CN105214496B - A kind of dedusting and denitrification integrated device - Google Patents

A kind of dedusting and denitrification integrated device Download PDF

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CN105214496B
CN105214496B CN201510708983.9A CN201510708983A CN105214496B CN 105214496 B CN105214496 B CN 105214496B CN 201510708983 A CN201510708983 A CN 201510708983A CN 105214496 B CN105214496 B CN 105214496B
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dedusting
ammonia
denitrification
flue
catalyst
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CN105214496A (en
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展宗城
杨艳林
展宗刚
李顺
杨峰
袁小芳
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展宗城
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Abstract

The present invention relates to a kind of dedusting and denitrification integrated devices, including ammonia-gas spraying device, dedusting and denitrification apparatus, mixing flue, dust collecting, discharge flue and back-blowing device, one end of mixing flue is connected with the smoke inlet of dedusting and denitrification apparatus, and other end exhaust uptake is connected;One end of discharge flue is connected with exhanst gas outlet, and the other end is connected with air-introduced machine;Ammonia-gas spraying device is mounted on mixing flue;Dust collecting is mounted on dedusting and denitrification apparatus bottom end;Back-blowing device is mounted on dedusting and denitrification apparatus inner upper.This invention removes dust to the washing away of catalyst, wears, blocks and poisoning effect, especially eliminate deterioration of the ultrafine dust to SCR catalyst performance, improve catalyst life and denitration efficiency, device is in the process of running to the removal efficiency of NOx up to 90% or more, it can synchronize and realize high-effective dust-removing and denitration, further widen the application field of SCR denitration technology.

Description

A kind of dedusting and denitrification integrated device
Technical field
The present invention relates to a kind of smoke eliminator more particularly to a kind of dedusting and denitrification integrated devices, are suitable for low Warm flue gas ash removal and selective-catalytic-reduction denitrified, belongs to Air Pollution Control field.
Background technology
China belongs to nitrogen oxides (NOx) discharge big country, based on fossil fuel (>90%) energy resource structure determines me State's NOx emission total amount remains high always, and average annual total emission volumn is chronically at 20,000,000 tons or more, is only second to the U.S..China head The air of the big denses group of cities such as triangle, Pearl River Delta and Jing-jin-ji region shows apparent compartmentalization features of pollution, atmospheric environment In NOx concentration it is generally higher, hour concentration is exceeded to happen occasionally and growth trend occurs.In the NOx emission total amount in China, Thermal power generation accounts for 36%, and communications and transportation accounts for 17.6%, and industry and other energy conversions are respectively to the contribution margin of NOx emission total amount 33.7% and 6.5%.As can be seen that the NOx discharge of industry and other energy conversion industries is suitable with power industry, to discharge The contribution margin of total amount is more than 40%.In recent years, country started to turn to non-electricity industry to the emphasis of NOx emission control, for work Industry boiler, waste incineration, metallurgy, petrochemical industry cracking, chemical plant, new energy have put into effect corresponding discharge with industries such as metallurgical acid cleaning gas Standard.
For the flue gas particularity of above-mentioned industry:Flue gas condition is more complicated, and flue-gas temperature is relatively low, and fluctuation is bigger, Flue-gas temperature after economizer is 130~200 DEG C, and the flue-gas temperature of chemical industry is lower, almost close with room temperature.SCR skills There is very big difficulty in denitrating flue gas of the art for above-mentioned industry, if high temperature SCR catalyst to be used for the flue gas of above-mentioned industry Denitration engineering needs to configure complicated heat-exchange system, and energy consumption is huge, and investment, operating cost are very high, at the same to follow-up dedusting, Sulfur removal technology is made troubles.Low-temperature SCR catalyst is applied to the denitration engineering of non-electricity industry low-temperature flue gas, in can effectively solving High-temperature scr catalyst is for technical bottleneck, the flue-gas temperature and low-temperature SCR of such industry existing for non-electricity industry low-temperature flue gas The temperature window of catalyst is consistent.But the flue gas of the industries such as Industrial Boiler, chemical process, glass, cement, building materials is more special Very, ingredient and composition are complicated and changeable, and the flue dust that can largely cause catalyst activity reduction or poisoning and deactivation is usually contained in flue gas, If alkali metal, alkaline-earth metal and huge sum of money species are in the absorption and attachment of catalyst surface, ultrafine dust diffuses into catalyst Microcellular structure etc. can cause catalyst activity