CN204093254U - The denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus - Google Patents

The denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus Download PDF

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Publication number
CN204093254U
CN204093254U CN201420539031.XU CN201420539031U CN204093254U CN 204093254 U CN204093254 U CN 204093254U CN 201420539031 U CN201420539031 U CN 201420539031U CN 204093254 U CN204093254 U CN 204093254U
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denitration
denitrating catalyst
thermal desorption
flue gas
spray ammonia
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王充
尹华
郑光明
吕文彬
霍延中
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Acre Coking and Refractory Engineering Consulting Corp MCC
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Acre Coking and Refractory Engineering Consulting Corp MCC
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Abstract

The utility model relates to the denitration of low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus in one, comprise the desulfurization control of dust clean-up stage be integrated in from the bottom to top in a tower body, resolve spray ammonia mixing section and denitration reaction section, described desulfurization control of dust clean-up stage is made up of ash silo, airtight unloading valve, smoke inlet, airflow uniform distribution deflector, filter bag and pulse spraying equipment; Resolve spray ammonia mixing section by spraying ammonia structure, Thermal desorption gas carries injection structure body, mixing current equalizing structure body forms; Denitration reaction section is exported by denitrating catalyst and purifying smoke and forms.Compared with prior art, the beneficial effects of the utility model are: 1) flue gas desulfurization and dedusting, denitration and the integration of denitrating catalyst Thermal desorption; 2) denitrating catalyst long service life; 3) denitration efficiency is high; 4) ammonia and flue gas, high temperature pyrolysis gassing body and smoke contacts abundant; 5) denitrating catalyst can be regenerated by Thermal desorption online; 6) denitrating catalyst soot cleaning system can be omitted.

