CN104482527A - Regulating system and method for regulating heat exchange area of heated surface of boiler coal economizer capable of ensuring SCR (selective catalytic reduction) safe smoke temperature - Google Patents
Regulating system and method for regulating heat exchange area of heated surface of boiler coal economizer capable of ensuring SCR (selective catalytic reduction) safe smoke temperature Download PDFInfo
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- CN104482527A CN104482527A CN201410755680.8A CN201410755680A CN104482527A CN 104482527 A CN104482527 A CN 104482527A CN 201410755680 A CN201410755680 A CN 201410755680A CN 104482527 A CN104482527 A CN 104482527A
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Abstract
The invention discloses a regulating system and method for the heat exchange area of a heated surface of a boiler coal economizer capable of ensuring the SCR (selective catalytic reduction) safe smoke temperature. The regulating system comprises a plurality of electromagnets, a plurality of iron slide blocks, a plurality of position limiting pins and a control device, wherein each electromagnet is respectively connected with the control device, and the control device controls the current of the electromagnets, so that the electromagnetic force generated by the electromagnets is controlled, each iron slide block is arranged on a straight pipe section in transverse arrangement in a coal economizer screen pipe in a sleeving way, and is positioned in the magnetic force range of the electromagnets, the position limiting pins are welded at the lower parts of the corresponding straight pipe sections provided with the iron slide blocks, the welding positions of the position limiting pins are position limiting point parts of the iron slide blocks, and the iron sliding blocks positioned on the same straight pipe section are stopped when touching the position limiting pins in the sliding process. The regulating system has the advantages that the smoke temperature control problem can be solved, and the safe operation of a subsequent SCR denitration system is ensured for meeting the existing thermal power plant pollutant discharge standard. Meanwhile, the invention discloses the regulating method of the regulating system.
Description
Technical field
The invention belongs to coal-burning boiler emission-reduction technology, specifically refer to regulating system and the method for the boiler economizer heating surface heat exchange area ensureing SCR safe cigarette temperature.
Background technology
Along with the fast development of China's economy, the installed capacity of fired power generating unit is increasing, and coal consumption also increases day by day, and thing followed pollution problem also increasingly sharpens, and the discharged nitrous oxides of coal-burning power plant has become the emphasis direction of China's control of sewage disposal.The gas denitrifying technology of China mainly contains selective catalytic reduction (SCR) and SNCR method (SNCR), wherein selective catalytic reduction (SCR) be at present in the world technology the most ripe, apply maximum denitrating techniques.
The performance of catalyst directly affects the denitration efficiency of power plant's entirety, decides the operating cost of SCR, and flue-gas temperature is the key factor affecting catalyst operation, not only decides the reaction speed of reactant, and decides reactivity and the life-span of catalyst.When the preference temperature of cigarette temperature higher than catalyst, catalyst channels and micropore can deform, and cause effective passage and area to reduce, thus make catalysqt deactivation.When the preference temperature of flue-gas temperature lower than catalyst, can there is side reaction in catalyst, and make NH3 and SO3 and H2O reaction, product sticks to catalyst surface, reduces catalytic activity.Therefore, must flue-gas temperature be controlled, SCR denitration system is normally run.
For the problems referred to above, the control cigarette temperature measure of current employing has economizer feed water by-pass, the bypass of economizer Internal Flue, the outside flue duct bypass of economizer, high-temperature flue bypass and economizer hierarchical arrangement etc., present invention also proposes a kind of the boiler heating surface heat exchange area regulating system and the method that ensure SCR safe cigarette temperature.
Summary of the invention
An object of the present invention is to provide the regulating system of the boiler economizer heating surface heat exchange area ensureing SCR safe cigarette temperature, this regulating system can solve fibre selection problem, ensure the safe operation of follow-up SCR denitration system, to meet existing thermal power plant's pollutant emission standard, meet the requirement of environmental protection.
