CN211865052U - Calcining device of SCR denitration catalyst - Google Patents
Calcining device of SCR denitration catalyst Download PDFInfo
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- CN211865052U CN211865052U CN201922391195.8U CN201922391195U CN211865052U CN 211865052 U CN211865052 U CN 211865052U CN 201922391195 U CN201922391195 U CN 201922391195U CN 211865052 U CN211865052 U CN 211865052U
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Abstract
The utility model discloses a calcination device of SCR denitration catalyst, each calcine the unit including heating furnace body, furnace gate and furnace gate hoisting device, stove in bear the weight of the mechanism, heated air circulation and diversion system, combustion heating system, burning fume emission and pipe-line system, fresh air supply system, intracavity waste moisture discharge system, manual operation safety platform and supporting electric control system etc. constitute. The thermal circulation fan is installed on one side of the furnace door, the bearing mechanism in the furnace is installed on the bottom of the furnace body, the furnace door and the furnace door lifting device are installed on two sides of the furnace body, the gas radiation pipe is connected with the combustion flue gas discharge pipe, the moisture exhaust port is installed above the furnace body shell, the fresh air supply port is installed on the top end of the cavity, the manual operation platform is installed on the top of the furnace body shell, and equipment such as an electrical control system is installed at a position 10 meters away from the calcining device. The device can effectively increase the calcination quantity of SCR denitration catalyst, and has guaranteed that the activity of each type of SCR denitration catalyst is stable, and the operation is safe and reliable.
Description
Technical Field
The invention relates to the technical field of selective catalytic reduction denitration catalysts, in particular to a calcining device for an SCR denitration catalyst.
Background
According to research, excessive nitrogen oxides (NOx) can cause a series of environmental problems such as acid rain, photochemical smog, ground ozone and the like, and during the 'twelve-five' period, the NOx is firstly listed in a constraint index system, so that the emission reduction of the NOx gradually becomes the key point of pollution emission reduction in China. In China, NOx generated by direct combustion of coal accounts for about 70% of the total emission, and a thermal power plant serving as a coal-fired household in China is naturally listed as one of important objects for reducing emission of nitrogen oxides. 7/month 2011, environmental protection agency's regulations: NO discharged by new power plantXHas a limit of 200mg/m3, NO in the region of interestXThe emission limit value is less than or equal to 100mg/m 3.
At present, a Selective Catalytic Reduction (SCR) method is the most mature denitration technology with highest denitration efficiency and the most extensive application at home and abroad, and an SCR denitration catalyst is used as the core of the SCR denitration technology, and the corresponding total amount of the SCR denitration catalyst reaches more than 80 ten thousand cubic meters in China. In order to effectively activate the activity of the catalyst, the calcination of the SCR catalyst is a crucial part of the production process, and directly affects the quality of the final product.
In the prior art, CN 208678821U can effectively calcine the denitration catalyst, but the calcining device can only calcine the denitration catalyst by taking a unit box as a unit, the calcining quantity is small, the denitration catalyst can only be used for a flat-plate type denitration catalyst, and in addition, the front end and the rear end of the device need to be operated by a plurality of workers, which wastes time and labor.
Disclosure of Invention
The purpose of the invention is as follows: to the above-mentioned defect among the prior art, the utility model provides a calcining device of SCR denitration catalyst.
The technical scheme is as follows: a calcining device for an SCR denitration catalyst is provided with a plurality of independent calcining units, wherein each calcining unit consists of a heating furnace body, a hot air circulating fan, a gas burner and a gas radiant tube, a furnace lining, a bearing mechanism in the furnace, a furnace door and a furnace door lifting device, a combustion flue gas discharge pipe, a moisture exhaust port, a fresh air supply port, a manual operation platform and a matched electrical control system; the thermal circulation fan is installed on one side of the furnace door, the bearing mechanism in the furnace is installed on the bottom of the furnace body, the furnace door and the furnace door lifting device are installed on two sides of the furnace body, the gas radiation pipe is connected with the combustion flue gas discharge pipe, the moisture exhaust port is installed above the furnace body shell, the fresh air supply port is installed on the top end of the cavity, the manual operation platform is installed on the top of the furnace body shell, and equipment such as an electrical control system is installed at a position 10 meters away from the calcining device.
Preferably, the outer framework of the shell of the heating furnace body is formed by short-circuiting the section steel (201) so as to ensure the stable operation of the furnace in a normal state.
Furthermore, the shell steel plate is formed by welding a 304-material steel plate with the thickness of 5mm on the shell framework, and a thermocouple detection hole is reserved at the top of each furnace body.
