CN203916462U

CN203916462U - Honeycomb catalyst module

Info

Publication number: CN203916462U
Application number: CN201420138772.7U
Authority: CN
Inventors: 成濑和也; 春日贵史; 吉村健
Original assignee: Ibiden Co Ltd
Current assignee: Ibiden Co Ltd
Priority date: 2014-03-25
Filing date: 2014-03-25
Publication date: 2014-11-05
Anticipated expiration: 2024-03-25

Abstract

The utility model provides a kind of honeycomb catalyst module, and it is difficult for producing exhaust gas leakage, and the breakage that is difficult for producing honeycomb catalyst unit.Honeycomb catalyst module of the present utility model, it is characterized in that, across partition, along long side direction, be set side by side with a plurality of through holes that do not seal both ends, and the honeycomb catalyst unit that is formed with periphery wall in periphery is via a plurality of the forming of tapetum fibrosum set consisting of inorfil.

Description

Honeycomb catalyst module

Technical field

The utility model relates to a kind of honeycomb catalyst module.

Background technology

As the method for removing the nitrogen oxide (NOx) in waste gas, known have the reducing agents such as ammonia are mixed in waste gas after importing be equipped with in the denitrification apparatus of honeycomb catalyst, and optionally reduce the method for the NOx in waste gas.As this honeycomb catalyst, for example use the honeycomb catalyst of catalyst-loaded metal on the carrier of flat board dull and stereotyped in alternate configurations and that corrugated sheet forms, corrugated sheet sandwich construction or catalyst material is made to base soil, thereby being shaped to honeycomb catalyst cellular and that burn till by extrusion moulding.

In this denitrification apparatus, in the denitrification apparatus using, in order to process a large amount of waste gas, need to strengthen reaction volume in coal-burning power plant and cement plant etc.In order to strengthen the reaction volume of denitrification apparatus, there is the method for the volume that strengthens honeycomb catalyst.Conventionally, honeycomb catalyst is by a plurality of honeycomb catalyst cell formations, therefore in order to strengthen the volume of honeycomb catalyst, can consider to increase the method for the quantity of honeycomb catalyst unit.But, in the method for the quantity of increase honeycomb catalyst unit, there is the problem of poor operation efficiency while manufacturing denitrification apparatus.Therefore, from the viewpoint of increasing work efficiency, propose to have set a plurality of honeycomb catalysts unit as honeycomb catalyst module, and the method for carrying out the manufacture of denitrification apparatus using honeycomb catalyst module as Yi Ge unit.

As this honeycomb catalyst module, in patent documentation 1, disclose a plurality of honeycomb catalysts unit by 1 above honeycomb catalyst module forming with bundling.

Patent documentation 1: Japanese kokai publication hei 8-215578 communique

Utility model content

When having used the denitrification apparatus of the disclosed honeycomb catalyst module of patent documentation 1 to purify NOx, honeycomb catalyst unit is exposed in high temperature.Therefore, honeycomb catalyst unit carries out thermal expansion and thermal contraction repeatedly.By consequent thermal stress, may be damaged by the band that honeycomb catalyst is unit-modularized, or honeycomb catalyst unit may produce gap each other.The reason that the breakage of band or gap each other, honeycomb catalyst unit become exhaust gas leakage.

In addition, by honeycomb catalyst unit, repeatedly carry out thermal expansion and thermal contraction, thereby adjacent honeycomb catalyst unit repeatedly contacts each other and deviates from, and produces sometimes the breakage of honeycomb catalyst unit itself.

The utility model completes in view of above-mentioned problem, the damaged honeycomb catalyst module that its object is to provide a kind of difficult generation exhaust gas leakage and is difficult for producing honeycomb catalyst unit.

In order to solve above-mentioned problem, the result that the inventor etc. further investigate repeatedly, finds to be clipped in each honeycomb catalyst unit each other by having flexible tapetum fibrosum, thereby is difficult for producing Leakage Gas, and the breakage that is difficult for producing honeycomb catalyst unit, has completed the utility model thus.

; honeycomb catalyst module of the present utility model; wherein, across partition, along long side direction, be set side by side with the through hole at a plurality of unsealings both ends, and the honeycomb catalyst unit that is formed with periphery wall in periphery is via a plurality of the forming of tapetum fibrosum set consisting of inorfil.

In honeycomb catalyst of the present utility model unit, honeycomb catalyst unit is via a plurality of the forming of tapetum fibrosum set consisting of inorfil.

The tapetum fibrosum consisting of inorfil has elasticity.Therefore, when existing from outside pressure, tapetum fibrosum can shrink, and when the pressure from outside disappears, tapetum fibrosum can recover original size.

Therefore,, when honeycomb catalyst unit carries out thermal expansion, tapetum fibrosum shrinks, and can absorb thus its thermally expanded volume.And when honeycomb catalyst unit carries out thermal contraction, tapetum fibrosum recovers original size, and can occupy its part of thermal contraction.Therefore, can prevent that each honeycomb catalyst unit from producing gap each other.Can prevent exhaust gas leakage thus.

In addition, between adjacent honeycomb catalyst unit, there is tapetum fibrosum, can prevent that thus adjacent honeycomb catalyst unit is each other because thermal expansion etc. repeatedly contacts and deviates from.Therefore, can prevent that honeycomb catalyst unit is damaged.

In honeycomb catalyst module of the present utility model, above-mentioned tapetum fibrosum is preferably divided at least 2 above parts.

If tapetum fibrosum is divided at least 2 above parts, while manufacturing honeycomb catalyst module, can effectively configure in required part the tapetum fibrosum of required size.Operating efficiency while therefore, manufacturing honeycomb catalyst module improves.

This uses in novel honeycomb catalyst module, the both ends of the side of the above-mentioned honeycomb catalyst unit of above-mentioned tapetum fibrosum preferred disposition on above-mentioned long side direction.

Conventionally, while utilizing honeycomb catalytic unit by honeycomb catalyst module to carry out the NOx of purifying exhaust air, waste gas flows into from a side end of the long side direction of through hole, from the end outflow of the long side direction of the through hole of opposite side.

When tapetum fibrosum is not disposed at the both ends of side, honeycomb catalyst unit, waste gas can not flow into through hole and easily flow into honeycomb catalyst unit each other.

