CN110645805A - Method for burning semi-coke tail gas in melting furnace of glass plant instead of producer gas - Google Patents
Method for burning semi-coke tail gas in melting furnace of glass plant instead of producer gas Download PDFInfo
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- CN110645805A CN110645805A CN201910954706.4A CN201910954706A CN110645805A CN 110645805 A CN110645805 A CN 110645805A CN 201910954706 A CN201910954706 A CN 201910954706A CN 110645805 A CN110645805 A CN 110645805A
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- gas
- valve
- semi
- tail gas
- coke tail
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/007—Systems for reclaiming waste heat including regenerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2001/00—Composition, conformation or state of the charge
- F27M2001/07—Glass
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a method for using semi-coke tail gas to replace producer gas for combustion of a melting furnace in a glass plant, which comprises the steps of replacing the producer gas with the semi-coke tail gas, cooling the high-temperature semi-coke tail gas twice to 25 ℃, conveying the semi-coke tail gas to a joint workshop through a pipeline, and dividing the semi-coke tail gas into two sub-pipelines through a manual gate valve, a pneumatic emergency cut-off valve and a pneumatic regulating valve; can effectively remove water vapor and partial impurities in the semi-coke tail gas, and can greatly improve the quality of raw gas and improve the heat value of the semi-coke tail gas to 1600kcal/Nm3The method can completely meet the glass melting requirement, and the semi-coke tail gas replaces producer gas, so that high-heating-value gas is saved, the fuel cost of a glass plant is reduced, and the benefit is improved.
Description
Technical Field
The invention relates to the technical field of gas supply modes, in particular to a method for burning semi coke tail gas in a melting furnace of a glass plant instead of producer gas.
Background
The low-temperature dry distillation coal gas is a byproduct of the semi-coke industry, is directly discharged before being in strategic decision of energy-saving, environment-friendly and sustainable development, and is used for power generation at present. The coal gas is characterized in that: the heat value is 1300-3Range, large fluctuation of heat value, normal temperature of gas, no tar in gasAnd contains a small amount of water vapor, which seriously affects the heat value and the heat transfer efficiency, and the pressure and the flow rate of the coal gas are not very stable.
In the prior art, the gas supply mode of a glass production line is divided into two types: one is to use coke oven gas with high heat value as fuel, the coke oven gas is generally from a coking plant, the gas heat value is 3800-3Or higher, the normal temperature tar gas enters the glass melting furnace for combustion through the spray gun after being pressurized. The other is that the producer gas is used as fuel, and the calorific value of the producer gas is 1400-1500kcal/Nm3The gas supply temperature is higher, the gas supply temperature of a single-section furnace is more than 450 ℃, the gas supply temperature of two end furnaces is more than 260 ℃, the hot gas from the gas producer contains a large amount of tar, the gas can be continuously heated and heated after entering a regenerative chamber of a melting furnace, and finally enters a glass melting furnace through a small furnace for combustion, although the heat value of the producer gas is not high, the tar mist floating in the hot gas plays an important role in glass melting, on one hand, the heat value is improved, and on the other hand, the heat transfer effect is strengthened.
