CN101358770B - Method for utilizing flue gas low-temperature heat quantity for industrial furnace - Google Patents
Method for utilizing flue gas low-temperature heat quantity for industrial furnace Download PDFInfo
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- CN101358770B CN101358770B CN2008101959316A CN200810195931A CN101358770B CN 101358770 B CN101358770 B CN 101358770B CN 2008101959316 A CN2008101959316 A CN 2008101959316A CN 200810195931 A CN200810195931 A CN 200810195931A CN 101358770 B CN101358770 B CN 101358770B
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- air preheater
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- regenerative air
- flue gas
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The present invention relates to a method for utilizing the low-temperature heat of the smoke of the industry furnace; three groups or more of the heat accumulation air pre-heaters are connected to each other in parallelism. The present invention adopts the process that the smoke that is from the counter-flow section of the heating furnace and is higher than the dew point flows to a first group of heat accumulation air pre-heater; after the heat is transferred to a heat accumulation body of a first group of heat accumulation air pre-heater, the temperature of the smoke is reduced to 70 DEG C or less, and is discharged to the chimney; during the temperature reduction process, a condensed fluid is precipitated; the condensed fluid is discharged into a collection pipeline through an automatic liquid sealing device valve to be collected; the air flows to the heat accumulation air pre-heater that accumulates the heat; at the same time, the heat accumulation body in the heat accumulation air pre-heater transfers the accumulated heat to the air, and the produced high-temperature air flows to the combustor to be combusted at a high temperature; when three groups or more of the heat accumulation air pre-heater are connected with each other in parallelism, the air flows to the next group of the heat accumulation air pre-heater to perform the same heat exchanging process; the paralleling-connected three groups or more of the air pre-heaters are automatically switched, so as to realize the automatic control. The dew point is used to condense the acid gas in the smoke, thereby realizing the dual functions of energy conservation and environmental protection.
Description
(1) technical field
The present invention relates to a kind of flue gas low-temperature heat quantity for industrial furnace and utilize method, especially relate to the utilization of the low-temperature heat quantity of the following temperature of a kind of flue gas dew point.Belong to the petrochemical equipment technical field.
(2) background technology
Along with rapid growth of economy, every construction obtains great achievement, but has also paid huge resource and environmental cost, and the contradiction of economic development and resource environment is sharp-pointed day by day, the problem of environmental pollution strong reaction.This is directly related with irrationality of the economic structure, extensive pattern of economic growth.The dusty gas discharging causes that global climate is abominable.Investigation shows that waters, West Coast, North America in 2007 seawater is acid to be strengthened, another sign that near the current acid seawater that the waters is found seashore is a global warming.
Heating furnace in the petroleum chemical industry is to be main fuel with fuel oil, fuel gas, the CO in its flue gas main component
2, SO
x, NO
xSour gas such as (wherein X=2 3), these gas temperatures are reduced to below the dew point, will cause heavy corrosion to equipment, and these gases enter atmosphere and run into rainwater and can be dissolved in and wherein form acid rain.
Oil refining tubular heater discharged flue gas temperature will be strict controlled in more than the dew point, and general exhaust gas temperature this shows that existing heat below 200 ℃ is not utilized in the flue gas, and CO is also arranged about 200 ℃
2, SO
x, NO
xIn acid pollution gas discharging atmosphere, cause serious environmental to pollute.
In order to satisfy the requirement of environmental emission standard, present many enterprises adopt low sulphur fuel oil and/or adopt flue gas desulfurization technique, because its investment is big, operating cost is high, floor space is big, flow process is complicated, so be difficult to use.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of flue-gas temperature below the dew point can being reduced to below the dew point to discharge so that the heat that it had is utilized, the flue gas low-temperature heat quantity for industrial furnace that the acid pollution gas in the flue gas is collected can be utilized method again simultaneously near the temperature of normal temperature.
