CN202002139U - Pulverization drying capacity improving system for lignite coal combustion process of bituminous coal boiler - Google Patents
Pulverization drying capacity improving system for lignite coal combustion process of bituminous coal boiler Download PDFInfo
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- CN202002139U CN202002139U CN2011200440643U CN201120044064U CN202002139U CN 202002139 U CN202002139 U CN 202002139U CN 2011200440643 U CN2011200440643 U CN 2011200440643U CN 201120044064 U CN201120044064 U CN 201120044064U CN 202002139 U CN202002139 U CN 202002139U
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- primary air
- heat primary
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- air pipeline
- pipeline
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- 239000003077 lignite Substances 0.000 title claims abstract description 20
- 239000002802 bituminous coal Substances 0.000 title claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 15
- 238000001035 drying Methods 0.000 title claims abstract description 11
- 239000003245 coal Substances 0.000 title abstract description 18
- 238000010298 pulverizing process Methods 0.000 title abstract 3
- 230000001172 regenerating effect Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000007926 Craterellus fallax Nutrition 0.000 description 1
- 240000007175 Datura inoxia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
A pulverization drying capacity improving system for lignite coal combustion process of a bituminous coal boiler relates to a lignite coal combustion system of the bituminous coal boiler, and resolves the problems that the operation way of the existing lignite coal combustion system of the bituminous coal boiler, adopted by thermal power generation enterprises, is poor in operational economical efficiency and has potential safety hazards. A primary fan is communicated with a first section of a primary hot air pipeline through a primary cold air pipeline and a rotary air preheater, the first section of the primary hot air pipeline is communicated with a second section of the primary hot air pipeline through a connecting part, the second section of the primary hot air pipeline is communicated with a primary hot air main pipeline through a third section of the primary hot air pipeline, the primary hot air main pipeline is communicated with primary hot air branch pipelines, an outlet of a small oil gun is communicated with the second section of the primary hot air pipeline, and at least one thermocouple is arranged on each of the second section of the primary hot air pipeline and the third section of the primary hot air pipeline. The pulverization drying capacity improving system is used for the lignite coal combustion system of the bituminous coal boiler.
Description
Technical field
The utility model relates to a kind of bituminous coal fired boiler that uses and mixes the burning brown coal combustion system.
Background technology
Along with the variation of coal market, more and more enterprises can't obtain enough design coals in recent years, particularly at the brown coal reserves than zones such as China Meng Dong of horn of plenty, three provinces in the northeast of China, must replenish a large amount of brown coal.At present thermal power generation corporations adopt the existing bituminous coal fired boiler (employing unit pulverized-coal system) that uses to mix that the method for operation of burning brown coal exists great potential safety hazard (an airduct road in air oxygen content height) and performance driving economy is poor, mainly show: coal pulverizer outlet temperature substantial deviation design load, make the wind powder mixture temperature on the low side, influence catching fire of breeze airflow, and then reduced the furnace flame central temperature, cause the after-flame degree of coal dust in stove to reduce; Because the reduction of furnace flame central temperature has caused air preheater to export the reduction of heat primary air, secondary air temperature degree, make the stove combustion process present the trend of vicious circle simultaneously.In addition, because the calorific value of brown coal is generally lower, under the certain situation of unit output, boiler must increase fuel quantity, causes the wear problem of boiler heating surface outstanding, and vapor (steam) temperature is wayward.Based on this consideration, must carry out necessary transformation to boiler and pulverized coal preparation system (comprising heat primary air, hot secondary air system) thereof, to satisfy the needs that enterprise security is produced.Some thermal power generation corporations are located in extremely frigid zones simultaneously, are also undertaking the task to social heat supply during the winter operation, and whether the safety of boiler winter operation, is directly connected to regional resident's the safety of being heated.
The utility model content
The purpose of this utility model provides a kind of bituminous coal fired boiler that uses and mixes in the burning brown coal combustion process and to improve the powder process drying system of exerting oneself, and adopts and existingly uses bituminous coal fired boiler and mix the problem that the method for operation of burning brown coal exists great potential safety hazard and performance driving economy difference to solve thermal power generation corporations.
