CN107961654A - A kind of modular flue gas desulfurization and dedusting denitrification integral processing system - Google Patents
A kind of modular flue gas desulfurization and dedusting denitrification integral processing system Download PDFInfo
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- CN107961654A CN107961654A CN201711215509.8A CN201711215509A CN107961654A CN 107961654 A CN107961654 A CN 107961654A CN 201711215509 A CN201711215509 A CN 201711215509A CN 107961654 A CN107961654 A CN 107961654A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/30—Tungsten
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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Abstract
The present invention relates to a kind of modular flue gas desulfurization and dedusting denitrification integral processing system, belong to fume treatment technical field, the processing system includes desulphurization system and dedusting denitrating system, includes in dedusting denitrating system and is interlocked the catalyst module that the cellular V W Ti catalyst of plug-hole forms as catalyst elements using several both ends.Desulphurization system is placed in dedusting denitrating system front end by the processing system, the sulfur in flue gas is removed using dry desulfurization before denitration, so as to alleviate denitrating catalyst sulfur poisoning problem, further, dedusting denitration is used for the catalyst module, it is efficient with denitration dust collecting, filter area is big, the advantages that installation volume is small, it is final to realize to flue gas while denitration dust collecting, and catalyst compares conventional tubular ceramic membrane filter device in cellular, provide more surface areas, advantageously reduce catalyst usage amount, reduce cost of investment, and honeycombed catalyst monomer is used into modularization assembling, easy to in-site installation, industrialization easy to implement.
Description
Technical field
The invention belongs to fume treatment technical field, and in particular to a kind of modular flue gas desulfurization and dedusting denitrification integral
Processing system.
Background technology
Contain dust, nitrogen oxides and sulfur dioxide in the flue gas of Industrial Stoves particularly coal-burning boiler, above-mentioned flue gas into
A series of atmosphere pollution phenomenons such as haze, acid rain can be caused by point being discharged into air, so as to threaten ecological environment and health.With
To the increasingly stringent of Air Pollution Control job requirement, flue gas desulfurization, denitration, dedusting technology are also constantly being removed from office for country in recent years
Newly, at present, the technological process of the widely applied desulphurization denitration dedusting in coal-burning power plant is：SCR denitration (catalyst be generally it is board-like or
Honeycomb fashion V-W-Ti System Catalysts)-dedusting (using the dust collecting process such as bag-type dusting, cyclone dust removal, electric precipitation)-wet method takes off
Sulphur (limestone-gypsum method), but the respective independent operating of above three process, equipment volume is huge, and complicated, therefore energy consumption
It is higher, take up a large area.In addition SCR denitration is usually placed in technique front end by traditional handicraft, in During Process of Long-term Operation, cigarette
SO in gas2, flue dust etc. can cause denitrating catalyst to inactivate, and then largely effect on the service life of catalyst.
Flue gas desulfurization denitration dust-removing integrated device and technique disclosed in patent CN104667715A, its shortcoming mainly have,
Dedusting denitration is placed on technique front end, it is difficult to avoid denitrating catalyst poisoning problem；, will to flue gas flow rate using fluidized bed denitration
Ask higher, add energy consumption；In addition, dust removing tube can enter denitrating catalyst, influence to take off in powder denitrating catalyst upper end, flue dust
Nitre efficiency.
Coal-fired flue-gas dust-removing and desulfurization denitrification integral combination process system disclosed in patent CN105233644A, but the technique
Ceramic tube, ceramic filter membrane are used in system, cost is higher, and the processing step is numerous and diverse, is not suitable for extensive use
Therefore, it is badly in need of at a kind of desulphurization denitration dedusting small, operation is easy, cost of investment is low, performance is stablized of exploitation
Reason system replaces complicated, the huge desulphurization denitration dust collecting process of tradition.
The content of the invention
In view of this, it is an object of the invention to provide a kind of modular flue gas desulfurization and dedusting denitrification integral processing system
System.
To reach above-mentioned purpose, the present invention provides following technical solution：
1st, a kind of modular flue gas desulfurization and dedusting denitrification integral processing system, the system include desulphurization system and remove
Dirt denitrating system, the desulphurization system are arranged on the dedusting denitrating system front end；
The desulphurization system includes desulfurizing tower, nozzle and lime tank, and the nozzle is arranged on desulfurizing tower internal upper part, passes through pipe
Road is connected with the lime tank being arranged on outside desulfurizing tower, and the outer lower part of desulfurizing tower is provided with smoke inlet, and the smoke inlet passes through
Pipeline is connected with the boiler being arranged on outside desulfurizing tower；
The dedusting denitrating system includes reaction warehouse and the integrated catalyst module being arranged in the reaction warehouse, described
Integrated catalyst module is assembled by several catalyst elements, and the catalyst elements are interlocked the honeycomb of plug-hole for both ends
Shape V-W-Ti catalyst；
The desulfurizing tower is connected with reaction warehouse by being connected flue, and spray ammonia system is set on the connection flue.
