CN103405988B - Flue-gas-cooling system and method - Google Patents
Flue-gas-cooling system and method Download PDFInfo
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- CN103405988B CN103405988B CN201310274810.1A CN201310274810A CN103405988B CN 103405988 B CN103405988 B CN 103405988B CN 201310274810 A CN201310274810 A CN 201310274810A CN 103405988 B CN103405988 B CN 103405988B
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Abstract
Flue-gas-cooling system of the present invention relates to a kind of for active carbon or active coke dry-method desulfuration adsorption tower flue gas cooling system and method.Its objective is to provide a kind of flue-gas-cooling system and method, the temperature of the flue gas entering adsorption tower can be controlled, avoid active carbon or activated coke to produce hot localised points.Flue-gas-cooling system of the present invention, comprise gas cooler, outer Gas Cooler, first, two temperature sensors and the first fume pipe, one end of first fume pipe is fixedly mounted on the air inlet of adsorption tower, the air inlet of adsorption tower is provided with air flap, the other end of the first fume pipe is communicated with exhaust opening, outer Gas Cooler, gas cooler is installed on the first fume pipe, and gas cooler is between outer Gas Cooler and adsorption tower, first temperature sensor is between outer Gas Cooler and gas cooler, second temperature sensor is between gas cooler and adsorption tower, outer Gas Cooler is provided with can the baffle plate of adjusting air inflow quantity.
Description
Technical field
The present invention relates to desulphurization plant field, particularly relate to a kind of for active carbon or active coke dry-method desulfuration adsorption tower flue gas cooling system and method.
Background technology
Activated coke or Activated Carbon Flue Gas Desulfurization Technology belong to dry type absorption method sulfur removal technology, rely on activated coke or active carbon to the absorption of sulfur dioxide and are parsed flue gas desulfurization circulation.Because activated coke or active carbon have spectral adsorption, this technology can remove multiple harmful substances simultaneously.In sweetening process, substantially do not consume water, do not have waste water, waste residue to produce, there is excellent environmental-protecting performance.Desulfurization product is high-concentration sulfur dioxide gas, can produce the products such as sulfuric acid, sulphur, sulfur dioxide liquid, chemical fertilizer, effectively can alleviate the problem of resource shortage.
When using the adsorption tower with activated coke or active carbon to purify the iron making and sintering technique of iron-smelter for the purpose of metal manufactures, the fossil fuel (coal) of steam power plant, produce in the combustion process of coke or its compound, in the flue gas of discharge, or in the flue gas discharged in industry/life scrap incinerator, during contained pollution sources, because flue gas itself has higher temperature, add flue gas by after blower fan adiabatic compression by post bake, when the flue-gas temperature entering adsorption tower is more than 150 DEG C, the active carbon in adsorption tower or activated coke can be made to produce hot localised points, if flue-gas temperature is continued above 150 DEG C, focus is made to produce fiery point, active carbon or activated coke can continue oxidation, active carbon or activated coke were lost efficacy even burn, thus cause adsorption tower to damage.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of flue-gas-cooling system, can control the temperature of the flue gas entering adsorption tower, avoids the active carbon in adsorption tower or activated coke to produce hot localised points.
Flue-gas-cooling system of the present invention, comprise gas cooler, outer Gas Cooler, first temperature sensor, second temperature sensor and the first fume pipe, one end of first fume pipe is fixedly mounted on the air inlet of adsorption tower, the air inlet of described adsorption tower is provided with air flap, the other end of the first fume pipe is communicated with exhaust opening, described outer Gas Cooler is arranged on the first fume pipe, described gas cooler is also arranged on the first fume pipe, and gas cooler is between outer Gas Cooler and adsorption tower, described first temperature sensor and the second temperature sensor are all installed on the first fume pipe, and the first temperature sensor is between outer Gas Cooler and gas cooler, second temperature sensor is between gas cooler and adsorption tower, the outer gas air inlet of outer Gas Cooler is provided with can the baffle plate of adjusting air inflow quantity.
Flue-gas-cooling system of the present invention, also comprise the second fume pipe, one end of described second fume pipe is connected on the first fume pipe, the junction of the second fume pipe and the first fume pipe is between exhaust opening and outer Gas Cooler, the other end of described second fume pipe is connected with chimney, described second fume pipe is provided with master shield, described first fume pipe is also provided with master shield, the master shield on described first fume pipe is between outer Gas Cooler and first, second fume pipe junction.