But as said structure, if tapetum fibrosum is disposed at the both ends of side, honeycomb catalyst unit, even if waste gas wants to flow into honeycomb catalyst unit each other, waste gas also can be blocked by tapetum fibrosum.

In honeycomb catalyst module of the present utility model, the tapetum fibrosum that is disposed at a side end of side, above-mentioned honeycomb catalyst unit is preferably different parts with the tapetum fibrosum that is disposed at the opposite side end face of side, above-mentioned honeycomb catalyst unit.

In the honeycomb catalyst module of this structure, as the tapetum fibrosum of different parts, be disposed at respectively the end of side, honeycomb catalyst unit, therefore can reduce the quantity of tapetum fibrosum.Therefore, can reduce the cost of honeycomb catalyst module.

In honeycomb catalyst module of the present utility model, the rectangle that the length that is shaped as a limit in the cross section vertical with above-mentioned long side direction of preferred above-mentioned honeycomb catalyst unit is 140～160mm.

If honeycomb catalyst unit has above-mentioned cross sectional shape, can not make the purifying property of NOx reduce, or cause the pressure loss to rise, and can manufacture honeycomb catalyst module.

In honeycomb catalyst module of the present utility model, the thickness of preferred above-mentioned partition is 0.05～2.5mm.

If the thickness of partition is less than 0.05mm, the intensity of honeycomb catalyst unit is insufficient.On the other hand, if the thickness of partition surpasses 2.5mm, waste gas is difficult to be immersed into the inside of partition, so the purifying property of NOx declines.

In honeycomb catalyst module of the present utility model, the thickness of preferred above-mentioned periphery wall is 0.05～3.0mm.

If the thickness of periphery wall is less than 0.05mm, as during assembling honeycomb catalyst unit etc. because of easily breakage of the power from outside.On the other hand, if the thickness of periphery wall surpasses 3.0mm, periphery wall is yielding during honeycomb moulding.

In honeycomb catalyst module of the present utility model, the spacing of preferred above-mentioned through hole is 0.8～19mm.

When the cross sectional shape of honeycomb catalyst unit and the constant thickness of partition, if the spacing of through hole is less than 0.8mm, because the size of through hole is less, while therefore using in the waste gas that contains a large amount of ash contents in coal-burning power plant and cement plant etc., cause stopping up through hole, and the purifying property of NOx declines.On the other hand, if the spacing of through hole surpasses 19mm, because the size of through hole is larger, and honeycomb catalyst unit is difficult for contacting with waste gas, so the decline of the purifying property of NOx.

In addition, the spacing of through hole refers to the cross section vertical with long side direction in honeycomb catalyst unit, the distance between through hole and the central point of adjacent through hole.

In honeycomb catalyst module of the present utility model, the average pore footpath of preferred above-mentioned honeycomb catalyst unit is 0.01～0.5 μ m.

If the average pore footpath of honeycomb catalyst unit is less than 0.01 μ m, due to waste gas, be difficult for being immersed into the inside of partition, so the purifying property of NOx declines.On the other hand, if the average pore footpath of honeycomb catalyst unit surpasses 0.5 μ m, in pore, can pile up ash content, and the purifying property of NOx declines.

In honeycomb catalyst module of the present utility model, preferred above-mentioned honeycomb catalyst unit consists of titanium oxide, barium oxide and tungsten oxide.

In honeycomb catalyst module of the present utility model, the length that is shaped as long limit in the cross section vertical with above-mentioned long side direction of preferred above-mentioned honeycomb catalyst module is 1800～2000mm, the rectangle that the length of minor face is 900～1000mm.

If the honeycomb catalyst module of above-mentioned size,, when transmission, setting, replacing etc., honeycomb catalyst module is easily fully processed.And, can, by the setting tools such as shell fixed cellular catalyst elements fully, therefore be difficult for producing coming off of honeycomb catalyst unit.

Conventionally, the honeycomb catalyst unit that forms honeycomb catalyst module is by shell or hold the setting tools such as framework and fix.This setting tool is due to the intensity of the unlikely damaged degree of needs, even therefore in the situation that honeycomb catalyst module is less, also needs size to a certain degree.

Therefore, if the size of honeycomb catalyst module diminishes, the shared ratio of setting tool increases, and the shared ratio in honeycomb catalyst unit diminishes.

According to this reason, length on above-mentioned long limit is less than 1800mm, or the length of above-mentioned minor face is less than in the honeycomb catalyst module of 900mm, with the length on above-mentioned long limit be 1800～2000mm, and the honeycomb catalyst module that the length of above-mentioned minor face is 900～1000mm is compared, the shared ratio of setting tool increases.Therefore, use the length on above-mentioned long limit to be less than 1800mm, or the length of above-mentioned minor face is less than in the denitrification apparatus of honeycomb catalyst module of 900mm, the reaction efficiency of removing the NOx in the waste gas of per unit volume reduces, and the pressure loss also increases.In addition, because the quantity of the setting tool of the per unit volume of honeycomb catalyst module increases, while therefore producing honeycomb catalyst module in batches, the cost of setting tool increases.

When the length on above-mentioned long limit surpasses 2000mm, or the length of above-mentioned minor face is while surpassing 1000mm, and honeycomb catalyst module becomes excessive.Therefore the honeycomb catalyst unit that, approaches the central portion of honeycomb catalyst module easily comes off from honeycomb catalyst module.

And this honeycomb catalyst module is difficult to process when transmission, setting, replacing etc.

Preferred honeycomb catalyst module of the present utility model is for the exhaust-gas treatment in coal-burning power plant or cement plant.

If use honeycomb catalyst module of the present utility model, can effectively purify the NOx from the waste gas that contains a large amount of ash contents of coal-burning power plant or cement plant discharge.

Accompanying drawing explanation

Fig. 1 is for schematically representing the stereogram of an example of honeycomb catalyst module of the present utility model.

In Fig. 2, Fig. 2 (a) is the stereogram of an example that schematically represent to form the honeycomb catalyst unit of honeycomb catalyst module of the present utility model, and Fig. 2 (b) is the B-B line cutaway view of the honeycomb catalyst unit shown in Fig. 2 (a).