Above-mentioned purpose of the present invention realizes by following technical solution: the regulating system ensureing the boiler economizer heating surface heat exchange area of SCR safe cigarette temperature, it is characterized in that: described regulating system comprises electromagnet, iron slide block, spacer pin and control device, described electromagnet, iron slide block and spacer pin are multiple, wherein, described electromagnet symmetrically shape is vertically attached on the front-back wall of boiler economizer tube panel, each electromagnet is all connected with described control device, control device controls the electric current of electromagnet, thus control the electromagnetic force of electromagnet generation, described iron slide block set is contained on the straight length of horizontally set in economizer tube panel, be within the scope of the magnetic force of electromagnet, iron slide block can slide along the straight length of economizer under electromagnet magneticaction, described spacer pin is welded on the bottom of the straight length that iron slide block is housed, the welding position of spacer pin is the limit point place of iron slide block, iron slide block on same straight length stops when touching spacer pin in sliding process, adjacent and the iron slide block being sleeved on below straight length in sliding process not be welded on above the spacer pin of straight length touch mutually, described regulating system passes through control device, electromagnet and spacer pin regulate iron slide block to be in the diverse location of economizer straight length, thus change the heat exchange area of flue gas and economizer surface, improve the temperature of economizer exit flue gas, ensure the normal operation of follow-up SCR denitration system.
In the present invention, described electromagnet, iron slide block and the complete setting of spacer pin, electromagnet in every suit is four pieces, wherein two pieces are attached on the front wall of boiler economizer tube panel in upper and lower shape, other two pieces are attached on the rear wall of boiler economizer tube panel in upper and lower shape, iron slide block is five pieces, be set on continuous print neighbouring in economizer tube panel five sections of straight lengths, spacer pin is also five, be welded on the bottom of five sections of straight lengths respectively corresponding to five pieces of iron slide blocks, the distance between left and right of neighbouring spacer pin is equal with the length of iron slide block.
In the present invention, described electromagnet is cuboid.Electromagnet is set to rectangular shape by the present invention, along flow of flue gas direction, often organize horizontally disposed a pair electromagnet in both sides of pipe, the electromagnet current of both sides can be controlled by switch cubicle, thus control the electromagnetic force of electromagnet generation, under different electromagnetic forces, promote slide block and slide to corresponding limit point
In the present invention, described iron slide block is cuboid, and the length of iron slide block is 15cm.
In the present invention, there is between the wide and economizer of described iron slide block the transverse pitch of 2-3mm, there is between the height of iron slide block and economizer the longitudinal pitch of 2-3mm, avoid flue gas to pass through between iron slide block as far as possible.
Electromagnet is arranged on the front-back wall of economizer tube panel by the present invention, and electromagnet is connected by circuit with switch cubicle; Switch cubicle is built with the control device controlling electromagnet current and voltage; Iron slide block is divided into some groups, and often group is made up of five row's slide blocks, and be enclosed within the tube panel of economizer respectively, every section of straight tube cover has a slide block, often organizes slide block by corresponding magnet control, can be free to slide along economizer pipeline direction; Spacer pin is welded on the limit point place of pipe, is positioned at the bottom of pipe, prevents sweep of gases spacer pin, and neighbouring spacer pin between left and right distance is its length.
The present invention passes through electric current and the magnitude of voltage of gauge tap cabinet, thus control the electromagnetic force of electromagnet, under different electromagnetic forces, iron slide block is made to slide to corresponding limit point, thus the heat exchange area changed between flue gas and economizer tube wall, improve economizer exit flue-gas temperature, ensure the normal operation of SCR denitration system.
In the process of adjusting slider, the slide block shift position on same level pipe row will ensure equal, and because gaE slide is little, flue gas leakage current between slide block can be ignored, and flow of flue gas is mainly by the impact of slide block flow-disturbing, and the pipe area of shield portions is not by sweep of gases.
Workflow of the present invention is: when boiler at low load runs, SCR denitration system inlet flue gas temperature reduces, when lower than catalyst preference temperature, along flow of flue gas direction, strengthen the electric current of each switch cubicle on the left of pipe successively, slide block is moved to centre successively, be subject to the effect of spacer pin, slide block is blocked in limit point place, so just ensure to be interconnected between upper sliding block, be unlikely to flue gas to reveal between slide block, flue gas circulation area reduces gradually, heat exchange amount between flue gas and economizer tube wall also reduces gradually, the temperature rise of economizer exit cigarette, the temperature rise of denitrating system import cigarette, ensure that catalyst normally runs in suitable temperature range.Decline in various degree according to cigarette temperature, control the circulation area of flue gas, thus regulate denitrating system inlet flue gas temperature continuously.
