CN106422569A - Compact type high-efficiency medium-low-temperature flue gas desulfurization, dust removal, denitration and pyrolyzation integrated device - Google Patents

Compact type high-efficiency medium-low-temperature flue gas desulfurization, dust removal, denitration and pyrolyzation integrated device Download PDF

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Publication number
CN106422569A
CN106422569A CN201610908282.4A CN201610908282A CN106422569A CN 106422569 A CN106422569 A CN 106422569A CN 201610908282 A CN201610908282 A CN 201610908282A CN 106422569 A CN106422569 A CN 106422569A
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China
Prior art keywords
ammonia
fluid layer
denitration
orifice plate
desulfurization
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CN201610908282.4A
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Chinese (zh)
Inventor
霍延中
尹华
孙刚森
王充
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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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Priority to CN201610908282.4A priority Critical patent/CN106422569A/en
Publication of CN106422569A publication Critical patent/CN106422569A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04Cleaning filters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/60Simultaneously removing sulfur oxides and nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76Gas phase processes, e.g. by using aerosols
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • B01D53/8628Processes characterised by a specific catalyst
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • B01D53/8631Processes characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/96Regeneration, reactivation or recycling of reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The invention relates to a compact type high-efficiency medium-low-temperature flue gas desulfurization, dust removal, denitration and pyrolyzation integrated device which comprises desulfurization and dust collection purification sections, a pyrolyzation ammonia injection mixing section and a denitration reaction section, wherein the two groups of desulfurization and dust collection purification sections are distributed side by side and share the same pyrolyzation ammonia injection mixing section and the denitration reaction section; the desulfurization and dust collection purification sections are provided with air flow uniform distribution and guide structure bodies; each air flow uniform distribution and guide structure body is composed of an inlet flow guide plate arranged between a flue gas inlet and a filter bag and a uniform distribution flow guide body arranged in an ash hopper under the filter bag; the pyrolyzation ammonia injection mixing section is provided with an ammonia injection structure body, a pyrolyzation gas delivery and injection structure body and a mixed flow equalizing structure body; the ammonia injection structure body is composed of an ammonia buffer chamber, a flange connection pipe and an ammonia injection branch pipe; the pyrolyzation gas delivery and injection structure body is composed of a pyrolyzation gas buffer chamber, a flow adjusting short pipe and a pyrolyzation gas branch pipe; the mixed flow equalizing structure body is composed of a hole-plate flow equalizing layer and a foam-metal flow equalizing layer. The compact type high-efficiency medium-low-temperature flue gas desulfurization, dust removal, denitration and pyrolyzation integrated device is compacter is structure and higher in flue gas treatment efficiency.

Description

Low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient
Technical field
The present invention relates to low-temperature flue gas in middle low-temperature flue gas desulphurization denitration technical field, more particularly to a kind of compact high efficient Desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device.
Background technology
Flue gas NH3Low-temperature denitration technique in-SCR method, handled flue-gas temperature is less than 300 DEG C, in this temperature range, flue gas In content of sulfur dioxide and water content can to denitration efficiency produce strong influence.The underway low-temperature denitration of traditional handicraft When, dry method or semi-dry desulfurizing process can be set before denitrating technique.Need after desulfurization to set sack cleaner to particulate matter containing desulfurization Smoke filtration dedusting.
But some engineering projects are limited by place, it is impossible to while arranging sack cleaner and Benitration reactor.In addition, low temperature Small part oxidizing sulfur dioxide can be become sulfur trioxide by denitrating catalyst, and sulfur trioxide reacts the ammonium sulfate that generates with ammonia can be Flue-gas temperature condenses into emplastic in the case of being less than 230 DEG C, is attached to catalyst surface, has a strong impact on denitration efficiency.
