CN109945226A - A kind of coal-burning power plant's air preheater Optimizing Reconstruction method and device - Google Patents
A kind of coal-burning power plant's air preheater Optimizing Reconstruction method and device Download PDFInfo
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- CN109945226A CN109945226A CN201910185705.8A CN201910185705A CN109945226A CN 109945226 A CN109945226 A CN 109945226A CN 201910185705 A CN201910185705 A CN 201910185705A CN 109945226 A CN109945226 A CN 109945226A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The present invention provides a kind of coal-burning power plant's air preheater Optimizing Reconstruction method and devices, wherein this method comprises: obtaining hot end upper layer heat exchange element, the hot end middle layer heat exchange element of air preheater in boiler；Hot end upper layer heat exchange element and hot end middle layer heat exchange element are merged, and the material and template of the hot end heat exchange element after merging are replaced, so that the height of the hot end heat exchange element after merging is less than the sum of the height of hot end upper layer heat exchange element and hot end middle layer heat exchange element.The present invention is by merging into the lesser heat exchange element of height for the upper layer heat exchange element in hot end and middle layer heat exchange element, and the material and template of the heat exchange element are replaced simultaneously, the performance of air preheater after improvement can be optimized, alleviates black dirt clogging present in the middle layer heat exchange element of boiler air preheater.
Description
Technical field
The present invention relates to coal-fired power plant minimum discharge technical fields more particularly to a kind of coal-burning power plant's air preheater to optimize
Remodeling method and device.
Background technique
Since power plant's minimum discharge demand is universal, the boiler of power plant has carried out denitrating system transformation mostly.During this period,
Boiler air preheater becomes main replacement component.Three layer arrangements of the heat exchange element of boiler air preheater point at present, respectively
It is hot end upper layer, hot end middle layer and cold end layer.
Since denitrating system puts into operation, staff has found in the maintenance to boiler, the middle layer heat exchange of air preheater
There are serious black dirt clogging between element major part corrugated plating, the safe and stable operation of boiler is seriously affected.
Therefore, black dirt clogging present in the middle layer heat exchange element of boiler air preheater has become this field skill
Art personnel technical problem urgently to be resolved.
Summary of the invention
The embodiment of the invention provides a kind of coal-burning power plant's air preheater Optimizing Reconstruction method and devices, for solving pot
Black dirt clogging present in the middle layer heat exchange element of stove air preheater.
According to an aspect of the present invention, a kind of coal-burning power plant's air preheater Optimizing Reconstruction method is provided, comprising:
Obtain hot end upper layer heat exchange element, the hot end middle layer heat exchange element of air preheater in boiler；
Hot end upper layer heat exchange element and hot end middle layer heat exchange element are merged, and replace the heat after merging
The material and template of heat exchange element are held, so that the height of the hot end heat exchange element after merging exchanges heat less than the hot end upper layer
The sum of the height of element and hot end middle layer heat exchange element.
Preferably, described to merge hot end upper layer heat exchange element and hot end middle layer heat exchange element specifically
Are as follows:
Hot end upper layer heat exchange element and hot end middle layer heat exchange element are merged, while cold end being kept to exchange heat
Element is constant.
Preferably, the material and template of the hot end heat exchange element after the replacement merges specifically:
The material of the hot end heat exchange element after merging is changed to Q235 steel, while by the hot end after merging
The material of heat exchange element is changed to HC template.
Preferably, the thickness with a thickness of hot end middle layer heat exchange element of the hot end heat exchange element after merging.
According to another aspect of the present invention, a kind of coal-burning power plant's air preheater Optimizing Reconstruction device is provided, comprising:
Module is obtained, for obtaining hot end upper layer heat exchange element, the hot end middle layer heat exchange element of air preheater in boiler；
Merging module, for hot end upper layer heat exchange element and hot end middle layer heat exchange element to be merged, and
The material and template of hot end heat exchange element after replacement merging, so that the height of the hot end heat exchange element after merging is less than institute
State the sum of the height of hot end upper layer heat exchange element and hot end middle layer heat exchange element.