The semi-coke tail gas generated in the semi-coke coking industrial production belongs to production waste gas, and the heat value is only 1300-1800 kcal/Nm-3On the left and right sides, and through the washing, electric tar precipitator decoking process, the tar in the coal gas has basically been removed, and the temperature also drops to normal temperature, and such coal gas is except that the electricity generation, and other aspects used very little. With the development of the modern semi-coke industry, in areas with rich coal resources, the gas yield is increased day by day, and the exhaust emission is increased day by day; the current state of the glass market requires glass manufacturers to reduce energy consumption costs to a new level. In view of the requirements of environmental protection and energy conservation, producer gas gradually exits from the glass industry. The cheap price of blue charcoal coal gas and convenient transport mode if collect it and be used for the glass production trade, can effectively reduce glass factory fuel cost, can avoid blue charcoal factory evacuation waste again, the polluted environment still can practice thrift high calorific value fuel, consequently, the blue charcoal tail gas of low calorific value as glass melting's gaseous fuel is the problem that technical staff in the field needs to solve urgently.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for burning a melting furnace of a glass plant by using semi-coke tail gas instead of producer gas, which comprises a manual gate valve, a pneumatic safety cut-off valve, a pneumatic regulating valve, a reversing valve, a manual regulating valve and a bleeding valve, wherein the manual gate valve is connected with the pneumatic safety cut-off valve through a conveying pipeline, the pneumatic safety cut-off valve is connected with the pneumatic regulating valve through a pipeline, the pneumatic regulating valve is divided into two pipelines which are respectively connected with the two pipelines, the reversing valve is connected with the manual regulating valve through a pipeline, the manual regulating valve and the bleeding valve are directly provided with a plurality of branch pipelines, and the bleeding valve is communicated with a heat accumulation chamber pipeline, and the method specifically comprises the following:
s1, conveying the semi-coke tail gas to a joint workshop through a pipeline, and dividing the semi-coke tail gas into two branch pipelines through a manual gate valve, a pneumatic emergency cut-off valve and a pneumatic regulating valve;
s2, the branch pipeline can be provided with a plurality of branch pipelines, and each branch pipeline is provided with a manual regulating valve;
s3, sending semi-coke tail gas to a left heat storage chamber and a right heat storage chamber through two branch pipelines, wherein the branch pipelines are respectively provided with a first reversing valve and a second reversing valve, one is used, and the other two branches are provided with four reversing valves;
s4, reversing once every 20 minutes through the reversing valve;
s5, respectively converging the gas into each gas branch flue after passing through a manual regulating valve, entering a heat storage chamber after passing through a gas branch flue gate plate, and preheating and heating in the heat storage chamber;
and S6, finally, feeding the semi-coke tail gas into a melting furnace for combustion through a small furnace.
In a further scheme, the semi-coke tail gas in the S1 is cooled to 80-85 ℃ by circulating ammonia water and then cooled to 25 ℃ by a horizontal tube cooler.
The semi-coke tail gas from coke oven is up to 650-700 deg.C, and contains many tar gas, benzene vapour, water vapour, ammonia vapour and hydrogen sulfide, etc.. Under the condition of high temperature, the chemical products can not be recovered, the impurities can not be removed, the gas can be effectively refined and the chemical products can be recovered only by reducing the temperature of the gas so as to improve the calorific value of the gas, in addition, the volume of the high-temperature gas is large, and the diameter of pipeline transportation also needs to be increasedLarge, and meanwhile, various loads are correspondingly increased, and high-temperature gas is dangerous to convey in the pipeline; therefore, in order to purify the gas, the gas must be further cooled to remove impurities for safety and improvement of the calorific value of the gas. After twice temperature reduction, the quality of raw gas can be greatly improved, so that the heat value of semi-coke tail gas is increased to 1600kcal/Nm3Thus, the requirements of glass melting can be completely met.
The invention has the following beneficial effects:
(1) the semi-coke tail gas is used as gas fuel for glass melting, so that the emission of the semi-coke tail gas is reduced, and the atmospheric environment is protected;
(2) the semi-coke tail gas is used for replacing producer gas, high-heating value gas is saved, fuel cost of a glass plant is reduced, and benefit is improved.
(3) The carbon tail gas is cooled to 80-85 ℃ by circulating ammonia water and then cooled to 25 ℃ by a horizontal tube cooler, so that water vapor and partial impurities in the semi-coke tail gas can be effectively removed, the quality of raw gas can be greatly improved, and the heat value of the semi-coke tail gas is increased to 1600kcal/Nm3Thus, the requirements of glass melting can be completely met.
(4) The semi-coke tail gas after being cooled twice enters a joint workshop, so that potential safety hazards of high-temperature gas conveying in a pipeline can be avoided.
(5) The first reversing valve and the second reversing valve are arranged on the branch pipeline, so that the two reversing valves are mutually used as standby, the coal gas reversing is safer and more reliable, and safety accidents caused by the faults of the reversing valves can be solved to a great extent.