Fig. 3 is for having amplified the stereogram of the end of the honeycomb catalyst unit shown in Fig. 2 (a) and Fig. 2 (b).

Fig. 4 is disposed at the stereogram of an example of a side end of honeycomb catalyst unit of the end of side, honeycomb catalyst unit for schematically represent forming the tapetum fibrosum of honeycomb catalyst module of the present utility model.

Fig. 5 is the A-A line cutaway view of the honeycomb catalyst module shown in Fig. 1.

In Fig. 6, Fig. 6 (a)～(e) is for schematically representing to assemble the figure of an example of the operation of honeycomb catalyst module of the present utility model with process sequence.

In figure: 10-honeycomb catalyst unit, 11-through hole, 12-partition, 13-periphery wall, 14, the end of 15-honeycomb catalyst unit, the end of side, 16-honeycomb catalyst unit, 17-horizontal part, 18-vertical component effect, 20-tapetum fibrosum, 21-horizontal part, 22-vertical member, 30-fixed part, 31-plate-shaped member, 40-aggregate, 100-honeycomb catalyst module.

The specific embodiment

Below, specifically describe the utility model.Yet the utility model is not limited to following record, can appropriate change in the scope that does not change aim of the present utility model and be suitable for.

Honeycomb catalyst module of the present utility model, wherein, across partition, along long side direction, be set side by side with the through hole at a plurality of unsealings both ends, and the honeycomb catalyst unit that is formed with periphery wall in periphery is via a plurality of the forming of tapetum fibrosum set consisting of inorfil.

In honeycomb catalyst module 100 shown in Fig. 1, honeycomb catalyst unit 10 is a plurality of and forms aggregate 40 via tapetum fibrosum 20 set consisting of inorfil, and aggregate 40 is fixed to be contained in the mode of inside of setting tool 30 of the periphery of formation honeycomb catalyst module 100.

Setting tool 30 consists of a plurality of plate-shaped members 31, and a plurality of plate-shaped members 31 form the periphery of honeycomb catalyst module 100.

First, be conceived to honeycomb catalyst unit 10 and tapetum fibrosum 20 and the effect of honeycomb catalyst module 100 of the present utility model is described.

As shown in Figure 1, in honeycomb catalyst module 100 of the present utility model, honeycomb catalyst unit 10 has a plurality of via tapetum fibrosum 20 set.

The tapetum fibrosum 20 consisting of inorfil has elasticity.Therefore, when existing from outside pressure, tapetum fibrosum 20 can shrink, and when the pressure from outside disappears, tapetum fibrosum 20 can recover original size.

In addition, during NOx in removing waste gas, honeycomb catalyst unit 10 is exposed in high-temp waste gas, and detailed content will be carried out aftermentioned.Therefore, honeycomb catalyst unit 10 carries out thermal expansion.Even while there is the thermal expansion of this honeycomb catalyst unit 10, tapetum fibrosum 20 can shrink, and can absorb thus its thermally expanded volume.And when honeycomb catalyst unit 10 has shunk, tapetum fibrosum 20 recovers original size, and can occupy its part of thermal contraction.Therefore,, in honeycomb catalyst module 100, can prevent from producing each other gap in each honeycomb catalyst unit 10.Can prevent exhaust gas leakage thus.

In addition, between adjacent honeycomb catalyst unit 10, there is tapetum fibrosum 20, can prevent that thus adjacent honeycomb catalyst unit 10 is each other because thermal expansion etc. repeatedly contacts and deviates from.Therefore, can prevent 10 breakages of honeycomb catalyst unit.

In this manual, " honeycomb catalyst unit forms via tapetum fibrosum set is a plurality of " refers to, in aggregate 40, adjacent honeycomb catalyst unit 10 at least a portion each other exists tapetum fibrosum 20.

Then, to forming the honeycomb catalyst unit 10 of honeycomb catalyst module 100 of the present utility model, be elaborated.

Fig. 2 (a) is the stereogram of an example that schematically represent to form the honeycomb catalyst unit of honeycomb catalyst module of the present utility model, and Fig. 2 (b) is the B-B line cutaway view of the honeycomb catalyst unit shown in Fig. 2 (a).

Honeycomb catalyst unit 10 shown in Fig. 2 (a) and Fig. 2 (b) is following single unit, across partition 12, along long side direction (being the direction of arrow a in Fig. 2 (a)), be set side by side with the through hole 11 at a plurality of unsealings both ends, and be formed with periphery wall 13 in periphery.

Therefore, in waste gas G(Fig. 2 (b) from arbitrary through hole 11 of a side end (waste gas inflow side end) 14 inflow honeycomb catalyst unit 10, with G, represent waste gas, with arrow, represent flowing of waste gas) when by this through hole 11, contact with catalytic species, in waste gas G, contained NOx is cleaned thus.In addition, the waste gas G purifying discharges from the end side (waste gas outflow side end) 15 of through hole 11.

So, by using honeycomb catalyst unit 10, the suitably NOx in purifying exhaust air.

Preferably honeycomb catalyst unit is shaped as quadrangular shape.Particularly, the shape in the cross section vertical with long side direction of honeycomb catalyst unit is preferably the rectangle that the length on a limit is 140～160mm, and the square that preferably length on a limit is 140～160mm.

In addition, in this description, " rectangle " is the concept that comprises square, can be entirely rectangle, also can be roughly rectangle.For example, can be also the rectangle of the rounded chamfering in bight.

Form in the honeycomb catalyst unit of honeycomb catalyst module of the present utility model, as the shape of through hole, be preferably quadrangular shape, but also can be triangular prism shape, hexa-prism etc.That is,, as the shape of the through hole on the cross section vertical with long side direction of honeycomb catalyst unit, can, for rectangle, triangle, hexagon etc., be preferably square.

Fig. 3 is the stereogram that has amplified the end of the honeycomb catalyst unit shown in Fig. 2 (a) and Fig. 2 (b).

The thickness of partition that forms the honeycomb catalyst unit of honeycomb catalyst module of the present utility model is preferably 0.05～2.5mm.