Two of object of the present invention is to provide the control method of the boiler economizer heating surface heat exchange area ensureing SCR safe cigarette temperature, and the method is easy to operate, and the adjustment result of the satisfaction obtained.
Above-mentioned purpose of the present invention realizes by following technical solution: the control method ensureing the boiler economizer heating surface heat exchange area of SCR safe cigarette temperature, it is characterized in that, the method comprises the steps:
(1) on the front-back wall of boiler economizer tube panel, symmetrically shape vertically attaches electromagnet, and is all connected with the control device be arranged in switch cubicle by electric wire by each electromagnet, is controlled the electromagnetic force of electromagnet generation by control device;
(2) in economizer tube panel horizontally set straight length on be set with iron slide block, iron slide block is within the scope of the magnetic force of electromagnet, can slide under electromagnet magneticaction along the straight length of economizer;
(3) spacer pin is welded with in the bottom correspondence of the straight length that iron slide block is housed, the welding position of spacer pin is the limit point place of iron slide block, iron slide block on same straight length stops when touching spacer pin in sliding process, the adjacent and iron slide block being sleeved on below straight length in sliding process not be welded on above the spacer pin of straight length touch mutually;
(4) iron slide block is regulated to be in the diverse location of economizer straight length by control device, electromagnet and spacer pin, thus change the heat exchange area of flue gas and economizer surface, improve the temperature of economizer exit flue gas, ensure the normal operation of follow-up SCR denitration system.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and instantiation, the present invention is described in further detail:
Fig. 1 is the using state figure that regulating system of the present invention is arranged in coal-burning power plant's back-end ductwork;
Fig. 2 is the adjustment schematic diagram of regulating system of the present invention when boiler at low load runs, and now the circulation area of flue gas reduces;
Fig. 3 is the adjustment schematic diagram of regulating system of the present invention when boiler at low load runs, and compared with Fig. 2, now the circulation area of flue gas reduces further;
Fig. 4 is the adjustment schematic diagram of regulating system of the present invention when boiler at low load runs, and compared with Fig. 3, now the circulation area of flue gas reduces further;
Fig. 5 is the part drawing of iron slide block in regulating system of the present invention.
Description of reference numerals,
1-economizer exit header, 2-economizer import header, 3-economizer, 31-straight length, 4-SCR denitrating system, 5,7,9-is positioned at electromagnet on the left of economizer, 6,8,10-is positioned at electromagnet on the right side of economizer, the iron slide block of 11-, 11a-slide opening, 12-spacer pin, a-is long, and b-is wide, c-is high, A-is not by sweep of gases area, and B-is not by sweep of gases area, and C-is not by sweep of gases area.
Detailed description of the invention
The regulating system of the boiler economizer heating surface heat exchange area of guarantee SCR safe cigarette temperature as shown in Figures 1 to 5, boiler can be the boiler of all models formula, economizer 3 is arranged in coal-burning power plant's back-end ductwork, enters SCR denitration system 4 from economizer 3 flue gas out.This regulating system comprises some electromagnet, iron slide block 11 and spacer pin 12 and switch cubicle, is provided with control device in switch cubicle.
Electromagnet in the present embodiment, iron slide block 11 and the complete setting of spacer pin 12, electromagnet is cuboid, iron slide block 11 is cuboid, iron slide block 11 has the slider bore 11a of suit straight length 31, the long a of iron slide block 11 is 15cm, electromagnet symmetrically shape is vertically attached on the front-back wall of boiler economizer 3 tube panel, each electromagnet is all connected with control device, control device controls the electric current of electromagnet, thus control the electromagnetic force of electromagnet generation, electromagnet in every suit is four pieces, wherein two pieces are attached on the front wall of boiler economizer 3 tube panel in upper and lower shape, other two pieces are attached on the rear wall of boiler economizer 3 tube panel in upper and lower shape, iron slide block 11 is five pieces, be set on continuous print five sections of straight lengths 31 of horizontally set neighbouring in economizer 3 tube panel, be within the scope of the magnetic force of electromagnet, iron slide block 11 can slide along the straight length 31 of economizer 3 under electromagnet magneticaction, spacer pin 12 is also five, the bottom that five sections are equipped with the straight length 31 of iron slide block 11 is welded on respectively corresponding to five pieces of iron slide blocks 11, the welding position of spacer pin 12 is the limit point place of iron slide block 11, iron slide block 11 on same straight length 31 stops when touching spacer pin 12 in sliding process, adjacent and the iron slide block 11 being sleeved on below straight length 31 in sliding process not be welded on above spacer pin 12 phase of straight length 31 touch, the distance between left and right of neighbouring spacer pin 12 is equal with the length of iron slide block 11.