Flue-gas-cooling system of the present invention, wherein said gas cooler comprises housing, shower, the upper end of described housing offers air inlet, the lower end of housing offers gas outlet, described shower is arranged in housing, and described shower is provided with some nozzles, and the outlet of nozzle all down, described nozzle can spray water droplet and compressed-air actuated mixture, and the diameter of described water droplet is less than 60 microns.
Flue-gas-cooling system of the present invention, also comprises three-temperature sensor, and three-temperature sensor is arranged in adsorption tower.
Flue-gas-cooling system difference from prior art of the present invention is that the present invention passes through to install gas cooler on the first fume pipe passing into flue gas in adsorption tower, outer Gas Cooler, first temperature sensor, second temperature sensor, the flue-gas temperature entered in the first fume pipe is detected by the first temperature sensor, and by gas cooler and outer Gas Cooler, the flue gas that temperature is too high is cooled, then cooled flue-gas temperature is detected by the second temperature sensor, ensure that the flue gas entered in adsorption tower is no more than the critical-temperature of active carbon or activated coke work, thus can effectively avoid the active carbon in adsorption tower or activated coke to produce hot localised points, active carbon or activated coke is avoided to lose efficacy, burning, damage adsorption tower.
Flue-gas-cooling system of the present invention, by arranging the second fume pipe, when flue gas is after gas cooler and the cooling of outer Gas Cooler, when still exceeding critical-temperature, is directly discharged heat smoke by the second fume pipe, avoiding heat smoke to enter adsorption tower.By arranging nozzle on the shower of gas cooler, water droplet and compressed-air actuated mixture spray downwards by nozzle, cooling water forms the water droplet being less than 60 microns, enter flue gas with the air inlet from upper end to mix, water droplet in mixture can play to the effect of flue gas cool-down, water droplet, while giving flue gas cool-down, evaporates completely after being heated, thus can not form sulfuric acid with oxysulfide chemical combination and cause adsorption tower or smoke conveying duct to be corroded.By installing three-temperature sensor in adsorption tower, the temperature of active carbon or activated coke can be directly detected, avoiding active carbon or activated coke to occur focus.
Another technical problem that the present invention solves is to provide a kind of method using above-mentioned flue-gas-cooling system to cool the flue gas entered in adsorption tower, avoids the active carbon in adsorption tower or activated coke to produce hot localised points.
A kind of flue gas cooling means of the present invention, uses above-mentioned flue-gas-cooling system to cool flue gas, comprises the following steps:
(1) flue gas, is made to enter in adsorption tower from the first fume pipe;
(2), when the flue-gas temperature that the first temperature sensor detects is no more than 150 DEG C, close the outer gas air inlet of outer Gas Cooler, gas cooler does not cool flue gas simultaneously;
(3), when the flue-gas temperature that the first temperature sensor detects is more than 150 DEG C, gas cooler starts, and the flue-gas temperature that the second temperature sensor is detected is no more than 150 DEG C;
(4), when the flue-gas temperature that the second temperature sensor detects is more than 150 DEG C, continue to start gas cooler, and open the air inlet of outer Gas Cooler simultaneously, outer gas is supplemented in the first fume pipe, to flue gas dilution cooling, the flue-gas temperature that the second temperature sensor is detected is no more than 150 DEG C.
Flue gas cooling means of the present invention, in wherein said step (4), by controlling the unlatching size of the baffle plate of outer Gas Cooler air inlet, control the outer gas entering the first fume pipe, the flue-gas temperature that the second temperature sensor is detected is lower than 150 DEG C.
Flue gas cooling means of the present invention, after wherein said gas cooler and outer Gas Cooler are all opened, when the temperature that second temperature sensor detects is more than 150 DEG C, close the master shield on the first fume pipe, open the master shield on the second fume pipe, make flue gas directly enter chimney from the second fume pipe, open outer Gas Cooler simultaneously, close gas cooler, make outer gas enter adsorption tower by the first fume pipe.
Adopt flue gas cooling means of the present invention, can ensure that the flue gas entered in adsorption tower is no more than the critical-temperature of active carbon or activated coke work, thus can effectively avoid the active carbon in adsorption tower or activated coke to produce hot localised points, avoid active carbon or activated coke to lose efficacy, burn, damage adsorption tower.
