CN208642683U - A kind of regenerating unit of the carbon base catalyst suitable for flue gas purification system - Google Patents
A kind of regenerating unit of the carbon base catalyst suitable for flue gas purification system Download PDFInfo
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- CN208642683U CN208642683U CN201821281927.7U CN201821281927U CN208642683U CN 208642683 U CN208642683 U CN 208642683U CN 201821281927 U CN201821281927 U CN 201821281927U CN 208642683 U CN208642683 U CN 208642683U
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- ammonia
- regenerator
- inert gas
- gas
- injection pipe
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- 239000003054 catalyst Substances 0.000 title claims abstract description 69
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 55
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 26
- 239000003546 flue gas Substances 0.000 title claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 238000000746 purification Methods 0.000 title claims abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 140
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 67
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 239000011261 inert gas Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims description 38
- 238000001816 cooling Methods 0.000 claims description 13
- 239000003610 charcoal Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000000112 cooling gas Substances 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 abstract description 14
- 238000011069 regeneration method Methods 0.000 abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 6
- 230000023556 desulfurization Effects 0.000 description 6
- 230000008439 repair process Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009719 regenerative response Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical group [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The regenerating unit of the utility model discloses a kind of suitable for flue gas purification system carbon base catalyst, using regenerator, regenerator is equipped with ammonia inlet, is connected with the inside of regenerator；Ammonia inlet is located above the bringing-up section of regenerator or ammonia inlet is inert gas first entrance；Regenerating unit further includes ammonia injection pipe, the first inert gas injection pipe and the second inert gas injection pipe；Ammonia injection pipe both ends are separately connected ammonia inlet and ammonia source；Ammonia injection pipe is equipped with valve and flow control meter；First inert gas injection pipe and the second inert gas injection pipe are connected with inert gas first entrance and inert gas second entrance respectively, are equipped with valve and flow control meter thereon.The utility model is passed through the regeneration that ammonia carries out carbon base catalyst by ammonia inlet simultaneously in regenerator, improves the regenerability of carbon base catalyst.
Description
Technical field
The utility model is in field of environment engineering, and in particular to the charcoal of adsorption saturation in flue gas desulfurization and denitrification processing system
The regenerating unit of base catalyst.
Background technique
Carbon base catalyst flue gas desulfurization and denitrification technical principle are as follows: flue gas under the absorption and catalytic action of carbon base catalyst,
SO in flue gas2Carbon base catalyst surface is adsorbed in the form of physical absorption and chemisorption respectively；It is urged simultaneously using charcoal base
The catalytic performance of agent, NO in flue gasxIt has catalytic reduction reaction with ammonia gas and generates N2, realize the desulphurization denitration of flue gas.Desulfurization
Carbon base catalyst after denitration is adsorbed with a large amount of SO2, sulfuric acid and in denitrification process because be passed through ammonia generation ammonium salt, this
A little substances reduce the activity of catalyst, it is therefore necessary to regenerate to active char catalyst is reduced, make desulphurization denitration mistake
The substance parsing adsorbed in journey, to improve the performance of catalyst.Catalyst after regeneration is through the conveying equipments weight such as conveyer
It is new to return in adsorbent equipment, realize recycling for carbon base catalyst.The gas that catalyst regeneration parses can be de- with desulfurization
The form of nitre by-product carries out economic utilization.
According to carbon base catalyst sweetening process common reactant:
It is adsorbed after generating sulfuric acid: SO2+1/2O2+H2O→H2SO4*
SO3+H2O→H2SO4*
It is adsorbed after generating ammonium sulfate: H2SO4*+NH3→NH4HSO4*
NH4HSO4*+NH3→(NH4)2SO4*
Wherein * is indicated: being adsorbed by carbon base catalyst
Carbon base catalyst regenerative response after adsorbing sulphur:
H2SO4*+1/2C→SO2+1/2CO2+H2O
NH4HSO4*→SO2+1/3N2 +1/3NH3+2 H2O during the regeneration of the catalyst, join by the carbon in carbon base catalyst
With SO2Resolving reaction, from reaction process as can be seen that catalyst is constantly consumed in the form of chemical wear, because
And inevitably increase loss of the catalyst in smoke processing system operational process.
Meanwhile carbon base catalyst in denitrification process other than as catalyst, also participate in following reaction:
NO+NHxO-AC→N2+H2O+OH-AC
As can be seen that oxygen nitrogen functional group is also the important catalytic activity point of denitration reaction, denitration reaction reduces charcoal base and urges
The active group of agent, the active group after reaction can not be if effective regeneration, and carbon base catalyst activity will gradually reduce.
In addition, during combined desulfurization and denitration, due to SO2Presence, the denitration performance of carbon base catalyst is substantially reduced, therefore, has
Effect improves the performance of regenerated catalyst with regard to particularly important.