Preferably, the merging module includes:
Combining unit, for merging hot end upper layer heat exchange element and hot end middle layer heat exchange element；
Unit is replaced, for replacing the material and template of the hot end heat exchange element after merging；
The combining unit is also used to close hot end upper layer heat exchange element and hot end middle layer heat exchange element
And while keeping cold end heat exchange element constant.
Preferably, the replacement unit is also used to the material of the hot end heat exchange element after merging being changed to Q235 steel
Material, while the material of the hot end heat exchange element after merging is changed to HC template.
Preferably, the thickness with a thickness of hot end middle layer heat exchange element of the hot end heat exchange element after merging.
According to another aspect of the present invention, a kind of coal-burning power plant's air preheater Optimizing Reconstruction device, including processing are provided
Device and memory are stored with computer program instructions on the memory, the realization when described program instruction is executed by processor
Coal-burning power plant as described above air preheater Optimizing Reconstruction method.
According to another aspect of the present invention, a kind of computer readable storage medium is provided, the computer readable storage medium
On be stored with computer program instructions, realize that coal-burning power plant as described above is empty when described program instruction is executed by processor
Air preheater Optimizing Reconstruction method.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
The present invention provides a kind of coal-burning power plant's air preheater Optimizing Reconstruction method and devices, wherein this method comprises:
Obtain hot end upper layer heat exchange element, the hot end middle layer heat exchange element of air preheater in boiler；By hot end upper layer heat exchange element and
Hot end middle layer heat exchange element merges, and replaces the material and template of the hot end heat exchange element after merging, so that after merging
The height of hot end heat exchange element is less than the sum of the height of hot end upper layer heat exchange element and hot end middle layer heat exchange element.The present invention passes through
The upper layer heat exchange element in hot end and middle layer heat exchange element are merged into the lesser heat exchange element of height, and replaces this simultaneously and changes
The material and template of thermal element, the performance of the air preheater after capable of optimizing improvement, alleviate the middle layer of boiler air preheater
Black dirt clogging present in heat exchange element.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of process of one embodiment of coal-burning power plant's air preheater Optimizing Reconstruction method provided by the invention
Schematic diagram；
Fig. 2 is a kind of structure of one embodiment of coal-burning power plant's air preheater Optimizing Reconstruction device provided by the invention
Schematic diagram.
Specific embodiment
The embodiment of the invention provides a kind of coal-burning power plant's air preheater Optimizing Reconstruction method and devices, for solving pot
Black dirt clogging present in the middle layer heat exchange element of stove air preheater.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, a kind of one embodiment of coal-burning power plant's air preheater Optimizing Reconstruction method provided by the invention,
Include:
101, hot end upper layer heat exchange element, the hot end middle layer heat exchange element of air preheater in boiler are obtained；
In order to solve the problems, such as that boiler air preheater hot end middle layer heat exchange element is easy blocking, need first to obtain air pre-
Hot end upper layer heat exchange element, the hot end middle layer heat exchange element of hot device.
102, hot end upper layer heat exchange element and hot end middle layer heat exchange element are merged, and the hot end replaced after merging is changed
The material and template of thermal element, so that the height of the hot end heat exchange element after merging is less than in hot end upper layer heat exchange element and hot end
The sum of the height of layer heat exchange element.
In embodiments of the present invention, after determining hot end upper layer heat exchange element, hot end middle layer heat exchange element, hot end upper layer is changed
Thermal element and hot end middle layer heat exchange element merge, while keeping cold end heat exchange element in air preheater constant, so that closing
The height of hot end heat exchange element after and is less than the sum of the height of former hot end upper layer heat exchange element and former hot end middle layer heat exchange element.
In order to further enhance the performance of air preheater, the material of the hot end heat exchange element after merging is changed to Q235 steel, together
When the material of the hot end heat exchange element after merging is changed to HC template, and keep the hot end heat exchange element after merging with a thickness of
The thickness of former hot end middle layer heat exchange element.
