WO2022222340A1 - 一种再生焙烧活化装置及其再生方法 - Google Patents
一种再生焙烧活化装置及其再生方法 Download PDFInfo
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- WO2022222340A1 WO2022222340A1 PCT/CN2021/115260 CN2021115260W WO2022222340A1 WO 2022222340 A1 WO2022222340 A1 WO 2022222340A1 CN 2021115260 W CN2021115260 W CN 2021115260W WO 2022222340 A1 WO2022222340 A1 WO 2022222340A1
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- feeding
- inner tank
- heat exchange
- air
- regeneration
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- 238000011069 regeneration method Methods 0.000 title claims abstract description 36
- 230000008929 regeneration Effects 0.000 title claims abstract description 31
- 239000003054 catalyst Substances 0.000 claims abstract description 47
- 238000004321 preservation Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 21
- 238000005485 electric heating Methods 0.000 claims description 16
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- 238000001035 drying Methods 0.000 claims description 8
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- 238000007789 sealing Methods 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
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- 238000007664 blowing Methods 0.000 claims description 2
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
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- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
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- UUUGYDOQQLOJQA-UHFFFAOYSA-L vanadyl sulfate Chemical compound [V+2]=O.[O-]S([O-])(=O)=O UUUGYDOQQLOJQA-UHFFFAOYSA-L 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
Definitions
- the invention relates to a catalyst regeneration device, in particular to a denitration catalyst factory regeneration roasting activation device and a regeneration method thereof.
- the purpose of the present invention is to provide a calcination activation device for denitration catalyst factory regeneration with high temperature uniformity, low energy consumption, good calcination activation effect and fixed catalyst position.
- a regenerative roasting activation device comprising: an incubator, wherein an inner liner, a thermal insulation layer, a feeding channel located below the inner liner, and a feeding material respectively communicated with the inner liner and the feeding channel are provided inside the incubator
- One end of the incubator is equipped with a furnace door for closing the inner tank; circulation device, the circulation device is installed on both sides of the inner tank, and is used to discharge air from the bottom of the inner tank and from the top of the inner tank return air; heating device, which is installed on the circulation device; heat exchange device, the heat exchange device includes a heat exchange box installed on the top of the insulation box, and the The air inlet pipe that communicates with the inner bladder and the heat exchanger installed in the heat exchange box, the heat exchanger is communicated with the inner bladder; the exhaust fan, the exhaust fan is installed in the heat exchange box.
- the top is connected with the heat exchanger for discharging the water vapor and waste gas in the inner tank; the fresh air fan is installed on the heat exchange box for blowing air; and the feeding device, the feeding The device includes a guide rail installed at the bottom of the feeding channel, a drive car for moving on the guide rail, and a feed plate installed on the top of the drive car and located in the inner tank for placing the catalyst.
- Another object of the present invention is to provide a method for regenerating a denitration catalyst, which is realized by using a regenerative roasting activation device.
- a denitration catalyst regeneration method comprising the following steps:
- the heat preservation temperature is 105°C-120°C, and the heat preservation time is 90-120 minutes;
- the holding temperature is 380°C-400°C, and the holding time is 150-180 minutes;
- the present invention has the following beneficial effects:
- the invention provides a denitration catalyst factory regeneration roasting activation device through a feeding device with a track to realize the roasting and activation of the catalyst at a fixed position, the air is discharged from the bottom of the left and right sides of the inner tank and then returned from the top of the inner tank, and the temperature is uniform. It has good performance, so that all parts of the catalyst module are heated at the same time, which improves the effect of roasting and activation, and reduces energy consumption.
- FIG. 3 is a schematic top view of the device in this embodiment.
- a denitration catalyst factory regeneration roasting activation device includes an incubator 1, a heating device, a heat exchange device, a circulation device, an exhaust fan 32, a fresh air fan 41 and a feeding device. in:
- the inside of the incubator 1 is provided with an inner tank 10, a thermal insulation layer 100, a feeding tank 101, and a feeding channel 12.
- the feeding tank 100 is located at the bottom of the inner tank 10, and the feeding channel 12 is located at the bottom of the feeding tank 101. , the feeding channel 12 is connected.
- the insulation box 1 is made of angle steel and channel steel as the skeleton.
- the outer shell is made of cold-rolled steel plate with a thickness of >2mm and material Q235, which is welded and riveted after rust removal and anti-rust treatment, and the surface is sprayed with moisture-proof paint.
- the thermal insulation layer 100 is filled between the inner liner and the shell of the thermal insulation box 1 for thermal insulation, and the thermal insulation layer adopts high-density aluminum silicate wool to ensure the thermal insulation effect.
- the front of the incubator 1 is equipped with a furnace door 11 .
