CN109708104B - Efficient SNCR denitration method and system for circulating fluidized bed boiler - Google Patents
Efficient SNCR denitration method and system for circulating fluidized bed boiler Download PDFInfo
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- CN109708104B CN109708104B CN201811607916.8A CN201811607916A CN109708104B CN 109708104 B CN109708104 B CN 109708104B CN 201811607916 A CN201811607916 A CN 201811607916A CN 109708104 B CN109708104 B CN 109708104B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000003546 flue gas Substances 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims description 11
- 238000009529 body temperature measurement Methods 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000036760 body temperature Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Abstract
The invention provides a high-efficiency SNCR denitration method and a system for a circulating fluidized bed boiler, which are used for detecting the temperature value and the temperature rise rate of a separator; when the temperature value is larger than the preset temperature window upper limit and the temperature rise rate is larger than the preset temperature rise rate, the logic control component generates a temperature high signal or a temperature rise rate high signal, sends an output increasing command to the secondary air system and sends a output reducing command to the flue gas recirculation system; when the temperature value is smaller than the lower limit of a preset temperature window and the temperature rise rate is larger than the preset temperature drop rate, generating a low temperature signal or a high temperature drop rate signal, sending a reducing instruction to the secondary air system and sending an output increasing instruction to the flue gas recirculation system; when the temperature value is within a preset temperature window range and the temperature rise rate is within a preset temperature rise rate range, a temperature normal signal or a temperature drop rate normal signal is generated, and a normal output instruction is sent to the overgrate air system and the flue gas recirculation system. The invention can improve the reaction efficiency and reduce the denitration operation cost of the circulating fluidized bed boiler.
Description
Technical Field
The invention belongs to the technical field of circulating fluidized bed boilers, and particularly relates to a high-efficiency SNCR denitration method and system for a circulating fluidized bed boiler.
Background
The Circulating Fluidized Bed (CFB) boiler technology is a high-efficiency low-pollution clean coal power generation technology which is rapidly developed in recent decades, the CFB boiler generally adopts an SNCR mode to remove NOx in flue gas, and the reaction temperature window is 850-1050 ℃. In recent years, the electric power demand is accelerated slowly, more and more units need peak shaving operation, and under the condition of low load, a large number of CFB boilers are subjected to normal control logic, the inlet temperature of the separator is lower than 850 ℃, so that the SNCR reaction is low in efficiency and even cannot be performed, and a large amount of reducing agent is consumed.
In the existing boiler NOx control system, the final emission amount of NOx is controlled by correcting the consumption of a reducing agent through the boiler load and the actual emission amount of NOx, which is a passive correction method, so that the NOx emission amount can be controlled, the denitration reaction efficiency is not improved from the root, and the denitration cost is increased.
In conclusion, SNCR denitration reaction efficiency in the prior art is low, so that denitration cost is high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-efficiency SNCR denitration method and system for a circulating fluidized bed boiler, which aims to improve the reaction efficiency of SNCR denitration reaction and reduce the denitration operation cost of the circulating fluidized bed boiler.
In order to solve the technical problems, the invention is realized by the following scheme:
a high-efficiency SNCR denitration method and system for a circulating fluidized bed boiler comprise the following steps:
a high-efficiency SNCR denitration method for a circulating fluidized bed boiler comprises the following steps:
s1, detecting a temperature value of a separator, and calculating a temperature rise rate of the separator;
s2, comparing the detected temperature value of the separator with a preset temperature window, and comparing the temperature rise rate of the separator with a preset temperature rise rate;
s3 is executed when the detected temperature value of the separator is larger than the preset temperature window upper limit or the temperature rise rate of the separator is larger than the preset temperature rise rate;
when the detected temperature value of the separator is smaller than the lower limit of the preset temperature window or the temperature rise rate of the separator is larger than the preset temperature drop rate, S4 is executed;
S5, executing when the detected temperature value of the separator is within a preset temperature window range or the temperature rise rate of the separator is within a preset temperature rise rate range;
S3, the logic control component generates a separator temperature high signal or a separator temperature rise rate high signal, sends an output increasing command to the secondary air system and sends an output decreasing command to the flue gas recirculation system;
s4, the logic control component generates a separator temperature low signal or a separator temperature drop rate high signal, sends a reducing instruction to the secondary air system and sends an output increasing instruction to the flue gas recirculation system;
s5, the logic control component generates a separator temperature normal signal or a separator temperature drop rate normal signal, sends a normal command to the secondary air system and sends a normal output command to the flue gas recirculation system.