Preferably, the furnace lining is of a composite structure of refractory castable and aluminum silicate ceramic fibers, the furnace top and the furnace side are of full-fiber protective lining structures, and the fiber blocks are formed after being pre-compressed by 30%.
Furthermore, the furnace bottom is made of load-resistant and impact-resistant refractory castable to form a heat-insulating furnace body. The thickness of the furnace top heat-insulating layer is 300 mm. The thickness of both sides and the furnace bottom is 300mm, and the temperature rise on the surface of the outer wall of the furnace is ensured to be less than or equal to 30 ℃.
Preferably, the bottom of the furnace bottom of the bearing mechanism in the furnace is provided with three pad rails, the pad rails are made of heat-resistant stainless steel materials through casting, the bearing strength and effective ventilation conditions in a high-temperature state can be ensured, and meanwhile, the catalyst module can conveniently enter and exit the furnace under the action of a forklift outside the furnace and the module can conveniently and effectively calcine in a hot air circulation mode in the furnace.
Preferably, the furnace door shell is a steel structure frame formed by welding high-quality stainless steel plates (304). The section steel and the section steel are continuously welded closely, the section steel and the steel plate are welded on the section steel frame in a Stepper welding mode, and the furnace door frame protective plate is made of high-quality stainless steel (304) materials, so that the furnace door frame protective plate is not easy to corrode and deform after being used for a long time in a high-temperature working state.
Preferably, the furnace door lifting device can drive the furnace door to lift through an electric hoist (or a motor and a speed reducer), a movable pulley device, a transition wheel set and the like.
Furthermore, the power of the motor is increased by about 2.2KW, and the increasing speed is about 8-10 m/min.
Preferably, the heated air circulation fan adopts a high-temperature centrifugal fan structure, the fan shaft is made of stainless steel materials (material SLS 316L), and the fan is cooled in an air cooling mode.
Further, the impeller of the circulating fan was made of a heat-resistant steel material (material SUS 310S). The impeller is subjected to stress relief annealing treatment after being welded so as to prevent deformation and vibration in the long-term use process, and dynamic and static balance tests are performed after the impeller is subjected to annealing treatment so as to ensure stable operation of the fan. The fan is made into an integral hoisting structure, and is connected with the furnace body by a flange, so that the maintenance is convenient.
Preferably, the material of the combustion flue gas discharge pipe is 301 stainless steel, the thickness is 2mm, the exhaust pipe is provided with a heat preservation and insulation layer, the heat preservation layer is heat preservation cotton, and the surface of the exhaust pipe is packaged by 0.5mm galvanized sheets.
Furthermore, the height of the smoke exhaust chimney needs to be more than or equal to 3m higher than the roof of the factory building.
Preferably, the fresh air supply port is provided with an electric switch, and the execution butterfly valve can determine the supply amount of fresh air in the furnace through temperature or time signals.
Preferably, the moisture exhaust port pipeline is made of 304 stainless steel, has the thickness of 2mm and is provided with an expansion joint.
Furthermore, each moisture exhaust opening is provided with a manual switching value butterfly valve, and the opening degree of the butterfly valve is positioned according to the actual gas emission requirement.
Preferably, the manual operation platform is positioned at the top of the furnace body shell and is provided with a peripheral maintenance protective guard, and the protective platform is made of a common Q235 material so as to facilitate maintenance of the calcining furnace equipment and the furnace top component.
The use method of the calcining device of the SCR denitration catalyst comprises the following steps:
(1) before the equipment is started, checking whether an air duct, an exhaust duct and a connected connecting valve pump are sealed and unblocked, checking whether each part of the equipment is normal, checking whether various indicator lamps are normally flashing, checking whether connection and screws of each part of the equipment are fastened reliably, and checking whether fireproof facilities on site are complete and reliable;
(2) opening the furnace door, and placing the denitration catalyst module in a furnace bearing mechanism (5) by using a forklift;
(3) setting the calcining time and temperature of each heating furnace body through a human-computer interface of the field operation platform, and closing the furnace door to perform heating calcination;
(4) after the calcination is finished, after the temperature of the furnace body is reduced to the room temperature, the furnace door is opened, and the denitration catalyst module is forked out by a forklift to carry out the next process.
Preferably, the calcination time and temperature in step (3) need to be set according to different catalyst types, and different temperature rise, heat preservation and temperature reduction intervals need to be set.
The denitration catalyst is a vanadium-titanium denitration catalyst.
