CN103438474A - Partial-exhaust-gas-participated hot-air powder conveying comprehensive utilization system of boiler pulverizing system - Google Patents
Partial-exhaust-gas-participated hot-air powder conveying comprehensive utilization system of boiler pulverizing system Download PDFInfo
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- CN103438474A CN103438474A CN2013104147778A CN201310414777A CN103438474A CN 103438474 A CN103438474 A CN 103438474A CN 2013104147778 A CN2013104147778 A CN 2013104147778A CN 201310414777 A CN201310414777 A CN 201310414777A CN 103438474 A CN103438474 A CN 103438474A
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Abstract
The invention relates to a comprehensive utilization system and particularly relates to a partial-exhaust-gas-participated hot-air powder conveying comprehensive utilization system of a boiler pulverizing system. The partial-exhaust-gas-participated hot-air powder conveying comprehensive utilization system is used for solving the problem of intermediate storage pulverizing systems that the moisture content of coal is relatively high after coal slurry is blended in a high proportion. The partial-exhaust-gas-participated hot-air powder conveying comprehensive utilization system comprises a hot air pipe, a coal powder mixer, a primary air pipe, a wear-resistant ceramic pipe, a header, a communication pipe of recirculation and header and a recirculation pipe, wherein the hot air pipe is connected with an air inlet of the coal powder mixer, an air outlet of the coal powder mixer is connected with the primary air pipe, the hot air pipe is connected with the header through the wear-resistant ceramic pipe, and the header is connected with the recirculation pipe through the communication pipe of recirculation and header. The partial-exhaust-gas-participated hot-air powder conveying comprehensive utilization system of the boiler pulverizing system is applied to the field of boiler pulverizing.
Description
Technical field
The present invention relates to a kind of utilization system, be specifically related to the weary gas of a kind of boiler milling system part and participate in the pulverized coal carried by hot air utilization system.
Background technology
Existing intermediate storage-type pulverized coal preparation system is only suitable for the coal that bituminous coal and ature of coal total moisture are 5.2%, and while for the ature of coal total moisture, arriving 12%, drying capacity of pulverizer and ventilation are exerted oneself and the wretched insufficiency phenomenon occurred; And existing pulverized coal preparation system tertiary air is pressed higher, cause tertiary air speed to strengthen, tertiary-air pipe wearing and tearing aggravation, the high speed tertiary air will cause the furnace flame center to move down, the impact burning.
Summary of the invention
The present invention is after solving intermediate storage-type pulverized coal preparation system blending coal slime at high proportion, the problem that ature of coal moisture is higher, and then the weary gas participation of boiler milling system part pulverized coal carried by hot air utilization system is proposed.
The present invention addresses the above problem the technical scheme of taking to be: the liaison tube and the recirculation pipe that the present invention includes warm-air pipe, coal, pulverulent fuel mixer, airduct, wear resistance ceramic tube, header, recirculation and a header, warm-air pipe is connected with the coal, pulverulent fuel mixer air inlet, the air outlet of coal, pulverulent fuel mixer is connected with an airduct, warm-air pipe is connected with header by wear resistance ceramic tube, and header is connected with recirculation pipe with the liaison tube of header by recirculation.
The invention has the beneficial effects as follows: the present invention has increased wind band powder amount one time, and flame kernel improves, overheavy firing, reduce the furnace outlet oxygen content, reduced chemistry and the imperfect combustion heat loss of machinery, reduce unburned carbon in flue dust, reduce heating surface wear, reduce the blower fan power consumption, improve boiler efficiency; The present invention reduces the powder process tertiary air and presses, and reduces the wearing and tearing of tertiary-air pipe and recirculating line, improves the mill exhauster operating condition, improve the coal pulverizer inlet negative pressure, increase the input of dry-heat air, avoided regulating desiccant temperature with cold wind, powder process is leaked out few, improves Mill output; The present invention is owing to having strengthened burning, furnace outlet gas temperature is greatly improved, water-cooling wall, front screen, rear screen, finishing superheater, reheater caloric receptivity increase, main reheater temperature is improved, simultaneously because evaporation capacity improves, the tube wall of front and back screens finishing superheater is obtained cooling, reduce the generation of overtemperature of tube wall; Due to the raising of steam initial temperature, steam efficiency is improved, reduce the corrosion to last stage vane of steam turbine.
The accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, the weary gas of the described boiler milling system part of present embodiment participates in liaison tube 7 and the recirculation pipe 9 that the pulverized coal carried by hot air utilization system comprises warm-air pipe 1, coal, pulverulent fuel mixer 2, airduct 3, wear resistance ceramic tube 4, header 6, recirculation and a header, warm-air pipe 1 is connected with coal, pulverulent fuel mixer 2 air inlets, the air outlet of coal, pulverulent fuel mixer 2 is connected with an airduct 3, warm-air pipe 1 is connected with header 6 by wear resistance ceramic tube 4, and header 6 is connected with recirculation pipe 9 with the liaison tube 7 of header by recirculation.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, the weary gas of the described boiler milling system part of present embodiment participates in the pulverized coal carried by hot air utilization system and also comprises the first Circular ventilation door 5 and the second Circular ventilation door 8, the first Circular ventilation door 5 is arranged on wear resistance ceramic tube 4, and the second Circular ventilation door 8 is arranged on the liaison tube 7 of recirculation and header.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: present embodiment is described in conjunction with Fig. 1, the diameter that the weary gas of the described boiler milling system part of present embodiment participates in the warm-air pipe 1 of pulverized coal carried by hot air utilization system is 480mm, the thickness of pipe wall of warm-air pipe 1 is 3mm, the diameter of an airduct 3 is 450mm, the thickness of pipe wall of an airduct 3 is 10mm, and the diameter of wear resistance ceramic tube 4 is 325mm, and the thickness of pipe wall of wear resistance ceramic tube 4 is 8mm, the diameter of recirculation pipe 9 is 720mm, and the thickness of pipe wall of recirculation pipe 9 is 5mm.Other composition and annexation are identical with the specific embodiment one.