Further, in S1, detecting, by the temperature measurement assembly, a temperature value of the separator and a temperature rise rate of the separator includes detecting any one of a separator inlet horizontal flue, a separator outlet horizontal flue, and a separator body temperature value.
Further, in S2, the preset temperature window refers to the SNCR reaction temperature interval determined by the combustion adjustment test.
Further, the output increasing instruction comprises opening a valve of the flue gas recirculation system or opening the power of the overgrate air system;
The instruction for reducing the output comprises the step of closing a valve of the smoke recirculation system or closing the power of the overgrate air system.
The utility model provides a high-efficient SNCR deNOx systems of circulating fluidized bed boiler, includes separator, overgrate air system, flue gas recirculation system, temperature measurement subassembly and logic control subassembly, temperature measurement subassembly is used for acquireing the temperature value of separator and the temperature rise rate of separator, and logic control subassembly's signal output part is connected logic control subassembly's signal input part, and logic control subassembly controls overgrate air system and flue gas recirculation system.
Further, the logic control component is used for sending an output increasing instruction to the secondary air system and sending an output reducing instruction to the flue gas recirculation system when the temperature value of the separator is detected to be larger than the preset temperature window upper limit or the temperature rise rate of the separator is detected to be larger than the preset temperature rise rate; when the temperature value of the separator is detected to be smaller than the lower limit of a preset temperature window or the temperature drop rate of the separator is larger than the preset temperature drop rate, a reducing instruction is sent to the secondary air system, and an output increasing instruction is sent to the flue gas recirculation system; and when the detected temperature value of the separator is within a preset temperature window range or the temperature rise rate of the separator is within a preset temperature rise rate range, sending a normal instruction to the secondary air system and sending a normal output instruction to the flue gas recirculation system.
Further, the device also comprises a hearth, a primary air system and a chimney, wherein the primary air system and the secondary air system are both communicated with the hearth, the hearth is communicated with the separator, and the separator is communicated with the chimney.
Further, an induced draft fan is arranged between the separator and the chimney, and the induced draft fan discharges generated flue gas into the chimney after passing through the separator.
Further, an SNCR spray gun is arranged on the separator, and the SNCR spray gun sprays a reducing agent into the separator to perform reaction denitration.
Further, the logic control component is system hardware and software for controlling the operation of the boiler body and the auxiliary machine.
Compared with the prior art, the invention has at least the following beneficial effects: the temperature measuring component is used for detecting the temperature value of the separator, and the temperature rise rate of the separator is calculated; then comparing the detected temperature value of the separator with a preset temperature window value, and comparing the temperature rise rate of the separator with a preset temperature rise rate; when the detected temperature value of the separator is larger than the preset temperature window high limit value or the temperature rise rate of the separator is larger than the preset temperature rise rate, the logic control component generates a separator temperature high signal or a separator temperature rise rate high signal, sends an output increasing command to the overgrate air system, sends an output reducing command to the flue gas recirculation system, and the temperature of the separator is reduced to be within the preset temperature window value range; when the detected temperature value of the separator is smaller than the lower limit value of the preset temperature window or the temperature rise rate of the separator is larger than the preset temperature drop rate, the logic control component generates a separator temperature low signal or a separator temperature drop rate high signal, sends a reducing instruction to the overgrate air system, sends an output increasing instruction to the flue gas recirculation system, and the temperature of the separator is increased to be within the range of the preset temperature window; when the detected temperature value of the separator is within a preset temperature window value range or the temperature rise rate of the separator is within the preset temperature rise rate range, the logic control component generates a normal separator temperature signal or a normal separator temperature drop rate signal, sends a normal instruction to the overgrate air system, sends a normal output instruction to the flue gas recirculation system, and maintains the separator temperature within the preset temperature window value range. The invention provides an active high-efficiency SNCR denitration method, which is characterized in that a separator temperature value and a separator temperature change rate are obtained and compared with a preset value to automatically trigger a control logic to perform denitration optimization. Therefore, when the temperature of the reactor deviates from a temperature window to cause the consumption of the reducing agent to increase or the reaction to stop, the reaction efficiency is improved, and the denitration operation cost of the circulating fluidized bed boiler is reduced.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a circulating fluidized bed boiler provided by an embodiment of the present invention;
FIG. 2 is a control flow diagram of the present invention;
FIG. 3 is a schematic diagram illustrating logic control of the S3 logic control module in FIG. 2;
FIG. 4 is a schematic diagram illustrating logic control of the S4 logic control module in FIG. 2;
FIG. 5 is a schematic diagram of the logic control of the S5 logic control module in FIG. 2;
FIG. 6 is a schematic diagram of a control system according to the present invention.