- the furnace door 11 adopts a manual double-opening furnace door 11 and adopts a claw handle locking mechanism.
- the furnace door 11 is sealed with a glass fiber sealing material.
- the heating device includes: a controller, a temperature sensor (not shown in the figure) and an electric heating tube 61 .
- the temperature sensor and the electric heating tube 61 are both electrically connected to the controller.
- the electric heating tube 61 is installed in the circulation device.
- the electric heating tube 61 adopts a U-shaped low-load electric heating tube, and the material is 316L stainless steel.
- the electric heating tube 61 is placed horizontally to increase the heat dissipation contact area. ;
- the temperature sensors are installed on both sides of the inner tank 10, and the temperature sensors on both sides are staggered to improve the uniformity of temperature detection in the inner tank.
- the controller is installed in the control cabinet, and the control cabinet is placed on the side of the device.
- the controller includes a temperature controller.
- the temperature controller is composed of a digital display program instrument and a K-type thermocouple.
- the heating adopts SSR solid state relay non-contact power regulation and cycle wave. controller.
- the heating device may also be provided with a multi-channel temperature recorder for recording the temperature of multiple temperature measuring points.
- the heat exchange device includes a heat exchange box 31 , an air inlet pipe 36 and a heat exchanger 33 .
- the heat exchanger 33 is a pipeline heat exchanger 33 ; the air inlet pipe 36 is fixed on the heat preservation box 1 ; the exhaust fan 32 and the fresh air fan 41 are both installed on the heat exchange box 31 .
- the heat exchange box 31 is installed on the top of the heat preservation box 1 , and the heat exchange box 31 communicates with the inner tank 10 through the air inlet pipe 36 .
- the heat exchange inlet of the heat exchanger 33 is communicated with the top of the inner tank, the exhaust fan 32 is connected with the heat exchange outlet of the heat exchanger 33, and is used to discharge the water vapor and waste gas in the inner tank; the fresh air fan 41 is used to blow air, And increase the wind pressure, the fresh air fan 41 is communicated with the heat exchange box 33, the air at room temperature is heated by the heat exchanger 33 in the heat exchange box 31 and then enters the inner tank 10 through the air inlet pipe 36, and the hot air inside the inner tank 10 enters the inner tank 10. After entering the heat exchanger 33, the air at room temperature enters the heat exchange box 31 through the fresh air fan 41 to exchange heat with the heat exchanger 33 to increase the temperature of the air.
- the heat exchange device also includes a partition 35, which is used to cut off the heat exchange box 31 to form an air duct, so that the air at room temperature can flow in the opposite direction to the hot air in the heat exchanger 33, thereby improving the heat exchange efficiency.
- One end of the partition plate 35 is connected to one end of the heat exchange box 31 , and a ventilation channel is left between the other end and the heat exchange box 31 .
- the fresh air fan 41 and the air inlet pipe 36 are located on both sides of the partition plate 35 At one end of the plate 35, the air at room temperature enters from the fresh air fan 41, and then enters the inner tank 10 from the air inlet pipe 36 after being heated by the air duct formed by the partition plate 35, as shown in FIG. 3 .
- the heat exchanger 33 can also be equipped with an air guide plate 34.
- the air guide plates 34 are arranged staggered and perpendicular to the partition plate 35.
- the air guide plate 34 keeps the air at room temperature in the heat exchange box.
- the turbulent flow is formed in 31, which prolongs the heat exchange time, thereby improving the heat exchange efficiency, effectively increasing the temperature of the air entering the inner tank, and reducing energy consumption.
- the circulation device includes: a circulation fan 21 , a vertical air duct 23 , a connecting air duct 26 and an air outlet duct 24 .
- the connecting air duct 26 is fixed on the top of the inner bladder, and there are multiple connecting air ducts 26. The air outlets at both ends of the connecting air duct 26 are located on both sides of the inner bladder.
- the connecting air duct 26 is also communicated with the air inlet duct 36 for The air heated by the heat exchanger 33 is sent into the vertical air duct 23 .
- the circulating fan 21 is fixed on both sides of the top of the incubator 1 , and the fan blades 22 of the circulating fan 21 are located in the connecting air duct 26 , and the fan blades 22 are turbine fan blades.
- the vertical air duct 23 is fixed on both sides of the inner bladder 10, and the air inlet of the vertical air duct 23 is located at the air outlet of the connecting air duct 26 for inhaling the fresh air in the connecting air duct 26 and the air in the inner bladder.
- the air outlet of 23 is located at the bottom of the inner tank, and the electric heating pipe 61 is installed in the vertical air duct 23 and is located below the circulating fan 22 .
