CN103499196B - Heat exchanger recycling exhaust-gas moisture after lignite is dried - Google Patents
Heat exchanger recycling exhaust-gas moisture after lignite is dried Download PDFInfo
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- CN103499196B CN103499196B CN201310421851.9A CN201310421851A CN103499196B CN 103499196 B CN103499196 B CN 103499196B CN 201310421851 A CN201310421851 A CN 201310421851A CN 103499196 B CN103499196 B CN 103499196B
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- heat exchanger
- quartz sand
- water
- exhaust
- lignite
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Abstract
The invention belongs to the field of recycling of lignite exhaust-gas moisture, and particularly relates to a heat exchanger recycling exhaust-gas moisture after lignite is dried. A lignite drying roller, the heat exchanger, a booster fan and a chimney are connected in sequence. A plurality of quartz sand walls arranged in a suspended mode are distributed in the heat exchanger in a staggered mode so as to form an exhaust-gas channel, and a plurality of sets of water spraying ports are formed in the exhaust-gas channel. A layer of quartz sand is laid on the bottom of the heat exchanger. According to the heat exchanger, hybrid heat exchange is adopted for water condensation, water is filtered through the quartz sand, then the purified water is obtained, and exhaust gas is purified in a wet dust removal and wet deacidification mode. According to the heat exchanger, the purified water is obtained through the exhaust gas, the exhaust gas is purified, and the objects of energy conservation and emission reduction of a lignite drying system are achieved.
Description
Technical field
The invention belongs to the recycling field that the weary air water of brown coal divides, the weary air water particularly after a kind of drying brown coal divides recycling heat exchanger.
Background technology
The total moisture content of brown coal is very high, and generally 25% ~ 40%, some area, if Neogene Zhaotong Brown Coal moisture is up to more than 50%, and high-moisture causes vapour content in flue gas to increase, and flue gas loss increases, and water resource waste is serious.In addition, be mainly distributed in the areas such as the Inner Mongol, northeast, Yunnan due to China's brown coal, mostly be drought and water-scarce area, power plant water is comparatively nervous.The moisture that brown coal drying evaporates is reclaimed, as recirculated water make-up water after water treatment system process, effectively can be reduced the water consumption of power plant, alleviated locality water pressure greatly.
Summary of the invention
For the problems referred to above, the object of this invention is to provide the weary air water after a kind of drying brown coal and divide recycling heat exchanger.
For realizing described goal of the invention, the technical solution used in the present invention is as follows:
Brown coal drying cylinder, heat exchanger, booster fan, chimney connect successively; The quartz sand body of wall of several cantilever configuration be interspersed is set in heat exchanger, forms snakelike weary gas passage, and some groups of water jets are set in weary gas passage; Exchanger base lays one deck quartz sand.
One or more in described quartz sand body of wall in dopped activated carbon, ANTHRACITE FILTER MEDIA and acidizer.
The bottom surface of the most final stage quartz sand body of wall of described heat exchanger sets out the mouth of a river.
The housing of described heat exchanger adopts corrosion resistant steel.。
The present invention compared with prior art, has the following advantages:
(1) heat exchanger adopts hybrid, directly contacts and carry out heat exchange and cool weary gas with aqueous water with weary gas, avoids the dirtiness resistance of conduct heat partition and both sides thereof, has larger rate of heat transfer.
(2) wet dust removal, wet method deacidifies.The efficiency of this dedusting method is high, can also remove portion gaseous contaminant while dedusting.A large amount of steam is had, dust and SO in the weary gas that drying brown coal produces
2deng dusty gas, and after heat exchanger process, water vapor condensation reclaims, dust and SO
2can be adsorbed by quartz sand, not only obtain pure water, and purify weary gas.
(3) heat exchanger adopts quartz sand as medium (filtrate), have that filtration resistance is little, specific area is large, resistance to acids and bases is strong, resistance to oxidation, the PH scope of application are the advantages such as 2-13, resistance tocrocking is good, life cycle is long, and quartz sand has very strong adaptivity to former water (condensate water) concentration, operating condition, pretreatment technique etc., namely when filtering, filter bed is automatically formed and dredges lower close state, is conducive to ensureing effluent quality at various operating conditions.
(4) quartz sand filter media low price, has again good mechanical performance.The service life of general quartz sand filter media is 2-3, changes afterwards.Quartz sand can be passed through anti-cleaning treatment to carry out recovery secondary and utilizes after processing water quality, and what anti-cleaning can allow quartz sand filter media use more fully and not wastes.During the operation of backwash link, current, through the reverse inflow heat exchanger of bottom discharge mouth, to rinse out the blocking material in quartz sand, and reduce the factor producing the loss of flood peak; Also anti-cleaning equipment can be equipped in heat exchanger.
(5) moisture through trapping can be used as recirculated water make-up water for cooling weary gas, reduces the water consumption of power plant.
(6) supporting construction made by available corrosion resistant steel (acid resisting steel), and Binder Materials made by waterglass, to solidify quartz sand structure, do not affect its effectiveness again; Can dopped activated carbon and ANTHRACITE FILTER MEDIA in quartz sand, to increase effect; SO can be removed by dopant acid inorganic agent quartz sand to increase
2deng the effect of sour gas.
(7) China's brown coal are mainly distributed in the areas such as the Inner Mongol, northeast, Yunnan, and these regional quartz sand rich contents, do not need long-distance transport, reduce cost.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Number in the figure:
1-brown coal drying cylinder, 2-heat exchanger, 3-water jet, 4-quartz sand body of wall, 5-booster fan, 6-chimney.
