CN113522372A - Thermal regeneration device and method for ammonium bisulfate poisoned denitration catalyst - Google Patents
Thermal regeneration device and method for ammonium bisulfate poisoned denitration catalyst Download PDFInfo
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- CN113522372A CN113522372A CN202110817241.5A CN202110817241A CN113522372A CN 113522372 A CN113522372 A CN 113522372A CN 202110817241 A CN202110817241 A CN 202110817241A CN 113522372 A CN113522372 A CN 113522372A
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- 238000011069 regeneration method Methods 0.000 title claims abstract description 375
- 230000008929 regeneration Effects 0.000 title claims abstract description 370
- 239000003054 catalyst Substances 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims abstract description 28
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 title claims description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 229
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 231100000572 poisoning Toxicity 0.000 claims description 12
- 230000000607 poisoning effect Effects 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 11
- 230000001172 regenerating effect Effects 0.000 claims description 11
- 238000010410 dusting Methods 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 5
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- 239000002956 ash Substances 0.000 description 12
- 239000003546 flue gas Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 239000003570 air Substances 0.000 description 10
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 6
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 6
- 235000011130 ammonium sulphate Nutrition 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/02—Heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/04—Gas or vapour treating; Treating by using liquids vaporisable upon contacting spent catalyst
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
本发明涉及一种硫酸氢铵中毒脱硝催化剂的热再生装置及方法，装置包括供送单元、第一热再生反应单元、第二热再生反应单元、氨浓度检测单元、驱动单元，第一热再生反应单元用于与热再生介质供送单元连通，第一热再生反应单元的出口端、第二热再生反应单元的进口端分别用于伸入反应器内与同一个催化剂模块的进口、出口相连接；驱动单元用于驱动第一热再生反应单元、第二热再生反应单元在反应器内移动，使第一热再生反应单元、第二热再生反应单元分别与不同催化剂模块的进口、出口连接。本发明通过便于移动的第一热再生反应单元、第二热再生反应单元，实现对整个脱硝反应器内所有催化剂模块热再生，提高再生工作的效率和安全性。
The invention relates to a thermal regeneration device and method for a denitration catalyst poisoned by ammonium hydrogen sulfate. The device comprises a supply unit, a first thermal regeneration reaction unit, a second thermal regeneration reaction unit, an ammonia concentration detection unit, a driving unit, and a first thermal regeneration unit. The reaction unit is used to communicate with the heat regeneration medium supply unit, and the outlet end of the first heat regeneration reaction unit and the inlet end of the second heat regeneration reaction unit are respectively used to extend into the reactor to be in phase with the inlet and outlet of the same catalyst module. connection; the driving unit is used to drive the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to move in the reactor, so that the first thermal regeneration reaction unit and the second thermal regeneration reaction unit are respectively connected with the inlet and outlet of different catalyst modules . The invention realizes thermal regeneration of all catalyst modules in the entire denitration reactor through the first thermal regeneration reaction unit and the second thermal regeneration reaction unit which are easy to move, and improves the efficiency and safety of regeneration work.
Description
Technical Field
The invention belongs to the field of catalyst thermal regeneration, and particularly relates to a thermal regeneration device and method for an ammonium bisulfate poisoning denitration catalyst.
Background
A waste incineration power plant can generate a large amount of NOx in the production process, and the SNCR and SCR flue gas denitration process is a main mode for treating NOx in the waste incineration power plant. With the continuous tightening of NOx emission standards, the single SNCR mode cannot meet the requirements, and the SCR denitration process is adopted by more and more garbage power plants as a supplement. The catalyst is the core of the SCR denitration device, in a garbage power plant, the temperature of the region where the SCR denitration device is arranged is 180-240 ℃, and SO in flue gas is generated in the temperature range3、H2O and a reducing agent NH3Ammonium Bisulfate (ABS) generated by the combined action can be adsorbed on the surface of the catalyst, covers the pore channel and the active site of the catalyst to cause poisoning, reduces the activity of the catalyst, has the phenomena of reduction of denitration efficiency, increase of consumption of a reducing agent and increase of escape concentration of ammonia, and even influences environmental-friendly emission and safe operation of a unit. The catalyst activity is usually recovered by a thermal regeneration method, and the specific thermal regeneration reaction operation is as follows: the method adopts a chain type kiln with larger volume, firstly, catalyst modules are disassembled one by one in an SCR catalyst reactor, then the catalyst modules are moved out of the SCR catalyst reactor and transported into the kiln, after the kiln finishes thermal regeneration reaction, all the catalyst modules are moved into the SCR catalyst reactor, when the catalyst modules are assembled in the SCR catalyst reactor, because a single catalyst module is large in volume (such as 1.9 meters in length, 1 meter in width and 1 meter in height), the operations of disassembling, assembling, hoisting and the like of the modules with extremely high danger coefficients exist when the catalyst modules are disassembled and assembled, and the time and the labor are wasted. But because of the lower operating temperature of garbage power plant, ABS poisoning cycle is shorter, and thermal regeneration is frequent, module dismouting work and the safe risk greatly increased that bring from this.
Considering that the SCR catalyst module of the garbage power plant is less, the module size is basically unified, the thermal regeneration consumes less time and the like, if a mobile intelligent thermal regeneration device suitable for the SCR denitration catalyst ammonium bisulfate poisoning of the garbage power plant is developed, the module disassembly and assembly work can be avoided, the efficiency and the safety of the regeneration work are greatly improved, and the method is very urgent and necessary.