- the electric heating tube 61 is used to heat the air in the inner tank 10 , and the hot air heats the catalyst 9 .
- the air outlet duct 24 is arranged at the bottom of the vertical air duct 23, and is fixed on both sides of the bottom of the inner bladder 10. One end of the air outlet duct 24 is communicated with the vertical air duct 23, and the other end is located below the feeding plate 77.
- the feeding plate 77 is perforated plate.
- a deflector 25 is provided between the air outlet duct 24 and the vertical air duct 23, and the deflector 25 is a circular arc plate, which smoothly converts the wind in the vertical direction of the vertical air duct 23 into the horizontal direction of the air outlet duct 23. wind.
- the inner tank 10, the connecting air duct 26, the vertical air duct 23 and the air outlet duct 24 are all made of stainless steel plates with a thickness of >1.5mm and a material of 316L by welding and riveting, which are resistant to high temperature, corrosion and rust to ensure service life. .
- a fresh air regulating valve 42 is installed on the fresh air fan 41, and the fresh air regulating valve 42 is an electric valve, which is used to adjust the size of the air intake, thereby adjusting the temperature difference in the furnace.
- the exhaust fan 32 is a variable frequency fan, and the exhaust volume is adjusted by the frequency converter to meet the needs of process temperature control.
- the exhaust fan 32 can also be installed with an exhaust valve regulating valve furnace door 11, and the exhaust regulating valve furnace door 11 is an electric valve.
- the feeding device includes: a guide rail 71 , a driving car and a feeding plate 77 .
- the guide rail 71 is an I-beam and is fixed at the bottom of the feeding channel 12 .
- the feed plate 77 is used to place the catalyst 9 .
- the drive car is used to move on the guide rails 71 to bring the catalyst 9 in and out.
- the driving vehicle includes: a frame 73, a heat preservation board 76, a reduction motor 74, a driving shaft 75, a driving wheel 72, a driving sprocket, a driven sprocket and a chain.
- the drive shaft 75 is mounted on the bottom of the frame 73 through the bearing seat 78 , and a plurality of drive shafts 75 are arranged in parallel.
- the driving sprocket is fixed on the reduction motor 74, the driven sprocket is fixed on the drive shaft 75, and the chain is connected with the driving sprocket and the driven sprocket respectively.
- the traveling speed of the driving car is 4-6m/min.
- the thermal insulation board 76 is used to close the feeding chute 101, the thermal insulation board 76 is movably inserted into the feeding chute 101, the thermal insulation board 76 is fixed on the top of the frame 73, the feeding board 77 is fixed on the thermal insulation board 76, and the feeding board 77 can accommodate two The catalysts 9 are regenerated at the same time.
- a support rod 79 is installed between the heat preservation plate 76 and the feeding plate 77, and the support rod 79 is used to form an air inlet channel 770 between the heat preservation plate 76 and the feeding plate 77.
- the air outlet of the air outlet pipe 24 blows into The air inlet channel 770, because the feeding plate 77 is a mesh plate, just goes into and out of the inner tank 10 through the feeding plate 77.
- An elastic sealing gasket can be installed between the insulation board 76 and the two sides of the feeding chute 101, and the elastic sealing gasket can reduce the gap between the insulation board 76 and the feeding chute 101, so as to avoid heat exchange with the air outside the inner tank 10 and affect the temperature uniformity and increased energy consumption.
- An elastic sealing gasket can also be installed between the feeding plate 77 and the inner tank, so that the hot air from the air outlet 24 can only circulate from the bottom of the feeding plate 77 to ensure the heating of the catalyst 9 and improve the heating efficiency.
- the insulation board 76 is just inserted into the feeding trough 101, and the inner tank 10 and the feeding channel 12 are sealed at intervals, so that the insulation board 76 keeps the deceleration motor 74 and the like at the normal temperature of the feeding channel 12, so as to avoid high temperature caused by The gear motor 74 is damaged.
- the deceleration motor 74 drives the multiple rows of driving wheels 72 to walk on the guide rail 71 through the sprocket chain, so as to facilitate the entry and exit of the catalyst 9 module.
- a limit block and a travel switch are installed in the feeding channel 12 to prevent collision with the inner tank 10 .
- a travel switch can also be set on the furnace door 11, and the travel switch on the furnace door 11 can realize a linkage action.
- the driving car cannot run.
- the driving car can run.
- start the fan first and then heat it.
- stop the fan first and then stop the heating so as to prevent equipment failure caused by human misoperation.
- Double modules are allowed to be arranged longitudinally, the structure design is reasonable, and the internal flow field and temperature field are well uniform.