The Chinese patent of Application No. 201410478420.0 discloses a kind of " middle low-temperature flue gas desulfurization and dedusting denitration and de- Denox catalyst Thermal desorption integrated apparatus ", including be integrated in a tower body from the bottom to top desulfurization dust clean-up stage, parsing spray Ammonia mixing section and denitration reaction section;The desulfurizing agent and Desulphurization not reacted completely in sock filtration flue gas is first passed through, makes flue gas By further desulfurization being fully contacted with desulfurizing agent during Chalk-dust filtering layer, then ammonia is sprayed into the flue gas after sock filtration In be sufficiently mixed with which, then enter air after denitrating catalyst denitration;While setting high temperature pyrolysis analysis apparatus to denitrating catalyst Online Thermal desorption (being also referred to as pyrolyzed) regeneration is carried out, in holding, low-temperature denitration catalyst continues service life.The patent is achieved Flue gas desulfurization and dedusting, denitration, the Thermal desorption regeneration integration of denitrating catalyst scene, save and once invest, reduce operating cost, subtract Few floor space.
Content of the invention
The invention provides low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in a kind of compact high efficient, On the basis of the denitration of original middle low-temperature flue gas desulfurization and dedusting and denitrating catalyst Thermal desorption integrated apparatus, one group of desulfurization has been added Dust clean-up stage, makes structure compacter, greatly improves fume treatment efficiency;Meanwhile, to airflow uniform distribution flow-guiding structure body, spray ammonia Structure, pyrolysis gas conveying injection structure body and mixing current equalizing structure body have carried out technological improvement, make flue gas in tower body, ammonia Air and heat solution gas is more evenly distributed, and mixing is more abundant, improves fume treatment efficiency further.
In order to achieve the above object, the present invention employs the following technical solutions realization:
Low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient, including being integrated in from the bottom to top Desulfurization dust clean-up stage in one tower body, pyrolysis spray ammonia mixing section and denitration reaction section, the desulfurization dust clean-up stage is by ash Storehouse, smoke inlet, airflow uniform distribution flow-guiding structure body, filter bag and pulse spraying equipment composition;Pyrolysis spray ammonia mixing section is tied by ammonia is sprayed Structure body, pyrolysis gas conveying injection structure body and mixing current equalizing structure body composition;Denitration reaction section is by denitrating catalyst and purification Exhanst gas outlet constitutes;The desulfurization dust clean-up stage is arranged side by side for 2 groups, shares a pyrolysis spray ammonia mixing section and denitration reaction Section;The airflow uniform distribution flow-guiding structure body by the entrance guiding plate being arranged between smoke inlet and filter bag and is arranged on filter bag Uniform baffle composition in the ash silo of lower section;The spray ammonia structure is by ammonia surge chamber, flange connections and spray ammonia arm group Become;The pyrolysis gas conveying injection structure body is made up of pyrolysis gas surge chamber, Flow-rate adjustment short tube and pyrolysis gas arm; The mixing current equalizing structure body is by the equal fluid layer of the orifice plate being arranged on perpendicular to airflow direction in tower body and the equal fluid layer group of foam metal Become.
The pyrolysis spray ammonia mixing section and denitration reaction section are arranged on wherein 1 group top of 2 groups of desulfurization dust clean-up stage, separately Outer 1 group of desulfurization dust clean-up stage top is coupled logical;The L-shaped arrangement of overall structure.
The desulfurization dust clean-up stage includes the straight section tower body on top and the ash silo of bottom;2 groups of desulfurization dust clean-up stage Straight section tower body bottom sets smoke inlet respectively, and 2 smoke inlets are oppositely arranged.
In the straight section tower body of the desulfurization dust clean-up stage, filter bag is vertically embedding to be hung on card in the hole, uniform in multiple rows of, row, Filter bag top sets pulse spraying equipment;The entrance guiding plate is be arranged in parallel with filter bag, between entrance guiding plate and smoke inlet Gas channel upper/lower terminal be respectively communicated with straight section tower body and ash silo;Uniform baffle is made up of one to multiple piece of uniform deflector, Uniform deflector is obliquely installed, and which is 0~45 ° with the angle of vertical direction, and is inclined away from smoke inlet one end downwards;Enter Mouth deflector, uniform baffle are respectively along the straight section tower body of desulfurization dust clean-up stage or the elongated setting of the respective side of ash silo.
By multiple reinforcement link of boards between the uniform deflector and the bulkhead of ash silo, uniform deflector be straight panel or Bent plate;Uniform deflector for multiple when, be along inclined direction stepped arrangement, between each uniform deflector, uniform deflector and Connected by connecting plate between grey silo wall, form the stereoeffect with enclosed, outer surface.
