CN211450978U - Tail flue gas temperature regulating system and boiler of thermal power plant - Google Patents
Tail flue gas temperature regulating system and boiler of thermal power plant Download PDFInfo
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- CN211450978U CN211450978U CN201922009753.XU CN201922009753U CN211450978U CN 211450978 U CN211450978 U CN 211450978U CN 201922009753 U CN201922009753 U CN 201922009753U CN 211450978 U CN211450978 U CN 211450978U
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Abstract
The utility model provides a afterbody flue gas temperature regulation system and thermal power factory boiler. The tail flue gas temperature regulating system comprises a first flue, wherein the first flue comprises a first section of sub-flue, a second section of sub-flue and a third section of sub-flue which are communicated in series; the input end of the first section of sub-flue is connected with the outlet of the hearth; the output end of the third section of sub-flue is connected with a denitration device; a second flue is also directly communicated between the first section of sub-flue and the third section of sub-flue; the output end of the third section of sub-flue is also provided with a temperature sensor, and the temperature sensor is connected with the microprocessor; and a flue gas baffle is arranged in the second flue and is connected with a microprocessor through a driving mechanism, and the microprocessor is used for controlling the driving mechanism to adjust the opening of the flue gas baffle. It can adjust afterbody flue gas temperature, effectively solves because the gas temperature is low and makes denitrification facility can not drop into the problem.
Description
Technical Field
The utility model belongs to the thermal power field especially relates to a afterbody flue gas temperature regulation system and thermal power factory boiler.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The inventor finds that when the existing boiler of the thermal power plant is in low load, the tail flue gas temperature is low, and the tail flue gas temperature cannot be adjusted, so that the input condition of a denitration device cannot be reached, and nitrogen oxide NO is enabledXThe emission exceeds the standard, and the use efficiency of the unit is greatly limited.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a afterbody flue gas temperature governing system and thermal power factory boiler, it can adjust afterbody flue gas temperature, effectively solves because the gas temperature is low and make the problem that denitrification facility can not drop into, makes the boiler needn't worry NO under the low-loadXThe emission exceeds the standard, and the method has higher social benefit and economic benefit.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a first aspect provides a afterbody flue gas temperature regulation system, include:
the first flue comprises a first section of sub-flue, a second section of sub-flue and a third section of sub-flue which are communicated in series; the input end of the first section of sub-flue is connected with the outlet of the hearth; the output end of the third section of sub-flue is connected with a denitration device; the first section of sub-flue and the third section of sub-flue are also directly communicated with
A second flue; the output end of the third section of sub-flue is also provided with a temperature sensor, and the temperature sensor is connected with the microprocessor; and a flue gas baffle is arranged in the second flue and is connected with a microprocessor through a driving mechanism, and the microprocessor is used for controlling the driving mechanism to adjust the opening of the flue gas baffle.
In one embodiment, the first segment of sub-flues are vertical flues.
In one embodiment, the second segment of sub-flues are horizontal flues.
In one embodiment, the third segment of sub-flues is arranged at an acute angle to the horizontal.
In one embodiment, the microprocessor is connected to a DCS control system.
In one embodiment, the microprocessor is connected with the DCS control system through a wireless communication module.
In one embodiment, one end of the second flue is communicated with the input end of the first section of sub-flue, and the other end of the second flue is communicated with the output end of the third section of sub-flue.
A second aspect of the utility model provides a thermal power factory boiler, it includes as above-mentioned afterbody flue gas temperature regulation system.
The utility model has the advantages that:
the utility model discloses directly communicate the second flue between first section sub-flue and third section sub-flue, the temperature sensor of the output through the third section sub-flue comes the output flue gas temperature of real-time supervision third section sub-flue and conveys to microprocessor, come control actuating mechanism to adjust the aperture of flue gas baffle by microprocessor, and then reach the flue gas temperature who adjusts entering denitrification facility, make denitrification facility can normally drop into, effectively solve because the flue gas temperature is low and make the problem that denitrification facility can not drop into, make the boiler needn't worry NO under the low-load and worry NOXThe emission exceeds the standard, and the method has higher social benefit and economic benefit.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic structural view of a tail flue gas temperature adjusting system according to an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, the tail flue gas temperature adjusting system of the present embodiment includes:
the first flue 1 comprises a first section of sub-flue 1-1, a second section of sub-flue 1-2 and a third section of sub-flue 1-3 which are communicated in series; the input end of the first section of the sub-flue 1-1 is connected with the hearth outlet 2; the output end of the third section of sub-flue 1-3 is connected with the denitration device 3; a second flue 4 is also directly communicated between the first section of sub-flue 1-1 and the third section of sub-flue 1-3; the output end of the third section of sub-flue 1-3 is also provided with a temperature sensor, and the temperature sensor is connected with the microprocessor; and a flue gas baffle is arranged in the second flue and is connected with a microprocessor through a driving mechanism, and the microprocessor is used for controlling the driving mechanism to adjust the opening of the flue gas baffle.
It should be noted that, in this embodiment, the microprocessor is implemented by a 51-series single chip microcomputer, and a person skilled in the art can set the microprocessor according to a specific working condition, which is not described in detail herein.
