CN203836943U - Low-temperature coal economizer of 300MW circulating fluidized bed boiler - Google Patents
Low-temperature coal economizer of 300MW circulating fluidized bed boiler Download PDFInfo
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- CN203836943U CN203836943U CN201420234897.XU CN201420234897U CN203836943U CN 203836943 U CN203836943 U CN 203836943U CN 201420234897 U CN201420234897 U CN 201420234897U CN 203836943 U CN203836943 U CN 203836943U
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Abstract
The utility model discloses a low-temperature coal economizer of a 300MW circulating fluidized bed boiler. The low-temperature coal economizer is installed in an ascending flue channel between a bag-type deduster and an air preheater of the 300MW circulating fluidized bed boiler, and left and right sides are symmetrical; partial condensed water at an outlet of a slag cooler of the circulating fluidized bed boiler enters an inlet header by an inlet pipe of the low-temperature coal economizer, and flows to an outlet header along a snake-shaped pipe of the low-temperature coal economizer from top to bottom in two ways, and is joined with another part of condensed water which is not heated up by the low-temperature coal economizer by an outlet pipe of the coal economizer. An abrasion-proof tile is arranged at an elbow of a heated surface to play a role in protecting the elbow; a flow guide plate is arranged at the turning point of a flue channel for enabling particle concentration in the flue gas to be uniform and reducing the partial abrasion of the heated surface; a long straight-section flue channel is preserved on the heated surface on which the low-temperature coal economizer is installed, so that the rectification of the flue gas flow field is facilitated and the abrasion nonuniformity of the heated surface is alleviated; nickel-based seepage layer brazed helical fin tubes are adopted for the low-temperature coal economizer, so that the hardness and the abrasion resistance of the heated surface are improved.
Description
Technical field
The utility model relates to a kind of economizer, relates in particular to a kind of 300MW CFBB low-level (stack-gas) economizer.
Background technology
Technology of Circulating Fluidized Bed Boiler is the high-efficiency low-pollution clean burning technology developing rapidly in recent ten years.This technology has obtained business application widely in fields such as station boiler, Industrial Boiler and offal treatment utilizations in the world, and to jumbo CFBB development; Domestic research in this respect, development and application are also risen gradually, among existing up to a hundred CFBBs put into operation or manufacturing.Following several years by an important period that is recirculating fluidized bed develop rapidly.
CFBB has the transformation of a lot of energy-conservation aspects, comprises and installs the heat pipe heat recovery boiler that fuel energy conservation equipment, energy saver of condensing gas boiler, condensing heat recovery boiler and boiler tail adopt additional.
Wherein low-level (stack-gas) economizer also belongs to the transformation of its energy-conservation aspect, and with respect to traditional low-level (stack-gas) economizer, after transformation, low-level (stack-gas) economizer should be reliable and be had higher economy: first, reduce as far as possible heating surface wear; Next, the low-level (stack-gas) economizer generation cold end corrosion of taking measures to reduce or prevent; Finally, before sack cleaner, more heating surface is arranged in the space of updraught flue, reduces amplitude, thereby improve economy to obtain larger flue-gas temperature.
Utility model content
The purpose of this utility model provides a kind of 300MW CFBB low-level (stack-gas) economizer with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
300MW CFBB low-level (stack-gas) economizer, low-level (stack-gas) economizer is arranged in the updraught flue between CFBB sack cleaner and air preheater, the left and right sides is arranged symmetrically with, comprise entrance header, low-level (stack-gas) economizer coiled pipe, outlet header, economizer inlet tube (1), economizer entrance Electrically operated gate (3), economizer exit pipe (5), economizer bypass flow meter (6), economizer bypass adjustment doors (7), No. 1 low-temperature heater entrance adjustment doors (16) and No. 2 low-temperature heater entrance adjustment doors (15), the part condensate water of the slag cooler outlet of 300MW CFBB enters entrance header through economizer inlet tube (1), along low-level (stack-gas) economizer coiled pipe, divide two-way to flow to outlet header from top to bottom, through economizer exit pipe (5) and another part, without the condensate water of low-level (stack-gas) economizer heating, collect.
