CN102382932B - Gas cooling technology used for dry dedusting for converter gas - Google Patents
Gas cooling technology used for dry dedusting for converter gas Download PDFInfo
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Abstract
The invention relates to a gas cooling technology used for dry dedusting for converter gas. The gas cooling technology used for dry dedusting for converter gas is characterized by comprising the following steps that: 1) smoke gas of 160 DEG C enters into a cylinder body of a gas cooler through an inlet smoke gas pipe and is precooled by using liquid drop of atomized cooling water of a precooling spraying gun installed on the inlet smoke gas pipe; 2) the smoke gas moves upward after entering into the cylinder body of the gas cooler and is subjected to contact type heat exchange with the small atomized cooling liquid drop sprayed out from an upper-layer spraying gun and a lower-layer spraying gun, and the upper-layer spraying gun and the lower-layer spraying gun are arranged in the cylinder body of the gas cooler; 3) after the heat exchange, the smoke gas is exhausted from the inlet smoke gas pipe, and the cooling water subjected to contact type heat exchange is deposited downward to a conical water storage tank; 4) when the water level of the conical water storage tank reaches a high level, the cooling water in the conical water storage tank is drained through a U-shaped overflow water seal drain pipe, and a water replenishing pipe is arranged at the top of the U-shaped overflow water seal drain pipe. Due to the adoption of the direct contact type evaporative cooling heat exchange, the smoke gas of 160 DEG C can be cooled to 70 DEG C required by the gas temperature, so that the power of a water supply pump is reduced, and the gas is prevented from leaking outside.
Description
Technical field
The present invention relates to a kind of gas cooling technology used for dry dedusting for converter gas.
Background technology
In converter gas dry-dedusting system, need recycle for the coal gas that meets recovering condition.It is 70 ℃ that the gas temperature of gas chamber entrance requires, and the gas temperature at fan outlet place is about 160 ℃, therefore needs gas cooler that coal gas is lowered the temperature, so that gas chamber can store coal gas as much as possible; In addition because coal gas toxic is the safety that guarantees the operation maintainer, need that coal gas can not leak as far as possible in the assurance system.Simultaneously in order to prolong the work-ing life of gas chamber, need to coal gas further purify, dedusting.
Summary of the invention
The object of the present invention is to provide a kind of gas cooling technology used for dry dedusting for converter gas, this technique can be cooled off coal gas, avoids coal gas to leak outside.
To achieve these goals, technical scheme of the present invention is: gas cooling technology used for dry dedusting for converter gas is characterized in that it comprises the steps:
During the converter gas dry-dedusting system normal operation:
1) temperature is that 160 ℃ coal gas (flue gas) enters in the gas cooler cylindrical shell 2 through inlet flue gas pipe 1, and the pre-cooled spray gun 22 atomization water coolant drops of installing at inlet flue gas pipe 1 carry out pre-cooled to flue gas (coal gas);
2) flue gas enters upwards operation in the gas cooler cylindrical shell 2, and the atomization cooling water small droplets that sprays with the upper strata spray gun 12 of arranging in the gas cooler cylindrical shell, lower floor's spray gun 10 carries out the contact heat exchange;
3) heat exchange complete after, flue gas is discharged through outlet flue 13; The water coolant that carries out after the contact heat exchange is deposited into tapered water tank 3 (bottom of gas cooler cylindrical shell is tapered water tank 3) downwards;
4) when arriving a high position, the water level in the tapered water tank 3 discharges through U-shaped overflow water seal water shoot 5, filling pipe 6 is equipped with at the top of U-shaped overflow water seal water shoot 5, incessantly toward the interior moisturizing (water seal) of U-shaped overflow water seal water shoot, guarantee to remain at full liquid level in the water seal, so that gas cooler 2 interior coal gas are not revealed;
5) cooling water of upper strata spray gun 12 is supplied water by outside mechanical water pump, and lower floor's spray gun 10 is by top water tank 18 gravity water supplies; Upper strata spray gun 12 accounts for 55% (quality) of total cooling water flow, and lower floor's spray gun 10 and pre-cooled spray gun 22 account for 45% of total cooling water inflow;
6) when gas cooler is not worked, close the total valve of the water supply line of upper strata spray gun and lower floor's spray gun, outside water supply only supplied water to top water tank 18, when surpassing top water tank 18 high liquid level, stops to supply water;
During the converter gas dry-dedusting system stop production to overhaul:
1) the second compressed nitrogen tracheae 15 of top water tank 18 and the valve on the second compressed air pipe 14 are opened respectively, and with the valve open of the bleeder 17 at gas cooler top;
2) the first compressed nitrogen tracheae 8 on the tapered water tank 3 and the valve on the first compressed air pipe 7 are opened respectively; In with converter gas dry-dedusting system, just can enter the internal overhaul of the gas cooler cylindrical shell 2 of gas cooler behind the remaining coal gas emptying;
3) with the valve open on the wash tub pipe 9 on the tapered water tank 3, and with the valve open on the drainage for overhaul pipe 4, tapered water tank 3 is cleaned.
