CN108295656A - A kind of efficient catalytic denitrification apparatus of phase-change temperature control - Google Patents
A kind of efficient catalytic denitrification apparatus of phase-change temperature control Download PDFInfo
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- CN108295656A CN108295656A CN201810195688.1A CN201810195688A CN108295656A CN 108295656 A CN108295656 A CN 108295656A CN 201810195688 A CN201810195688 A CN 201810195688A CN 108295656 A CN108295656 A CN 108295656A
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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
- B01D53/90—Injecting reactants
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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
- B01D53/8628—Processes characterised by a specific catalyst
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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
- B01D53/8631—Processes characterised by a specific device
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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
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/902—Multilayered catalyst
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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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Abstract
The present invention relates to a kind of efficient catalytic denitrification apparatus of phase-change temperature control, including catalytic denitration reactor, rectification unit is arranged in top, flow guiding unit is arranged in rectification unit top, if being arranged in parallel dried layer honeycomb catalyst bed layer in the catalytic denitration reactor of rectification unit lower part, ammonium hydroxide grid is arranged in the front end of gas approach, first kind solid-liquid phase change heat accumulating and the second class solid-liquid phase change heat accumulating are filled in the cavity of flow guiding unit and rectification unit respectively, enclose solid-solid phase change heat storing and heat preserving layer in the flue periphery of catalytic denitration reactor between ammonium hydroxide grid and catalyst bed.The present invention can effectively solve the problems such as smoke temperature fluctuation is big, catalytic efficiency is low in coal-burning power plant's Benitration reactor, and thermoregulation range is big, and temperature control effect is good, can improve the removal efficiency of nitrogen oxides.
Description
Technical field
The present invention relates to a kind of phase-change temperature control denitrification apparatus, and in particular to a kind of efficient catalytic denitration dress of phase-change temperature control
It sets.
Background technology
Selective catalytic reduction flue gas denitration technology becomes the mainstream technology of thermal power plant denitration device, power plant at this stage
Boiler variable load operation is frequent with peak load regulation network, and flue-gas temperature is led to problems such as larger fluctuation occur, can not ensure that denitration is urged
Agent participates in catalysis reaction in optimum activity temperature range so that catalytic efficiency, which significantly reduces, even to be inactivated.Simultaneously because warm
Degree, which reduces, also causes the solubility of ammonium salt to reduce and lump, and blocks honeycombed catalyst skeleton, so that flue gas circulating resistance is increased, subtracts
The contact area of few flue gas and catalyst, further reduced catalytic efficiency.Thermal power plant is mainly by widening catalyst at present
Reactivity window adjusts reactor week to adapt to caused temperature fluctuation during variable load operation, or by recirculated water
The way of temperature is enclosed, but this measure is mainly that recovery waste heat is used for improving feed temperature.Also have simultaneously and install economizer bypass additional, to carry
The flue-gas temperature of high SCR denitration system entrance, for improving the catalytic temperature under low load condition, but the problem is that part
Flue gas inevitably results in boiler efficiency without economizer and declines, and economizer bypass flue gas is mixed with main flue gas can also cause flue
Uneven with denitrification apparatus interior flow field, the pressure loss increases.In addition flow through flue-gas temperature in reactor it is relatively low when, catalyst
Activity reduces, reducing agent ammonia and the SO in flue gas3Reaction generates hydrogen sulfate ammonia and sulfate of ammoniac and can deposit on a catalyst, further
Catalyst activity is reduced, or even the irreversible activity of catalyst is caused to reduce.
Chinese patent CN203829919U proposes a kind of device for coal-fired plant boiler SCR Denitration in Boiler systems, though
The temperature of catalysis reaction can be so adjusted to a certain extent, but solid-liquid phase change material is invested honeycombed catalyst by this method
Around, the fusing of one side phase-change material and solidification need the time, which cannot fully discharge latent heat of phase change, lead to flue gas
Ideal catalytic temperature is not achieved in temperature, and catalytic efficiency is relatively low.Another aspect phase-change material will necessarily occupy the sky of flue gas circulation
Between so that the exhaust gas volumn flowed through is reduced, and is increased the flow resistance of flue gas, is most probably changed the working environment of follow up device.Furthermore
Small space around catalyst bed fills phase-change material, is insufficient for adjusting denitration when large-sized unit underrun
The big thermal capacitance demand of device internal temperature.