Particularly, between economizer inlet tube (1) and entrance header, be provided with economizer entrance Electrically operated gate (3) and economizer entrance manually operated door (4), between one end of economizer exit pipe (5) and outlet header, be provided with economizer exit Electrically operated gate (13) and economizer exit manually operated door (14).
Further, the other end of economizer exit pipe (5) connects respectively the first end of the first end of economizer bypass flow meter (6), the first end of No. 2 low-temperature heater entrance adjustment doors (15) and No. 1 low-temperature heater entrance adjustment doors (16), the second end of economizer bypass flow meter (6) is connected with the first end of economizer bypass adjustment doors (7), and the second end of economizer bypass adjustment doors (7) is connected with the outlet of the slag cooler of CFBB.
Economizer bypass adjustment doors (7) is for regulating the water yield that enters low-level (stack-gas) economizer.
Further, entrance header comprises economizer left side entrance header (8) and economizer right side entrance header (9), outlet header comprises economizer left side outlet header (11) and economizer right side outlet header (12), and economizer coiled pipe comprises economizer left side coiled pipe (2) and economizer right side coiled pipe (10).
Further, economizer coiled pipe comprises nickel-based brazing spiral fin coil and low temperature resistant corrosion pipe.
Adopt nickel-based brazing spiral fin coil, its thermal contact resistance is 0, and have corrosion-resistant, anti abrasive feature; Adopt low temperature resistant corrosion tubing, be positioned at low-level (stack-gas) economizer water side low-temperature zone, this part tubing is mainly used in preventing the cold end corrosion causing when water temperature is too low.
Further, 4 H section steel beams of the low temperature heating surface integral hoisting of low-level (stack-gas) economizer, 2 H section steel beam welding of 4 H section steel beams and other perpendicular direction, form general frame structure, and frame structure is placed on the concrete beam of 15.5m absolute altitude.
Further, in the elbow of low-level (stack-gas) economizer heating surface, wearing-resistant tile is set, in the flue gas elbow of low-level (stack-gas) economizer, deflector is set, the front portion being heated at installation low-level (stack-gas) economizer is provided with compared with long and straight section flue.
Further, low-level (stack-gas) economizer heating surface is nickel-base seeping layer soldering spiral fin coil, and nickel-base seeping layer soldering helical fin tube-surface adopts and oozes nickel, chromium and phosphorus alloy material.
Wearing-resistant tile is arranged in elbow at heating surface, plays the effect of protection elbow; In flue gas elbow, deflector is set, evenly the granule density in flue gas, reduces the concentrated wear of heating surface; In the front portion of low-level (stack-gas) economizer heating surface, leave longer straight section flue, be conducive to the rectification of flue gas flow field, reduce heating surface wear inhomogeneities; Low-level (stack-gas) economizer heating surface adopts nickel-base seeping layer soldering spiral fin coil, and this tube-surface adopts and oozes nickel, chromium and phosphorus alloy material, has improved heating surface hardness and wearability.
Further, the water side low-temperature zone of low-level (stack-gas) economizer is selected low temperature resistant corrosion steel.The high temperature section heat exchanger tube of low-level (stack-gas) economizer heating surface adopts nickel chromium triangle infiltration layer zero gap resistance soldering spiral fin coil.
When CFBB abnormal running, wall temperature of heated surface may be lower than acid dew point, so the water side low-temperature zone of low-level (stack-gas) economizer is selected low temperature resistant corrosion steel; The high temperature section heat exchanger tube of low-level (stack-gas) economizer heating surface adopts nickel chromium triangle infiltration layer zero gap resistance soldering spiral fin coil, and it has good anti-low-temperature corrosion performance.