The invention has the beneficial effects as follows: adopt the transpiration cooling heat exchange (comprising pre-cooled) of direct contact type, 160 ℃ coal gas (being flue gas) can be cooled to the gas temperature requirement is 70 ℃, can make the water supply pump power reduction, avoids coal gas to leak outside.Can guarantee kind of dust≤15mg/Nm
3(far below the national requirements emission standard).
Description of drawings
Fig. 1 is process flow sheet of the present invention;
Among the figure: 1-inlet flue gas pipe, 2-gas cooler cylindrical shell, the tapered water tank of 3-, 4-drainage for overhaul pipe, 5-U shape overflow water seal water shoot, the 6-filling pipe, 7-the first compressed air pipe, 8-the first compressed nitrogen tracheae, the 9-wash tub pipe, 10-lower floor spray gun, 11-upper strata spray gun water-supply pipe, 12-upper strata spray gun, 13-exports flue, 14-the second compressed air pipe, 15-the second compressed nitrogen tracheae, 16-upper tank water-supply pipe, the 17-bleeder, 18-top water tank, 19-upper strata endless tube, 20-lower floor spray gun water-supply pipe, 21-lower floor endless tube, the pre-cooled spray gun of 22-.
Embodiment
In order to understand better the present invention, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
As shown in Figure 1, gas cooling technology used for dry dedusting for converter gas, it comprises the steps:
During the converter gas dry-dedusting system normal operation:
1) temperature is that 160 ℃ coal gas (flue gas) enters in the gas cooler cylindrical shell 2 through inlet flue gas pipe 1 behind cup valve switching station (being a glass valve switching station before the gas cooler) of converter gas dry-dedusting system, and the pre-cooled spray gun 22 atomization water coolant drops of installing at inlet flue gas pipe 1 carry out pre-cooled to flue gas;
2) flue gas enters upwards operation in the gas cooler cylindrical shell 2, and the atomization cooling water small droplets that sprays with the upper strata spray gun 12 of arranging in the gas cooler cylindrical shell, lower floor's spray gun 10 carries out the contact heat exchange;
3) heat exchange complete after, flue gas is discharged through outlet flue 13; The water coolant that carries out after the contact heat exchange is deposited into tapered water tank 3 (bottom of gas cooler cylindrical shell is tapered water tank 3) downwards;
4) when arriving a high position, the water level in the tapered water tank 3 discharges through U-shaped overflow water seal water shoot 5, filling pipe 6 is equipped with at the top of U-shaped overflow water seal water shoot 5, incessantly toward the interior moisturizing (water seal) of U-shaped overflow water seal water shoot, guarantee to remain at full liquid level in the water seal, so that gas cooler 2 interior coal gas are not revealed;
5) cooling water of upper strata spray gun 12 is supplied water by outside mechanical water pump, and lower floor's spray gun 10 is by top water tank 18 gravity water supplies; Upper strata spray gun 12 accounts for 55% (quality) of total cooling water flow, and lower floor's spray gun 10 and pre-cooled spray gun 22 account for 45% of total cooling water inflow;
6) when gas cooler is not worked, close the total valve of the water supply line of upper strata spray gun and lower floor's spray gun, outside water supply only supplied water to top water tank 18, when surpassing top water tank 18 high liquid level, stops to supply water;
During the converter gas dry-dedusting system stop production to overhaul:
1) the second compressed nitrogen tracheae 15 of top water tank 18 and the valve on the second compressed air pipe 14 are opened respectively, and with the valve open of the bleeder 17 at gas cooler top;
2) the first compressed nitrogen tracheae 8 on the tapered water tank 3 and the valve on the first compressed air pipe 7 are opened respectively; In with converter gas dry-dedusting system, just can enter the internal overhaul of the gas cooler cylindrical shell 2 of gas cooler behind the remaining coal gas emptying;
3) with the valve open on the wash tub pipe 9 on the tapered water tank 3, and with the valve open on the drainage for overhaul pipe 4, tapered water tank 3 is cleaned.
