CN111207407A - Method for improving discharged moisture content unsaturation degree through flue gas self-heating - Google Patents
Method for improving discharged moisture content unsaturation degree through flue gas self-heating Download PDFInfo
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- CN111207407A CN111207407A CN201910992320.2A CN201910992320A CN111207407A CN 111207407 A CN111207407 A CN 111207407A CN 201910992320 A CN201910992320 A CN 201910992320A CN 111207407 A CN111207407 A CN 111207407A
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- Prior art keywords
- flue gas
- heat
- moisture content
- temperature
- heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
- F23J2900/15081—Reheating of flue gases
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention relates to the technical field of flue gas treatment, in particular to a method for improving the unsaturation degree of discharged moisture content in a self-heating manner by flue gas, which reduces the installation and maintenance cost and is convenient to install and implement; the method comprises the following steps: (1) a flue gas cooler is arranged in front of the desulfurization system or the temperature-reducing and dust-removing system, and the flue gas treated by the desulfurization system or the temperature-reducing and dust-removing system is cooled by circulating water, so that the temperature of the flue gas and the atmospheric temperature are within a certain difference range; (2) after removing liquid fog drops by a physical method, a flue gas heater is arranged to heat the liquid fog drops into flue gas with unsaturated moisture content for emission; (3) the heat conducting liquid is communicated between the flue gas cooler and the flue gas heater, and the heat of the flue gas cooler is transferred to the flue gas heater to heat the flue gas.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a method for improving the unsaturation degree of discharged moisture content by flue gas self-heating.
Background
As is well known, with the enhancement of environmental awareness of people, the national requirements on environmental protection are higher and higher, and besides various harmful indexes in smoke, the smoke emission is required to be invisible to human eyes. In order to achieve the purpose that the human body can not see the smoke emission by naked eyes, the current adopted method comprises the following steps:
1. circulating water is used for cooling, so that the temperature of the flue gas and the atmospheric temperature are within a certain difference range, liquid fog drops are removed by a physical method, the flue gas is saturated and discharged in moisture content, the method is suitable for being used in summer, but in winter, particularly after the atmospheric temperature is lower than minus 10 ℃, the difference between the exhaust temperature of the flue gas and the atmospheric temperature is difficult to ensure to be within a certain range, and therefore the method is not ideal when the atmospheric temperature is lower than minus 10 ℃.
2. The circulating water is cooled to ensure that the temperature of the flue gas and the atmospheric temperature are within a certain difference range, liquid fog drops are removed by an electromagnetic field method, and the flue gas is heated to form unsaturated moisture content and is discharged. The method for heating the flue gas comprises the following steps: a. steam heating: on the basis of 10 ten thousand square flue gas meters per hour, about 2 tons of 0.6Mpa steam with the value of 300 yuan is needed for heating the flue gas to 30 ℃ per hour, the method can be carried out only when the residual steam is available, the operation cost is low, and 240 ten thousand yuan per year is needed; b. electric heating: on the basis of 10 ten thousand square flue gas meters per hour, when the temperature of the flue gas is increased by 30 ℃, about 1200 ℃ of electricity is consumed per hour, the value is about 600 yuan, and the annual running cost is about 480 ten thousand yuan; c. heat exchange of hot flue gas to cold flue gas: the method almost has no operation cost, but has large one-time investment, large heat exchange area, large diameter of inlet and outlet pipes of cold and hot flue gas, difficult piping, large occupied space and great implementation difficulty; d. the hot flue gas is directly added into the cold flue gas, and the method is equivalent to that the hot flue gas approaches to the road and is directly discharged without desulfurization and dust removal, which is not desirable; e. the hot air is directly added into the cold flue gas, the method needs a hot air source, if a new hot blast stove is needed to realize that firstly the investment is high, secondly, fuel is consumed to realize air heating, and the operation cost is not low.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for improving the unsaturation degree of the discharged moisture content in an environment-friendly self-heating manner by flue gas, which reduces the installation and maintenance cost, is convenient to install and implement and protects the environment.
The invention discloses a method for improving the unsaturation degree of discharged moisture content in a flue gas self-heating manner, which comprises the following steps of:
(1) a flue gas cooler is arranged in front of the desulfurization system or the temperature-reducing and dust-removing system, and the flue gas treated by the desulfurization system or the temperature-reducing and dust-removing system is cooled by circulating water, so that the temperature of the flue gas and the atmospheric temperature are within a certain difference range;
(2) after removing liquid fog drops by a physical method, a flue gas heater is arranged to heat the liquid fog drops into flue gas with unsaturated moisture content for emission;
(3) the heat conducting liquid is communicated between the flue gas cooler and the flue gas heater, and the heat of the flue gas cooler is transferred to the flue gas heater to heat the flue gas.
The invention discloses a method for improving the unsaturation degree of discharged moisture content in a self-heating manner by flue gas, wherein heat-conducting liquid in the step (3) is driven by a circulating pump, and the heat-conducting liquid is provided with a storage tank for buffering.
The invention discloses a method for improving the unsaturation degree of discharged moisture content in a self-heating manner by flue gas, wherein the heat conducting liquid in the step (3) is water, desalted water, heat conducting oil, alcohol and other liquids capable of absorbing heat and releasing heat.