The ammonia surge chamber of the spray ammonia structure is used for the temporary buffer of ammonia, and realizes malleation, negative pressure spray ammonia;Flange Connecting tube is used for connecting ammonia surge chamber and spray ammonia arm, and spray ammonia structure is in pyrolysis spray ammonia mixing section tower body Support member;Spray ammonia arm is uniformly arranged in juxtaposition for multiple, which is provided with spray ammonia hole or ammonia nozzle, for spraying ammonia.
The pyrolysis gas surge chamber is used for external heat source to be introduced the buffering before pyrolysis gas arm;Flow-rate adjustment is short Manage for connecting pyrolysis gas surge chamber and pyrolysis gas arm, and control pressure and the flow of pyrolysis gas;Pyrolysis gas are propped up Manage as square-section gradient tube, and its heavy in section one end is connected with Flow-rate adjustment short tube;Pyrolysis gas arm is provided with gas spray Perforation, multiple pyrolysis gas arms are uniformly arranged in juxtaposition, respectively by corresponding Flow-rate adjustment short tube and pyrolysis gas surge chamber Connection, sets flow regulator on Flow-rate adjustment short tube.
The ammonia surge chamber is arranged along the orientation of spray ammonia arm, and is hung down with each spray ammonia arm by flange connections Direct-connected logical;Ammonia surge chamber is 1~2, when ammonia surge chamber is 2, is arranged in the both sides of spray ammonia arm;The pyrolysis Gas buffer room is arranged along the orientation of pyrolysis gas arm, and vertical with each pyrolysis gas arm by Flow-rate adjustment short tube Connection;Pyrolysis gas surge chamber is 1~2, when pyrolysis gas surge chamber is 2, is arranged in the two of pyrolysis gas arm Side.
The equal fluid layer of the orifice plate is made up of the equal fluid layer still of orifice plate and the equal fluid layer moving plate of orifice plate;The equal fluid layer still of orifice plate and hole The equal fluid layer moving plate of plate is disposed adjacent, and opens up in correspondence position and multiple all flow on the equal fluid layer still of orifice plate and the equal fluid layer moving plate of orifice plate Hole, the equal fluid layer moving plate of orifice plate can transversely and longitudinal short distance is slided, and can change after sliding its with the equal fluid layer still of orifice plate on The registration of the equal discharge orifice of correspondence.
The equal fluid layer of the foam metal is arranged on any side of the equal fluid layer of orifice plate, between which is provided between the equal fluid layer of orifice plate Every the equal fluid layer of foam metal is made up of foam metal, is flat board or folding slab structure;The equal fluid layer moving plate of orifice plate and the equal fluid layer of orifice plate On still, the percent opening of equal discharge orifice is 20~60%, the equal discharge orifice of diverse location on the equal fluid layer moving plate of orifice plate or the equal fluid layer still of orifice plate Percent opening can be different, but on the equal fluid layer moving plate of orifice plate and the equal fluid layer still of orifice plate the equal discharge orifice of correspondence position percent opening phase With;All discharge orifice be shaped as square, circular, oval or triangle, on the equal fluid layer moving plate of orifice plate or the equal fluid layer still of orifice plate not Can be different with the equal discharge orifice shape at position, but the equal discharge orifice shape of corresponding position is identical.
