CN103528041A - Super (super) critical boiler high temperature heating surface pipe wall temperature measuring point optimizing method - Google Patents
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Abstract
Disclosed is a super (super) critical boiler high temperature heating surface tube wall temperature measuring point optimizing method. The method comprises the steps that firstly, temperature comparative analysis is conducted on a high temperature heating surface and a whole screen tube row in the hearth width direction and then wall temperature measuring points are additionally installed on tube row whole screens which are high in wall temperature and located on the left side of a hearth, the middle of the hearth and the right side of hearth; in the hearth width direction of a rear screen super-heater, a final-stage super-heater and a final-stage reheater, wall temperature measuring points are additionally installed on tubes which are high in wall temperature and arranged in the middle of tube panels in removed tube panels according to the number of the tube panels; tube wall temperature measuring points of the high temperature heating surface are additionally arranged in the tube screens which are located in the middles of steam inlet headers on the two sides of the rear screen super-heater and the two sides of the final-stage super-heater and where foreign bodies are prone to accumulating. According to the super (super) critical boiler high temperature heating surface tube wall temperature measuring point optimizing method, the wall temperature measuring points of the high temperature heating surface are added reasonably, wall temperature changes of the tubes of the high temperature heating surface are monitored and the principle that main reheated steam temperature is adjusted according to the wall temperature of the heating surface is used for conducting combustion optimization adjustment, and therefore the problem of tube overheat of the high temperature heating surface is effectively controlled.
Description
Technical field
The present invention relates to a kind of super (super-) critical boiler high temperature heating surface tube wall temperature measuring point optimization method.
Background technology
The high-temperature surface of the super (super-) critical boiler using in thermal power plant at present comprises superheater and the reheater that pipeline connects, as shown in Figure 1, superheater comprises the low temperature superheater that pipeline connects, division pendant superheater, rear screen superheater and finishing superheater, as shown in Figure 2, reheater comprises low-temperature reheater and the final reheater that pipeline connects, in order to prevent the pipe overtemperature of high-temperature surface, need to come monitoring pipe wall temperature to change by warm measuring point is set on tube wall, arranging of current temperature measuring point is as follows: shield afterwards and on superheater (35 screen * 19 pipes), 5 warm measuring points are set (2-1(represents the 2nd screen, the 1st pipe), 8-1, 15-1, 21-1, 28-1, 34-1), on finishing superheater (* 15 pipes of 56 screens), 5 warm measuring points (2-1,13-1,23-1,34-1,44-1) are set, on final reheater (* 11 pipes of 70 screens), 5 warm measuring points (2-1,15-1,29-1,42-1,56-1) are set.
According to whole screen tube wall temperature, distribute after contrast, can learn, the tube wall temperature of the 1st pipe of rear screen superheater, finishing superheater and final reheater is not the pipe of maximum temperature, therefore warm measuring point is set on this pipe heating surface tube wall temperature is monitored to there is no referential, can not provide foundation accurately for the burning adjustment of boiler operatiopn.
Summary of the invention
A kind of super (super-) critical boiler high temperature heating surface tube wall temperature measuring point optimization method provided by the invention, by reasonable increase wall temperature measuring point, the pipe wall temperature of monitoring high-temperature surface changes, according to heating surface tube wall temperature, adjust the principle of main reheated steam temperature, carry out burning optimization adjustment, effectively controlled the pipe overtemperatute of high-temperature surface.
In order to achieve the above object, the invention provides a kind of super (super-) critical boiler high temperature heating surface tube wall temperature measuring point optimization method, this optimization method comprises following steps:
High-temperature surface is arranged to the result of carrying out temperature analysis contrast in furnace chamber width and whole screen pipe: the 1st root canal wall temperature of shielding afterwards superheater, finishing superheater and final reheater is not the pipe of maximum temperature, heating surface tube wall temperature is monitored to there is no referential;
The tube wall temperature measuring point of step 2, increase high-temperature surface.
