CN102743889A - Liquid ammonia evaporator and liquid ammonia evaporation system for flue gas denitration - Google Patents
Liquid ammonia evaporator and liquid ammonia evaporation system for flue gas denitration Download PDFInfo
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- CN102743889A CN102743889A CN2012102493292A CN201210249329A CN102743889A CN 102743889 A CN102743889 A CN 102743889A CN 2012102493292 A CN2012102493292 A CN 2012102493292A CN 201210249329 A CN201210249329 A CN 201210249329A CN 102743889 A CN102743889 A CN 102743889A
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Abstract
The invention discloses a liquid ammonia evaporator and a liquid ammonia evaporation system for flue gas denitration, wherein the liquid ammonia evaporator comprises a heat exchange chamber and a stainless steel heat exchange pipe which is arranged in the heat exchange chamber; the heat exchange chamber consists of a lower heat exchange chamber and an upper heat exchange chamber; a denitrated flue gas inlet is arranged at the top of the lower heat exchange chamber and a denitrated flue gas outlet is arranged at the bottom of the lower heat exchange chamber; a hot air inlet is arranged at the bottom of the upper heat exchange chamber and a hot air outlet is arranged at the top of the upper heat exchange chamber; the stainless steel heat exchange pipe comprises a primary heat exchange pipe which is arranged in the lower heat exchange chamber and a secondary evaporator heat exchange pipe which is arranged in the upper heat exchange chamber; the pipe wall of the secondary evaporator heat exchange pipe consists of an inner wall and an outer wall; evenly distributed millimeter-level small holes are arranged on the inner wall; and evenly distributed micron-level micro holes are arranged on the outer wall, according to the liquid ammonia evaporator, the heat exchange efficiency of liquid ammonia is greatly improved and an ammonia evaporation supply system is simplified; and the liquid ammonia evaporation system has a compact structure and is capable of fully utilizing the waste heat of flue gas and the heat of preheated air.
Description
Technical field
The present invention relates to a kind of liquefied ammonia evaporimeter and ammonia evaporation supply system that is applied in the denitrating flue gas field.
Background technology
SCR (selective catalytic reduction) denitrating technique is the main denitrating technique of present coal-burning power plant; Its principle is under the effect of uniform temperature and catalyst, and reducing agent selectively is reduced to free of contamination N2 and water to the NOx in the flue gas.The reducing agent of commercial Application mainly is an ammonia at present; Next is a urea, wherein adopts ammonia need use ammonia evaporation supply system as reducing agent, promptly earlier liquefied ammonia is evaporated to ammonia; Then through the ammonia surge tank; And then mix in blender with air (utilize dilution blower fan carry), and then get into ammonia-spraying grid, get into catalytic reactor at last again and react.
Traditional ammonia evaporation supply system comprises equipment such as liquefied ammonia evaporimeter, ammonia surge tank, ammonia dilution trap, dilution blower fan; And the evaporation supply system of ammonia adopts Steam Heating or coil pipe water-bath heating more; No matter adopt steam or water-bath heating in addition; Be equipped with the dump pipeline, unnecessary ammonia will finally drain into waste plant and handle by the dump discharge of pipes to absorbing the pond.Traditional ammonia evaporation supply system flow process is complicated, and heat exchange efficiency is low, and needs extra steam or heat, so need to improve.
Summary of the invention
The purpose of this invention is to provide a kind of technology is simple, heat exchange efficiency is high liquefied ammonia evaporimeter that is used for denitrating flue gas and liquefied ammonia vapo(u)rization system, solve traditional ammonia evaporation supply system complex structure, heat exchange efficiency is low and need the extra steam or the technical problem of heat.
For realizing above-mentioned purpose; The present invention adopts following technical scheme: a kind of liquefied ammonia evaporimeter that is used for denitrating flue gas comprises Heat Room and is located at the stainless steel heat exchanger tube in the Heat Room that it is characterized in that: said Heat Room is made up of bottom Heat Room and top Heat Room; The top of bottom Heat Room has the denitration gas approach; The bottom of bottom Heat Room has the denitration exhanst gas outlet, and the bottom of top Heat Room has hot-air inlets, and the top of top Heat Room has hot air outlet.