The device is formed by combining a plurality of independent calcining units, more specifically, 8 calcining units which can be independently used are arranged in one embodiment, 2 catalyst module assemblies can be placed in each calcining unit furnace body, a catalyst is loaded on a cavity bearing gasket through a forklift for heating and calcining, and 16 SCR denitration catalyst modules (including a plate type, a honeycomb type and a corrugated type) can be simultaneously calcined. By utilizing the denitration catalyst calcining method provided by the invention, corresponding catalyst calcining time, temperature and the like can be designed according to different types of catalysts, so that a plurality of modules can be calcined simultaneously, the defect that the calcining efficiency of the traditional catalyst unit box is too slow is overcome, a large amount of manpower is saved, the modules can be set by one person after being placed in a furnace body, and can be taken out immediately after calcining is finished, and the time and the labor are saved. According to the technical scheme, the calcination quantity of the SCR denitration catalyst can be effectively increased, and the stable activity and safe and reliable operation of various types of SCR denitration catalysts are ensured.
Has the advantages that:
(1) the process range is wide: the temperature and time of different types of catalyst products can be adjusted, and the quality (such as activity and the like) of the finished catalyst products can be reliably guaranteed.
(2) The operation is simple: the equipment realizes automatic management during working and can be used by single person operation.
(3) The operation is stable and reliable: the device can normally and stably work for a long time and is less interfered by the outside.
(4) Energy conservation: the device is in a mature stage on the aspects of heat preservation and temperature control design, and the energy-saving effect is obvious.
(5) Safety: the furnace door is lifted and lowered by a double-safety upper and lower limit switch to prevent the stroke of the furnace door from exceeding the limit.
Drawings
FIG. 1 is a front view of a single furnace body.
Fig. 2 is a top view of a single furnace body.
Fig. 3 is a schematic structural diagram of a catalyst calcining apparatus for a complete 8-furnace body.
Wherein: 1 heating a furnace body; 2 hot air circulating fan; 3, a gas burner and a gas radiant tube; 4 furnace lining; 5, a bearing mechanism in the furnace; 6 furnace door and furnace door lifting device; 7 a combustion flue gas discharge pipe; 8, a moisture discharging port; 9 fresh air is supplied to the mouth.
Detailed Description
The following examples are further illustrative of the present invention.
EXAMPLE 1 calcining device for SCR denitration catalyst
The calcining device unit comprises a heating furnace body 1, a hot air circulating fan 2, a gas burner and a gas radiant tube 3, a furnace lining 4, a furnace bearing mechanism 5, a furnace door and furnace door lifting device 6, a combustion flue gas discharge pipe 7, a moisture exhaust port 8, a fresh air supply port 9 and the like; the hot air circulating fan 2 is installed on one side of a furnace door, the bearing mechanism 5 in the furnace is installed on the bottom of the furnace body, the furnace door and a furnace door lifting device 6 are installed on two sides of the furnace body, a fuel gas radiant tube is connected with a combustion flue gas discharge pipe, a moisture exhaust port 8 is installed above a furnace body shell, a fresh air supply port 9 is installed on the top end of a cavity, a manual operation platform is installed on the top of the furnace body shell, and equipment such as an electrical control system is installed at a position 10 meters away from a.
The outer framework of the shell of the heating furnace body is formed by short-circuiting section steel (201) so as to ensure the stable work of the furnace in a normal state. The shell steel plate is welded on the shell framework by a 304-material steel plate with the thickness of 5mm, and a thermocouple detection hole is reserved at the top of each furnace body. The furnace lining adopts a composite structure of refractory castable and aluminum silicate ceramic fiber, the furnace top and the furnace side both adopt full-fiber protective lining structures, and the fiber blocks adopt a structural form of molding after pre-compression by 30%.
The furnace bottom is made of load-resistant and impact-resistant refractory castable to form a heat-insulating furnace body. The thickness of the furnace top heat-insulating layer is 300 mm. The thickness of both sides and the furnace bottom is 300mm, and the temperature rise on the surface of the outer wall of the furnace is ensured to be less than or equal to 30 ℃.
The bottom of the furnace bottom of the bearing mechanism in the furnace is provided with three pad rails, the pad rails are made of heat-resistant stainless steel materials through casting, the bearing strength and effective ventilation conditions in a high-temperature state can be ensured, and meanwhile, the catalyst module can conveniently enter and exit the furnace under the action of a forklift outside the furnace and the module can conveniently and effectively calcine in the furnace through hot air circulation.
The furnace door shell is a steel structure frame formed by welding high-quality stainless steel plates (304). The section steel and the section steel are continuously welded closely, the section steel and the steel plate are welded on the section steel frame in a Stepper welding mode, and the furnace door frame protective plate is made of high-quality stainless steel (304) materials, so that the furnace door frame protective plate is not easy to corrode and deform after being used for a long time in a high-temperature working state.