drastically to decline or even inactivate.In order to ensure that SCR catalyst being capable of reliable, stable fortune Row, pre-processes flue gas to remove the particulate matters such as smoke abatement, to alleviate the dust in flue gas to the bad effect of catalyst, is prolonged The service life of long catalyst.Certain methods and strategy are disclosed in the prior art, to reduce the dust in flue gas to catalyst The negative effect of generation improves the performance and chemical lifetime of catalyst.Patent CN 102688629 discloses a kind of SCR denitration and removes Dirt device, technical characterstic be spray ammonia after flue gas from level become the flue flowed to vertically upward 90 ° of elbows be equipped with remove Dirt guiding device, for removing the large-size particles object in flue gas.Patent CN 103463871 discloses a kind of glass fibre and covers Film filtering material coats SCR catalyst coating in fiberglass surfacing, then carries out high temperature hot pressing with ptfe surface film and cover Film, gained filtrate has denitration and dedusting function concurrently, but the relevant parameter of SCR catalyst coating is difficult to control, may shadow after overlay film Ring catalyst performance and removal efficiency.Patent CN 104190193 disclose a kind of synchronized desulfuring, denitration and dedusting method, Into reducing agent and manganese oxide catalyst is injected in the flue gas of deduster, carried out as SCR reactors using sack cleaner Denitration reaction, dust and catalyst after reaction in flue gas are trapped within dedusting filtering bag surface and form filter cake, to catalysis after recycling Agent carries out activating and regenerating processing to achieve the purpose that recycle.It is mixed into the burden that catalyst increases deduster in flue gas, urges It is mixed into volume of smoke in agent to be unfavorable for the regeneration of catalyst and recycle, needs to increase blowback frequency to ensure dust removal device There is lower crushing, furthermore, it is necessary to configure complicated catalyst regeneration, activation system.Patent CN 204294116 discloses one Particle aggregation device, flue gas is arranged in kind denitrating flue gas dust-extraction unit, the flue between economizer exit and SCR reactor inlets Turbulent flow whirlpool is generated under the action of portion's production whirlpool plate (triangle, rectangle, trapezoidal etc.) in the device, fine particle is sent out at whirlpool It is raw to collide and aggregate into larger particles, realize effective trapping to fine particle.Patent CN 104399371 discloses one Low-temperature denitration dedusting Thermal desorption integral method and device in kind, including it is particulate collection discharge section, gas cleaning fillter section, mixed Parsing regenerator section and denitration reaction section are closed, denitrating system uses cellular low-temperature SCR catalyst.Flue gas initially enters bag-type dusting Device, the clean flue gas after dust removal process enter SCR reaction systems, realize dedusting and SCR denitration reaction step by step, eliminate cigarette The negative effect that dirt generates SCR catalyst.SCR reactors are placed in above bag filter, and system structure is huge, auxiliary system Complexity is made troubles to operations such as deduster maintenance, catalyst changes.
Accordingly, it is desirable to provide a kind of combined type dedusting and denitrification apparatus (9), reduce flue dust and make to the deterioration of SCR catalyst Enter SCR system after dedusting with, flue gas, can alleviate dust in flue gas to the abrasion of catalyst, wash away, block, poison etc. it is bad Change acts on, furthermore, it is necessary to ensure that system is in the lower pressure loss.
Invention content
In order to overcome the deficiencies of existing technologies and insufficient, in view of the above problems, the present invention propose a kind of dedusting and Low-temperature denitration integrated apparatus becomes one dedusting and denitration function, is carried out in dedusting filtering bag and internal catalyst layer Dedusting and denitration.Flue gas removes the dust in flue gas through dedusting filtering bag, and the clean flue gas after dedusting enters the catalysis of the SCR in filter bag Selective catalytic reduction occurs for oxidant layer, realizes the purpose of synchronized dust removal and denitration.
The technical solution that the present invention solves above-mentioned technical problem is as follows:A kind of dedusting and denitrification integrated device, including spray Ammonia device, dedusting and denitrification apparatus, mixing flue, dust collecting, discharge flue and back-blowing device,
The dedusting and denitrification apparatus are equipped with smoke inlet and exhanst gas outlet, one end of the mixing flue and the cigarette Gas entrance is connected, and the other end of the mixing flue is connected with the exhaust uptake for generating flue gas device;The discharge flue One end be connected with the exhanst gas outlet, the other end of the discharge flue is connected with air-introduced machine;
The ammonia-gas spraying device is mounted on the mixing flue;
The dust collecting is mounted on the dedusting and denitrification apparatus bottom end;
The back-blowing device is mounted on the dedusting and denitrification apparatus inner upper.
