CN209541454U - A kind of denitration fume extractor and regenerative combustion system - Google Patents
A kind of denitration fume extractor and regenerative combustion system Download PDFInfo
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- CN209541454U CN209541454U CN201920013061.XU CN201920013061U CN209541454U CN 209541454 U CN209541454 U CN 209541454U CN 201920013061 U CN201920013061 U CN 201920013061U CN 209541454 U CN209541454 U CN 209541454U
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- denitration
- fume extractor
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Abstract
The utility model discloses a kind of denitration fume extractor and regenerative combustion systems, wherein denitration fume extractor includes the fume extractor main body, SNCR denitration structure and SCR denitration structure for being fixed on Thermal Equipment.The channel of connection Thermal Equipment is equipped in fume extractor main body, SNCR denitration structure and SCR denitration structure are built in channel；Reducing agent supply system outside the connection of SNCR denitration structure；Flue gas successively passes through SNCR denitration structure and the discharge of SCR denitration structure.The temperature that denitration fume extractor and regenerative combustion system provided by the utility model pass through control flue gas, realize that in the selective non-catalytic reduction denitration of high temperature section and in the selective-catalytic-reduction denitrified of low-temperature zone, the nitrogen oxides in flue gas is greatly reduced by denitration twice for flue gas.
Description
Technical field
The utility model relates to the gas denitrifying technology of heat storage type combustion, in particular to a kind of denitration fume extractor and accumulation of heat
Formula combustion system.
Background technique
Thermal Equipment such as uses blast furnace gas for the heater for rolling steel of fuel, generallys use air, coal gas Two-cuff Technique at present
Formula combustion technology.In regenerative combustion technology, heat-accumulating burner is installed in couples in Thermal Equipment, heat-accumulating burner can be used for
It is passed through air/gas into Thermal Equipment, and the flue gas in Thermal Equipment is discharged, by the operation for controlling air and coal gas
Direction, when a part of heat-accumulating burner is into air/gas, another part burner smoke discharging.Wherein, heat-accumulating burner includes accumulation of heat
Formula burner body and the heat storage being built in regenerative burner body.When smoke evacuation, heat storage heat absorption with to flue gas cool-down, into
When air/gas, heat storage heat release heats air/gas.
But the NO because containing in flue gas of heating furnacexIt is to be generated in combustion process, and flue gas directly passes through smoke stack emission,
Therefore current furnace operation person there is no effective control means for the discharge of flue gas.As steel and iron industry atmosphere pollution is arranged
Put the continuous improvement of standard, it is necessary to effectively be handled flue gas of heating furnace, make NO in flue gasxConcentration is greatly lowered,
Meet the requirement of minimum discharge.
Utility model content
The purpose of this utility model is to provide a kind of denitration fume extractor and regenerative combustion systems, solve in flue gas
NOxHighly concentrated technical problem.
To solve the above-mentioned problems, the technical solution of the utility model is:
A kind of denitration fume extractor, fume extractor main body, SNCR denitration structure and SCR including being fixed on Thermal Equipment
Denitration structure；
It is equipped with the channel for being connected to the Thermal Equipment in the fume extractor main body, the SNCR denitration structure and described
SCR denitration structure is built in the channel；Reducing agent supply system outside the SNCR denitration structure connection；Flue gas is successively
It is discharged after SNCR denitration structure and SCR denitration structure.
Preferably, the SNCR denitration structure includes the first heat storage, reduction chamber and reductant nozzle, and described first stores
Hot body is installed on one end of the close Thermal Equipment in the channel, and described go back is formed between the first heat storage and SCR denitration structure
Former chamber, the reductant nozzle connection reduction chamber and the reducing agent supply system.
Preferably, there are four the reductant nozzles for arranged for interval in fume extractor main body.
Preferably, the outer ring of the reductant nozzle is arranged with casing, there is circulation between described sleeve pipe and reductant nozzle
Coolant liquid.
Preferably, the SCR structure include the second heat storage and catalytic thermal storage special brick, second heat storage close to
SNCR denitration structure setting, flue gas are discharged after carrying out SCR denitration reaction by the catalytic thermal storage special brick.
Preferably, the fume extractor main body is regenerative burner body.
Preferably, the control of the reversal valve and reducing agent supply system output reducing agent of the regenerative burner body is controlled
Part linkage setting.