The utility model is to solve the problems of the technologies described above the technical scheme of taking to be: system of the present utility model comprises primary air fan, rotary regenerative air preheater, first section in heat primary air pipeline, heat primary air pipe outlet cut-off gate, old name for the Arabian countries in the Middle East's ground circle connector, second section in heat primary air pipeline, the female pipe of heat primary air, the 3rd section in heat primary air pipeline, a cold airduct road and Duo Gen heat primary air subtube; Described system also comprises tiny-oil ignition small oil gun and at least two thermocouples; The heat primary air pipeline is 90 ° of elbows for second section, the port of export of primary air fan is communicated with the arrival end in a cold airduct road, the port of export in a cold airduct road is communicated with a wind arrival end sealing of rotary regenerative air preheater, a wind port of export of rotary regenerative air preheater is communicated with the arrival end sealing of first section in heat primary air pipeline, the hot smoke outlet of air preheater inlet flue gas pipeline is communicated with the sealing of the smoke inlet end of rotary regenerative air preheater, the smoke outlet of rotary regenerative air preheater is communicated with the arrival end sealing of air preheater outlet flue, the port of export that the heat primary air pipeline is first section is communicated with the arrival end of second section in heat primary air pipeline by old name for the Arabian countries in the Middle East's ground circle connector, near the port of export place heat primary air pipe outlet cut-off gate is installed in first section in the heat primary air pipeline, the port of export that the heat primary air pipeline is second section is communicated with the arrival end of the 3rd section in heat primary air pipeline, the port of export that the heat primary air pipeline is the 3rd section is communicated with the arrival end of the female pipe of heat primary air, the female pipe of heat primary air is provided with a plurality of heat primary air outlets, a plurality of heat primary air outlets and the many corresponding one by one settings of heat primary air subtube on the female pipe of heat primary air, each heat primary air outlet on the female pipe of heat primary air is communicated with the arrival end of corresponding heat primary air subtube, on second section in the heat primary air pipeline tiny-oil ignition small oil gun is housed, the outlet of tiny-oil ignition small oil gun is communicated with for second section with the heat primary air pipeline, and second section in heat primary air pipeline is gone up and respectively is being respectively equipped with the thermocouple that at least one is used to measure the heat primary air temperature between the arrival end of second section in tiny-oil ignition small oil gun and heat primary air pipeline and on the 3rd section in the heat primary air pipeline.
The beneficial effects of the utility model are: boiler normal operation period (mixing the burning brown coal operating mode), this tiny-oil ignition small oil gun moves always, its combustion product must increase the content of inert gas composition in the heat primary air system, and the boiler milling system safety in operation will increase; Owing to increased the tiny-oil ignition oil gun in the heat primary air system, the heat that its burning produces has further improved the temperature of heat primary air, the enhancing of exerting oneself of pulverized coal preparation system drying.Therefore, will improve the coal pulverizer outlet temperature greatly and reduce coal pulverizer wind powder mixture moisture content, and make the boiler coal-ash ignition condition have greatly improved, thereby improved boiler combustion efficiency.In addition, the utility model also has simple in structure, and operation expense is cheap, and system is reliable, advantage that can long-time running.The utility model is particluarly suitable for former design and uses bituminous coal fired boiler and mix burning brown coal and carry out using in the system reform process, and the fuel cost expenditure that reduces thus can realize that improvement expenses reclaims and profit then, has improved the security of pulverized coal preparation system operation simultaneously.
Description of drawings
Fig. 1 is that (direction is the flow of flue gas direction to overall structure schematic diagram of the present utility model shown in the arrow in air preheater inlet flue gas pipeline 13 and the air preheater outlet flue 14; Direction is the heat primary air flow direction shown in the arrow in the 3rd section 10 in a cold airduct road 12, first section 3 in heat primary air pipeline, second section 6 in heat primary air pipeline and the heat primary air pipeline).