The beneficial effects of the utility model are:
The utility model provides a kind of 300MW CFBB low-level (stack-gas) economizer, in the elbow of heating surface, arranges wearing-resistant tile, plays the effect of protection elbow; At flue turning, deflector is set, evenly the granule density in flue gas, reduces the concentrated wear of heating surface; In the front portion of low-level (stack-gas) economizer heating surface, leave longer straight section flue, be conducive to the rectification of flue gas flow field, reduce heating surface wear inhomogeneities; Low-level (stack-gas) economizer heating surface adopts nickel-base seeping layer soldering spiral fin coil, and this tube-surface adopts and oozes nickel, chromium and phosphorus alloy material, has improved tube surface hardness and wearability; When CFBB abnormal running, wall temperature of heated surface may be lower than acid dew point, so the water side low-temperature zone of low-level (stack-gas) economizer is selected low temperature resistant corrosion steel; The high temperature section heat exchanger tube of low-level (stack-gas) economizer heating surface adopts nickel chromium triangle infiltration layer zero gap resistance soldering spiral fin coil, and it has good anti-low-temperature corrosion performance.
Accompanying drawing explanation
Fig. 1 is the pipe-line system figure of the utility model 300MW CFBB low-level (stack-gas) economizer;
In figure: economizer inlet tube (1), economizer left side coiled pipe (2), economizer entrance Electrically operated gate (3), economizer entrance manually operated door (4), economizer exit pipe (5), economizer bypass flow meter (6), economizer bypass adjustment doors (7), economizer left side entrance header (8), economizer right side entrance header (9), economizer right side coiled pipe (10), economizer left side outlet header (11), economizer right side outlet header (12), economizer exit Electrically operated gate (13), economizer exit manually operated door (14), No. 1 low-temperature heater entrance adjustment doors (16) and No. 2 low-temperature heater entrance adjustment doors (15).
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, 300MW CFBB low-level (stack-gas) economizer, low-level (stack-gas) economizer is arranged in the updraught flue between CFBB sack cleaner and air preheater, and the left and right sides is arranged symmetrically with, comprise by entrance header, economizer coiled pipe, outlet header, economizer inlet tube (1), economizer entrance Electrically operated gate (3), , economizer exit pipe (5), economizer bypass flow meter (6), economizer bypass adjustment doors (7), No. 1 low-temperature heater entrance adjustment doors (16) and No. 2 low-temperature heater entrance adjustment doors (15), the partial condensation water of the slag cooler outlet of CFBB enters entrance header through economizer inlet tube (1), along economizer coiled pipe, divide two-way to flow to outlet header from top to bottom, through economizer exit pipe (5) and another part, without the condensate water of low-level (stack-gas) economizer heating, collect, flue gas in low-level (stack-gas) economizer flue from below to up laterally adverse current wash away low-level (stack-gas) economizer tube bank.Between economizer inlet tube (1) and entrance header, be provided with economizer entrance manually operated door (4), between one end of economizer exit pipe (5) and outlet header, be provided with economizer exit Electrically operated gate (13) and economizer exit manually operated door (14).The other end of economizer exit pipe (5) connects respectively the first end of the first end of economizer bypass flow meter (6), the first end of No. 2 low-temperature heater entrance adjustment doors (15) and No. 1 low-temperature heater entrance adjustment doors (16), the second end of economizer bypass flow meter (6) is connected with the first end of economizer bypass adjustment doors (7), and the second end of economizer bypass adjustment doors (7) is connected with the outlet of the slag cooler of CFBB.