The present invention is by merging into the lesser heat exchange of height for the upper layer heat exchange element in hot end and middle layer heat exchange element
Element, and the material and template of the heat exchange element are replaced simultaneously, the performance of the air preheater after capable of optimizing improvement alleviates pot
Black dirt clogging present in the middle layer heat exchange element of stove air preheater.
It below will be with a concrete application example to a kind of coal-burning power plant's air preheater Optimizing Reconstruction side provided by the invention
Method carries out further description, which includes:
Heat exchange element strip inspection situation is as follows during 1, No. 2 furnace is shut down within 2017:
There are serious black dirt clogging, portions between No. 1 furnace air preheater discovery middle layer heat exchange element major part corrugated plating
Subregion black dirt is hardened harder, and corrugated plating corrosion in part is serious, and only about 1/5th exhaust gases passes can circulate, and upper layer is changed
Thermal element is cleaner.
No. 2 furnace air preheaters it is again seen that there are more serious clogging phenomenons for one third part under the heat exchange element of middle layer, but
Most region black dirts are more open, and element corrosion is also smaller；Lower layer's heat exchange element end about 200mm height component exist compared with
Serious black dirt is hardened, and up rest part is cleaner.
To solve the problems, such as that heat accumulating element is easy blocking to hot arc at the middle and upper levels, power plant has carried out technological transformation to air preheater, has changed
The major programme made be hot end air preheater heat exchange element at the middle and upper levels is merged, wherein merge before upper level be 1000mm,
Middle layer height is 300mm, is highly 1200mm after merging, while using the heat accumulating element of the better HC waveform of anti-blocking ability,
The air preheater hot arc heat accumulating element major parameter comparison of transformation front and back is as shown in table 1.
Key data table is transformed in this air preheater of table 1
It is pre- that air leak rate of air preheater, air have been carried out in order to verify the technical effect of Retrofit of Air, after transformation
The in-site measurement work of hot device resistance, air preheater inlet and outlet flue-gas temperature.
Under 600MW steady load operating condition, two boiler air preheater import and export smoke components are tested respectively, calculate air preheater
Air leak rate of air curtain, main result are shown in Table 2 and table 3.
2 No. 1 furnace air preheater performance indicators of table measure main result
3 No. 2 furnace air preheater performance indicators of table measure main result
As shown in table 2, for No. 1 boiler under 600MW load, the side A air preheater air leakage rate is the side 8.09%, B air preheater air leakage
Rate is 7.51%, and two sides mean value is 7.80%.
As shown in table 4, for No. 2 boilers under 600MW load, the side A air preheater air leakage rate is the side 7.60%, B air preheater air leakage
Rate is 6.77%, and two sides mean value is 7.18%.
Under 600MW load, when stable operation of the boiler, respectively to the static pressure difference of 1, No. 2 boiler air preheater import and export flue
It is tested, obtains flue gas collateral resistance；The air preheater First air and Secondary Air side differential pressure that recording meter panel is shown simultaneously, obtain air
Collateral resistance, test result are shown in Table 4 and table 5.
4 No. 1 furnace air preheater resistance measurements of table and record
5 No. 2 furnace air preheater resistance measurements of table and record
As shown in Table 4, for No. 1 boiler under 600MW load, the side A air preheater cigarette collateral resistance is 1335.75Pa, the side B air preheater
Cigarette collateral resistance is 1312.32Pa, and two sides average value is 1324.04Pa；The air preheater mean resistance of First air side is 706.50Pa,；
The air preheater mean resistance of Secondary Air side is 1021.25Pa.
As shown in Table 5, for No. 2 boilers under 600MW load, the side A air preheater cigarette collateral resistance is 1641.43Pa, the side B air preheater
Cigarette collateral resistance is 1624.50Pa, and two sides average value is 1632.96Pa；The air preheater mean resistance of First air side is 775.56Pa,；
The air preheater mean resistance of Secondary Air side is 1021.66Pa.