Compared with prior art, the invention has the beneficial effects as follows:
1) flue gas desulfurization and dedusting, denitration, the pyrolysis regeneration integration of denitrating catalyst scene is realized, is saved and once invest;
2) L-shaped cramped construction is adopted, floor space is greatly reduced, and a large amount of steel structure materials are saved, mitigates weight of equipment, bright Aobvious reduction cost of equipment and civil engineering costs;
3) 2 desulfurization dust clean-up stage share 1 pyrolysis spray ammonia mixing section and denitration reaction section, simplify top tower body knot Structure, reduces equipment consumptive material and loading;
4) first dedusting before denitration, exempts abrasion of the dust to catalyst, effectively extends catalyst life;
5) under all pressures effect of sock filtration layer and mixing current equalizing structure body, flue gas is uniform on cross section in tower body, Make velocity field, thermo parameters method evenly, improve denitration efficiency further;
6) spray ammonia structure can malleation spray ammonia also can negative pressure-pumping ammonia, be provided with ammonia surge chamber, pyrolysis gas are defeated Injection structure body is sent also to be provided with pyrolysis gas surge chamber, it is ensured that uniform in ammonia or pyrolysis gas injection, at utmost Reduce system pressure and temperature fluctuation, it is ensured that system stability, effectively operation;
7) using spray ammonia structure and pyrolysis gas conveying injection structure body can make ammonia and flue gas, high temperature pyrolysis gas with The contact of flue gas is more abundant, and mixing is evenly;
8) regeneration denitrating catalyst can be pyrolyzed online, does not affect process system normal work;Decomposed using high-temperature flue gas and urge The emplastic on agent surface, cleaning catalyst surface, improve catalytic efficiency and service life further;
9) can simplify or omit the denitrating catalyst soot cleaning system in traditional handicraft.
10) flue gas is carried further by sulfur dioxide during filter bag and the unreacted desulfurizing agent secondary response of filter bag outer surface The desulfuration efficiency of high flue gas.
Description of the drawings
Fig. 1 is the master of low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient of the present invention View.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the front view of airflow uniform distribution flow-guiding structure body of the present invention.
Fig. 4 is the side view of Fig. 3.
Fig. 5 is the schematic diagram one of spray ammonia structure of the present invention.(1 ammonia surge chamber is set)
Fig. 6 is the schematic diagram two of spray ammonia structure of the present invention.(2 ammonia surge chambers are set)
Fig. 7 is the schematic diagram one that pyrolysis gas of the present invention convey injection structure body.(1 pyrolysis gas buffering is set Room)
Fig. 8 is the schematic diagram two that pyrolysis gas of the present invention convey injection structure body.(2 pyrolysis gas bufferings are set Room)
Fig. 9 is the front view of mixing current equalizing structure body of the present invention.
Figure 10 is the side view of Fig. 9.
In figure:1. 101. 102. closed unloading valve of ash silo, 103. smoke inlet of desulfurization dust clean-up stage, 104. entrance is led 107. pulse spraying equipment of stream plate 105. uniform baffle, 106. filter bag 2. is pyrolyzed spray ammonia mixing section 210. and sprays ammonia structure 211. ammonia surge chamber, 212. flange connections 213. spray 220. pyrolysis gas conveying injection structure body of ammonia arm, 221. heat 223. pyrolysis gas arm of solution gas 222. Flow-rate adjustment short tube of surge chamber 230. mixes 231. foam gold of current equalizing structure body Belong to equal 3. denitration reaction section of fluid layer still, 301. denitrating catalyst of equal 233. orifice plate of fluid layer moving plate of 232. orifice plate of equal fluid layer 302. purifying smokes are exported
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further:
As shown in Figure 1 and Figure 2, low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated in compact high efficient of the present invention Device, including the desulfurization dust clean-up stage 1, pyrolysis spray ammonia mixing section 2 and the denitration reaction that are integrated in a tower body from the bottom to top Section 3, the desulfurization dust clean-up stage 1 is by ash silo 101, smoke inlet 103, airflow uniform distribution flow-guiding structure body, filter bag 106 and pulse Blowing device 107 constitutes;Pyrolysis spray ammonia mixing section 2 by spray ammonia structure 210, pyrolysis gas conveying injection structure body 220 and is mixed Close current equalizing structure body 230 to constitute;Denitration reaction section 3 is made up of denitrating catalyst 301 and purifying smoke outlet 302;The desulfurization Dust clean-up stage 1 is arranged side by side for 2 groups, shares a pyrolysis spray ammonia mixing section 2 and denitration reaction section 3;The airflow uniform distribution is led Flow structure body by the entrance guiding plate 104 being arranged between smoke inlet 103 and filter bag 106 and is arranged on 106 lower section of filter bag Uniform baffle 105 in ash silo 101 constitutes;The spray ammonia structure 210 is by ammonia surge chamber 211,212 and of flange connections Spray ammonia arm 213 constitutes;The pyrolysis gas conveying injection structure body 220 is by pyrolysis gas surge chamber 221, Flow-rate adjustment short tube 222 and pyrolysis gas arm 223 constitute;The mixing current equalizing structure body 230 is by being arranged in tower body perpendicular to airflow direction The equal fluid layer of orifice plate and the equal fluid layer 231 of foam metal constitute.
