TWI731290B

TWI731290B - Method and equipment for low-temperature catalyst denitration and dust removal using ceramic fiber filter tube

Info

Publication number: TWI731290B
Application number: TW108101325A
Authority: TW
Inventors: 王景良; 林永清
Original assignee: 富利康科技股份有限公司
Priority date: 2019-01-14
Filing date: 2019-01-14
Publication date: 2021-06-21
Also published as: TW202026058A

Abstract

一種應用陶纖濾管之低溫觸媒脫硝除塵的方法，適用於去除一廢氣中的粉塵及氮氧化物，並包含一混入氨基還原劑使該廢氣形成一待還原氣體的前處理步驟，及一將該待還原氣體輸入至少一附有觸媒的濾管的觸媒步驟。觸媒具有鈦氧化物、釩氧化物、鉬氧化物及鎢氧化物，使該待還原氣體通過該濾管時，形成一去除粉塵及氮氧化物的還原氣體。本發明亦提供一種應用陶纖濾管之低溫觸媒脫硝除塵的設備，包含一用以執行該前處理步驟的前處理單元，及一用以執行該觸媒步驟的觸媒單元。透過該應用陶纖濾管之低溫觸媒脫硝除塵的方法及設備，不須加熱該廢氣，即能以良好的脫硝效率處理該廢氣。 A low-temperature catalyst denitrification and dust removal method using a ceramic fiber filter tube is suitable for removing dust and nitrogen oxides in an exhaust gas, and includes a pretreatment step of mixing an amino reducing agent to make the exhaust gas form a gas to be reduced, and A catalyst step of inputting the gas to be reduced into at least one filter tube attached with a catalyst. The catalyst has titanium oxide, vanadium oxide, molybdenum oxide and tungsten oxide. When the gas to be reduced passes through the filter tube, a reducing gas for removing dust and nitrogen oxides is formed. The present invention also provides a low-temperature catalyst denitration and dust removal equipment using ceramic fiber filter tubes, which includes a pre-processing unit for performing the pre-processing step, and a catalyst unit for performing the catalyst step. Through the low-temperature catalyst denitrification and dust removal method and equipment using ceramic fiber filter tubes, the waste gas can be treated with good denitrification efficiency without heating the waste gas.

Description

應用陶纖濾管之低溫觸媒脫硝除塵的方法及設備 Method and equipment for low-temperature catalyst denitration and dust removal using ceramic fiber filter tube

本發明是有關於一種煙塵的處理方法及設備，特別是指一種用於處理廢氣的應用陶纖濾管之低溫觸媒脫硝除塵的方法及設備。 The present invention relates to a method and equipment for treating smoke and dust, in particular to a method and equipment for denitrification and dust removal by low-temperature catalyst using ceramic fiber filter tubes for waste gas treatment.

工廠中的鍋爐在經過燃燒作業後，將產生溫度高達200℃至1400℃的廢氣，為能妥善應用廢氣中的熱能，常對於廢氣進行熱回收，並將所回收的熱能用以發電。進行熱回收後的廢氣溫度通常將降至200℃以下，需要再去除其中的粉塵及氮氧化物後才能進行排放，以避免造成環境與空氣汙染。 The boiler in the factory will produce exhaust gas with a temperature as high as 200°C to 1400°C after the combustion operation. In order to properly use the heat energy in the exhaust gas, the exhaust gas is often recovered and the recovered heat energy is used to generate electricity. The temperature of the exhaust gas after heat recovery will usually drop below 200°C, and the dust and nitrogen oxides in it must be removed before it can be discharged to avoid environmental and air pollution.