The furnace door lifting device can drive the furnace door to lift through an electric hoist (or a motor and a speed reducer), a high-strength chain, a movable pulley device, a transition wheel set and the like. The power of the motor is increased by about 2.2KW, and the increasing speed is about 8-10 m/min.
The hot air circulating fan adopts a high-temperature centrifugal fan structure, a fan shaft is made of stainless steel materials (material SLS 316L), and the fan is cooled in an air cooling mode.
The impeller of the circulating fan is made of heat-resistant steel (material SUS 310S). The impeller is subjected to stress relief annealing treatment after being welded so as to prevent deformation and vibration in the long-term use process, and dynamic and static balance tests are performed after the impeller is subjected to annealing treatment so as to ensure stable operation of the fan. The fan is made into an integral hoisting structure, and is connected with the furnace body by a flange, so that the maintenance is convenient.
The material of the combustion flue gas discharge pipe is 301 stainless steel, the thickness is 2mm, the exhaust pipe is provided with a heat preservation and insulation layer, the heat preservation layer is heat preservation cotton, and the surface of the heat preservation and insulation layer is packaged by 0.5mm galvanized sheets.
The height of the smoke exhaust chimney needs to be more than or equal to 3m higher than the roof of the factory building.
The fresh air supply port is provided with an electric switch, and the execution butterfly valve can determine the supply amount of fresh air in the furnace through temperature or time signals.
The moisture-discharging port pipeline is made of 304 stainless steel, has the thickness of 2mm, and is provided with an expansion joint.
Each moisture exhaust port is provided with a manual switching value butterfly valve, and the opening degree of the manual switching value butterfly valve is positioned according to the actual gas emission requirement.
The manual operation platform is positioned at the top of the furnace body shell and is provided with a peripheral maintenance protective guard, and the protective platform is made of a common Q235 material so as to be convenient for maintenance of the calcining furnace equipment and furnace top components.
Claims (9)
1. The utility model provides a calcination device of SCR denitration catalyst which characterized in that: the device is provided with a plurality of independent calcining units, each calcining unit consists of a heating furnace body (1), a hot air circulating fan (2), a gas burner and a gas radiant tube (3), a furnace lining (4), a bearing mechanism (5) in the furnace, a furnace door and furnace door lifting device (6), a combustion flue gas discharge pipe (7), a moisture exhaust port (8), a fresh air supply port (9), a manual operation platform and a matched electric control system; wherein, heated air circulation fan (2) are installed in furnace gate one side, and the stove is born weight of mechanism (5) and is installed in the furnace body bottom, and furnace gate hoisting device (6) are all installed to the furnace body both sides, and the gas radiant tube links to each other with burning flue gas delivery pipe (7), and hydrofuge mouth (8) are installed in furnace body shell top, and fresh air is supplied for mouth (9) and is installed in the cavity top, and manual operation platform installs in furnace body shell top, and electrical control system installs in 10 meters department apart from calcining device.
2. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the outer framework of the shell of the heating furnace body (1) is formed by short joints of section steel, so that the working stability of the furnace in a normal state is ensured.
3. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the bearing mechanism (5) in the furnace is provided with three pad rails at the bottom of the furnace bottom, and the pad rails are made of heat-resistant stainless steel materials through casting.
4. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the furnace door lifting device can drive the furnace door to lift through an electric hoist or a motor, a speed reducer, a movable pulley device and a transition wheel set.
5. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the hot air circulating fan (2) is of a high-temperature centrifugal fan structure, and the fan cooling is in an air cooling mode.
6. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the combustion flue gas discharge pipe (7) is provided with a heat insulation layer, the heat insulation layer is made of heat insulation cotton, and the surface of the heat insulation layer is packaged by galvanized plates.
7. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the fresh air supply port (9) is provided with an electric switch, and an execution butterfly valve can determine the supply amount of fresh air in the furnace through temperature or time signals.
8. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the pipeline of the moisture discharging port (8) is 304 stainless steel, has the thickness of 2mm, and is provided with an expansion joint.
9. The calcination apparatus for an SCR denitration catalyst according to claim 1, wherein: the manual operation platform is provided with a peripheral maintenance protective guard.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922391195.8U CN211865052U (en) | 2019-12-27 | 2019-12-27 | Calcining device of SCR denitration catalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922391195.8U CN211865052U (en) | 2019-12-27 | 2019-12-27 | Calcining device of SCR denitration catalyst |
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| CN211865052U true CN211865052U (en) | 2020-11-06 |
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| CN201922391195.8U Active CN211865052U (en) | 2019-12-27 | 2019-12-27 | Calcining device of SCR denitration catalyst |
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