The pyrolysis spray ammonia mixing section 2 and denitration reaction section 3 are arranged on wherein 1 group top of 2 groups of desulfurization dust clean-up stage 1 Portion, in addition 1 group of 1 top of desulfurization dust clean-up stage is coupled logical;The L-shaped arrangement of overall structure.
The desulfurization dust clean-up stage 1 includes the straight section tower body on top and the ash silo 101 of bottom;2 groups of desulfurization dusts are purified The straight section tower body bottom of section 1 sets smoke inlet 103 respectively, and 2 smoke inlets 103 are oppositely arranged.
As shown in Figure 3, Figure 4, in the straight section tower body of the desulfurization dust clean-up stage 1, filter bag 106 is vertically embedding to be hung on card hole Interior, uniform in multiple rows of, row, 106 top of filter bag sets pulse spraying equipment 107;The entrance guiding plate 104 is parallel with filter bag 106 Arrange, the gas channel upper/lower terminal between entrance guiding plate 104 and smoke inlet 103 is respectively communicated with straight section tower body and ash silo 101;Uniform baffle 105 is made up of one to multiple piece of uniform deflector, and uniform deflector is obliquely installed, its folder with vertical direction Angle is 0~45 °, and is inclined away from 103 one end of smoke inlet downwards;Entrance guiding plate 104, uniform baffle 105 edge respectively The elongated setting of the respective side of the straight section tower body of desulfurization dust clean-up stage 1 or ash silo 101.
By multiple reinforcement link of boards between the uniform deflector and the bulkhead of ash silo 101, uniform deflector is straight Plate or bent plate;Uniform deflector for multiple when, be along inclined direction stepped arrangement, between each uniform deflector, uniform water conservancy diversion It is connected by connecting plate between plate and 101 bulkhead of ash silo, forms the stereoeffect with enclosed, outer surface.
As shown in Figure 5, Figure 6, the ammonia surge chamber 211 of the spray ammonia structure 210 is used for the temporary buffer of ammonia, and real Existing malleation, negative pressure spray ammonia;Flange connections 212 are used for connecting ammonia surge chamber 211 and spray ammonia arm 213, and spray ammonia structure Support member of the body 210 in 2 tower body of pyrolysis spray ammonia mixing section;Spray ammonia arm 213 is uniformly arranged in juxtaposition for multiple, thereon Spray ammonia hole or ammonia nozzle is provided with, for spraying ammonia.
As shown in Figure 7, Figure 8, the pyrolysis gas surge chamber 221 is used for for external heat source introducing pyrolysis gas arm 223 Buffering before;Flow-rate adjustment short tube 222 is used for connecting pyrolysis gas surge chamber 221 and pyrolysis gas arm 223, and controls heat The pressure of solution gas and flow;Pyrolysis gas arm 223 is square-section gradient tube, and its heavy in section one end is short with Flow-rate adjustment Pipe 222 connects;Pyrolysis gas arm 223 is provided with gas jetting hole, and multiple pyrolysis gas arms 223 are uniformly arranged in juxtaposition, point Do not connected with pyrolysis gas surge chamber 221 by corresponding Flow-rate adjustment short tube 222, on Flow-rate adjustment short tube 222, set flow tune Regulating device.Flow regulator can be screw rod or valve.
The ammonia surge chamber 211 is arranged along 213 orientation of spray ammonia arm, and by flange connections 212 and each 213 vertical connection of spray ammonia arm;Ammonia surge chamber 211 is 1~2, when ammonia surge chamber 211 is 2, is arranged in spray ammonia The both sides of arm 213;The pyrolysis gas surge chamber 221 is arranged along 223 orientation of pyrolysis gas arm, and is adjusted by flow Section short tube 222 and each 223 vertical connection of pyrolysis gas arm;Pyrolysis gas surge chamber 221 is 1~2, and pyrolysis gas are buffered When room 221 is 2, the both sides of pyrolysis gas arm 223 are arranged in.
