CN110639348A - Colored smoke plume processing equipment and method - Google Patents
Colored smoke plume processing equipment and method Download PDFInfo
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- CN110639348A CN110639348A CN201810670523.5A CN201810670523A CN110639348A CN 110639348 A CN110639348 A CN 110639348A CN 201810670523 A CN201810670523 A CN 201810670523A CN 110639348 A CN110639348 A CN 110639348A
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- 239000000779 smoke Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 85
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000003546 flue gas Substances 0.000 claims abstract description 73
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 238000004523 catalytic cracking Methods 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 238000006477 desulfuration reaction Methods 0.000 claims description 17
- 230000023556 desulfurization Effects 0.000 claims description 17
- 238000003672 processing method Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003303 reheating Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention provides a colored smoke plume processing device and a method, which are used for processing colored smoke plume generated by catalytic cracking wet desulphurization, and the processing device comprises: a heat exchanger, a desulfurizing tower and a cooler; the heat exchanger receives air and colored smoke plumes to be processed, and the heat exchanger cools the colored smoke plumes to be processed through the air; the desulfurizing tower is communicated with the heat exchanger, and a desulfurizing agent is stored in the desulfurizing tower; the cooler is communicated with the desulfurizing tower, the cooler cools the desulfurizing agent and then outputs the desulfurizing agent to the desulfurizing tower, the cooled desulfurizing agent and the colored smoke plume to be treated react in the desulfurizing tower to obtain first purified flue gas, and the first purified flue gas is discharged through the desulfurizing tower.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, and relates to treatment equipment and a method for eliminating colored smoke plume.
Background
When wet desulphurization is adopted for flue gas desulphurization, the flue gas at a desulphurization outlet is usually in a saturated humidity state, the saturated humidity flue gas is rapidly cooled by the atmosphere with lower temperature after being discharged from a chimney, water vapor in the flue gas is condensed into a liquid state, and the light transmittance is reduced, so that the phenomenon of white smoke plume visible to naked eyes appears; along with the diffusion of the water vapor in the atmosphere, the concentration of the water vapor is reduced, the light transmittance is improved, and the white smoke plume is slowly reduced until disappears and cannot be seen. The prior art generally has three methods for treating colored plumes: there are generally three solutions to reduce the appearance of white smoke: (1) smoke is condensed, the temperature of the smoke is reduced, and the condensed moisture is extracted, so that the moisture in the discharged smoke is reduced, the temperature difference between the smoke and the air of the surrounding environment is reduced, and the white smoke emission phenomenon can be reduced or thoroughly eliminated by the method; (2) heating the flue gas, and increasing the temperature of the flue gas; (3) and then condensed and heated. Therefore, the existing method is mostly based on a condensation reheating process, but the following problems still exist in practice that a chimney of a wet desulphurization device of a catalytic cracking device in the petrochemical industry is usually arranged on the top of a desulphurization tower and is integrally arranged for the smoke tower. There is generally no headroom and no load. If the flue gas condensing and reheating heat exchanger is added on the chimney at the top of the tower, the modification amount of the desulfurizing tower is very large, the investment for engineering implementation is large, and the construction period is long. Therefore, it is urgently needed to develop a colored smoke plume processing device and method which overcome the above-mentioned defects.
Disclosure of Invention
The invention mainly aims to provide a colored smoke plume processing device for processing the colored smoke plume generated by catalytic cracking wet desulphurization, wherein the processing device comprises:
the heat exchanger receives air and colored smoke plumes to be processed, and cools the colored smoke plumes to be processed through the air;
the desulfurizing tower is communicated with the heat exchanger, and a desulfurizing agent is stored in the desulfurizing tower;
the cooler is communicated with the desulfurizing tower, the cooler cools the desulfurizing agent and then outputs the desulfurizing agent to the desulfurizing tower, the cooled desulfurizing agent and the colored smoke plume to be treated react in the desulfurizing tower to obtain first purified flue gas, and the first purified flue gas is discharged through the desulfurizing tower.