The beneficial effects of the invention are as follows:This invention removes dust to wash away, wear, blocks and poison work to catalyst With especially eliminating deterioration of the ultrafine dust to SCR catalyst performance, improve catalyst life and denitration efficiency, device exists To the removal efficiency of NOx up to 90% or more in operational process, it can synchronize and realize high-effective dust-removing and denitration, further widen The application field of SCR denitration technology.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the ammonia-gas spraying device includes for conveying the main pipe of ammonia, multiple branch pipes, ammonia-spraying grid and ammonia processed dress It sets, the ammonia-preparing device is connected with the branch pipe by main pipe, and the ammonia-spraying grid is mounted in the mixing flue,
The main pipe is at least one, and one end of each main pipe is connected with the ammonia-preparing device, the other end with One end of multiple branch pipes is connected;Multiple branch pipes are disposed in parallel in outside the mixing flue, and each branch pipe is equal It is connected with the ammonia-spraying grid, the setting direction of the ammonia-spraying grid and flow of flue gas direction are angled;The spray ammonia Multiple spray ammonia nozzles for spraying ammonia are installed, the spray ammonia nozzle is evenly distributed on the ammonia-spraying grid on grid;
First control device is installed in each main pipe, is controlled in the ammonia-preparing device and described first in the main pipe The first valve is equipped between device processed;The first control device controls the first valve operation;
The second valve is installed on each branch pipe, the second control is equipped between second valve and the ammonia-spraying grid Device processed;The second control device controls the second valve operation;
The first control device and the second control device control the ammonia-preparing device operation respectively.
Further, the setting direction of the ammonia-spraying grid and the angle in flow of flue gas direction are 0~90 degree.
Further, it is additionally provided with mixer, the mixer is mounted on the ammonia-gas spraying device and the dedusting and denitrification apparatus Between mixing duct in.
Further, the dust collecting includes multiple dust compartments, and multiple dust compartments are disposed in parallel in described remove Dirt and denitrification apparatus bottom end, and with communicated inside the dedusting and denitrification apparatus, the dust compartment be stand upside down taper knot Structure, the dust compartment upper end are fixed on the dedusting and denitrification apparatus bottom end, and lower end is equipped with closed discharge valve.
Further, the dedusting and denitrification apparatus include crust of the device, buck plate, multiple dedustings and denitration cell cube and cigarette Gas flow pass, described device enclosure is hollow, and the buck plate is mounted on above described device enclosure, the assembly The flue gas flow pass is equipped between plate and described device cover top portion;Multiple dedustings and the setting of denitration unit volume array Be fixed on the buck plate in described device enclosure and upper end, on described device shell with the flue gas flow pass The corresponding side wall in position is equipped with the exhanst gas outlet, and the smoke inlet is equipped on described device outer casing underpart side wall;
The dedusting and denitration cell cube include dedusting filtering bag, bag cage, catalyst and neat stress channel, the dedusting filtering bag For tube structure, the bag cage is supported on the tube structure inner wall, and the catalyst is mounted on the inside of the bag cage, institute The channel for stating catalyst composition is the neat stress channel,
The dedusting filtering bag upper end is equipped with connector, and the connector is the round estrade structure of inner hollow, the round platform The smaller one end of body diameter of movement is fixedly connected with the dedusting filtering bag upper port;The other end of the round estrade structure is fixed on On the buck plate.
Further, the catalyst is SCR catalyst, and the SCR catalyst is pumiceous texture, the pumiceous texture With three-dimensional open-framework, the porosity of the pumiceous texture is 25~85%.
Further, the active component of the SCR catalyst is V2O5-WO3、V2O5-Mo3、V2O5-WO3-Mo3、CeO2-WO3、 CeO2-Mo3、CeO2-ZrO2、CeO2-ZrO2-WO3、CeO2-Mo3Or CeO2-ZrO2-Mo3In any one.
Further, the back-blowing device is Pulse anti-blow device, and the Pulse anti-blow device is mounted on above buck plate, The connector of dedusting filtering bag described in blowing mouth face.
Compared with prior art, the present invention has the following advantages:
1) synchronized dust removal and denitration are realized, integrates dedusting and denitration function, eliminates and SCR reactors are separately provided, Ancillary equipment facility is simplified, investment and operating cost are further saved.
