stove, 12, furnace body, 13, burner hearth,
14, burner, 15, air distribution entrance, 16, gas piping, 17, combustion-supporting air piping, 18, main air distribution pipeline, 19, branch's aid distributing pipe
Road, 20, wind mixed chamber, 21, equal stringing, 22, combustion fan, 23, air distribution blower, 24, control valve for coal gas, 25, combustion air control valve,
26, air distribution control valve, 27, short duct.
Specific embodiment
Further details of narration is carried out to the utility model below in conjunction with attached drawing.
A kind of one embodiment of energy-saving SCR denitration device as shown in Figure 1, the denitrification apparatus includes flue collector,
The flue collector includes the gas approach 2 being sequentially communicated, the denitration flue 3 of inverted U and exhaust pass 4, by flow of flue gas direction
The area Hun Feng 5 being connected, the area Pen An 6 and catalytic domain 7, the area Pen An 6 and spray ammonia system are disposed in the denitration flue 3
System 8 is connected, and the SCR catalyst 9 that haves three layers is arranged in the catalytic domain 7, which is characterized in that the Smoke-heating device includes setting
In 3 lower section of the denitration flue and it is connected to the rotary regenerative air heater 10 of gas approach 2, exhaust pass 4 and the denitration flue 3,
And hot-blast stove 11；The hot-blast stove 11 includes furnace body 12, and the burner hearth 13 being set in the furnace body 12 is set to the furnace body
12 lower parts and the burner 14 being connected with burner hearth 13 are set to 12 top of furnace body and are connected with the burner hearth 13
At least one air distribution entrance 15 is set to the exhanst gas outlet at 12 top of furnace body, is provided with gas entry on the burner 14, helps
Wind entrance is fired, gas piping 16 is set at the gas entry, the combustion air entrance and the gas approach 2 pass through combustion air
Pipeline 17 is connected, and the air distribution entrance 15 is connected with the gas approach 2 by air distribution pipeline；The exhanst gas outlet and institute
The area Shu Hunfeng 5 is connected.Hot-blast stove 11 is arranged in the utility model, using the coal gas of iron and steel enterprise's release as hot-blast stove 11
Heat source substance, on the one hand realize the recycling of coal gas, avoid the waste of resource；On the other hand, existing sintering is utilized
90 DEG C~100 DEG C part hot fumes that production comes are led to as the combustion air of gas-fired and the auxiliary gas source of mixed wind adjusting
It crosses the coal gas diffused with suitable iron and steel enterprise to burn in hot-blast stove 11 and be mixed into air distribution, finally mixes and meet denitrification apparatus
It is catalyzed the flue-gas temperature of reaction process working condition, the utility model maximum feature is: during flue gas heating, no
Need any external surrounding air as coal gas combustion-supporting air, all of being heated quenched part of smoke in flue collector
As the combustion air of hot-blast stove 11 and the air distribution of air mixing device, energy-saving effect is mainly reflected in the following aspects: 1 utilizes 90
DEG C~100 DEG C of sintering hot fumes as combustion air than having saved the energy as combustion air using 20 DEG C of surrounding air, on the one hand
It does not bring 20 DEG C of surrounding airs into additionally, reduces discharged gas fume total amount, on the other hand 90 DEG C~100 DEG C sintering hot fume conducts
Combustion air, raising of the heat content compared with 20 DEG C of surrounding air facilitate the section for stablizing burning and gas volume of hot-blast stove 11
About；90 DEG C~100 DEG C of part hot fume is mixed and burned as combustion air and coal gas and passes through mixed wind tune in 2 extraction gas approach 2
It goes back to heat the remaining flue gas not extracted after the heat exchange of rotary regenerative air heater 10 again after matter, realize in whole system flue gas conditioning
During the heat that inputs it is minimum, the efficiency highest of flue gas conditioning realizes optimal process energy-saving effect.
It further, further include being set to 11 top of hot-blast stove and passing through 27 phase of short duct with the exhanst gas outlet
The wind mixed chamber 20 of connection, and the air-distribution device of the connection wind mixed chamber 20 and the area Hun Feng 5.
Further, the air-distribution device includes several and is respectively communicated with the wind mixed chamber 20 and the area Hun Feng 5
Equal stringing 21, several equal 21 inlets evens of stringing are distributed in the middle part of the wind mixed chamber 20.Further, the equal stringing
21 be the pipeline of inner hollow, and the import of several equal stringings 21 is located in same level；The equal stringing 21 of the utility model
Being arranged can utmostly guarantee that the wind-warm syndrome of 5 each position of the area Hun Feng is consistent.
Further, the air distribution pipeline includes the main air distribution pipeline 18 being sequentially communicated by air distribution flow direction and several points
Air piping 19 is dominated, the other end of branch's air distribution pipeline 19 is fixedly connected with corresponding air distribution entrance 15.