Although there are thermal regeneration reaction operations without disassembling the catalyst module, there are still many problems, such as the following three technical solutions disclosed in the chinese patent documents:
chinese patent document CN105688936A discloses an in-situ regeneration method of ammonium sulfate poisoned denitration catalyst. When the concentration of nitric oxide in the flue gas at the outlet of the main reactor is close to the emission limit value, the flue gas is switched to the standby reactor, then hot gas flow is introduced into the main reactor, an ammonium sulfate layer deposited on the surface of the denitration catalyst is decomposed under the action of the hot gas flow to complete the regeneration of the denitration catalyst, and then the flue gas is switched back to the main reactor to continue the denitration reaction. This scheme needs a main reactor and spare reactor, adds spare reactor, realizes switching regeneration and the online discharge to reach standard of SCR denitration catalyst, but adds a reactor alone and then need increase the catalyst that corresponds the volume, and a reactor is with high costs, sets up two reactor greatly increased economic cost, and economic nature shortcoming is obvious, and is impractical. Meanwhile, a timely and reliable method is lacked for technical judgment of regeneration completion, and certain technical defects exist.
Chinese patent document CN106237848B discloses a continuously regenerative low-temperature SCR denitration catalytic denitration device. The device has redesigned SCR denitration reactor, and the whole appearance of reactor is circular, including catalyst main part unit, set up both ends respectively and can carry out intermittent rotation's first rotatory air valve unit and second rotatory air valve unit, carry the forced draught blower and the regeneration air current heater with catalyst main part unit cooperation use in catalyst main part unit about the catalyst main part unit sets up, catalyst main part unit keeps apart low temperature SCR reaction zone, catalyst regeneration preheating zone and heat regeneration district in the circumferencial direction. The scheme utilizes the rotary bellows capable of continuously rotating and three partitions inside the rotary bellows, and realizes continuous supply of hot regeneration airflow through the electric heater and the conveying fan so as to meet the requirement of catalyst regeneration in a single partition. But this scheme needs redesign to existing SCR reactor, because single catalyst module is square, needs the redesign to the type and the arrangement mode of catalyst simultaneously, belongs to non-standardized product, adds rotatory bellows and has increased system resistance again, and the energy consumption rises, and universality and economic nature shortcoming are obvious. Meanwhile, a timely and reliable method is lacked for technical judgment of regeneration completion, and certain technical defects exist.
Chinese patent document CN107890884A discloses an SCR catalyst in-situ regeneration device applied to household garbage incineration. A set of methane generation (using garbage percolate as a methane source through ozone fermentation) and incineration system are added to generate regenerated hot flue gas, the temperature in the SCR reactor is raised to about 350 ℃ by using the regenerated hot flue gas, NH4HSO4 on the surface of the catalyst is removed, and the activity of the catalyst is recovered. And a wet deacidification tower is used for removing SOx and NH3 in the regenerated flue gas, so that the flue gas reaches the standard during regeneration. But this scheme needs to add a set of marsh gas production and system of burning alone, and the investment is huge, and the while regeneration hot flue gas directly mixes with the former flue gas of system, has all proposed higher technical requirement and the actual operation degree of difficulty to water conservancy diversion, flow equalizing etc. and economic nature and convenience shortcoming are obvious. Meanwhile, a timely and reliable method is lacked for technical judgment of regeneration completion, and certain technical defects exist.
Disclosure of Invention
The invention aims to provide a thermal regeneration device and a thermal regeneration method for an ammonium bisulfate poisoning denitration catalyst, which do not need to redesign the existing SCR catalyst reactor, realize automatic intelligent regeneration and greatly improve the efficiency and safety of regeneration work.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a thermal regeneration device of a denitration catalyst poisoned by ammonium bisulfate, which comprises the following components:
a heat regeneration medium supply unit for supplying a heat regeneration medium;
the device comprises a first thermal regeneration reaction unit and a second thermal regeneration reaction unit, wherein the first thermal regeneration reaction unit and the second thermal regeneration reaction unit are independent from each other and are respectively provided with a chamber for heat regeneration medium circulation, the chamber is provided with an inlet end and an outlet end, the inlet end of the first thermal regeneration reaction unit is communicated with a heat regeneration medium supply unit, and the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit are respectively used for extending into an SCR catalyst reactor and are connected with the inlet and the outlet of the same catalyst module;
the ammonia concentration detection unit is used for detecting the ammonia concentration of the tail gas in the second thermal regeneration reaction unit;
and the driving unit is used for driving the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to move in the SCR catalyst reactor, so that the first thermal regeneration reaction unit and the second thermal regeneration reaction unit are respectively connected with inlets and outlets of different catalyst modules.
Preferably, the driving unit includes a first guide rail, a second guide rail, a first moving switching component, and a second moving switching component, the first guide rail and the second guide rail are respectively located at an inlet side and an outlet side of the catalyst module, the first moving switching component is movably disposed on the first guide rail, the first thermal regeneration reaction unit is connected with the first moving switching component, and the first moving switching unit moves along the first guide rail to drive the first thermal regeneration reaction unit to move to correspond to different catalyst modules; the second movable switching component is movably arranged on the second guide rail, the second heat regeneration reaction unit is connected with the second movable switching component, and the second movable switching unit moves along the second guide rail to drive the second heat regeneration reaction unit to move so as to correspond to different catalyst modules.
