CN212651580U - Colored smoke plume governing system of cement plant kiln tail flue gas - Google Patents

Abstract

The utility model provides a colored plume governing system of cement plant kiln tail flue gas, include absorption tower, flue gas condenser, defroster, gas-wind blender and the chimney that sets gradually according to the flue gas flow direction, still include rotary kiln, rotary kiln air-cooled cover, dust remover and the air-blower that sets gradually according to hot-blast flow direction, the outside of rotary kiln is set up to rotary kiln air-cooled cover for absorb the heat of rotary kiln casing, the hot-blast back that removes dust through the dust remover of rotary kiln air-cooled cover collection, through the air-blower is sent to gas-wind blender and flue gas and is mixed, the export of gas-wind blender with the bottom of chimney links to each other. The mud factory rotary kiln tail flue gas is desulfurized through the absorption tower and then is subjected to condensation dehumidification cooling treatment, a large amount of water in the flue gas can be recycled, and the flue gas is diluted and heated through the hot air of the flue gas-air mixer and then is discharged, so that the phenomenon of white smoke can be effectively reduced or eliminated, and the problem of difficulty in source taking of a flue gas heating heat source is solved.

Description

Colored smoke plume governing system of cement plant kiln tail flue gas

[ technical field ] A method for producing a semiconductor device

The utility model relates to a technical field that the colored plume of building materials trade purifies, especially a colored plume governing system of cement plant kiln tail flue gas.

[ background of the invention ]

The method comprises the steps of dedusting the flue gas at the tail of the cement kiln, then carrying out wet desulphurization, carrying out wet saturation on the treated flue gas, wherein the temperature of the flue gas is generally 50-60 ℃, and if the flue gas is directly discharged without treatment, because the saturated wet flue gas is rapidly cooled after contacting with ambient air, the gaseous water in the wet flue gas is rapidly condensed into liquid water drops, thereby forming white smoke plume.

In order to eliminate white smoke plume, a condensation and heating mode is generally adopted to reduce the humidity of smoke, increase the temperature of the smoke and reduce or eliminate the generation of white smoke, water vapor in the smoke can be condensed to generate a large amount of condensed water in the saturated wet smoke in the cooling process, and the condensed water can be recycled after being collected.

Heating flue gas needs a large amount of heat sources, most heat sources are recycled in the cement production process, the heat of the kiln tail flue gas of the rotary kiln and the heat generated by cooling clinker are generally utilized by a waste heat boiler, if the kiln tail flue gas of the rotary kiln is adopted as the heat source, a complex flue system needs to be arranged, the original cement production process can be influenced, if the steam of the waste heat boiler is adopted as the heat source, the generated energy of the waste heat boiler can be seriously influenced, and meanwhile, the normal operation of the waste heat boiler can also be influenced.

[ Utility model ] content

The utility model aims at solving the problem among the prior art, provide a colored plume governing system of cement plant kiln tail flue gas, under the condition that does not consume a large amount of usable heat energy, can effectively solve the phenomenon of the white plume of cement kiln tail flue gas, a large amount of water in the recycle flue gas simultaneously gets rid of remaining pollutant in the flue gas, accomplishes energy-conservation, water conservation and emission reduction.

In order to achieve the purpose, the utility model provides a cement plant kiln tail flue gas colored smoke plume governing system, which comprises an absorption tower, a flue gas condenser, a demister, a flue gas mixer and a chimney which are arranged in sequence according to the flow direction of flue gas, wherein the flue gas condenser is arranged between the absorption tower and the demister, the outlet of the demister is connected with the flue gas mixer, the cement plant kiln tail flue gas colored plume governing system also comprises a rotary kiln, a rotary kiln air cooling cover, a dust remover and an air blower which are arranged in sequence according to the flow direction of hot air, the rotary kiln air cooling cover is arranged at the outer side of the rotary kiln and is used for absorbing the heat of a rotary kiln shell, the outlet of the rotary kiln air cooling cover is connected with the air blower through the dust remover, the outlet of the air blower is connected with the flue gas mixer, the hot air collected by the rotary kiln air cooling cover is deduste, and the outlet of the smoke and air mixer is connected with the bottom of the chimney.

Preferably, the flue gas condenser condenses by adopting a dividing wall heat exchange or direct spraying condensation mode, water vapor in saturated wet flue gas can be condensed and separated out in the condensation process, a large amount of generated condensed water can be recycled, and a flue gas demister is arranged at an outlet of the flue gas condenser.

Preferably, the lower parts of the flue gas condenser and the demister are connected with a condensate water recovery device, and the condensate water recovery device is used for collecting and recycling condensate water removed by the flue gas condenser and the demister.

Preferably, the rotary kiln air cooling cover is arranged on the surface of a shell of the rotary kiln, ambient air is sucked through negative pressure, cold air absorbs heat of the shell to form hot air when passing through the rotary kiln shell, the hot air absorbed by the rotary kiln air cooling cover is dedusted by a deduster and then is sent to a smoke air mixer to be mixed with smoke, so that the temperature of the smoke is increased, the humidity is reduced, and the phenomenon of white smoke is effectively reduced or eliminated.