Said stainless steel heat exchanger tube comprises a heat exchanger tube that is located in the Heat Room of bottom and is located at the revaporizer heat exchanger tube in the Heat Room of top; And No. one time heat exchanger tube is communicated with the revaporizer heat exchanger tube; The tube wall of said revaporizer heat exchanger tube is made up of inner and outer wall; Wherein inwall is provided with equally distributed millimetre-sized aperture, and outer wall is provided with equally distributed micron-sized micropore.
The entrance point of a said heat exchanger tube is communicated with the lower straighttube of the level that is positioned at Heat Room bottom, bottom; Have the liquefied ammonia import that is communicated with usefulness with the liquefied ammonia feed-line on the lower straighttube; The entrance point of said revaporizer heat exchanger tube is communicated with the last straight tube of the level that is positioned at Heat Room bottom, top; Last straight tube is communicated with the port of export of a heat exchanger tube again, and the port of export of revaporizer heat exchanger tube gathers pipe with the revaporizer of the level that is positioned at Heat Room top, top and is communicated with.
The caliber of said lower straighttube can be 4～5 times of caliber of liquefied ammonia feed-line, and the caliber of last straight tube can be 6～8 times of caliber of liquefied ammonia feed-line.
A said heat exchanger tube can be snakelike fin-tube type heat exchanger tube.
The caliber of said fin-tube type heat exchanger tube can be 15mm～25mm, and the fin height of fin-tube type heat exchanger tube can be 50%～60% of caliber, and the spacing of fin can be 2.5mm～3.5mm, and the spacing between the fin-tube type heat exchanger tube can be 30mm～50mm.
The interface of said fin-tube type heat exchanger tube and lower straighttube is horizontal interface or vertical joint, and the center line of all fin-tube type heat exchanger tubes and the interface of lower straighttube is on same horizontal plane.
Said revaporizer heat exchanger tube can be the vertical tube that many parallel interval are provided with.
The thickness of the inwall in the said vertical tube can be 10 mm～15mm, and the aperture of the aperture on the inwall can be 1mm～3mm, and the aperture of the micropore on the outer wall can be 5um～10um.
The percent opening of said outer wall can be 1%～5%.
A kind of liquefied ammonia vapo(u)rization system that is used for denitrating flue gas; Include liquid ammonia storage tank, liquefied ammonia evaporimeter and ammonia-spraying grid; Wherein the liquefied ammonia evaporimeter comprises Heat Room and the stainless steel heat exchanger tube that is located in the Heat Room; Liquid ammonia storage tank is communicated with stainless steel heat exchanger tube in the liquefied ammonia evaporimeter through the liquefied ammonia feed-line; In the exhaust gases passes of ammonia-spraying grid between boiler and catalytic reactor; It is characterized in that: said liquefied ammonia evaporimeter is the above-mentioned liquefied ammonia evaporimeter that is used for denitrating flue gas, and the denitration gas approach on the liquefied ammonia evaporimeter advances boiler channel and catalytic reactor through flue gas and is communicated with exhaust gases passes between the air preheater, and the denitration exhanst gas outlet on the liquefied ammonia evaporimeter goes out boiler channel and air preheater through flue gas and is communicated with exhaust gases passes between the exhanst gas outlet; Hot-air inlets on the liquefied ammonia evaporimeter is communicated with air duct between the boiler through air branch road and air preheater, and the hot air outlet on the liquefied ammonia evaporimeter passes through mixed gas passage and is communicated with ammonia-spraying grid.