參閱圖1與圖2，一種現有的廢氣除塵方法，包含一個以一加熱器81將該廢氣加熱到350℃的加熱步驟91、一個以一靜電式除塵器82吸附粉塵的靜電除塵步驟92、一個在一蜂巢式觸媒反應裝置83內加入氨型藥劑並以觸媒去除氮氧化物的還原脫硝步驟93、一個在一脫硫器84中於該廢氣裡加入水及石灰石而脫除硫元素的脫硫步驟94，及一將該廢氣導入一個不織布過濾器85，使該廢氣中的粉塵滯留於該不織布過濾器85中，且將該廢氣輸入到一排氣管86並排放的過濾步驟95。 1 and 2, an existing exhaust gas dust removal method includes a heating step 91 for heating the exhaust gas to 350°C with a heater 81, an electrostatic dust removal step 92 for adsorbing dust with an electrostatic precipitator 82, a A reductive denitrification step 93 in which ammonia-type reagents are added to a honeycomb catalyst reaction device 83 and nitrogen oxides are removed by a catalyst, and water and limestone are added to the exhaust gas in a desulfurizer 84 to remove sulfur elements. The desulfurization step 94, and the waste gas is introduced into a non-woven filter 85 to make the The dust in the exhaust gas is retained in the non-woven filter 85, and the exhaust gas is input to an exhaust pipe 86 and discharged in a filtering step 95.

須補充說明的是，在該脫硫步驟94中，常使用半乾式的方法，即以水霧及石灰石混合該廢氣而去除硫元素，另外也常使用濕式的方法，即以石灰石及水洗滌該廢氣而達到脫硫。由於在該還原脫硝步驟93中，所使用的觸媒要在溫度達250℃至350℃的環境中才能有良好的脫硝效率，故須在該加熱步驟91中加熱該廢氣。除了需要消耗額外的能源，加熱後的該廢氣更有可能在該過濾步驟95中，使該不織布過濾器85容易因高溫而損壞，需要加以改善。 It should be added that in the desulfurization step 94, a semi-dry method is often used, that is, the exhaust gas is mixed with water mist and limestone to remove sulfur. In addition, a wet method is often used, that is, washing with limestone and water. The exhaust gas achieves desulfurization. Since the catalyst used in the reduction denitration step 93 has a good denitrification efficiency in an environment with a temperature of 250°C to 350°C, the waste gas must be heated in the heating step 91. In addition to consuming extra energy, the heated exhaust gas is more likely to be damaged by the high temperature in the filtering step 95, which needs to be improved.

因此，本發明之目的，即在提供一種不需要加熱廢氣，即可有良好的脫硝效率的應用陶纖濾管之低溫觸媒脫硝除塵的方法。 Therefore, the object of the present invention is to provide a low-temperature catalyst denitrification and dust removal method using ceramic fiber filter tubes without heating the exhaust gas and having good denitration efficiency.

於是，本發明應用陶纖濾管之低溫觸媒脫硝除塵的方法，適用於去除一廢氣中的粉塵及氮氧化物，並包含一在該廢氣中混合氨基還原劑，使該廢氣形成一待還原氣體的前處理步驟，及一個在一反應溫度下將該待還原氣體輸入至少一個附有觸媒的濾管的觸媒步驟。觸媒具有鈦氧化物、釩氧化物、鉬氧化物及鎢氧化物，使該待還原氣體通過該至少一個濾管時，形成一去除粉塵及氮氧化物的還原氣體。 Therefore, the present invention uses the low-temperature catalyst denitrification and dust removal method of the ceramic fiber filter tube, which is suitable for removing dust and nitrogen oxides in an exhaust gas, and includes a mixture of an amino reducing agent in the exhaust gas, so that the exhaust gas is formed into a waste gas. A pretreatment step of reducing gas, and a catalyst step in which the gas to be reduced is fed into at least one filter tube with catalyst at a reaction temperature. The catalyst has titanium oxide, vanadium oxide, molybdenum oxide and tungsten oxide. When the gas to be reduced passes through the at least one filter tube, it forms a dust removal and nitrogen oxidation The reducing gas of the substance.

另外，本發明之另一目的，在於提供一種用以執行上述應用陶纖濾管之低溫觸媒脫硝除塵的方法的應用陶纖濾管之低溫觸媒脫硝除塵的設備。 In addition, another object of the present invention is to provide a low-temperature catalyst denitrification and dust removal device using ceramic fiber filter tubes to implement the above-mentioned low-temperature catalyst denitration and dust removal method using ceramic fiber filter tubes.