2) SCR catalyst is placed in inside dedusting filtering bag, and flue gas carries out denitration after filter bag dedusting, slows down flue dust to denitration The abrasion of catalyst and poisoning effect effectively extend the service life of catalyst.
3) double action of the flue gas through dedusting filtering bag and catalyst optimizes the mixed effect of flue gas and reducing agent, improves The uniformity of velocity of flue gas, temperature and concentration distribution.
4) foam-like low-temperature SCR catalyst have unique 3D pore passage structures, flue gas in duct along curve motion, into one Step optimizes the mixed effect of flue gas, low-temperature SCR catalyst;Present apparatus running temperature is 160~260 DEG C, and flue gas passes through dedusting The volume flow on filter bag surface is 36~120 (m3/m2˙h).For removing dust and nitrogen oxides in low-temperature flue gas;By SCR The temperature window of technology widens the requirement reduced to 160~260 DEG C to equipment.
In conclusion this invention removes dust to the washing away of catalyst, wears, blocks and poisoning effect, especially eliminate Deterioration of the ultrafine dust to SCR catalyst performance, improves catalyst life and denitration efficiency, device is right in the process of running The removal efficiency of NOx can synchronize up to 90% or more and realize high-effective dust-removing and denitration, further widen SCR denitration technology Application field.
Description of the drawings
Fig. 1 apparatus of the present invention flow diagrams;
Dedusting and denitration cell cube schematic diagram in Fig. 2 present invention;
Fig. 3 is the structural schematic diagram of A-A sections in Fig. 2;
Fig. 4 is the structural schematic diagram of B-B sections in Fig. 2.
In attached drawing, parts list represented by the reference numerals are as follows:
1, ammonia-gas spraying device, 1-1, main pipe, 1-2, branch pipe, 1-3, ammonia-spraying grid, 1-4, ammonia-preparing device, 1-5, the first control dress Set, 1-6, the first valve, 1-7, spray ammonia nozzle, 1-8, the second valve, 1-9, second control device 2, mixing flue, 3, dust dress It sets, 3-1, dust compartment, 3-2, closed discharge valve, 4, dedusting and denitration cell cube, 4-1, dedusting filtering bag, 4-3,4-2, bag cage are urged Agent, 4-4, neat stress channel, 5, buck plate, 6, back-blowing device, 7, smoke discharging flue, 8, crust of the device, 9, dedusting and denitration Device.
Specific implementation mode
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and It is non-to be used to limit the scope of the present invention.
As shown in Figures 1 to 4, K is flow of flue gas direction in figure.
A kind of dedusting and denitrification integrated device, including ammonia-gas spraying device 1, dedusting and denitrification apparatus 9, mixing flue 2, dust Collection device 3, discharge flue 7 and back-blowing device 6,
The dedusting and denitrification apparatus 9 are equipped with smoke inlet and exhanst gas outlet, one end of the mixing flue 2 with it is described Smoke inlet is connected, the other end of the mixing flue 2 and the exhaust for generating flue gas device (not marking the structure on the diagram) Flue is connected;One end of the discharge flue 7 is connected with the exhanst gas outlet, the other end of the discharge flue 7 with draw Wind turbine (not marking the structure on the diagram) is connected;
The ammonia-gas spraying device 1 is mounted on the mixing flue 2;
The dust collecting 3 is mounted on 9 bottom end of the dedusting and denitrification apparatus;
The back-blowing device 6 is mounted on 9 inner upper of the dedusting and denitrification apparatus.
The ammonia-gas spraying device 1 includes for conveying the main pipe 1-1 of ammonia, multiple branch pipe 1-2, ammonia-spraying grid 1-3 and ammonia processed Device 1-4, the ammonia-preparing device 1-4 are connected with the branch pipe 1-2 by main pipe 1-1, the ammonia-spraying grid 1-3 installations In the mixing flue 2,
The main pipe 1-1 is at least one, and one end of each main pipe 1-1 is connected with the ammonia-preparing device 1-4, The other end is connected with one end of multiple branch pipe 1-2;Multiple branch pipe 1-2 are disposed in parallel in outside the mixing flue 2, Each branch pipe 1-2 is connected with the ammonia-spraying grid 1-3, the setting direction and flow of flue gas of the ammonia-spraying grid 1-3 Direction is angled;Multiple spray ammonia nozzle 1-7 for spraying ammonia, the spray ammonia are installed on the ammonia-spraying grid 1-3 Nozzle 1-7 is evenly distributed on the ammonia-spraying grid 1-3;
It is equipped on first control device 1-5, the main pipe 1-1 in the ammonia-preparing device 1-4 on each main pipe 1-1 The first valve 1-6 is equipped between the first control device 1-5;The first control device 1-5 controls first valve 1-6 is run;
Be equipped on each branch pipe 1-2 the second valve 1-8, the second valve 1-8 and the ammonia-spraying grid 1-3 it Between be equipped with second control device 1-9;The second control device 1-9 controls the second valve 1-8 operations;
The first control device 1-5 and second control device 1-9 controls the ammonia-preparing device 1-4 operations respectively.