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of flue-gas-cooling system of the present invention;
Fig. 2 is the structural representation that flue-gas-cooling system of the present invention uses.
Detailed description of the invention
When flue gas enters adsorption tower 7 continuously with the temperature of 150 ° of more than C, in adsorption tower, from certain, active carbon overheats and forms little kindling material, this kindling material starts again other active carbons transferred in module, and this module can be in for a long time cannot carry out adsorbing and the halted state of catalytic activity.Therefore, in order to active carbon keeps its normal best-of-breed functionality below 150 DEG C, and adsorption tower can not reduce running and the efficiency of whole system because of " focus ", need to adopt following system to cool the flue-gas temperature entered in adsorption tower, make it maintain less than 150 DEG C.
As shown in Figure 1, flue-gas-cooling system of the present invention comprises gas cooler 1, outer Gas Cooler 2, first temperature sensor 3, second temperature sensor 4, three-temperature sensor, the first fume pipe 6 and the second fume pipe 9.One end of first fume pipe 6 is fixedly mounted on the air inlet of adsorption tower 7, the air inlet of adsorption tower 7 is provided with air flap, the other end of the first fume pipe 6 is communicated with exhaust opening 8, outer Gas Cooler 2 is arranged on the first fume pipe 6, gas cooler 1 is also arranged on the first fume pipe 6, and gas cooler 1 is between outer Gas Cooler 2 and adsorption tower 7, first temperature sensor 3 and the second temperature sensor 4 are all installed on the first fume pipe 6, and the first temperature sensor 3 is between outer Gas Cooler 2 and gas cooler 1, second temperature sensor 4 is between gas cooler 1 and adsorption tower 7, three-temperature sensor is arranged in adsorption tower 7.The outer gas air inlet of outer Gas Cooler 2 is provided with can the baffle plate of adjusting air inflow quantity.One end of second fume pipe 9 is connected on the first fume pipe 6, the junction of the second fume pipe 9 and the first fume pipe 6 is between exhaust opening 8 and outer Gas Cooler 2, the other end of the second fume pipe 9 is connected with chimney 10, second fume pipe 9 is provided with master shield, first fume pipe 6 is also provided with master shield, and the master shield on described first fume pipe 6 is between outer Gas Cooler 2 and first, second fume pipe 6,9 junction.Gas cooler 1 in the present invention comprises housing, shower, the lower end of housing offers air inlet, the upper end of housing offers gas outlet, and shower is arranged in housing, and the upper end of housing offers air inlet, the lower end of housing offers gas outlet, shower is arranged in housing, shower is provided with some nozzles, and the outlet of nozzle all down, nozzle can spray water droplet and compressed-air actuated mixture, and the diameter of water droplet is less than 60 microns.
A kind of flue gas cooling means of the present invention, uses above-mentioned flue-gas-cooling system to cool flue gas, carries out according to the following step:
1, flue gas is made to enter in adsorption tower 7 from the first fume pipe 6;
2, when the flue-gas temperature detected when the first temperature sensor 3 is no more than 150 DEG C, close the outer gas air inlet of outer Gas Cooler 2, gas cooler 1 does not cool flue gas simultaneously;
3, when the flue-gas temperature that the first temperature sensor 3 detects is more than 150 DEG C, gas cooler 1 starts, and the flue-gas temperature that the second temperature sensor 4 is detected is no more than 150 DEG C;
4, when the flue-gas temperature that the second temperature sensor 4 detects is more than 150 DEG C, continue to start gas cooler, and the air inlet opening outer Gas Cooler 2 supplements outer gas in the first fume pipe 6 simultaneously, to flue gas dilution cooling, the flue-gas temperature that the second temperature sensor 4 is detected is no more than 150 DEG C.
In step 4, by controlling the unlatching size of the baffle plate of outer Gas Cooler 2 air inlet, controlling the outer gas entering the first fume pipe 6, making flue-gas temperature that the second temperature sensor 4 detects lower than 150 DEG C.If after gas cooler 1 and outer Gas Cooler 2 are all opened, when the temperature that second temperature sensor 4 detects still continues 150 DEG C, close the master shield on the first fume pipe 6, open the master shield on the second fume pipe 9, flue gas is made directly to enter chimney 10 from the second fume pipe 9, open outer Gas Cooler 2 simultaneously, close gas cooler 1, make outer gas enter adsorption tower 7 by the first fume pipe 6.