Entrance header comprises economizer left side entrance header (8) and economizer right side entrance header (9), outlet header comprises economizer left side outlet header (11) and economizer right side outlet header (12), and economizer coiled pipe comprises economizer left side coiled pipe (2) and economizer right side coiled pipe (10).Economizer coiled pipe comprises nickel-based brazing spiral fin coil and low temperature resistant corrosion pipe.Adopt nickel-based brazing spiral fin coil, its thermal contact resistance is 0, and have corrosion-resistant, anti abrasive feature; Adopt low temperature resistant corrosion tubing, be positioned at low-level (stack-gas) economizer water side low-temperature zone, this part tubing is mainly used in preventing the cold end corrosion causing when water temperature is too low.
4 H section steel beams of low temperature heating surface integral hoisting of low-level (stack-gas) economizer, 2 H section steel beam welding of 4 H section steel beams and other perpendicular direction, form general frame structure, and frame structure is placed on the concrete beam of 15.5m absolute altitude.Low-level (stack-gas) economizer arranges wearing-resistant tile in the elbow of heating surface, at flue turning, deflector is set, and in the front portion that low-level (stack-gas) economizer heating surface is installed, is provided with longer straight section flue.Low-level (stack-gas) economizer heating surface is nickel-base seeping layer soldering spiral fin coil, and nickel-base seeping layer soldering helical fin tube-surface adopts and oozes nickel, chromium and phosphorus alloy material.The water side low-temperature zone of low-level (stack-gas) economizer is selected low temperature resistant corrosion steel.The high temperature section heat exchanger tube of low-level (stack-gas) economizer heating surface adopts nickel chromium triangle infiltration layer zero gap resistance soldering spiral fin coil.
Low-level (stack-gas) economizer ruuning situation shows, boiler at full capacity down smoke-discharging temperature has declined more than 34 ℃.Increase low-level (stack-gas) economizer, avoided CFBB too high because of exhaust gas temperature, and be forced to reduce the method for operation that unit load is protected cloth bag.In addition, according to equivalent enthalpy drop method, can calculate that under unit rated load, can to save mark coal consumption be 3.17g/kWh, unit year hours run according to 5000 hours, save every year 2100 tons of coal amounts.According to mark coal per ton, according to 700 yuan of calculating, the income of bringing is every year more than 140 ten thousand yuan, and whole utility model construction investment payback period is 4 years.
The technical solution of the utility model is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion of making according to the technical solution of the utility model, within all falling into protection domain of the present utility model.
Claims (9)
1.300MW CFBB low-level (stack-gas) economizer, low-level (stack-gas) economizer is arranged in the updraught flue between CFBB sack cleaner and air preheater, and the left and right sides is arranged symmetrically with, it is characterized in that: comprise by entrance header, low-level (stack-gas) economizer coiled pipe, outlet header, economizer inlet tube (1), economizer entrance Electrically operated gate (3), economizer exit pipe (13), low-level (stack-gas) economizer bypass flow meter (6), economizer bypass adjustment doors (7), No. 1 low-temperature heater entrance adjustment doors (16) and No. 2 low-temperature heater entrance adjustment doors (15), the part condensate water of the slag cooler outlet of 300MW CFBB enters entrance header through low-level (stack-gas) economizer inlet tube (1), along low-level (stack-gas) economizer coiled pipe, divide two-way to flow to outlet header from top to bottom, through low-level (stack-gas) economizer outlet (5) and another part, without the condensate water of low-level (stack-gas) economizer heating, collect.
2. according to the 300MW CFBB low-level (stack-gas) economizer of claim 1, it is characterized in that: between economizer inlet tube (1) and entrance header, be provided with economizer entrance Electrically operated gate (3) and economizer entrance manually operated door (4), between one end of economizer exit pipe (5) and outlet header, be provided with economizer exit Electrically operated gate (13) and economizer exit manually operated door (14).
3. according to the 300MW CFBB low-level (stack-gas) economizer of claim 2, it is characterized in that: the other end of economizer exit pipe (5) connects respectively the first end of the first end of economizer bypass flow meter (6), the first end of No. 2 low-temperature heater entrance adjustment doors (15) and No. 1 low-temperature heater entrance adjustment doors (16), the second end of economizer bypass flow meter (6) is connected with the first end of economizer bypass adjustment doors (7), and the second end of economizer bypass adjustment doors (7) is connected with the outlet of the slag cooler of CFBB.