The object of the present invention is achieved like this: a kind of flue gas low-temperature heat quantity for industrial furnace utilizes method, it is characterized in that described method is to utilize three groups and above regenerative air preheater to be connected in parallel, described regenerative air preheater be to be wall with pottery or enamel or ceramic matric composite, ceramic heat storage body is the air preheater of heat transfer element, described method specifically comprises following technical process: from first triple valve of first group of regenerative air preheater of the flue gas flow direction that is higher than dew point of heating furnace convection section, enter first group of regenerative air preheater through first triple valve, flue gas is through the heat storage of first group of regenerative air preheater of heat transferred and be cooled to below 70 ℃, second triple valve inflow flue through first group of regenerative air preheater enters chimney, can separate out condensed liquid in the flue gas cool-down process, condensed liquid enters the centralized collection pipeline through automatic liquid seal device valve and collects, and realizes reducing discharging; When below the flue gas cool-down to 70 ℃, the second triple valve tangential air circulation status of first group of regenerative air preheater, air is through this second triple valve, flow to accumulation of heat regenerative air preheater, heat storage in the regenerative air preheater is with the heat transferred air of accumulation of heat simultaneously, the high temperature air that produces flows to burner through first triple valve, carries out high-temp combustion, realizes that the combustion-supporting burning of hot-air reaches energy-conservation; Then flow to the regenerative air preheater of second group of regenerative air preheater through first triple valve of second group of regenerative air preheater from the flue gas that is higher than dew point of heating furnace convection section, carry out finishing exchange heat as the described first group of regenerative air preheater identical process of flowing through, when three groups and above regenerative air preheater are in parallel, then flow to next group successively and carry out same heat exchanging process, realize energy-saving and emission-reduction, in parallel three groups and above air preheater switch automatically, realize control automatically.
The invention has the beneficial effects as follows:
The present invention is by utilizing many group regenerative air preheaters, to be higher than the heat that is had in the flue gas of dew point and pass through regenerative air preheater, make it be reduced to the following temperature discharging of dew point, the acidic liquid in the regenerative air preheater condensation separation flue gas near normal temperature.Flue gas dew point liquefaction in condensation process has a large amount of latent heats of vaporization to discharge, heat output is given the ceramic heat storage body air preheater, the air that absorbs heat by regenerative air preheater is delivered to burner, as combustion air, improve the combustion air temperature and reach purpose of energy saving, improve thermal efficiency of heating furnace, can improve furnace temp field evenly heat intensity simultaneously, play energy-conserving action; After regenerative air preheater is reduced to the following temperature near normal temperature of dew point, the CO in the flue gas
2, SO
x, NO
xWill form liquid with the steam dewfall of generation in the burning Deng sour gas.
Because regenerative air preheater of the present invention, adopting pottery or enamel or ceramic matric composite is that wall, ceramic heat storage body are heat transfer element, has the performance of not corroding with acid, with liquids recovery, processing and even utilization.
Utilize the condensing acidic gas in flue gas of dew point, owing to contain a large amount of steam in the flue gas, dew point liquefaction has a large amount of latent heats of vaporization to discharge, make heater efficiency improve more than 4% the following heat recovery of flue gas dew point, the following sour gas of condensing recovery flue gas dew point, sour gas reduces discharging more than 29%, and the condensing liquid under the condensation separation focuses on, and reaches the energy-conserving and environment-protective double effects.
(4) description of drawings
Fig. 1 is a flue gas low-temperature heat quantity for industrial furnace use device general structure schematic diagram of the present invention.
(5) specific embodiment
Referring to Fig. 1, the flue gas low-temperature heat quantity for industrial furnace that the present invention relates to utilizes method, be to utilize three groups and above regenerative air preheater to be connected in parallel, described regenerative air preheater be to be wall with pottery or enamel or ceramic matric composite, ceramic heat storage body is the air preheater of heat transfer element, described method specifically comprises following technical process: from first triple valve of first group of regenerative air preheater of the flue gas flow direction that is higher than dew point of heating furnace convection section, enter first group of regenerative air preheater through first triple valve, flue gas is through the heat storage of first group of regenerative air preheater of heat transferred and be cooled to below 70 ℃, second triple valve inflow flue through first group of regenerative air preheater enters chimney, can separate out condensed liquid in the flue gas cool-down process, condensed liquid enters the centralized collection pipeline through automatic liquid seal device valve and collects; When below the flue gas cool-down to 70 ℃, the second triple valve tangential air circulation status of first group of regenerative air preheater, air is through this second triple valve, flow to accumulation of heat regenerative air preheater, heat storage in the regenerative air preheater is with the heat transferred air of accumulation of heat simultaneously, the high temperature air that produces flows to burner through first triple valve, carries out high-temp combustion; Then flow to the regenerative air preheater of second group of regenerative air preheater through first triple valve of second group of regenerative air preheater from the flue gas that is higher than dew point of heating furnace convection section, carry out finishing exchange heat as the described first group of regenerative air preheater identical process of flowing through, when three groups and above regenerative air preheater are in parallel, then flow to next group successively and carry out same heat exchanging process, in parallel three groups and above air preheater switch automatically, realize control automatically.