Further, desulfurization is carried out by dry method in the desulphurization system.
Further, the integrated catalyst module assembled in a manner of matrix arrangement by several catalyst elements and
Into.
Further, the both ends interlock plug-hole cellular V-W-Ti catalyst in each duct wall surface be coated with 0.1mm-
The cao layers of 2mm.
Further, the mode of the coating is one kind in dip-coating or spraying.
Further, the both ends interlock plug-hole cellular V-W-Ti catalyst in the porositys of each cell walls be 60-
75%.
Further, the interlock cellular V-W-Ti catalyst back pressure of plug-hole of the both ends is less than 2000Pa.
Further, by mass percentage, the both ends interlock plug-hole cellular V-W-Ti catalyst in include 0.3-
5wt%V2O5And 0.8-8wt%WO3。
Further, it is silica flour or glutinous for the interlock plug-hole material of cellular V-W-Ti catalyst plug-hole of plug-hole of the both ends
Soil and high-temperature agglomerant in mass ratio 1：1-5 is mixed.
Further, the high-temperature agglomerant is one in high temperature resistant glue, lithotome special inorganic glue or high temperature clay
Kind.
Further, the high-temperature agglomerant is high temperature resistant glue SL8303, lithotome special inorganic glue TW26641 or high
One kind in warm clay PA-80.
The beneficial effects of the present invention are：At a kind of modular flue gas desulfurization and dedusting denitrification integral
Desulphurization system is placed in dedusting denitrating system front end, smoke abatement is removed using dry desulfurization before denitration by reason system, the processing system
Sulfur in gas, so as to alleviate denitrating catalyst sulfur poisoning problem, further, is interlocked the cellular of plug-hole with several both ends
V-W-Ti catalyst as catalyst elements composition catalyst module be used for dedusting denitration, have denitration dust collecting it is efficient, filter
The advantages that area is big, installation volume is small, it is final to realize to flue gas while denitration dust collecting.Wherein, interlocked using both ends the bee of plug-hole
Nest shape V-W-Ti catalyst, can be such that flue gas enters from the catalyst one end, by the phase in the hole being not closed out on its arrival end
Adjacent hole side wall, fully filters flue gas using side wall, removes flue dust.So not only achieve the purpose that dedusting, also extend flue gas and exist
Residence time in catalyst, adds the contact area of flue gas and catalyst, improves catalyst efficiency.And catalyst is in bee
Nest shape compares conventional tubular ceramic membrane filter device, there is provided more surface areas, advantageously reduce catalyst usage amount, reduce
Cost of investment, and honeycombed catalyst monomer uses modularization assembling, easy to in-site installation, industrialization easy to implement.Meanwhile should
Both ends interlock plug-hole cellular V-W-Ti catalyst in each duct wall surface be coated with 0.1mm-2mm cao layers, not only
Filtering accuracy can be improved, prevents the duct on soot dust granule blocking catalyst hole wall, additionally it is possible to aids in desulfurization, and passes through limit
The porosity of fixed each cell walls of the catalyst, can make that it is suitable for make, it is suitable for the dedusting of various particle diameter dusts, finally to reach
To the purpose of denitration dust collecting at the same time.Investment and operating cost the process reduces equipment, and floor space is small, operation is more steady
It is fixed, greatly reduce power plant, the environmental protection investments expense and operating cost that industrial furnace smoke is administered.
Brief description of the drawings
In order to make the purpose of the present invention, technical solution and beneficial effect clearer, the present invention provides drawings described below and carries out
Explanation：
Fig. 1 is modular flue gas desulfurization and dedusting denitrification integral processing system schematic diagram in the present invention；
Fig. 2 be the present invention in both ends interlock plug-hole cellular V-W-Ti catalyst stereogram schematic diagram；
Fig. 3 is that both ends interlock the cellular V-W-Ti catalyst end face schematic diagram of plug-hole in the present invention；
Fig. 4 is that both ends interlock the cellular V-W-Ti catalyst other end schematic diagram of plug-hole in the present invention；
Fig. 5 is that both ends interlock the cellular V-W-Ti catalyst nobumichi hole extending direction sectional drawing of plug-hole in the present invention；
Fig. 6 is integrated catalyst module schematic perspective view in the present invention；
Wherein, in Fig. 1：1 is boiler, and 2 be desulfurizing tower, and 3 be nozzle, and 4 be lime tank, and 5 be spray ammonia system, and 6 be reaction warehouse,
7 being integrated catalyst modules.