Invention content
The technical problem to be solved by the present invention is to the SCR denitration efficiency of thermal power plant's back-end ductwork is changed by boiler load
And temperature is caused the problem of larger fluctuation occur, it proposes a kind of using high temperature solid-solid phase change materials and high temperature solid-liquid phase change
The flue gas temperature control catalytic unit that material temperature classification is adjusted, can avoid catalyst inactivation and catalyst surface because depositing ammonium salt
And block, hence it is evident that improve catalytic efficiency, smoke temperature inside Benitration reactor is maintained to be in 300 DEG C or more.
The purpose of the present invention is achieved through the following technical solutions：
A kind of efficient catalytic denitrification apparatus of phase-change temperature control, including catalytic denitration reactor, the catalytic denitration reactor
Front end by gas approach connect economizer exit, the rear end of catalytic denitration reactor connects air preheat by exhaust pass
Rectification unit is arranged in the top of device import, catalytic denitration reactor, and flow guiding unit is arranged in the rectification unit top, is located at rectification
If being arranged in parallel dried layer honeycomb catalyst bed layer in the catalytic denitration reactor of unit lower part, the front end of the gas approach is set
Ammonium hydroxide grid is set, it is gentle that conveying storage of the setting for completing ammonia outside the gas approach of same position is in ammonium hydroxide grid
Change, ammonia storage and the processing unit of ammonia and air mixed diluting, is filled respectively in the cavity of the flow guiding unit and rectification unit
First kind solid-liquid phase change heat accumulating and the second class solid-liquid phase change heat accumulating, between the ammonium hydroxide grid and catalyst bed
The flue periphery of catalytic denitration reactor enclose solid-solid phase-change heat storing and heat preserving layer.
Further, the transition temperature range of the first kind solid-liquid phase change heat accumulating is 300-305 DEG C, described the
The transition temperature range of two class phase transformation materials is 305-310 DEG C.
Further, the phase transition temperature of the solid-solid phase-change heat storing and heat preserving layer is 290-320 DEG C.
Further, the ammonia storage and processing unit include liquid ammonia storage tank and static mixer.
Further, if the flow guiding unit includes dry plate diaphragm, the diaphragm parallel interval is mounted on solid
Determine on frame, the fixed frame is movably connected in by bolt in catalytic denitration reactor.
Further, the diaphragm is the arcuated alloy steel disc with thickness, is internally provided with the first hollow lumen simultaneously
First kind solid-liquid phase change heat accumulating is encapsulated in the first hollow lumen, first hollow lumen is externally provided with openable close
Capping.
Further, the rectification unit includes several pieces of Partition for realigning water flow, and the Partition for realigning water flow is evenly distributed on rectification list
In member, exhaust gases passes are formed between adjacent Partition for realigning water flow, the exhaust gases passes and catalyst bed are perpendicular.
Further, the Partition for realigning water flow is high thermal conductivity alloy steel, and outer wall is equipped with anti-abrasive coatings, it is hollow to be internally provided with second
Inner cavity, the second class solid-liquid phase change heat accumulating are encapsulated in the second hollow lumen, are equipped with outside second hollow lumen
Openable rectification orifice plate.
Beneficial effects of the present invention are：
(1) the hollow diaphragm of arc is made in streamlined steel alloy, and sufficient volume filling phase-change material is reserved in cavity
Ensure that high-temperature flue gas fully exchanges heat with phase-change heat-storage material, keeps the temperature inside reaction unit to be not less than 300 DEG C, do not destroy original
Some space structures and flue gas flow field, diaphragm and Partition for realigning water flow keep protecting with the lateral dimension of smoke movement vertical direction
It holds constant, increases the longitudinal size parallel with smoke movement to suitable position, do not influence the premise of the movement locus of original flue gas
Under, longitudinal volume for expanding cavity container makes a large amount of accumulation of heats of phase-change heat-storage material or the heat release in diaphragm cavity.
(2) it if the dry plate diaphragm of flow guiding unit is mounted at flue variable cross-section position, is movably connected on by bolt
It on the inner wall of Benitration reactor, is swung horizontal by certain angle, flow guiding unit can be adjusted according to different load and control entrance
A certain section flue gas flow rate is uniformly distributed, while ensureing that the angle of inclination of flow guiding unit adapts to the flow velocity of high-temperature flue gas and flying dust contains
Amount, reduces the flow resistance of flue gas.