Icon: 10-hearth; 110-separator; 120-a secondary air system; 130-a flue gas recirculation system; 140-induced draft fan; 150-primary air system; 160-SNCR spray gun; 170-chimney.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the circulating fluidized bed boiler comprises a furnace 10, a separator 110, a secondary air system 120, a flue gas recirculation system 130, an induced draft fan 140, a primary air system 150, an SNCR spray gun 160, a chimney 170, a temperature control component and a logic control component, wherein the primary air system 150 and the secondary air system 120 are communicated with the furnace 10, the furnace 10 is communicated with the separator 110, the separator 110 is communicated with the chimney 170, the induced draft fan 140 is arranged between the separator 110 and the chimney 170, and the SNCR spray gun 160 is arranged on the separator 110. The primary air system 150 and the secondary air system 120 send air into the hearth 10 to support combustion, the generated flue gas passes through the separator 110 and is discharged into the chimney 170 through the induced draft fan 140, the SNCR spray gun sprays the reducing agent into the separator 110 to perform reaction denitration, and the flue gas recirculation 130 returns part of the flue gas to the hearth 10.
As shown in fig. 6, the temperature measurement component is configured to obtain a temperature value of the separator 110 and a temperature rise rate of the separator 110, and a signal output end of the temperature measurement component is connected to a signal input end of the logic control component, where the logic control component controls the overgrate air system 120 and the flue gas recirculation system 130.
As shown in fig. 2, as a certain preferred embodiment of the present invention, the logic control component, i.e. the system hardware and software for controlling the operation of the boiler body and the auxiliary machine, sends an increase output command to the overgrate air system 120 and sends a decrease output command to the flue gas recirculation system 130 when detecting that the temperature value of the separator 110 is greater than the upper limit of the preset temperature window or the temperature rise rate of the separator 110 is greater than the preset temperature rise rate; when the temperature value of the separator 110 is detected to be smaller than the lower limit of the preset temperature window or the temperature drop rate of the separator 110 is larger than the preset temperature drop rate, a reducing instruction is sent to the overgrate air system 120, and an output increasing instruction is sent to the flue gas recirculation system 130; when the detected temperature value of the separator 110 is within a preset temperature window range, or the temperature rise rate of the separator 110 is within a preset temperature rise rate range, a normal command is sent to the overgrate air system 120, and a normal output command is sent to the flue gas recirculation system 130.
As a result of intensive studies and practices by the inventor, it has been found that, during operation of the circulating fluidized bed boiler, the temperature of the separator 110 connected to the furnace 10 can be controlled by adjusting the output of the secondary air system 120 and the output of the flue gas recirculation system 130, thereby improving the NOx reaction efficiency between the reducing agent injected from the SNCR lance 160 and the flue gas. For example, as the temperature of the separator 110 decreases, the SNCR reaction efficiency decreases, increasing the temperature of the separator 110 by decreasing the output of the overgrate air system 120, or increasing the output of the flue gas recirculation system 130.
In the present embodiment, therefore, the temperature and the rising and falling rate of the separator 110 are detected as the judgment basis to perform the efficient denitration control. The embodiment provides a high-efficiency SNCR denitration system for detecting the temperature of the separator 110, and controlling the working states of the overgrate air system 120 and the flue gas recirculation system 130 according to the detection result, so as to achieve the effect of improving the denitration efficiency.