Realize the coal gas cooling equipment for converter coal gas dry dedusting of above-mentioned technique, as shown in Figure 1, it comprises gas cooler, inlet flue gas pipe 1, outlet flue 13, pre-cooled spray gun 22; The outlet end of inlet flue gas pipe 1 inserts in the gas cooler cylindrical shell 2 of gas cooler, the outlet end of inlet flue gas pipe 1 is positioned at the bottom (and oblique 45 °) of gas cooler cylindrical shell 2 downwards, inlet flue gas pipe 1 is provided with pre-cooled spray gun 22, the nozzle of pre-cooled spray gun 22 is positioned at inlet flue gas pipe 1, pre-cooled spray gun 22 is connected (also can directly be connected with top water tank 18) with lower floor spray gun water-supply pipe 20 by pre-cooled water pipe, and pre-cooled water pipe is provided with valve; The top of gas cooler cylindrical shell 2 is connected with outlet flue 13;
Gas cooler comprises gas cooler cylindrical shell 2, lower floor's spray gun 10, upper strata spray gun 12, top water tank 18; The bottom of gas cooler cylindrical shell 2 is tapered water tank 3, and the bottom of tapered water tank 3 is connected with drainage for overhaul pipe 4, and the top sidewall of tapered water tank 3 is connected with U-shaped overflow water seal water shoot 5, and filling pipe 6 is equipped with at the top of shape overflow water seal water shoot 5; The first compressed air pipe 7, the first compressed nitrogen tracheae 8 and wash tub pipe 9 are connected with tapered water tank 3 respectively when guaranteeing maintenance (establish the first compressed air pipe 7, the first compressed nitrogen tracheae 8 and be for personal security), are respectively equipped with valve on the first compressed air pipe 7, the first compressed nitrogen tracheae 8 and the wash tub pipe 9; Middle and upper part in the gas cooler cylindrical shell 2 is provided with lower floor's spray gun 10 and the upper strata spray gun 12 for cooled flue gas, and upper strata spray gun 12 is positioned at the top of lower floor's spray gun 10; Top in the gas cooler cylindrical shell 2 is provided with top water tank 18, the second compressed air pipe 14, the second compressed nitrogen tracheae 15 and upper tank water-supply pipe 16 (mechanical water pump water supply) are connected with top water tank 18 respectively when guaranteeing maintenance (establish the second compressed air pipe 14, the second compressed nitrogen tracheae 15 and be for personal security), are respectively equipped with valve on the second compressed air pipe 14, the second compressed nitrogen tracheae 15 and the upper tank water-supply pipe 16; Lower floor's spray gun 10 is connected with lower floor endless tube 21, and (lower floor's spray gun 10 is for a plurality of, such as 2-100), lower floor's endless tube 21 is positioned at outside the gas cooler cylindrical shell 2, lower floor's endless tube 21 is connected with top water tank 18 (by gravity water supply) by lower floor's spray gun water-supply pipe 20, and lower floor's spray gun water-supply pipe 20 is provided with valve; Upper strata spray gun 12 is connected with upper strata endless tube 19, and (upper strata spray gun 12 is for a plurality of, such as 2-100), upper strata endless tube 19 is positioned at outside the gas cooler cylindrical shell 2, upper strata endless tube 19 is connected with upper strata spray gun water-supply pipe 11 (upper strata spray gun 12 supplies water by machine water pump tool), and upper strata spray gun water-supply pipe 11 is provided with valve; The top of gas cooler cylindrical shell 2 is connected with bleeder 17, and bleeder 17 is provided with diffusion valve.