In existing regenerator technical solution (such as Chinese patent: 107,510,218 107537591 A of A, CN of CN), mainly
Catalyst is regenerated by heating method, inert gas such as N is used in regenerative process2Gas will be solved as protection gas
Gassing body carrying device.Such design is disadvantageous in that: although 1) can be realized the parsing of Catalyst Adsorption substance and divide
From, but since the carbon in carbon base catalyst takes part in SO2Resolving reaction, result in the increase of catalyst consumption；2) due to
The active group of catalyst gradually decreases in denitrification process, might not be only able to achieve in catalyst by heating method living
The effective regeneration of property group.
Summary of the invention
Purpose of the utility model is to solve defects existing in the prior art, and charcoal can be effectively improved by providing one kind
The device of base catalyst regeneration performance.
In order to achieve the above object, the utility model provides a kind of carbon base catalyst suitable for flue gas purification system
Regenerating unit, the regenerating unit use regenerator, and the regenerator is divided into bringing-up section, changeover portion and cooling section；The pipe of regenerator
Journey part, top are equipped with carbon base catalyst entrance, and bottom is exported equipped with carbon base catalyst, and changeover portion is equipped with parsing gas vent,
Above bringing-up section and below cooling section, it is respectively equipped with inert gas first entrance and inert gas second entrance；The shell of regenerator
Journey part, heating pars infrasegmentalis are equipped with heating gas inlet, and top is exported equipped with heat gas, and cooling pars infrasegmentalis is equipped with cooling gas
Entrance, top are exported equipped with cooling gas；Ammonia inlet is additionally provided on the utility model regenerator, in the regenerator
Portion is connected；The ammonia inlet is located above the bringing-up section of regenerator or the ammonia inlet is the indifferent gas
Body first entrance；The regenerating unit further includes ammonia injection pipe, the first inert gas injection pipe and the injection of the second inert gas
Pipe；Ammonia injection pipe both ends are separately connected the ammonia inlet and ammonia source；The ammonia injection pipe is equipped with valve
And flow control meter；The first inert gas injection pipe and the second inert gas injection pipe respectively with inert gas first entrance
It is connected with inert gas second entrance, is equipped with valve and flow control meter thereon.
Further, preheating section is additionally provided with above the bringing-up section of regenerator；The ammonia inlet is located at the preheating section
Between bringing-up section or the ammonia inlet is the inert gas first entrance and is located above the preheating section.
Further, regenerating unit further includes ammonia even distribution device；The ammonia even distribution device is injected set on the ammonia
At mouthful.
Further, the carbon base catalyst entrance of regenerator and carbon base catalyst exit are respectively equipped with duplex blocking valve.
Further, ammonia even distribution device includes connecting flange, Guan Zhen, gas pipeline, device housing and tube sheet；Tube sheet is solid
Surely it is set in device housing；Guan Zhen is using in staggered manner arrangement tube sheet；Gas pipeline be it is multiple, be arranged in parallel in device housing
On, one end is connected with corresponding connecting flange, and one end is connected with the Guan Zhen on tube sheet；Ammonia even distribution device passes through connecting flange
It is fixed on regenerator.Gas pipeline spacing takes 500mm, and bore takes 15 ~ 25mm.Tube plate thickness is about gas pipeline spacing
0.25 ~ 3 times, preferably 1 times.Ammonia is entered in ammonia even distribution device by gas pipeline.Formed Guan Zhen bore be not less than
70mm, preferably 75 ~ 90mm, tube center distance are about 1.5 times of calibers.
The utility model has the advantage that compared with prior art
The regeneration that the utility model carries out carbon base catalyst by being passed through ammonia simultaneously in regenerator, can be joined using ammonia
With the regeneration of absorption sulfuric acid, the carbon consumption in carbon base catalyst regenerative process can be effectively reduced, while can make the charcoal after regeneration
Base catalyst generates more active groups and improves it to further be activated to carbon base catalyst and take off to pollutant
Removing solid capacity.It is controlled simultaneously using ammonia and nitrogen flow of the flow control meter to injection, realizes flue gas desulfurization and denitrification processing
The economical and efficient of system is run.
Detailed description of the invention
Fig. 1 is a kind of regenerating unit of the carbon base catalyst suitable for flue gas purification system in the utility model embodiment 1
Structural schematic diagram；
Fig. 2 is another structural schematic diagram of regenerating unit in the utility model embodiment 2；
Fig. 3 is the structural schematic diagram of ammonia even distribution device in Fig. 1；
Fig. 4 is the pipe battle array distribution schematic diagram of ammonia even distribution device in Fig. 3.