Further, it is provided with combustion fan 22 in the combustion-supporting air piping 17, is provided on the main air distribution pipeline 18
Air distribution blower 23.
Further, it is provided with control valve for coal gas 24 on the gas piping 16, is provided in the combustion-supporting air piping 17
Combustion air control valve 25 is provided with air distribution control valve 26 on branch's air distribution pipeline 19.The setting of each control valve is used to control
The flow of corresponding pipeline.
Further, cryogenic gas entrance, high-temperature gas outlet, high-temperature gas are provided on the rotary regenerative air heater 10
Entrance, cryogenic gas outlet；
The cryogenic gas entrance is connected with the gas approach 2, the high-temperature gas outlet and the denitration flue 3
Input end be connected；The high-temperature gas entrance is connected with the outlet end of the denitration flue 3, the cryogenic gas outlet
It is connected with the exhaust pass 4.The utility model uses rotary regenerative air heater 10, absorbs denitration using rotary regenerative air heater 10
Heat in the high temperature flue gas of 3 outlet end of flue, for heating 90~100 degrees Celsius of the sintering cigarette from gas approach 2
Gas, and the flue gas after 10 cooling down of rotary regenerative air heater is discharged through exhaust pass 4, to realize the recycling benefit of heat
With having reached energy-efficient purpose.
Further, the input end of the gas approach 2 is connected with sintering machine, the outlet end of the exhaust pass 4 with
Denitration blower is connected.
When denitrification apparatus works, 90 DEG C~100 DEG C sintering flue gas temperature need to be heated to 280 ± 5 DEG C；The utility model
Flue gas working principle:
90 DEG C~100 DEG C of the hot fume from gas approach 2 is heated to 250 by rotary regenerative air heater GGH10 first
DEG C, remaining 30 DEG C of temperature rise needs to be mixed into rotary regenerative air heater using the high temperature flue gas after the burning energy medium of hot-blast stove 11
In 3 area Hun Feng 5 of denitration flue after GGH10 heating, 250 DEG C of flue gases are carried out quenched to 280 ± 5 DEG C, it is quenched after flue gas warp
Gametic fertility is qualified, then through the laggard inlet/outlet flue 4 of rotary regenerative air heater GGH10 heat exchange cooling, passes through the denitration air-introduced machine warp let-off
Chimney outlet.
The working principle of the utility model hot-blast stove 11:
Coal gas of converter from iron and steel enterprise is through gas regulator, burner 14 by natural gas fired in 11 furnace of hot-blast stove
It is mixed and burned in thorax 13 with 90 DEG C~100 DEG C of the hot fume in gas approach 2, forms about 1000 DEG C of flue gases after burning again
Mixed wind is carried out into wind mixed chamber 20 through short duct 27 after mixing with 90 DEG C in gas approach 2~100 DEG C of hot fumes, is led to
Cross medium temperature wind of the air distribution control valve 26 by the control of mixed wind-warm syndrome at 600 DEG C~650 DEG C, the medium temperature after wind mixed chamber 20 mixes
Denitration flue 3 Hun Feng area 5 of the wind after equal stringing 21 respectively enters rotary regenerative air heater GGH10 heating, with 250 DEG C after heating
Hot fume mix that wind is quenched again, it is quenched after flue-gas temperature condition meet denitrating technique requirement more than or equal to 280 DEG C.
When sintering production, turn on the gas-fire control valve 24, and regulation enters the gas volume burnt in 11 burner hearth 13 of hot-blast stove, root
According to denitrating technique demand control to heat, while being controlled after wind mixed chamber 20 mixes by the air distribution control valve 26 on air distribution pipeline
Flue-gas temperature, meet sintering denitrating technique requirement.
Embodiment described above is only the preferred embodiment of the utility model, and the not feasible implementation of the utility model
Exhaustion.For persons skilled in the art, it is made under the premise of without departing substantially from the utility model principle and spirit
Any obvious change out, should all be contemplated as falling within the claims of the utility model.
Claims (8)
1. a kind of energy-saving SCR denitration device, including SCR denitration device (1) and Smoke-heating device；The denitrification apparatus packet
The denitration flue (3) and exhaust pass (4) for including the gas approach (2), inverted U that are sequentially communicated are taken off as described in flow of flue gas direction
The area Hun Feng (5) being connected, the area Pen An (6) and catalytic domain (7), the area Pen An (6) and spray are disposed in smoke of gunpowder road (3)
Ammonia system (8) is connected, and catalytic domain (7) setting haves three layers SCR catalyst (9), which is characterized in that the flue gas dress
It sets including being set to below the denitration flue (3) and being connected to gas approach (2), exhaust pass (4) and the denitration flue
(3) rotary regenerative air heater (10) and hot-blast stove (11)；The hot-blast stove (11) includes furnace body (12), is set to the furnace
Burner hearth (13) in body (12), the burner (14) for being set to the furnace body (12) lower part and being connected with burner hearth (13), setting
In the furnace body (12) top and at least one air distribution entrance (15) for being connected with the burner hearth (13), it is set to furnace body
(12) exhanst gas outlet at the top of, is provided with gas entry and combustion air entrance on the burner (14), at the gas entry
It is arranged gas piping (16), the combustion air entrance is connected with the gas approach (2) by combustion-supporting air piping (17), described
Air distribution entrance (15) is connected with the gas approach (2) by air distribution pipeline；The exhanst gas outlet and the area Hun Feng (5) phase
Connection.