Described step 1 comprises following steps:
Step 1.1, high-temperature surface is carried out to temperature analysis contrast in furnace chamber width;
Temperature analysis comparing result: the left side high temperature dot that shields afterwards superheater shields at the 5th comb, and right side high temperature dot shields at the 34th comb; The left side high temperature dot of finishing superheater shields at the 10th comb, and right side high temperature dot shields at the 54th comb; The left side high temperature dot of final reheater shields at the 12nd comb, and right side high temperature dot shields at the 64th comb;
Step 1.2, high-temperature surface is carried out to temperature analysis contrast whole screen pipe row;
Temperature analysis comparing result: shield afterwards the high temperature dot of superheater at the 6th, 14 pipes; The high temperature dot of finishing superheater is at the 6th pipe; The high temperature dot of final reheater is at the 5th, 8 pipes;
Described step 2 comprises following steps:
Step 2.1, on the left right side of the burner hearth of rear screen superheater, finishing superheater and final reheater, select respectively pipe that wall temperature is higher to arrange whole screen to increase wall temperature measuring point is installed;
Step 2.2, in the furnace chamber width of rear screen superheater, finishing superheater and final reheater, according to the tube panel quantity pipe that wall temperature is higher in the middle of comb screen, increase wall temperature measuring point is installed;
Step 2.3, at the middle part of the double-entry header of rear screen superheater and finishing superheater, easily accumulate pipe in the tube panel of foreign matter and increase wall temperature measuring point is installed.
The present invention is by rationally increasing wall temperature measuring point, and the pipe wall temperature of monitoring high-temperature surface changes, and adjusts the principle of main reheated steam temperature according to heating surface tube wall temperature, carries out burning optimization adjustment, has effectively controlled the pipe overtemperatute of high-temperature surface.
Accompanying drawing explanation
Fig. 1 is the distribution schematic diagram of boiler superheater system;
Fig. 2 is the distribution schematic diagram of boiler reheater system;
Fig. 3 is under 536MW operating mode, the tube wall temperature distribution map of No. 2 boilers rear screen superheater in furnace chamber width;
Fig. 4 is under 536MW operating mode, the tube wall temperature distribution map of No. 2 boilers finishing superheater in furnace chamber width;
Fig. 5 is under 536MW operating mode, the tube wall temperature distribution map of No. 2 boilers final reheater in furnace chamber width;
Fig. 6 is under 536MW operating mode, the tube wall temperature distribution map of No. 3 boilers rear screen superheater in furnace chamber width;
Fig. 7 is under 536MW operating mode, the tube wall temperature distribution map of No. 3 boilers finishing superheater in furnace chamber width;
Fig. 8 is under 536MW operating mode, the tube wall temperature distribution map of No. 3 boilers final reheater in furnace chamber width;
Fig. 9 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 boilers rear screen superheater in furnace chamber width;
Figure 10 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 boilers finishing superheater in furnace chamber width;
Figure 11 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 boilers final reheater in furnace chamber width;
Figure 12 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 boilers rear screen superheater in furnace chamber width;
Figure 13 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 boilers finishing superheater in furnace chamber width;
Figure 14 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 boilers final reheater in furnace chamber width;
Figure 15 is under 662MW operating mode, and No. 2 boilers are at the tube wall temperature distribution map of the whole screen of rear screen superheater;
Figure 16 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 whole screens of boiler finishing superheater;
Figure 17 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 whole screens of boiler final reheater;
Figure 18 is under 660MW operating mode, shields the tube wall temperature distribution map of the whole screen of superheater after No. 3 boilers;
Figure 19 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 whole screens of boiler finishing superheater;
Figure 20 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 whole screens of boiler final reheater.
The specific embodiment
Following according to Fig. 3～Figure 20, illustrate preferred embodiment of the present invention.
The invention provides a kind of super (super-) critical boiler high temperature heating surface tube wall temperature measuring point optimization method, this optimization method comprises following steps:
In an embodiment of the present invention, respectively the high-temperature surface of No. 2 boilers of the international Lv Si of Jiangsu Datang port genco and No. 3 boilers (being all the 660MW ultra-supercritical boiler that Harbin Boiler Plant is produced) is carried out to temperature contrast.
Step 1.1, high-temperature surface is carried out to temperature analysis contrast in furnace chamber width.
Step 1.1.1, under unit load 536MW operating mode, 2, No. 3 boiler high temperature heating surfaces are carried out to the tube wall temperature contrast that distributes in furnace chamber width.
Fig. 3 is under 536MW operating mode, the tube wall temperature distribution map of No. 2 boilers rear screen superheater in furnace chamber width; Fig. 4 is under 536MW operating mode, the tube wall temperature distribution map of No. 2 boilers finishing superheater in furnace chamber width; Fig. 5 is under 536MW operating mode, the tube wall temperature distribution map of No. 2 boilers final reheater in furnace chamber width; Fig. 6 is under 536MW operating mode, the tube wall temperature distribution map of No. 3 boilers rear screen superheater in furnace chamber width; Fig. 5 is under 536MW operating mode, the tube wall temperature distribution map of No. 3 boilers finishing superheater in furnace chamber width; Fig. 8 is under 536MW operating mode, the tube wall temperature distribution map of No. 3 boilers final reheater in furnace chamber width.