Claims (1)
1. a flue gas low-temperature heat quantity for industrial furnace utilizes method, it is characterized in that described method is to utilize three groups of above regenerative air preheaters to be connected in parallel, described regenerative air preheater be to be wall with pottery or enamel or ceramic matric composite, ceramic heat storage body is the air preheater of heat transfer element, described method specifically comprises following technical process: from first triple valve of first group of regenerative air preheater of the flue gas flow direction that is higher than dew point of heating furnace convection section, enter first group of regenerative air preheater through first triple valve, flue gas is through the heat storage of first group of regenerative air preheater of heat transferred and be cooled to below 70 ℃, second triple valve inflow flue through first group of regenerative air preheater enters chimney, can separate out condensed liquid in the flue gas cool-down process, condensed liquid enters the centralized collection pipeline through automatic liquid seal device valve and collects; When below the flue gas cool-down to 70 ℃, the second triple valve tangential air circulation status of first group of regenerative air preheater, air is through this second triple valve, flow to accumulation of heat regenerative air preheater, heat storage in the regenerative air preheater is with the heat transferred air of accumulation of heat simultaneously, the high temperature air that produces flows to burner through first triple valve, carries out high-temp combustion; Then flow to the regenerative air preheater of second group of regenerative air preheater through first triple valve of second group of regenerative air preheater from the flue gas that is higher than dew point of heating furnace convection section, carry out finishing exchange heat as the described first group of regenerative air preheater identical process of flowing through, when three groups of above regenerative air preheaters are in parallel, then flow to next group successively and carry out same heat exchanging process, three groups of above air preheaters in parallel switch automatically, realize control automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101959316A CN101358770B (en) | 2008-09-05 | 2008-09-05 | Method for utilizing flue gas low-temperature heat quantity for industrial furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101959316A CN101358770B (en) | 2008-09-05 | 2008-09-05 | Method for utilizing flue gas low-temperature heat quantity for industrial furnace |
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| Publication Number | Publication Date |
|---|---|
| CN101358770A CN101358770A (en) | 2009-02-04 |
| CN101358770B true CN101358770B (en) | 2011-12-07 |
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| CN2008101959316A Expired - Fee Related CN101358770B (en) | 2008-09-05 | 2008-09-05 | Method for utilizing flue gas low-temperature heat quantity for industrial furnace |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126836B (en) * | 2010-01-18 | 2012-11-28 | 贾会平 | Method and machine for calcining materials |
| CN101830435B (en) * | 2010-04-07 | 2012-03-21 | 昆明理工大学 | Resource recycling method of metallurgical flue gas |
| CN102095312B (en) * | 2010-11-07 | 2012-05-02 | 湖南新恒光科技有限公司 | Process for recycling sulfuric acid from iron pyrite by low-temperature afterheat |
| CN102809168A (en) * | 2011-06-01 | 2012-12-05 | 中国石油化工股份有限公司 | Air preheater and application thereof |
| CN103471410B (en) * | 2013-09-17 | 2015-11-18 | 李�杰 | A kind of fuel heating furnace waste heat recycle method and system |
| CN104456947B (en) * | 2014-10-17 | 2018-02-13 | 北京航天益森风洞工程技术有限公司 | Heat accumulating type pure air heating system |
| CN109665499B (en) * | 2019-01-09 | 2023-09-12 | 大连科汇工程技术有限公司 | Waste sulfuric acid heat accumulating type incineration SO preparation 2 Process gas technology and system |
| CN113248113A (en) * | 2021-06-11 | 2021-08-13 | 秦皇岛合达能源科技开发有限公司 | Device and method for producing fibers by using coal gangue |
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| CN101358770A (en) | 2009-02-04 |
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Assignee: Yangzhou Goldstar Technology Industry Co.,Ltd. Assignor: Jiangyin Petroleum Chemical Industry Apparatus Co., Ltd. Contract record no.: 2012320010075 Denomination of invention: Method for utilizing flue gas low-temperature heat quantity for industrial furnace Granted publication date: 20111207 License type: Exclusive License Open date: 20090204 Record date: 20120426 |
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Granted publication date: 20111207 Termination date: 20160905 |