2. a kind of energy-saving SCR denitration device according to claim 1, which is characterized in that further include being set to the heat
Pass through the wind mixed chamber (20) that short duct (27) are connected above wind furnace (11) and with the exhanst gas outlet, and is connected to described mixed
The air-distribution device of air compartment (20) and the area Hun Feng (5).
3. a kind of energy-saving SCR denitration device according to claim 2, which is characterized in that if the air-distribution device includes
Dry root is respectively communicated with the equal stringing (21) in the wind mixed chamber (20) and the area Hun Feng (5), several equal stringing (21) imports
It is uniformly distributed in the wind mixed chamber (20).
4. a kind of energy-saving SCR denitration device according to claim 1, which is characterized in that the air distribution pipeline includes pressing
The main air distribution pipeline (18) and several branch's air distribution pipelines (19) that air distribution flow direction is sequentially communicated, branch's air distribution pipeline
(19) the other end is fixedly connected with corresponding air distribution entrance (15).
5. a kind of energy-saving SCR denitration device according to claim 4, which is characterized in that the combustion-supporting air piping (17)
On be provided with combustion fan (22), be provided with air distribution blower (23) on the main air distribution pipeline (18).
6. a kind of energy-saving SCR denitration device according to claim 4, which is characterized in that on the gas piping (16)
It is provided with control valve for coal gas (24), is provided with combustion air control valve (25) on the combustion-supporting air piping (17), branch's air distribution
Air distribution control valve (26) are provided on pipeline (19).
7. a kind of energy-saving SCR denitration device according to claim 1, which is characterized in that the rotary regenerative air heater
(10) cryogenic gas entrance, high-temperature gas outlet, high-temperature gas entrance, cryogenic gas outlet are provided on；
The cryogenic gas entrance is connected with the gas approach (2), the high-temperature gas outlet and the denitration flue (3)
Input end be connected；The high-temperature gas entrance is connected with the outlet end of the denitration flue (3), and the cryogenic gas goes out
Mouth is connected with the exhaust pass (4).
8. a kind of energy-saving SCR denitration device according to claim 1, which is characterized in that the gas approach (2) into
Mouth end is connected with sintering machine, and the outlet end of the exhaust pass (4) is connected with denitration blower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920146552.1U CN209530550U (en) | 2019-01-28 | 2019-01-28 | A kind of energy-saving SCR denitration device |
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| CN201920146552.1U CN209530550U (en) | 2019-01-28 | 2019-01-28 | A kind of energy-saving SCR denitration device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043620A (en) * | 2019-11-19 | 2020-04-21 | 华电电力科学研究院有限公司 | System and method for realizing SCR full-time denitration of coal-fired thermal power generating unit |
| CN112403182A (en) * | 2019-11-05 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Analytic tower and flue gas heating system |
| CN112774438A (en) * | 2021-02-24 | 2021-05-11 | 山西太钢不锈钢股份有限公司 | Method for using sintering waste gas in SCR denitration hot blast stove |
-
2019
- 2019-01-28 CN CN201920146552.1U patent/CN209530550U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403182A (en) * | 2019-11-05 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Analytic tower and flue gas heating system |
| CN112403182B (en) * | 2019-11-05 | 2022-12-02 | 中冶长天国际工程有限责任公司 | Analytic tower and flue gas heating system |
| CN111043620A (en) * | 2019-11-19 | 2020-04-21 | 华电电力科学研究院有限公司 | System and method for realizing SCR full-time denitration of coal-fired thermal power generating unit |
| CN112774438A (en) * | 2021-02-24 | 2021-05-11 | 山西太钢不锈钢股份有限公司 | Method for using sintering waste gas in SCR denitration hot blast stove |
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Address after: Room 101, 1st floor, No.10 courtyard, No.4, Dongbinhe Road, Haidian District, Beijing 100085 Patentee after: BEIJING SINOWISE Co.,Ltd. Address before: 100085, Beijing, Haidian District Qinghe East Jiayuan, building 836, room 1 Patentee before: BEIJING SINOWISE Co.,Ltd. |