CN106268315A

CN106268315A - SCR tilling beaded catalyst module

Info

Publication number: CN106268315A
Application number: CN201510254779.4A
Authority: CN
Inventors: 徐文辉; 付永强; 郭伟; 朱晔斐
Original assignee: Shanghai Taixin Environmental Engineering Ltd By Share Ltd
Current assignee: Shanghai Taixin Environmental Engineering Co., Ltd
Priority date: 2015-05-19
Filing date: 2015-05-19
Publication date: 2017-01-04
Anticipated expiration: 2035-05-19
Also published as: CN106268315B

Abstract

The invention discloses a kind of SCR tilling beaded catalyst module of field of Environment Protection, including just flue gas thin layer, catalyst film air inlet porous plate, catalyst film is given vent to anger porous plate, catalyst film, neat stress thin layer, preparing catalyst layer, catalyst film top swash plate, swash plate at the bottom of catalyst film, just flue gas gas sealing plate, neat stress gas sealing plate, module deckle board and catalyst junior unit, catalyst module is made up of junior unit, catalyst module is placed on one layer of reactor, first flue gas thin layer in junior unit, neat stress thin layer, the width scalable of catalyst film, in junior unit, the design direction of catalyst film is consistent with flue gas flow, an inclination angle is had bottom thin layer, this inclination angle is close with flow of flue gas angle；Catalyst film is oriented parallel to flue gas flow, and catalyst film both sides are porous plate.The present invention has and reduces the volume of catalyst module, reduces energy consumption, avoid module blocking and extend the advantage such as catalyst change time.

Description

SCR tilling beaded catalyst module

Technical field

The present invention relates to a kind of pellet type catalyst module of field of Environment Protection, this catalyst module is specific to graininess low temperature catalyst and researches and develops, is a kind of low-temperature SCR tilling beaded catalyst module being particularly well-suited to incinerator.

Background technology

SCR(Selective Catalytic Reduction) it is SCR technology, development was very fast in recent years, was widely used in West Europe and Japan, and current ammonia catalytic reduction process method is technology that should be with the most use.

SCR catalyst is when being originally developed, and shape is granular.Later in order to prevent catalyst layer from being blocked by powder, reducing the loss of pressure, and use cellular or tabular catalyst, this catalyst can select the spacing of grid according to powder concn in aerofluxus.At present main flow catalyst structure form be cellular, pull shape, corrugated plate dst three kinds.Wherein, honeycomb catalyst belongs to homogeneous catalysis, it is adaptable to the flue gas of low dust-laden, and pressure drop is big, and wearability is general, and it is installed module and is made up of steel construction and ceramic gasket；Board-like catalyst belongs to heterogeneous catalyst, is relatively applicable to the flue gas of high dust-laden, and pressure drop is less, and abrasion resistance is preferable, installs metal framework based on module, and weight is bigger；Corrugated plate dst catalyst belongs to heterogeneous catalyst, and pressure drop is little, and catalyst activity is high, install module be glass fibre be framework, lighter in weight.Three of the above catalyst is suitable for working under middle hot environment, and the layout of catalyst mostly is multi-tier arrangement.In garbage incinerating power plant, suitable denitrating technique section is low temperature micronic dust environment, and three of the above catalyst is all difficult to meet its denitration reaction environment.And graininess low temperature catalyst is owing to its specific surface area is big, reactivity is high, the denitration reaction environment of incinerator can be suitable for.But, for corpuscular catalyst, the most also do not have applicable catalyst module, in order to solve that its flue gas pressure drop is big, catalyst or dust blocking, the frequently problem such as more catalyst changeout and reactor occupation of land.

Summary of the invention

The invention aims to solve beaded catalyst module in denitration running, the blocking of appearance, high pressure degradation problem, a kind of CR tilling beaded catalyst module is provided, by tilling model structural design, allow flue gas uniformly and be sufficiently mixed with catalyst, meanwhile, reduce energy expenditure, reduce reactor volume and capital construction mechanism, extend the catalyst change time.

The present invention is achieved by the following technical solutions:

nullA kind of SCR tilling beaded catalyst module，Including just flue gas thin layer、Catalyst film air inlet porous plate、Catalyst film is given vent to anger porous plate、Catalyst film、Neat stress thin layer、Preparing catalyst layer、Catalyst film top swash plate、Swash plate at the bottom of catalyst film、Just flue gas gas sealing plate、Neat stress gas sealing plate、Module deckle board and catalyst junior unit，Catalyst module is made up of several junior units，Junior unit is placed in module deckle board，Each junior unit comprises just flue gas thin layer、Neat stress thin layer、Catalyst film and preparing catalyst layer，Catalyst module is placed on one layer of reactor,It is characterized in that: formed catalyst module by several junior units，The quantity of junior unit can adjust the quantity of junior unit in individual module as the case may be，First flue gas thin layer in junior unit、Neat stress thin layer、The width scalable of catalyst film，Regulation according to the main and Flow Field Distribution of flue gas、Pressure drop and denitration efficiency etc. are relevant，All catalyst are all placed on one layer of reactor，Can effectively reduce the height of reactor，Simultaneously，Can avoid owing to multi-layer catalyst arranges the high pressure drop brought；In junior unit, the design direction of catalyst film is consistent with flue gas flow, an inclination angle is had bottom thin layer, this inclination angle is close with flow of flue gas angle, owing to now flue gas is negative pressure, so when flowing through catalyst film, have certain inclination angle, when with catalyst, this angle arranges that inclination angle is consistent, its best results；Catalyst film is oriented parallel to flue gas flow, owing to catalyst film is oriented parallel to flue gas flow, so in the case of ensureing a constant pressure drop, can install more catalyst under same volume catalyst module；Catalyst film both sides are porous plate, and catalyst film both sides use porous plate design, by the size in hole, spacing are carried out flow field simulation design, allow flue gas mix with catalyst evenly, reduce pressure drop simultaneously, it is to avoid block.