The treatment equipment comprises a desulfurization tower, a smoke outlet, a smoke exhaust pipeline, a smoke-air mixer, a heat exchanger, a first purifying flue gas and a second purifying flue gas, wherein the desulfurization tower is provided with the smoke outlet, the smoke exhaust pipeline is installed on the smoke outlet, the treatment equipment further comprises the smoke-air mixer, the smoke-air mixer is installed in the smoke exhaust pipeline, the smoke-air mixer is communicated with the heat exchanger, the smoke-air mixer receives the heat-exchanged air output by the heat exchanger and outputs the second purifying flue gas after the first.
The above processing equipment, wherein the processing equipment further comprises a blower, the blower is communicated with the heat exchanger, and the blower outputs the air to the heat exchanger.
The above treatment equipment further comprises a circulating pump, the circulating pump is communicated with the desulfurizing tower and the cooler, and the desulfurizing agent is output into the cooler through the circulating pump.
The above processing apparatus, wherein the cooler is a slurry cooler.
The above treatment facility, wherein the temperature of the first purified flue gas is lower than the temperature of the second purified flue gas.
In the processing equipment, the temperature of the air after heat exchange output by the heat exchanger is higher than that of the first purified flue gas.
In the above processing apparatus, the heat exchanger is a flue gas cooling heat exchanger.
The treatment equipment further comprises a cooling water circulating device, the cooling water circulating device is communicated with the cooler, the cooling water circulating device outputs circulating cooling water to carry out heat exchange and cooling on the desulfurization, and the cooling water circulating device simultaneously recovers the circulating cooling water after use.
The processing equipment further comprises an electric heater, the electric heater is communicated with the blower and the heat exchanger, and the electric heater heats the air output by the blower to a first temperature and then outputs the air to the heat exchanger.
The treatment equipment further comprises a steam heat exchanger, wherein the steam heat exchanger is communicated with the air blower and the heat exchanger, and after receiving the air output by the air blower, the steam heat exchanger exchanges heat with the air through steam to enable the air to be heated to a first temperature and then output to the heat exchanger.
The processing apparatus described above, further comprising:
the air preheater is communicated with the air blower and the heat exchanger, and is used for receiving the air output by the air blower, exchanging heat with the air through heat medium circulating water to enable the air to be increased to a first temperature and then outputting the air;
and the second heat exchanger is communicated between the heat exchanger and the desulfurizing tower, and is used for receiving the heat medium circulating water after heat exchange output by the air preheater, reducing the temperature of the colored smoke plume to be treated output by the heat exchanger again through the heat medium circulating water and outputting the colored smoke plume to be treated to the desulfurizing tower.
The processing apparatus described above, further comprising: the air heater is communicated with the air blower, the smoke-air mixer and the heat exchanger, the air heater receives the air output by the air blower, the air is subjected to heat exchange by heat medium circulating water and then output to the smoke-air mixer, the air heater outputs the heat medium circulating water to the heat exchanger, and the heat exchanger is also subjected to cooling of the colored smoke plume to be processed by the heat medium circulating water.
The invention also provides a treatment method of the colored smoke plume, which is used for treating the colored smoke plume generated by catalytic cracking wet desulphurization, wherein the treatment method comprises the following steps:
step 1: the colored smoke plume to be treated is cooled through air by a heat exchanger and then is output to a desulfurizing tower;
step 2: cooling the desulfurizer in the desulfurization tower through a cooler and then outputting the cooled desulfurizer to the desulfurization tower;
and step 3: and reacting the cooled desulfurizer with the colored smoke plume to be treated in the desulfurizing tower to obtain first purified flue gas, and discharging the first purified flue gas through the desulfurizing tower.
In the above processing method, the desulfurization tower has a smoke outlet, a smoke exhaust duct is installed on the smoke outlet, the smoke-air mixer is installed in the smoke exhaust duct, the smoke-air mixer is communicated with the heat exchanger, and the processing method further includes step 4: and the air after heat exchange output by the heat exchanger and the first purified flue gas are collected by the smoke-air mixer and then output second purified flue gas, and the second purified flue gas is discharged through the smoke discharge pipeline.
In the above processing method, in step 1, the air is output to the heat exchanger by a blower.
In the above processing method, in step 2, the desulfurizing agent is output to the cooler through a circulating pump.
In the above processing method, in the step 2, the cooler is a slurry cooler.
The treatment method described above, wherein the temperature of the first purified flue gas is lower than the temperature of the second purified flue gas.