Preferably, the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit are both provided with a sealing member, and the sealing members are used for hermetically connecting the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit with the inlet and the outlet of the same catalyst module respectively.
Preferably, an electromagnetic coil is arranged in the sealing component, and when the electromagnetic coil is electrified to generate magnetic attraction, the outlet end of the first heat regeneration reaction unit and the inlet end of the second heat regeneration reaction unit are connected with the inlet and the outlet of the catalyst module in an adsorption manner; when the electromagnetic coil is powered off, the outlet end of the first heat regeneration reaction unit and the inlet end of the second heat regeneration reaction unit are separated from the inlet and the outlet of the catalyst module.
Preferably, the driving unit further includes a controller, and the controller is configured to control the first movable switching component and the second movable switching component to move to positions corresponding to the catalyst modules, and control the sealing member to hermetically connect the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit with the inlet and the outlet of the same catalyst module.
Preferably, the first moving switching assembly and the second moving switching assembly comprise a moving housing, a moving member connected to the moving housing, a first driving motor, a lifting shaft assembly connected to the housing, and a second driving motor, the moving member is disposed on the first guide rail and the second guide rail, the first driving motor is used for driving the moving member to move along the first guide rail and the second guide rail,
one end of the lifting shaft assembly is connected with the shell, the other end of the lifting shaft assembly is used for being connected with the outlet end of the first heat regeneration reaction unit and the inlet end of the second heat regeneration reaction unit, and the second driving motor is used for driving the lifting shaft assembly to stretch.
Preferably, the heat regeneration medium supply unit comprises a medium conveying pipeline, a heating unit and a tail gas discharge pipeline, and the inlet end of the first heat regeneration reaction unit is communicated with the medium conveying pipeline; the heating unit is arranged between the medium conveying pipeline and the first heat regeneration reaction unit and is used for heating a regeneration medium; the outlet end of the second heat regeneration reaction unit is communicated with the tail gas discharge pipeline.
Preferably, the device still include separation dusting unit, tail gas absorption unit, separation dusting unit, tail gas absorption unit set up the second thermal regeneration reaction unit with the tail gas discharge pipeline between, the separation dusting device be used for retrieving the dust that produces after the thermal regeneration reaction, tail gas absorption unit be used for collecting the tail gas after the thermal regeneration reaction.
Preferably, the heat regeneration medium supply unit further comprises a circulation pipeline, the circulation pipeline is communicated with the medium conveying pipeline and the tail gas discharge pipeline, and a circulation valve is arranged on the circulation pipeline.
It is another object of the present invention to provide a method for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method adopts the thermal regeneration device of the ammonium bisulfate poisoning denitration catalyst, and comprises the following steps:
s1, determining a catalyst module needing thermal regeneration;
s2, moving the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to the position of a catalyst module needing thermal regeneration, respectively connecting the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit with the inlet and the outlet of the catalyst module, and introducing a thermal regeneration medium to carry out thermal regeneration reaction;
and S3, judging that the thermal regeneration is finished when the concentration of the ammonia at the outlet of the second thermal regeneration reaction unit reaches a preset ammonia concentration threshold value, and separating the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit from the inlet and the outlet of the catalyst module.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the invention, through the first thermal regeneration reaction unit and the second thermal regeneration reaction unit which are relatively independent and convenient to move, thermal regeneration of all catalyst modules in the whole SCR denitration reactor is realized, the device is convenient to disassemble, assemble and install, the existing SCR catalyst reactor is not required to be redesigned, the catalyst modules are not required to be disassembled and assembled, automatic and intelligent regeneration is realized, and the efficiency and safety of regeneration work are greatly improved; whether the regeneration reaction is completed or not is evaluated by the ammonia concentration detection unit, the method is reliable and effective, and energy conservation and efficiency improvement are realized by arranging a circulating pipeline; the universality is strong, the economy is good, the heating time can be intelligently controlled, and the energy waste is reduced.
Drawings
FIG. 1 is an overall schematic diagram of a thermal regeneration apparatus;
FIG. 2 is a schematic view of a thermal regeneration unit with a seal member attached to the inlet of a catalyst module;
fig. 3 is a schematic structural diagram of the first mobile switching module and the second mobile switching module.
In the above drawings:
1-a first heat regeneration reaction unit, 11-an outlet end of the first heat regeneration reaction unit, 2-a second heat regeneration reaction unit, 21-an inlet end of the second heat regeneration reaction unit, 30-a controller, 31-a first guide rail, 32-a second guide rail, 33-a first moving switching component, 34-a second moving switching component, 35-a moving shell, 36-a moving component, 37-a second connecting component, 38-an outer sleeve, 39-an inner sleeve, 40-a first connecting component, 4-a sealing component, 5-a medium conveying pipeline, 6-a heating unit, 7-an ammonia concentration detection unit, 8-a tail gas discharge pipeline, 9-a separation ash removal unit, 10-a tail gas absorption unit, 11-a circulation pipeline and 12-a circulation valve, 13-an air inlet valve, 14-an exhaust valve, 15-an induced draft fan, 16-an SCR catalyst reactor, 161-an opening, 17-a catalyst module, 18-a guide plate and 19-a temperature measuring unit.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.
