CN111632628A - Preparation method and device of SCR plate-type denitration catalyst - Google Patents
Preparation method and device of SCR plate-type denitration catalyst Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 88
- 239000000463 material Substances 0.000 claims abstract description 63
- 238000005096 rolling process Methods 0.000 claims abstract description 37
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 36
- 239000010935 stainless steel Substances 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 238000010008 shearing Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000011572 manganese Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000002788 crimping Methods 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/22—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/20—Vanadium, niobium or tantalum
- B01J23/22—Vanadium
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- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/72—Copper
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- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
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Abstract
The invention relates to a preparation method and its apparatus of SCR plate-type denitration catalyst, coil stainless steel network after uncoiling, the surface is leveled, dispel the reverse stress, correct and rectify automatically, arrange the supplies on the surface of the stainless steel network plate evenly, reduce the temperature of the surface of the supplies rapidly; after n-level rolling and heating, shaping, folding, cutting into required size, drying and roasting. The equipment comprises an automatic uncoiler, a leveling machine, a stress relieving machine, a deviation correcting device and a distributing device which are sequentially connected, wherein the distributing device comprises a reciprocating distributing machine and a wind knife speed cooler; the material mixing machine and the spiral extruder are also arranged on the material distribution device; the distributing device is sequentially connected with the multi-stage rolling and heating system; the last-stage rolling and heating system is sequentially connected with a setting machine, a creasing machine, a shearing machine, a drying machine, a boxing system and a roasting furnace. The matching degree of each device is high, and the product quality of the plate-type catalyst and the production efficiency of a production line can be obviously improved.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a preparation method and a device of an SCR plate-type denitration catalyst.
Background
With the improvement of environmental protection requirements, denitration markets in the power industry and the SARS industry are all outbreak. In the face of such a large denitration market, most of domestic denitration catalyst production technologies are imitation products of imported foreign technologies or foreign technologies, the quality is uneven, and few denitration catalyst production lines with independent intellectual property rights in China are available. At present, most of the technologies of domestic plate-type denitration catalyst production lines are from German Yah robust and sturdy LongJM ARGILLON, and only a few families are domestic independent intellectual property rights. Due to the barrier of foreign technologies, the introduced technology cannot acquire the latest foreign technology and is difficult to master the core technology, which also brings trouble to the subsequent technology upgrading and optimization.
Disclosure of Invention
The invention provides a preparation method and a device of an SCR plate-type denitration catalyst, which overcome monopoly and blockade of the prior foreign technology.
A preparation method of an SCR plate-type denitration catalyst comprises the following steps:
(1) after uncoiling a stainless steel net coil, leveling the surface of the stainless steel net coil to eliminate the reverse stress of the stainless steel net plate, automatically correcting the position, and then entering a material distribution treatment process;
(2) the material is spirally extruded into particles, and is uniformly arranged on the surface of the stainless steel screen plate, so that the temperature of the surface of the material is rapidly reduced;
(3) after cooling, the material and the stainless steel screen plate enter a first-stage rolling way, and the granular material is formed on the stainless steel screen plate;
then, first-stage heating is carried out to quickly evaporate moisture in the materials; until n-level rolling and n-level heating; further heating and compacting the material of the stainless steel mesh plate;
(4) after n-level rolling and heating, shaping and folding, shearing into required size, drying and roasting to obtain the finished denitration catalyst.
Wherein, the material in the step (2) is one or a mixture of more of a vanadium-titanium based catalyst, a rare earth based catalyst, a manganese based catalyst, an iron based catalyst and a copper based catalyst; the material is spirally extruded into particles with the particle size of 1-20 mm; the thickness of the cloth is 5-20 mm.
In the step (3), the heating temperature of the first heating to the n-level heating is 200-350 ℃.
The drying temperature in the step (4) is 500-850 ℃; the roasting temperature is 300-650 ℃.
The invention also provides a preparation device of the SCR plate-type denitration catalyst, which comprises the following equipment: the automatic uncoiler is sequentially connected with the leveling machine, the stress relieving machine, the deviation rectifying device and the distributing device, and the distributing device comprises a reciprocating distributing machine and a wind knife speed cooling machine; the material mixing machine and the spiral extruder are also arranged on the material distribution device; the output end of the distributing device is sequentially connected with a multi-stage rolling and heating system; the outlet end of the heating furnace of the last stage of rolling and heating system is sequentially connected with a setting machine, a creasing machine, a shearing machine, a drying machine, a boxing system and a roasting furnace.
The multi-stage rolling and heating system comprises a first-stage roller press, a second-stage roller press, a first-stage heating furnace, a second-stage heating furnace and a multi-stage rolling and heating system, wherein the outlet end of the first-stage roller press is connected with the inlet end of the first-stage heating furnace, the outlet end of the first-stage heating furnace is connected with the inlet end of the second-stage roller press, the outlet end of the second-stage roller press is connected with the inlet.