If the thickness of partition is less than 0.05mm, the intensity of honeycomb catalyst unit is insufficient.On the other hand, if the thickness of partition surpasses 2.5mm, due to waste gas, be difficult to be immersed into the inside of partition, so NOx purifying property declines.

In addition, the thickness of partition refers to, on the cross section vertical with long side direction of honeycomb catalyst unit, forms the shortest length in the length between the inner side of partition of the inner side of partition of the through hole through hole adjacent with formation and (in Fig. 3, uses t _ithe length representing).

The thickness of periphery wall that forms the honeycomb catalyst unit of honeycomb catalyst module of the present utility model is preferably 0.05～3.0mm.

If the thickness of periphery wall is less than 0.05mm, while assembling honeycomb catalyst unit etc., because of the power cracky from outside.On the other hand, if the thickness of periphery wall surpasses 3.0mm, periphery wall is yielding during honeycomb moulding.

In addition, the thickness of periphery wall refers to, on the cross section vertical with long side direction of honeycomb catalyst unit, form length the shortest in the inner side of partition of the outermost through hole of honeycomb catalyst unit and the length between the periphery of honeycomb catalyst unit and (in Fig. 3, use t _othe length representing).

The spacing of through hole that forms the honeycomb catalyst unit of honeycomb catalyst module of the present utility model is preferably 0.8～19mm.

In addition, the spacing of through hole refers to, on the cross section vertical with long side direction of honeycomb catalyst unit, the central point of through hole and adjacent through hole (in Fig. 3, the central point c of through hole 11a _acentral point c with through hole 11b _b) between distance (representing length with p in Fig. 3).

In addition, when through hole be shaped as rectangle or when square, the central point that cornerwise intersection point of take is through hole is obtained the spacing of through hole.Through hole be shaped as triangle or hexagon time, the central point that the center of gravity of through hole of take is through hole.

The average pore footpath that forms the honeycomb catalyst unit of honeycomb catalyst module of the present utility model is preferably 0.01～0.5 μ m.

If the average pore footpath of honeycomb catalyst unit is less than 0.01 μ m, due to waste gas, be difficult for being immersed into the inside of partition, so NOx purifying property declines.On the other hand, if the average pore footpath of honeycomb catalyst unit surpasses 0.5 μ m, in pore, can pile up ash content, and the purifying property of NOx declines.

In addition, the average pore footpath of honeycomb catalyst unit can utilize mercury penetration method to measure.Now the contact angle determination of mercury is 130 °, and surface tension test is 485.25mN/m.

The porosity that forms the honeycomb catalyst unit of honeycomb catalyst module of the present utility model is preferably 30～60%.If the porosity of honeycomb catalyst unit is less than 30%, waste gas is difficult for being immersed into the inside of partition, so NOx purifying property declines.On the other hand, if the porosity of honeycomb catalyst unit surpasses 60%, the intensity of honeycomb catalyst unit is insufficient.

In addition, the porosity of honeycomb catalyst unit can adopt Archimedes method to measure.

Form in the honeycomb catalyst unit of honeycomb catalyst module of the present utility model, preferably the aperture opening ratio in the cross section vertical with long side direction is 50～75%.If the aperture opening ratio in the cross section vertical with long side direction of honeycomb catalyst unit is less than 50%, NOx purifying property declines.On the other hand, if the aperture opening ratio in the cross section vertical with long side direction of honeycomb catalyst unit surpasses 75%, the intensity of honeycomb catalyst unit is insufficient.

The length of long side direction that forms the honeycomb catalyst unit of honeycomb catalyst module of the present utility model is preferably 300～1500mm.

If honeycomb catalyst unit has above-mentioned length, save spatiality excellence.

The density that forms the through hole on the cross section vertical with long side direction of this honeycomb catalyst unit that uses novel honeycomb catalyst module is preferably 0.28～2.2/cm ².

If the density of through hole is less than 0.28/cm ², because honeycomb catalyst unit and waste gas are difficult for contacting, so NOx purifying property declines.On the other hand, if the density of through hole surpasses 2.2/cm ², cause ash content to stop up through hole, and purifying property declines.

The honeycomb catalyst unit that preferably forms honeycomb catalyst module of the present utility model consists of titanium oxide, barium oxide and tungsten oxide.

As titanium oxide, can enumerate titanium dioxide (TiO ₂).As TiO ₂can enumerate Detitanium-ore-type, rutile-type, amorphous or their mixture, especially preferably Detitanium-ore-type TiO ₂.

As barium oxide, can enumerate vanadium pentoxide (V ₂o ₅).

As tungsten oxide, can enumerate tungstic acid (WO ₃).

When honeycomb catalyst unit consists of titanium oxide, barium oxide and tungsten oxide, honeycomb catalyst unit is more preferably at TiO ₂on support V ₂o ₅and WO ₃catalyst (be also called below " TiO ₂/ V ₂o ₅/ WO ₃catalyst ").

Honeycomb catalyst unit is TiO ₂/ V ₂o ₅/ WO ₃during catalyst, the mol ratio of vanadium atom and tungsten atom (W/V) is preferably 0.5～5.0, and more preferably 0.7～4.0, more preferably 0.8～3.0.By W/V mol ratio is made as to 0.5～5.0, can improve initial NOx purifying property and heat durability.

The honeycomb catalyst unit that forms honeycomb catalyst module of the present utility model further preferably consists of inorganic bond.

As the inorganic bond that forms honeycomb catalyst unit, be not particularly limited, but from maintaining the viewpoint of intensity, as suitable adhesive, enumerate the solids content comprising in alumina sol, silicon dioxide gel, TiO 2 sol, waterglass, sepiolite, attapulgite, bentonite, boehmite etc., also can be used in combination of two or more.

The content that forms the inorganic bond in the honeycomb catalyst unit of honeycomb catalyst module of the present utility model is preferably 3～30 quality % in honeycomb catalyst unit, more preferably 5～20 quality %.If the content of inorganic bond is less than 3 quality %, the strength decreased of honeycomb catalyst unit.On the other hand, if the content of inorganic bond surpasses 30 quality %, while manufacturing honeycomb catalyst unit, be difficult to extrusion molding.

Form the honeycomb catalyst unit of honeycomb catalyst module of the present utility model in order to improve intensity, further preferably by being selected from more than one in inorfil, flakey material, four pin shape materials and three-dimensional acicular substance, form.