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 explanation, the system of present embodiment comprises primary air fan 1, rotary regenerative air preheater 2, first section 3 in heat primary air pipeline, heat primary air pipe outlet cut-off gate 4, old name for the Arabian countries in the Middle East's ground circle connector 5, second section 6 in heat primary air pipeline, the female pipe 8 of heat primary air, the 3rd section 10 in heat primary air pipeline, a cold airduct road 12 and Duo Gen heat primary air subtube 9; Described system also comprises tiny-oil ignition small oil gun 11 and at least two thermocouples 7; The heat primary air pipeline is 90 ° of elbows for second section 6, the port of export of primary air fan 1 is communicated with the arrival end in a cold airduct road 12, the port of export in a cold airduct road 12 is communicated with a wind arrival end sealing of rotary regenerative air preheater 2, the arrival end sealing that wind port of export of rotary regenerative air preheater 2 and heat primary air pipeline are first section 3 is communicated with, the hot smoke outlet of air preheater inlet flue gas pipeline 13 is communicated with the sealing of the smoke inlet end of rotary regenerative air preheater 2, the smoke outlet of rotary regenerative air preheater 2 is communicated with the arrival end sealing of air preheater outlet flue 14, the arrival end that round connector 5 of the port of export that the heat primary air pipeline is first section 3 and heat primary air pipeline are second section 6 with passing through old name for the Arabian countries in the Middle East is communicated with, first section 3 interior close port of export place of heat primary air pipeline is equipped with heat primary air pipe outlet cut-off gate 4, the arrival end that the port of export that the heat primary air pipeline is second section 6 and heat primary air pipeline are the 3rd section 10 is communicated with, the port of export that the heat primary air pipeline is the 3rd section 10 is communicated with the arrival end of the female pipe 8 of heat primary air, the female pipe 8 of heat primary air is provided with a plurality of heat primary air outlets, a plurality of heat primary air outlets and the many corresponding one by one settings of heat primary air subtube 9 on the female pipe 8 of heat primary air, each heat primary air outlet on the female pipe 8 of heat primary air is communicated with (during use with the arrival end of corresponding heat primary air subtube 9, the port of export of heat primary air subtube 9 is communicated with the heat primary air arrival end of coal pulverizer, the number of the heat primary air arrival end of coal pulverizer is identical with the number of heat primary air subtube 9), on second section 6 in the heat primary air pipeline tiny-oil ignition small oil gun 11 is housed, the outlet of tiny-oil ignition small oil gun 11 is communicated with for second section 6 with the heat primary air pipeline, respectively is being respectively equipped with the thermocouple 7 that at least one is used to measure the heat primary air temperature between the arrival end of second section 6 in tiny-oil ignition small oil gun 11 and heat primary air pipeline and on the 3rd section 10 in the heat primary air pipeline on second section 6 in the heat primary air pipeline.
The specific embodiment two: in conjunction with Fig. 1 explanation, the described heat primary air pipeline of present embodiment is second section in a heat resisting steel heat primary air pipeline for second section 6.
Heat resisting steel in the present embodiment is selected 304 heat resisting steel for use.
The specific embodiment three: in conjunction with Fig. 1 explanation, the heat primary air pipeline of present embodiment is provided with two thermocouples 7 that are used to measure the heat primary air temperature for the 3rd section 10, has the temperature of measurement advantage accurately.Other is identical with the specific embodiment one.
The specific embodiment four:, between the arrival end of second section 6 in tiny-oil ignition small oil gun 11 and heat primary air pipeline, be provided with a thermocouple 7 that is used to measure the heat primary air temperature on second section 6 in the airduct road of present embodiment in conjunction with Fig. 1 explanation.Present embodiment and the specific embodiment three combinations can realize multimetering.Other is identical with the specific embodiment one or three.
Typically use bituminous coal fired boiler with certain and (join the 300MW unit, the 1000t/h level, adopt the coal-burning boiler of unit pulverized-coal system) be described as follows for example: second section in the heat primary air pipeline of boiler is changed (former pipe material is an ordinary steel, now be replaced by heat resisting steel), on second section in the heat primary air pipeline after the replacing, increase the tiny-oil ignition oil gun of a fuel consume 80kg/h, and set up the thermocouple 7 that is used to measure the heat primary air temperature in the upstream and downstream of this tiny-oil ignition oil gun (be between the arrival end of second section 6 in tiny-oil ignition small oil gun 11 and heat primary air pipeline and heat primary air pipeline the 3rd section 10 on).Adopt above-mentioned structure, the air oxygen content that enters into the heat primary air in the heat primary air subtube 9 is reduced to about 17% by original 21%, has therefore improved the security of system's operation greatly; A wind-warm syndrome degree will improve about 19 ℃ simultaneously, and the dry main force of pulverized coal preparation system will improve.
The utility model under the situation of existing equipment, at utmost improves the drying of pulverized coal preparation system and exerts oneself under the prerequisite of improving the boiler milling system safety in operation with the minimum system reform, mix burning with the brown coal of realizing the boiler maximum ratio.