於是，本發明應用陶纖濾管之低溫觸媒脫硝除塵的設備，包含一用以執行該前處理步驟的前處理單元，及一連通該前處理單元並用以執行該觸媒步驟的觸媒單元。該觸媒單元包括至少一個適用於供該待還原氣體通過的濾管，及一附著於該至少一個濾管的觸媒，該觸媒具有鈦氧化物、釩氧化物、鉬氧化物及鎢氧化物，使該待還原氣體通過該至少一個濾管時，形成該還原氣體。 Therefore, the low-temperature catalyst denitrification and dust removal equipment using ceramic fiber filter tubes of the present invention includes a pre-processing unit for performing the pre-processing step, and a catalyst connected to the pre-processing unit and used to perform the catalyst step unit. The catalyst unit includes at least one filter tube suitable for passing the gas to be reduced, and a catalyst attached to the at least one filter tube. The catalyst has titanium oxide, vanadium oxide, molybdenum oxide, and tungsten oxide. When the gas to be reduced passes through the at least one filter tube, the reducing gas is formed.

本發明之功效在於：不需要再次加熱經過熱回收的該廢氣，該觸媒單元即能以良好的效率去除該廢氣中的粉塵及氮氧化物，能降低能源的耗費，並能避免該觸媒單元受到高溫而損壞，可節省設備成本。 The effect of the present invention is that the catalyst unit can remove dust and nitrogen oxides in the exhaust gas with good efficiency without reheating the exhaust gas after heat recovery, can reduce energy consumption, and can avoid the catalyst The unit is damaged by high temperature, which can save equipment cost.

11:脫硫步驟 11: Desulfurization step

12:前處理步驟 12: Pre-processing steps

13:觸媒步驟 13: Catalyst step

2:脫硫單元 2: Desulfurization unit

3:前處理單元 3: Pre-processing unit

4:觸媒單元 4: Catalyst unit

41:濾管 41: Filter tube

411:開口 411: open

42:觸媒 42: Catalyst

5:燃燒單元 5: Combustion unit

6:排氣單元 6: Exhaust unit

本發明之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一示意圖，說明一種現有的廢氣除塵設備；圖2是一方法流程圖，說明一種現有的廢氣除塵方法；圖3是一方法流程圖，說明本發明應用陶纖濾管之低溫觸媒脫硝除塵的方法的一方法實施例；圖4是一示意圖，說明本發明應用陶纖濾管之低溫觸媒脫硝除塵的設備的一裝置實施例；及圖5是一示意圖，說明該裝置實施例的一觸媒單元。 Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a schematic diagram illustrating an existing exhaust gas dust removal equipment; Figure 2 is a method flow chart illustrating an existing Exhaust gas dust removal method; Fig. 3 is a method flow chart illustrating a method embodiment of the low-temperature catalyst denitration and dust removal method using ceramic fiber filter tubes of the present invention; Figure 4 is a schematic diagram illustrating the low-temperature catalyst denitrification method of the present invention using ceramic fiber filter tubes A device embodiment of the nitrate dust removal equipment; and FIG. 5 is a schematic diagram illustrating a catalyst unit of the device embodiment.

參閱圖3，本發明應用陶纖濾管之低溫觸媒脫硝除塵的方法的一方法實施例，適用於去除一廢氣中的粉塵及氮氧化物，並包含一在該廢氣中混合脫硫劑並使該廢氣形成一已脫硫氣體的脫硫步驟11、一在該已脫硫氣體中混合氨基還原劑並使該已脫硫氣體形成一待還原氣體的前處理步驟12，及一個在一反應溫度下將該待還原氣體輸入多個附有觸媒的濾管，並使該待還原氣體形成一去除粉塵及氮氧化物的還原氣體的觸媒步驟13。 Referring to FIG. 3, a method embodiment of the low-temperature catalyst denitration and dust removal method using ceramic fiber filter tubes of the present invention is suitable for removing dust and nitrogen oxides in an exhaust gas, and includes a desulfurization agent mixed in the exhaust gas And make the exhaust gas form a desulfurization step 11 of a desulfurized gas, a pretreatment step 12 of mixing an amino reducing agent in the desulfurized gas and forming the desulfurized gas into a gas to be reduced, and a pretreatment step 12 At the reaction temperature, the gas to be reduced is fed into a plurality of filter tubes with catalysts, and the gas to be reduced is formed into a catalyst step 13 for removing dust and nitrogen oxides of reducing gas.