In figure, 1- preheating section, 2- bringing-up section, 3- changeover portion, 4- cooling section, 5- duplex blocking valve, 6- ammonia even distribution device,
7- connecting flange, 8- pipe battle array, 9- device housing, 10- tube sheet, 11- gas pipeline.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1, the regenerating unit of the utility model carbon base catalyst suitable for flue gas purification system is using existing
Regenerator improve.Existing regenerator is divided into preheating section 1, bringing-up section 2, changeover portion 3, cooling section 4 from top to bottom.Absorption
The carbon base catalyst of saturation prevents the gas exchanges inside and outside device by the duplex blocking valve 5(on top) enter in regenerator, warp
Preheating section 1 realizes preheating, and wherein preheating section 1 is pipe shell type heat exchange structure, and wherein carbon base catalyst walks tube side, and preheating gas walks shell
The exit gas of cooling section 4 can be used in journey, preheating gas.Carbon base catalyst is realized for heated section 2 again is warming up to regeneration temperature, leads to
400-450 DEG C is often taken, bringing-up section uses pipe shell type heat exchange structure, and wherein carbon base catalyst walks tube side, and heat gas walks shell side, adds
The high-temperature flue gas that the hot-air after electric heating or hot-blast stove generate can be used in hot gas.Carbon base catalyst after regeneration is through transition
Section 3(flat-temperature zone), the parsing gas (SRG) generated in regenerative process is discharged from the SRG gas vent of changeover portion 3.The catalysis of charcoal base
Agent enters back into cooling after cooling section 4 is regenerated, and cooling section 4 also uses pipe shell type heat exchange structure, and carbon base catalyst walks tube side, cold
But gas walks shell side, and cooling gas uses air.Carbon base catalyst after cooling is arranged through duplex blocking valve 5 from regeneration tower bottom
Out.Inert gas (generalling use nitrogen) inlet, the inertia of injection is respectively set in the inlet and exit of regenerator simultaneously
Gas can protect carbon base catalyst and reduce scaling loss in heating regenerative process and prevent from catching fire as protection gas, and as fortune
The parsing gas discharged in regenerative process is discharged gas carrier.
It is uniformly distributed that ammonia is arranged in the utility model regenerating unit before the lower part of the preheating section 1 of regenerator, the entrance of bringing-up section 2
Device 6 after ammonia is injected by ammonia even distribution device, is walked in tube side injection regenerator, bringing-up section 2 is entered after sufficiently spreading,
It flows downward jointly with carbon base catalyst, participates in the regenerative process of carbon base catalyst.
According to one of the regenerative response of sulfuric acid:
H2SO4*+NH3→NH4HSO4*
NH4HSO4*→SO2+1/3N2 +1/3NH3+2 H2O
The sulfuric acid of absorption is reacted with the ammonia of injection generates NH4HSO4, NH4HSO4It can directly be regenerated, without consumption
Carbon reduces the carbon consumption in carbon base catalyst regenerative process, to reduce the consumption of carbon base catalyst.
In addition, the carbon base catalyst regenerative response in regenerator further include:
SO3+C※→2SO2+O-C※
NH3+O-C※→N2+OH-C
NH3+O-C※→H2O+N-O-C※
Wherein, ※ indicates the carbon in carbon base catalyst.
As can be seen that the ammonia of injection can effectively facilitate nitrogen in carbon base catalyst after entering regenerating unit bringing-up section
The generation of oxygen functional group, the carbon base catalyst after making regeneration have more denitration catalyst active sites, urge to realize charcoal base
The progress of agent further activates, and improves it to NOxRemoving ability.
As shown in figure 3, ammonia even distribution device 6 includes connecting flange 7, Guan Zhen 8, gas pipeline 11, device housing 9 and tube sheet
10.Gas pipeline more than 8, in device housing 9, one end is connected parallel arrangement with corresponding connecting flange 7, one end and tube sheet 10
On Guan Zhen be connected.Ammonia even distribution device 6 is fixed on regenerator by connecting flange 7.8 spacing of gas pipeline takes 500mm,
Bore takes 15 ~ 25mm.10 thickness of tube sheet is about 0.25 ~ 3 times of 8 spacing of gas pipeline, preferably 1 times.Ammonia passes through flue
Road 11 enters in ammonia even distribution device 6.Tube sheet 10 is fixed in device housing.Guan Zhen arranges tube sheet 10 using staggered manner
In, the bore for forming Guan Zhen is not less than 70mm, preferably 75 ~ 90mm, and tube center distance is about 1.5 times of calibers.
In order to which preferably the injection rate of nitrogen is adjusted, the utility model passes through ammonia injection pipe (not shown) and ammonia
Gas even distribution device 6 is connected, and valve and flow control meter are equipped on ammonia injection pipe, carries out the on-off and flow tune of ammonia injection
Section.Inject inert gas into the inlet and exit of regenerator by inert gas injection pipe respectively simultaneously, inlet with
It is respectively provided with valve and flow control meter on the inert gas injection pipe in exit, carries out the on-off and flow tune of injection nitrogen up and down
Section.