The utility model additionally provides a kind of regenerative combustion system, and the burner of regenerative combustion system is using as described above
Denitration fume extractor.
Preferably, Thermal Equipment includes groove and burner hole；It is equipped in the groove to position denitration fume extractor
Locating piece, groove form the breeze way to buffer flue gas flow rate between the locating piece and burner hole.
Compared with the existing technology, the beneficial effects of the utility model are:
1, denitration fume extractor provided by the utility model realizes flue gas in the choosing of high temperature section by the temperature of control flue gas
Selecting property non-catalytic reduction denitration and in the selective-catalytic-reduction denitrified of low-temperature zone, greatly reduces flue gas by denitration twice
In nitrogen oxides.
2, denitration fume extractor reacts remaining reducing agent at SCR denitration structure in catalyst in SNCR denitration structure
Under the action of the reaction was continued, to improve the utilization rate of reducing agent, and keep denitration efficiency higher.
3, cooling is the necessary operation of Thermal Equipment smoke evacuation, and denitration fume extractor rationally utilizes two temperature sections of flue gas,
Realize the technical effect of the denitration in smoke evacuation；And SNCR denitration and SCR denitration have been integrated in a denitration by the utility model
On fume extractor, and the equipment that denitration fume extractor can be made into such as heat-accumulating burner size, therefore, in installation denitration smoke evacuation dress
When setting, big improvement will not be carried out to Thermal Equipment and entire combustion system.
Detailed description of the invention
Fig. 1 is the schematic diagram of the denitration fume extractor of the utility model, wherein a figure schematic construction, and b diagram meaning flue gas is de-
Range of temperature in nitre fume extractor；
Fig. 2 is the sectional view along A-A of Fig. 1.
Wherein, 1, fume extractor main body, 2, SNCR denitration structure, the 201, first heat storage, 202, reduction chamber, 203, reduction
Agent nozzle, 3, SCR denitration structure, the 301, second heat storage, 302, catalytic thermal storage special brick, 4, Thermal Equipment, 401, burner hole,
402, groove, 403, floater guide block.
Specific embodiment
It is described in detail below in conjunction with the drawings and specific embodiments.
A kind of denitration fume extractor referring to FIG. 1-2, fume extractor main body 1, SNCR including being fixed on Thermal Equipment 4
Denitration structure 2 and SCR denitration structure 3；
The channel of connection Thermal Equipment 4 is equipped in fume extractor main body 1, in SNCR denitration structure 2 and SCR denitration structure 3
It is placed in channel；SNCR denitration structure 2 connects external reducing agent supply system；Flue gas successively passes through 2 He of SNCR denitration structure
SCR denitration structure 3 is discharged.
Specifically: denitration fume extractor is fixed in Thermal Equipment 4, be can be used for denitration and is discharged in Thermal Equipment 4
Flue gas can be the device for being specifically intended for smoke evacuation, be also possible to integrate device (such as the heat accumulating type burning of smoke evacuation and air inlet
Mouth), following any embodiments can any one in the denitration fume extractor based on two kinds of forms.Thermal Equipment 4 for example adds
Hot stove, dore furnace etc., below to use blast furnace gas to be illustrated for the heater for rolling steel of fuel.
SNCR denitration structure 2 is arranged in one end of the close Thermal Equipment 4 in channel, flue gas from Thermal Equipment 4 come out after i.e.
Into SNCR denitration structure 2.SNCR denitration structure 2 is based at selective non-catalytic reduction progress denitration to accumulation of heat and to flue gas
Reason.The purpose of 2 accumulation of heat of SNCR denitration structure is to control the temperature of flue gas, and make flue gas at the temperature in a certain stage in section
850-1100 DEG C, reducing agent supply system is that denitration fume extractor, reducing agent are connected at the position corresponding to the temperature range
The reducing agent of feed system can be used ammonium hydroxide, hydrogen, urea, hydrogen propylhomoserin it is any.Reducing agent is in the temperature range and cigarette
Gas is sufficiently mixed and reacts, and the nitrogen oxides in flue gas is reduced into nitrogen and water.