Drawings
FIG. 1 is a schematic diagram of a low-temperature semi-coke tail gas conveying line and structure;
in the figure: 1 manual gate valve, 2 pneumatic emergency shut-off valves, 3 pneumatic control valves, 4 first switching-over valves, 5 manual control valves, 6 bleed valves, 7 a plurality of branch pipelines, 8 second switching-over valves.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
The semi-coke tail gas from the coke oven reaches 650-700 ℃, whereinThe gas refining and recycling device contains a plurality of tar gases, benzene steam, water vapor, ammonia vapor, hydrogen sulfide and the like, under the high-temperature condition, the chemical products can not be recycled, impurities can not be removed, and the gas can be effectively refined and recycled only by reducing the temperature of the gas, so that the heat value of the gas is improved. In addition, the high-temperature gas is large in volume, the diameter of pipeline transportation needs to be increased, and various loads are increased correspondingly. The transportation of high temperature gases within the pipeline is hazardous. Therefore, in order to purify the gas, the gas must be further cooled to remove impurities for safety and improvement of the calorific value of the gas. After the spraying of the circulating ammonia water, the temperature of the coal gas is reduced to 80-85 ℃, but the temperature is still too high, the tar gas and the water vapor are not completely condensed, and the coal gas needs to be further cooled by a transverse pipe cooler before a blower. The semi-coke tail gas is cooled to about 25 ℃ by a transverse pipe primary cooler, so that the moisture and partial impurities in the semi-coke tail gas can be effectively removed. The quality of the raw gas can be greatly improved, so that the calorific value of the semi-coke tail gas is increased to 1600kcal/Nm3Thus, the requirements of glass melting can be completely met.
As shown in fig. 1, the invention provides a method for burning a melting furnace of a glass plant by using semi-coke tail gas instead of producer gas, which comprises a manual gate valve, a pneumatic safety cut-off valve, a pneumatic regulating valve, a reversing valve, a manual regulating valve and a bleeding valve, wherein the manual gate valve is connected with the pneumatic safety cut-off valve through a conveying pipeline, the pneumatic safety cut-off valve is connected with the pneumatic regulating valve through a pipeline, the pneumatic regulating valve is divided into two pipelines which are respectively connected with the two pipelines, the reversing valve is connected with the manual regulating valve through a pipeline, the manual regulating valve and the bleeding valve are directly provided with a plurality of branch pipelines, and the bleeding valve is communicated with a heat accumulation chamber pipeline, and the method specifically comprises the following:
s1, conveying the semi-coke tail gas to a joint workshop through a pipeline, and dividing the semi-coke tail gas into two branch pipelines through a manual gate valve, a pneumatic emergency cut-off valve and a pneumatic regulating valve;
s2, the branch pipeline can be provided with a plurality of branch pipelines, and each branch pipeline is provided with a manual regulating valve;
s3, sending semi-coke tail gas to a left heat storage chamber and a right heat storage chamber through two branch pipelines, wherein the branch pipelines are respectively provided with a first reversing valve 4 and a second reversing valve 8, one is used, and the two branches are provided with four reversing valves;
s4, reversing once every 20 minutes through the reversing valve;
s5, respectively converging the gas into each gas branch flue after passing through a manual regulating valve, entering a heat storage chamber after passing through a gas branch flue gate plate, and preheating and heating in the heat storage chamber;
s6, finally, burning the semi-coke tail gas in a melting furnace through a small furnace;
the semi-coke tail gas after being cooled twice enters a joint workshop, so that the potential safety hazard of high-temperature gas conveying in a pipeline can be avoided, the semi-coke tail gas is used as gas fuel for glass melting, the emission of the semi-coke tail gas is reduced, and the atmospheric environment is protected; the semi-coke tail gas is cooled to 80-85 ℃ by circulating ammonia water and then cooled to 25 ℃ by a horizontal tube cooler, so that water vapor and partial impurities in the semi-coke tail gas can be effectively removed, the quality of raw gas can be greatly improved, and the heat value of the semi-coke tail gas is increased to 1600kcal/Nm3Thus, the requirements of glass melting can be completely met.