Preferably, the smoke and air mixers are provided with hot air inlets and smoke inlets, the hot air inlets are connected with outlets of the air blowers, and the smoke inlets are connected with outlets of the demisters.

Preferably, the smoke and air mixer is made of a corrosion-resistant and high-temperature-resistant material and adopts a multi-point injection mode.

The utility model has the advantages that: the saturated wet flue gas at the outlet of the absorption tower can recycle a large amount of water in the flue gas in the condensation process, and can remove partial pollutants to play a role in saving water; the cold air cover of the rotary kiln absorbs ambient air through negative pressure, the cold air absorbs heat of the shell when passing through the shell of the rotary kiln, the heated ambient air is blown into flue gas by an air blower after passing through a dust remover to be fully mixed with the flue gas, so that the temperature of the flue gas is increased, the humidity is reduced, and the phenomenon of white smoke is effectively reduced or eliminated; after the rotary kiln is provided with the cold air cover, the heat of the shell of the rotary kiln can be effectively absorbed, the problem that a heat source is difficult to take by heating flue gas is solved, and the safe operation of equipment is enhanced.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic structural view of a system for treating colored smoke plume in exhaust gas from a kiln tail of a cement kiln.

[ detailed description ] embodiments

Referring to fig. 1, an embodiment of the colored plume treatment system for the flue gas at the kiln tail of the cement plant of the present invention comprises an absorption tower 7, a flue gas condenser 8, a demister 9, a flue gas-air mixer 5 and a chimney 6 which are sequentially arranged according to the flow direction of the flue gas, wherein the flue gas condenser 8 is arranged between the absorption tower 7 and the demister 9, the outlet of the demister 9 is connected with the flue gas-air mixer 5, the system further comprises a rotary kiln 1, a rotary kiln air cooling cover 2, a dust remover 3 and an air blower 4 which are sequentially arranged according to the flow direction of the hot air, the rotary kiln air cooling cover 2 is arranged at the outer side of the rotary kiln 1 for absorbing the heat of the shell of the rotary kiln 1, the outlet of the rotary kiln air cooling cover 2 is connected with the air blower 4 through the dust remover 3, the outlet of the air blower 4 is connected with the flue gas-air mixer 5, the flue gas is sent to a flue gas and air mixer 5 through the air blower 4 and is fully mixed with the flue gas, and the outlet of the flue gas and air mixer 5 is connected with the bottom of the chimney 6.

Further, the flue gas condenser 8 adopts a dividing wall heat exchange or direct spraying condensation mode for condensation, water vapor in saturated wet flue gas can be condensed out in the condensation process, a large amount of generated condensed water can be recycled, and a flue gas demister 9 is arranged at an outlet of the flue gas condenser 8.

Further, the flue gas condenser 8 and the lower part of the demister 9 are connected with a condensate water recovery device, and the condensate water recovery device is used for collecting and recycling condensate water removed by the flue gas condenser 8 and the demister 9.

Furthermore, the rotary kiln air cooling cover 2 is arranged on the surface of the shell of the rotary kiln 1, ambient air is sucked through negative pressure, cold air absorbs heat of the shell when passing through the shell of the rotary kiln 1 to form hot air, the hot air absorbed by the rotary kiln air cooling cover 2 is dedusted by the deduster 3 and then is sent to the smoke air mixer 5 by the air blower 4 to be fully mixed with smoke, so that the temperature of the smoke is increased, the humidity is reduced, and the phenomenon of white smoke is effectively reduced or eliminated.

Furthermore, the flue gas-air mixer 5 is provided with a hot air inlet and a flue gas inlet, the hot air inlet is connected with an outlet of the air blower 4, the flue gas inlet is connected with an outlet of the demister 9, and the flue gas-air mixer 5 is made of corrosion-resistant and high-temperature-resistant materials and adopts a multi-point injection mode.

The flue gas of the rotary kiln 1 after being dedusted by the deduster 3 enters an absorption tower 7 for desulfurization treatment, the desulfurization process generally adopts wet desulfurization, and limestone slurry is adopted for spraying and absorbing SO in the flue gas₂When the acid gas is in a wet saturation state, the temperature of the clean flue gas at the outlet of the absorption tower 7 is generally between 50 ℃ and 60 ℃, the clean flue gas in the wet saturation state enters the flue gas condenser 8 for cooling and dehumidifying treatment, the saturated wet flue gas can be condensed and separated out a large amount of water in the temperature reduction process, and the condensed water has high quality and can be recycled as circulating water or other purposes, so that the effect of saving water is achieved. The cold source medium of the flue gas condenser 8 can be water or other medium, and the condensed clean flue gas enters the demister 9 to remove most of fog drops. The flue gas after cooling and dehumidification can effectively reduce the humidity of the flue gas, a large amount of condensed water is recycled, partial pollutants can be removed, and the flue gas plays an important role in eliminating white smoke.