- the catalyst module is generally about 2m in length, about 1m in width, and 0.8-1.6m in height, and is arranged in a honeycomb or plate-type arrangement that flows up and down. Due to the longitudinal arrangement of the modules, multiple circulating fans can be arranged in the length direction, as shown in Figure 3, which greatly increases the circulating air volume and the uniformity of the flow field.
- Reasonable structural settings after the driving car is in place, the lower edge of the catalyst module just blocks the outer gap, and the circulating air from the bottom passes through the catalyst pores to the maximum extent.
- the inner tank adopts the air supply method of the left and right sides of the bottom outlet and the top return air, so that all parts of the catalyst module are heated at the same time.
- the number of hot air circulation in the furnace can be appropriately increased to improve the temperature uniformity in the furnace.
- arc or oblique guide plates are made to reduce wind resistance and improve the efficiency of hot air circulation.
- the no-load temperature difference of the device is less than or equal to 2%, and the flow velocity of the catalyst pores reaches 4-7m/s.
- the exhaust system is precisely controlled.
- the exhaust fan is equipped with a frequency converter and a regulating valve furnace door, which can flexibly control the exhaust frequency and intensity, and discharge the water vapor in the drying stage of the catalyst and the waste gas in the roasting and activation stage in time.
- the catalyst 9 that needs to be regenerated enters the inner tank 1 by driving the vehicle, and the furnace door 11 is closed, and the exhaust fan 32, the fresh air fan 41 and the electric heating pipe 61 start to work,
- the temperature in the inner tank 1 is raised from room temperature to 105°C-120°C, and it takes 30-40 minutes to reach the stage of water evaporation;
- the corresponding temperature curve is set according to the catalyst volume and water content of different projects.