(3) high temperature solid-liquid phase change material includes two kinds of phase-change materials of different phase transition temperatures, uses and divides in temperature adjustment region
Section accumulation of heat and exothermic mode, keep temperature adjustment process and range flexibly controllable.
(4) for flue heat storing and heat preserving layer between ammonium hydroxide grid and catalyst layer, it is suitable to be installed additional on the inside of foam heat-insulation layer
Solid-solid phase-change heat accumulating, transition temperature range is 290-320 DEG C, strengthens accumulation of heat and exothermic effects, so as to enhance storage
Emission capacity increases thermoregulation range.
Compared with prior art, the present invention can effectively solve smoke temperature in coal-burning power plant's Benitration reactor and fluctuate big, catalysis effect
The problems such as rate is low, thermoregulation range is big, and temperature control effect is good, can improve the removal efficiency of nitrogen oxides.
The present invention proposes that the installation flow guiding unit at flue variable cross-section, several diaphragms inside flow guiding unit make cigarette
Gas more gently transits in Benitration reactor, reduces abrasion and corrosion with wall surface and deflector, and diaphragm cavity is filled out
Fill phase transition of the first kind material.Arrange that rectification unit, several Partition for realigning water flow inside rectification unit make in catalyst layer upper level
The directional velocity of flue gas is parallel with wall surface of the container, and internal temperature field is more uniform, and Partition for realigning water flow cavity fills phase transition of the second kind material
Material.Flue outside wall surface installs solid-solid phase-change heat accumulating, enhancing storage thermal energy additional between ammonium hydroxide grid and catalyst bed
Power.When above-mentioned apparatus is by sweep of gases, make high temperature (or low temperature) flue gas that heat exchange occur with phase-change heat-storage material, completes great Rong
Accumulation of heat (or heat release) process of measuring may be implemented uniform decrease in temperature (or heating), be able to maintain that catalytic denitration inside reactor temperature exists
300 DEG C or more.
Phase-change material is positioned over diaphragm and Partition for realigning water flow internal cavities and flue periphery by the present invention, is compared
Phase-change material is placed in around catalyst layer, and the temperature adjustment time that the present invention designs is more sufficient, and internal temperature tends to be uniform substantially, catalysis
Efficiency significantly improves.
The present invention utilizes the longitudinal space of diaphragm and Partition for realigning water flow, horizontal space to remain unchanged, and compares phase transformation material
Material is distributed in around catalyst module, and the present invention can reduce the circulating resistance of flue gas, ensures sufficient catalyst distribution space,
The removal effect of nitrogen oxides is more preferably.
For the present invention using segmentation accumulation of heat and heat release design, it is in certain temperature that phase transition temperature is placed in deflector and cowling panel
The phase-change heat-storage material of gradient can ensure that device is adjusted in suitable temperature ranges, and catalytic denitration temperature of reactor is more
Uniformly.
In addition, in order to increase heat storage capacity, increase the temperature regulating range of Benitration reactor, in ammonia-gas spraying device and catalyst
The certain thickness high temperature solid-solid phase-change heat storing and heat preserving layer of flue outside wall surface close attachment between layer improves denitrification apparatus
To the thermal adaptability under the conditions of boiler different load.Since temperature is maintained at 300 DEG C or more, droplet-like ammonium salt is more difficult to be changed into
It is thick, it effectively reduces ammonium salt and carries flying dust and deposit, prevent catalyst layer surface from being covered by blocky or powdered ammonium salt, together
When can also alleviate air preheater to a certain extent, and there is a situation where block.