The automatic uncoiler is an unpowered uncoiler; the diameter of a reverse roller in the stress relief machine is 20-50 mm; the material mixing machine is a vertical high-speed mixing mill.
The multi-stage rolling and heating system at least comprises a two-stage rolling machine and a heating furnace; the heating mode of the heating furnace is an infrared or microwave heating mode.
The roller diameter of the setting machine is 300-500 mm; the width-to-height ratio of folds of the pleating machine is 0.5-2, and the pleating machine is in a fold shape and is embedded into a roller of the pleating machine and belongs to rolling pleating; the dryer adopts a short wave infrared heating mode.
The preparation method mainly comprises the steps that the preparation device is utilized, a stainless steel net coil enters a leveling machine under the action of an automatic uncoiling machine, the leveling machine carries out surface leveling treatment on a stainless steel net plate, the leveled stainless steel net plate enters a stress relieving machine to relieve reverse stress of the stainless steel net plate, the stainless steel net plate after stress relieving realizes automatic deviation rectification of a production line under the action of a deviation rectifying device, and then the stainless steel net plate enters a material distributing device;
extruding the materials into particles of 1-20 mm by a screw extruder, uniformly distributing the materials on the surface of a stainless steel screen plate by a reciprocating distributing machine in a distributing device, and rapidly reducing the temperature of the surface of the materials by an air knife rapid cooling machine in the distributing device;
the cooled material and the stainless steel screen plate enter a first-stage roller press, and the first-stage roller press is used for forming granular materials on the stainless steel screen plate; the primary heating furnace is used for heating the formed material to quickly evaporate moisture in the material; the secondary roller press is used for rolling and rapidly drying the materials through the primary heating furnace, so that the density and the strength of the materials are improved; the secondary heating furnace is used for further heating the material discharged by the secondary roller press and further evaporating the moisture in the material; the three-stage roller press, the three-stage heating furnace to the n-stage roller press and the n-stage heating furnace are used for further heating and compacting the materials of the stainless steel mesh plate, the mechanical strength of the catalyst is continuously improved, and the number of stages of rolling and heating depends on relevant parameters such as viscosity, water content, hardness and the like of the materials.
After n-level rolling and heating, the denitration catalyst enters a setting machine, after the denitration catalyst is pleated by a pleating machine, the denitration catalyst is cut into required sizes by a shearing machine, the denitration catalyst enters a drying machine, after the final drying, the boxing is finished by a boxing system, and the denitration catalyst enters a roasting furnace for roasting, so that the denitration catalyst finished product is obtained after the roasting.
Compared with the prior art, the preparation method and the device of the SCR plate-type denitration catalyst have the following beneficial technical effects:
1. the automatic uncoiler uncoils without power, so that the uncoiling speed and the production line speed are synchronous;
2. the stress relieving machine effectively relieves the stress generated after the stainless steel screen plate is rolled into a net roll, ensures the flatness of the stainless steel screen plate before entering the deviation correcting device and improves the deviation correcting precision of the deviation correcting device;
3. the deviation correcting device is provided with a screen plate tension measuring device and a screen plate tension control device, so that the situation that the screen plate is broken due to overlarge screen plate tension to influence the continuous production and the production efficiency of a production line is prevented;
4. the air knife quick cooling machine can quickly dry and reduce the moisture and temperature on the surface of the granular material, and effectively prevent the granular material from being bonded on the surface of the roller to influence the surface smoothness and flatness of the product;
5. the primary roller press adopts a strong roller mode of rolling small rollers and materials into small rollers, so that the roller pressure of the rollers is improved, and the forming effect of the materials is ensured;
6. the shaping roller adopts a large-roller straight roller to carry out final rolling shaping on the catalyst screen plate, so that the flatness of a product before entering a pleating machine is ensured, and the pleating precision is improved;
7. the crimping mode adopts a rolling crimping mode instead of the existing punching crimping technology, so that the crimping continuity is good, and the matching degree with a production line is higher;
8. the dryer adopts high-temperature rapid drying to finish carbonization treatment of the surface of the catalyst, and the influence of the strength reduction of the catalyst caused by moisture absorption before roasting of the catalyst is reduced.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention.
Detailed Description
The invention provides a preparation method of an SCR plate-type denitration catalyst and a device thereof, and the invention is further explained by combining specific embodiment examples.
