CN207786296U - Denitration in Boiler system - Google Patents
Denitration in Boiler system Download PDFInfo
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- CN207786296U CN207786296U CN201721485427.0U CN201721485427U CN207786296U CN 207786296 U CN207786296 U CN 207786296U CN 201721485427 U CN201721485427 U CN 201721485427U CN 207786296 U CN207786296 U CN 207786296U
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- denitration
- boiler
- discharging pipe
- smoke discharging
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Abstract
The utility model discloses a kind of Denitration in Boiler system comprising：Boiler furnace, denitrating system and several pipeline, the pipeline have burner hearth smoke discharge tube road, the preceding smoke discharging pipe for being connected to the denitrating system downstream and rear smoke discharging pipe；The Denitration in Boiler system, which is further provided with the air preheater between forward and backward smoke discharging pipe and is connected on rear smoke discharging pipe, removes dust mechanism, the heat exchanger tube is located in boiler furnace, inlet duct and outlet conduit each extend over out on the outside of boiler furnace, and inlet duct end is connected on smoke discharging pipe, which is connected to denitrating system；Above-mentioned burner hearth smoke discharge tube road one end is connected to above-mentioned boiler furnace, and the other end is connected to the denitrating system.The powder dust in heat exchanger tube and reaction system can be reduced, so that it is guaranteed that the stability and reliability of denitrating system long-term operation, realize the target of coal-burning power plant's minimum discharge, in addition, flue gas after denitrating system can be again conveyed into heat exchange and the reaction treatment as subsequent handling in heat exchanger tube, utilized convenient for the off-gas recovery after reacting.
Description
【Technical field】
The utility model is related to a kind of Denitration in Boiler system of coal-burning power plant more particularly to a kind of out of stock boiler are de-
Nitre system.
【Background technology】
Chinese utility model patent the 201520986907.Xth disclosed in 11 days Mays in 2016 is please referred to, is disclosed
A kind of flue-gas denitration process system, includes boiler, pyrolysis oven, SCR reactors, boiler is connect by flue with pyrolysis oven
Together, it is introduced in high-temperature flue gas to pyrolysis oven directly out of boiler by flue, it is right since boiler smoke dust is higher
The requirement of pyrolysis oven is very high, and to prevent the systems such as pyrolysis oven or SCR reactors from being blocked by dust, need irregularly to its into
Row cleaning to increase manual maintenance cost, and influences the use of flue-gas denitration process system.
In addition, referring again to Chinese utility model patent the 201721080360.2nd, a kind of boiler smoke is disclosed
Heat exchange pipeline is placed into boiler furnace by denitration device, and one end conveys gas by air-cooler, by heat exchanger tube by air
After heat exchange processing, as subsequent pyrolysis and SCR heat source for reaction.It is used as pyrolysis and reactant gas source by the air-cooler, because of cold wind
Temperature there was only 25 degree of room temperature hereinafter, by heat exchange processing when may temperature be unable to reach pyrolysis temperature, be unfavorable for subsequent
Pyrolysis and reaction treatment, and heat exchanger tube temperature is directly raised to 450 degree or more from low temperature and is easy to happen breakage problem.
Thus, it is desirable to design it is a kind of it is with good investment, reduce pollution, the few Denitration in Boiler system of maintenance needs to adapt to market
It asks.
【Utility model content】
In order to solve the above technical problems, the utility model provides a kind of Denitration in Boiler system reducing powder dust.
The utility model is achieved through the following technical solutions：A kind of Denitration in Boiler system comprising：Boiler furnace takes off
Nitre system and several pipeline, the preceding smoke discharging pipe which has burner hearth smoke discharge tube road, is connected to the denitrating system downstream
And rear smoke discharging pipe；The Denitration in Boiler system is further provided with air preheater and company between forward and backward smoke discharging pipe
It passes on rear smoke discharging pipe and removes dust mechanism, preceding smoke discharging pipe is connected between air preheater and denitrating system, rear to discharge fume
Pipeline is connected to the air preheater downstream；The Denitration in Boiler system further includes heat exchanger mechanism, which sets
There are the outlet conduit for the flue gas inlet duct entered, the heat exchanger tube and connection heat exchanger tube that connect inlet duct, the heat exchanger tube
In boiler furnace, inlet duct and outlet conduit each extend over out on the outside of boiler furnace, and inlet duct end is connected to
On smoke discharging pipe, which is connected to denitrating system；Above-mentioned burner hearth smoke discharge tube road one end is connected to above-mentioned boiler furnace,
The other end is connected to the denitrating system.
Further comprise having：Smoke discharging pipe has also been sequentially communicated desulfurizing tower and chimney after above-mentioned, and inlet duct is connected to
Except on the rear smoke discharging pipe between dust mechanism and desulfurizing tower.