Description

The denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus
Technical field
The utility model relates to middle low-temperature flue gas desulphurization denitration technical field, particularly relates to the denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus.
Background technology
Flue gas NH 3-SCR method denitration technology is broadly divided into three types by the flue-gas temperature handled by it: the first is high-temperature flue gas denitration, and smoke treatment temperature is 300 ~ 400 DEG C; The second is middle temperature denitrating technique, and smoke treatment temperature is 200 ~ 300 DEG C; The third is low-temperature denitration technique, and smoke treatment temperature is 120 ~ 220 DEG C.
The first high-temperature flue gas denitration technology is worldwide widely used in power plant's denitrating technique, and the second, the third denitration technology are just tried out at present in the denitration of heating fire coal boiler fume, glass furnace flue-gas denitration process.Compared with the first high-temperature flue gas denitration technology, the second and in the third limitation of low-temperature denitration technology be that content of sulfur dioxide in flue gas and water content can produce impact greatly to denitration efficiency.
Traditional handicraft during low-temperature denitration technique, can, at the preposition dry method of denitrating technique or semi-dry desulfurizing process, for removing the particle produced in sweetening process, need establish sack cleaner to carry out filtration, purification to ash-laden gas in employing.But some engineering project, by the restriction in place, cannot arrange sack cleaner and Benitration reactor simultaneously.In addition, small part oxidizing sulfur dioxide can be become sulfur trioxide by low-temperature denitration catalyst, the ammonium hydrogen sulfate that sulfur trioxide and ammonia react generate can condense into emplastic in flue-gas temperature lower than when 230 DEG C, in middle low-temperature denitration technique, and low-temperature denitration efficiency during this emplastic can affect.
Summary of the invention
The utility model provides the denitration of low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus in one, first by there is no desulfurizing agent and the Desulphurization of complete reaction in sock filtration flue gas, flue gas is made fully to contact further desulfurization by during Chalk-dust filtering layer with desulfurizing agent, then ammonia is sprayed in the flue gas after bag filtration after filtration and fully mix with it, then enter air after denitrating catalyst denitration; Establish high temperature pyrolysis analysis apparatus to carry out online Thermal desorption regeneration to denitrating catalyst, in maintenance, low-temperature denitration catalyst continues service life simultaneously; Arranged by filter bag and mixing current equalizing structure body, make velocity of flue gas field and temperature field uniform in the denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus, realize the object of NO_x Reduction by Effective.
In order to achieve the above object, the utility model realizes by the following technical solutions:
The denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus, comprise the desulfurization control of dust clean-up stage be integrated in from the bottom to top in a tower body, resolve spray ammonia mixing section and denitration reaction section, described desulfurization control of dust clean-up stage is made up of ash silo, airtight unloading valve, smoke inlet, airflow uniform distribution deflector, filter bag and pulse spraying equipment; Resolve spray ammonia mixing section by spraying ammonia structure, Thermal desorption gas carries injection structure body, mixing current equalizing structure body forms; Denitration reaction section is exported by denitrating catalyst and purifying smoke and forms.
Described ash silo is positioned at tower body bottom, and airtight unloading valve is arranged on ash silo discharge outlet; Smoke inlet is located on the middle part tower body of desulfurization control of dust clean-up stage, and filter bag is vertically embedding is hung in card hole for many rows, and longitudinally uniform, and airflow uniform distribution deflector is located between smoke inlet and filter bag, and pulse spraying equipment is established on filter bag top.
Described Thermal desorption gas conveying injection structure body is made up of the air supply duct that many be arranged in parallel, and every bar air supply duct all establishes volume damper, uniform orifice feeding mouth on the air supply duct being positioned at tower; Spray ammonia structure is located at above Thermal desorption gas conveying injection structure body, and the spray ammonia pipeline be arranged in parallel by many forms, and every bar spray ammonia pipeline is equipped with spray ammonia control valve, uniform ammonia jet on spray ammonia pipeline; Mixing current equalizing structure body is located at above spray ammonia structure, is made up of the porous plate of 1 ~ 4 layer of curved ripple or angle-style bellows-shaped, and to be separated by 90 ° of angle interlaced arrangement by ripple direction between adjacent two layers.
Described denitrating catalyst is by 2 ~ 4 layers of setting, and purifying smoke outlet is located at top of tower.
In figure: 1. desulfurization control of dust clean-up stage 1a. ash silo 1b. airtight unloading valve 1c. smoke inlet 1d. air flow guiding plate 1e. filter bag 1f. pulse spraying equipment 2. resolves the outlet of spray ammonia mixing section 2a. spray ammonia structure 2b. Thermal desorption gas conveying injection structure body 2c. volume damper 2d. orifice feeding mouth 2e. mixing current equalizing structure body 2f. spray ammonia control valve 3. denitration reaction section 3a. denitrating catalyst 3b. purifying smoke