The setting direction of the ammonia-spraying grid 1-3 and the angle in flow of flue gas direction are 0~90 degree.
According to flue gas condition and exit concentration requirement, control set for adjusting 1-5, to reach best ammonia/nitrogen molar ratio.Flue gas Enter mixing flue 2 after ammonia-spraying grid 1-3 in order to promote being sufficiently mixed for flue gas and reducing agent to be arranged in mixing flue 2 The mixer of definite shape, to optimize the mixed effect of flue gas and reducing agent.
Be additionally provided with mixer in the mixing flue 2, the mixer be mounted on the ammonia-gas spraying device 1 and the dedusting and In mixing duct between denitrification apparatus 9.The mixer is imitated by changing fluid state to improve the mixing of flue gas and reducing agent Fruit.Near mixer, flue gas is in turbulence state.
The dust collecting 3 includes multiple dust compartment 3-1, and multiple dust compartment 3-1 are disposed in parallel in described remove 9 bottom end of dirt and denitrification apparatus, and with communicated inside the dedusting and denitrification apparatus 9, the dust compartment 3-1 be stand upside down cone Shape structure, the upper ends the dust compartment 3-1 are fixed on 9 bottom end of the dedusting and denitrification apparatus, and lower end is equipped with closed Discharge valve 3-2.Dust in flue gas is stored in dust compartment 3-1 after dedusting filtering bag 4-1 retentions, then passes through closed discharge valve 3- 2 discharges.
The dedusting and denitrification apparatus 9 include crust of the device 8, buck plate 5, multiple dedustings and denitration cell cube 4 and flue gas Flow pass, 8 inner hollow of described device shell, the buck plate 5 are mounted on 8 inner upper of described device shell, the dress Matching board 5 and described device shell are equipped with the flue gas flow pass between 8 top;4 gusts of multiple dedustings and denitration cell cube Row setting is fixed in the inside of described device shell 8 and upper end on the buck plate 5, on described device shell 8 with the cigarette Air-flow goes out the corresponding side wall of channel position and is equipped with the exhanst gas outlet, is equipped on 8 lower sides of described device shell described Smoke inlet;
The dedusting and denitration cell cube 4 include dedusting filtering bag 4-1, bag cage 4-2, catalyst 4-3 and neat stress channel 4- 4, the dedusting filtering bag 4-1 are tube structure, and the bag cage 4-2 is supported on the tube structure inner wall, the catalyst 4-3 Mounted on the inside of the bag cage 4-2, the channel that the catalyst 4-3 is constituted is the neat stress channel 4-4,
The upper ends the dedusting filtering bag 4-1 are equipped with connector, and the connector is the round estrade structure of inner hollow, the circle The smaller one end of platform body structure diameter is fixedly connected with the dedusting filtering bag 4-1 upper ports;The other end of the round estrade structure It is fixed on the buck plate.
The catalyst 4-3 is SCR catalyst, and the SCR catalyst is pumiceous texture, and the pumiceous texture has The porosity of three-dimensional open-framework, the pumiceous texture is 25~85%.Catalyst inside dedusting and denitration cell cube is Foam-like low-temperature SCR catalyst, shape are hollow cylinder, and the low-temperature SCR catalyst in dedusting filtering bag uses module assembled Mode installed, between catalyst using flame-proof thermal insulation material be isolated.Flue gas removes fine solid particle through dedusting filtering bag first, Alleviate dust to the abrasion of catalyst, impact, block, poison, extend the service life of low-temperature SCR catalyst, foam The unique interlaced 3D pore passage structures of shape low-temperature SCR catalyst, flue gas riding inside duct further carry The high mixed effect of flue gas, promotes the quick progress of SCR reactions.