4. according to the 300MW CFBB low-level (stack-gas) economizer design of claim 1, it is characterized in that: entrance header comprises economizer left side entrance header (8) and economizer right side entrance header (9), outlet header comprises economizer left side outlet header (11) and economizer right side outlet header (12), and economizer coiled pipe comprises economizer left side coiled pipe (2) and economizer right side coiled pipe (10).
5. according to the 300MW CFBB low-level (stack-gas) economizer design of claim 4, it is characterized in that: economizer coiled pipe comprises nickel-based brazing spiral fin coil and low temperature resistant corrosion pipe.
6. according to the 300MW CFBB low-level (stack-gas) economizer design of claim 1, it is characterized in that: 4 H section steel beams of low temperature heating surface integral hoisting of low-level (stack-gas) economizer, 2 H section steel beam welding of 4 H section steel beams and other perpendicular direction, form general frame structure, frame structure is placed on the concrete beam of 15.5m absolute altitude.
7. according to the 300MW CFBB low-level (stack-gas) economizer design of claim 1, it is characterized in that: the elbow at low-level (stack-gas) economizer heating surface arranges wearing-resistant tile, flue turning at low-level (stack-gas) economizer arranges deflector, and the face being heated at installation low-level (stack-gas) economizer is provided with longer straight section flue.
8. according to the 300MW CFBB low-level (stack-gas) economizer design of claim 7, it is characterized in that: low-level (stack-gas) economizer heating surface is nickel-base seeping layer soldering spiral fin coil, nickel-base seeping layer soldering helical fin tube-surface adopts and oozes nickel, chromium and phosphorus alloy material.
9. according to the 300MW CFBB low-level (stack-gas) economizer design of claim 1, it is characterized in that: the water side low-temperature zone of low-level (stack-gas) economizer is selected low temperature resistant corrosion steel, the high temperature section heat exchanger tube of low-level (stack-gas) economizer heating surface adopts nickel chromium triangle infiltration layer zero gap resistance soldering spiral fin coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420234897.XU CN203836943U (en) | 2014-05-09 | 2014-05-09 | Low-temperature coal economizer of 300MW circulating fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420234897.XU CN203836943U (en) | 2014-05-09 | 2014-05-09 | Low-temperature coal economizer of 300MW circulating fluidized bed boiler |
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| CN203836943U true CN203836943U (en) | 2014-09-17 |
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| CN201420234897.XU Expired - Fee Related CN203836943U (en) | 2014-05-09 | 2014-05-09 | Low-temperature coal economizer of 300MW circulating fluidized bed boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613458A (en) * | 2015-01-26 | 2015-05-13 | 李保军 | Heat energy comprehensive utilization device of heat-power system with steam boiler |
| CN104848197A (en) * | 2015-03-31 | 2015-08-19 | 浙江华德利纺织印染有限公司 | Device for recycling boiler tail smoke heat |
| CN105157009A (en) * | 2015-06-24 | 2015-12-16 | 江苏海德节能科技有限公司 | Abrasion-proof device of low-temperature economizer |
-
2014
- 2014-05-09 CN CN201420234897.XU patent/CN203836943U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613458A (en) * | 2015-01-26 | 2015-05-13 | 李保军 | Heat energy comprehensive utilization device of heat-power system with steam boiler |
| CN104848197A (en) * | 2015-03-31 | 2015-08-19 | 浙江华德利纺织印染有限公司 | Device for recycling boiler tail smoke heat |
| CN105157009A (en) * | 2015-06-24 | 2015-12-16 | 江苏海德节能科技有限公司 | Abrasion-proof device of low-temperature economizer |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20150509 |
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| EXPY | Termination of patent right or utility model |