- Reasonable process temperature control curve meets the needs of catalyst roasting and activation after loading, and ensures the quality of catalyst regeneration.
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Abstract
本发明涉及一种用于脱硝催化剂工厂再生焙烧活化装置及其再生方法包括：保温箱，保温箱内设有内胆、保温层、送料通道和送料槽，一端装有炉门；循环装置安装在内胆的两侧，用于从内胆的底部出风，从内胆的顶部回风；加热装置安装在循环装置上；换热装置包括换热箱、进风管和换热器，换热器与内胆相通；排气风机安装在换热箱的顶部且与换热器连接；新风风机安装在换热箱上；及送料装置，送料装置包括安装在送料通道底部的导轨、用于在导轨上移动的驱动车和安装在驱动车的顶部且位于内胆内用于放置催化剂的送料板。该装置通过带有轨道的送料装置实现催化剂固定位置焙烧活化，温度均匀性好，使催化剂模块各个部位同时受热，焙烧活化效果好、能耗低。
Description
本发明涉及一种催化剂再生装置，尤其是一种用于脱硝催化剂工厂再生焙烧活化装置及其再生方法。
目前，在火力发电厂中使用最为广泛、技术最为成熟的SCR脱硝技术中，需对使用后的失活催化剂进行再生。焙烧活化是再生工艺中一道重要工序，是恢复催化剂活性的关键。清洗后的催化剂模块在低浓度的硫酸氧钒或偏钒酸铵溶液中浸渍后，再经过水分干燥、焙烧固化和药剂分解等过程，使失活催化剂恢复机械强度和有效活性。但是现有的干燥焙烧装置内部温度场均匀性差、焙烧活化效果不好、能耗高、并且由于采用人工送料导致催化剂的在炉内的位置不居中，影响了温度的均匀性。
发明内容
本发明的目的是提供一种温度均匀性高、能耗低、焙烧活化效果好、催化剂位置固定的一种用于脱硝催化剂工厂再生焙烧活化装置。
为达到上述目的，本发明采用的一个技术方案是：
一种再生焙烧活化装置，包括：保温箱，所述保温箱的内部设有内胆、保温层、位于所述内胆下方的送料通道和分别与所述内胆和所述送料通道相通的送料槽，所述保温箱的一端装有用于封闭内胆的炉门；循环装置，所述循环装置安装在所述内胆的两侧，用于从内胆的底部出风，从内胆的顶部回风；加热装置，所述加热装置安装在所述循环装置上；换热装置，所述换热装置包括安装在所述保温箱顶部的换热箱、分别与所述换热箱和所述内胆相通的进风管和安装在所述换热箱内的换热器，所述换热器与所述内胆相通；排气风机，所述排气风机安装在所述换热箱的顶部且与所述换热器连接，用于排出内胆内的水汽和废气；新风风机，所述新风风机安装在所述换热箱上，用于吹入空气；及送料装置，所述送料装置包括安装在所述送料通道底部的导轨、用于在导轨上移动的驱动车和安装在所述驱动车的顶部且位于所述内胆内用于放置催化剂的送料板。
本发明的另一个目的是提供一种脱硝催化剂再生方法，采用再生焙烧活化装置实现。
为达到上述目的，本发明采用的一个技术方案是：
一种脱硝催化剂再生方法，包括以下步骤：
S1、干燥升温，从室温升至105℃-120℃，升温时间30-40分钟；
S2、保温干燥，保温温度为105℃-120℃，保温时间为90-120分钟；
S3、再生升温，继续升温至380℃-400℃，升温时间90-100分钟；
S4、焙烧活化，保温温度为380℃-400℃，保温时间为150-180分钟；
S5、缓慢降温，从焙烧活化的保温温度降至50℃-80℃，降温时间为60-80分钟；
S6、降至室温，继续降温至室温后取出催化剂。
与现有技术相比本发明具有以下有益效果：
本发明提供的一种用于脱硝催化剂工厂再生焙烧活化装置通过带有轨道的送料装置实现催化剂固定位置焙烧活化，从内胆左右两侧的底部出风然后从内胆的顶部回风，温度均匀性好，使催化剂模块各个部位同时受热，提高了焙烧活化的效果，并降低了能耗。
附图1是本实施例中装置的正向剖视示意图；
附图2是本实施例中装置的侧向剖视示意图；
附图3是本实施例中装置的俯视示意图；
附图4是本实施例中再生焙烧活化方法的温度和时间的曲线图。
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1-3所示的一种用于脱硝催化剂工厂再生焙烧活化装置，包括保温箱1、加热装置、换热装置、循环装置、排气风机32、新风风机41和送料装置。其中：
保温箱1的内部设有内胆10、保温层100、送料槽101、送料通道12，送料槽100位于内胆10的底部，送料通道12位于送料槽101的底部，送料槽101将内胆10、送料通道12相连通。
保温箱1以角钢、槽钢为骨架，外壳采用厚度>2mm、材质Q235的冷轧钢板经除锈防锈处理后焊接铆接制作，表面喷涂防潮涂料。保温层100填充在内胆和保温箱1的壳体之间，用于保温，保温层采用高密硅酸铝棉，保证保温效果。保温箱1的正面装有炉门11，炉门11的方式采用手动双开炉门11，采用羊角拉手锁紧机构，炉门11密封采用玻璃纤维密封材料。