參閱圖3與圖4，本發明應用陶纖濾管之低溫觸媒脫硝除塵的方法，能以本發明應用陶纖濾管之低溫觸媒脫硝除塵的設備的一裝置實施例執行，該裝置實施例包含一用以執行該脫硫步驟11的脫硫單元2、一連通該脫硫單元2並用以執行該前處理步驟12的前處理單元3，及一連通該前處理單元3並用以執行該觸媒步驟13的觸媒單元4。 Referring to Figures 3 and 4, the low-temperature catalyst denitrification and dust removal method of the present invention using ceramic fiber filter tubes can be implemented by an apparatus embodiment of the low-temperature catalyst denitrification and dust removal equipment using ceramic fiber filter tubes of the present invention. The device embodiment includes a desulfurization unit 2 for performing the desulfurization step 11, a pretreatment unit 3 connected with the desulfurization unit 2 and used for performing the pretreatment step 12, and a pretreatment unit 3 connected with the pretreatment unit 3 and used for The catalyst unit 4 that executes the catalyst step 13.

該脫硫單元2適用於連通一用以產生該廢氣的燃燒單元5，在該脫硫步驟11中，該脫硫單元2適用於在該廢氣中混合脫硫劑，以脫硫劑吸收該廢氣中的硫氧化物(SO_x)，使該廢氣形成該已脫硫氣體。在本實施例中，脫硫劑是選自於石灰石、白雲石、消石灰，或鈣基吸收劑。 The desulfurization unit 2 is adapted to communicate with a combustion unit 5 for generating the exhaust gas. In the desulfurization step 11, the desulfurization unit 2 is adapted to mix a desulfurizing agent in the exhaust gas to absorb the exhaust gas with the desulfurizing agent The sulfur oxides (SO _x ) in the exhaust gas form the desulfurized gas. In this embodiment, the desulfurizing agent is selected from limestone, dolomite, slaked lime, or calcium-based absorbent.

該前處理單元3適用於在該已脫硫氣體中混合氨基還原劑，使該已脫硫氣體形成該待還原氣體。在本實施例中，氨基還原劑是選自於氨氣、尿素，或氨水。 The pretreatment unit 3 is suitable for mixing an amino reducing agent in the desulfurized gas to make the desulfurized gas form the gas to be reduced. In this embodiment, the amino reducing agent is selected from ammonia gas, urea, or ammonia water.

參閱圖3至圖5，該觸媒單元4適用於連通一用以排放該還原氣體的排氣單元6，並包括多個間隔設置且適用於供該待還原氣體通過的濾管41，及一附著於該等濾管41的觸媒42。每一個濾管41具有多個相互交織且可耐受高溫的陶瓷纖維(圖未示)，並形成有一朝向該排氣單元6的開口411。在本實施例中，該觸媒42具有鈦氧化物、釩氧化物、鉬氧化物、鎢氧化物、鎂氧化物及氟化合物，並以含浸法使該觸媒42附著於該等濾管41上，可使該待還原氣體中有毒的氮氧化物(NO_x)與氨(NH₃)進行反應，並將氮氧化物還原成無毒的氮氣(N₂)和水(H₂O)。 3 to 5, the catalyst unit 4 is suitable for communicating with an exhaust unit 6 for discharging the reducing gas, and includes a plurality of filter tubes 41 arranged at intervals and suitable for passing the gas to be reduced, and a The catalyst 42 attached to the filter tubes 41. Each filter tube 41 has a plurality of interwoven ceramic fibers (not shown) that can withstand high temperatures, and an opening 411 facing the exhaust unit 6 is formed. In this embodiment, the catalyst 42 has titanium oxide, vanadium oxide, molybdenum oxide, tungsten oxide, magnesium oxide, and fluorine compound, and the catalyst 42 is attached to the filter tubes 41 by an impregnation method. Above, the poisonous nitrogen oxides (NO _x ) in the gas to be reduced can react with ammonia (NH ₃ ), and the nitrogen oxides can be reduced to non-toxic nitrogen (N ₂ ) and water (H ₂ O).