The regulating system of the present embodiment regulates iron slide block 11 to be in the diverse location of economizer 3 straight length 31 by control device, electromagnet and spacer pin 12, thus change the heat exchange area of flue gas and economizer 3 heating surface, improve the temperature of economizer 3 exiting flue gas, ensure the normal operation of follow-up SCR denitration system.
The present embodiment is arranged on the front-back wall of economizer 3 tube panel by electromagnet, and electromagnet is connected (not shown in FIG.) with switch cubicle by circuit; Switch cubicle is built with the control device controlling electromagnet current and voltage; Iron slide block is divided into some groups, often group is made up of the iron slide block of five rows, be enclosed within the tube panel 3 of economizer respectively, every section of straight tube cover has an iron slide block, often organize iron slide block to be controlled by corresponding electromagnet (as shown in Fig. 15,6,7,8,9,10), can be free to slide along economizer pipeline direction; Spacer pin 12 is welded on the limit point place of pipe, is positioned at the bottom of pipe, thus prevents sweep of gases spacer pin, and neighbouring spacer pin between left and right distance is iron its length.
In the present embodiment, there is between the wide and economizer 3 of iron slide block 11 transverse pitch of 2-3mm, there is between the height of iron slide block 11 and economizer 3 longitudinal pitch of 2-3mm, avoid flue gas to pass through between iron slide block 11 as far as possible.
Electromagnet is rectangular shape, along flow of flue gas direction, horizontally disposed a pair electromagnet in both sides (as shown in Fig. 15,6) of every five combs, the electromagnet current of both sides can be controlled by switch cubicle, thus control the electromagnetic force of electromagnet generation, under different electromagnetic forces, promote iron slide block and slide to corresponding limit point, as shown in Figure 2.
The present embodiment passes through electric current and the magnitude of voltage of gauge tap cabinet, thus control the electromagnetic force of electromagnet 5,6, under different electromagnetic forces, iron slide block 11 is made to slide to corresponding limit point 12, thus the heat exchange area changed between flue gas and economizer 3 tube wall, improve economizer 3 exit gas temperature, thus ensure the normal operation of SCR denitration system 4.
In the process regulating iron slide block, iron slide block shift position on same level pipe row will ensure equal, and because iron gaE slide is little, flue gas leakage current between iron slide block can be ignored, flow of flue gas is mainly by the impact of iron slide block flow-disturbing, and the pipe area of shield portions is not by sweep of gases.
When boiler at low load runs, the inlet flue gas temperature of SCR denitration system 4 reduces, for ensureing that denitrating system 4 normally runs, take following measure: along flow of flue gas direction, strengthen the switch cubicle electric current on the left of first group of economizer pipe, iron slide block 11 is moved to centre, be subject to the effect of spacer pin 12, iron slide block 11 is blocked in limit point place, as shown in Figure 2, flue gas is stopped by iron slide block, circulation area reduces gradually, heat exchange amount between flue gas and economizer 3 tube wall also reduces gradually, economizer 3 exports cigarette temperature rise, the temperature rise of denitrating system 4 import cigarette, ensure that catalyst normally runs in suitable temperature range.Decline in various degree according to cigarette temperature, control iron slide position as shown in Figure 3, thus the circulation area of flue gas reduces further, economizer 3 exports cigarette temperature and raises further, and denitrating system 4 import cigarette temperature also raises, thus regulates denitrating system 4 inlet flue gas temperature continuously; Continuous adjustment cigarette temperature process as shown in Figure 2,3, 4, do not increased to A by sweep of gases area from a-quadrant and add B region, finally increase to A and add B and add C region, be interconnected between upper and lower iron slide block, flue gas along iron slide block flow-disturbing, thus ensures that flue gas is unlikely to wash away tube wall.