Compared with the prior art, the invention has the beneficial effects that: compared with the method of heating by utilizing electricity and steam, the method utilizes the self heat of the flue gas to heat, not only is the installation simple and convenient, but also the installation and the cost are greatly reduced.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example (b): a flue gas cooler is arranged in front of a desulfurization system or a cooling and dedusting system, flue gas treated by the desulfurization system or the cooling and dedusting system is cooled by circulating water, so that the temperature of the flue gas and the atmospheric temperature are within a certain difference range, then a flue gas heater is arranged to heat the flue gas into flue gas with unsaturated moisture content after liquid fog drops are removed by a physical method, heat-conducting liquid is communicated between the flue gas cooler and the flue gas heater, the heat of the flue gas cooler is transferred to the flue gas heater to heat the flue gas, the heat-conducting liquid is driven by a circulating pump, and the heat-conducting liquid is provided with a storage tank to buffer, and the heat-conducting liquid is water, desalted water, heat-conducting oil, alcohol and other liquids capable of absorbing.
Comparative example 1:
circulating water is used for cooling, so that the temperature of the flue gas and the atmospheric temperature are within a certain difference range, liquid fog drops are removed by an electromagnetic field method, and the flue gas is heated by steam to form unsaturated moisture content and is discharged.
Comparative example 2:
circulating water is used for cooling, so that the temperature of the flue gas and the atmospheric temperature are within a certain difference range, liquid fog drops are removed through a physical method, and the flue gas is electrically heated to form unsaturated moisture content and is discharged.
The following data were obtained from the two year implementation of the above method:
the above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A method for improving the discharged moisture content unsaturation degree by flue gas self-heating is characterized by comprising the following steps:
(1) a flue gas cooler is arranged in front of the desulfurization system or the temperature-reducing and dust-removing system, and the flue gas treated by the desulfurization system or the temperature-reducing and dust-removing system is cooled by circulating water, so that the temperature of the flue gas and the atmospheric temperature are within a certain difference range;
(2) after removing liquid fog drops by a physical method, a flue gas heater is arranged to heat the liquid fog drops into flue gas with unsaturated moisture content for emission;
(3) the heat conducting liquid is communicated between the flue gas cooler and the flue gas heater, and the heat of the flue gas cooler is transferred to the flue gas heater to heat the flue gas.
2. The method for improving the exhaust moisture content unsaturation degree through the self-heating of the flue gas as claimed in claim 1, wherein the heat transfer liquid in the step (3) is driven by a circulating pump, and the heat transfer liquid is provided with a storage tank for buffering.
3. The method for improving the exhaust moisture content unsaturation degree through self-heating of flue gas as claimed in claim 2, wherein the heat conducting liquid in step (3) is a liquid capable of absorbing heat and releasing heat, such as water, desalted water, heat conducting oil, alcohol and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910992320.2A CN111207407A (en) | 2019-10-18 | 2019-10-18 | Method for improving discharged moisture content unsaturation degree through flue gas self-heating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910992320.2A CN111207407A (en) | 2019-10-18 | 2019-10-18 | Method for improving discharged moisture content unsaturation degree through flue gas self-heating |
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| CN111207407A true CN111207407A (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910992320.2A Pending CN111207407A (en) | 2019-10-18 | 2019-10-18 | Method for improving discharged moisture content unsaturation degree through flue gas self-heating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268465A (en) * | 2020-10-23 | 2021-01-26 | 鞍山绿冶热能工程技术有限公司 | Coke oven flue gas desulfurization and denitrification waste heat recovery system and process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107781832A (en) * | 2017-11-20 | 2018-03-09 | 孙卉丽 | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system and method |
| CN108722127A (en) * | 2018-05-31 | 2018-11-02 | 中国能源建设集团广东省电力设计研究院有限公司 | Desulfurization wet flue gas demister system |
| CN208419646U (en) * | 2018-07-04 | 2019-01-22 | 上海中芬新能源投资有限公司 | Sintering flue gas white cigarette governing system |
| CN109550341A (en) * | 2018-11-21 | 2019-04-02 | 浙江菲达环保科技股份有限公司 | Alkali recovery furnace flue gas minimum discharge device and flue gas processing method |
-
2019
- 2019-10-18 CN CN201910992320.2A patent/CN111207407A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107781832A (en) * | 2017-11-20 | 2018-03-09 | 孙卉丽 | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system and method |
| CN108722127A (en) * | 2018-05-31 | 2018-11-02 | 中国能源建设集团广东省电力设计研究院有限公司 | Desulfurization wet flue gas demister system |
| CN208419646U (en) * | 2018-07-04 | 2019-01-22 | 上海中芬新能源投资有限公司 | Sintering flue gas white cigarette governing system |
| CN109550341A (en) * | 2018-11-21 | 2019-04-02 | 浙江菲达环保科技股份有限公司 | Alkali recovery furnace flue gas minimum discharge device and flue gas processing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268465A (en) * | 2020-10-23 | 2021-01-26 | 鞍山绿冶热能工程技术有限公司 | Coke oven flue gas desulfurization and denitrification waste heat recovery system and process |
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Application publication date: 20200529 |