In the above processing method, the temperature of the air after heat exchange output by the heat exchanger is higher than the temperature of the first purified flue gas.
In the above processing method, the heat exchanger is a flue gas cooling heat exchanger.
In the above processing method, the processing equipment further includes a cooling water circulation device, the cooling water circulation device is communicated with the cooler, in the step 2, the cooling water circulation device outputs the circulating cooling water to perform heat exchange and temperature reduction on the desulfurization, and the cooling water circulation device simultaneously recovers the circulating cooling water after use.
In the above processing method, step 1 further includes heating the air to a first temperature and then outputting the heated air to the heat exchanger.
The invention has the following characteristics and effects: in the implementation of the equipment and the method for treating the colored smoke plume, the modification amount of the desulfurizing tower is very small, the modification cost is low, and the modification period is greatly shortened.
Drawings
FIG. 1 is a schematic structural diagram of a colored plume processing apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a colored plume treatment device according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a colored plume treatment device according to a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a colored plume treatment apparatus according to a fourth embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a fifth embodiment of the colored plume treatment device of the present invention;
FIG. 6 is a flow chart of the colored plume processing method of the present invention.
Detailed Description
The present invention will be described in detail and with reference to the accompanying drawings, wherein:
referring to fig. 1, fig. 1 is a schematic structural diagram of a colored plume processing apparatus according to a first embodiment of the present invention. As shown in FIG. 1, the colored smoke plume treatment equipment of the present invention is used for treating the colored smoke plume generated by catalytic cracking wet desulphurization, and the treatment equipment comprises: a heat exchanger 11, a desulfurizing tower 12 and a cooler 13; the heat exchanger 11 receives air and colored smoke plumes to be processed, and the heat exchanger 11 cools the colored smoke plumes to be processed through the air; the desulfurizing tower 12 is communicated with the heat exchanger 11, and a desulfurizing agent 121 is stored in the desulfurizing tower 12; the cooler 13 is communicated with the bottom of the desulfurizing tower 12, the cooler 13 cools the desulfurizing agent 121 and then outputs the cooled desulfurizing agent to the desulfurizing tower 12, the cooled desulfurizing agent and the colored smoke plume to be treated react in the desulfurizing tower 12 to obtain first purified flue gas, and the first purified flue gas is discharged through the desulfurizing tower 12. In this embodiment, the heat exchanger 12 is a flue gas cooling heat exchanger, but the invention is not limited thereto.
Further, the desulfurizing tower 12 has a smoke outlet 122, a smoke exhaust pipeline 14 is installed on the smoke outlet 122, the treatment equipment further comprises a smoke-air mixer 15, the smoke-air mixer 15 is installed in the smoke exhaust pipeline 14 and is close to the smoke outlet 122, the smoke-air mixer 15 is communicated with the heat exchanger 11, the smoke-air mixer 15 receives the heat-exchanged air output by the heat exchanger 11 and the first purified smoke and then outputs second purified smoke, and the second purified smoke is discharged through the smoke exhaust pipeline 14.
It should be noted that in this embodiment, the temperature of the first purified flue gas is lower than that of the second purified flue gas, and the temperature of the heat-exchanged air output by the heat exchanger 11 is higher than that of the first purified flue gas.
Still further, the processing equipment further comprises a blower 16, the blower 16 is communicated with the heat exchanger 11, and the blower 16 outputs air to the heat exchanger 11.
Still further, the treatment equipment further comprises a circulating pump 17, the circulating pump 17 is communicated with the liquid outlet 123 at the bottom of the desulfurizing tower 12 and the cooler 13, and the desulfurizing agent 121 is output to the cooler 13 through the circulating pump 17.
Furthermore, the treatment equipment further comprises a cooling water circulation device 18, the cooling water circulation device 18 is communicated with the cooler 13, the cooling water circulation device 18 outputs circulating cooling water to perform heat exchange and temperature reduction on the desulfurizer 121, and meanwhile, the recycled circulating cooling water is treated. In the present embodiment, the cooler 13 is a slurry cooler, but the invention is not limited thereto.
The working process of the colored plume treatment device of the present invention will be described in detail with reference to fig. 1, in which the direction of the arrow is the direction of the gas or liquid.