Compared with prior art the present invention has following characteristics and beneficial effect: the liquefied ammonia evaporimeter among the present invention has adopted integrated design; Traditional liquefied ammonia evaporimeter is combined with the diffusion release; The fin-tube type gas-liquid heat exchange is combined with direct heat transfer; So improved the heat exchange efficiency of liquefied ammonia greatly, simplified ammonia evaporation supply system.
Liquefied ammonia vapo(u)rization system employing discharged gas fume among the present invention and the air after the preheating have reduced the consumption of steam or other energy as thermal source and carrier gas.Simultaneously the liquefied ammonia vapo(u)rization system utilized flue gas and preheating the pressure differential of air, do not need external motive device, easy maintenance.
Liquefied ammonia vapo(u)rization system compact conformation among the present invention; Heat exchange efficiency is high, can make full use of the heat of fume afterheat and preheated air, and the heat exchange of liquefied ammonia, the mixing of ammonia are all accomplished in the liquefied ammonia evaporimeter; So do not have ammonia emission, the atmosphere pollution of having avoided ammonia leakage to cause.
The present invention utilizes the main thermal source of high-temperature flue gas as the liquefied ammonia evaporation; 100%～120% of institute's calorific requirement is provided; Utilize supplemental heat source and the carrier gas of the preheated air of process air preheater as the liquefied ammonia evaporation; The ammonia-spraying grid that directly gets into catalytic unit through the ammonia of dilution reacts, and is applicable in SCR (SCR) flue-gas denitration process evaporation, release and mixing as the liquefied ammonia of reducing agent.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Fig. 1 is the structural representation that is used for the liquefied ammonia vapo(u)rization system of denitrating flue gas.
Fig. 2 is the structural representation that is used for the liquefied ammonia evaporimeter of denitrating flue gas.
Fig. 3 is the enlarged diagram at I place among Fig. 2.
Fig. 4 is the enlarged diagram at II place among Fig. 3.
Fig. 5 is the sketch map of A-A section among Fig. 2.
Fig. 6 is the sketch map of B-B section among Fig. 2.
Fig. 7 is the sketch map of C-C section among Fig. 2.
Reference numeral: 1-bottom Heat Room; 2-top Heat Room; 3-denitration gas approach; 4-denitration exhanst gas outlet; The 5-hot-air inlets; The 6-hot air outlet; Heat exchanger tube of 7-; The 8-lower straighttube; The import of 9-liquefied ammonia; The last straight tube of 10-; 11-revaporizer heat exchanger tube; The 12-inwall; The 13-outer wall; The 14-aperture; The 15-micropore; The 16-revaporizer gathers pipe; The 17-boiler; The 18-economizer; Exhaust gases passes between 19-boiler and the catalytic reactor; The 20-catalytic reactor; The 21-flue gas advances boiler channel; The 22-flue gas goes out boiler channel; Air duct between 23-air intlet and the air preheater; The 24-air preheater; 25-air branch road; The 26-mixed gas passage; The 27-ammonia-spraying grid; The 28-liquid ammonia storage tank; Exhaust gases passes between 29-catalytic reactor and the air preheater; Exhaust gases passes between 30-air preheater and the exhanst gas outlet; Air duct between 31-air preheater and the boiler; 32-liquefied ammonia feed-line.
The specific embodiment
Embodiment is referring to shown in Fig. 2-7; This liquefied ammonia evaporimeter that is used for denitrating flue gas comprises Heat Room and is located at the stainless steel heat exchanger tube in the Heat Room that said Heat Room is made up of bottom Heat Room 1 and top Heat Room 2; The top of bottom Heat Room 1 has denitration gas approach 3; The bottom of bottom Heat Room 1 has denitration exhanst gas outlet 4, and the bottom of top Heat Room 2 has hot-air inlets 5, and the top of top Heat Room 2 has hot air outlet 6.
Said stainless steel heat exchanger tube comprises a heat exchanger tube 7 that is located in the bottom Heat Room 1 and is located at the revaporizer heat exchanger tube 11 in the top Heat Room 2; And No. one time heat exchanger tube 7 is communicated with revaporizer heat exchanger tube 11; The tube wall of said revaporizer heat exchanger tube 11 is made up of inwall 12 and outer wall 13; Wherein inwall 12 is provided with equally distributed millimetre-sized aperture 14, and outer wall 13 is provided with equally distributed micron-sized micropore 15.