Embodiment
The preferred embodiment of the present invention will be described in detail below.
Fig. 1 is modular flue gas desulfurization and dedusting denitrification integral processing system schematic diagram in the present invention, as shown in Figure 1,
The system includes desulphurization system and dedusting denitrating system, and the desulphurization system is arranged on the dedusting denitrating system front end；Institute
Stating desulphurization system includes desulfurizing tower 2, nozzle 3 and lime tank 4, and the nozzle 3 is arranged on 2 internal upper part of desulfurizing tower, by pipeline with
It is arranged on the lime tank 4 outside desulfurizing tower 2 to connect, the outer lower part of desulfurizing tower is provided with smoke inlet, and the smoke inlet passes through pipe
Road is connected with the boiler 1 being arranged on outside desulfurizing tower 2；The dedusting denitrating system includes reaction warehouse 6 and is arranged on the reaction
Integrated catalyst module 7 in storehouse；The desulfurizing tower 2 is connected with reaction warehouse 6 by being connected flue, is set on the connection flue
Put spray ammonia system 5.
Prepare three kinds of both ends to interlock the cellular V-W-Ti catalyst of plug-hole, be respectively catalyst 1, catalyst 2 and catalysis
Agent 3, the schematic perspective view of catalyst 1-3 is as shown in Fig. 2, set three kinds of catalyst one end as arrival end, arrival end end face such as Fig. 3
Shown, the other end is the port of export, port of export end face as shown in figure 4, catalyst nobumichi hole extending direction sectional drawing as shown in figure 5,
As shown in Figure 5, it is unclosed by the catalyst elements port of export when flue gas enters from the unclosed through hole of catalyst elements arrival end
Through hole come out, flue gas enter catalyst after, by catalyst side wall, flue gas is fully filtered using side wall, reaches while removes
The out of stock purpose of dirt.Wherein, 1.5wt%V is included in catalyst 12O5And 4wt%WO3, open pore rate 67.8%, back pressure is less than
2000Pa, the thickness of cao layers are 0.5mm, and when preparation, plug-hole material used was by silica flour and lithotome special inorganic glue
TW26641 in mass ratio 1：4 mix；0.35wt%V is included in catalyst 22O5And 3wt%WO3, open pore rate is
62.5%, back pressure is less than 2000Pa, and the thickness of cao layers is 1.2mm, and when preparation, plug-hole material used was by silica flour and high-temp glue
Mud PA-80 in mass ratio 1：5 mix；4.5wt%V is included in catalyst 32O5And 7.8wt%WO3, open pore rate is
70%, back pressure is less than 2000Pa, and the thickness of cao layers is 0.8mm, and when preparation, plug-hole material used was by clay and high-temperature plastic
Water SL8303 in mass ratio 1：3 mix.
Embodiment 1
Using catalyst 1 as catalyst elements, the being assembled integrally catalyst module in a manner of matrix arrangement, the one
Change catalyst module schematic perspective view to take off as shown in fig. 6, the integration catalyst module is respectively arranged in modular flue gas
In reaction warehouse 6 in sulphur dedusting denitrification integral processing system in dedusting denitrating system, then by closed conduct by boiler 1
The flue gas of generation is passed through in desulfurizing tower 2, and flue gas is in flow process, and the calcium oxide sprayed with nozzle 3 contacts, substantial amounts of titanium dioxide
Sulphur reacts the removal so as to fulfill sulfur dioxide in flue gas with calcium oxide, and removal efficiency is more than 75%.
Flue gas after desulfurization process enters in reaction warehouse 6 at the same time through connecting flue and spraying the ammonia sprayed in ammonia system 5,
When flue gas enters from the unclosed through hole of each catalyst elements arrival end, gone out by the unclosed through hole of the catalyst elements port of export
Come, after flue gas enters catalyst, by each through-hole side wall in catalyst elements, fully filter flue gas using side wall, make flue gas
In dust be trapped, meanwhile, the cao layers of each duct wall surface coating in catalyst elements, it is therefore prevented that soot dust granule blocks
Duct on catalyst elements hole wall, and desulfurization is aided in, possible remaining sulfur dioxide during dry desulfurization is removed, at the same time
NO in flue gasxAnd NH3、O2React in catalyst elements active sites, remove the NO in flue gasx, realize that synchronous denitration removes
Dirt, will finally arrange outside the flue gas after above-mentioned processing is up to standard, and the efficiency of dust collection of the final processing system is 99.3%, denitration efficiency
For 85.6%.