Firstly, the colored smoke plume Y to be processed and air S enter a heat exchanger 11 for heat exchange, and the colored smoke plume Y to be processed enters a desulfurizing tower 12 through a smoke inlet 124 of the desulfurizing tower 12 after being cooled from 200 ℃ to 170 ℃; wherein, the air S is sent into the heat exchanger 12 through the blower 16, and the temperature of the air S is increased from 15 ℃ to 120 ℃;
secondly, the desulfurizer 121 in the desulfurizing tower 12 is sent to the cooler 13 through the circulating pump 17 and the cooling water circulating device 18 to output circulating cooling water for heat exchange, the temperature of the desulfurizer 121 is reduced from 60 ℃ to 45 ℃, and the temperature of the circulating cooling water is increased from 20 ℃ to 30 ℃. The cooled desulfurizer 121 enters the desulfurizing tower 12 through a liquid inlet 125 of the desulfurizing tower 12, and the cooled desulfurizer 121 is in contact reaction with the cooled colored smoke plume Y to be treated through spraying, so that the temperature of the colored smoke plume Y to be treated is cooled from 170 ℃ to 45 ℃ to obtain first purified flue gas at 45 ℃;
finally, the first purified flue gas with the temperature of 45 ℃ enters the smoke-air mixer 15 through the smoke outlet 122, meanwhile, the heat exchanger 12 outputs air with the temperature of 120 ℃ to the smoke-air mixer 15, the first purified flue gas Y1 is mixed with the air with the temperature of 120 ℃ through the smoke-air mixer 15 to form second purified flue gas Y2 with the temperature of 60 ℃, and the second purified flue gas Y2 is discharged through the smoke exhaust pipeline 14.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a colored smoke plume processing apparatus according to a second embodiment of the present invention. The processing apparatus shown in fig. 2 has substantially the same structure as the processing apparatus shown in fig. 1, and therefore, the same parts are not described herein again, and different parts will now be described below. As shown in fig. 2, the colored smoke plume processing apparatus further includes an electric heater 19, the electric heater 19 is communicated with the blower 16 and the heat exchanger 11, the electric heater 19 heats the air S output by the blower 16 to a first temperature, and then outputs the air S to the heat exchanger 11, wherein in this embodiment, the first temperature is 70 ℃, the air S at 70 ℃ is output to the heat exchanger 11 to exchange heat with the colored smoke plume Y to be processed, and the colored smoke plume Y to be processed is cooled from 200 ℃ to 170 ℃ and then enters the desulfurizing tower 12 through the smoke inlet 124 of the desulfurizing tower 12, but the invention is not limited thereto.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a colored smoke plume processing apparatus according to a third embodiment of the present invention, and the processing apparatus shown in fig. 3 has substantially the same structure as the processing apparatus shown in fig. 1, so that the same parts are not repeated herein, and different parts will now be described below. As shown in fig. 3, the colored smoke plume processing apparatus further includes a steam heat exchanger 20, the steam heat exchanger 20 is communicated with the blower 16 and the heat exchanger 11, after receiving the air S output by the blower 16, the steam heat exchanger 20 increases the air to a first temperature through heat exchange between steam Z and the air S, and then outputs the air to the heat exchanger 11, wherein in this embodiment, the first temperature is 70 ℃, the air S at 70 ℃ is output to the heat exchanger 11 to exchange heat with the colored smoke plume Y to be processed, and the colored smoke plume Y to be processed is cooled from 200 ℃ to 170 ℃ and then enters the desulfurizing tower 12 through the smoke inlet 124 of the desulfurizing tower 12, but the present invention is not limited thereto.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a colored smoke plume processing apparatus according to a fourth embodiment of the present invention. The processing apparatus shown in fig. 4 has substantially the same structure as the processing apparatus shown in fig. 1, and therefore, the same parts are not described herein again, and different parts will now be described below. As shown in fig. 4, the colored smoke plume processing equipment further comprises an air preheater 21 and a second heat exchanger 22; the air preheater 21 is communicated with the blower 16 and the heat exchanger 11, and after receiving the air S output by the blower 16, the air preheater 21 increases the temperature of the air S to a first temperature through heat exchange between the heat medium circulating water R and the air S and then outputs the air S; the second heat exchanger 22 is communicated between the heat exchanger 11 and the desulfurizing tower 12, and after receiving the heat-exchanged heat medium circulating water R output by the air preheater 21, the second heat exchanger 22 cools the colored smoke plume Y to be treated output by the heat exchanger 11 through the heat medium circulating water R again and outputs the colored smoke plume Y to the desulfurizing tower.