Tube wall temperature distribution comparative analysis: shield afterwards superheater maximum temperature tube panel and be mainly distributed in the left and right sides: 4,5,6,33,34, No. 35 pipes; Finishing superheater maximum temperature tube panel is mainly distributed in 48,52,53, No. 55 pipes in right side (No. 10, left side pipe is higher); Final reheater maximum temperature tube panel is mainly distributed in No. 12,14,62,64,66,68, right side pipe.
Step 1.1.2, under unit load 662MW operating mode, No. 2 Surface in High Temperature Part of Boiler thorax widths are carried out to tube wall temperature distribution contrast, under unit load 660MW operating mode, No. 3 Surface in High Temperature Part of Boiler thorax widths are carried out to tube wall temperature distribution contrast.
Fig. 9 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 boilers rear screen superheater in furnace chamber width; Figure 10 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 boilers finishing superheater in furnace chamber width; Figure 11 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 boilers final reheater in furnace chamber width; Figure 12 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 boilers rear screen superheater in furnace chamber width; Figure 13 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 boilers finishing superheater in furnace chamber width; Figure 14 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 boilers final reheater in furnace chamber width.
Tube wall temperature distribution comparative analysis: shield afterwards superheater maximum temperature tube panel and be mainly distributed in the left and right sides: 4,5,6,33,34, No. 35 pipes; Finishing superheater maximum temperature tube panel is mainly distributed in 48,52,53, No. 55 pipes in right side (No. 10, left side pipe is higher); Final reheater maximum temperature tube panel is mainly distributed in No. 12,14,62,64,66,68, right side pipe.
Temperature analysis comparing result: the left side high temperature dot that shields afterwards superheater shields at the 5th comb, and right side high temperature dot shields at the 34th comb; The left side high temperature dot of finishing superheater shields at the 10th comb, and right side high temperature dot shields at the 54th comb; The left side high temperature dot of final reheater shields at the 12nd comb, and right side high temperature dot shields at the 64th comb.
Step 1.2, high-temperature surface is carried out to temperature analysis contrast whole screen pipe row.
Under unit load 662MW operating mode, No. 2 boiler high temperature heating surfaces are carried out to the contrast of whole screen pipe row wall temperature; Under unit load 660MW operating mode, No. 3 boiler high temperature heating surfaces are carried out to the contrast of whole screen pipe row wall temperature.
Figure 15 is under 662MW operating mode, and No. 2 boilers are at the tube wall temperature distribution map of the whole screen of rear screen superheater; Figure 16 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 whole screens of boiler finishing superheater; Figure 17 is under 662MW operating mode, the tube wall temperature distribution map of No. 2 whole screens of boiler final reheater; Figure 18 is under 660MW operating mode, shields the tube wall temperature distribution map of the whole screen of superheater after No. 3 boilers; Figure 19 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 whole screens of boiler finishing superheater; Figure 20 is under 660MW operating mode, the tube wall temperature distribution map of No. 3 whole screens of boiler final reheater.
Temperature analysis comparing result: shield afterwards the high temperature dot of superheater at the 6th, 14 pipes; The high temperature dot of finishing superheater is at the 6th pipe; The high temperature dot of final reheater is at the 5th, 8 pipes.
High-temperature surface is arranged to the result of carrying out temperature analysis contrast in furnace chamber width and whole screen pipe: the 1st (the former design wall temperature measuring point) tube wall temperature that shields afterwards superheater, finishing superheater and final reheater is not the pipe of maximum temperature, heating surface tube wall temperature is monitored to there is no referential.
The tube wall temperature measuring point of step 2, increase high-temperature surface.
Step 2.1, on the left right side of the burner hearth of rear screen superheater, finishing superheater and final reheater, select respectively pipe that wall temperature is higher to arrange whole screen to increase wall temperature measuring point is installed.
Step 2.2, in the furnace chamber width of rear screen superheater, finishing superheater and final reheater, according to the tube panel quantity pipe that wall temperature is higher in the middle of comb screen, increase wall temperature measuring point is installed.
Step 2.3, at the middle part of the double-entry header of rear screen superheater and finishing superheater, easily accumulate the 6th, 7,8,9,10,11,12,13 pipes in 7 tube panels of foreign matter and increase wall temperature measuring points are installed.