Claims (1)
1. gas cooling technology used for dry dedusting for converter gas is characterized in that it comprises the steps:
During the converter gas dry-dedusting system normal operation:
1) temperature is that 160 ℃ coal gas enters in the gas cooler cylindrical shell (2) through inlet flue gas pipe (1), carries out pre-cooled at pre-cooled spray gun (22) the atomization water coolant drop of inlet flue gas pipe (1) installation to flue gas;
2) flue gas enters upwards operation in the gas cooler cylindrical shell (2), and the atomization cooling water small droplets that sprays with the upper strata spray gun (12) of arranging in the gas cooler cylindrical shell, lower floor's spray gun (10) carries out the contact heat exchange;
3) heat exchange complete after, flue gas is discharged through outlet flue (13); The water coolant that carries out after the contact heat exchange is deposited into tapered water tank (3) downwards;
4) when arriving a high position, the water level in the tapered water tank (3) discharges through U-shaped overflow water seal water shoot (5), filling pipe (6) is equipped with at the top of U-shaped overflow water seal water shoot (5), incessantly toward the interior moisturizing of U-shaped overflow water seal water shoot, guarantee to remain at full liquid level in the water seal, so that the interior coal gas of gas cooler (2) is not revealed;
5) cooling water of upper strata spray gun (12) is supplied water by outside mechanical water pump, and lower floor's spray gun (10) is by top water tank (18) gravity water supply; The flow of upper strata spray gun (12) accounts for 55 % of total cooling water flow, and the flow of lower floor's spray gun (10) and pre-cooled spray gun (22) accounts for 45% of total cooling water inflow;
6) when gas cooler is not worked, close the total valve of the water supply line of upper strata spray gun and lower floor's spray gun, outside water supply only supplied water to top water tank (18), when surpassing the high liquid level of top water tank (18), stops to supply water;
During the converter gas dry-dedusting system stop production to overhaul:
1) the second compressed nitrogen tracheae (15) of top water tank (18) and the valve on the second compressed air pipe (14) are opened respectively, and with the valve open of the bleeder (17) at gas cooler top; The second compressed air pipe (14), the second compressed nitrogen tracheae (15) and upper tank water-supply pipe (16) are connected with top water tank (18) respectively;
2) the first compressed nitrogen tracheae (8) on the tapered water tank (3) and the valve on the first compressed air pipe (7) are opened respectively; In with converter gas dry-dedusting system, just can enter the internal overhaul of the gas cooler cylindrical shell (2) of gas cooler behind the remaining coal gas emptying; The first compressed air pipe (7), the first compressed nitrogen tracheae (8) and wash tub pipe (9) are connected with tapered water tank (3) respectively;
3) with the valve open on the wash tub pipe (9) on the tapered water tank (3), and with the valve open on the drainage for overhaul pipe (4), tapered water tank (3) is cleaned.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110338320 CN102382932B (en) | 2011-10-31 | 2011-10-31 | Gas cooling technology used for dry dedusting for converter gas |
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| CN 201110338320 CN102382932B (en) | 2011-10-31 | 2011-10-31 | Gas cooling technology used for dry dedusting for converter gas |
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| CN102382932A CN102382932A (en) | 2012-03-21 |
| CN102382932B true CN102382932B (en) | 2013-05-01 |
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| CN113337667B (en) * | 2021-06-28 | 2022-04-12 | 广东韶钢松山股份有限公司 | Dry dedusting evaporative cooler, dedusting system and dedusting process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201148417Y (en) * | 2007-12-26 | 2008-11-12 | 北京博鹏北科科技有限公司 | Spray evaporation cooling dust removing apparatus of converter gas purification system |
| CN101352636A (en) * | 2007-07-25 | 2009-01-28 | 宋会江 | Technique for purifying converter gas and removing dust |
| CN101875993A (en) * | 2010-07-30 | 2010-11-03 | 中冶南方工程技术有限公司 | System for removing dust from converter gas by dry method and using method thereof |
| CN101892343A (en) * | 2010-07-30 | 2010-11-24 | 中冶南方工程技术有限公司 | Converter gas dry-dedusting system and using method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5540658B2 (en) * | 2009-11-11 | 2014-07-02 | Ｊｆｅスチール株式会社 | Thermal energy recovery method for exhaust gas generated from metallurgical furnace |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352636A (en) * | 2007-07-25 | 2009-01-28 | 宋会江 | Technique for purifying converter gas and removing dust |
| CN201148417Y (en) * | 2007-12-26 | 2008-11-12 | 北京博鹏北科科技有限公司 | Spray evaporation cooling dust removing apparatus of converter gas purification system |
| CN101875993A (en) * | 2010-07-30 | 2010-11-03 | 中冶南方工程技术有限公司 | System for removing dust from converter gas by dry method and using method thereof |
| CN101892343A (en) * | 2010-07-30 | 2010-11-24 | 中冶南方工程技术有限公司 | Converter gas dry-dedusting system and using method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2011-102421A 2011.05.26 |
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