Specifically, air S is sent to an air preheater 21 through a blower 16 to exchange heat with heat medium circulating water R, the temperature of the air S is raised from 20 ℃ to 70 ℃, the first temperature is 70 ℃, and the heat medium circulating water R after heat exchange is 95 ℃; then enters a heat exchanger 11 to exchange heat with the colored smoke plume Y to be processed, and the colored smoke plume Y to be processed is cooled to 185 ℃ from 200 ℃; the 185 ℃ colored smoke plume Y to be treated enters the second heat exchanger 22, meanwhile, the 95 ℃ heat medium circulating water R also enters the second heat exchanger 22, after the 95 ℃ heat medium circulating water R exchanges heat with the 185 ℃ colored smoke plume Y to be treated again, the temperature of the heat medium circulating water R is raised to 105 ℃, and the temperature of the colored smoke plume Y to be treated is reduced from 200 ℃ to 170 ℃, and then the colored smoke plume Y to be treated enters the desulfurizing tower 12 through the smoke inlet 124 of the desulfurizing tower 12.
Further, in the present embodiment, a second circulation pump 23 is further included, and is communicated with the air preheater 21 and the second heat exchanger 22, and the heat medium circulation water R is circulated between the air preheater 21 and the second heat exchanger 22 by the second circulation pump 23.
It should be noted that although the present invention discloses the temperature values of the flue gas and the air, the present invention is not limited thereto.
The air is heated and then output to the heat exchanger, so that the acid corrosion of the heat exchanger can be avoided. Because when the smoke temperature or the temperature of the heated surface wall is reduced to be lower than the acid dew point, SO3 in the colored smoke plume to be treated begins to be condensed to generate sulfuric acid, and the sulfuric acid is attached to a heat exchanger to cause corrosion. The cold air and the colored smoke plume to be treated directly exchange heat, so that the wall temperature of the heating surface of the heat exchanger is lower than the acid dew point, and severe acid corrosion is caused. The problem is avoided by adopting the heat exchange between the air and the colored smoke plume to be treated after the air is properly heated; meanwhile, heat medium circulating water is adopted to perform circulating heat exchange between the second heat exchanger 22 and the air preheater 21, extra preheating energy consumption is not needed, and the energy-saving effect is obvious.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a colored plume processing apparatus according to a fifth embodiment of the present invention. The processing apparatus shown in fig. 5 has substantially the same structure as the processing apparatus shown in fig. 1, and therefore, the same parts are not described herein again, and different parts will now be described below. As shown in fig. 5, the colored smoke plume processing equipment further includes an air preheater 21, the air preheater 21 is communicated with the blower 16, the smoke-air mixer 15 and the heat exchanger 11, after receiving the air S output by the blower 16, the air preheater 21 exchanges heat with the air S through the heat medium circulating water R and then outputs the heat medium circulating water R to the smoke-air mixer 15, the air preheater 21 outputs the heat medium circulating water R to the heat exchanger 11, and the heat exchanger 11 further cools the colored smoke plume Y to be processed through the heat medium circulating water R. It should be noted that, in the embodiment, the air S output by the air preheater 21 is output to the smoke-air mixer 15, that is, it is not required to be output to the heat exchanger 11, but the invention is not limited thereto, and in other embodiments, the air S output by the air preheater 21 may also be output to the smoke-air mixer 15 and the heat exchanger 11.
Further, in the present embodiment, the second circulation pump 23 is further included, and is communicated with the air preheater 21 and the heat exchanger 11, and the second circulation pump 23 is used to circulate the heat medium circulation water R between the air preheater 21 and the heat exchanger 11.