The active component of the SCR catalyst is V2O5-WO3、V2O5-Mo3、V2O5-WO3-Mo3、CeO2-WO3、CeO2-Mo3、 CeO2-ZrO2、CeO2-ZrO2-WO3、CeO2-Mo3Or CeO2-ZrO2-Mo3In any one.
The back-blowing device 6 is Pulse anti-blow device, and the Pulse anti-blow device is mounted on 5 top of buck plate, blowing The connector of dedusting filtering bag 4-1, purified clean flue gas described in mouth face are discharged into air through exit flue 7 and air-introduced machine.
The operation principle and the course of work of the present invention:When device is run, the former flue gas of dust-laden and NOx, which enter, to be arranged in device The ammonia-gas spraying device 1 of inlet flue duct is sprayed from ammonia-spraying grid 1-3 and spray ammonia nozzle 1-7 into flue gas according to the composition of flue gas and condition Enter reducing agent, the straying quatity of reducing agent controlled using control device 1-5, be equipped with the mixing flue 2 of flue gas mixer to flue gas into Row mixing.Be mixed with the former flue gas of reducing agent and enter dedusting and denitrification apparatus 9 through entrance, flue gas first with dedusting and denitration cell cube 4 dedusting filtering bag 4-1 contact, dust are trapped in the outer surface of filter bag 4-1 under the action of dedusting filtering bag 4-1, outside filter bag 4-1 Regular blowback effect of the dust of surface collection through back-blowing device 6 is lower to be detached from dedusting filtering bag 4-1, and collects in dust compartment 3-1. Neat stress after dedusting enters the SCR catalyst layer 1-3 of dedusting and denitration cell cube 4, and the NOx in flue gas is in catalyst 1- 3 surfaces are reduced into N2And H2O, the clean flue gas after reaction enter the neat stress channel 4-4 at 4 center of dedusting and denitration cell cube In, after collecting air is discharged into through flue 7.The denitration efficiency of the present apparatus is up to 90% or more, and the escaping of ammonia rate is less than 3ppm, after processing Clean flue gas in NOx concentration meet discharging standards.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (7)

1. a kind of dedusting and denitrification integrated device, which is characterized in that including ammonia-gas spraying device (1), dedusting and denitrification apparatus (9), Flue (2), dust collecting (3), discharge flue (7) and back-blowing device (6) are mixed,
The dedusting and denitrification apparatus (9) are equipped with smoke inlet and exhanst gas outlet, one end of the mixing flue (2) with it is described Smoke inlet is connected, and the other end of the mixing flue (2) is connected with the exhaust uptake for generating flue gas device;The smoke evacuation The one end in channel (7) is connected with the exhanst gas outlet, and the other end of the discharge flue (7) is connected with air-introduced machine;
The ammonia-gas spraying device (1) is mounted on the mixing flue (2);
The dust collecting (3) is mounted on the dedusting and denitrification apparatus (9) bottom end;
The back-blowing device (6) is mounted on the dedusting and denitrification apparatus (9) inner upper;
The dedusting and denitrification apparatus (9) include dedusting and denitration cell cube (4) and buck plate (5), the dedusting and denitration list First body (4) includes dedusting filtering bag (4-1), bag cage (4-2), catalyst (4-3) and neat stress channel (4-4), the dedusting filtering bag (4-1) is tube structure, and the bag cage (4-2) is supported on the tube structure inner wall, and the catalyst (4-3) is mounted on institute The inside of bag cage (4-2) is stated, the channel that the catalyst (4-3) is constituted is the neat stress channel (4-4);
Dedusting filtering bag (4-1) upper end is equipped with connector, and the connector is the round estrade structure of inner hollow, the round platform The smaller one end of body diameter of movement is fixedly connected with the dedusting filtering bag (4-1) upper port;The other end of the round estrade structure It is fixed on the buck plate (5);
The catalyst (4-3) is SCR catalyst, and the SCR catalyst is pumiceous texture, and the pumiceous texture has three Pore passage structure is tieed up, the porosity of the pumiceous texture is 25~85%;
The running temperature of the dedusting and denitrification integrated device is 160~260 DEG C;
Wherein, the ammonia-gas spraying device (1) includes for conveying the main pipe of ammonia (1-1), multiple branch pipes (1-2), ammonia-spraying grid (1- 3) it is connected by main pipe (1-1) with the branch pipe (1-2) with ammonia-preparing device (1-4), the ammonia-preparing device (1-4), institute Ammonia-spraying grid (1-3) is stated in the mixing flue (2),