Referring to fig. 1 to 3, the thermal regeneration device for the ammonium bisulfate poisoning denitration catalyst comprises a thermal regeneration medium supply unit, a first thermal regeneration reaction unit 1, a second thermal regeneration reaction unit 2 and an ammonia concentration detection unit 7, wherein the thermal regeneration medium supply unit is used for supplying a thermal regeneration medium, the thermal regeneration medium is air, nitrogen and argon, the temperature of the thermal regeneration medium is 300-500 ℃, the thermal regeneration medium is free from pollution to the environment, and the environmental protection safety is met.
The specific structures of the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 are as follows: the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 are independent from each other, both the two thermal regeneration reaction units are provided with chambers for supplying heat and regeneration medium to circulate, each chamber is provided with an inlet end and an outlet end, the inlet end of the first thermal regeneration reaction unit 1 is communicated with a thermal regeneration medium supply unit, and the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 are respectively used for extending into the SCR catalyst reactor 16 to be connected with the inlet and the outlet of the same catalyst module 17. After the thermal regeneration medium is introduced into the first thermal regeneration reaction unit 1, the thermal regeneration medium sequentially passes through the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet and the outlet of the same catalyst module 17, so that the ammonium sulfate layer deposited on the surface of the catalyst module is decomposed under the action of the thermal regeneration medium (hot air flow) to complete the regeneration of the denitration catalyst, and the tail gas after the thermal regeneration reaction is discharged through the outlet end of the second thermal regeneration reaction unit 2.
The manhole door (door that people can let in) of enough size has been seted up outward to current SCR catalyst reactor 16, when using, the exit end 11 of first heat regeneration reaction unit 1, the entrance point 21 of second heat regeneration reaction unit 2 stretches into two manhole doors outside current SCR catalyst reactor 16 respectively, need not to redesign current SCR catalyst reactor 16, it is in order to carry out the catalyst dismouting still to need not to cut SCR catalyst reactor 16, high module dismouting, work such as hoist and mount of danger coefficient have not only been avoided, the security is greatly improved, and the cost has been practiced thrift.
In order to facilitate the thermal regeneration reaction of all the catalyst modules in the SCR catalyst reactor 16, the driving unit of the thermal regeneration device can drive the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 to move (move up and down and left and right) in the SCR catalyst reactor 16, so that the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 are respectively connected with the inlet and the outlet of different catalyst modules 17, that is, after the thermal regeneration reaction of one catalyst module 17 is finished, the driving unit drives the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 to move to the next catalyst module 17, and the thermal regeneration reaction of all the catalyst modules 17 in the SCR catalyst reactor 16 can be performed.
The specific structure of the drive unit is as follows: the device comprises a first guide rail 31, a second guide rail 32, a first movable switching assembly 33 and a second movable switching assembly 34, wherein the first guide rail 31 and the second guide rail 32 are respectively positioned at the inlet side and the outlet side of the catalyst module 17, and the first guide rail 31 and the second guide rail 32 are preferably fixedly arranged in the SCR catalyst reactor 16.
The first movable switching component 33 is movably arranged on the first guide rail 31, the first thermal regeneration reaction unit 1 is connected with the first movable switching component 33, and the first movable switching unit moves along the first guide rail 31 to drive the first thermal regeneration reaction unit 1 to move so as to correspond to different catalyst modules 17; the second moving switching component 34 is movably disposed on the second guide rail 32, the second thermal regeneration reaction unit 2 is connected to the second moving switching component 34, and the second moving switching unit moves along the second guide rail 32 to drive the second thermal regeneration reaction unit 2 to move to correspond to different catalyst modules 17. The quantity of the SCR catalyst modules in the existing SCR catalyst reactor 16 is small, the module sizes are basically uniform, a first guide rail 31, a second guide rail 32, a first movable switching component 33 and a second movable switching component 34 are arranged, so that a first thermal regeneration reaction unit 1 and a second thermal regeneration reaction unit 2 can conveniently perform thermal regeneration reaction on different catalyst modules 17 in the SCR catalyst reactor 16, namely after one catalyst module 17 completes the thermal regeneration reaction, the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 can be controlled to rapidly move to the next catalyst module 17 along the first guide rail 31 and the second guide rail 32 respectively, the operation is convenient and fast, and the working efficiency is high.
The specific structures of the first mobile switching assembly 33 and the second mobile switching assembly 34 are as follows: referring to fig. 3, each of the first moving switching assembly 33 and the second moving switching assembly includes a moving housing 35, a moving member 36 connected to the moving housing 35, a first driving motor, a lifting shaft assembly connected to the housing, and a second driving motor, wherein the moving member 36 of the first moving switching assembly 33 and the moving member 36 of the second moving switching assembly are respectively disposed on the first guide rail 31 and the second guide rail 32, the first driving motor is used for driving the moving member 36 of the first moving switching assembly 33 and the moving member 36 of the second moving switching assembly to respectively move along the first guide rail 31 and the second guide rail 32, and when the moving member 36 moves, the moving housing 35 also moves therewith. The moving member 36 is a moving guide wheel or slider, the controller 30 is located in the moving housing 35, and the first driving motor can be located in the housing.
Lifting shaft subassembly one end is connected with removal casing 35, and the other end is used for being connected with the exit end 11 of first heat regeneration reaction unit 1, the entrance point 21 of second heat regeneration reaction unit 2, and second driving motor is used for driving the lifting shaft subassembly flexible, and second driving motor is located the casing and is connected with the lifting shaft subassembly outward.