In the present embodiment; The entrance point of a heat exchanger tube 7 (is low head again with the lower straighttube 8 that is positioned at the level of bottom Heat Room 1 bottom; For straight length is formed) be communicated with; Have on the lower straighttube 8 be communicated with usefulness with liquefied ammonia feed-line 32 liquefied ammonia import 9 (according to the flow of liquefied ammonia; One or several liquefied ammonia import can be arranged, and the position of opening of liquefied ammonia import is generally lower straighttube maximum secting area place), the entrance point of revaporizer heat exchanger tube 11 is communicated with the last straight tube 10 (calling end socket again) of the level that is positioned at top Heat Room 2 bottoms; Last straight tube 10 is communicated with the port of export of a heat exchanger tube 7 again, and the port of export of revaporizer heat exchanger tube 11 gathers pipe 16 with the revaporizer of the level that is positioned at top Heat Room 2 tops and is communicated with.Referring to Fig. 1, in the present embodiment, the caliber of lower straighttube 8 is 4～5 times of caliber of liquefied ammonia feed-line 32, and the caliber of last straight tube 10 is liquefied ammonia carrier pipes, 6～8 times of 32 caliber.
In the present embodiment, a heat exchanger tube 7 is the snakelike fin-tube type heat exchanger tube that many parallel interval are provided with.The caliber of fin-tube type heat exchanger tube is 15mm～25mm, and the fin height of fin-tube type heat exchanger tube is 50%～60% of a caliber, and the spacing of fin is 2.5mm～3.5mm, and the spacing between the fin-tube type heat exchanger tube is 30mm～50mm.The interface of fin-tube type heat exchanger tube and lower straighttube 8 is horizontal interface or vertical joint, and the center line of all fin-tube type heat exchanger tubes and the interface of lower straighttube 8 is on same horizontal plane.The fin-tube type heat exchanger tube is made up of fin and heat exchanger tube, and the quantity of fin-tube type heat exchanger tube can be confirmed according to the liquefied ammonia evaporation capacity.
The length of said revaporizer heat exchanger tube and shape can be according to the disposal ability of evaporimeter and the spatial design of flue.Last straight tube level when operation is installed, and the outlet of revaporizer heat exchanger tube is in the bottom of last straight tube, and the import of revaporizer heat exchanger tube is uniformly distributed with at the upper semi-circle column section of lower straighttube.In the present embodiment, revaporizer heat exchanger tube 11 includes the vertical tube that many parallel interval are provided with.The thickness of the inwall 12 in the vertical tube is 10 mm～15mm, and the aperture of the aperture 14 on the inwall 12 is 1mm～3mm, and the aperture of the micropore 15 on the outer wall 13 is 5um～10um.The percent opening of outer wall 13 is 1%～5%.The outer wall 13 of revaporizer heat exchanger tube is made up of the stainless steel sintered filter core, and homodisperse micropore can make ammonia evenly discharge, and bigger metal surface also provides bigger heat exchange area for the liquefied ammonia that does not evaporate fully.The inwall of revaporizer heat exchanger tube is made up of 304 stainless steel perforates.
Whole flue-gas denitration process can be provided with economizer 18 in the boiler 17 among Fig. 1 referring to Fig. 1.The exhaust gases passes of boiler tail by catalytic reactor 20 and air preheater 24 minutes for 30 3 sections of the exhaust gases passes between the exhaust gases passes between the exhaust gases passes between boiler and the catalytic reactor 19, catalytic reactor and the air preheater 29 and air preheater and the exhanst gas outlet.The air duct that is communicated with boiler 17 by air preheater 24 minutes for 31 two sections of the air ducts between the air duct between air intlet and the air preheater 23 and air preheater and the boiler.Anticorrosion with traditional flue anti-corrosion measure of exhaust gases passes is identical.