Further comprise having：The denitrating system includes pyrolysis mechanism, SCR reactors and wind pipe, the wind pipe
One end connection pyrolysis mechanism, the other end are connected in burner hearth smoke discharge tube road, the above-mentioned outlet conduit of pyrolysis mechanism connection, stove
Thorax smoke discharge tube road is connected to SCR reactors.
Further comprise having：The denitrating system includes pyrolysis mechanism, SCR reactors and connection pyrolysis mechanism and SCR anti-
The wind pipe of device is answered, the above-mentioned outlet conduit of pyrolysis mechanism connection, burner hearth smoke discharge tube road is connected to SCR reactors.
Further comprise having：The Denitration in Boiler system further comprises the wind turbine being connected on inlet duct.
Further comprise having：When opposite boiler furnace vertical display, the inlet duct is located at the downside of outlet conduit.
Further comprise having：There is above-mentioned pipeline a wind pipe, a wind pipe to be connected to above-mentioned air preheater extremely
The bottom of boiler furnace.
Further comprise having：Above-mentioned Denitration in Boiler system is equipped with the cold wind regulating mechanism being connected to outlet conduit and setting exists
Regulating valve on the cold wind regulating mechanism.
Further comprise having：The Denitration in Boiler system further comprises the electric heater for having positioned at denitrating system upstream.
The beneficial effects of the utility model are as follows：It is put into boiler furnace by using heat exchanger tube and carries out heat exchange as denitration
The high-temperature flue gas heat source of system, and inlet duct is connected in the rear smoke discharging pipe except dust mechanism downstream, phase
To the prior art, the powder dust in heat exchanger tube and reaction system can be reduced, so that it is guaranteed that the stabilization of denitrating system long-term operation
Property and reliability, realize coal-burning power plant's minimum discharge target, changed in addition, can be conveyed into the flue gas after denitrating system again
Heat exchange and the reaction treatment as subsequent handling in heat pipe, utilize convenient for the off-gas recovery after reacting.
【Description of the drawings】
Fig. 1 is the schematic diagram of the utility model Denitration in Boiler system embodiment.
【Specific implementation mode】
As shown in Figure 1, a kind of Denitration in Boiler system embodiment being related to for utility model comprising boiler furnace 1,
Heat exchanger mechanism 2, denitrating system 3, several wind turbines 4, air preheater 5, cold wind regulating mechanism 6, several valves 8, electric heater 9
And several pipeline；The boiler furnace 1 is the equipment for generating high-temperature flue gas.
Heat exchanger tube 22 and company of the heat exchanger mechanism 2 with the inlet duct 21, connection inlet duct entered for flue gas
Connect the outlet conduit 23 of heat exchanger tube 22.The denitrating system 3 is located at 1 outside of boiler furnace, and the heat exchanger tube 22 is located at Boiler Furnace
In thorax 1, inlet duct 21 and outlet conduit 23 each extend over out 1 outside of boiler furnace, which is connected to denitration system
System 3, in present embodiment, which is connected in pyrolysis mechanism 31 and (is detailed later), and the inlet duct 21 is connected to
To rear smoke discharging pipe 73.
Above-mentioned wind turbine 4 is communicated on inlet duct 21, can be right by the wind turbine 4 when the pressure in smoke discharging pipe is inadequate
Supercharging, is conveyed into convenient for flue gas in inlet duct 21 in denitrating system 3, and the flue gas after heat exchange is reachable in inlet duct 21
450 DEG C or more, using the heat source as follow-up denitrating system 3；In the present embodiment, because 1 downside temperature of boiler furnace relatively on
Side temperature is low, so above-mentioned inlet duct 21 is located at the downside of outlet conduit 23, so that low-temperature flue gas is into fashionable, by low temperature
It gradually exchanges heat towards high temperature side, can prevent heat exchanger tube 22 from rupturing and being conducive to the effect of uniform heat exchange.
The Denitration in Boiler system further comprises the electric heater 9 for having positioned at 3 upstream of denitrating system, in present embodiment
In, which is to be located at pyrolysis mechanism 31 upper end, when boiler furnace 1 is during just starting operation, due to temperature compared with
It is low, that is, it, can be right by electric heater 5 when the flue-gas temperature after exchanging heat does not reach minimum pyrolysis temperature (such as 450 degree or more)
Flue gas is heated, and the pyrolytic reaction demand of denitrating system 3 is reached.