In a specific implementation, the first segment of sub-flues are vertical flues.
The second section of sub-flue is a horizontal flue.
The third section of sub-flue is arranged at an acute angle with the horizontal direction.
In one embodiment, the microprocessor is connected to a DCS control system.
The DCS Control System (Distributed Control System) has an existing structure.
Wherein, temperature sensor is current structure, and the person of ordinary skill in the art can specifically select the model according to actual conditions. The temperature sensor is used for monitoring the output flue gas temperature of the third section of sub-flue in real time and transmitting the output flue gas temperature to the microprocessor, and the microprocessor controls the driving mechanism to adjust the opening degree of the flue gas baffle plate so as to adjust the flue gas temperature entering the denitration device.
Wherein, the flue gas baffle realizes the regulation of its aperture through actuating mechanism, and actuating mechanism can adopt driving motor or other existing actuating mechanism (such as structures such as lead screw) to realize.
The denitration device is also of a conventional structure, and the description thereof is omitted.
In one embodiment, the microprocessor is connected with the DCS control system through a wireless communication module.
As a specific implementation manner, one end of the second flue is communicated with the input end of the first segment of sub-flue, and the other end of the second flue is communicated with the output end of the third segment of sub-flue.
The outlet of the flue gas hearth sequentially flows through the first section sub-flue, the second section sub-flue and the third section sub-flue along the original flue of the boiler, the temperature of the flue gas is gradually reduced, and the flue gas reaches the denitration device and flows to rear equipment after being subjected to denitration treatment. The utility model adopts the second flue to lead the high-temperature flue gas to the inlet of the denitration device to be mixed with the lower-temperature flue gas output by the output end of the first flue, thereby achieving the purpose of improving the flue gas temperature at the inlet of the denitration device; arrange the flue gas baffle in the second flue, the flue gas baffle is closed when boiler load is high, opens the flue gas baffle when needing to use, guides high temperature flue gas to the denitrification facility entry, and the high temperature flue gas volume is adjusted to the accessible flue gas baffle, makes denitrification facility can normally drop into.
In the embodiment, the second flue is directly communicated between the first section of sub-flue and the third section of sub-flue, the temperature sensor at the output end of the third section of sub-flue monitors the output flue gas temperature of the third section of sub-flue in real time and transmits the output flue gas temperature to the microprocessor, the microprocessor controls the driving mechanism to adjust the opening degree of the flue gas baffle plate, and then the flue gas temperature entering the denitration device is adjusted, so that the denitration device can be normally put into use, the problem that the denitration device cannot be put into use due to low flue gas temperature is effectively solved, and the boiler does not need to worry about NO under low loadXThe emission exceeds the standard, and the method has higher social benefit and economic benefit.
Example 2
The present embodiment provides a thermal power plant boiler including a back pass flue gas temperature conditioning system as shown in fig. 1.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a tail flue gas temperature governing system which characterized in that includes:
the first flue comprises a first section of sub-flue, a second section of sub-flue and a third section of sub-flue which are communicated in series; the input end of the first section of sub-flue is connected with the outlet of the hearth; the output end of the third section of sub-flue is connected with a denitration device; a second flue is also directly communicated between the first section of sub-flue and the third section of sub-flue; the output end of the third section of sub-flue is also provided with a temperature sensor, and the temperature sensor is connected with the microprocessor; and a flue gas baffle is arranged in the second flue and is connected with a microprocessor through a driving mechanism, and the microprocessor is used for controlling the driving mechanism to adjust the opening of the flue gas baffle.
2. The back pass flue gas temperature conditioning system of claim 1, wherein the first segment of sub-flues is a vertical flue.
3. The back pass flue gas temperature conditioning system of claim 1, wherein the second section of sub-flues are horizontal flues.
4. The back pass flue gas temperature conditioning system of claim 3, wherein the third segment of sub-flues is disposed at an acute angle to the horizontal.
5. The back pass flue gas temperature conditioning system of claim 1, wherein the microprocessor is connected to a DCS control system.
6. The back pass flue gas temperature conditioning system of claim 5, wherein the microprocessor is connected to the DCS control system through a wireless communication module.
7. The back pass flue gas temperature regulation system of claim 1 wherein one end of the second flue communicates with an input end of the first segment of sub-flue, and the other end of the second flue communicates with an output end of the third segment of sub-flue.
8. A thermal power plant boiler, characterized by comprising a back pass flue gas temperature regulation system according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922009753.XU CN211450978U (en) | 2019-11-18 | 2019-11-18 | Tail flue gas temperature regulating system and boiler of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922009753.XU CN211450978U (en) | 2019-11-18 | 2019-11-18 | Tail flue gas temperature regulating system and boiler of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211450978U true CN211450978U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922009753.XU Active CN211450978U (en) | 2019-11-18 | 2019-11-18 | Tail flue gas temperature regulating system and boiler of thermal power plant |
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| Country | Link |
|---|---|
| CN (1) | CN211450978U (en) |
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- 2019-11-18 CN CN201922009753.XU patent/CN211450978U/en active Active
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