CN209857017U - Boiler device of waste heat power generation system suitable for blast furnace slag sensible heat recovery - Google Patents
Boiler device of waste heat power generation system suitable for blast furnace slag sensible heat recovery Download PDFInfo
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- CN209857017U CN209857017U CN201821815099.0U CN201821815099U CN209857017U CN 209857017 U CN209857017 U CN 209857017U CN 201821815099 U CN201821815099 U CN 201821815099U CN 209857017 U CN209857017 U CN 209857017U
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Abstract
The utility model relates to a boiler plant of waste heat power generation system suitable for blast furnace slag sensible heat recovery belongs to the energy recovery utilization field among the steel industry. The utility model discloses a boiler top is the flue gas wind export, and the boiler bottom is the flue gas wind import, and the inside from the top down of boiler divide into low pressure unit and high temperature unit in proper order, and low pressure unit from the top down includes public economizer, low pressure evaporimeter, low pressure over heater in proper order, and the low pressure unit is connected with the low pressure steam pocket, and high temperature unit from the top down includes high temperature economizer, high temperature evaporimeter, high temperature over heater in proper order, and the high temperature unit is connected with the high temperature steam pocket. The utility model provides a boiler adopts lower air inlet integral type deposit room structure, has the characteristics of simplifying the cigarette wind pipeline, reducing area, saving investment.
Description
Technical Field
The utility model relates to a boiler device and a method of a waste heat power generation system suitable for sensible heat recovery of blast furnace slag, which belong to the field of energy recovery in the iron and steel industry.
Background
Blast furnace slag waste heat recovery is an important way for energy conservation and emission reduction in the steel industry, and the boiler device is used as a main device of a blast furnace slag sensible heat recovery waste heat power generation system and directly influences the waste heat power generation efficiency. However, the waste heat boiler generally has the following disadvantages in practical aspects:
1. the waste heat boiler generally adopts a horizontal structure, and has large floor area and large land investment.
2. The vertical boiler has the characteristics of long smoke and air pipeline, complex structure, large heat dissipation loss and the like.
3. The heating surface of the boiler is used as an important structure of the boiler, and the heat transfer efficiency of the heating surface is influenced by serious dust accumulation and serious abrasion of the heating surface, so that the service efficiency of the boiler is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a boiler device of a waste heat power generation system suitable for sensible heat recovery of blast furnace slag, wherein a boiler adopts a vertical structure, a smoke and air outlet is arranged at the top of the boiler, a built-in settling chamber is arranged at the bottom of the boiler, and a smoke and air inlet is arranged at the upper part of the built-in settling chamber; a common economizer, a low-pressure evaporator, a low-pressure superheater, a high-temperature economizer, a high-temperature evaporator and a high-temperature superheater are sequentially arranged in the boiler from top to bottom. The utility model provides a boiler adopts lower air inlet integral type deposit room structure, has the characteristics of simplifying the cigarette wind pipeline, reducing area, saving investment.
The utility model adopts the technical scheme as follows:
the utility model provides a boiler plant suitable for waste heat power generation system of blast furnace slag sensible heat recovery, the boiler top is the flue gas export, and the boiler bottom is the flue gas import, and the inside from the top down of boiler is low pressure unit and high temperature unit respectively in proper order, low pressure unit from the top down includes public economizer, low pressure evaporation low pressure over heater, and low pressure unit is connected with the low pressure steam pocket, high temperature unit from the top down includes high temperature economizer, high temperature evaporimeter, high temperature over heater in proper order, and high temperature unit is connected with the high temperature steam pocket.
Furthermore, a settling chamber is arranged at the bottom of the boiler, a smoke and air inlet is formed in the settling chamber and comprises a high-temperature smoke and air inlet and a medium-temperature smoke and air inlet, a partition board is arranged in the settling chamber to divide the settling chamber into a high-temperature side and a medium-temperature side, and a high-temperature superheater is arranged above the high-temperature side settling chamber.
Furthermore, the low-pressure superheater and the high-temperature superheater are light tube type, the materials are temperature-resistant alloy steel, and other heating surfaces are spiral fin tube type; the heated surfaces are arranged in a counterflow staggered arrangement.
Furthermore, the tube bundles in the economizer, the evaporator and the superheater are supported by comb-shaped plates, and the tube bundles and the load of the working medium are borne by a cross beam arranged in the smoke box through the comb-shaped plates.
The utility model provides a waste heat power generation system's boiler plant suitable for blast furnace slag sensible heat recovery has following characteristics:
(1) the boiler adopts the integrated settling chamber, thereby simplifying smoke and air pipelines, reducing the occupied area and saving the investment;
(2) the heat dissipation of equipment and a smoke and air pipeline is reduced, the air inlet temperature of the boiler is increased by at least-20 ℃, the waste heat utilization efficiency is improved by about 1-2%;
(3) the boiler adopts an integrated settling chamber, smoke and air pipelines are reduced, and system resistance is reduced, wherein the system resistance is only about 800 Pa;
(4) the smoke and wind go from bottom to top, which is greatly beneficial to the wear resistance of the waste heat boiler; the abrasion is in direct proportion to the third power of the ash particle speed, the smoke wind moves from bottom to top, the smoke wind direction is opposite to the gravity descending direction of the ash particles, the gravity acceleration of the slag particles is prevented, and the abrasion degree of the heating surface of the boiler is far lower than that of the smoke wind moving from top to bottom in terms of the smoke wind abrasion mechanism.