Compared with prior art, the beneficial effects of the utility model are:
1) realize flue gas desulfurization and dedusting, denitration, denitrating catalyst on-the-spot Thermal desorption regeneration integration, save and once invest, reduce operating cost, reduce floor space;
2) first dedusting before denitration, reduces dust in flue gas by the wearing and tearing to catalyst surface during denitration catalyst oxidant layer, effectively can extend denitrating catalyst service life, reduce denitrating catalyst consumption;
3) by sock filtration layer and all pressures effect mixing current equalizing structure body, uniform in the denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus cross section of flue gas can be realized, make velocity of flue gas field, thermo parameters method more even, improve denitration efficiency further;
4) ammonia is by the spray ammonia mouth jetting device of distributed in grid, and high temperature pyrolysis gassing body is sent in flue gas by orifice plate air outlet, can make ammonia and flue gas, high temperature pyrolysis gassing body and smoke contacts more fully, mix evenly;
5) denitrating catalyst can be regenerated by Thermal desorption online, when not affecting process system and normally working, by utilizing the emplastic on high-temperature flue gas decomposition catalyst surface, cleaning catalyst surface, improves catalytic efficiency and the service life of denitrating catalyst further;
6) the denitrating catalyst soot cleaning system in traditional handicraft can be simplified or omit.
7) flue gas is by sock filtration process, and the desulfurizing agent not participating in reaction under filtering with filter bag outer surface fully contacts, and removing in flue gas while Desulphurization by filter bag, improves the desulfuration efficiency of flue gas further,
Accompanying drawing explanation
Fig. 1 is main pseudosection of the present utility model.
Fig. 2 is side cutaway view of the present utility model.
In figure: 1. desulfurization control of dust clean-up stage 1a. ash silo 1b. airtight unloading valve 1c. smoke inlet 1d. air flow guiding plate 1e. filter bag 1f. pulse spraying equipment 2. resolves the outlet of spray ammonia mixing section 2a. spray ammonia structure 2b. Thermal desorption gas conveying injection structure body 2c. volume damper 2d. orifice feeding mouth 2e. mixing current equalizing structure body 2f. spray ammonia control valve 3. denitration reaction section 3a. denitrating catalyst 3b. purifying smoke
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
See Fig. 1-Fig. 2, it is structural representation of the present utility model, the denitration of low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus in the utility model, comprise the desulfurization control of dust clean-up stage 1 be integrated in from the bottom to top in a tower body, resolve spray ammonia mixing section 2 and denitration reaction section 3, described desulfurization control of dust clean-up stage 1 is made up of ash silo 1a, airtight unloading valve 1b, smoke inlet 1c, airflow uniform distribution deflector 1d, filter bag 1e and pulse spraying equipment 1f; Resolving spray ammonia mixing section 2 carries injection structure body 2b and mixing current equalizing structure body 2e to form by spray ammonia structure 2a, Thermal desorption gas; Denitration reaction section 3 exports 3b by denitrating catalyst 3a and purifying smoke and forms.
Described ash silo 1a is positioned at tower body bottom, and airtight unloading valve 1b is arranged on ash silo 1b discharge outlet; Smoke inlet 1c is located on the middle part tower body of desulfurization control of dust clean-up stage 1, and many row's filter bag 1e are vertically embedding to be hung in card hole, and longitudinally uniform, and airflow uniform distribution deflector 1d is located between smoke inlet 1c and filter bag 1e, and filter bag 1e establishes pulse spraying equipment 1f in top.
Described Thermal desorption gas conveying injection structure body 2b is made up of the air supply duct that many be arranged in parallel, and volume damper 2c all established by every bar air supply duct, uniform orifice feeding mouth 2d on the air supply duct being positioned at tower; Spray ammonia structure is located at above Thermal desorption gas conveying injection structure body 2b, and the spray ammonia pipeline be arranged in parallel by many forms, and every bar spray ammonia pipeline is equipped with spray ammonia control valve 2f, uniform ammonia jet on spray ammonia pipeline; Mixing current equalizing structure body 2e is located at above spray ammonia structure 2a, is made up of the porous plate of 1 ~ 4 layer of curved ripple or angle-style bellows-shaped, and to be separated by 90 ° of angle interlaced arrangement by ripple direction between adjacent two layers.
Described denitrating catalyst 3a is by 2 ~ 4 layers of setting, and purifying smoke outlet 3b is located at top of tower.
Be made up of ash silo 1a and airtight unloading valve 1b bottom desulfurization control of dust clean-up stage 1, airtight unloading valve 1b is located at ash silo 1a discharge outlet.Ash silo 1a is for collecting and storing the particle separated from flue gas, and an effect of airtight unloading valve 1b prevents from extraneous air from infiltrating device inside by discharging opening to reduce flue-gas temperature, and another effect is the dust granules thing that discharge ash silo 1a collects.