Under 600MW steady load operating condition, two boiler air preheater import and export flue-gas temperatures, while record sheet are tested respectively
Disk correlation wind-warm syndrome parameter is modified exhaust gas temperature, and main result is shown in Table 6 and table 7.
6 No. 1 furnace air preheater performance indicators of table measure main result
7 No. 2 furnace air preheater performance indicators of table measure main result
As shown in table 6, No. 1 boiler is under 600MW load, and air preheater inlet flue gas temperature average value is 375.02 DEG C, air preheater
The average wind-warm syndrome in outlet is 322.80 DEG C, average Secondary Air temperature is 330.50 DEG C, is adapted to design air preheater entrance wind-warm syndrome
Under the conditions of average exhaust gas temperature be 132.45 DEG C.
As shown in table 7, No. 2 boilers are under 600MW load, and air preheater inlet flue gas temperature average value is 377.17 DEG C, air preheater
The average wind-warm syndrome in outlet is 312.15 DEG C, average Secondary Air temperature is 324.50 DEG C, is adapted to design air preheater entrance wind-warm syndrome
Under the conditions of average exhaust gas temperature be 132.89 DEG C.
It is the detailed description carried out to a kind of coal-burning power plant's air preheater Optimizing Reconstruction method provided by the invention above,
Below by a kind of coal-burning power plant's air preheater Optimizing Reconstruction device provided by the invention structure and connection relationship say
It is bright, referring to Fig. 2, a kind of one embodiment of coal-burning power plant's air preheater Optimizing Reconstruction device provided by the invention, comprising:
Module 201 is obtained, for obtaining hot end upper layer heat exchange element, the hot end middle layer heat exchange member of air preheater in boiler
Part；
Merging module 202 for merging hot end upper layer heat exchange element and hot end middle layer heat exchange element, and replaces conjunction
The material and template of hot end heat exchange element after and, so that the height of the hot end heat exchange element after merging exchanges heat less than hot end upper layer
The sum of the height of element and hot end middle layer heat exchange element.
Further, merging module 202 includes:
Combining unit 2021, for merging hot end upper layer heat exchange element and hot end middle layer heat exchange element；
Unit 2022 is replaced, for replacing the material and template of the hot end heat exchange element after merging；
Combining unit 2021 is also used to merge hot end upper layer heat exchange element and hot end middle layer heat exchange element, protects simultaneously
It is constant to hold cold end heat exchange element.
Further, replacement unit 2022 is also used to the material of the hot end heat exchange element after merging being changed to Q235 steel
Material, while the material of the hot end heat exchange element after merging is changed to HC template.
Further, the thickness with a thickness of hot end middle layer heat exchange element of the hot end heat exchange element after merging.
A kind of another embodiment of coal-burning power plant's air preheater Optimizing Reconstruction device provided by the invention, including processing
Device and memory are stored with computer program instructions on the memory, realized when the program instruction is executed by processor such as with
Upper coal-burning power plant's air preheater Optimizing Reconstruction method.
The invention further relates to a kind of computer readable storage medium, computer is stored on the computer readable storage medium
Program instruction realizes air preheater Optimizing Reconstruction in coal-burning power plant's as described above when the program instruction is executed by processor
Method.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of coal-burning power plant's air preheater Optimizing Reconstruction method characterized by comprising
Obtain hot end upper layer heat exchange element, the hot end middle layer heat exchange element of air preheater in boiler；
Hot end upper layer heat exchange element and hot end middle layer heat exchange element are merged, and the hot end replaced after merging is changed
The material and template of thermal element, so that the height of the hot end heat exchange element after merging is less than hot end upper layer heat exchange element
With the sum of the height of hot end middle layer heat exchange element.
2. air preheater Optimizing Reconstruction method in coal-burning power plant's according to claim 1, which is characterized in that it is described will be described
Hot end upper layer heat exchange element and hot end middle layer heat exchange element merge specifically:
Hot end upper layer heat exchange element and hot end middle layer heat exchange element are merged, while keeping cold end heat exchange element
It is constant.