Preferably the inorfil of formation honeycomb catalyst unit is selected from more than one in aluminium oxide, silica, carborundum, silica-alumina, glass, wollastonite, potassium titanate and aluminium borate, above-mentioned flakey material is selected from more than one in glass, white mica, aluminium oxide and silica, above-mentioned four pin shape materials are zinc oxide, and above-mentioned three-dimensional acicular substance is selected from more than one in aluminium oxide, silica, carborundum, silica-alumina, glass, wollastonite, potassium titanate, aluminium borate and boehmite.

This be because, heat resistance is all higher, even while using as the catalyst carrier in SCR system,

Loss in smelting etc. can be do not produced, the effect as reinforcing agent can be continued yet.

The content of inorfil, flakey material, four pin shape materials and three-dimensional acicular substance is preferably 3～50 quality % in honeycomb catalyst unit, more preferably 3～30 quality %, more preferably 5～20 quality %.If the content of inorfil, flakey material, four pin shape materials and three-dimensional acicular substance is less than 3 quality %, the effect that improves the intensity of honeycomb catalyst unit diminishes.On the other hand, if the content of inorfil, flakey material, four pin shape materials and three-dimensional acicular substance surpasses 50 quality %, the content of the catalytic species in honeycomb catalyst unit reduces, and NOx purifying property declines.

Then, to forming the tapetum fibrosum of honeycomb catalyst module of the present utility model, describe.

As shown in Figure 4, tapetum fibrosum 20 is disposed on the end 16 of 10 sides, honeycomb catalyst unit on long side direction.

In this description, " side of honeycomb catalyst unit " refers to the outer peripheral face of the honeycomb catalyst unit that does not form through hole.

And, in this description, " end of the side of honeycomb catalyst unit " refers to, end on the long side direction of the side of above-mentioned honeycomb catalyst unit, and the terminal part of the long side direction from the side of above-mentioned honeycomb catalyst unit is till the region of the distance of the length 1/3 of the long side direction of honeycomb catalyst unit.

To being disposed at the tapetum fibrosum 20 of end 16 of the side of honeycomb catalyst unit 10, be elaborated.

As shown in Figure 4, the end 16 of the side 10 of honeycomb catalyst unit consists of horizontal part 17 and vertical component effect 18.Horizontal part 17 become when honeycomb catalyst unit 10 is rested on horizontal stand honeycomb catalyst unit side end 16 above and the part of bottom surface.Vertical component effect 18 becomes the part of the face vertical with horizontal direction of end 16 of the side of honeycomb catalyst unit 10 when honeycomb catalyst unit 10 is rested on horizontal stand.

As shown in Figure 4, tapetum fibrosum 20 is divided into horizontal part 21 and vertical member 22, and horizontal part 21 is disposed at horizontal part 17, and vertical member 22 is disposed at vertical component effect 18.

In addition, though not shown, in the end 16' of the opposing party side of honeycomb catalyst unit 10, dispose too and the tapetum fibrosum 20' of tapetum fibrosum 20 for different parts.In the following description, in the situation that distinguish without end 16 and the 16' to side, both side ends unification is recited as to " both ends 16 of the side of honeycomb catalyst unit 10 ".And, without tapetum fibrosum 20 and tapetum fibrosum 20' are distinguished in the situation that, two tapetum fibrosums are united and are only recited as " tapetum fibrosum 20 ".

And, in honeycomb catalyst 100 integral body, each honeycomb catalyst unit 10 and the position relationship of tapetum fibrosum 20 being described, tapetum fibrosum 20 is clipped between the opposed side of each honeycomb catalyst unit 10.

In honeycomb catalyst module 100, tapetum fibrosum 20 is disposed at the both ends 16 of the side of the honeycomb catalyst unit 10 on long side direction.

Conventionally, while utilizing honeycomb catalyst device by honeycomb catalyst module to carry out the NOx of purifying exhaust air, waste gas flows into from a side end of the long side direction of through hole, from the end outflow of the long side direction of opposite side through hole.

Tapetum fibrosum is not disposed in the situation at both ends of side of honeycomb catalyst unit, and waste gas can not flow into through hole, and easily flow into honeycomb catalyst unit each other.

But, if be disposed at the both ends 16 of the side of honeycomb catalyst unit 10 as the tapetum fibrosum 20 of said structure, even if waste gas wants to flow into honeycomb catalyst unit each other, also can be by tapetum fibrosum 20 blocking-up waste gas.

In addition, optimum fiber blanket 20 is configured to cover the terminal part of long side direction on the side of honeycomb catalyst unit 10 in the end 16 of side of honeycomb catalyst unit 10.

In addition, tapetum fibrosum 20 is divided into horizontal part 21 and vertical member 22, therefore, when manufacturing honeycomb catalyst module 100, can effectively configure the tapetum fibrosum 20 of required size in required part.Operating efficiency while therefore, manufacturing honeycomb catalyst module 100 improves.

In honeycomb catalyst module 100, the tapetum fibrosum 20 that is disposed at a side end 16 of side, honeycomb catalyst unit is different parts with the tapetum fibrosum 20' that is disposed at the end side 16' of side, honeycomb catalyst unit.Therefore,, by cover the whole side of honeycomb catalyst unit 10 with tapetum fibrosum, can reduce the cost of honeycomb catalyst module 100.

Above-mentioned tapetum fibrosum 20 is divided into horizontal part 21 and vertical member 22, but the tapetum fibrosum that forms honeycomb catalyst module of the present utility model also can consist of 1 parts.Now, tapetum fibrosum is wound in the side of honeycomb catalyst unit.

In addition, in above-mentioned explanation, tapetum fibrosum 20 and tapetum fibrosum 20' are different parts, but form in the tapetum fibrosum of honeycomb catalyst module of the present utility model, also can consist of continuous parts.In addition, tapetum fibrosum that also can configuration consists of different parts between tapetum fibrosum 20 and tapetum fibrosum 20'.