加热装置包括：控制器、温度传感器(图中未示出)和电加热管61。其中温度传感器和电加热管61均与控制器电性连接。电加热管61安装在循环装置内，电加热管61采用U形低负荷电热管，材质为316L不锈钢，电加热管61水平放置，增大散热接触面积。；温度传 感器安装在内胆10的两侧，位于两侧的温度传感器交错设置，用于提高内胆内温度检测的均匀性。
控制器安装在控制柜中，控制柜置于装置的侧面，控制器包括温控仪，温控由数显程序仪表和K型热电偶等组成，加热采用SSR固态继电器无触点调功和周波控制器。加热装置还可以设有多通道温度记录仪，用于记录多个温度测点的温度。
换热装置包括换热箱31、进风管36和换热器33。其中换热器33为管道式换热器33；进风管36固定在保温箱1上；排气风机32和新风风机41均安装在换热箱31上。换热箱31安装在保温箱1的顶部，换热箱31通过进风管36与内胆10相连通。换热器33的换热进口与内胆的顶部相通，排气风机32与换热器33的换热出口连接，用于排出内胆内的水汽和废气；新风风机41用于吹入空气，并增大风压，新风风机41与换热箱33连通，室温的空气经过换热箱31内的换热器33加热后通过进风管36进入到内胆10内，内胆10内部的热空气再进入到换热器33中，室温的空气通过新风风机41进入到换热箱31内与换热器33进行换热，提高空气的温度。
换热装置还包括隔板35，隔板35用于隔断换热箱31，形成风道，使室温的空气能够与换热器33中热空气的流向相反，提高换热效率。其中隔板35的一端与换热箱31的一端连接，另一端与换热箱31之间留有通风通道，新风风机41和进风管36分别位于隔板35的两侧，且均位于隔板35的一端，室温的空气从新风风机41处进入，然后经过隔板35形成的风道加热后从进风管36进入到内胆10中，如图3所示。
在装有隔板35的基础上，换热器33上还可以装有导风板34，导风板34交错设置，并且与隔板35垂直，导风板34使室温的空气在换热箱31内形成紊流，延长换热时间，从而提高换热效率，有效提高进入内胆的空气温度，降低能耗。
循环装置包括：循环风机21、垂直风管23、连接风管26和出风管24。连接风管26固定在内胆的顶部，连接风管26设有多个，连接风管26两端的出风口均位于内胆的两侧，连接风管26还与进风管36相通，用于将经换热器33加热后的空气送入到垂直风管23中。循环风机21固定在保温箱1顶部的两侧，循环风机21的风叶22位于连接风管26内，风叶22为涡轮风叶。垂直风管23固定在内胆10的两侧，垂直风管23的进风口位于连接风管26的出风口处，用于吸入连接风管26中的新风和内胆内的空气，垂直风管23的出风口位于内胆的底部，电加热管61安装在垂直风管23内，且位于循环风叶22的下方。电加热管61用于加热内胆10内的空气，热空气对催化剂9进行加热。出风管24设置在垂直风管23的底部，且固定在内胆10底部的两侧，出风管24的一端与垂直风管23相通，另一端位于送料板77的下方，送料板77为网孔板。
其中，出风管24与垂直风管23之间设有导流板25，导流板25为圆弧板，将垂直风管23内垂直方向的风顺畅的转变为出风管23水平方向的风。
内胆10、连接风管26、垂直风管23和出风管24均采用厚度>1.5mm、材质为316L的不锈钢板经焊接铆接制作，具有耐高温、耐腐蚀、防锈作用，保证使用寿命。
新风风机41上安装新风调节阀42，新风调节阀42为电动阀门，用于调节进风量的大小，从而来调节炉内的温差。
排气风机32为变频风机，通过变频器来调节排气量、满足工艺控温需要。排气风机32上还可以安装排气阀调节阀炉门11，排气调节阀炉门11为电动阀门。
送料装置包括：导轨71、驱动车和送料板77。导轨71为工字钢，固定在送料通道12的底部。送料板77用于放置催化剂9。驱动车用于在导轨71上移动，将催化剂9送入和取出。
驱动车包括：车架73、保温板76、减速电机74、驱动轴75、驱动轮72、主动链轮、从动链轮和链条。驱动轴75通过轴承座78安装在车架73的底部，驱动轴75平行设有多个，驱动轮72固定在驱动轴75的两端，且活动位于导轨71上。主动链轮固定在减速电机74上，从动链轮固定在驱动轴75上，链条分别与主动链轮和从动链轮连接。驱动车行走速度为4～6m/min。
保温板76用于封闭送料槽101，保温板76活动插在送料槽101内，且保温板76固定在车架73的顶部，送料板77固定在保温板76上，送料板77上可以容纳两个催化剂9同时进行再生处理。保温板76与送料板77之间装有支撑杆79，支撑杆79用于保温板76与送料板77之间形成进风通道770，在本实施例中，出风管24的出风口吹入该进风通道770，由于送料板77为网孔板，这样正好通过送料板77出入内胆10内。
保温板76与送料槽101的两侧之间可以装有弹性密封垫，弹性密封垫减小保温板76与送料槽101之间的缝隙，避免与内胆10外的空气发生热交换，影响温度均匀性和增加能耗。