Preferably, the lifting shaft assembly of the first thermal regeneration reaction unit 1 and the lifting shaft assembly of the second thermal regeneration reaction unit 2 are connected to the movable housing 35 by means of magnetic attraction, welding, fastening, etc., for example, the lifting shaft assembly is connected to the movable housing 35 by the first connecting member 40.
Preferably, the lifting shaft assembly of the first thermal regeneration reaction unit 1 and the lifting shaft assembly of the second thermal regeneration reaction unit 2 are respectively connected with the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 by means of magnetic adsorption, welding, fastener connection and the like. For example, the first moving switching assembly 33 and the second moving switching assembly further include a second connecting member 37, one end of the second connecting member 37 is connected to one end of the lifting shaft assembly, and the other end is connected to the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 respectively by magnetic adsorption, welding, fastening, and the like.
The lift axle assembly is preferably in the form of a telescopic sleeve comprising an outer sleeve 38 and an inner sleeve 39, the inner sleeve 39 being connected at one end to the second connector 37 and at the other end to one end of the outer sleeve 38, i.e. the inner sleeve 39 is slidable along an inner channel of the outer sleeve 38, and the other end of the outer sleeve 38 being connected to the housing.
When the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 are respectively connected to the inlet and the outlet of the same catalyst module 17, in order to prevent the loss of the thermal regeneration medium in the thermal regeneration reaction from affecting the reaction effect, the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 are further provided with a sealing member 4, see fig. 2, the sealing member 4 of the outlet end 11 of the first thermal regeneration reaction unit 1 and the sealing member 4 of the inlet end 21 of the second thermal regeneration reaction unit 2 are respectively used for sealing and connecting the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 with the inlet and the outlet of the same catalyst module 17.
The specific structure of the seal member 4 is as follows: an electromagnetic coil is arranged in the sealing part 4, when the electromagnetic coil is electrified to generate magnetic attraction, the outlet end 11 of the first heat regeneration reaction unit 1 and the inlet end 21 of the second heat regeneration reaction unit 2 are connected with the inlet and the outlet of the catalyst module 17 in an adsorption manner, the sealing performance is improved, and the heat regeneration medium is prevented from leaking outside; when the electromagnetic coil is powered off, the magnetic force is eliminated, so that the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 are separated from the inlet and the outlet of the catalyst module 17, and the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 can be conveniently moved to the next catalyst module 17. The seal member 4 exerts a sealing effect without damaging the catalyst module 17.
In order to facilitate the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 to accurately move to the corresponding catalyst module 17 positions, the driving unit further includes a controller 30, when the catalyst module 17 needs to be switched, the controller 30 controls the first mobile switching component 33 and the second mobile switching component 34 to move so as to drive the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 to move to the corresponding catalyst module 17 positions, so as to realize the switching of the catalyst modules 17 one by one, and to accurately position, so as to perform thermal regeneration reaction on all the catalyst modules 17. The temperature in the SCR catalyst reactor 16 is high, manual intervention is not needed, and automatic monitoring operation is achieved.
The controller 30 is further configured to control the sealing component 4 to connect the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 with the inlet and the outlet of the same catalyst module 17 in a sealing manner, and after the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 move to positions corresponding to the catalyst module 17, the outlet end 11 of the first thermal regeneration reaction unit 1 and the inlet end 21 of the second thermal regeneration reaction unit 2 are respectively connected with the inlet and the outlet of the same catalyst module 17 in a sealing manner, so as to ensure the sealing performance of the thermal regeneration reaction, implement automatic intelligent regeneration, and greatly improve the efficiency and the safety of the regeneration operation.
The controller 30 is connected with the heating unit 6 and the temperature measuring unit 19, and the controller 30 is also used for controlling the heating unit 6 to work according to the detection result of the temperature measuring unit 19 so as to ensure that the temperature of the heat regeneration medium is within a preset temperature range, realize intelligent control of heating time and reduce energy waste.
The ammonia concentration detection unit 7 is configured to detect the ammonia concentration of the tail gas in the second thermal regeneration reaction unit 2, and the ammonia concentration detection unit 7 may be disposed at an outlet end of the second thermal regeneration reaction unit 2 or in the second thermal regeneration reaction unit 2. The ammonia concentration detection unit 7 is connected with the ammonia concentration detection unit, the ammonia concentration detection unit 7 is specifically connected with the controller 30, the ammonia concentration detection unit 7 is used for sending a detection result to the controller 30, and the controller 30 controls the movement of the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 according to the received detection result. The ammonia concentration of the thermal regeneration medium is monitored through the ammonia concentration detection unit 7, whether thermal regeneration is qualified or not is judged, so that the thermal regeneration time is controlled, the thermal regeneration effect is guaranteed, and energy waste is reduced. If the online ammonia concentration detected by the ammonia concentration detection unit 7 during the thermal regeneration process reaches the preset ammonia concentration threshold, the controller 30 determines that the thermal regeneration is completed, and may control the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 to move to the next catalyst module 17, and if the online ammonia concentration does not reach the preset ammonia concentration threshold, the controller determines that the thermal regeneration is not completed, and continues to perform the thermal regeneration reaction on the catalyst module 17. Whether the regeneration reaction is completed or not is evaluated through the ammonia concentration detection unit 7, the method is reliable and effective, the ammonia concentration detection unit 7 is connected with the controller 30, and the controller 30 controls the first thermal regeneration reaction unit 1 and the second thermal regeneration reaction unit 2 to move according to the detection result of the ammonia concentration detection unit 7, so that the automatic control of the regeneration reaction is realized.