Detailed description of the invention
The invention provides the weary air water after a kind of drying brown coal and divide recycling heat exchanger, below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is further described.
As shown in Figure 1, brown coal drying cylinder 1, heat exchanger 2, booster fan 5, chimney 6 connect successively; The housing of heat exchanger 2 adopts corrosion resistant steel, arranges the quartz sand body of wall 4 of several cantilever configuration be interspersed, form snakelike weary gas passage, and arrange some groups of water jets 3 in weary gas passage in heat exchanger 2; One deck quartz sand is laid bottom heat exchanger 2.The bottom surface of the most final stage quartz sand body of wall 4 of heat exchanger 2 sets out the mouth of a river.
One or more in quartz sand body of wall 4 in dopped activated carbon, ANTHRACITE FILTER MEDIA and acidizer.
High-temperature flue gas passes into brown coal drying cylinder 1 drying brown coal, and its weary gas produced directly passes into heat exchanger 2 entrance.The water that water jet 3 in heat exchanger 2 sprays and weary gas mixed heat exchange, cool weary gas, until outlet makes weary gas be down to uniform temperature.And condensed water (is mixed with dust and acid contaminant, as H
2sO
4) and the water that sprays into, infiltrate the quartz sand of quartz sand body of wall 4 and heat exchanger bottom together, quartz sand adsorption of dust and acid contaminant, discharge pure water by heat exchanger discharge outlet, and a pure water part of discharging can cool weary gas by water pump again.Weary gas after purification, through booster fan 5, enters air finally by chimney 6.
Claims (2)
1. the weary air water after drying brown coal divides a recycling heat exchanger, it is characterized in that, brown coal drying cylinder (1), heat exchanger (2), booster fan (5), chimney (6) connect successively; The quartz sand body of wall (4) of several cantilever configuration be interspersed is set in heat exchanger (2), forms snakelike weary gas passage, and some groups of water jets (3) are set in weary gas passage; The bottom surface of the most final stage quartz sand body of wall (4) of heat exchanger (2) sets out the mouth of a river; One deck quartz sand is laid in heat exchanger (2) bottom; One or more in the interior dopped activated carbon of described quartz sand body of wall (4), ANTHRACITE FILTER MEDIA and acidizer.
2. the weary air water after a kind of drying brown coal according to claim 1 divides recycling heat exchanger, it is characterized in that, the housing of described heat exchanger (2) adopts corrosion resistant steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310421851.9A CN103499196B (en) | 2013-09-16 | 2013-09-16 | Heat exchanger recycling exhaust-gas moisture after lignite is dried |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310421851.9A CN103499196B (en) | 2013-09-16 | 2013-09-16 | Heat exchanger recycling exhaust-gas moisture after lignite is dried |
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| Publication Number | Publication Date |
|---|---|
| CN103499196A CN103499196A (en) | 2014-01-08 |
| CN103499196B true CN103499196B (en) | 2015-06-03 |
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| CN201310421851.9A Expired - Fee Related CN103499196B (en) | 2013-09-16 | 2013-09-16 | Heat exchanger recycling exhaust-gas moisture after lignite is dried |
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| CN108671733B (en) * | 2018-07-31 | 2023-05-02 | 太仓市宇格明叶环保设备有限公司 | Horizontal cross waste gas washing tower and working method thereof |
Citations (5)
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|---|---|---|---|---|
| CN101822910A (en) * | 2010-04-21 | 2010-09-08 | 吴植仁 | Method for reclaiming water from dry flue gas of high dew point lignite |
| CN102936063A (en) * | 2012-10-25 | 2013-02-20 | 中国五环工程有限公司 | Process method and system for recovering water from lignite drying flue gas |
| CN202869197U (en) * | 2012-11-09 | 2013-04-10 | 中国神华能源股份有限公司 | Tail gas treatment device used for brown coal drying system and brown coal drying system |
| CN202936263U (en) * | 2012-10-25 | 2013-05-15 | 中国五环工程有限公司 | Water recovery system for lignite drying flue gas |
| CN203672100U (en) * | 2013-09-16 | 2014-06-25 | 华北电力大学（保定） | Moisture recycling heat exchanger for exhaust after drying of brown coal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6051790A (en) * | 1983-08-31 | 1985-03-23 | Hitachi Ltd | Method for upgrading low-grade coal |
| JP5068698B2 (en) * | 2008-06-19 | 2012-11-07 | 太平洋セメント株式会社 | Cement kiln extraction gas processing system and processing method |
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2013
- 2013-09-16 CN CN201310421851.9A patent/CN103499196B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822910A (en) * | 2010-04-21 | 2010-09-08 | 吴植仁 | Method for reclaiming water from dry flue gas of high dew point lignite |
| CN102936063A (en) * | 2012-10-25 | 2013-02-20 | 中国五环工程有限公司 | Process method and system for recovering water from lignite drying flue gas |
| CN202936263U (en) * | 2012-10-25 | 2013-05-15 | 中国五环工程有限公司 | Water recovery system for lignite drying flue gas |
| CN202869197U (en) * | 2012-11-09 | 2013-04-10 | 中国神华能源股份有限公司 | Tail gas treatment device used for brown coal drying system and brown coal drying system |
| CN203672100U (en) * | 2013-09-16 | 2014-06-25 | 华北电力大学（保定） | Moisture recycling heat exchanger for exhaust after drying of brown coal |
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| CN103499196A (en) | 2014-01-08 |
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Granted publication date: 20150603 Termination date: 20160916 |