In above-mentioned honeycomb catalyst unit 10, tapetum fibrosum 20 is disposed at the both ends 16 of the side of honeycomb catalyst unit 10, but in honeycomb catalyst module of the present utility model, tapetum fibrosum also can only be disposed at a side end of the side of honeycomb catalyst unit, part beyond the both ends of the side that also can be configured to comprise honeycomb catalyst unit, also can only be disposed at the part beyond the both ends of side of honeycomb catalyst unit in addition.

, there is the part that does not dispose tapetum fibrosum 20 in the side of above-mentioned honeycomb catalyst unit 10, but in honeycomb catalyst module of the present utility model, can be at the whole side configuration tapetum fibrosum of honeycomb catalyst unit.

Above-mentioned honeycomb catalyst unit 10 tapetum fibrosum is each other one deck, can be for more than 2 layers but form honeycomb catalyst of the present utility model unit tapetum fibrosum each other.

The thickness of tapetum fibrosum is not particularly limited, but is preferably 5～30mm.

If the thickness of tapetum fibrosum is less than 5mm, the intensity of tapetum fibrosum is insufficient.On the other hand.If the thickness of tapetum fibrosum surpasses 30mm,, on the cross section vertical with long side direction of the end of the side of honeycomb catalyst module, the shared ratio of tapetum fibrosum increases, and the shared ratio in honeycomb catalyst unit diminishes.Therefore, the reaction efficiency of the NOx in the waste gas of the per unit volume of removal denitrification apparatus reduces.

As the inorfil that forms tapetum fibrosum, be not particularly limited, but preferably by least one being selected from alumina fibre, silicon dioxide fibre, alumina silica fiber, mullite fiber, biological dissolution fiber and glass fibre, formed.

Therefore when inorfil is alumina fibre, due to excellent heat resistance, even in the situation that being exposed to high temperature, can not produce rottenly etc. yet, therefore especially be suitable as and be equipped on honeycomb catalyst unit tapetum fibrosum each other.

In alumina fibre, except aluminium oxide, can also comprise additives such as calcium oxide, magnesia, zirconia.

Ratio of components as alumina silica fiber, is preferably Al in weight ratio ₂o ₃: SiO ₂=60:40～80:20, more preferably Al ₂o ₃: SiO ₂=70:30～74:26.

The average fiber length of inorfil is not particularly limited, and is preferably 0.05～150mm, more preferably 0.35～100mm.

The fiber diameter of inorfil is not particularly limited, and from the intensity of tapetum fibrosum and the viewpoint of flexibility, is preferably 1～20 μ m, more preferably 1～10 μ m.

Then, the size of honeycomb catalyst module of the present utility model is described.

In addition, as shown in Figure 5, the cross section vertical with long side direction of honeycomb catalyst module 100 be shaped as the rectangle being formed by long limit L and minor face S.

In honeycomb catalyst module of the present utility model, the length of long limit L and minor face S is not particularly limited, but preferably the length of long limit L is 1800～2000mm, and the length of minor face S is 900～1000mm.

If the honeycomb catalyst module of this size,, when transmission, setting, replacing etc., honeycomb catalyst module is easily fully processed.And, can pass through setting tool fixed cellular catalyst elements fully, be therefore difficult for producing coming off of honeycomb catalyst unit.

And a plurality of honeycomb catalysts unit that forms honeycomb catalyst module is fixed by setting tool.Setting tool is due to the intensity of the unlikely damaged degree of needs, even therefore in the situation that honeycomb catalyst module is less, also needs size to a certain degree.

According to this reason, length at long limit L is less than 1800mm, or the length of minor face S is less than in the honeycomb catalyst module of 900mm, with the length of long limit L be 1800～2000mm, and the honeycomb catalyst module that the length of minor face S is 900～1000mm is compared, the shared ratio of setting tool increases.Therefore, use the length of long limit L to be less than 1800mm, or the length of minor face S is less than in the denitrification apparatus of honeycomb catalyst module of 900mm, the reaction efficiency of removing the NOx in the waste gas of per unit volume reduces, and the pressure loss also increases.In addition, because the quantity of the setting tool of the per unit volume of honeycomb catalyst module increases, while therefore producing honeycomb catalyst module in batches, the cost of setting tool increases.

And when the length of long limit L surpasses 2000mm, or the length of minor face S is while surpassing 1000mm, honeycomb catalyst module becomes excessive.Therefore the honeycomb catalyst unit that, approaches the central portion of honeycomb catalyst module easily comes off from honeycomb catalyst module.

This honeycomb catalyst module is difficult to process when transmission, setting, replacing etc.

Then, to forming the setting tool of honeycomb catalyst module of the present utility model, describe.

As above-mentioned, setting tool 30 consists of a plurality of plate-shaped members 31.As long as can fix a plurality of honeycomb catalysts unit 10, a plurality of plate-shaped members 31 connect in any case all can, can be also connection by welding or by the connection of screw thread etc.

In addition, as long as form the setting tool of honeycomb catalyst module of the present utility model, can fix a plurality of honeycomb catalysts unit, can be any shape.As this setting tool, can enumerate the shell of band or tubular etc.

The constituent material of setting tool is not particularly limited, but is preferably iron, iron and steel or stainless steel.

Then, the using method of honeycomb catalyst module of the present utility model is described.

Honeycomb catalyst module of the present utility model is preferably used in the exhaust-gas treatment in coal-burning power plant or cement plant.

If use honeycomb catalyst module of the present utility model, can effectively purify the NOx from the waste gas that contains in a large number ash content of coal-burning power plant or cement plant discharge.

While using honeycomb catalyst module of the present utility model, common honeycomb catalyst module of the present utility model is configured a plurality of in the inside of denitrification apparatus side by side.In denitrification apparatus, waste gas is transported to honeycomb catalyst module of the present utility model.The waste gas of having carried is by forming the through hole of the honeycomb catalyst unit of honeycomb catalyst module of the present utility model.Thus, the NOx in can purifying exhaust air.

The method that waste gas is delivered to honeycomb catalyst module is not particularly limited, and can carry with fan etc., and the mode that also can uprise with the pressure of waste gas designs denitrification apparatus and makes waste gas naturally be transported to honeycomb catalyst module.

Then, an example of the manufacture method of honeycomb catalyst module of the present utility model is described.

First, to forming the manufacture method of the honeycomb catalyst unit of honeycomb catalyst module of the present utility model, describe.