在實際運作時，該待還原氣體將沿圖5中箭頭所示的方向通過該等濾管41，並自該等開口411向該排氣單元6流動，在此過程中，粉塵將被該等濾管41濾除，氮氧化物則被該觸媒42催化而反應成為氮氣，使得該待還原氣體形成符合環保排放標準的該還原氣體。在本實施例中，該還原氣體為氮氣與水氣。除了粒徑較大的粉塵(懸浮微粒，Particulate Matter，簡稱為PM)，該等濾管41也能同時有效地去除PM_2.5等級的粉塵(粒徑小於或等於2.5微米的懸浮微粒)，在本實施例中，該等濾管41能夠去除80%至99.9%的懸浮微粒，及50%至95%的PM_2.5等級的粉塵。 In actual operation, the gas to be reduced will pass through the filter tubes 41 in the direction indicated by the arrow in FIG. 5, and flow from the openings 411 to the exhaust unit 6. In this process, the dust will be The filter tube 41 filters out, and the nitrogen oxides are catalyzed by the catalyst 42 and reacted into nitrogen, so that the gas to be reduced forms the reducing gas that meets the environmental protection emission standard. In this embodiment, the reducing gas is nitrogen and moisture. In addition to dust with larger particle size (Particulate Matter, PM for short), the filter tubes 41 can also effectively remove PM _2.5 dust (aerosol particles with a particle size less than or equal to 2.5 microns) at the same time. In an embodiment, the filter tubes 41 can remove 80% to 99.9% of suspended particles and 50% to 95% of PM _2.5 dust.

在該觸媒步驟13中，該反應溫度為150℃至250℃。其中，在150℃至200℃時，該觸媒42的脫硝效率為70%至95%，在200℃至225℃時，該觸媒42的脫硝效率可達90%至99%，在225℃至250℃時，該觸媒42的脫硝效率則可達95%至100%。由於該觸媒42的釩氧化物在催化氮氧化物的同時，也會將該待還原氣體中的二氧化硫(SO₂)氧化成三氧化硫(SO₃)，在低於320℃的環境中，三氧化硫容易與氨進行反應，而產生具有黏性的硫酸氫銨(NH₄HSO₄)，硫酸氫銨黏附在該觸媒單元4上時將遮蔽該觸媒單元4，並使該觸媒42失去活性，進而影響該觸媒步驟13中去除氮氧化物的效率。因此，須在該脫硫步驟11中盡量去除該廢氣中的硫氧化物，以避免產生硫酸氫銨。 In the catalyst step 13, the reaction temperature is 150°C to 250°C. Among them, at 150°C to 200°C, the denitration efficiency of the catalyst 42 is 70% to 95%, and at 200°C to 225°C, the denitration efficiency of the catalyst 42 can reach 90% to 99%. At 225°C to 250°C, the denitration efficiency of the catalyst 42 can reach 95% to 100%. Since the vanadium oxide of the catalyst 42 catalyzes nitrogen oxides, it also _{oxidizes sulfur dioxide (SO 2} ) in the gas to be reduced to sulfur trioxide (SO ₃ ). In an environment below 320°C, Sulfur trioxide easily reacts with ammonia to produce viscous ammonium bisulfate (NH ₄ HSO ₄ ). When ammonium bisulfate adheres to the catalyst unit 4, it will shield the catalyst unit 4 and make the catalyst 42 loses activity, which in turn affects the efficiency of removing nitrogen oxides in step 13 of the catalyst. Therefore, the sulfur oxides in the exhaust gas must be removed as much as possible in the desulfurization step 11 to avoid the production of ammonium bisulfate.