As shown in fig. 1, a preparation apparatus of an SCR plate-type denitration catalyst includes the following devices: the automatic uncoiler 1 is sequentially connected with a leveling machine 2, a stress relieving machine 3, a deviation correcting device 4 and a distributing device 7, and the distributing device 7 comprises a reciprocating distributing machine and a wind knife speed cooler; the material mixing machine 5 and the screw extruder 6 are also arranged on the material distribution device 7; the output end of the distributing device 7 is sequentially connected with a multi-stage rolling and heating system; the outlet end of the heating furnace of the last stage of rolling and heating system is sequentially connected with a forming machine 13, a creasing machine 14, a shearing machine 15, a drying machine 16, a boxing system 17 and a roasting furnace 18.
The multi-stage rolling and heating system comprises a first-stage roller press 8, a first-stage heating furnace 9, a second-stage roller press 10, a second-stage heating furnace 11, a second-stage roller press 8, a second-stage heating furnace 11 and a third-stage roller press, wherein the outlet end of the first-stage roller press is connected with the inlet end of the first-stage heating furnace 9, the outlet end of the first-stage heating furnace 9 is connected with the inlet end of the second-stage roller press 10, the outlet.
The automatic uncoiler 1 is an unpowered uncoiler; the diameter of a reverse roller in the stress relieving machine 3 is 20-50 mm; the material mixing machine 5 is a vertical high-speed mixing mill.
The multi-stage rolling and heating system at least comprises a two-stage rolling machine and a heating furnace; the heating mode of the heating furnace is an infrared or microwave heating mode.
The roller diameter of the setting machine 13 is 300-500 mm; the width-to-height ratio of the folds of the pleating machine 14 is 0.5-2, and the pleating machine 14 is embedded into a roller of the pleating machine in a fold shape and belongs to rolling pleating; the dryer 16 adopts a short wave infrared heating mode.
The preparation method comprises the following steps:
the method comprises the following steps that a stainless steel net roll enters a leveling machine 2 under the action of an automatic uncoiling machine 1, the leveling machine 2 runs at the speed of 6m/min, the surface of a stainless steel net plate is leveled, the leveled stainless steel net plate enters a stress relieving machine, the reverse stress of the stainless steel net plate is relieved, and the stainless steel net plate with the stress relieved realizes automatic deviation rectification of a production line under the action of a deviation rectification device 4;
then the materials enter a material distribution device 7, a screw extruder 6 extrudes the materials into particles with the diameter of 5mm, the materials are uniformly distributed on the surface of a stainless steel screen plate by a reciprocating material distribution machine in the material distribution device 7, the temperature and the humidity of the surface of the materials are rapidly reduced by an air knife rapid cooling machine in the material distribution device 7, and the cooled and dried materials and the stainless steel screen plate enter a primary roller press 8 at the speed of 6 m/min;
the roll gap of the first-stage roller press 8 is 0.2mm, the first-stage roller press 8 forms granular materials on a stainless steel screen plate, and the thickness of the formed screen plate is maintained to be 0.5-0.6 mm; setting the heating temperature of the primary heating furnace 9 to be 200 ℃, heating the formed material by the primary heating furnace 9 to quickly evaporate water in the material, and keeping the water content of the material to be about 25% after the material is heated by the primary heating furnace; the secondary roller press 10 rolls the materials which are rapidly dried by the primary heating furnace at the speed of 6m/min, so that the density and the strength of the materials are improved; setting the heating temperature of the secondary heating furnace 11 to be 300 ℃, further heating the material discharged from the secondary rolling press by the secondary heating furnace 11, further evaporating the water in the material, and keeping the water content of the material at 18% after the material is heated by the secondary heating furnace; after the materials sequentially pass through a three-stage roller press, a three-stage heating furnace to an n-stage roller press and an n-stage heating furnace, the moisture content of the final material is maintained at about 10%;
after n-level rolling and heating, the raw materials enter a setting machine 13, and are cut into single pieces with the length of 500mm by a shearing machine 15 after being subjected to creasing by a creasing machine 14;
entering a dryer 16, setting the drying temperature of the dryer 16 to be 480 ℃, and finishing the drying and carbonization of the material surface;
after the boxing by the boxing system 17 is completed, the denitration catalyst enters the roasting furnace 18 for roasting, the roasting temperature of the roasting furnace 18 is set to 520 ℃, and the denitration catalyst is obtained after roasting.
Claims (10)
1. A preparation method of an SCR plate-type denitration catalyst is characterized by comprising the following steps:
(1) after uncoiling a stainless steel net coil, leveling the surface of the stainless steel net coil to eliminate the reverse stress of the stainless steel net plate, automatically correcting the position, and then entering a material distribution treatment process;
(2) the material is spirally extruded into particles, and is uniformly arranged on the surface of the stainless steel screen plate, so that the temperature of the surface of the material is rapidly reduced;
(3) after cooling, the material and the stainless steel screen plate enter a first-stage rolling way, and the granular material is formed on the stainless steel screen plate;
then, first-stage heating is carried out to quickly evaporate moisture in the materials; until n-level rolling and n-level heating; further heating and compacting the material of the stainless steel mesh plate;
(4) after n-level rolling and heating, shaping and folding, shearing into required size, drying and roasting to obtain the finished denitration catalyst.