The pipeline includes burner hearth smoke discharge tube road 71, preceding smoke discharging pipe 72 and rear smoke discharging pipe 73；Above-mentioned burner hearth cigarette
71 one end of gas discharge line is connected to above-mentioned boiler furnace 1, and the other end is connected to the denitrating system 3；The burner hearth smoke discharge tube road
71 be to be connected to the bottom of boiler furnace 1, or be interpreted as the economizer 11 that burner hearth smoke discharge tube road 71 connects boiler furnace
Lower end send boiler combustion flue gas to denitration process is carried out in above-mentioned denitrating system, in present embodiment, burner hearth flue gas discharge
Pipeline 71 is attached in SCR reactors 32, is detailed later.
Above-mentioned heat exchanger tube 22 is located at the upper end of above-mentioned boiler furnace 1, or is interpreted as heat exchanger tube 22 and is located at boiler furnace
Place's temperature can be up to 450 degree or more of region, and the flue gas after the boiler furnace 1 heat exchange is transported to the denitration system as a result,
Convenient for generation pyrolytic reaction in system 3.
In present embodiment, the denitrating system 3 includes pyrolysis mechanism 31, SCR reactors 32 and connects therebetween
Wind pipe 33, which is connected to above-mentioned outlet conduit 23, and 33 one end of above-mentioned wind pipe is connected to pyrolysis machine
On structure 31, the other end is connected in burner hearth smoke discharge tube road 71, and via the burner hearth smoke discharge tube road 71 and SCR reactors
Flue gas after pyrolysis is sufficiently mixed with the high-temperature flue gas in burner hearth smoke discharge tube road 71 and is uniformly transported to SCR again by 3 connections
In reactor 32, convenient for fully reaction, lowers loss and prevent not sufficiently reactive pernicious gas from entering in air, in outlet
Road 23 is equipped with valve 8, facilitates the maintenance of system.
Above-mentioned preceding smoke discharging pipe 72 is connected between air preheater 5 and SCR reactors 32, and rear smoke discharging pipe 73 connects
It to 5 downstream of air preheater, and has been sequentially communicated except dust mechanism 81, desulfurizing tower 82 and chimney 83, to pass through SCR reactors
32 flue gas passes through except dust, desulfurization process, final qualified discharge, prevents pollution environment, and above-mentioned inlet duct 21 is connected to
Afterwards 73 on smoke discharging pipe on, i.e., the inlet duct 21 is connected to except the heel row between 82 upstream of 81 downstream of dust mechanism and desulfurizing tower
On smoke pipeline 73.
Above-mentioned pipeline is additionally provided with a wind pipe 75, which is connected to above-mentioned air preheater 5 to Boiler Furnace
The bottom of thorax 1 has to the supercharging of boiler furnace 1, combustion-supporting and other effects.
The utility model is put into the flue gas heat that heat exchange is carried out in boiler furnace 1 as denitrating system by using heat exchanger tube 22
Source, and be connected in rear smoke discharging pipe 73 by 21 one end of inlet duct, and the inlet duct 21 is connect with rear smoke discharging pipe 73
Place is located at except 81 downstream of dust mechanism can reduce the powder dust in pipeline and denitrating system compared with the prior art, so that it is guaranteed that de-
The stability and reliability of 3 long-term operation of nitre system realize the target of coal-burning power plant's minimum discharge；And the high temperature of the junction
Flue-gas temperature can reach 110 degree or more, be advantageously implemented the flue-gas temperature by heat exchange processing reach required pyrolysis with it is anti-
Temperature is answered, and the problem of easily making heat exchanger tube 22 split after above-mentioned heat exchanger tube 22 increases rapidly because of low temperature can be improved, extends and uses the longevity
Life, meanwhile, the high-temperature flue-gas after heat exchange is excessively high, the utility model is equipped with cold wind on above-mentioned outlet conduit 23
Regulating mechanism 6 and the regulating valve 61 being arranged on the cold wind regulating mechanism, the amount to adjust the cold wind for entering outlet conduit 23 can
Temperature adjustment is carried out to the high-temperature flue gas in conveying denitrating system 3, compared with the prior art, which has
Temperature is can easily be accommodated, keeps flue gas denitrification system long period to be in steady-working state, and reduce consumption.
In addition, the utility model is by the way that above-mentioned inlet duct 21 to be connected on 73 on rear smoke discharging pipe, it will be anti-through SCR
Flue gas after answering is conveyed into heat exchange and the heat source for reaction as subsequent handling in heat exchanger mechanism 2 again, is conducive to after reacting
Off-gas recovery utilize.
Certainly, above-mentioned wind pipe 33 also may be connected directly on SCR reactors 32, and the flue gas after pyrolysis is directly transported
Into SCR reactors 32, that is, it is pyrolyzed mechanism 31 and is connected to 33 one end of above-mentioned wind pipe, 33 other end of wind pipe and burner hearth flue gas
Discharge line 71 is connected to together in SCR reactors 32.