In the normal operation process, the surface temperature of the shell of the rotary kiln 1 for calcining cement clinker is higher and can reach more than 300 ℃, and heat insulation treatment cannot be carried out, so that a large amount of heat is wasted in the daily operation process, and a great deal of potential safety hazard is brought to daily maintenance. After a rotary kiln air cooling cover 2 is arranged on the surface of a shell of a rotary kiln 1, ambient air is sucked through negative pressure, cold air absorbs heat of the shell when passing through the shell of the rotary kiln 1 to form hot air, the hot air enters a dust remover 3 for dust removal treatment, the concentration of dust discharged by flue gas meets the environmental protection requirement, the hot air after dust removal is blown into a flue gas and air mixer 5 by an air blower 4 to be fully mixed with the flue gas, the flue gas and air mixer 5 is made of an anti-corrosion material and adopts a multi-point injection mode, and uniform mixing is ensured; after the flue gas and the hot air are mixed, the temperature of the flue gas is increased, the humidity is reduced, the mixed flue gas is finally discharged from a chimney, and the phenomenon of white smoke can be effectively reduced or eliminated after the flue gas in the rotary kiln 1 is condensed, diluted and heated.

During operation, the kiln tail flue gas of the rotary kiln of the cement plant is desulfurized by the absorption tower and then is subjected to condensation dehumidification cooling treatment, a large amount of water in the flue gas can be recycled and discharged after being diluted and heated by hot air of the flue gas-air mixer, and the phenomenon of white smoke can be effectively reduced or eliminated. The problem of the difficult circumstances of getting the source of flue gas heating heat source is solved, and the rotary kiln arranges rotary kiln cooling device after, has carried out effective recovery to its heat, has strengthened the safe operation of equipment simultaneously.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims (6)

1. The utility model provides a cement plant kiln tail flue gas colored plume governing system which characterized in that: comprises an absorption tower (7), a flue gas condenser (8), a demister (9), a flue gas-air mixer (5) and a chimney (6) which are sequentially arranged according to the flowing direction of flue gas, wherein the flue gas condenser (8) is arranged between the absorption tower (7) and the demister (9), the outlet of the demister (9) is connected with the flue gas-air mixer (5), the rotary kiln (1), a rotary kiln air cooling cover (2), a dust remover (3) and an air blower (4) which are sequentially arranged according to the flowing direction of hot air are also included, the rotary kiln air cooling cover (2) is arranged at the outer side of the rotary kiln (1) and is used for absorbing the heat of the shell of the rotary kiln (1), the outlet of the rotary kiln air cooling cover (2) is connected with the air blower (4) through the dust remover (3), the outlet of the air blower (4) is connected with the flue gas-air mixer (5), and the hot air collected by the rotary kiln air cooling, the flue gas is sent to a flue gas and air mixer (5) through the air blower (4) and is mixed with the flue gas, and the outlet of the flue gas and air mixer (5) is connected with the bottom of the chimney (6).

2. The system for treating the colored smoke plume of the kiln tail flue gas of the cement plant as claimed in claim 1, wherein: the flue gas condenser (8) adopts a dividing wall heat exchange or direct spraying condensation mode to carry out condensation, and a flue gas demister (9) is arranged at an outlet of the flue gas condenser (8).

3. The system for treating the colored smoke plume of the kiln tail flue gas of the cement plant as claimed in claim 1, wherein: the flue gas condenser (8) and the lower part of the demister (9) are connected with a condensate water recovery device, and the condensate water recovery device is used for collecting and recycling condensate water removed by the flue gas condenser (8) and the demister (9).

4. The system for treating the colored smoke plume of the kiln tail flue gas of the cement plant as claimed in claim 1, wherein: the rotary kiln air cooling cover (2) is arranged on the surface of a shell of the rotary kiln (1), ambient air is sucked through negative pressure, cold air absorbs heat of the shell when passing through the shell of the rotary kiln (1) to form hot air, the hot air absorbed by the rotary kiln air cooling cover (2) is dedusted by a deduster (3) and then is sent to a smoke air mixer (5) to be mixed with smoke, and the smoke temperature of the cement kiln is increased.

5. The system for treating the colored smoke plume of the kiln tail flue gas of the cement plant as claimed in claim 1, wherein: the flue gas-air mixer (5) is provided with a hot air inlet and a flue gas inlet, the hot air inlet is connected with an outlet of the air blower (4), and the flue gas inlet is connected with an outlet of the demister (9).

6. The system for treating the colored smoke plume of the kiln tail flue gas of the cement plant as claimed in claim 1, wherein: the smoke and air mixer (5) is made of corrosion-resistant and high-temperature-resistant materials and adopts a multi-point injection mode.

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