As shown in Figure 9, Figure 10, the equal fluid layer of the orifice plate is by the equal fluid layer still 233 of orifice plate and 232 groups of the equal fluid layer moving plate of orifice plate Become;The equal fluid layer still 233 of orifice plate is disposed adjacent with the equal fluid layer moving plate 232 of orifice plate, the equal fluid layer still of orifice plate 233 and the equal fluid layer of orifice plate Multiple equal discharge orifices are opened up in correspondence position on moving plate 232, the equal fluid layer moving plate 232 of orifice plate can transversely and longitudinal short distance is slided, And its registration with corresponding equal discharge orifice on the equal fluid layer still 233 of orifice plate can be changed after sliding.
The equal fluid layer 231 of the foam metal is arranged on any side of the equal fluid layer of orifice plate, and which is set between the equal fluid layer of orifice plate There is interval, the equal fluid layer 2311 of foam metal is made up of foam metal, be flat board or folding slab structure;The equal fluid layer moving plate 232 of orifice plate And the percent opening of equal discharge orifice is 20~60% on the equal fluid layer still 233 of orifice plate, the equal fluid layer moving plate 232 of orifice plate or the equal fluid layer of orifice plate are quiet On piece 233, the percent opening of the equal discharge orifice of diverse location can be different, but the equal fluid layer moving plate 232 of orifice plate and the equal fluid layer still 233 of orifice plate The percent opening of the equal discharge orifice of upper correspondence position is identical;All discharge orifice be shaped as square, circular, oval or triangle, orifice plate all flows On layer moving plate 232 or the equal fluid layer still 233 of orifice plate, the equal discharge orifice shape of various location can be different, but corresponding position is equal Discharge orifice shape is identical.
301 points 2~4 layers setting of the denitrating catalyst, purifying smoke outlet 302 is located at tower body top.
1 bottom ash silo 101 of desulfurization dust clean-up stage sets closed unloading valve 102, and closed unloading valve 102 is located at ash silo 101 and goes out At material mouth.Ash silo 101 is used for collecting and storing the particulate matter that separates from flue gas, an effect of closed unloading valve 102 It is to prevent from extraneous air from penetrating into inside device by discharging opening to reduce flue-gas temperature, another effect is that discharge ash silo 101 is collected Dust granules thing.
Uniform baffle 105 can carry out crude separation to contained coarse granule coal dust in dust and gas, while leading to ash-laden gas Stream, makes the air flow method on 106 surface of filter bag uniform, it is to avoid dusty gas directly washes away 106 surface of filter bag, and impact filter bag 106 makes With efficiency and service life.Pulse spraying equipment 107 is located in 106 top Jing Qi region of filter bag, for carrying out arteries and veins to filter bag 106 Rush reverse gas cleaning.
Uniform deflector is obliquely installed, and is in 0~45° angle with vertical direction;Uniform deflector in uniform baffle 105 can To be one piece, it is also possible to combined by polylith and formed, during polylith combination, the angle of each piece of uniform deflector can be identical, it is also possible to no With, but it is noted that match with the planform of desulfurization dust clean-up stage 1.The shape of uniform deflector can be straight panel, also may be used To be arranged to bent plate.
Ammonia surge chamber 211 is cylinder or rectangular structure;In addition ammonia surge chamber 211 connects ammonia source of the gas end, uses In the temporary buffer of ammonia, its size is most important with pressure for ammonia flow with profile, is to realize malleation, negative pressure uniformly to spray The critical component of ammonia.When system is for malleation, ammonia source of the gas end pressure is big compared with 211 pressure of ammonia surge chamber, and ammonia is actively passed through Ammonia surge chamber, enters spray ammonia arm 213 by flange connections 212, is ejected by spraying ammonia hole or ammonia nozzle;Work as system During for negative pressure, the pressure of ammonia surge chamber 211 is big compared with ammonia source of the gas end pressure, and injection power is by spraying ammonia hole or ammonia nozzle is produced Raw, attract to pull ammonia and flow through ammonia surge chamber 211, flange connections 212 successively and enter to spray ammonia arm 213.Negative pressure operation and Streamline difference of the pressure ammonia in system during operation under positive pressure.