Embodiment 2
As shown in Fig. 2, with embodiment 1, difference is the structure of regenerating unit in the present embodiment, ammonia even distribution device 6 is
At the inert gas inlet of regenerator inlet, ammonia reinjects in regenerating unit after mixing with nitrogen.Ammonia and nitrogen
Gas passes through ammonia injection pipe respectively and nitrogen injection pipe is connected to after being mixed in filling main and is injected by ammonia even distribution device 6
In regenerator.The gas being passed through carries out the logical of injection gas by the valve and flow control meter that are arranged on respective injection pipe
Disconnected and flow is adjusted.
The utility model regenerating unit can also be not provided with preheating section 1, and the ammonia injected at this time is directly entered the participation of bringing-up section 2
The regenerative response of carbon base catalyst.
Claims (5)
1. a kind of regenerating unit of the carbon base catalyst suitable for flue gas purification system, the regenerating unit uses regenerator, institute
It states regenerator and is divided into bringing-up section, changeover portion and cooling section；The tube side part of regenerator, top are equipped with carbon base catalyst entrance, bottom
Portion is exported equipped with carbon base catalyst, and changeover portion is equipped with parsing gas vent, and bringing-up section top is respectively equipped with lazy with below cooling section
Property gas first entrance and inert gas second entrance；The shell side part of regenerator, heating pars infrasegmentalis are equipped with heating gas inlet,
Top is exported equipped with heat gas, and cooling pars infrasegmentalis is equipped with cooling gas inlet, and top is exported equipped with cooling gas；Its feature exists
In: it is additionally provided with ammonia inlet on the regenerator, is connected with the inside of the regenerator；The ammonia inlet is located at again
Above the bringing-up section of raw tower or the ammonia inlet is the inert gas first entrance；The regenerating unit further includes
Ammonia injection pipe, the first inert gas injection pipe and the second inert gas injection pipe；Ammonia injection pipe both ends are separately connected
The ammonia inlet and ammonia source；The ammonia injection pipe is equipped with valve and flow control meter；First inert gas
Injection pipe and the second inert gas injection pipe are connected with inert gas first entrance and inert gas second entrance respectively, thereon
Equipped with valve and flow control meter.
2. regenerating unit according to claim 1, it is characterised in that: be additionally provided with preheating above the bringing-up section of the regenerator
Section；The ammonia inlet is between the preheating section and bringing-up section or the ammonia inlet is the inert gas
First entrance and it is located above the preheating section.
3. regenerating unit according to claim 2, it is characterised in that: the regenerating unit further includes ammonia even distribution device；
The ammonia even distribution device is set at the ammonia inlet.
4. regenerating unit according to claim 3, it is characterised in that: the carbon base catalyst entrance and charcoal base of the regenerator
Duplex blocking valve is respectively equipped at catalyst outlet.
5. regenerating unit according to claim 4, it is characterised in that: the ammonia even distribution device includes connecting flange, pipe
Battle array, gas pipeline, device housing and tube sheet；Tube sheet is fixed in device housing；Guan Zhen is using in staggered manner arrangement tube sheet；
Gas pipeline be it is multiple, in device housing, one end is connected parallel arrangement with corresponding connecting flange, the pipe on one end and tube sheet
Battle array is connected；Ammonia even distribution device is fixed on regenerator by connecting flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821281927.7U CN208642683U (en) | 2018-08-09 | 2018-08-09 | A kind of regenerating unit of the carbon base catalyst suitable for flue gas purification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821281927.7U CN208642683U (en) | 2018-08-09 | 2018-08-09 | A kind of regenerating unit of the carbon base catalyst suitable for flue gas purification system |
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| Publication Number | Publication Date |
|---|---|
| CN208642683U true CN208642683U (en) | 2019-03-26 |
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ID=65788908
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821281927.7U Active CN208642683U (en) | 2018-08-09 | 2018-08-09 | A kind of regenerating unit of the carbon base catalyst suitable for flue gas purification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038646A (en) * | 2019-05-30 | 2019-07-23 | 国电环境保护研究院有限公司 | A kind of carbon base catalyst regenerating unit and technique |
-
2018
- 2018-08-09 CN CN201821281927.7U patent/CN208642683U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038646A (en) * | 2019-05-30 | 2019-07-23 | 国电环境保护研究院有限公司 | A kind of carbon base catalyst regenerating unit and technique |
| CN110038646B (en) * | 2019-05-30 | 2024-01-26 | 国电环境保护研究院有限公司 | Carbon-based catalyst regeneration device and process |
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