The method have the advantages that

The present invention has in the case of same catalytic amount, effectively reduce the volume of catalyst module, thus reduce reactor volume, reduce and take up an area, it is suitable for tight space to arrange, the utilization rate of catalyst can also be improved simultaneously, allow flue gas sufficiently and uniformly mix with catalyst, ensure gas residence time, thus catalyst reaction efficiency is provided.By tilling design, moreover it is possible to reduce pressure drop, reduce energy consumption, it is to avoid module blockage problem, and extend the catalyst change time.

Accompanying drawing explanation

Fig. 1 is SCR tilling beaded catalyst function structure chart；

Fig. 2 is that catalyst film passes in and out gas perforated plate construction figure.

In figure: first flue gas thin layer 1, catalyst film air inlet porous plate 2, catalyst film are given vent to anger swash plate 8, first flue gas gas sealing plate 9, neat stress gas sealing plate 10, module deckle board 11 and catalyst junior unit 12 at the bottom of porous plate 3, catalyst film 4, neat stress thin layer 5, preparing catalyst layer 6, catalyst film top swash plate 7, catalyst film.

Detailed description of the invention

With concrete application, present disclosure is described further below in conjunction with the accompanying drawings:

It as shown is SCR tilling beaded catalyst function structure chart, gives vent to anger swash plate 8, first flue gas gas sealing plate 9, neat stress gas sealing plate 10, module deckle board 11 and catalyst junior unit 12 at the bottom of porous plate 3, catalyst film 4, neat stress thin layer 5, preparing catalyst layer 6, catalyst film top swash plate 7, catalyst film including just flue gas thin layer 1, catalyst film air inlet porous plate 2, catalyst film.

A. when flue gas enters catalyst module, initially entering just flue gas thin layer, then by catalyst film air inlet porous plate, flue gas can uniformly enter catalyst film；Flue gas, when entering catalyst film, is affected by negative pressure extracting and porous plate perforate is designed, can be angled into, and meanwhile, the catalyst film of design different in width, to ensure that flue gas has enough reaction times；Flue gas, after catalyst film generation denitration reaction, is gone out by catalyst film porous plate of giving vent to anger, to neat stress thin layer, is finally gone out catalyst module；

B. after catalyst module runs a period of time; catalyst is for a long time by sweep of gases; have fraction catalyst breakage; damaged catalyst can be taken out of catalyst module by flue gas; simultaneously; the little particle dust carried in flue gas, as well as the gap between catalyst, is taken out of catalyst module by flue gas；The design of porous plate so catalyst film is given vent to anger, should ensure catalyst granules stable leave in catalyst film, damaged catalyst granules can be taken out of module by flue gas, also needs to consider the flow Field Design of flow of flue gas simultaneously, makes the flowing of flue gas keep certain angle；When parts against wear catalyst is pulled away, catalyst film inner catalyst can decline, and now preparing catalyst layer can follow decline, in order to ensure that catalyst film inner catalyst is in full state all the time, because of without frequent catalyst filling；

The most in the accompanying drawings, module has three catalyst junior units, and the junior unit quantity of each module can regulate, and its quantity is relevant to denitration requirement, layout place etc.；The width of first flue gas thin layer, catalyst film and neat stress thin layer in each junior unit can regulate accordingly, and its regulation factor mainly considers that pressure drop and reaction time, general just flue gas thin layer can keep consistent with the width of neat stress thin layer；

The most tilling catalyst module designs, and catalyst arranged direction is consistent with flow of flue gas direction, can maximally utilize the bulk of module, thus in limited space, place more catalyst, the most do not increase pressure drop, reduce energy consumption, save SCR arrangement space.

Claims

null1. a SCR tilling beaded catalyst module，Including just flue gas thin layer、Catalyst film air inlet porous plate、Catalyst film is given vent to anger porous plate、Catalyst film、Neat stress thin layer、Preparing catalyst layer、Catalyst film top swash plate、Swash plate at the bottom of catalyst film、Just flue gas gas sealing plate、Neat stress gas sealing plate、Module deckle board and catalyst junior unit，Catalyst module is made up of several junior units，Junior unit is placed in module deckle board，Each junior unit comprises just flue gas thin layer、Neat stress thin layer、Catalyst film and preparing catalyst layer，Catalyst module is placed on one layer of reactor,It is characterized in that: formed catalyst module by several junior units，The quantity of junior unit can adjust the quantity of junior unit in individual module as the case may be，First flue gas thin layer in junior unit、Neat stress thin layer、The width scalable of catalyst film.
SCR the most according to claim 1 tilling beaded catalyst module, it is characterised in that: in junior unit, the design direction of catalyst film is consistent with flue gas flow, has an inclination angle bottom thin layer, and this inclination angle is close with flow of flue gas angle.
SCR the most according to claim 1 tilling beaded catalyst module, it is characterised in that: catalyst film is oriented parallel to flue gas flow, and catalyst film both sides are porous plate.