SCR denitration structure 3 is arranged in one end of the separate Thermal Equipment 4 in channel, and flue gas carries out the from SNCR denitration structure 2
Enter SCR denitration structure 3 after denitration and carries out secondary denitration.SCR denitration structure 3 is based on selection to accumulation of heat and to flue gas
Property catalysis reduction carry out denitration process.The first purpose of 3 accumulation of heat of SCR denitration structure is to control the temperature of flue gas, and flue gas is made to exist
The temperature in a certain stage is in 180-420 DEG C of section, selective-catalytic-reduction denitrified to carry out.
It can be seen from the above, temperature of the denitration fume extractor provided by the utility model by control flue gas, realizes that flue gas exists
The selective non-catalytic reduction denitration of high temperature section and in the selective-catalytic-reduction denitrified of low-temperature zone, it is very big by denitration twice
Reduce the nitrogen oxides in flue gas.Remaining reducing agent is reacted in SNCR denitration structure 2 to urge at SCR denitration structure 3
The reaction was continued under the action of agent, to improve the utilization rate of reducing agent, and keeps denitration efficiency higher.In addition, cooling is heat
The necessary operation that construction equipment 4 is discharged fume, the utility model rationally utilize two temperature sections of flue gas, realize the denitration in smoke evacuation
Technical effect；And SNCR denitration and SCR denitration have been integrated on a denitration fume extractor by the utility model, and denitration is arranged
The equipment that cigarette device can be made into such as heat-accumulating burner size therefore, will not be to Thermal Equipment when installing denitration fume extractor
4 and entire combustion system carry out big transformation, so as to be generally applicable to existing combustion system.
Please continue to refer to Fig. 1-2, in one embodiment, SNCR denitration structure 2 includes the first heat storage 201, reduction chamber
202 and reductant nozzle 203.First heat storage 201 is installed on one end of the close Thermal Equipment 4 in channel, the first heat storage
The reduction chamber 202, the connection of reductant nozzle 203 reduction chamber 202 and above-mentioned reduction are formed between 201 and SCR denitration structure 3
Agent feed system.
Specifically: the first heat storage 201 can be arranged close to heating furnace, exist from the flue-gas temperature section that heating furnace comes out
1200-1350 DEG C, therefore high-temperature heat accumulation brick can be used in the first heat storage 201, reaches after flue gas and 201 heat exchange of the first heat storage
When restoring chamber 202, temperature is down to 850-1100 DEG C of temperature range of suitable SNCR denitration reaction.Reductant nozzle 203 is through row
Cigarette apparatus main body 1 is simultaneously connected to reduction chamber 202 and reducing agent supply system, reducing agent and the flue gas hybrid concurrency in reduction chamber 202
Raw reaction.In addition, the first heat storage 201 can be directly anchored on channel, other structures can also be used and be fixed on channel indirectly
In.
In various embodiments, the structure different from above-mentioned technical proposal can also be used in SNCR denitration structure, as long as
The denitration based on SNCR denitration principle can be realized for flue gas.
Further, there are four above-mentioned reductant nozzle 203, each reductant nozzles 203 for arrangement in fume extractor main body 1
Reducing agent supply system is accessed by reducing agent process pipelines.Specifically: arranging multiple reductant nozzles from different perspectives
203 can be such that reducing agent sprays into from different directions, thus reducing agent can more uniformly be mixed with flue gas, so that reduction reaction
More sufficiently.Fig. 2 is illustrated by taking rectangular fume extractor main body 1 as an example, and four reductant nozzles 203 are arranged in smoke evacuation dress
On the seamed edge for setting main body 1.But in various embodiments, fume extractor main body 1 can also be column structure or other knots
Structure, the quantity of reductant nozzle 203 can be not limited to four, and reductant nozzle 203 can also be evenly arranged on fume extractor main body 1
Surrounding.
Further, the outer ring of reductant nozzle 203 is arranged with casing, there is circulation between casing and reductant nozzle 203
Coolant liquid.Specifically: under working condition, the temperature in fume extractor main body 1 and reduction chamber 202 is very high, and coolant liquid is effective
Control the temperature of nozzle interior (i.e. reducing agent).
Further, reductant nozzle 203 can be used such as mechanical atomization spray gun, atomizing medium can be selected nitrogen or its
Its inert gas.
Further, flow valve control flow can be used in reductant nozzle 203, so as to combine nitrogen oxides in effluent
Content realizes the technical effect for quantitatively conveying reducing agent.