在本實施例中，以該觸媒42的總重量為100wt%計，該觸媒42具有重量百分比為80wt%至90wt%的鈦氧化物、重量百分比為1wt%至7wt%的釩氧化物、重量百分比為1wt%至10wt%的鉬氧化物、重量百分比為1wt%至10wt%的鎢氧化物、重量百分比為0.1wt%至5wt%的鎂氧化物，及重量百分比為0.1wt%至5wt%的氟化合物。然而，在實際應用中，該觸媒42也可以只具有鈦氧化物、釩氧化物、鉬氧化物及鎢氧化物，並能依執行需求適當調配該觸媒42的組成物比例，而不以上述比例為限，同樣能達到去除氮氧化物的功效。 In this embodiment, based on the total weight of the catalyst 42 being 100wt%, the catalyst 42 has a weight percentage of 80wt% to 90wt% of titanium oxide, a weight percentage of 1wt% to 7wt% of vanadium oxide, The weight percentage is 1wt% to 10wt% Molybdenum oxide, tungsten oxide with a weight percentage of 1 wt% to 10 wt%, a magnesium oxide with a weight percentage of 0.1 wt% to 5 wt%, and a fluorine compound with a weight percentage of 0.1 wt% to 5 wt%. However, in practical applications, the catalyst 42 can also only have titanium oxide, vanadium oxide, molybdenum oxide, and tungsten oxide, and the composition ratio of the catalyst 42 can be appropriately adjusted according to the implementation requirements, instead of using The above ratio is limited, and it can also achieve the effect of removing nitrogen oxides.

須特別說明的是，本發明應用陶纖濾管之低溫觸媒脫硝除塵的方法也可以僅包含該前處理步驟12及該觸媒步驟13，在該觸媒步驟13中，也可以將該待還原氣體輸入一附有該觸媒42的濾管41。而本發明應用陶纖濾管之低溫觸媒脫硝除塵的設備也可以僅包含該前處理單元3及該觸媒單元4，該觸媒單元4也可以只包括一濾管41及一觸媒42，同樣能去除該廢氣中的粉塵及氮氧化物。 It should be particularly noted that the low-temperature catalyst denitration and dust removal method using ceramic fiber filter tubes of the present invention can also only include the pretreatment step 12 and the catalyst step 13. In the catalyst step 13, the method can also The gas to be reduced is input into a filter tube 41 attached with the catalyst 42. The low-temperature catalyst denitrification and dust removal equipment using ceramic fiber filter tubes of the present invention may also only include the pre-processing unit 3 and the catalyst unit 4, and the catalyst unit 4 may also only include a filter tube 41 and a catalyst. 42. It can also remove dust and nitrogen oxides in the exhaust gas.

綜上所述，本發明應用陶纖濾管之低溫觸媒脫硝除塵的方法及設備藉由能在150℃至250℃的環境裡進行脫硝反應的該觸媒42，並配合以陶瓷纖維製成的該等濾管41，不需要再次加熱經過熱回收的該廢氣，該觸媒單元4即能以良好的效率去除該廢氣中的粉塵及氮氧化物。能降低能源的耗費，並能避免該觸媒單元4受到高溫而損壞，可節省設備成本，故確實能達成本發明之目的。 In summary, the low-temperature catalyst denitration and dust removal method and equipment of the present invention using ceramic fiber filter tubes uses the catalyst 42 capable of performing denitration reaction in an environment of 150°C to 250°C, and is matched with ceramic fiber The fabricated filter tubes 41 do not need to reheat the exhaust gas after heat recovery, and the catalyst unit 4 can remove dust and nitrogen oxides in the exhaust gas with good efficiency. The energy consumption can be reduced, and the catalyst unit 4 can be prevented from being damaged by high temperature, and the equipment cost can be saved. Therefore, the purpose of the cost invention can be achieved.

惟以上所述者，僅為本發明之實施例而已，當不能以此限定本發明實施之範圍，凡是依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。 However, the above are only examples of the present invention, and should not be used to limit the scope of implementation of the present invention. Any application for patents and patent descriptions according to the present invention Simple equivalent changes and modifications made to the content of the book are still within the scope of the patent for the present invention.