Embodiment 2
Using catalyst 2 as catalyst elements, the being assembled integrally catalyst module in a manner of matrix arrangement, with reference to real
The method in example 1 is applied, the efficiency of dust collection of the final processing system is 99.8%, denitration efficiency 80.2%.
Embodiment 3
Using catalyst 3 as catalyst elements, the being assembled integrally catalyst module in a manner of matrix arrangement, with reference to real
The method in example 1 is applied, the efficiency of dust collection of the final processing system is 99.5%, denitration efficiency 90.6%.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (10)
1. a kind of modular flue gas desulfurization and dedusting denitrification integral processing system, the system includes desulphurization system and dedusting takes off
Nitre system, it is characterised in that the desulphurization system is arranged on the dedusting denitrating system front end；
The desulphurization system includes desulfurizing tower, nozzle and lime tank, and the nozzle is arranged on desulfurizing tower internal upper part, by pipeline with
The lime tank connection being arranged on outside desulfurizing tower, the outer lower part of desulfurizing tower are provided with smoke inlet, and the smoke inlet passes through pipeline
Connected with the boiler being arranged on outside desulfurizing tower；
The dedusting denitrating system includes reaction warehouse and the integrated catalyst module being arranged in the reaction warehouse, the one
Change catalyst module by several catalyst elements to be assembled, the catalyst elements are interlocked the cellular V- of plug-hole for both ends
W-Ti catalyst；
The desulfurizing tower is connected with reaction warehouse by being connected flue, and spray ammonia system is set on the connection flue.
A kind of 2. modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 1, it is characterised in that
Desulfurization is carried out by dry method in the desulphurization system.
A kind of 3. modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 1, it is characterised in that
The integration catalyst module is assembled by several catalyst elements in a manner of matrix arrangement.
A kind of 4. modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 1, it is characterised in that
The both ends interlock plug-hole cellular V-W-Ti catalyst in each duct wall surface be coated with 0.1mm-2mm cao layers.
A kind of 5. modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 4, it is characterised in that
The mode of the coating is one kind in dip-coating or spraying.
A kind of 6. modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 1, it is characterised in that
The both ends interlock plug-hole cellular V-W-Ti catalyst in the porositys of each cell walls be 60-75%.
A kind of 7. modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 1, it is characterised in that
The interlock back pressure of cellular V-W-Ti catalyst of plug-hole of the both ends is less than 2000Pa.
A kind of 8. modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 1, it is characterised in that
By mass percentage, the both ends interlock plug-hole cellular V-W-Ti catalyst in include 0.3-5wt%V2O5And 0.8-
8wt%WO3。
9. a kind of such as modular flue gas desulfurization and dedusting denitrification integral processing system of claim 1-8 any one of them, its
Be characterized in that, for the both ends interlock the cellular V-W-Ti catalyst plug-hole of plug-hole plug-hole material for silica flour or clay with it is high
Warm binding agent in mass ratio 1：1-5 is mixed.
10. a kind of modular flue gas desulfurization and dedusting denitrification integral processing system as claimed in claim 9, its feature exist
In the high-temperature agglomerant is one kind in high temperature resistant glue, lithotome special inorganic glue or high temperature clay.
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| CN201711215509.8A CN107961654A (en) | 2017-11-28 | 2017-11-28 | A kind of modular flue gas desulfurization and dedusting denitrification integral processing system |
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| CN201711215509.8A CN107961654A (en) | 2017-11-28 | 2017-11-28 | A kind of modular flue gas desulfurization and dedusting denitrification integral processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113457667A (en) * | 2021-07-16 | 2021-10-01 | 国家电投集团远达环保催化剂有限公司 | Denitration and dust removal integrated catalyst and preparation method thereof |
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| CN102319559A (en) * | 2011-06-03 | 2012-01-18 | 中国科学院过程工程研究所 | Surface deposition honeycomb flue gas denitration catalyst and preparation method thereof |
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| CN102319559A (en) * | 2011-06-03 | 2012-01-18 | 中国科学院过程工程研究所 | Surface deposition honeycomb flue gas denitration catalyst and preparation method thereof |
| CN105148696A (en) * | 2015-08-11 | 2015-12-16 | 南京中电环保科技有限公司 | Denitration and dust removal system and method for industrial kiln gas |
| CN205461812U (en) * | 2016-01-11 | 2016-08-17 | 北京亚太环保股份有限公司 | Poisoning system is prevented to low temperature denitration catalyst |
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| CN113457667A (en) * | 2021-07-16 | 2021-10-01 | 国家电投集团远达环保催化剂有限公司 | Denitration and dust removal integrated catalyst and preparation method thereof |
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