送料板77与内胆之间也可以装有弹性的密封垫，从而使出风管24出来的热空气只能从送料板77的下方向上循环，保证对催化剂9进行加热，提高加热效率。
驱动车进入内胆10后，保温板76正好插入至送料槽101内，将内胆10和送料通道12密封间隔，从而保温板76使减速电机74等处于送料通道12的常温中，避免高温导致减速电机74损坏。减速电机74通过链轮链条带动多排驱动轮72在导轨71上行走，方便催化剂9模块进出。送料通道12内装有限位块和行程开关，防止碰撞内胆10。此外，还可以在炉门11上设置行程开关，炉门11上行程开关可以实现联动作用，当炉门11关闭时，驱动车不可运行，当炉门11打开时驱动车可运行，当炉门11关闭时先启动风机，然后进行加热，当炉门11打开时先停止风机然后停止加热，杜绝人为误操作造成设备故障。
主要优点如下：
1、允许双模块(两个的催化剂)纵向布置，结构设计合理，内部流场和温度场均匀性较好。催化剂模块一般长度约2m、宽度约1m、高度为0.8～1.6m，呈上下流通的蜂窝式或板式布置。由于模块纵向布置，可在长度方向布置多个循环风机，如图3所示，大大增加循环风量和流场均匀性。合理的结构设置，驱动车入位后，催化剂模块下端边缘正好堵死外侧缝隙，将底部来的循环风最大限度通过催化剂孔道。内胆(反应室)采用左右两侧底部出风，顶部回风的送风方式，使催化剂模块各个部位同时受热。可适当增加炉内热风循环次数，提高炉内温度均匀性。炉顶及炉底转角处，制作有圆弧形或者斜向导流板，减小风阻，提高热风循环效率。通过精心设计，装置空载温差≤2％，催化剂孔道流速达到4～7m/s。
2、程序温控，精确稳定。采用管状电热元件加热，采用SSR固态继电器及周波控制器调功。周波控制器提高了调节精度和电源利用效率以及避免了打表针和电力设备增容，节电效果十分明显。配备进口温控仪表，实现工艺温度曲线的编程和程序控制，有效果满足催化剂干燥活化的温度控制要求。配备多通道温度记录仪，有效监测、记录炉内温度，温度传感器在内胆左右两侧交叉式布置，可有效检测炉内温度场的均匀性。
3、排气系统精确控制，排风机配变频器和调节阀炉门，可灵活控制排气频率和强度，及时将催化剂干燥阶段的水汽和焙烧活化阶段的废气排出。
4、配置顶部换热器达到余热回收目的，降低能耗。
以下具体阐述下采用本实施例装置进行脱硝催化剂再生的方法，如图4所示包括以下步骤：
S1、通过驱动车使需要再生的催化剂9进入内胆1中，并关闭炉门11，排气风机32、新风风机41以及电加热管61启动工作，
使内胆1中的温度从室温升至105℃-120℃，用时30-40分钟,达到水分蒸发的阶段；
S2、使内胆10中的温度保持恒温在105℃-120℃，保持90-120分钟，本阶段充分蒸发再生负载期间催化剂吸收的水分，每个模块含水约100～150kg；
S3、使内胆10中的温度继续升温至380℃-400℃，用时90-100分钟，达到焙烧活化温度区间；
S4、使内胆10中的温度保持恒温在380℃-400℃，维持150-180分钟，本阶段为最重要步骤，主要实现催化剂再生负载阶段表面浸渍上去的钒盐、钨盐等化合物充分焙烧活化，分解形成V
2O
5和WO
3等活性物质均匀的分布在催化剂表面，实现脱硝性能的恢复和提升；
S5、使内胆10中的温度从380℃-400℃降温至50℃-80℃，用时60-80分钟，本阶段缓慢降温，防止降温过快造成的催化剂开裂现象产生；
S6、降至室温后，排气风机32、新风风机41以及电加热管61停止工作，打开炉门11，通过驱动车取出模块。
根据不同项目催化剂体积量和含水率不同设定相应的温度曲线。合理的工艺控温曲线实现负载后催化剂焙烧活化需要，保证催化剂再生质量。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。
Claims (17)
- 一种再生焙烧活化装置，其特征在于，包括：保温箱，所述保温箱的内部设有内胆、保温层、位于所述内胆下方的送料通道和分别与所述内胆和所述送料通道相通的送料槽，所述保温箱的一端装有用于封闭内胆的炉门；循环装置，所述循环装置安装在所述内胆的两侧，用于从内胆的底部出风，从内胆的顶部回风；加热装置，所述加热装置安装在所述循环装置上；换热装置，所述换热装置包括安装在所述保温箱顶部的换热箱、分别与所述换热箱和所述内胆相通的进风管和安装在所述换热箱内的换热器，所述换热器与所述内胆相通；排气风机，所述排气风机安装在所述换热箱的顶部且与所述换热器连接，用于排出内胆内的水汽和废气；新风风机，所述新风风机安装在所述换热箱上，用于吹入空气；及送料装置，所述送料装置包括安装在所述送料通道底部的导轨、用于在导轨上移动的驱动车和安装在所述驱动车的顶部且位于所述内胆内用于放置催化剂的送料板。
- 根据权利要求1所述的再生焙烧活化装置，其特征在于，所述加热装置包括：控制器以及均与控制器连接的温度传感器和电加热管，所述温度传感器安装在所述内胆的两侧，所述电加热管安装在所述循环装置内，所述控制器安装在所述保温箱上。