In general, the present invention can effectively solve that flue-gas temperature fluctuation is big, denitration catalyst efficiency is low, catalyst layer and sky
The problems such as air preheater easily blocking, and the boiler efficiency decline that bring, Flow and heat flux can be bypassed to avoid economizer not
, the problems such as flow resistance increases, catalytic denitration apparatus structure is novel, simple and reliable, safe and efficient, highly practical.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2-4 is the structural schematic diagram of flue gas flow guiding unit of the present invention；
Fig. 5-7 is the structural schematic diagram of flue gas rectification unit of the present invention；
In figure：Economizer exit 1, ammonium hydroxide grid 2, gas approach 3, solid-solid phase-change heat storing and heat preserving layer 4, flow guiding unit 5,
Diaphragm 5a, bolt 5b, fixed frame 5c, the first hollow lumen 501, sealing cover 502, rectification unit 6, Partition for realigning water flow 6a,
Two hollow lumens 601, rectification orifice plate 602, catalyst bed 7, exhaust pass 8, liquid ammonia storage tank 9, static mixer 10.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
A kind of efficient catalytic denitrification apparatus of phase-change temperature control, as shown in Figure 1, including catalytic denitration reactor, catalytic denitration
The front end of reactor connects economizer exit 1 by gas approach 3, and the rear end of catalytic denitration reactor is connected by exhaust pass 8
Air preheater import is connect, rectification unit 6 is arranged in the top of catalytic denitration reactor, and flow guiding unit is arranged in 6 top of rectification unit
5, if parallel arrangement dried layer honeycomb catalyst bed layer 7, gas approach in the catalytic denitration reactor of 6 lower part of rectification unit
3 front end setting ammonium hydroxide grid 2,3 outside of gas approach that same position is in ammonium hydroxide grid 2 are arranged for completing the defeated of ammonia
The storage of the ammonia of storage and gasification, ammonia and air mixed diluting and processing unit are sent, ammonia storage and processing unit include liquid ammonia storage tank 9
With static mixer 10, filled respectively in the cavity of flow guiding unit 5 and rectification unit 6 first kind solid-liquid phase change heat accumulating and
Second class solid-liquid phase change heat accumulating, the flue of the catalytic denitration reactor between ammonium hydroxide grid 2 and catalyst bed 7
Enclose solid-solid phase-change heat storing and heat preserving layer 4 in periphery.Wherein, the transition temperature range of first kind solid-liquid phase change heat accumulating is 300-
305 DEG C, the transition temperature range of phase transition of the second kind material is 305-310 DEG C, and Nitrates phase-change material, solid-solid phase can be used
Become the phase transition temperature of heat storing and heat preserving layer 4 as 290-320 DEG C.
Such as Fig. 2-4, if flow guiding unit 5 includes dry plate diaphragm 5a, diaphragm 5a parallel intervals are mounted on fixed frame
On 5c, fixed frame 5c is movably connected in by bolt 5b in catalytic denitration reactor, and denitration reaction is movably connected on by bolt
It on the inner wall of device, is swung horizontal by certain angle, flow guiding unit can be adjusted according to different load and control inlet flue gas flow velocity
It is uniformly distributed, while ensureing that the initial inclination angle of flow guiding unit and original position are almost the same, do not change original cigarette
The flow field of gas, the high-temperature flue gas and the phase-change heat-storage material in diaphragm cavity for flowing through flow guiding unit fully carry out hot friendship
It changes.Diaphragm 5a is the arcuated alloy steel disc with thickness, is internally provided with the first hollow lumen 501 and in the first hollow lumen
First kind solid-liquid phase change heat accumulating is encapsulated in 501, the first hollow lumen 501 is externally provided with openable sealing cover 502.
Such as Fig. 5-7, rectification unit 6 includes several pieces of Partition for realigning water flow 6a, and Partition for realigning water flow 6a is evenly distributed on rectification unit 6
It is interior, exhaust gases passes are formed between adjacent Partition for realigning water flow 6a, exhaust gases passes and catalyst bed 7 are perpendicular.Partition for realigning water flow 6a is height
Conducting alloy steel, outer wall are equipped with anti-abrasive coatings, reduce flying dust and wash away and wear to partition board.It is internally provided with the second hollow lumen 601,
Second class solid-liquid phase change heat accumulating is encapsulated in the second hollow lumen 601, and 601 outside of the second hollow lumen is equipped with and can open
Rectification orifice plate 602.
Gas approach 3 of the present invention and lead to air preheater exhaust pass 8 shape design with size arrange depend on
In the actual needs of site of deployment；The geomery and position of flow guiding unit 5 and rectification unit 6 are all in accordance with Optimized Simulated meter
It is designed, primarily to adjusting flue gas flow field reaches uniform, reduces the pressure loss；First kind solid-liquid phase change heat accumulation material
The phase transition temperature of material, the second class solid-liquid phase change heat accumulating and the high temperature solid-solid phase transition material of pipeline accumulation of heat is all in accordance with catalyst
Depending on the optimum efficiency for deviating from nitrogen oxides, and the frequency of the quantity of the filling of phase-change material and replacement and supplement also depends on
Practical operation situation；Diaphragm inner cavity regards different Power Plant peak regulation degree from the volume of Partition for realigning water flow inner cavity and number is each
It is different.