3. air preheater Optimizing Reconstruction method in coal-burning power plant's according to claim 2, which is characterized in that the replacement is closed
The material and template of hot end heat exchange element after and specifically:
The material of the hot end heat exchange element after merging is changed to Q235 steel, while the hot end after merging being exchanged heat
The material of element is changed to HC template.
4. air preheater Optimizing Reconstruction method in coal-burning power plant's according to claim 3, which is characterized in that the institute after merging
State the thickness with a thickness of hot end middle layer heat exchange element of hot end heat exchange element.
5. a kind of coal-burning power plant's air preheater Optimizing Reconstruction device characterized by comprising
Module is obtained, for obtaining hot end upper layer heat exchange element, the hot end middle layer heat exchange element of air preheater in boiler；
Merging module for merging hot end upper layer heat exchange element and hot end middle layer heat exchange element, and is replaced
The material and template of hot end heat exchange element after merging, so that the height of the hot end heat exchange element after merging is less than the heat
Hold the sum of the height of upper layer heat exchange element and hot end middle layer heat exchange element.
6. air preheater Optimizing Reconstruction device in coal-burning power plant's according to claim 5, which is characterized in that the merging mould
Block includes:
Combining unit, for merging hot end upper layer heat exchange element and hot end middle layer heat exchange element；
Unit is replaced, for replacing the material and template of the hot end heat exchange element after merging；
The combining unit is also used to merge hot end upper layer heat exchange element and hot end middle layer heat exchange element, together
When keep cold end heat exchange element it is constant.
7. air preheater Optimizing Reconstruction device in coal-burning power plant's according to claim 6, which is characterized in that the replacement is single
Member is also used to the material of the hot end heat exchange element after merging being changed to Q235 steel, while by the hot end after merging
The material of heat exchange element is changed to HC template.
8. air preheater Optimizing Reconstruction device in coal-burning power plant's according to claim 7, which is characterized in that the institute after merging
State the thickness with a thickness of hot end middle layer heat exchange element of hot end heat exchange element.
9. a kind of coal-burning power plant's air preheater Optimizing Reconstruction device, which is characterized in that described to deposit including processor and memory
It is stored with computer program instructions on reservoir, realizes when described program instruction is executed by processor such as claim 1 to right
It is required that air preheater Optimizing Reconstruction method in coal-burning power plant's described in any one of 4.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer journey on the computer readable storage medium
The combustion as described in any one of claim 1 to claim 4 is realized in sequence instruction when described program instruction is executed by processor
Coal-fired plant's air preheater Optimizing Reconstruction method.
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Cited By (2)
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| CN111151131A (en) * | 2020-02-28 | 2020-05-15 | 中国华能集团清洁能源技术研究院有限公司 | Normal-temperature SCR denitration device and process for improving denitration efficiency of boiler |
| CN113670449A (en) * | 2021-08-23 | 2021-11-19 | 浙江兴核智拓科技有限公司 | Structure for measuring temperature of intermediate layer of heat storage element of air preheater on line |
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| CN208487997U (en) * | 2017-12-05 | 2019-02-12 | 哈尔滨兴隆锅炉有限公司 | New template heat-transfer element |
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| CN111151131A (en) * | 2020-02-28 | 2020-05-15 | 中国华能集团清洁能源技术研究院有限公司 | Normal-temperature SCR denitration device and process for improving denitration efficiency of boiler |
| CN111151131B (en) * | 2020-02-28 | 2024-01-30 | 中国华能集团清洁能源技术研究院有限公司 | Normal-temperature SCR denitration device and technology for improving denitration efficiency of boiler |
| CN113670449A (en) * | 2021-08-23 | 2021-11-19 | 浙江兴核智拓科技有限公司 | Structure for measuring temperature of intermediate layer of heat storage element of air preheater on line |
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