The main pipe (1-1) is at least one, and one end of each main pipe (1-1) is connected with the ammonia-preparing device (1-4) It connects, the other end is connected with one end of multiple branch pipes (1-2);Multiple branch pipes (1-2) are disposed in parallel in the mixing Outside, each branch pipe (1-2) is connected with the ammonia-spraying grid (1-3) flue (2), and ammonia-spraying grid (1-3's) sets It sets direction and flow of flue gas direction is angled;Multiple sprays for spraying ammonia are installed on the ammonia-spraying grid (1-3) Ammonia nozzle (1-7), the spray ammonia nozzle (1-7) are evenly distributed on the ammonia-spraying grid (1-3);
First control device (1-5) is installed, in the ammonia-preparing device on the main pipe (1-1) on each main pipe (1-1) The first valve (1-6) is equipped between (1-4) and the first control device (1-5);The first control device (1-5) controls institute State the first valve (1-6) operation;
The second valve (1-8), second valve (1-8) and the ammonia-spraying grid (1- are installed on each branch pipe (1-2) 3) second control device (1-9) is equipped between;The second control device (1-9) controls the second valve (1-8) fortune Row;
The first control device (1-5) and the second control device (1-9) control the ammonia-preparing device (1-4) fortune respectively Row.
2. a kind of dedusting and denitrification integrated device according to claim 1, which is characterized in that the ammonia-spraying grid (1-3) The angle in setting direction and flow of flue gas direction be 0~90 degree.
3. a kind of dedusting and denitrification integrated device according to claim 1, which is characterized in that it is additionally provided with mixer, it is described Mixer is mounted in the mixing duct between the ammonia-gas spraying device (1) and the dedusting and denitrification apparatus (9).
4. a kind of dedusting and denitrification integrated device according to claim 1, which is characterized in that the dust collecting (3) include multiple dust compartments (3-1), multiple dust compartments (3-1) are disposed in parallel in the dedusting and denitrification apparatus (9) bottom End, and communicated with the dedusting and denitrification apparatus (9) inside, the dust compartment (3-1) is the pyramidal structure stood upside down, the collection The upper end dirt storehouse (3-1) is fixed on the dedusting and denitrification apparatus (9) bottom end, and lower end is equipped with closed discharge valve (3-2).
5. a kind of dedusting and denitrification integrated device according to claim 1, which is characterized in that the dedusting and denitrification apparatus (9) further include crust of the device (8) and flue gas flow pass, described device shell (8) inner hollow, buck plate (5) installation In described device shell (8) inner upper, the flue gas is equipped between the buck plate (5) and described device shell (8) top Flow pass;Multiple dedustings and denitration cell cube (4) array are arranged inside described device shell (8) and upper end is fixed on On the buck plate (5), equipped with described on side wall corresponding with flue gas flow pass position on described device shell (8) Exhanst gas outlet is equipped with the smoke inlet on described device shell (8) lower sides.
6. a kind of dedusting and denitrification integrated device according to claim 1, which is characterized in that the work of the SCR catalyst Property group is divided into V2O5-WO3、V2O5-Mo3、V2O5-WO3-Mo3、CeO2-WO3、CeO2-Mo3、CeO2-ZrO2、CeO2-ZrO2-WO3、 CeO2-Mo3Or CeO2-ZrO2-Mo3In any one.
7. a kind of dedusting and denitrification integrated device according to claim 1, which is characterized in that the back-blowing device (6) is Pulse anti-blow device, the Pulse anti-blow device are mounted on above buck plate (5), dedusting filtering bag (4- described in blowing mouth face 1) connector.
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CN105709578B (en) * 2016-03-24 2018-10-30 上海蓝科石化环保科技股份有限公司 A kind of method and system of denitrating flue gas dedusting
CN106110850A (en) * 2016-08-12 2016-11-16 浙江富春江环保热电股份有限公司 A kind of flue gas pollutant minimum discharge system and method
KR101998316B1 (en) * 2019-02-12 2019-07-09 고대동 Module for preventing dust-refly for dust collector and dust collector using the same
CN112121591A (en) * 2020-07-24 2020-12-25 中国科学院过程工程研究所 Low-temperature flue gas activated carbon and catalytic filter tube composite purification process and application thereof

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