Concrete operating principle is：In catalytic denitration reactor, nitrogen oxides under the action of catalyst, and is in a constant temperature
By NH when degree condition3Equal reducing agents are reduced to the nitrogen and water of environmental protection, do not generate secondary pollution substantially.NH3It is mixed through static state with air
It after clutch processing, is sprayed into flue through ammonia-gas spraying device, ammonium hydroxide grid will enter after the mixing ammonium hydroxide of entrance and flue gas atomization uniformly
In catalytic denitration reactor, flow guiding unit is flowed through on reactor top, high-temperature flue gas is pre- into trip temperature with heat storing and heat preserving layer first
It adjusts, then tilts and wash away diaphragm, while flue gas is sent out with the first kind solid-liquid phase change heat accumulating in diaphragm cavity
Heat exchanges, to change flow direction and the temperature of flue gas.High-temperature flue gas enters rectification unit later, occurs with Partition for realigning water flow
Interaction, and heat exchange is carried out with the second class solid-liquid phase change heat accumulating in Partition for realigning water flow cavity, so that flue gas is uniformly flowed to
Catalyst bed, and flue gas is adjusted to suitable catalytic reaction temperature.Nitrogen oxides in last flue gas is with nitrogen in catalyst
Effect issues biochemical reaction, to remove nitrogen oxides, stablizes temperature of reactor, reduction droplet-like ammonium salt is changed into thick
Shape, the more difficult carrying flying dust of ammonium salt, catalyst bed surface deposits are reduced, while can also be reduced air preheater and be blocked
Frequency.
When high-temperature flue gas is flowed out from economizer exit, the ammonium hydroxide through ammonia-gas spraying device mixing is with flue gas under the effect of ammonium hydroxide grid
Uniformly mixing, then flows through and is attached with certain thickness solid-solid phase-change heat storing and heat preserving layer 4, first flue gas and heat storing and heat preserving layer into
Trip temperature preconditions, under the effect of adjustable flow guiding unit, flue gas smooth transition to diaphragm entrance, by being produced with diaphragm
Raw spurt effect, and heat exchange occurs again with the first kind solid-liquid phase change heat accumulating of diaphragm inner cavity, to realize cigarette
The function of gas deflecting and temperature adjustment.Flue gas enters rectification unit later, by interacting with Partition for realigning water flow, and with rectification every
Heat exchange occurs again for the second class solid-liquid phase change heat accumulating of plate inner cavity, to realize that flue gas flow is uniformly distributed and again
The function of temperature adjustment.It finally will uniformly mix to the nitrogen oxides in the flue gas of suitable temperature and occur under the action of catalyst with nitrogen
Chemical reaction, to remove nitrogen oxides.
When the high-temperature flue-gas of economizer exit is more than 320 DEG C, solid-solid phase-change heat storing and heat preserving layer 4 completes first
The accumulation of heat in one stage, make the flue-gas temperature into flow guiding unit be in 320 DEG C hereinafter, then will flow through the flue gas of flow guiding unit with
First kind solid-liquid phase change heat accumulating is exchanged heat and heat accumulation, and again by flue gas cool-down to 310 DEG C or so, flue gas flows through later
When rectification unit, heat exchange occurs again for the phase-change material of Partition for realigning water flow inner cavity and flue gas and heat accumulation, finally makes flue-gas temperature steady
It is scheduled near 300 DEG C, catalyst inactivation can be prevented, improve catalytic efficiency.
When economizer exit flue-gas temperature is less than 290 DEG C, solid-solid phase-change heat storing and heat preserving layer 4 completes the first stage first
Heat release, so that the flue-gas temperature into flow guiding unit is improved to 290 DEG C, then will flow through the flue gas and first of flow guiding unit
Class solid-liquid phase change heat accumulating is exchanged heat and heat release, and flue gas is gradually adjusted to higher temperature, and flue gas flows through rectification list later
When first, heat exchange occurs again for the phase-change material of Partition for realigning water flow inner cavity and flue gas and heat release, and flue-gas temperature is finally made to stablize 300
Near DEG C, achieve the purpose that efficient catalytic denitration.