2. The preparation method of the SCR plate-type denitration catalyst according to claim 1, wherein the material in the step (2) is one or a mixture of more of a vanadium-titanium-based catalyst, a rare earth-based catalyst, a manganese-based catalyst, an iron-based catalyst and a copper-based catalyst; the material is spirally extruded into particles with the particle size of 1-20 mm; the thickness of the cloth is 5-20 mm.
3. The preparation method of the SCR plate-type denitration catalyst according to claim 1, wherein the heating temperature of the first heating to the n-stage heating in the step (3) is 200-350 ℃.
4. The preparation method of the SCR plate-type denitration catalyst according to claim 1, wherein the drying temperature in the step (4) is 500-850 ℃; the roasting temperature is 300-650 ℃.
5. The preparation device of the SCR plate-type denitration catalyst is characterized by comprising the following equipment: the automatic uncoiler (1) is sequentially connected with a leveling machine (2), a stress relieving machine (3), a deviation correcting device (4) and a distributing device (7), and the distributing device (7) is also provided with a material mixing machine (5) and a spiral extruder (6); the distributing device (7) comprises a reciprocating distributing machine and a wind knife quick cooler; the output end of the distributing device (7) is sequentially connected with a multi-stage rolling and heating system; the outlet end of the heating furnace of the last stage of rolling and heating system is sequentially connected with a forming machine (13), a creasing machine (14), a shearing machine (15), a drying machine (16), a boxing system (17) and a roasting furnace (18).
6. The device for preparing the SCR plate-type denitration catalyst according to claim 5, wherein the multi-stage rolling and heating system comprises a first-stage roller press (8) having an outlet end connected to an inlet end of a first-stage heating furnace (9), the first-stage heating furnace (9) having an outlet end connected to an inlet end of a second-stage roller press (10), the second-stage roller press (10) having an outlet end connected to an inlet end of a second-stage heating furnace (11), the outlet end of the second-stage heating furnace (11) being sequentially connected to the rear until entering the n-stage rolling and heating system (12).
7. The preparation device of the SCR plate-type denitration catalyst according to claim 5, characterized in that: the automatic uncoiler (1) is an unpowered uncoiler; the diameter of a reverse roller in the stress relieving machine (3) is 20-50 mm; the material mixing machine (5) is a vertical high-speed mixing mill.
8. The preparation device of the SCR plate-type denitration catalyst according to claim 5, characterized in that: the multi-stage rolling and heating system at least comprises a two-stage rolling machine and a heating furnace; the heating mode of the heating furnace is an infrared or microwave heating mode; the heating length of the heating furnace is 2000-7000 mm.
9. The preparation device of the SCR plate-type denitration catalyst according to claim 5, characterized in that: the roller diameter of the setting machine (13) is 300-500 mm; the width-to-height ratio of the folds of the pleating machine (14) is 0.5-2, and the pleating machine (14) is embedded into a roller of the pleating machine in a fold shape and belongs to rolling pleating; the dryer (16) adopts a short wave infrared heating mode.
10. The preparation device of the SCR plate-type denitration catalyst according to claim 5, characterized in that: the production speed of the preparation device is 3-15 m/min.
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| CN102935387A (en) * | 2012-11-05 | 2013-02-20 | 北京华电光大新能源环保技术有限公司 | Continuous production device and production process of selective catalytic reduction (SCR) plate-type denitration catalyst |
| CN202876835U (en) * | 2012-11-05 | 2013-04-17 | 北京华电光大新能源环保技术有限公司 | Continuous production device for SCR (Selective Catalytic Reduction) plate type denitration catalyst |
| CN106732709A (en) * | 2016-11-15 | 2017-05-31 | 河南康宁特环保科技股份有限公司 | A kind of preparation technology of corrugated plate dst denitrating catalyst |
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2020
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| CN102935387A (en) * | 2012-11-05 | 2013-02-20 | 北京华电光大新能源环保技术有限公司 | Continuous production device and production process of selective catalytic reduction (SCR) plate-type denitration catalyst |
| CN202876835U (en) * | 2012-11-05 | 2013-04-17 | 北京华电光大新能源环保技术有限公司 | Continuous production device for SCR (Selective Catalytic Reduction) plate type denitration catalyst |
| WO2014067239A1 (en) * | 2012-11-05 | 2014-05-08 | 北京华电光大新能源环保技术有限公司 | Apparatus and process for continuous production of scr plate-type denitrated catalyst |
| CN106732709A (en) * | 2016-11-15 | 2017-05-31 | 河南康宁特环保科技股份有限公司 | A kind of preparation technology of corrugated plate dst denitrating catalyst |
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