- 根据权利要求2所述的再生焙烧活化装置，其特征在于，所述循环装置包括：循环风机、垂直风管和连接风管，所述连接风管固定在所述内胆的顶部且与所述进风管相通，所述循环风机固定在所述保温箱顶部的两侧，所述循环风机的风叶位于所述连接风管内；所述垂直风管固定在所述内胆的两侧，所述垂直风管的进风口位于所述连接风管的下方，所述垂直风管的出风口位于所述内胆的底部，所述电加热管安装在所述垂直风管内，且位于所述循环风叶的下方。
- 根据权利要求3所述的再生焙烧活化装置，其特征在于，所述循环装置还包括出风管，所述出风管固定在所述内胆底部的两侧，所述出风管的一端与所述垂直风管相通，另一端位于所述送料板的下方。
- 根据权利要求1所述的再生焙烧活化装置，其特征在于，所述换热装置还包括隔板，所述隔板的一端与所述换热箱的一端连接，另一端与所述换热箱之间留有通风通道，所述新风风机和所述进风管分别位于所述隔板的两侧，且均位于所述隔板的一端。
- 根据权利要求5所述的再生焙烧活化装置，其特征在于，所述换热装置还包括导风板，所述导风板固定在所述换热器上，且交错设置。
- 根据权利要求1所述的再生焙烧活化装置，其特征在于，还包括新风调节阀，所述新风调节阀安装在所述新风风机上。
- 根据权利要求1所述的再生焙烧活化装置，其特征在于，所述驱动车包括：车架，所述车架位于所述送料通道内，所述送料板装在所述车架的顶部；减速电机，所述减速电机固定在所述车架的底部；驱动轴，所述驱动轴通过轴承座安装在所述车架的底部；驱动轮，所述驱动轮固定在所述驱动轴的两端，且活动位于所述导轨上；主动链轮，所述主动链轮固定在所述减速电机上；从动链轮，所述从动链轮固定在所述驱动轴上；及链条，所述链条分别与所述主动链轮和所述从动链轮连接。
- 一种再生焙烧活化装置，其特征在于，包括：保温箱，其包括壳体、内胆、送料通道以及送料槽，所述内胆、送料通道以及送料槽均设置在所述壳体内，所述壳体上装有用于封闭所述内胆的炉门，所述的送料通道位于所述内胆下方，所述送料槽位于所述内胆与所述送料通道之间，并将所述内胆与送料通道连通；换热装置，其包括换热箱、换热器，所述换热箱通过进风管与所述内胆连通，一新风风机用于向所述换热箱吹入常温空气；所述换热器设置在所述换热箱内部，所述换热器的换热进口与所述内胆顶部连通，一排气风机与所述换热器的换热出口连通用于排出所述内胆内的水汽和废气；循环装置，其包括循环风机、连接风管以及垂直风管，所述连接风管位于所述内胆顶部并与所述进风管连通，所述循环风机的风叶位于所述连接风管内；所述垂直风管设置在所述内胆两侧，所述垂直风管的进风口位于所述连接风管的出风口处，所述垂直风管的出风口位于所述内胆底部；加热装置，其包括电加热管，所述的电加热管安装在所述的垂直风管内；送料装置，其包括驱动车、送料板，所述驱动车包括车架、保温板，所述保温板固定在所述车架顶部，所述送料板固定在所述保温板上，当该送料装置进入所述保温箱内后，所述车架位于所述送料通道内，所述保温板位于所述送料槽内，所述送料板位于所述内胆内。
- 根据权利要求9所述的再生焙烧活化装置，其特征在于，所述保温板与所述送料板之间装有支撑杆，使所述保温板与所述送料板之间形成进风通道，所述所述垂直风管的出风口位于所述进风通道内。
- 根据权利要求9所述的再生焙烧活化装置，其特征在于，所述送料板为网孔板。
- 根据权利要求9所述的再生焙烧活化装置，其特征在于，所述送料装置还包括导轨，所述 导轨安装在所述送料通道底部，所述驱动车可在所述导轨上移动。
- 根据权利要求9所述的再生焙烧活化装置，其特征在于，所述保温板与所述送料槽之间设置有弹性密封垫；所述送料板与所述内胆之间设置有弹性密封垫。
- 根据权利要求9所述的再生焙烧活化装置，其特征在于，所述壳体与内胆之间设置有保温层。
- 根据权利要求9所述的再生焙烧活化装置，其特征在于，所述换热装置还包括隔板，所述隔板的一端与所述换热箱的一端连接，另一端与所述换热箱之间留有通风通道，所述新风风机和所述进风管分别位于所述隔板的两侧，且均位于所述隔板的一端。
- 根据权利要求9所述的再生焙烧活化装置，其特征在于，所述换热装置还包括导风板，所述导风板固定在所述换热器上，且交错设置。
- 一种脱硝催化剂再生方法，其特征在于，该方法通过权利要求1至16中任意一项权利要求所述的再生焙烧活化装置实现，包括以下步骤：S1、干燥升温，使内胆中的温度从室温升至105℃-120℃，升温时间30-40分钟；S2、保温干燥，使内胆中的温度保持在105℃-120℃，保温时间为90-120分钟；S3、再生升温，使内胆中的温度继续升温至380℃-400℃，升温时间90-100分钟；S4、焙烧活化，使内胆中的温度保持在380℃-400℃，保温时间为150-180分钟；S5、缓慢降温，使内胆中的温度从焙烧活化的保温温度降至50℃-80℃，降温时间为60-80分钟；S6、降至室温，使内胆中的温度继续降温至室温后取出催化剂。
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