The manufacture method of honeycomb catalyst unit comprises following operation: mixed processes, and mixed with titanium oxide, vanadium raw materials and tungsten raw material are made feedstock composition; Molding procedure is the cellular honeycomb formed article of making by above-mentioned raw materials composition molding; And firing process, burn till above-mentioned honeycomb formed article, and comprise as required other operations.

Below, each operation is described.

In mixed processes, to titanium oxide, vanadium raw materials and tungsten raw material, inorganic bond as required, being further selected from as required more than one in inorfil, flakey material, four pin shape materials and three-dimensional acicular substance mixes/mixingly carry out raw materials composition (also referred to as former slip).

As titanium oxide, preferably use the anatase titanium dioxide (TiO that specific area is high ₂).

As vanadium raw materials, can enumerate ammonium metavanadate, sodium metavanadate, potassium metavanadate, oxalic acid vanadyl and acetic acid vanadyl etc., wherein, from easy to handle angle, preferred ammonium metavanadate.Ammonium metavanadate (NH ₄vO ₃) pass through NH ₄vO ₃→ V ₂o ₅+ 2NH ₃+ H ₂the such decomposition reaction of O generates V ₂o ₅, and bring into play the effect of the catalyst in SCR system.

As tungsten raw material, can enumerate ammonium metatungstate, tungstic acid (WO ₃) and ammonium paratungstate etc., wherein, preferred ammonium metatungstate.

The inorganic bond that forms feedstock composition is identical with the inorganic bond that forms already described honeycomb catalyst unit.

In addition, in feedstock composition, can suitably add as required organic bond, decentralized medium, shaping assistant and pH adjusting agent etc.

As organic bond, be not particularly limited, can enumerate methylcellulose, carboxymethyl cellulose, hydroxyethylcellulose, polyethylene glycol, phenolic resin and epoxy resin etc., also can be used in combination of two or more.In addition, the addition of organic bond is 1～10 quality % with respect to the gross mass of titanium oxide, barium oxide, tungsten oxide, inorganic bond, inorfil, flakey material, four pin shape materials and three-dimensional acicular substance.

As decentralized medium, be not particularly limited, can enumerate the organic solvents such as water, benzene, the alcohol such as methyl alcohol etc., also can be used in combination of two or more.

As shaping assistant, be not particularly limited, can enumerate ethylene glycol, dextrin, aliphatic acid, fatty acid soaps and polyalcohol etc., also can be used in combination of two or more.

As pH adjusting agent, can enumerate ammoniacal liquor, amines etc., can be used in combination of two or more.

During raw materials composition, preferably carry out mixed milling, also can use mixer, grater etc. to mix, also can use kneader etc. to carry out mixing.

Then, in molding procedure, use above-mentioned raw materials composition and extrusion molding makes along long side direction, being set up in parallel a plurality of through holes across partition thus, and in periphery, be formed with the column honeycomb formed article of periphery wall.

Afterwards, utilize the drying machine drying honeycomb formed bodys such as microwave dryer, air drier, dielectric drier, pressure Reduction Dryer, vacuum drier, freeze drier, thereby make the dry body of honeycomb.

By the dry body of the honeycomb to obtained, carry out degreasing, burn till, can obtain thus the honeycomb catalyst unit of column.Degreasing, firing temperature are preferably 450～750 ℃, more preferably 550～650 ℃.If firing temperature is less than 450 ℃, the intensity step-down of honeycomb catalyst unit.On the other hand, if firing temperature surpasses 750 ℃, the reaction site of catalytic species reduces.

Then, to forming the manufacture method of the tapetum fibrosum of honeycomb catalyst module of the present utility model, describe.

Tapetum fibrosum can obtain by the whole bag of tricks, for example, carries out spinning as the spinning of raw material, thereby make the inorfil precursor of the fiber diameter with 3～10 μ m by air blast to take the basic aluminium chloride aqueous solution and silicon dioxide gel etc. with mixture.Then, compress above-mentioned inorfil precursor and make the continuous tablet of prescribed level, afterwards, implement to burn till processing, flood as required, dry inorganic bond and organic bond, and cut into the size of regulation, can make tapetum fibrosum thus.

Then, utilize accompanying drawing to describe assembling the method for honeycomb catalyst module of the present utility model.

Fig. 6 (a)～(e) is for schematically representing to assemble the figure of an example of the operation of honeycomb catalyst module of the present utility model with process sequence.

First, as shown in Figure 6 (a), the vertical member 22 that forms tapetum fibrosum 20 is configured in to the vertical component effect 18 of end 16 of the side of honeycomb catalyst unit 10, and fixed vertical parts 22.The method of fixed vertical parts 22 is not particularly limited, and can use binding agent to be fixed, and also available adhesive tape etc. is fixed.

When preferred binder and adhesive tape etc. are processed waste gas as the denitrification apparatus that utilizes the honeycomb catalyst module 100 produce through follow-up operation, because the heat of waste gas disappears.By using this binding agent and adhesive tape etc., can omit the work of removing binding agent and adhesive tape etc.

Then, as shown in Figure 6 (b), the honeycomb catalyst unit 10 of along continuous straight runs set specified quantity.And, the horizontal part 21 that forms tapetum fibrosum 20 is configured in to the horizontal part 17 of end 16 of the side of honeycomb catalyst unit 10 fixing horizontal parts 21.

In addition, as shown in Figure 6 (b), preferred levels parts 21 are configured to parts continuously in gathered a plurality of catalyst elements 10.

If configuration level parts 21 like this, can be with once-through operation configuration level parts 21, the operating efficiency while therefore manufacturing honeycomb catalyst module improves.

Then, in Fig. 6 (b), on the basis of a plurality of honeycomb catalysts unit 10 of set, the operation of repeatedly gathering honeycomb catalyst unit 10, makes the aggregate 40 that quadrangular as shown in Figure 6 (c) fills.

When making aggregate 40, also can utilize the temporarily fixing a plurality of honeycomb catalysts of binding agent or adhesive tape unit 10.In addition, binding agent or adhesive tape etc. preferably utilize through after the denitrification apparatus of the honeycomb catalyst module 100 that produces of operation while processing waste gas, because the heat of waste gas disappears.So, by using binding agent or adhesive tape etc., can omit the work of removing binding agent or adhesive tape etc.