In the present embodiment, the tube wall temperature measuring point that increases high-temperature surface is as follows:
1, at rear screen superheater, increase altogether 137 tube wall temperature measuring points.
1.1, whole screen (5 screens, 27 screens, 34 screens) installs 56 measuring points additional.
Table 1: left several the 5th screens (right several the 31st screens).
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Numbering | 5-1 | 5-2 | 5-3 | 5-4 | 5-5 | 5-6 | 5-7 | 5-8 | 5-9 | 5-10 |
| Pipeloop (counting outward) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | ? |
| Numbering | 5-11 | 5-12 | 5-13 | 5-14 | 5-15 | 5-16 | 5-17 | 5-18 | 5-19 | ? |
Table 2: left several the 27th screens (right several the 9th screens).
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Numbering | 27-1 | 27-2 | 27-3 | 27-4 | 27-5 | 27-6 | 27-7 | 27-8 | 27-9 | 27-10 |
| Pipeloop (counting outward) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | ? |
| Numbering | 27-11 | 27-12 | 27-13 | 27-14 | 27-15 | 27-16 | 27-17 | 27-18 | 27-19 | ? |
Table 3: left several the 34th screens (right several the 2nd screens).
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Numbering | Fill | 34-2 | 34-3 | 34-4 | 34-5 | 34-6 | 34-7 | 34-8 | 34-9 | 34-9 |
| Pipeloop (counting outward) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | ? |
| Numbering | 34-11 | 34-12 | 34-13 | 34-14 | 34-15 | 34-16 | 34-17 | 34-18 | 34-19 | ? |
1.2, furnace chamber width increases wall temperature measuring point: the 10th pipe of every screen, totally 32 points.
1.3, the 6th, 7,8,9,10,11,12,13 pipes of foreign matter pipe row 14-20 screen, totally 49 points are easily accumulated in header middle part.
2, finishing superheater increases by 125 tube wall temperature measuring points altogether.
2.1, whole screen increases measuring point: left several the 10th screens, the 44th screen and 54 screen, totally 40 points.
Table 4: left several the 10th screens.
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Numbering | 10-1 | 10-2 | 10-3 | 10-4 | 10-5 | 10-6 | 10-7 | 10-8 |
| Pipeloop (counting outward) | 9 | 10 | 11 | 12 | 13 | 14 | 15 | ? |
| Numbering | 10-9 | 10-10 | 10-11 | 10-12 | 10-13 | 10-14 | 10-15 | ? |
Table 5: left several the 44th screens.
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Numbering | Fill | Fill | 44-3 | 44-4 | 44-5 | Fill | 44-7 | 44-8 |
| Pipeloop (counting outward) | 9 | 10 | 11 | 12 | 13 | 14 | 15 | ? |
| Numbering | 44-9 | Fill | 44-11 | 44-12 | 44-13 | 44-14 | Fill | ? |
Table 6: left several the 54th screens.
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Numbering | 54-1 | 54-2 | 54-3 | 54-4 | 54-5 | 54-6 | 54-7 | 54-8 |
| Pipeloop (counting outward) | 9 | 10 | 11 | 12 | 13 | 14 | 15 | ? |
| Numbering | 54-9 | 54-10 | 54-11 | 54-12 | 54-13 | 54-14 | 54-15 | ? |
2.2, furnace chamber width: even numbers screen (2,4,6,8 ... 54,56) the 7th pipe, totally 25 points.
2.3, the 4th, 5,6,7,8,9,10,11 pipes of foreign matter pipe row 25-32 screen, totally 60 points are easily accumulated in header middle part.
3, final reheater increases by 65 wall temperature measuring points altogether.
3.1, whole screen increases measuring point: left several 12 screens, 52 screens, 64 screen, totally 33 points.
Table 7: left several the 16th screens.
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Numbering | 12-1 | 12-2 | 12-3 | 12-4 | 12-5 | 12-6 | 12-7 | 12-8 | 12-9 | 12-10 | 12-11 |
Table 8: left several the 52nd screens.
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Numbering | 52-1 | 52-2 | 52-3 | 52-4 | 52-5 | 52-6 | 52-7 | 52-8 | 52-9 | 52-10 | 52-11 |
Table 9: left several the 64th screens.
| Pipeloop (counting outward) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| Numbering | 64-1 | 64-2 | 64-3 | 64-4 | 64-5 | 64-6 | 64-7 | 64-8 | 64-9 | 64-10 | 64-11 |
3.2, furnace chamber width: even numbers screen (2,4,6,8 ... 70) the 6th pipe (18 screens, 52 screens, 68 screens the 6th are eradicated outer), totally 32 points.