Drawings
FIG. 1 is a diagram of a boiler plant of a cogeneration system suitable for sensible heat recovery from blast furnace slag;
the labels in the figure are: 1-smoke and air outlet; 2-high pressure steam drum; 3-sharing an economizer; 4-a low pressure evaporator; 5-low pressure superheater; 6-high temperature economizer; 7-high temperature evaporator; 8-high temperature superheater; 9-high temperature smoke wind inlet; 10-medium temperature smoke wind inlet; 11-a separator; 12-a low pressure drum; 13-water pump.
Detailed Description
The following further description is made in conjunction with the accompanying drawings and examples.
As shown in figure 1, the utility model relates to a boiler plant of cogeneration system suitable for blast furnace slag sensible heat recovery, the boiler is vertical structure, and the export of flue gas wind 1 sets up at the boiler top, its characterized in that, the boiler bottom is equipped with built-in settling chamber, and the upper portion of built-in settling chamber is equipped with the flue gas wind import. The upper part of the settling chamber is provided with a high-temperature smoke air inlet 9 and a medium-temperature smoke air inlet 10, a partition plate 11 is arranged in the settling chamber and is divided into a high-temperature side and a medium-temperature side through the partition plate 11, and the high-temperature superheater 8 is arranged in the high-temperature side settling chamber.
The internal heating surface of the boiler is sequentially provided with a common economizer 3, a low-pressure evaporator 4, a low-pressure superheater 5, a high-temperature economizer 6, a high-temperature evaporator 7 and a high-temperature superheater 8 from top to bottom. The boiler device is of a double-pressure type, and the boiler is also provided with a high-pressure steam drum 2 and a low-pressure steam drum 12. The superheater is in a light pipe type, other heating surfaces are in spiral fin pipe type, and the heating surfaces are arranged in a countercurrent staggered manner. The tube bundles in the economizer, the evaporator and the superheater are supported by comb-shaped plates, and the tube bundles and the load of the working medium are borne by a cross beam arranged in the smoke box through the comb-shaped plates.
The ash removal of the waste heat boiler is very important in a waste heat utilization system, and dust attached to a heat exchange surface can reduce the heat efficiency of the boiler, reduce the passing area of flue gas, increase the air velocity and increase the scouring wear of the boiler, so that the service life of the boiler is shortened. However, because the waste heat boiler for sensible heat recovery of blast furnace slag adopts the built-in settling chamber to pre-remove the dust in the flue gas, the large dust attached to the heat exchange surface is less, the cohesiveness is small, and the large dust can be basically taken away along with the air flow, so the boiler is not provided with a dust cleaning device.
The above description is only one embodiment of the present invention, and does not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (4)
1. The utility model provides a boiler plant suitable for waste heat power generation system of blast furnace slag sensible heat recovery, the boiler top is smoke and wind export (1), and the boiler bottom is smoke and wind import, its characterized in that, and the inside from the top down of boiler divide into low pressure unit and high temperature unit in proper order, low pressure unit from the top down includes public economizer (3), low pressure evaporimeter (4), low pressure over heater (5) in proper order, and the low pressure unit is connected with low pressure steam pocket (12), the high temperature unit from the top down includes high temperature economizer (6), high temperature evaporimeter (7), high temperature over heater (8) in proper order, and the high temperature unit is connected with high temperature steam pocket (2).
2. The boiler device of the cogeneration system suitable for sensible heat recovery of blast furnace slag according to claim 1, wherein the bottom of the boiler is provided with a settling chamber, the settling chamber is provided with a smoke inlet, the smoke inlet comprises a high-temperature smoke inlet (9) and a medium-temperature smoke inlet (10), the settling chamber is internally provided with a partition plate (11) for dividing the settling chamber into a high-temperature side and a medium-temperature side, and the high-temperature superheater (8) is arranged above the settling chamber at the high-temperature side.
3. The boiler device of the waste heat power generation system suitable for the sensible heat recovery of the blast furnace slag according to claim 1, wherein the low-pressure superheater (5) and the high-temperature superheater (8) are of a light pipe type, are made of temperature-resistant alloy steel, and are of a spiral fin pipe type on other heating surfaces; the heated surfaces are arranged in a counterflow staggered arrangement.
4. The boiler device of the cogeneration system suitable for sensible heat recovery of blast furnace slag according to claim 1, wherein the tube bundles in the economizer, the evaporator and the superheater are supported by a comb-shaped plate, and the tube bundles and the load of the working medium are borne by a beam arranged in the smoke box through the comb-shaped plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821815099.0U CN209857017U (en) | 2018-11-05 | 2018-11-05 | Boiler device of waste heat power generation system suitable for blast furnace slag sensible heat recovery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821815099.0U CN209857017U (en) | 2018-11-05 | 2018-11-05 | Boiler device of waste heat power generation system suitable for blast furnace slag sensible heat recovery |
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| CN209857017U true CN209857017U (en) | 2019-12-27 |
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| CN201821815099.0U Active CN209857017U (en) | 2018-11-05 | 2018-11-05 | Boiler device of waste heat power generation system suitable for blast furnace slag sensible heat recovery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297005A (en) * | 2018-11-05 | 2019-02-01 | 南京凯盛开能环保能源有限公司 | A kind of boiler plant and method of the afterheat generating system suitable for blast-furnace cement sensible heat recycling |
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2018
- 2018-11-05 CN CN201821815099.0U patent/CN209857017U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297005A (en) * | 2018-11-05 | 2019-02-01 | 南京凯盛开能环保能源有限公司 | A kind of boiler plant and method of the afterheat generating system suitable for blast-furnace cement sensible heat recycling |
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