Claims (4)
1. one kind uses bituminous coal fired boiler and mixes in the burning brown coal combustion process and to improve the powder process drying system of exerting oneself, and described system comprises primary air fan (1), rotary regenerative air preheater (2), heat primary air pipeline first section (3), heat primary air pipe outlet cut-off gate (4), old name for the Arabian countries in the Middle East's ground circle connector (5), heat primary air pipeline second section (6), the female pipe of heat primary air (8), heat primary air pipeline the 3rd section (10), a cold airduct road (12) and many heat primary air subtubes (9); It is characterized in that: described system also comprises tiny-oil ignition small oil gun (11) and at least two thermocouples (7); Heat primary air pipeline second section (6) is 90 ° of elbows, the port of export of primary air fan (1) is communicated with the arrival end in a cold airduct road (12), the port of export in a cold airduct road (12) is communicated with a wind arrival end sealing of rotary regenerative air preheater (2), the arrival end sealing of a wind port of export and heat primary air pipeline first section (3) of rotary regenerative air preheater (2) is communicated with, the hot smoke outlet of air preheater inlet flue gas pipeline (13) is communicated with the smoke inlet end sealing of rotary regenerative air preheater (2), the smoke outlet of rotary regenerative air preheater (2) is communicated with the arrival end sealing of air preheater outlet flue (14), the port of export of heat primary air pipeline first section (3) is communicated with the arrival end of heat primary air pipeline second section (6) by old name for the Arabian countries in the Middle East's ground circle connector (5), the heat primary air pipeline is equipped with heat primary air pipe outlet cut-off gate (4) near port of export place in first section (3), the port of export of heat primary air pipeline second section (6) is communicated with the arrival end of heat primary air pipeline the 3rd section (10), the port of export of heat primary air pipeline the 3rd section (10) is communicated with the arrival end of the female pipe of heat primary air (8), the female pipe of heat primary air (8) is provided with a plurality of heat primary air outlets, a plurality of heat primary air outlets and the corresponding one by one setting of many heat primary air subtubes (9) on the female pipe of heat primary air (8), each heat primary air outlet on the female pipe of heat primary air (8) is communicated with the arrival end of corresponding heat primary air subtube (9), the heat primary air pipeline is equipped with tiny-oil ignition small oil gun (11) on second section (6), the outlet of tiny-oil ignition small oil gun (11) and heat primary air pipeline second section (6) are communicated with, and are positioned between the arrival end of tiny-oil ignition small oil gun (11) and heat primary air pipeline second section (6) on the heat primary air pipeline second section (6) and respectively are respectively equipped with at least one thermocouple that is used to measure the heat primary air temperature (7) on the heat primary air pipeline the 3rd section (10).
2. the bituminous coal fired boiler that uses according to claim 1 is mixed in the burning brown coal combustion process and to be improved the powder process drying system of exerting oneself, and it is characterized in that: described heat primary air pipeline second section (6) is second section in heat resisting steel heat primary air pipeline.
3. the bituminous coal fired boiler that uses according to claim 1 is mixed in the burning brown coal combustion process and to be improved the powder process drying system of exerting oneself, and it is characterized in that: heat primary air pipeline the 3rd section (10) is provided with two thermocouples (7) that are used to measure the heat primary air temperature.
4. mix in the burning brown coal combustion process and to improve the powder process drying system of exerting oneself according to claim 1 or the 3 described bituminous coal fired boilers that use, it is characterized in that: be positioned on airduct road second section (6) between the arrival end of tiny-oil ignition small oil gun (11) and heat primary air pipeline second section (6) and be provided with a thermocouple (7) that is used to measure the heat primary air temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200440643U CN202002139U (en) | 2011-02-22 | 2011-02-22 | Pulverization drying capacity improving system for lignite coal combustion process of bituminous coal boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200440643U CN202002139U (en) | 2011-02-22 | 2011-02-22 | Pulverization drying capacity improving system for lignite coal combustion process of bituminous coal boiler |
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| CN202002139U true CN202002139U (en) | 2011-10-05 |
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| CN2011200440643U Expired - Fee Related CN202002139U (en) | 2011-02-22 | 2011-02-22 | Pulverization drying capacity improving system for lignite coal combustion process of bituminous coal boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155842A (en) * | 2011-02-22 | 2011-08-17 | 黑龙江省电力科学研究院 | System for increasing pulverizing and drying output force during doped lignitous coal burning of burning bituminous coal boiler |
| CN103115370A (en) * | 2012-11-14 | 2013-05-22 | 辽宁省电力有限公司电力科学研究院 | Processing method for improving drying output of brown coal boiler |
-
2011
- 2011-02-22 CN CN2011200440643U patent/CN202002139U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155842A (en) * | 2011-02-22 | 2011-08-17 | 黑龙江省电力科学研究院 | System for increasing pulverizing and drying output force during doped lignitous coal burning of burning bituminous coal boiler |
| CN102155842B (en) * | 2011-02-22 | 2012-07-25 | 黑龙江省电力科学研究院 | System for increasing pulverizing and drying output force during doped lignitous coal burning of burning bituminous coal boiler |
| CN103115370A (en) * | 2012-11-14 | 2013-05-22 | 辽宁省电力有限公司电力科学研究院 | Processing method for improving drying output of brown coal boiler |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HEILONGJIANG ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20130424 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: HEILONGJIANG ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20130424 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 150030 HARBIN, HEILONGJIANG PROVINCE TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130424 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Heilongjiang Electric Power Research Institute Address before: 150030 Xiangjiang Road, Xiangfang District, Heilongjiang, No. 7, No. Patentee before: Heilongjiang Electric Power Research Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20180222 |