Preferably, a plurality of guide plates 18 are arranged in the outlet of the first thermal regeneration reaction unit 1 and the inlet of the second thermal regeneration reaction unit 2, the guide plates 18 are horizontally arranged, each guide plate is arranged up and down (or the upper end of each guide plate is inclined towards the lower end of each guide plate), and the guide plates 18 at the outlet of the first thermal regeneration reaction unit 1 facilitate the uniform dispersion flow of the thermal regeneration medium into the catalyst module 17 and play a role in buffering; the guide plate 18 at the inlet of the second thermal regeneration reaction unit 2 facilitates the uniform dispersion and discharge of the tail gas after the thermal regeneration reaction.
The specific structure of the heat regeneration medium supply unit is as follows: the device comprises a medium conveying pipeline 5 and a heating unit 6, wherein the inlet end of the first heat regeneration reaction unit 1 is communicated with the medium conveying pipeline 5, the inlet end 51 of the medium conveying pipeline 5 is communicated with a regeneration medium source, and the regeneration medium source is communicated and used for conveying a regeneration medium to the medium conveying pipeline 5. The medium conveying pipeline 5 is communicated with the inlet end of the first heat regeneration reaction unit 1 through a telescopic pipeline, the telescopic pipeline can be made of steel or other high-temperature-resistant metal materials, such as a high-temperature-resistant metal hose, when the heat regeneration reaction unit is used, the positions of the medium conveying pipeline 5 and the heating unit 6 are unchanged, the medium conveying pipeline and the heating unit stretch or shorten through the telescopic pipeline, the medium conveying pipeline can move telescopically according to the position of a catalyst module 17 in the SCR catalyst reactor 16, and meanwhile, the heat regeneration reaction unit is convenient to disassemble and install.
The heating unit 6 is arranged between the medium conveying pipeline 5 and the first thermal regeneration reaction unit 1 and is used for heating the regeneration medium. A temperature measuring unit 19 is further arranged between the medium conveying pipeline 5 and the first thermal regeneration reaction unit 1, the regenerated medium is subjected to program control temperature rise through the heating unit 6, and after the actual temperature is fed back by the temperature measuring unit 19, the regenerated medium enters a single SCR denitration catalyst module 17 in the SCR catalyst reactor 16 through a guide plate 18 to be subjected to temperature rise thermal regeneration. Setting the temperature of the thermal regeneration medium to be 300-500 ℃, because the decomposition temperature of ammonium sulfate is about 300 ℃, the ammonium sulfate deposited on the surface of the denitration catalyst in the SCR reactor can be decomposed only when the temperature of the thermal regeneration medium is set to be higher than 300 ℃, so that the aim of removing the ammonium sulfate is fulfilled, and the denitration catalyst is regenerated to recover the activity of the catalyst; and the temperature is too high, which is easy to cause the deactivation of the catalyst module and the waste of energy.
The device still includes exhaust emission pipeline 8, the exit end and the exhaust emission pipeline 8 of second heat regeneration reaction unit 2 are linked together, the air discharge after the exit end 81 heat supply regeneration reaction of exhaust emission pipeline 8, communicate through scalable pipeline between the exit end 21 of exhaust emission pipeline 8 and second heat regeneration reaction unit 2, the pipeline can be steel or other high temperature resistant metal material, like high temperature resistant metal collapsible tube, can stretch out and draw back the removal according to catalyst module 17 position in the SCR catalyst reactor 16, be convenient for second heat regeneration reaction unit 2 removes in SCR catalyst reactor 16.
In order to facilitate the recovery treatment of the impurities generated after the thermal regeneration reaction, the device further comprises a separation ash removal unit 9 and a tail gas absorption unit 10, wherein the separation ash removal unit 9 and the tail gas absorption unit 10 are arranged between the second thermal regeneration reaction unit 2 and the tail gas discharge pipeline 8, preferably, the separation ash removal unit 9 is located between the second thermal regeneration reaction unit 2 and the tail gas absorption unit 10, that is, the separation ash removal unit 9 is arranged at the rear part of the tail gas absorption unit 10, and collects the dust and absorbs the tail gas. The dust on the catalyst module 17 is cleaned by using airflow, and then the fly ash (including the dust on the catalyst module 17) generated in the thermal regeneration process is collected by the separation dust removal unit 9, so that the dual effects of thermal regeneration and ash removal are achieved, and the separated dust is collected in an ash warehouse; tail gas (e.g. NH) produced after thermal regeneration3And SO3Etc.) is absorbed by the exhaust gas absorption unit 10, thereby completing the regeneration of the individual catalyst modules 17. The separation ash removal unit 9 has multiple structures with tail gas absorption unit 10, can collect the dust, absorb tail gas's structure is all applicable to this application, so prescribe a limit to the concrete structure of separation ash removal unit 9 and tail gas absorption unit 10. Through setting up separation dusting unit 9, but cyclic utilization heat regeneration medium (hot-blast), direct dust removal in SCR catalyst reactor, dust collection efficiency is high, and dust removal effect is good.