By the wall temperature measuring point increasing, monitor that the pipe wall temperature of boiler heating surface changes, according to heating surface tube wall temperature, adjust the principle of main reheated steam temperature, carry out burning optimization adjustment, effectively controlled tube on high-temperature heating surface overtemperatute.
The present invention can increase installation wall temperature measuring point in the optimization of 600MW level super (super-) critical boiler high temperature heating surface tube and promote the use of.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Those skilled in the art, read after foregoing, for multiple modification of the present invention with to substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (2)
1. a super (super-) critical boiler high temperature heating surface tube wall temperature measuring point optimization method, is characterized in that, this optimization method comprises following steps:
Step 1, high-temperature surface is carried out to temperature analysis contrast furnace chamber width and whole screen pipe row, determine the tube wall temperature distribution trend of high-temperature surface;
High-temperature surface is arranged to the result of carrying out temperature analysis contrast in furnace chamber width and whole screen pipe: the 1st root canal wall temperature of shielding afterwards superheater, finishing superheater and final reheater is not the pipe of maximum temperature, heating surface tube wall temperature is monitored to there is no referential;
The tube wall temperature measuring point of step 2, increase high-temperature surface.
2. super (super-) critical boiler high temperature heating surface tube wall temperature measuring point optimization method as claimed in claim 1, is characterized in that, described step 1 comprises following steps:
Step 1.1, high-temperature surface is carried out to temperature analysis contrast in furnace chamber width;
Temperature analysis comparing result: the left side high temperature dot that shields afterwards superheater shields at the 5th comb, and right side high temperature dot shields at the 34th comb; The left side high temperature dot of finishing superheater shields at the 10th comb, and right side high temperature dot shields at the 54th comb; The left side high temperature dot of final reheater shields at the 12nd comb, and right side high temperature dot shields at the 64th comb;
Step 1.2, high-temperature surface is carried out to temperature analysis contrast whole screen pipe row;
Temperature analysis comparing result: shield afterwards the high temperature dot of superheater at the 6th, 14 pipes; The high temperature dot of finishing superheater is at the 6th pipe; The high temperature dot of final reheater is at the 5th, 8 pipes;
Super (super-) critical boiler high temperature heating surface tube wall temperature measuring point optimization method as claimed in claim 1, is characterized in that, described step 2 comprises following steps:
Step 2.1, on the left right side of the burner hearth of rear screen superheater, finishing superheater and final reheater, select respectively pipe that wall temperature is higher to arrange whole screen to increase wall temperature measuring point is installed;
Step 2.2, in the furnace chamber width of rear screen superheater, finishing superheater and final reheater, according to the tube panel quantity pipe that wall temperature is higher in the middle of comb screen, increase wall temperature measuring point is installed;
Step 2.3, at the middle part of the double-entry header of rear screen superheater and finishing superheater, easily accumulate pipe in the tube panel of foreign matter and increase wall temperature measuring point is installed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105202520A (en) * | 2015-10-28 | 2015-12-30 | 中国神华能源股份有限公司 | Boiler wall temperature control device and method |
| CN106594701A (en) * | 2016-10-12 | 2017-04-26 | 中电投电力工程有限公司 | Boiler temperature monitoring and measuring point arrangement method |
| CN110848731A (en) * | 2019-11-21 | 2020-02-28 | 华能罗源发电有限责任公司 | Ultra-supercritical tower boiler high-temperature heating surface pipe wall temperature measuring system |
| CN113883492A (en) * | 2021-09-06 | 2022-01-04 | 河北国华沧东发电有限责任公司 | Boiler steam temperature control method and electronic equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105202520A (en) * | 2015-10-28 | 2015-12-30 | 中国神华能源股份有限公司 | Boiler wall temperature control device and method |
| CN106594701A (en) * | 2016-10-12 | 2017-04-26 | 中电投电力工程有限公司 | Boiler temperature monitoring and measuring point arrangement method |
| CN110848731A (en) * | 2019-11-21 | 2020-02-28 | 华能罗源发电有限责任公司 | Ultra-supercritical tower boiler high-temperature heating surface pipe wall temperature measuring system |
| CN113883492A (en) * | 2021-09-06 | 2022-01-04 | 河北国华沧东发电有限责任公司 | Boiler steam temperature control method and electronic equipment |
| CN113883492B (en) * | 2021-09-06 | 2024-02-09 | 国能河北沧东发电有限责任公司 | Boiler steam temperature control method and electronic equipment |
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