Referring to Fig. 1, Fig. 2; The described liquefied ammonia vapo(u)rization system that is used for denitrating flue gas; Include liquid ammonia storage tank 28, liquefied ammonia evaporimeter and ammonia-spraying grid 27; Wherein liquid ammonia storage tank 2 is communicated with stainless steel heat exchanger tube in the liquefied ammonia evaporimeter through liquefied ammonia feed-line 32, in the exhaust gases passes 19 of ammonia-spraying grid 27 between boiler and catalytic reactor.Denitration gas approach 3 on the liquefied ammonia evaporimeter advances boiler channel 21 and catalytic reactor through flue gas and is communicated with exhaust gases passes 29 between the air preheater; Denitration exhanst gas outlet 4 on the liquefied ammonia evaporimeter goes out boiler channel 22 and air preheater through flue gas and is communicated with exhaust gases passes 30 between the exhanst gas outlet; Hot-air inlets 5 on the liquefied ammonia evaporimeter is communicated with air duct 31 between the boiler through air branch road 25 and air preheater, and the hot air outlet 6 on the liquefied ammonia evaporimeter passes through mixed gas passage 26 and is communicated with ammonia-spraying grid 27.
Referring to Fig. 1, Fig. 2; In the present embodiment; Bottom Heat Room 1 is the exhaust gases passes amplifying sections in the exhaust gases passes, and top Heat Room 2 is the air duct amplifying sections in the air duct, and exhaust gases passes amplifying sections and air duct amplifying sections separate at the upper cover place of fin-tube type heat exchanger.
Technological process main among the present invention comprises: 1, the flue gas after the denitration gets into exhaust gases passes then and carries out follow-up desulfurization and dedusting processing through fin-tube type heat exchanger tube and liquefied ammonia heat exchange.
2, air is through most of boiler that gets into behind the air preheater, and fraction is introduced top Heat Room 2 in the liquefied ammonia evaporimeter, heating and gasifying and dilution are carried out in evaporation and the ammonia, the liquefied ammonia that ooze out.
3, liquefied ammonia at first is evaporated to ammonia through the fin-tube type heat exchanger tube by major part; Ammonia gets into the revaporizer heat exchanger tube with the liquefied ammonia of carrying secretly; See through micropore under pressure and be diffused into the top Heat Room; Carry out mixed diluting with hot-air (air that gets into from hot-air inlets, heated by air preheater) then and become mist; Unevaporated liquefied ammonia forms fine droplet on the surface of revaporizer heat exchanger tube (unevaporated liquefied ammonia appears micropore surface), under hot air acting, be evaporated into ammonia and get into mist.The mist of above air and ammonia is used for denitrating flue gas through ammonia-spraying grid 27 (ammonia nozzle); That is to say; Ammonia in the revaporizer heat exchanger tube and air fully mix with heat exchange after become mist and get into ammonia-spraying grid, get into selectivity recall reduction reaction district through ammonia-spraying grid again then and carry out the selective reduction denitration reaction.
In whole technical process, the flow of liquefied ammonia is the major control object, and according to the concentration of nitrogen oxide in the flue gas, the flow that flow is confirmed liquefied ammonia, the flow of high-temperature flue gas is that excessive assurance liquefied ammonia evaporation institute calorific requirement get final product in the evaporimeter, does not need strict control.The flow of hot-air is about 20 times of the required ammonia flow of denitration, and the concentration of ammonia in the gaseous mixture is controlled at about 5%.The ammonia that does not spread out fully enters air ammonia mixing air channel by the road to be mixed with gaseous mixture.