11:脫硫步驟 11: Desulfurization step

12:前處理步驟 12: Pre-processing steps

13:觸媒步驟 13: Catalyst step

Claims

一種應用陶纖濾管之低溫觸媒脫硝除塵的方法，適用於去除一廢氣中的粉塵及氮氧化物，並包含下列步驟：一脫硫步驟，在該廢氣中混合脫硫劑，脫硫劑是選自於石灰石、白雲石、消石灰，或鈣基吸收劑，使該廢氣形成一已脫硫氣體；一前處理步驟，在該已脫硫氣體中混合氨基還原劑，使該已脫硫氣體形成一待還原氣體；及一觸媒步驟，在一個為150℃至250℃但不包括250℃的反應溫度下將該待還原氣體輸入至少一附有觸媒的濾管，觸媒具有鈦氧化物、釩氧化物、鉬氧化物及鎢氧化物，使該待還原氣體通過該至少一濾管時，形成一去除粉塵及氮氧化物的還原氣體。 A low-temperature catalyst denitrification and dust removal method using ceramic fiber filter tubes is suitable for removing dust and nitrogen oxides in an exhaust gas, and includes the following steps: a desulfurization step, mixing a desulfurizing agent in the exhaust gas, and desulfurizing The agent is selected from limestone, dolomite, slaked lime, or calcium-based absorbents to make the waste gas form a desulfurized gas; a pretreatment step is to mix an amino reducing agent in the desulfurized gas to make the desulfurized gas The gas forms a gas to be reduced; and a catalyst step. The gas to be reduced is fed into at least one filter tube with a catalyst at a reaction temperature of 150°C to 250°C but not including 250°C. The catalyst has titanium Oxides, vanadium oxides, molybdenum oxides and tungsten oxides form a reducing gas for removing dust and nitrogen oxides when the gas to be reduced passes through the at least one filter tube.

如請求項1所述的應用陶纖濾管之低溫觸媒脫硝除塵的方法，其中，在該觸媒步驟中，觸媒還具有鎂氧化物及氟化合物。 The method for denitration and dust removal using a low-temperature catalyst using a ceramic fiber filter tube according to claim 1, wherein, in the catalyst step, the catalyst further contains magnesium oxide and fluorine compound.

如請求項2所述的應用陶纖濾管之低溫觸媒脫硝除塵的方法，其中，在該觸媒步驟中，以觸媒的總重量為100wt%計，觸媒具有：鈦氧化物，重量百分比為60wt%至90wt%；釩氧化物，重量百分比為0.1wt%至10wt%；鉬氧化物，重量百分比為1wt%至20wt%；鎢氧化物，重量百分比為1wt%至20wt%；鎂氧化物，重量百分比為0.1wt%至10wt%；及氟化合物，重量百分比為0.1wt%至10wt%。 The low-temperature catalyst denitrification and dust removal method using ceramic fiber filter tubes according to claim 2, wherein, in the catalyst step, based on the total weight of the catalyst being 100% by weight, the catalyst has: titanium oxide, Weight percentage is 60wt% to 90wt%; vanadium oxide, weight percentage is 0.1wt% to 10wt%; molybdenum oxide, weight percentage is 1wt% to 20wt%; tungsten oxide, weight percentage is 1wt% to 20wt%; magnesium Oxide, the weight percentage is 0.1wt% to 10wt%; and Fluorine compound, the weight percentage is 0.1wt% to 10wt%.

一種應用陶纖濾管之低溫觸媒脫硝除塵的設備，適用於去除一廢氣中的粉塵及氮氧化物，並包含：一前處理單元，適用於在該廢氣中混合氨基還原劑，使該廢氣形成一待還原氣體；及一觸媒單元，連通該前處理單元，並適用於在一個為150℃至250℃但不包括250℃的反應溫度下運作，該觸媒單元包括至少一適用於供該待還原氣體通過的濾管，及一附著於該至少一濾管的觸媒，該觸媒具有鈦氧化物、釩氧化物、鉬氧化物及鎢氧化物，使該待還原氣體通過該至少一濾管時，形成一去除粉塵及氮氧化物的還原氣體。 A low-temperature catalyst denitrification and dust removal equipment using ceramic fiber filter tubes is suitable for removing dust and nitrogen oxides in an exhaust gas, and includes: a pretreatment unit, which is suitable for mixing an amino reducing agent in the exhaust gas to make the The exhaust gas forms a gas to be reduced; and a catalyst unit connected to the pretreatment unit and suitable for operating at a reaction temperature of 150°C to 250°C but not including 250°C. The catalyst unit includes at least one suitable for A filter tube for the gas to be reduced to pass through, and a catalyst attached to the at least one filter tube, the catalyst having titanium oxide, vanadium oxide, molybdenum oxide, and tungsten oxide, so that the gas to be reduced passes through the When at least one filter tube is used, a reducing gas for removing dust and nitrogen oxides is formed.