Desulfurization control of dust clean-up stage 1 top is made up of smoke inlet 1c, airflow uniform distribution deflector 1d, filter bag 1e, pulse spraying equipment 1f.Smoke inlet 1c is located on the side tower body above desulfurization control of dust clean-up stage 11a, and many row's filter bag 1e are vertically embedding to be hung in desulfurization control of dust clean-up stage 1 card hole, and longitudinally uniform, and airflow uniform distribution deflector 1d is located between smoke inlet 1c and filter bag 1e.Airflow uniform distribution deflector 1d is the labyrinth type structure of angle plate composition, crude separation can be carried out to coarse granule coal dust contained in dirt gas, water conservancy diversion is carried out to ash-laden gas simultaneously, make the air flow method on filter bag 1e surface even, avoid dusty gas directly to wash away filter bag 1e surface, affect filter bag 1e service efficiency and service life.Pulse spraying equipment 1f is located in pure qi (oxygen) region, filter bag 1e top, for carrying out pulse backblowing deashing to filter bag 1e.
Desulfurization control of dust clean-up stage 1 top, for resolving spray ammonia mixing section 2, carries injection structure body 2b and mixing current equalizing structure body 2e to form by spray ammonia structure 2a, Thermal desorption gas.Thermal desorption gas conveying injection structure body 2b is arranged in pulse spraying equipment 1f top, the air supply duct be arranged in parallel by many forms, every bar air supply duct is equipped with volume damper 2c, and the high temperature pyrolysis gassing body being delivered into device interior is evenly delivered to device cross section by the orifice feeding mouth 2d be distributed on air supply duct.Spray ammonia structure 2a is located at Thermal desorption gas conveying injection structure body 2b top, the spray ammonia pipeline be arranged in parallel by many forms, the jet that ammonia conveyance conduit is arranged in latticed layout, every bar spray ammonia pipeline is equipped with spray ammonia control valve 2f on device cross section.Resolve spray ammonia mixing section 2 top and establish mixing current equalizing structure body 2e, mixing current equalizing structure body 2e is made by orifice plate, curved ripple or angle-style bellows-shaped, mixing current equalizing structure body 2e can establish 1 ~ 4 layer, and to be separated by 90 ° of angle interlaced arrangement by ripple direction between adjacent two layers.
Denitration reaction section 3 is located at middle low-temperature flue gas desulfurization and dedusting described in the utility model denitration and denitrating catalyst Thermal desorption integrated apparatus top, exports 3b form by denitrating catalyst 3a, purifying smoke.Denitrating catalyst 3a is made up of 2 ~ 4 structure sheafs.Purifying smoke outlet 3b is located at the top of device, and opening is towards side.
In the utility model, the operation principle of the denitration of low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus is: when equipment runs, ash-laden gas enters desulfurization control of dust clean-up stage 1 by smoke inlet 1c, contact with airflow uniform distribution deflector 1d, big dust particle directly falls into bottom ash silo 1a under effect of inertia, and air-flow is through the water conservancy diversion of airflow uniform distribution deflector 1d, be evenly distributed on the outer surface of filter bag 1e.In flue gas, the desulfurizing agent of non-complete reaction and Desulphurization dust are filtered outward through filter bag 1e, become trapped in the outer surface of filter bag 1e, flue gas is when by dust layer, sulfur dioxide in flue gas and the abundant haptoreaction of unreacted sorbent particle, desulfuration efficiency more than 30% can be improved, by adopting the regular blowing pressurized air of pulse spraying equipment 1f, blow off to ash silo 1a by the particle that filter bag 1e traps, the flue gas through dust-filtering purification then enters parsing spray ammonia mixing section 2.Ammonia is evenly sent in tower by the spray ammonia pipeline of spray ammonia structure 2a, fully mixes contact with flue gas.Under all pressures immixture of mixing current equalizing structure body 2e, flue gas and ammonia Homogeneous phase mixing, make the flue gas entering denitration reaction section 3 be that velocity field and temperature field are uniform at device cross section simultaneously.With the abundant mixed flue gas of ammonia through denitrating catalyst 3a, under the catalytic action of catalyst, reduction of nitrogen oxide is become nitrogen and water by ammonia.Pure qi (oxygen) after denitration flows out from purifying smoke outlet 3b.
When containing sulfur dioxide in flue gas, under the effect of low temperature catalyst, understand some sulfur dioxide and be converted to sulfur trioxide, sulfur trioxide and ammonia react, generate ammonium hydrogen sulfate, thick material can be condensed in flue-gas temperature lower than when 230 DEG C, stick to catalyst surface, reduce effective contact area of flue gas and catalyst, reduce low-temperature denitration catalyst denitration efficiency.Therefore, after low-temperature flue gas runs a period of time by denitrating catalyst 3a, for ensureing that catalyst keeps higher denitration efficiency at flue gas containing under sulfur dioxide condition, Thermal desorption need be carried out to catalyst.By the orifice feeding mouth 2d that Thermal desorption gas transmission pipeline is arranged, high temperature is resolved in gas uniform feeder, high temperature is resolved gas and is fully contacted with flue gas, and under all pressures and immixture of mixing current equalizing structure body 2e Homogeneous phase mixing, air-flow is uniform in the denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus cross section.Through mixing and airflow uniform distribution, temperature be the flue gas of 380 ~ 400 DEG C through denitrating catalyst 3a, the ammonium hydrogen sulfate sticking to catalyst surface can be decomposed, cleaning catalyst surface, thus improve the denitration efficiency of denitrating catalyst, extend its service life.