Claims (9)
1. a kind of Denitration in Boiler system comprising：Boiler furnace (1), denitrating system (3) and several pipeline, the pipeline have stove
Thorax smoke discharge tube road (71), the preceding smoke discharging pipe (72) and rear smoke discharging pipe (73) for being connected to the denitrating system downstream；It is described
Denitration in Boiler system is further provided with the air preheater (5) between forward and backward smoke discharging pipe and is connected to rear smoke discharging pipe
(73) dust mechanism (81) is removed on, preceding smoke discharging pipe (72) is connected between air preheater (5) and denitrating system (3), after
Smoke discharging pipe (73) is connected to the air preheater (5) downstream；It is characterized in that：The Denitration in Boiler system further includes heat exchange
Device mechanism (2), the heat exchanger mechanism (2) is equipped with the inlet duct (21) entered for flue gas, the heat exchanger tube of connection inlet duct
(22) and the outlet conduit (23) of connection heat exchanger tube, the heat exchanger tube are located in boiler furnace (1), inlet duct (21) and outlet
Pipeline (23) each extends over out on the outside of boiler furnace (1), and inlet duct end is connected on rear smoke discharging pipe (73), the outlet
Pipeline (23) is connected to denitrating system (3)；Above-mentioned burner hearth smoke discharge tube road (71) one end is connected to above-mentioned boiler furnace (1), separately
One end is connected to the denitrating system (3).
2. Denitration in Boiler system as described in claim 1, it is characterised in that：Smoke discharging pipe has also been sequentially communicated desulfurization after above-mentioned
Tower (82) and chimney (83), and inlet duct (21) is connected to except the rear smoke exhaust pipe between dust mechanism (81) and desulfurizing tower (82)
On road (73).
3. Denitration in Boiler system as claimed in claim 1 or 2, it is characterised in that：The denitrating system includes pyrolysis mechanism
(31), SCR reactors (32) and wind pipe (33), wind pipe one end connection pyrolysis mechanism (31), the other end is connected to
In burner hearth smoke discharge tube road (71), the above-mentioned outlet conduit of pyrolysis mechanism connection (23), burner hearth smoke discharge tube road (71) is even
Pass to SCR reactors.
4. Denitration in Boiler system as claimed in claim 1 or 2, it is characterised in that：The denitrating system includes pyrolysis mechanism
(31), SCR reactors (32) and the wind pipe (33) of connection pyrolysis mechanism and SCR reactors, the pyrolysis mechanism connection are above-mentioned
Outlet conduit (23), burner hearth smoke discharge tube road (71) are connected to SCR reactors (32).
5. Denitration in Boiler system as described in claim 1, it is characterised in that：The Denitration in Boiler system further comprises connecting
Wind turbine (4) on inlet duct (21).
6. Denitration in Boiler system as described in claim 1, it is characterised in that：When opposite boiler furnace vertical display, it is described enter
Mouth pipeline (21) is located at the downside of outlet conduit (23).
7. Denitration in Boiler system as described in claim 1, it is characterised in that：Above-mentioned pipeline has a wind pipe (75), should
A wind pipe is connected to above-mentioned air preheater (5) to the bottom of boiler furnace (1).
8. Denitration in Boiler system as described in claim 1, it is characterised in that：Above-mentioned Denitration in Boiler system is equipped with and outlet conduit
(23) the cold wind regulating mechanism (6) being connected to and the regulating valve (61) being arranged on the cold wind regulating mechanism.
9. Denitration in Boiler system as described in claim 1, it is characterised in that：The Denitration in Boiler system further comprises there is position
Electric heater (9) in denitrating system (3) upstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721485427.0U CN207786296U (en) | 2017-11-08 | 2017-11-08 | Denitration in Boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721485427.0U CN207786296U (en) | 2017-11-08 | 2017-11-08 | Denitration in Boiler system |
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| Publication Number | Publication Date |
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| CN207786296U true CN207786296U (en) | 2018-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721485427.0U Active CN207786296U (en) | 2017-11-08 | 2017-11-08 | Denitration in Boiler system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395579A (en) * | 2018-11-29 | 2019-03-01 | 鞍山华泰环能工程技术有限公司 | A kind of outer pre-heating system of coke oven combustion air |
| CN110170248A (en) * | 2019-02-02 | 2019-08-27 | 昆山市三维换热器有限公司 | Natural wind heats denitrating system |
-
2017
- 2017-11-08 CN CN201721485427.0U patent/CN207786296U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395579A (en) * | 2018-11-29 | 2019-03-01 | 鞍山华泰环能工程技术有限公司 | A kind of outer pre-heating system of coke oven combustion air |
| CN110170248A (en) * | 2019-02-02 | 2019-08-27 | 昆山市三维换热器有限公司 | Natural wind heats denitrating system |
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