In one embodiment, SCR structure includes the second heat storage 301 and catalytic thermal storage special brick 302.Second heat storage
301 are discharged after carrying out SCR denitration reaction by catalytic thermal storage special brick 302 close to SCNR denitration structure setting, flue gas.
Specifically: the second heat storage 301 is arranged close to reduction chamber 202, and flue gas reacts in reduction chamber 202 with reducing agent
Enter the second heat storage 301 together with reactant etc. one is logical afterwards.Conventional gitter brick can be used in second heat storage 301, with flue gas
Heat exchange is carried out, temperature range is at 180-420 DEG C when flue gas being made to reach catalytic thermal storage special brick 302.Catalytic thermal storage special brick 302
Catalysis and heat accumulation function are had both, remaining reducing agent is reacted in SNCR denitration structure 2 and is continued under the effect of the catalyst and nitrogen oxygen
Compound reduction reaction, to improve the utilization rate of reducing agent.
In one embodiment, fume extractor main body 1 is regenerative burner body, that is, denitration fume extractor is used and is based on
The device of heat-accumulating burner, can be used in regenerative combustion system.
Further, the reversal valve of control regenerative burner body commutation and control reducing agent supply system export reducing agent
Control section link setting.That is, regenerative burner body commutate to smoke evacuation state when, reducing agent supply system passes through reducing agent
Nozzle 203 conveys reducing agent to reduction chamber 202, and when regenerative burner body commutates to air inlet (gas/air), reducing agent is supplied
Reducing agent no longer is exported into reduction chamber 202 to system control reductant nozzle 203.
The utility model additionally provides a kind of regenerative combustion system, and the burner of regenerative combustion system can be used as taken up an official post
One denitration fume extractor as described in the examples.The Thermal Equipment 4 for installing denitration fume extractor is also regenerative combustion system
One component, Thermal Equipment 4 include furnace wall, and the intermediate region that furnace wall is enclosed is burner hearth, and denitration fume extractor is mounted on
On the outer wall of furnace wall, i.e., denitration fume extractor is located at outside furnace, shown in Fig. 1 (a).
In one embodiment, the Thermal Equipment 4 of regenerative combustion system includes groove 402 and burner hole 401.Wherein,
The locating piece to position denitration fume extractor is equipped in groove 402, groove 402 is formed between locating piece and burner hole 401
To buffer the breeze way of flue gas flow rate.
Specifically: groove 402 is located on furnace wall, and floater guide block 403 can be selected in locating piece, and floater guide block 403 is fixed on groove 402
End, to be positioned to the first heat storage 201；A kind of mounting means of floater guide block 403, i.e. floater guide block 403 are given in Fig. 1
One end limited by groove 402, the other end of floater guide block 403 limits the first heat storage 201, the surrounding of floater guide block 403 can with it is recessed
The mantle friction of slot 402 is fixed.Burner hole 401 is connected to 4 inside of Thermal Equipment and denitration fume extractor, each denitration fume extractor
Several burner holes 401 can be corresponded to.Flue gas in Thermal Equipment 4 enters cushion chamber through burner hole 401, and flue gas flow rate is in cushion chamber
In be buffered, so as to more equably through floater guide block 403 enter the first heat storage 201.
The technical solution of the utility model is described from structural point above, it is practical new to this below in conjunction with Fig. 1
The principle of type is further elaborated.
In Fig. 1, the lateral dimension of (a) figure and the horizontal axis of (b) figure are corresponding relationship, are followed successively by burner hole section from right to left
(401 part of burner hole of corresponding (a) figure), cushion chamber section (the buffering cavity segment of corresponding (a) figure), floater guide block section (correspond to (a) figure
403 part of floater guide block), high-temperature heat accumulation brick section 201 part of the first heat storage of (corresponding (a) figure), reduction chamber section (corresponding (a) figure
Restore 202 part of chamber), conventional gitter brick section (301 part of the second heat storage of corresponding (a) figure), catalytic thermal storage special brick section it is (right
Answer 302 part of catalytic thermal storage special brick of (a) figure) etc., (b) longitudinal axis of figure is temperature, and (b) figure is illustrated using as described above
After denitration fume extractor or regenerative combustion system, the temperature variations of flue gas, wherein the flue gas in burner hearth exists in temperature
1200-1350 DEG C of section, flue gas are slightly reduced in cushion chamber section and floater guide block section temperature；In high-temperature heat accumulation brick section temperature rapid decrease
To 850-1100 DEG C of section, and reduction chamber section is reached, temperature of the flue gas in this section is more steady；Flue gas is in conventional gitter brick section
Interior temperature rapid decrease again, temperature is 180-420 DEG C of section when reaching catalytic thermal storage special brick section, at this point, flue gas side cools down
Side carries out selective catalytic reduction reaction.Flue gas is after catalytic thermal storage special brick section, and temperature plateau is between 75-200 DEG C.