Claims (4)

1. the denitration of low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus in, it is characterized in that, comprise the desulfurization control of dust clean-up stage be integrated in from the bottom to top in a tower body, resolve spray ammonia mixing section and denitration reaction section, described desulfurization control of dust clean-up stage is made up of ash silo, airtight unloading valve, smoke inlet, airflow uniform distribution deflector, filter bag and pulse spraying equipment; Resolve spray ammonia mixing section by spraying ammonia structure, Thermal desorption gas carries injection structure body, mixing current equalizing structure body forms; Denitration reaction section is exported by denitrating catalyst and purifying smoke and forms.
2. middle low-temperature flue gas desulfurization and dedusting according to claim 1 denitration and denitrating catalyst Thermal desorption integrated apparatus, it is characterized in that, described ash silo is positioned at tower body bottom, and airtight unloading valve is arranged on ash silo discharge outlet; Smoke inlet is located on the tower body of desulfurization control of dust clean-up stage top, and filter bag is vertically embedding is hung in card hole for many rows, and longitudinally uniform, and airflow uniform distribution deflector is located between smoke inlet and filter bag, and pulse spraying equipment is established on filter bag top.
3. middle low-temperature flue gas desulfurization and dedusting according to claim 1 denitration and denitrating catalyst Thermal desorption integrated apparatus, it is characterized in that, described Thermal desorption gas conveying injection structure body is made up of the air supply duct that many be arranged in parallel, every bar air supply duct all establishes volume damper, uniform orifice feeding mouth on the air supply duct being positioned at tower; Spray ammonia structure is located at above Thermal desorption gas conveying injection structure body, and the spray ammonia pipeline be arranged in parallel by many forms, and every bar spray ammonia pipeline is equipped with spray ammonia control valve, uniform ammonia jet on spray ammonia pipeline; Mixing current equalizing structure body is located at above spray ammonia structure, is made up of the porous plate of 1 ~ 4 layer of curved ripple or angle-style bellows-shaped, and to be separated by 90 ° of angle interlaced arrangement by ripple direction between adjacent two layers.
4. middle low-temperature flue gas desulfurization and dedusting according to claim 1 denitration and denitrating catalyst Thermal desorption integrated apparatus, is characterized in that, described denitrating catalyst is by 2 ~ 4 layers of setting, and purifying smoke outlet is located at top of tower.
CN201420539031.XU 2014-09-18 2014-09-18 The denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus Active CN204093254U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104258673A (en) * 2014-09-18 2015-01-07 中冶焦耐工程技术有限公司 Middle-low-temperature flue gas desulfurization, dedusting and denitration and denitration catalyst thermal-desorption integrated device
CN104399371A (en) * 2014-11-20 2015-03-11 中冶焦耐工程技术有限公司 Medium and low temperature denitration, dedusting and thermo-analysis integrated method and device
CN105107330A (en) * 2015-09-17 2015-12-02 福建龙净环保股份有限公司 Integrated device for ultralow emission of flue gas, dust and NOX
CN106823785A (en) * 2017-01-23 2017-06-13 成都中祥天宇环保科技有限公司 A kind of desulfurizing industrial fume denitrification apparatus and method based on NACF
CN108786403A (en) * 2017-05-02 2018-11-13 中国石油化工股份有限公司 A kind of Benitration reactor and denitration sulfur method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104258673A (en) * 2014-09-18 2015-01-07 中冶焦耐工程技术有限公司 Middle-low-temperature flue gas desulfurization, dedusting and denitration and denitration catalyst thermal-desorption integrated device
CN104258673B (en) * 2014-09-18 2016-04-06 中冶焦耐工程技术有限公司 The denitration of middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus
CN104399371A (en) * 2014-11-20 2015-03-11 中冶焦耐工程技术有限公司 Medium and low temperature denitration, dedusting and thermo-analysis integrated method and device
CN105107330A (en) * 2015-09-17 2015-12-02 福建龙净环保股份有限公司 Integrated device for ultralow emission of flue gas, dust and NOX
CN106823785A (en) * 2017-01-23 2017-06-13 成都中祥天宇环保科技有限公司 A kind of desulfurizing industrial fume denitrification apparatus and method based on NACF
CN108786403A (en) * 2017-05-02 2018-11-13 中国石油化工股份有限公司 A kind of Benitration reactor and denitration sulfur method
CN108786403B (en) * 2017-05-02 2021-08-31 中国石油化工股份有限公司 Denitration reactor and denitration and desulfurization method

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Effective date of registration: 20180824

Address after: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning

Patentee after: ACRE Coking And Refractory (Dalian) Engineering Consulting Corp., MCC

Address before: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning

Patentee before: ACRE Coking and Refractory Engineering Consulting Corporation, MCC