The heat regeneration medium supply unit further comprises a circulation pipeline 11, the circulation pipeline 11 is communicated with the medium conveying pipeline 5 and the tail gas discharge pipeline 8, and a circulation valve 12 is arranged on the circulation pipeline 11. Preferably, the medium conveying pipeline 5 is provided with an air inlet valve 13, the tail gas discharge pipeline 8 is provided with an exhaust valve 14, more preferably, the heat regeneration medium supply unit further comprises an induced draft fan 15, the induced draft fan 15 is arranged on the tail gas discharge pipeline 8, and in the heat regeneration reaction process, the heat regeneration medium is recycled through the combined control of the induced draft fan 15, the air inlet valve 13, the circulating valve 12 and the exhaust valve 14, so that the energy is saved and the heat regeneration medium is reasonably discharged.
The working process of the thermal regeneration device for the ammonium bisulfate poisoning denitration catalyst provided by the embodiment is as follows: the method comprises the steps of firstly, communicating an outlet end 11 of a first thermal regeneration reaction unit 1 and an inlet end 21 of a second thermal regeneration reaction unit 2 with a medium conveying pipeline 5 and a tail gas discharge pipeline 8 respectively, then, extending the inlet end of the first thermal regeneration reaction unit 1 and the outlet end of the second thermal regeneration reaction unit 2 into an SCR catalyst reactor 16 to be connected with an inlet and an outlet of the same catalyst module 17 respectively, enabling a regeneration medium to enter the medium conveying pipeline 5 from an inlet of the medium conveying pipeline 5, raising the temperature to a set temperature through program control of a heating unit 6 to form a thermal regeneration medium, feeding the thermal regeneration medium into the first thermal regeneration reaction unit 1 (heating the regeneration medium while introducing the regeneration medium) after the temperature is qualified by feedback of a temperature measuring unit 19, and enabling the thermal regeneration medium to sequentially flow through a guide plate 18 and the catalyst module 17 to achieve thermal regeneration of the catalyst. The indication value of the ammonia concentration detection unit 7 is used for judging whether the thermal regeneration is qualified or not so as to control the thermal regeneration time, the fly ash generated in the thermal regeneration process is collected by the separation ash removal unit 9, and the tail gas (such as NH) is removed by the tail gas absorption unit 103And SO3Etc.), regeneration of the individual catalyst modules 17 is completed; the first guide rail 31, the second guide rail 32, the first movable switching component 33 and the second movable switching component 34 are used for realizing switching movement and intelligent regeneration, and finally, the thermal regeneration of all catalyst modules 17 in the SCR denitration reactor is realized.
The thermal regeneration device of ammonium bisulfate poisoning denitration catalyst that this embodiment provided, to a catalyst module 17 completion thermal regeneration back, through drive unit with first thermal regeneration reaction unit 1, the switching of second thermal regeneration reaction unit 2 remove to next catalyst module 17, realize intelligent regeneration, finally realize all catalyst module 17's in the whole SCR denitration reactor thermal regeneration.
Another embodiment of the present invention provides a thermal regeneration apparatus for an ammonium bisulfate-poisoned denitration catalyst, the method using the thermal regeneration apparatus for an ammonium bisulfate-poisoned denitration catalyst, comprising the steps of:
s1, determining a catalyst module needing thermal regeneration;
s2, moving the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to the position of a catalyst module needing thermal regeneration, respectively connecting the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit with the inlet and the outlet of the catalyst module, and introducing a thermal regeneration medium to carry out thermal regeneration reaction; wherein the heat regeneration medium is air, nitrogen and argon, and the temperature is 300-500 ℃;
and S3, judging that the thermal regeneration is finished when the concentration of the ammonia at the outlet of the second thermal regeneration reaction unit reaches a preset ammonia concentration threshold value, and separating the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit from the inlet and the outlet of the catalyst module. And then moving the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to the next catalyst module needing thermal regeneration, repeating the steps for the next catalyst module needing thermal regeneration, regenerating the catalyst modules one by one, and performing thermal regeneration reaction on all the catalyst modules needing thermal regeneration in the SCR catalyst reactor.
Whether the thermal regeneration is finished or not is judged by detecting the ammonia concentration, and the method is safe, reliable and effective.
The mobile intelligent thermal regeneration device for the SCR denitration catalyst ammonium bisulfate poisoning in the waste power plant of the embodiment is applied to a thermal regeneration project of the SCR denitration catalyst in a certain waste power plant. The garbage power plant is provided with 16 SCR denitration catalyst modules, the temperature of the heating unit 6 is controlled to be 350 ℃, the feedback smoke temperature of the temperature measuring device in the hot smoke circulating regeneration process is 340 ℃, the online ammonia concentration is gradually reduced from 50 mu L/L in the hot regeneration process, when the online ammonia concentration reaches 0.1 mu L/L, the hot regeneration is judged to be completed, and the whole process consumes about 1 hour. Through the automatic switching of the driving unit, the device processes 6-9 catalyst modules in a single day, and completes the thermal regeneration of 16 catalyst modules in the plant in two days.