Then,, as shown in Fig. 6 (d), a plurality of plate-shaped members 31 are configured in to the side of aggregate 40.Now, for fear of adjacent tapetum fibrosum 20, produce gap each other and a plurality of plate-shaped members 31 are exerted pressure.

Afterwards, utilize welding and screw thread etc. to be connected a plurality of plate-shaped members 31.Each setting tool connecting becomes fixed part 30.

By above operation, can make honeycomb catalyst module 100 of the present utility model as shown in Figure 6 (e).

[embodiment]

Below, by embodiment, the utility model is carried out more specifically brightly, but the utility model is not limited to following examples.

(embodiment 1)

(1) manufacture honeycomb catalyst unit

(1-1) mixed processes

By to titanium oxide 3910 mass parts, as ammonium metavanadate 210 mass parts of vanadium raw materials, ammonium metatungstate (50% solution) 670 mass parts as tungsten raw material, alumina adhesive 300 mass parts, glass fibre 170 mass parts, as methylcellulose 300 mass parts of shaping assistant, as sorbitol olein 80 mass parts of forming lubricant, as diethanol amine 150 mass parts, ion exchange water 1750 mass parts of pH adjusting agent, carry out mixed milling and carry out raw materials slurry.

(1-2) molding procedure

Then, using extrusion shaping machine is prescribed level by former slip extrusion molding, thereby makes the honeycomb formed article of four-prism shape.And use microwave dryer in batches honeycomb formed article to be dried to 6 minutes under the drying pressure of 86.7kPa and to obtain the dry body of honeycomb.

(1-3) firing process

Afterwards, the dry body of honeycomb is put in gas communication stove, with the programming rates of 5 ℃/min, be warming up to 550 ℃, this temperature maintenance is carried out to degreasing after 3 hours, burnt till, thereby make honeycomb sintered body.In addition, when burning till, the gas flow of take 20L/ minute import oxygen concentration as 21%, the nitrogen concentration mist that is 79%.

Through above operation, manufactured honeycomb catalyst unit.

About the shape of the honeycomb catalyst unit that produces, the square that the length that is shaped as a limit in the cross section vertical with long side direction of honeycomb catalyst unit is 150mm.In addition, the thickness of partition is 1.0mm, and the thickness of periphery wall is 1.6mm, and spacing is 8.0mm.In addition, the length of the long side direction of honeycomb catalyst unit is 1000mm.

(2) prepare tapetum fibrosum

The tapetum fibrosum of shearing thickness 12mm (name of product: Insulfrax-S Blanket, Uniflax company manufactures), thereby the vertical member of making length x width=150mm * 50mm, and the horizontal part of length x width=1800mm * 50mm.

(3) assembling honeycomb catalyst module

(3-1) aggregate production process

Prepare 12 honeycomb catalyst unit, in the vertical component effect configuration vertical member of each honeycomb catalyst unit and fix with binding agent, simultaneously by each honeycomb catalyst unit to horizontal direction set.Then, at the horizontal part configuration level parts of each honeycomb catalyst unit and fix with binding agent.

Then, repeatedly carry out having in set the step of the basic upper set honeycomb catalyst unit of each honeycomb catalyst unit, to arrange 12 to horizontal direction, to make aggregate to the mode of 6 honeycomb catalyst unit of vertical direction arrangement.

(3-2) the fixing operation of aggregate

Preparing 2 sizes is length x width=984mm * 1000mm, the iron plate-shaped member of thickness 1mm, with 2 length x width=1958mm * 1000mm, the iron plate-shaped member of thickness 1mm, on the cross section vertical with long side direction of honeycomb catalyst module, at the partial configuration plate-shaped member that becomes the periphery of honeycomb catalyst module.That is, at the side of aggregate configuration plate-shaped member.

Then, each plate-shaped member is exerted pressure, in order to avoid adjacent tapetum fibrosum produces gap each other.Afterwards, by being welded to connect each plate-shaped member.

Through above operation, manufactured the related honeycomb catalyst module of embodiment 1.

The length on the long limit in the cross section vertical with long side direction of the honeycomb catalyst module that embodiment 1 is related is 1958mm, and the length of minor face is 986mm.In addition, the length of the long side direction of honeycomb catalyst module is 1000mm.

Claims

1. a honeycomb catalyst module, is characterized in that,

Across partition, along long side direction, be set side by side with a plurality of through holes that do not seal both ends, and gathering a plurality of honeycomb catalyst unit that are formed with periphery wall in periphery and form, there is the tapetum fibrosum consisting of inorfil in adjacent honeycomb catalyst unit at least a portion each other.

2. honeycomb catalyst module according to claim 1, wherein,

Described tapetum fibrosum is divided at least 2 above parts.

3. honeycomb catalyst module according to claim 1 and 2, wherein,

Described tapetum fibrosum is disposed at the both ends of the side of the described honeycomb catalyst unit on described long side direction.

4. honeycomb catalyst module according to claim 3, wherein,

The tapetum fibrosum of end side that is disposed at the tapetum fibrosum on the side end of side of described honeycomb catalyst unit and is disposed at the side of described honeycomb catalyst unit is different parts.

5. honeycomb catalyst module according to claim 1 and 2, wherein,

The rectangle that the length that is shaped as a limit in the cross section vertical with described long side direction of described honeycomb catalyst unit is 140～160mm.

6. honeycomb catalyst module according to claim 1 and 2, wherein,

The thickness of described partition is 0.05～2.5mm.

7. honeycomb catalyst module according to claim 1 and 2, wherein,

The thickness of described periphery wall is 0.05～3.0mm.

8. honeycomb catalyst module according to claim 1 and 2, wherein,

The spacing of described through hole is 0.8～19mm.

9. honeycomb catalyst module according to claim 1 and 2, wherein,

The average pore footpath of described honeycomb catalyst unit is 0.01～0.5 μ m.

10. honeycomb catalyst module according to claim 5, wherein,

The length that is shaped as long limit in the cross section vertical with described long side direction of described honeycomb catalyst module is 1800～2000mm, the rectangle that the length of minor face is 900～1000mm.