As the conversion of the present embodiment, electromagnet in regulating system, iron slide block 11 and spacer pin 12 all can arrange multiple or many covers or many groups according to actual needs, the electromagnet of each group or every suit, the quantity of iron slide block 11 and spacer pin 12 also can be determined according to actual needs, usual iron slide block 11 is identical with the quantity of spacer pin 12, and both are installed on same straight length of economizer, wherein, electromagnet symmetrically shape is vertically attached on the front-back wall of boiler economizer 3 tube panel, each electromagnet is all connected with control device, control device controls the electric current of electromagnet, thus control the electromagnetic force of electromagnet generation, iron slide block 11 is sleeved on the straight length of horizontally set in economizer 3 tube panel, be within the scope of the magnetic force of electromagnet, iron slide block can slide along the straight length of economizer under electromagnet magneticaction, spacer pin is welded on the bottom of the straight length that iron slide block is housed, the welding position of spacer pin is the limit point place of iron slide block, iron slide block on same straight length stops when touching spacer pin in sliding process, adjacent and the iron slide block being sleeved on below straight length in sliding process not be welded on above the spacer pin of straight length touch mutually.
As the conversion of the present embodiment, transverse pitch S1 between the wide b of iron slide block and economizer can at 2-3mm, the high c of iron slide block and the longitudinal pitch S2 of economizer also can in 2-3mm value, the slide block joint be connected between pipe is comparatively tight, prevent flue gas from passing through between slide block, avoid flue gas to pass through between iron slide block as far as possible.
Invention also provides the control method of the boiler economizer heating surface heat exchange area ensureing SCR safe cigarette temperature, the method comprises the steps:
(1) on the front-back wall of boiler economizer tube panel, symmetrically shape vertically attaches electromagnet, and is all connected with the control device be arranged in switch cubicle by electric wire by each electromagnet, is controlled the electromagnetic force of electromagnet generation by control device;
(2) in economizer tube panel horizontally set straight length on be set with iron slide block, iron slide block is within the scope of the magnetic force of electromagnet, can slide under electromagnet magneticaction along the straight length of economizer;
(3) spacer pin is welded with in the bottom correspondence of the straight length that iron slide block is housed, the welding position of spacer pin is the limit point place of iron slide block, iron slide block on same straight length stops when touching spacer pin in sliding process, the adjacent and iron slide block being sleeved on below straight length in sliding process not be welded on above the spacer pin of straight length touch mutually;
(4) iron slide block is regulated to be in the diverse location of economizer straight length by control device, electromagnet and spacer pin, thus change the heat exchange area of flue gas and economizer surface, improve the temperature of economizer exit flue gas, ensure the normal operation of follow-up SCR denitration system.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited thereto; all this kind is according to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned basic fundamental thought prerequisite; to the amendment of other various ways that said structure of the present invention is made, replacement or change, all should drop within protection scope of the present invention.
Claims (6)
1. ensure the regulating system of the boiler economizer heating surface heat exchange area of SCR safe cigarette temperature, it is characterized in that: described regulating system comprises electromagnet, iron slide block, spacer pin and control device, described electromagnet, iron slide block and spacer pin are multiple, wherein, described electromagnet symmetrically shape is vertically attached on the front-back wall of boiler economizer tube panel, each electromagnet is all connected with described control device, control device controls the electric current of electromagnet, thus control the electromagnetic force of electromagnet generation, described iron slide block set is contained on the straight length of horizontally set in economizer tube panel, be within the scope of the magnetic force of electromagnet, iron slide block can slide along the straight length of economizer under electromagnet magneticaction, described spacer pin is welded on the bottom of the straight length that iron slide block is housed, the welding position of spacer pin is the limit point place of iron slide block, iron slide block on same straight length stops when touching spacer pin in sliding process, adjacent and the iron slide block being sleeved on below straight length in sliding process not be welded on above the spacer pin of straight length touch mutually, described regulating system passes through control device, electromagnet and spacer pin regulate iron slide block to be in the diverse location of economizer straight length, thus change the heat exchange area of flue gas and economizer surface, improve the temperature of economizer exit flue gas, ensure the normal operation of follow-up SCR denitration system.