It is the example that application flue-gas-cooling system of the present invention regulates flue-gas temperature in accompanying drawing 2.
For iron-smelter sinter fume, the reason that temperature rises has two kinds, the first, temperature is caused to rise because of equipment operation when doing manual work and raw material condition in sintering machine, the second, the flue gas of being discharged by sintering machine by two pressure fan 13,14 adiabatic compression, causes temperature to rise in the process through precipitator 12 and sack cleaner 11.
Usually, flue-gas temperature is the highest when rising to 150 ° of C, first temperature sensor 3 detects abnormal temperature, gas cooler 1 is dripped by water spray and reduces flue-gas temperature with compressed-air actuated mixture, second temperature sensor 4 confirms, after ensureing that the flue-gas temperature delivered in adsorption tower 7 has dropped to 150 ° of below C, make flue gas through normal fume treatment process.After injection use water is mixed with compressed air in nozzle by the high-pressure delivery pump installed in gas cooler 1, gush out with the water droplet being less than 60 microns by this pressure, and cooled flue gas, then evaporate completely, and the impacts such as adsorption tower 7 or flue gas delivery pipe road are corroded can not be caused.
If when flue-gas-cooling system detects that the flue-gas temperature entering adsorption tower 7 is up to the situation of 200 ° of C, be also cooled to normal temperature by flue-gas-cooling system.This cooling system reduces temperature by gas cooler 1 preliminary (for the first time), and then second time reduces temperature further by outer Gas Cooler 2.
To iron-smelter sinter fume, the intake air temperature condition of native system normally 90 –, 180 ° of C, the highest 200 ° of C during acting.In order to successfully manage different temperature conditions and effectively use this flue-gas-cooling system, use step specific as follows:
Step one: the Cooling Process in the gas cooler 1 of adsorption tower 7 front end.When the temperature that first temperature sensor of adsorption tower 7 front end detects is more than 150 ° of C, as first step, start to spray air-water mixture with the gas cooler 1 of adsorption tower front end.Purpose of design is, by spraying small water droplet, flue-gas temperature is cooled to 150 ° of below C.The change of water consumption and the temperature difference between actual temperature and design temperature proportional.
Step 2: be outer gas dilution that is synchronous with step one, sack cleaner 11 rear end.In gas cooler 1 after spraying cooling procedure, the temperature that second temperature sensor 4 of adsorption tower 7 front end detects but does not lower all the time, in this case, as second step, supplement with the outer Gas Cooler 2 of sack cleaner 11 rear end and carry out outer gas dilution operation.When the temperature that second temperature sensor 4 detects is more than 150 ° of C, externally the air flap of Gas Cooler 2 adjusts, to be introduced outer gas by outer Gas Cooler 2 and to be mixed with flue gas immediately.
Step 3: directly discharge high-temperature flue gas from chimney by the second fume pipe 9, and only permitted in outer gas introducing adsorption tower.After spraying cooling and outer gas dilution; the temperature that adsorption tower front end second temperature sensor 4 detects declines still abundant not; continue to maintain 150 ° of more than C; in this case; need by second fume pipe 9 in sack cleaner 11 front, high-temperature flue gas directly to be discharged from chimney; and only permitted outer gas introduce in adsorption tower 7 by outer Gas Cooler 2, to protect adsorption tower not damaged.