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. A method for using semi-coke tail gas to replace producer gas for combustion of a melting furnace of a glass plant is characterized by comprising a manual gate valve, a pneumatic safety cut-off valve, a pneumatic regulating valve, a reversing valve, a manual regulating valve and a bleeding valve, wherein the manual gate valve is connected with the pneumatic safety cut-off valve through a conveying pipeline, the pneumatic safety cut-off valve is connected with the pneumatic regulating valve through a pipeline, the pneumatic regulating valve is divided into two pipelines which are respectively connected with two pipelines, the reversing valve is connected with the manual regulating valve through a pipeline, the manual regulating valve and the bleeding valve are directly provided with a plurality of branch pipelines, and the bleeding valve is communicated with a heat accumulation chamber pipeline; the method specifically comprises the following steps:
s1, conveying the semi-coke tail gas to a joint workshop through a pipeline, and dividing the semi-coke tail gas into two branch pipelines through a manual gate valve, a pneumatic emergency cut-off valve and a pneumatic regulating valve;
s2, the branch pipeline can be provided with a plurality of branch pipelines, and each branch pipeline is provided with a manual regulating valve;
s3, sending semi-coke tail gas to a left heat storage chamber and a right heat storage chamber through two branch pipelines, wherein the branch pipelines are respectively provided with a first reversing valve and a second reversing valve, the two reversing valves act synchronously, and the two branches are provided with four reversing valves;
s4, reversing once every 20 minutes through the reversing valve;
s5, respectively converging the gas into each gas branch flue after passing through a manual regulating valve, entering a heat storage chamber after passing through a gas branch flue gate plate, and preheating and heating in the heat storage chamber;
and S6, finally, feeding the semi-coke tail gas into a melting furnace for combustion through a small furnace.
2. The method for burning the melting furnace of the glass plant by using the semi-coke tail gas instead of the producer gas according to claim 1, wherein the semi-coke tail gas in the S1 is cooled to 80-85 ℃ by circulating ammonia water and then is cooled to 25 ℃ by a horizontal tube cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910954706.4A CN110645805A (en) | 2019-10-09 | 2019-10-09 | Method for burning semi-coke tail gas in melting furnace of glass plant instead of producer gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910954706.4A CN110645805A (en) | 2019-10-09 | 2019-10-09 | Method for burning semi-coke tail gas in melting furnace of glass plant instead of producer gas |
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| CN110645805A true CN110645805A (en) | 2020-01-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1239250A2 (en) * | 2001-03-06 | 2002-09-11 | ANSALDO RICERCHE S.r.l. | Method and system for regenerating energy from the combustion exhaust gas of an industrial furnace, in particular a glass-melting furnace |
| CN102173559A (en) * | 2011-01-14 | 2011-09-07 | 榆林华宝特种玻璃工业有限公司 | Method for melting glass using tail gas in coal low-temperature dry distillation production |
| CN103953920A (en) * | 2014-05-15 | 2014-07-30 | 辽宁向导科技发展有限公司 | Cold crude gas heat accumulating type oxygen-enriched combustion method and cold crude gas heat accumulating type oxygen-enriched combustion system |
| US20180283789A1 (en) * | 2017-03-29 | 2018-10-04 | Hisashi Kobayashi | Reduction of regenerator clogging |
| CN208649234U (en) * | 2018-04-25 | 2019-03-26 | 榆林学院 | Environment-friendly energy-saving coking plant |
-
2019
- 2019-10-09 CN CN201910954706.4A patent/CN110645805A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1239250A2 (en) * | 2001-03-06 | 2002-09-11 | ANSALDO RICERCHE S.r.l. | Method and system for regenerating energy from the combustion exhaust gas of an industrial furnace, in particular a glass-melting furnace |
| CN102173559A (en) * | 2011-01-14 | 2011-09-07 | 榆林华宝特种玻璃工业有限公司 | Method for melting glass using tail gas in coal low-temperature dry distillation production |
| CN103953920A (en) * | 2014-05-15 | 2014-07-30 | 辽宁向导科技发展有限公司 | Cold crude gas heat accumulating type oxygen-enriched combustion method and cold crude gas heat accumulating type oxygen-enriched combustion system |
| US20180283789A1 (en) * | 2017-03-29 | 2018-10-04 | Hisashi Kobayashi | Reduction of regenerator clogging |
| CN208649234U (en) * | 2018-04-25 | 2019-03-26 | 榆林学院 | Environment-friendly energy-saving coking plant |
Non-Patent Citations (1)
| Title |
|---|
| 张智芳: "《兰炭洁净生产概论》", 31 December 2011 * |
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Application publication date: 20200103 |