2. the regulating system of the boiler economizer heating surface heat exchange area of guarantee SCR safe cigarette temperature according to claim 1, it is characterized in that: described electromagnet, iron slide block and the complete setting of spacer pin, electromagnet in every suit is four pieces, wherein two pieces are attached on the front wall of boiler economizer tube panel in upper and lower shape, other two pieces are attached on the rear wall of boiler economizer tube panel in upper and lower shape, iron slide block is five pieces, be set on continuous print neighbouring in economizer tube panel five sections of straight lengths, spacer pin is also five, the bottom of five sections of straight lengths is welded on respectively corresponding to five pieces of iron slide blocks, the distance between left and right of neighbouring spacer pin is equal with the length of iron slide block.
3. the regulating system of the boiler economizer heating surface heat exchange area of guarantee SCR safe cigarette temperature according to claim 2, is characterized in that: described electromagnet is cuboid.
4. the regulating system of the boiler economizer heating surface heat exchange area of guarantee SCR safe cigarette temperature according to claim 2, is characterized in that: described iron slide block is cuboid, and the length of iron slide block is 15cm.
5. the regulating system of the boiler economizer heating surface heat exchange area of guarantee SCR safe cigarette temperature according to claim 4, it is characterized in that: the transverse pitch between the wide and economizer of described iron slide block with 2-3mm, there is between the height of iron slide block and economizer the longitudinal pitch of 2-3mm, avoid flue gas to pass through between iron slide block as far as possible.
6. ensure the control method of the boiler economizer heating surface heat exchange area of SCR safe cigarette temperature, it is characterized in that, the method comprises the steps:
(1) on the front-back wall of boiler economizer tube panel, symmetrically shape vertically attaches electromagnet, and is all connected with the control device be arranged in switch cubicle by electric wire by each electromagnet, is controlled the electromagnetic force of electromagnet generation by control device;
(2) in economizer tube panel horizontally set straight length on be set with iron slide block, iron slide block is within the scope of the magnetic force of electromagnet, can slide under electromagnet magneticaction along the straight length of economizer;
(3) spacer pin is welded with in the bottom correspondence of the straight length that iron slide block is housed, the welding position of spacer pin is the limit point place of iron slide block, iron slide block on same straight length stops when touching spacer pin in sliding process, the adjacent and iron slide block being sleeved on below straight length in sliding process not be welded on above the spacer pin of straight length touch mutually;
(4) iron slide block is regulated to be in the diverse location of economizer straight length by control device, electromagnet and spacer pin, thus change the heat exchange area of flue gas and economizer surface, improve the temperature of economizer exit flue gas, ensure the normal operation of follow-up SCR denitration system.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546562A (en) * | 2016-01-29 | 2016-05-04 | 上海久试电力技术有限公司 | Flue and control method for controlling smoke temperature and improvement method for flue |
| CN106547286A (en) * | 2016-12-26 | 2017-03-29 | 北京神雾环境能源科技集团股份有限公司 | flue gas SCR denitration intelligent temperature control device |
| CN110319452A (en) * | 2019-07-05 | 2019-10-11 | 中节能(盘锦)清洁技术发展有限公司 | Boiler smoke temperature-adjusting device and method |
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| US5101640A (en) * | 1989-12-01 | 1992-04-07 | Hitachi, Ltd. | Air conditioning apparatus, heat exchanger for use in the apparatus and apparatus control method |
| JPH06323762A (en) * | 1993-05-10 | 1994-11-25 | Medeisu Kk | Heat exchanger |
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| CN102913896A (en) * | 2012-11-20 | 2013-02-06 | 上海锅炉厂有限公司 | Coal economizer for power station boiler |
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| JPS5710099A (en) * | 1980-06-20 | 1982-01-19 | Chiyoda Chem Eng & Constr Co Ltd | Regulator for fluid outlet temperature of heat exchanger |
| US5101640A (en) * | 1989-12-01 | 1992-04-07 | Hitachi, Ltd. | Air conditioning apparatus, heat exchanger for use in the apparatus and apparatus control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546562A (en) * | 2016-01-29 | 2016-05-04 | 上海久试电力技术有限公司 | Flue and control method for controlling smoke temperature and improvement method for flue |
| CN106547286A (en) * | 2016-12-26 | 2017-03-29 | 北京神雾环境能源科技集团股份有限公司 | flue gas SCR denitration intelligent temperature control device |
| CN110319452A (en) * | 2019-07-05 | 2019-10-11 | 中节能(盘锦)清洁技术发展有限公司 | Boiler smoke temperature-adjusting device and method |
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| CN104482527B (en) | 2016-06-08 |
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