Claims (3)
1. the weary gas of boiler milling system part participates in the pulverized coal carried by hot air utilization system, it is characterized in that: the weary gas of described boiler milling system part participates in the pulverized coal carried by hot air utilization system and comprises warm-air pipe (1), coal, pulverulent fuel mixer (2), an airduct (3), wear resistance ceramic tube (4), header (6), liaison tube (7) and the recirculation pipe (9) of recirculation and header, warm-air pipe (1) is connected with coal, pulverulent fuel mixer (2) air inlet, the air outlet of coal, pulverulent fuel mixer (2) is connected with an airduct (3), warm-air pipe (1) is connected with header (6) by wear resistance ceramic tube (4), header (6) is connected with recirculation pipe (9) with the liaison tube (7) of header by recirculation.
2. the weary gas of boiler milling system part participates in the pulverized coal carried by hot air utilization system according to claim 1, it is characterized in that: described system also comprises the first Circular ventilation door (5) and the second Circular ventilation door (8), it is upper that the first Circular ventilation door (5) is arranged on wear resistance ceramic tube (4), and the second Circular ventilation door (8) is arranged on the liaison tube (7) of recirculation and header.
3. the weary gas of boiler milling system part participates in the pulverized coal carried by hot air utilization system according to claim 1, it is characterized in that: the diameter of warm-air pipe (1) is 480mm, the thickness of pipe wall of warm-air pipe (1) is 3mm, the diameter of an airduct (3) is 450mm, the thickness of pipe wall of an airduct (3) is 10mm, and the diameter of wear resistance ceramic tube (4) is 325mm, and the thickness of pipe wall of wear resistance ceramic tube (4) is 8mm, the diameter of recirculation pipe (9) is 720mm, and the thickness of pipe wall of recirculation pipe (9) is 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310414777.8A CN103438474B (en) | 2013-09-12 | 2013-09-12 | The weary gas of boiler milling system part participates in pulverized coal carried by hot air utilization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310414777.8A CN103438474B (en) | 2013-09-12 | 2013-09-12 | The weary gas of boiler milling system part participates in pulverized coal carried by hot air utilization system |
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| CN103438474A true CN103438474A (en) | 2013-12-11 |
| CN103438474B CN103438474B (en) | 2016-01-20 |
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| CN201310414777.8A Active CN103438474B (en) | 2013-09-12 | 2013-09-12 | The weary gas of boiler milling system part participates in pulverized coal carried by hot air utilization system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556026A (en) * | 2015-09-30 | 2017-04-05 | 邸生才 | Air delivery pipe coal dust weight measurement instrument and multiple pipelines are balanced for powder control system |
| CN111748395A (en) * | 2020-07-02 | 2020-10-09 | 煤科院节能技术有限公司 | Method for preparing coal powder by using coal slime |
| CN113154433A (en) * | 2021-05-28 | 2021-07-23 | 西安热工研究院有限公司 | Power station boiler negative pressure cooperative control method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0327914A2 (en) * | 1988-02-08 | 1989-08-16 | General Signal Corporation | Calorimetry system |
| CN101596980A (en) * | 2009-06-24 | 2009-12-09 | 哈尔滨工业大学 | Hot blast and exhaust gas double-medium powder delivery method and weary gas and hot air mixer |
| CN201589289U (en) * | 2010-02-05 | 2010-09-22 | 哈尔滨工业大学 | Exhaust gas and hot air double-medium powder delivery system |
-
2013
- 2013-09-12 CN CN201310414777.8A patent/CN103438474B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0327914A2 (en) * | 1988-02-08 | 1989-08-16 | General Signal Corporation | Calorimetry system |
| CN101596980A (en) * | 2009-06-24 | 2009-12-09 | 哈尔滨工业大学 | Hot blast and exhaust gas double-medium powder delivery method and weary gas and hot air mixer |
| CN201589289U (en) * | 2010-02-05 | 2010-09-22 | 哈尔滨工业大学 | Exhaust gas and hot air double-medium powder delivery system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556026A (en) * | 2015-09-30 | 2017-04-05 | 邸生才 | Air delivery pipe coal dust weight measurement instrument and multiple pipelines are balanced for powder control system |
| CN106556026B (en) * | 2015-09-30 | 2019-10-11 | 邸生才 | Air delivery pipe coal dust weight measurement instrument and multiple pipeline equilibrium powder supply control systems |
| CN111748395A (en) * | 2020-07-02 | 2020-10-09 | 煤科院节能技术有限公司 | Method for preparing coal powder by using coal slime |
| CN113154433A (en) * | 2021-05-28 | 2021-07-23 | 西安热工研究院有限公司 | Power station boiler negative pressure cooperative control method and system |
| CN113154433B (en) * | 2021-05-28 | 2023-02-21 | 西安热工研究院有限公司 | Power station boiler negative pressure cooperative control method and system |
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| CN103438474B (en) | 2016-01-20 |
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