Claims (8)
1. a kind of efficient catalytic denitrification apparatus of phase-change temperature control, including catalytic denitration reactor, the catalytic denitration reactor
Front end connects economizer exit (1) by gas approach (3), and the rear end of catalytic denitration reactor is connected by exhaust pass (8)
Air preheater import, the top setting rectification unit (6) of catalytic denitration reactor, rectification unit (6) the top setting are led
Unit (5) is flowed, is located at rectification unit (6) if being arranged in parallel dried layer honeycomb catalyst bed layer in the catalytic denitration reactor of lower part
(7), the front end setting ammonium hydroxide grid (2) of the gas approach (3), the gas approach of same position is in ammonium hydroxide grid (2)
(3) the ammonia storage of conveying storage and gasification, ammonia and air mixed diluting of the external setting for completing ammonia and processing unit,
It is characterized in that, the storage of first kind solid-liquid phase change is filled in the cavity of the flow guiding unit (5) and rectification unit (6) respectively
Hot material and the second class solid-liquid phase change heat accumulating, the catalytic denitration between the ammonium hydroxide grid (2) and catalyst bed (7)
Enclose solid-solid phase-change heat storing and heat preserving layer (4) in the flue periphery of reactor.
2. a kind of efficient catalytic denitrification apparatus of phase-change temperature control according to claim 1, which is characterized in that the first kind
The transition temperature range of solid-liquid phase change heat accumulating is 300-305 DEG C, and the transition temperature range of the phase transition of the second kind material is
305-310℃。
3. a kind of efficient catalytic denitrification apparatus of phase-change temperature control according to claim 1, which is characterized in that the solid-solid
The phase transition temperature of phase-change thermal-storage layer (4) is 290-320 DEG C.
4. a kind of efficient catalytic denitrification apparatus of phase-change temperature control according to claim 1, which is characterized in that the ammonia storage
Include liquid ammonia storage tank (9) and static mixer (10) with processing unit.
5. a kind of efficient catalytic denitrification apparatus of phase-change temperature control according to claim 1, which is characterized in that the water conservancy diversion list
First (5) if including dry plate diaphragm (5a), diaphragm (5a) parallel interval is mounted on fixed frame (5c), described solid
Determine frame (5c) to be movably connected in catalytic denitration reactor by bolt (5b).
6. a kind of efficient catalytic denitrification apparatus of phase-change temperature control according to claim 5, which is characterized in that the water conservancy diversion every
Plate (5a) is the arcuated alloy steel disc with thickness, is internally provided with the first hollow lumen (501) and in the first hollow lumen (501)
Middle encapsulation first kind solid-liquid phase change heat accumulating, first hollow lumen (501) are externally provided with openable sealing cover (502).
7. a kind of efficient catalytic denitrification apparatus of phase-change temperature control according to claim 1, which is characterized in that the rectification list
First (6) include several pieces of Partition for realigning water flow (6a), and the Partition for realigning water flow (6a) is evenly distributed in rectification unit (6), adjacent rectification
Exhaust gases passes are formed between partition board (6a), the exhaust gases passes and catalyst bed (7) are perpendicular.
8. a kind of efficient catalytic denitrification apparatus of phase-change temperature control according to claim 7, which is characterized in that the rectification every
Plate (6a) is high thermal conductivity alloy steel, and outer wall is equipped with anti-abrasive coatings, is internally provided with the second hollow lumen (601), second class is solid-
Liquid phase change heat storage material is encapsulated in the second hollow lumen (601), is equipped with outside second hollow lumen (601) openable
Rectification orifice plate (602).
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| CN201810195688.1A CN108295656B (en) | 2018-03-09 | 2018-03-09 | Phase-change temperature-control efficient catalytic denitration device |
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| CN201810195688.1A CN108295656B (en) | 2018-03-09 | 2018-03-09 | Phase-change temperature-control efficient catalytic denitration device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109140476A (en) * | 2018-09-13 | 2019-01-04 | 大唐淮北发电厂 | A kind of thermal power plant's denitration flue deflector |
| CN109899123A (en) * | 2019-03-18 | 2019-06-18 | 上海电力学院 | A kind of gas turbine afterheat increasing efficiency device of phase-change temperature control |
| CN110898663A (en) * | 2019-11-28 | 2020-03-24 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Flue gas temperature homogenizing device and method |
| CN114570202A (en) * | 2020-11-30 | 2022-06-03 | 河北林格环保科技有限公司 | Flue gas denitration system and flue gas denitration method |
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