In heat transfer process; Described fin-tube type heat exchanger adopts the flue gas of high heating value to carry out heat exchange, that is to say fin-tube type heat exchanger tube and flue gas cross-flow heat exchange; Liquefied ammonia utilizes 300 ℃～400 ℃ flue gas to carry out evaporating after the heat exchange, and the heat of flue gas is 80%～100% of a liquefied ammonia evaporation institute calorific requirement.Said revaporizer heat exchanger tube adopts the air after the preheating to carry out heat exchange; That is to say; The ammonia that from fin-tube type heat exchanger, is evaporated discharges and heat exchange at the revaporizer heat exchanger tube with a small amount of liquefied ammonia; The revaporizer heat exchanger tube adopts through 90 ℃～100 ℃ preheated air after the air preheater heat exchange and carries out heat exchange and evaporation, and in the Heat Room of top, ammonia mixes with preheated air; Not fully the liquefied ammonia of evaporation in micropore and all can absorb heat on revaporizer heat exchanger tube surface and evaporate; The heat of preheated air is 10%～30% of a liquefied ammonia evaporation institute calorific requirement, can guarantee that the ammonia that has gasified can not liquefy in pipeline once more, and the flow of preheated air is 10～20 times of ammonia amount.
Claims (10)
1. liquefied ammonia evaporimeter that is used for denitrating flue gas; Comprise Heat Room and be located at the stainless steel heat exchanger tube in the Heat Room; It is characterized in that: said Heat Room is made up of bottom Heat Room (1) and top Heat Room (2); The top of bottom Heat Room (1) has denitration gas approach (3); The bottom of bottom Heat Room (1) has denitration exhanst gas outlet (4), and the bottom of top Heat Room (2) has hot-air inlets (5), and the top of top Heat Room (2) has hot air outlet (6);
Said stainless steel heat exchanger tube comprises a heat exchanger tube (7) that is located in the bottom Heat Room (1) and is located at the revaporizer heat exchanger tube (11) in the top Heat Room (2); And a heat exchanger tube (7) is communicated with revaporizer heat exchanger tube (11); The tube wall of said revaporizer heat exchanger tube (11) is made up of inwall (12) and outer wall (13); Wherein inwall (12) is provided with equally distributed millimetre-sized aperture (14), and outer wall (13) is provided with equally distributed micron-sized micropore (15).
2. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 1; It is characterized in that: the entrance point of a said heat exchanger tube (7) is communicated with the lower straighttube (8) of the level that is positioned at bottom Heat Room (1) bottom; Have the liquefied ammonia import (9) that is communicated with usefulness with liquefied ammonia feed-line (32) on the lower straighttube (8); The entrance point of said revaporizer heat exchanger tube (11) is communicated with the last straight tube (10) of the level that is positioned at top Heat Room (2) bottom; Last straight tube (10) is communicated with the port of export of a heat exchanger tube (7) again, and the port of export of revaporizer heat exchanger tube (11) gathers pipe (16) with the revaporizer of the level that is positioned at top Heat Room (2) top and is communicated with.
3. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 2; It is characterized in that: the caliber of said lower straighttube (8) is 4～5 times of caliber of liquefied ammonia feed-line (32), and the caliber of last straight tube (10) is 6～8 times of caliber of liquefied ammonia feed-line (32).
4. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 2 is characterized in that: a said heat exchanger tube (7) is snakelike fin-tube type heat exchanger tube.
5. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 4; It is characterized in that: the caliber of said fin-tube type heat exchanger tube is 15mm～25mm; The fin height of fin-tube type heat exchanger tube is 50%～60% of a caliber; The spacing of fin is 2.5mm～3.5mm, and the spacing between the fin-tube type heat exchanger tube is 30mm～50mm.
6. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 4; It is characterized in that: the interface of said fin-tube type heat exchanger tube and lower straighttube (8) is horizontal interface or vertical joint, and the center line of the interface of all fin-tube type heat exchanger tubes and lower straighttube (8) is on same horizontal plane.
7. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 2 is characterized in that: the vertical tube that said revaporizer heat exchanger tube (11) is provided with for many parallel interval.
8. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 7; It is characterized in that: the thickness of the inwall in the said vertical tube (12) is 10 mm～15mm; The aperture of the aperture (14) on the inwall (12) is 1mm～3mm, and the aperture of the micropore (15) on the outer wall (13) is 5um～10um.
9. the liquefied ammonia evaporimeter that is used for denitrating flue gas according to claim 7 is characterized in that: the percent opening of said outer wall (13) is 1%～5%.
10. liquefied ammonia vapo(u)rization system that is used for denitrating flue gas; Include liquid ammonia storage tank (28), liquefied ammonia evaporimeter and ammonia-spraying grid (27); Wherein the liquefied ammonia evaporimeter comprises Heat Room and the stainless steel heat exchanger tube that is located in the Heat Room; Liquid ammonia storage tank (2) is communicated with stainless steel heat exchanger tube in the liquefied ammonia evaporimeter through liquefied ammonia feed-line (32); In the exhaust gases passes (19) of ammonia-spraying grid (27) between boiler and catalytic reactor; It is characterized in that: said liquefied ammonia evaporimeter is any described liquefied ammonia evaporimeter that is used for denitrating flue gas among the aforesaid right requirement 1-9; Denitration gas approach (3) on the liquefied ammonia evaporimeter advances boiler channel (21) and catalytic reactor through flue gas and is communicated with exhaust gases passes (29) between the air preheater; Denitration exhanst gas outlet (4) on the liquefied ammonia evaporimeter goes out boiler channel (22) and air preheater through flue gas and is communicated with exhaust gases passes (30) between the exhanst gas outlet; Hot-air inlets on the liquefied ammonia evaporimeter (5) is communicated with air duct (31) between the boiler through air branch road (25) and air preheater, and the hot air outlet on the liquefied ammonia evaporimeter (6) passes through mixed gas passage (26) and is communicated with ammonia-spraying grid (27).
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| CN103007558A (en) * | 2012-12-24 | 2013-04-03 | 上海建安化工设计有限公司 | Liquid ammonia evaporator |
| CN107126714A (en) * | 2017-07-01 | 2017-09-05 | 成都国化环保科技有限公司 | A kind of liquid ammonia evaporator for denitration device line |
| CN107126839A (en) * | 2017-07-01 | 2017-09-05 | 成都国化环保科技有限公司 | A kind of denitrating tower for denitration device line |
| CN107126840A (en) * | 2017-07-01 | 2017-09-05 | 成都国化环保科技有限公司 | A kind of flue gas desulfurization and denitrification equipment line |
| CN107138043A (en) * | 2017-07-01 | 2017-09-08 | 成都国化环保科技有限公司 | A kind of flue gas conditioning component for denitration device line |
| CN107138042A (en) * | 2017-07-01 | 2017-09-08 | 成都国化环保科技有限公司 | A kind of flue gas denitrification equipment line |
| CN107158912A (en) * | 2017-05-09 | 2017-09-15 | 东莞市大能环保科技有限公司 | A kind of high-temperature steam is atomized denitrification apparatus |
| CN107281931A (en) * | 2017-08-10 | 2017-10-24 | 福建鑫泽环保设备工程有限公司 | A kind of denitrating flue gas ammoniacal liquor evaporation and buffering integrated tank and its denitrating system |
| CN109163216A (en) * | 2018-09-26 | 2019-01-08 | 苏州市创优净化科技有限公司 | A kind of safety intelligent type liquid ammonia vaporization system |
| CN110180357A (en) * | 2019-06-11 | 2019-08-30 | 淮南聚生化工科技有限公司 | A kind of denitrating flue gas liquid ammonia evaporator |
| CN111744222A (en) * | 2020-06-23 | 2020-10-09 | 莫清翔 | Liquid ammonia evaporator for flue gas denitration |
| CN116617839A (en) * | 2023-05-22 | 2023-08-22 | 辽宁大唐国际锦州热电有限责任公司 | Urea hydrolysis denitration dilution air device of thermal power factory |
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