Disclosed above is only some embodiments of the application, and however, this application is not limited to this, any this field
Technical staff can think variation, should all fall in the protection domain of the application.
Claims (9)
1. a kind of denitration fume extractor, which is characterized in that fume extractor main body, SNCR denitration knot including being fixed on Thermal Equipment
Structure and SCR denitration structure；
The channel for being connected to the Thermal Equipment is equipped in the fume extractor main body, the SNCR denitration structure and the SCR are de-
Nitre structure is built in the channel；Reducing agent supply system outside the SNCR denitration structure connection；Flue gas successively passes through
It is discharged after SNCR denitration structure and SCR denitration structure.
2. denitration fume extractor as described in claim 1, which is characterized in that the SNCR denitration structure includes the first accumulation of heat
Body, reduction chamber and reductant nozzle, first heat storage are installed on one end of the close Thermal Equipment in the channel, and first
The reduction chamber is formed between heat storage and SCR denitration structure, the reductant nozzle connection reduction chamber and the reducing agent supply
To system.
3. denitration fume extractor as claimed in claim 2, which is characterized in that there are four institutes for arranged for interval in fume extractor main body
State reductant nozzle.
4. denitration fume extractor as claimed in claim 2, which is characterized in that the outer ring of the reductant nozzle is arranged with
Pipe, circulation has coolant liquid between described sleeve pipe and reductant nozzle.
5. denitration fume extractor as described in claim 1, which is characterized in that the SCR structure includes the second heat storage and urges
Change accumulation of heat special brick, second heat storage close to SNCR denitration structure setting, flue gas by the catalytic thermal storage special brick into
It is discharged after row SCR denitration reaction.
6. denitration fume extractor as described in claim 1, which is characterized in that the fume extractor main body is heat-accumulating burner sheet
Body.
7. denitration fume extractor as claimed in claim 6, which is characterized in that control the reversal valve of the regenerative burner body
It links and is arranged with the control section of reducing agent supply system output reducing agent.
8. a kind of regenerative combustion system, which is characterized in that the burner of regenerative combustion system is used as claim 1-7 is any
Denitration fume extractor described in.
9. regenerative combustion system as claimed in claim 8, which is characterized in that Thermal Equipment includes groove and burner hole；Institute
State and be equipped in groove to the locating piece that positions denitration fume extractor, groove formed between the locating piece and burner hole to
Buffer the breeze way of flue gas flow rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013061.XU CN209541454U (en) | 2019-01-04 | 2019-01-04 | A kind of denitration fume extractor and regenerative combustion system |
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| CN201920013061.XU CN209541454U (en) | 2019-01-04 | 2019-01-04 | A kind of denitration fume extractor and regenerative combustion system |
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| CN209541454U true CN209541454U (en) | 2019-10-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916185A (en) * | 2019-01-04 | 2019-06-21 | 上海轩鼎冶金科技有限公司 | A kind of denitration fume extractor and regenerative combustion system |
| CN112161270A (en) * | 2020-07-09 | 2021-01-01 | 河北和和能源科技有限公司 | Heat accumulating type low-nitrogen burner |
-
2019
- 2019-01-04 CN CN201920013061.XU patent/CN209541454U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916185A (en) * | 2019-01-04 | 2019-06-21 | 上海轩鼎冶金科技有限公司 | A kind of denitration fume extractor and regenerative combustion system |
| CN109916185B (en) * | 2019-01-04 | 2024-09-13 | 上海轩鼎冶金科技有限公司 | Denitration fume extractor and heat accumulation formula combustion system |
| CN112161270A (en) * | 2020-07-09 | 2021-01-01 | 河北和和能源科技有限公司 | Heat accumulating type low-nitrogen burner |
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