The case shows that the mobile intelligent thermal regeneration device for SCR denitration catalyst ammonium bisulfate poisoning has a good thermal regeneration effect, can reasonably judge the thermal regeneration time through an ammonia concentration analyzer during use, realizes mobile regeneration and intelligent regeneration through a driving unit, achieves double effects of thermal regeneration and ash removal through a separation ash removal unit, saves energy through flue gas circulation regulation, has obvious economical efficiency, energy conservation and universality, is quick and intelligent in the thermal regeneration process, and can obtain a good actual effect.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a thermal regeneration device of ammonium bisulfate poisoning denitration catalyst which characterized in that: the device comprises:
a heat regeneration medium supply unit for supplying a heat regeneration medium;
the device comprises a first thermal regeneration reaction unit and a second thermal regeneration reaction unit, wherein the first thermal regeneration reaction unit and the second thermal regeneration reaction unit are independent from each other and are respectively provided with a chamber for heat regeneration medium circulation, the chamber is provided with an inlet end and an outlet end, the inlet end of the first thermal regeneration reaction unit is communicated with a heat regeneration medium supply unit, and the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit are respectively used for extending into an SCR catalyst reactor and are connected with the inlet and the outlet of the same catalyst module;
the ammonia concentration detection unit is used for detecting the ammonia concentration of the tail gas in the second thermal regeneration reaction unit;
and the driving unit is used for driving the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to move in the SCR catalyst reactor, so that the first thermal regeneration reaction unit and the second thermal regeneration reaction unit are respectively connected with inlets and outlets of different catalyst modules.
2. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 1, characterized in that: the driving unit comprises a first guide rail, a second guide rail, a first movable switching component and a second movable switching component, the first guide rail and the second guide rail are respectively positioned at the inlet side and the outlet side of the catalyst module, the first movable switching component is movably arranged on the first guide rail, the first heat regeneration reaction unit is connected with the first movable switching component, and the first movable switching unit moves along the first guide rail to drive the first heat regeneration reaction unit to move so as to correspond to different catalyst modules; the second movable switching component is movably arranged on the second guide rail, the second heat regeneration reaction unit is connected with the second movable switching component, and the second movable switching unit moves along the second guide rail to drive the second heat regeneration reaction unit to move so as to correspond to different catalyst modules.
3. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 2, characterized in that: the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit are respectively provided with a sealing component, and the sealing components are used for hermetically connecting the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit with the inlet and the outlet of the same catalyst module respectively.
4. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 3, characterized in that: the sealing component is internally provided with an electromagnetic coil, and when the electromagnetic coil is electrified to generate magnetic attraction, the outlet end of the first heat regeneration reaction unit and the inlet end of the second heat regeneration reaction unit are connected with the inlet and the outlet of the catalyst module in an adsorption manner; when the electromagnetic coil is powered off, the outlet end of the first heat regeneration reaction unit and the inlet end of the second heat regeneration reaction unit are separated from the inlet and the outlet of the catalyst module.
5. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 3, characterized in that: the driving unit further comprises a controller, and the controller is used for controlling the first movable switching assembly and the second movable switching assembly to move to the positions corresponding to the catalyst modules and controlling the sealing component to hermetically connect the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit with the inlet and the outlet of the same catalyst module.
6. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 2, characterized in that: first removal switching module, second remove switching module including removing the casing, connecting removal casing on moving member, first driving motor, connection the casing on lift axle subassembly, second driving motor, the moving member setting on first guide rail, second guide rail, first driving motor be used for driving the moving member follow first guide rail, second guide rail remove, lift axle subassembly one end with the casing connect, the other end be used for with the exit end of first heat regeneration reaction unit, the entrance connection of second heat regeneration reaction unit, second driving motor be used for driving lift axle subassembly flexible.
7. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 1, characterized in that: the heat regeneration medium supply unit comprises a medium conveying pipeline, a heating unit and a tail gas discharge pipeline, and the inlet end of the first heat regeneration reaction unit is communicated with the medium conveying pipeline; the heating unit is arranged between the medium conveying pipeline and the first heat regeneration reaction unit and is used for heating a regeneration medium; the outlet end of the second heat regeneration reaction unit is communicated with the tail gas discharge pipeline.
8. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 7, characterized in that: the device still including separation dusting unit, tail gas absorption unit, separation dusting unit, tail gas absorption unit set up the second thermal regeneration reaction unit with the exhaust emission pipeline between, the separation dusting device be used for retrieving the dust that produces after the thermal regeneration reaction, tail gas absorption unit be used for collecting the tail gas after the thermal regeneration reaction.
9. The apparatus for thermally regenerating a denitration catalyst poisoned with ammonium bisulfate according to claim 7, characterized in that: the heat regeneration medium supply unit further comprises a circulating pipeline, the circulating pipeline is communicated with the medium conveying pipeline and the tail gas discharge pipeline, and a circulating valve is arranged on the circulating pipeline.
10. A thermal regeneration method of an ammonium bisulfate poisoned denitration catalyst is characterized in that: the method using the thermal regeneration apparatus of ammonium bisulfate poisoned denitration catalyst as set forth in any one of claims 1 to 9, comprising the steps of:
s1, determining a catalyst module needing thermal regeneration;
s2, moving the first thermal regeneration reaction unit and the second thermal regeneration reaction unit to the position of a catalyst module needing thermal regeneration, respectively connecting the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit with the inlet and the outlet of the catalyst module, and introducing a thermal regeneration medium to carry out thermal regeneration reaction;
and S3, judging that the thermal regeneration is finished when the concentration of the ammonia at the outlet of the second thermal regeneration reaction unit reaches a preset ammonia concentration threshold value, and separating the outlet end of the first thermal regeneration reaction unit and the inlet end of the second thermal regeneration reaction unit from the inlet and the outlet of the catalyst module.
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| CN113522372B (en) | 2024-01-19 |
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