As shown in fig. 2, a method and a system for efficient SNCR denitration of a circulating fluidized bed boiler include the following steps:
S1, a temperature measuring assembly detects a temperature value of a separator 110, calculates a temperature rise rate of the separator 110, and as a certain preferred embodiment of the invention, the temperature measuring assembly comprises a separator temperature high detecting unit for detecting the temperature value, a separator temperature low detecting unit for detecting the temperature value, and a separator temperature normal detecting unit for detecting the temperature value of the separator; the temperature measuring component detects any one temperature value of an inlet horizontal flue of the separator 110, an outlet horizontal flue of the separator 110 and a body of the separator 110, wherein the inlet, the outlet and the body temperature detecting unit of the separator 110 simultaneously comprise a plurality of sampling points;
s2, comparing the detected temperature value of the separator 110 with a preset temperature window, wherein the preset temperature window refers to an optimal temperature interval of SNCR reaction determined by a combustion adjustment test, and comparing the temperature rise rate of the separator 110 with a preset temperature rise rate;
When the detected temperature value of the separator 110 is greater than the preset temperature window upper limit, or the temperature rise rate of the separator 110 is greater than the preset temperature rise rate, S3 is performed;
when the detected temperature value of the separator 110 is less than the preset temperature window lower limit, or the temperature rise rate of the separator 110 is greater than the preset temperature drop rate, S4 is performed;
When the detected temperature value of the separator 110 is within the preset temperature window range, or the temperature rise rate of the separator 110 is within the preset temperature rise rate range, S5 is performed;
S3, the logic control component generates a high temperature signal of the separator 110 or a high temperature rise rate signal of the separator 110, sends an output increasing command to the overgrate air system 110, turns on the power of the overgrate air system 120, sends an output reducing command to the flue gas recirculation system 110, and turns off the gate of the flue gas recirculation system 130;
s4, the logic control component generates a low temperature signal of the separator 110 or a high temperature drop rate signal of the separator 110, sends a reducing instruction to the overgrate air system 120, turns off the power of the overgrate air system 120, sends an output increasing instruction to the flue gas recirculation system 130, and turns on the gate of the flue gas recirculation system 130;
S5, the logic control component generates a separator 110 temperature normal signal or a separator 110 temperature drop rate normal signal, sends a normal command to the overgrate air system 120 and sends a normal output command to the flue gas recirculation system 130.
In this embodiment, the logic control component performs judgment control of efficient denitration according to the data obtained by the temperature detection component.
As shown in fig. 3, 4 and 5, the logic control module obtains the temperature value of the separator 110, and when detecting that the temperature of the separator 110 is greater than the upper limit of the preset separator temperature window, or the temperature rise rate of the separator 110 is greater than the preset separator temperature rise rate, delays for 3s, sends an instruction to start the overgrate air system, and simultaneously sends an instruction to shut down the flue gas recirculation system. Wherein, as a certain preferred embodiment of the invention, the upper limit of the preset separation temperature window can be set to 900 ℃, and the temperature rise rate of the preset separator can be set to 1 ℃/s.
In summary, according to the high-efficiency denitration method and system provided by the invention, the temperature value of the separator 110 and the temperature change rate of the separator 110 are obtained, and compared with the preset value, so that the control logic is automatically triggered to perform denitration optimization. Therefore, when the temperature of the reactor deviates from a temperature window to cause the consumption of the reducing agent to increase or the reaction to stop, the reaction efficiency is improved, and the denitration operation cost of the circulating fluidized bed boiler is reduced.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a high-efficient SNCR deNOx systems of circulating fluidized bed boiler which characterized in that: the device comprises a separator (110), a secondary air system (120), a flue gas recirculation system (130), a temperature measurement assembly and a logic control assembly, wherein the temperature measurement assembly is used for acquiring a temperature value of the separator (110) and a temperature rise rate of the separator (110), a signal output end of the temperature measurement assembly is connected with a signal input end of the logic control assembly, and the logic control assembly controls the secondary air system (120) and the flue gas recirculation system (130); the logic control component is used for sending an output increasing instruction to the overgrate air system (120) and sending an output decreasing instruction to the flue gas recirculation system (130) when the temperature value of the separator (110) is detected to be larger than the preset temperature window upper limit or the temperature rising rate of the separator (110) is detected to be larger than the preset temperature rising rate; when the temperature value of the separator (110) is detected to be smaller than the lower limit of a preset temperature window or the temperature drop rate of the separator (110) is detected to be larger than the preset temperature drop rate, a reducing instruction is sent to the overgrate air system (120), and an output increasing instruction is sent to the flue gas recirculation system (130); when the detected temperature value of the separator (110) is within a preset temperature window range or the temperature rise rate of the separator (110) is within a preset temperature rise rate range, a normal instruction is sent to the overgrate air system (120), and a normal output instruction is sent to the flue gas recirculation system (130); the device further comprises a hearth (10), a primary air system (150) and a chimney (170), wherein the primary air system (150) and the secondary air system (120) are both communicated with the hearth (10), the hearth (10) is communicated with a separator (110), and the separator (110) is communicated with the chimney (170); the separator (110) is provided with an SNCR spray gun (160), and the SNCR spray gun (160) sprays reducing agent into the separator (110) to perform reaction denitration.