The pyrolysis gas surge chamber 221 is cylinder or rectangular structure;Pyrolysis gas surge chamber 221 is used for outside Thermal source introduces the advanced row buffering before of pyrolysis gas arm 223, prevents pyrolysis gas from causing system pressure to fluctuate when being directly entered, Avoid flow regulator frequent movement.After pyrolysis gas are sprayed from gas jetting hole, by the sky between pyrolysis gas arm 223 Gap is entered in tower body and carries out pyrolysis regeneration to denitrating catalyst 301, and its gas injection distributing homogeneity is good, denitrating catalyst 301 favorable regeneration effect.
The mixing current equalizing structure body 230 adopts the equal fluid layer 231 of foam metal, is advantageously implemented the internal a large amount of cigarettes of big bin All stream of gas;The equal fluid layer moving plate 232 of orifice plate is embedded in the two way slide lane of tower body, arranges screw mechanism, by spiral shell outside tower body The equal fluid layer moving plate 232 of lever attachment hole plate, is slided with realizing horizontal, longitudinal short distance.The equal fluid layer moving plate 232, orifice plate of orifice plate is equal Fluid layer still 233 coordinates, and by adjusting exhaust gas volumn of the registration regulation of equal discharge orifice by section, realizes many bins of big exhaust gas volumn Between air-flow all flow, pressure balance.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, Any those familiar with the art the invention discloses technical scope in, technology according to the present invention scheme and its Inventive concept equivalent or change in addition, should all be included within the scope of the present invention.

Claims (10)

1. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient, including being integrated in one from the bottom to top Desulfurization dust clean-up stage in individual tower body, pyrolysis spray ammonia mixing section and denitration reaction section, the desulfurization dust clean-up stage by ash silo, Smoke inlet, airflow uniform distribution flow-guiding structure body, filter bag and pulse spraying equipment composition;Pyrolysis spray ammonia mixing section is by spraying ammonia structure Body, pyrolysis gas conveying injection structure body and mixing current equalizing structure body composition;Denitration reaction section is by denitrating catalyst and smoke-purifying Gas outlet composition;Characterized in that, the desulfurization dust clean-up stage is arranged side by side for 2 groups, a pyrolysis spray ammonia mixing section is shared With denitration reaction section;The airflow uniform distribution flow-guiding structure body by the entrance guiding plate being arranged between smoke inlet and filter bag and The uniform baffle composition being arranged on below filter bag in ash silo;The spray ammonia structure by ammonia surge chamber, flange connections and Spray ammonia arm composition;The pyrolysis gas conveying injection structure body is by pyrolysis gas surge chamber, Flow-rate adjustment short tube and pyrolysis gas Body arm constitutes;The mixing current equalizing structure body is by the equal fluid layer of the orifice plate being arranged on perpendicular to airflow direction in tower body and foam gold Belong to equal fluid layer composition.
2. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 1, its It is characterised by, the wherein 1 group top that ammonia mixing section and denitration reaction section are arranged on 2 groups of desulfurization dust clean-up stage is sprayed in the pyrolysis, Other 1 group of desulfurization dust clean-up stage top is coupled logical;The L-shaped arrangement of overall structure.
3. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 1, its It is characterised by, the desulfurization dust clean-up stage includes the straight section tower body on top and the ash silo of bottom;2 groups of desulfurization dust clean-up stage Straight section tower body bottom sets smoke inlet respectively, and 2 smoke inlets are oppositely arranged.
4. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 1, its It is characterised by, in the straight section tower body of the desulfurization dust clean-up stage, filter bag is vertically embedding to be hung on card in the hole, uniform in multiple rows of, row, Filter bag top sets pulse spraying equipment;The entrance guiding plate is be arranged in parallel with filter bag, between entrance guiding plate and smoke inlet Gas channel upper/lower terminal be respectively communicated with straight section tower body and ash silo;Uniform baffle is made up of one to multiple piece of uniform deflector, Uniform deflector is obliquely installed, and which is 0~45 ° with the angle of vertical direction, and is inclined away from smoke inlet one end downwards;Enter Mouth deflector, uniform baffle are respectively along the straight section tower body of desulfurization dust clean-up stage or the elongated setting of the respective side of ash silo.
5. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 4, its It is characterised by, by multiple reinforcement link of boards between the uniform deflector and the bulkhead of ash silo, uniform deflector is straight panel Or bent plate;Uniform deflector for multiple when, be along inclined direction stepped arrangement, between each uniform deflector, uniform deflector It is connected by connecting plate between grey silo wall, forms the stereoeffect with enclosed, outer surface.
6. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 1, its It is characterised by, the ammonia surge chamber of the spray ammonia structure is used for the temporary buffer of ammonia, and realizes malleation, negative pressure spray ammonia;Method Blue connecting tube is used for connecting ammonia surge chamber and spray ammonia arm, and spray ammonia structure is in pyrolysis spray ammonia mixing section tower body Support member;Spray ammonia arm is uniformly arranged in juxtaposition for multiple, which is provided with spray ammonia hole or ammonia nozzle, for spraying ammonia.
7. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 1, its It is characterised by, the pyrolysis gas surge chamber is used for external heat source to be introduced the buffering before pyrolysis gas arm;Flow-rate adjustment Short tube is used for connecting pyrolysis gas surge chamber and pyrolysis gas arm, and controls pressure and the flow of pyrolysis gas;Pyrolysis gas Arm is square-section gradient tube, and its heavy in section one end is connected with Flow-rate adjustment short tube;Pyrolysis gas arm is provided with gas Spray-hole, multiple pyrolysis gas arms are uniformly arranged in juxtaposition, and are buffered with pyrolysis gas by corresponding Flow-rate adjustment short tube respectively Room connects, and sets flow regulator on Flow-rate adjustment short tube.
8. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated makeup in the compact high efficient according to claim 6 or 7 Put, it is characterised in that the ammonia surge chamber is arranged along the orientation of spray ammonia arm, and by flange connections and each spray ammonia Arm vertical connection;Ammonia surge chamber is 1~2, when ammonia surge chamber is 2, is arranged in the both sides of spray ammonia arm;Institute State pyrolysis gas surge chamber to arrange along the orientation of pyrolysis gas arm, and propped up with each pyrolysis gas by Flow-rate adjustment short tube Pipe vertical connection;Pyrolysis gas surge chamber is 1~2, when pyrolysis gas surge chamber is 2, is arranged in pyrolysis gas and props up The both sides of pipe.
9. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 1, its It is characterised by, the equal fluid layer of the orifice plate is made up of the equal fluid layer still of orifice plate and the equal fluid layer moving plate of orifice plate;The equal fluid layer still of orifice plate with The equal fluid layer moving plate of orifice plate is disposed adjacent, and opens up in correspondence position and multiple all flow on the equal fluid layer still of orifice plate and the equal fluid layer moving plate of orifice plate Hole, the equal fluid layer moving plate of orifice plate can transversely and longitudinal short distance is slided, and can change after sliding its with the equal fluid layer still of orifice plate on The registration of the equal discharge orifice of correspondence.
10. low-temperature flue gas desulfurization and dedusting, denitration and thermal decomposition integrated gasifying device in compact high efficient according to claim 1, Characterized in that, the equal fluid layer of the foam metal is arranged on any side of the equal fluid layer of orifice plate, which is set between the equal fluid layer of orifice plate There is interval, the equal fluid layer of foam metal is made up of foam metal, be flat board or folding slab structure;The equal fluid layer moving plate of orifice plate and orifice plate are equal On fluid layer still, the percent opening of equal discharge orifice is that 20~60%, on the equal fluid layer moving plate of orifice plate or the equal fluid layer still of orifice plate, diverse location is equal The percent opening of discharge orifice can be different, but on the equal fluid layer moving plate of orifice plate and the equal fluid layer still of orifice plate the equal discharge orifice of correspondence position percent opening Identical;All discharge orifice be shaped as square, circular, oval or triangle, on the equal fluid layer moving plate of orifice plate or the equal fluid layer still of orifice plate The equal discharge orifice shape of various location can be different, but the equal discharge orifice shape of corresponding position is identical.
CN201610908282.4A 2016-10-19 2016-10-19 Compact type high-efficiency medium-low-temperature flue gas desulfurization, dust removal, denitration and pyrolyzation integrated device Pending CN106422569A (en)

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Application publication date: 20170222