Step 4: return to normal operation.When the temperature that adsorption tower front end second temperature sensor 4 detects is lower than 150 ° of C, bypass mode of operation will return to normal operation mode.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (6)
1. a flue gas cooling means, flue-gas-cooling system is used to cool flue gas, this flue-gas-cooling system comprises gas cooler (1), outer Gas Cooler (2), first temperature sensor (3), second temperature sensor (4) and the first fume pipe (6), one end of described first fume pipe (6) is fixedly mounted on the air inlet of adsorption tower (7), the air inlet of described adsorption tower (7) is provided with air flap, the other end of the first fume pipe (6) is communicated with exhaust opening (8), described outer Gas Cooler (2) is arranged on the first fume pipe (6), described gas cooler (1) is also arranged on the first fume pipe (6), and gas cooler (1) is positioned between outer Gas Cooler (2) and adsorption tower (7), described first temperature sensor (3) and the second temperature sensor (4) are all installed on the first fume pipe (6), and the first temperature sensor (3) is positioned between outer Gas Cooler (2) and gas cooler (1), second temperature sensor (4) is positioned between gas cooler (1) and adsorption tower (7), the outer gas air inlet of described outer Gas Cooler (2) is provided with can the baffle plate of adjusting air inflow quantity, it is characterized in that, use described flue-gas-cooling system to carry out cooling to flue gas to comprise the following steps:
(1) flue gas, is made to enter in adsorption tower (7) from the first fume pipe (6);
(2), when the flue-gas temperature that the first temperature sensor (3) detects is no more than 150 DEG C, close the outer gas air inlet of outer Gas Cooler (2), gas cooler (1) does not cool flue gas simultaneously;
(3), when the flue-gas temperature that the first temperature sensor (3) detects is more than 150 DEG C, gas cooler (1) starts, and the flue-gas temperature that the second temperature sensor (4) is detected is no more than 150 DEG C;
(4), when the flue-gas temperature that the second temperature sensor (4) detects is more than 150 DEG C, continue to start gas cooler (1), and open outer Gas Cooler (2) air inlet supplementary outer gas in the first fume pipe (6) simultaneously, to flue gas dilution cooling, the flue-gas temperature that the second temperature sensor (4) is detected is no more than 150 DEG C.
2. flue gas cooling means according to claim 1, it is characterized in that: described flue-gas-cooling system also comprises the second fume pipe (9), one end of described second fume pipe (9) is connected on the first fume pipe (6), the junction of the second fume pipe (9) and the first fume pipe (6) is positioned between exhaust opening (8) and outer Gas Cooler (2), the other end of described second fume pipe (9) is connected with chimney (10), described second fume pipe (9) is provided with master shield, described first fume pipe (6) is also provided with master shield, master shield on described first fume pipe (6) is positioned at outer Gas Cooler (2) and first, second fume pipe (6, 9) between junction.
3. flue gas cooling means according to claim 2, it is characterized in that: in described step (4), by controlling the unlatching size of the baffle plate of outer Gas Cooler (2) air inlet, control the outer gas entering the first fume pipe (6), make flue-gas temperature that the second temperature sensor (4) detects lower than 150 DEG C.
4. flue gas cooling means according to claim 3, it is characterized in that: after described gas cooler (1) and outer Gas Cooler (2) are all opened, when the temperature that second temperature sensor (4) detects is more than 150 DEG C, close the master shield on the first fume pipe (6), open the master shield on the second fume pipe (9), flue gas is made directly to enter chimney (10) from the second fume pipe (9), open outer Gas Cooler (2) simultaneously, close gas cooler (1), outer gas is made to enter adsorption tower (7) by the first fume pipe (6).
5. flue gas cooling means according to claim 4, it is characterized in that: described gas cooler (1) comprises housing, shower, the upper end of described housing offers air inlet, the lower end of housing offers gas outlet, described shower is arranged in housing, and described shower is provided with some nozzles, and the outlet of described nozzle all down, described nozzle can spray water droplet and compressed-air actuated mixture, and the diameter of described water droplet is less than 60 microns.
6. flue gas cooling means according to claim 5, it is characterized in that: described flue-gas-cooling system also comprises three-temperature sensor, described three-temperature sensor is arranged in adsorption tower (7).
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| CN201310274810.1A CN103405988B (en) | 2013-07-02 | 2013-07-02 | Flue-gas-cooling system and method |
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| CN107561222B (en) * | 2017-09-30 | 2024-04-19 | 浙江力聚热能装备股份有限公司 | Flue gas analysis device |
| CN108671698A (en) * | 2018-05-13 | 2018-10-19 | 湖南钜晟环保科技工程有限公司 | A kind of exhaust gas adsorption box |
| CN109157974A (en) * | 2018-10-23 | 2019-01-08 | 上海克硫环保科技股份有限公司 | A kind of cooling protection system and method being applicable in activated coke dry method |
| CN110538620B (en) * | 2018-11-14 | 2021-10-15 | 北京北方华创微电子装备有限公司 | Pressure control system and pressure control method of reaction chamber |
| EP3887056A4 (en) * | 2018-11-27 | 2022-10-12 | VortX Kleanair Systems | Temperature controlled exhaust stream water filter for coffee roasters |
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