一種應用陶纖濾管之低溫觸媒脫硝除塵的設備，適用於去除一廢氣中的粉塵及氮氧化物，並包含：一脫硫單元，適用於在該廢氣中混合脫硫劑，使該廢氣形成一已脫硫氣體；一前處理單元，連通該脫硫單元，並適用於在該已脫硫氣體中混合氨基還原劑，使該已脫硫氣體形成一待還原氣體；及一觸媒單元，連通該前處理單元，並適用於在一個為150℃至250℃但不包括250℃的反應溫度下運作，該觸媒單元包括至少一適用於供該待還原氣體通過的濾管，及一附著於該至少一濾管的觸媒，該觸媒具有鈦氧化物、釩氧化物、鉬氧化物及鎢氧化物，使該待還原氣體通過該至少一濾管時，形成一去除粉塵及氮氧化物的還原氣體。 A low-temperature catalyst denitrification and dust removal equipment using ceramic fiber filter tubes is suitable for removing dust and nitrogen oxides in an exhaust gas, and includes: a desulfurization unit, which is suitable for mixing a desulfurization agent in the exhaust gas to make the The exhaust gas forms a desulfurized gas; a pretreatment unit connected to the desulfurization unit and is suitable for mixing an amino reducing agent in the desulfurized gas to make the desulfurized gas form a gas to be reduced; and a catalyst The unit is connected to the pretreatment unit and is suitable for operating at a reaction temperature of 150°C to 250°C but not including 250°C, the catalyst unit includes at least one filter tube suitable for passing the gas to be reduced, and A catalyst attached to the at least one filter tube, the catalyst having titanium oxide, vanadium oxide, molybdenum oxide, and tungsten oxide, and when the gas to be reduced passes through the at least one filter tube, it forms a dust removal and The reducing gas of nitrogen oxides.

如請求項4或5所述的應用陶纖濾管之低溫觸媒脫硝除塵的設備，其中，該至少一濾管具有複數相互交織的陶瓷纖維。 According to claim 4 or 5, the low-temperature catalyst denitration and dust removal equipment using ceramic fiber filter tubes, wherein the at least one filter tube has a plurality of interwoven ceramic fibers.

如請求項4或5所述的應用陶纖濾管之低溫觸媒脫硝除塵的設備，其中，該觸媒還具有鎂氧化物及氟化合物。 The low-temperature catalyst denitration and dust removal equipment using ceramic fiber filter tubes as described in claim 4 or 5, wherein the catalyst further contains magnesium oxide and fluorine compounds.

如請求項7所述的應用陶纖濾管之低溫觸媒脫硝除塵的設備，其中，以該觸媒的總重量為100wt%計，該觸媒具有：鈦氧化物，重量百分比為60wt%至90wt%；釩氧化物，重量百分比為0.1wt%至10wt%；鉬氧化物，重量百分比為1wt%至20wt%；鎢氧化物，重量百分比為1wt%至20wt%；鎂氧化物，重量百分比為0.1wt%至10wt%；及氟化合物，重量百分比為0.1wt%至10wt%。 The low-temperature catalyst denitrification and dust removal equipment using ceramic fiber filter tube according to claim 7, wherein, based on the total weight of the catalyst as 100wt%, the catalyst has: titanium oxide, the weight percentage is 60wt% To 90wt%; vanadium oxide, weight percentage is 0.1wt% to 10wt%; molybdenum oxide, weight percentage is 1wt% to 20wt%; tungsten oxide, weight percentage is 1wt% to 20wt%; magnesium oxide, weight percentage It is 0.1wt% to 10wt%; and the fluorine compound, the weight percentage is 0.1wt% to 10wt%.