2. The system according to claim 1, wherein: an induced draft fan (140) is arranged between the separator (110) and the chimney (170), and the induced draft fan (140) discharges generated flue gas into the chimney (170) after passing through the separator (110).
3. The system according to claim 1, wherein: the logic control component is system hardware and software for controlling the boiler body and auxiliary machine to operate.
4. A method for high-efficiency SNCR denitration of a circulating fluidized bed boiler, characterized in that the method for high-efficiency SNCR denitration of a circulating fluidized bed boiler according to any one of claims 1 to 3 is used, comprising the steps of:
s1, detecting a temperature value of a separator (110), and calculating a temperature rise rate of the separator (110);
s2, comparing the detected temperature value of the separator (110) with a preset temperature window, and comparing the temperature rise rate of the separator (110) with a preset temperature rise rate;
When the detected temperature value of the separator (110) is greater than the preset temperature window upper limit, or the temperature rise rate of the separator (110) is greater than the preset temperature rise rate, executing S3;
When the detected temperature value of the separator (110) is less than the preset temperature window lower limit, or the temperature rise rate of the separator (110) is greater than the preset temperature drop rate, executing S4;
When the detected temperature value of the separator (110) is within a preset temperature window range, or the temperature rise rate of the separator (110) is within a preset temperature rise rate range, performing S5;
S3, the logic control component generates a separator (110) temperature high signal or a separator (110) temperature rise rate high signal, sends an output increasing command to the secondary air system (120), and sends an output reducing command to the flue gas recirculation system (130);
s4, the logic control component generates a low temperature signal of the separator (110) or a high temperature drop rate signal of the separator (110), sends a reducing instruction to the overgrate air system (120), and sends an output increasing instruction to the flue gas recirculation system (130);
S5, the logic control component generates a separator (110) temperature normal signal or a separator (110) temperature drop rate normal signal, sends a normal command to the secondary air system (120), and sends a normal output command to the flue gas recirculation system (130);
S1, detecting a temperature value of a separator (110) and a temperature rise rate of the separator (110) through a temperature measuring assembly, wherein the temperature measuring assembly comprises a step of detecting any one temperature value of an inlet horizontal flue of the separator (110), an outlet horizontal flue of the separator (110) and a separator (110) body;
S2, the preset temperature window refers to an SNCR reaction temperature interval determined through a combustion adjustment test;
The increased output instruction comprises a door opening of a flue gas recirculation system (130) or power of a secondary air system (120);
The reduced output command includes turning off a throttle of the flue gas recirculation system (130) or turning off power of the overgrate air system (120).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811607916.8A CN109708104B (en) | 2018-12-27 | Efficient SNCR denitration method and system for circulating fluidized bed boiler |
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| CN201811607916.8A CN109708104B (en) | 2018-12-27 | Efficient SNCR denitration method and system for circulating fluidized bed boiler |
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| CN109708104B true CN109708104B (en) | 2024-07-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224939A (en) * | 2016-07-29 | 2016-12-14 | 浙江大学 | Circulating fluid bed domestic garbage burning boiler bed temperature Forecasting Methodology and system |
| CN106439796A (en) * | 2016-11-09 | 2017-02-22 | 中国环境科学研究院 | Flue gas volume/nitric oxide emission reduction system of low-load coal-fired boiler |
| CN108870384A (en) * | 2018-04-28 | 2018-11-23 | 东南大学 | The burning of low nitrogen burning circulating fluidized bed boiler and SNCR denitration cooperative optimization method |
| CN210021695U (en) * | 2018-12-27 | 2020-02-07 | 中国华能集团清洁能源技术研究院有限公司 | High-efficient SNCR deNOx systems of circulating fluidized bed boiler |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224939A (en) * | 2016-07-29 | 2016-12-14 | 浙江大学 | Circulating fluid bed domestic garbage burning boiler bed temperature Forecasting Methodology and system |
| CN106439796A (en) * | 2016-11-09 | 2017-02-22 | 中国环境科学研究院 | Flue gas volume/nitric oxide emission reduction system of low-load coal-fired boiler |
| CN108870384A (en) * | 2018-04-28 | 2018-11-23 | 东南大学 | The burning of low nitrogen burning circulating fluidized bed boiler and SNCR denitration cooperative optimization method |
| CN210021695U (en) * | 2018-12-27 | 2020-02-07 | 中国华能集团清洁能源技术研究院有限公司 | High-efficient SNCR deNOx systems of circulating fluidized bed boiler |
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