Specifically, the colored plume Y to be treated firstly exchanges heat with the circulating heat medium water R through the heat exchanger 11, and the colored plume Y to be treated enters the desulfurizing tower 12 after being cooled to 170 ℃ from 200 ℃ for desulfurization and dust removal. The air S is sent to the air preheater 21 through the blower 16 to exchange heat with the heat medium circulating water R, the temperature of the air S is raised from 20 ℃ to 100 ℃, and then the air S is sent to the smoke mixer 15 to be mixed with the first purified smoke Y1. The heat medium circulating water R carries out circulating heat exchange between the heat exchanger 11 and the air preheater 21 through the second circulating pump 23, the temperature of the heat medium circulating water R at the outlet of the second circulating pump 23 is 90 ℃, the heat medium circulating water enters the heat exchanger 11 to carry out heat exchange with the colored smoke plumes Y to be treated, then the temperature is raised to 110 ℃, then the heat medium circulating water enters the air preheater 21 and air S output by the air blower 16 to carry out heat exchange, the temperature is lowered to 90 ℃, and then the heat medium circulating water R is sent to the smoke-air mixer 15 through the second.
Referring to fig. 6, fig. 6 is a flowchart of a colored smoke plume processing method according to the present invention. As shown in fig. 6, the colored smoke plume processing method of the present invention is used for processing the colored smoke plume generated by the catalytic cracking wet desulphurization, and the processing method comprises:
step S1: the colored smoke plume to be treated is cooled through air by a heat exchanger and then is output to a desulfurizing tower; in the step 1, air is output to the heat exchanger through a blower;
step S2: cooling the desulfurizer in the desulfurizing tower through a cooler and then outputting the cooled desulfurizer to the desulfurizing tower; wherein, in the step 2, the desulfurizer is output to the cooler through the circulating pump;
step S3: and reacting the cooled desulfurizer with the colored smoke plume to be treated in a desulfurizing tower to obtain first purified flue gas, and discharging the first purified flue gas through the desulfurizing tower.
Further, the desulfurization tower 12 has a smoke outlet 122, a smoke exhaust duct 14 is installed on the smoke outlet 122, a smoke-air mixer 15 is installed in the smoke exhaust duct 14, the smoke-air mixer 15 is communicated with the heat exchanger 11, and the treatment method further includes: step S4: and the air after heat exchange output by the heat exchanger and the first purified flue gas are collected by the flue gas mixer and then output second purified flue gas, and the second purified flue gas is discharged through a smoke discharge pipeline.
Still further, the treatment facility still includes cooling water circulating device 18, and cooling water circulating device 18 communicates with cooler 13, and in step 2, cooling water circulating device 18 outputs the recirculated cooling water and carries out the heat transfer cooling to the desulfurization, and cooling water circulating device 13 retrieves the recirculated cooling water after using simultaneously.
In the present embodiment, the heat exchanger 11 is a flue gas cooling heat exchanger, and the cooler 13 is a slurry cooler, which is not limited to the above embodiments.
Further, the temperature of the first purified flue gas is lower than the temperature of the second purified flue gas; the temperature of the air after heat exchange output by the heat exchanger 11 is higher than that of the first purified flue gas.
Still further, step 1 includes heating the air output by the blower to a first temperature, and outputting the air to the heat exchanger.
In conclusion, the invention integrally reduces the operation temperature and humidity in the desulfurizing tower, and can effectively reduce the water loss in the desulfurizing tower; the modification is carried out on the original desulfurizer circulating pipeline, the modification amount of the desulfurizing tower is very small, the modification cost is low, and the modification period is greatly shortened; meanwhile, the desulfurizing agent indirectly cools and condenses the flue gas, and then directly mixes and heats the hot air and the first purified flue gas, and a flue gas condensing heat exchanger and a reheater are not required to be arranged on a chimney at the top of the tower, so that the heating by an additional heat source is not required, and the energy-saving effect is good.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall still fall within the protection scope of the appended claims.
Claims (23)
1. A colored smoke plume processing device for processing colored smoke plume generated by catalytic cracking wet desulphurization, which is characterized by comprising:
the heat exchanger receives air and colored smoke plumes to be processed, and cools the colored smoke plumes to be processed through the air;
the desulfurizing tower is communicated with the heat exchanger, and a desulfurizing agent is stored in the desulfurizing tower;
the cooler is communicated with the desulfurizing tower, the cooler cools the desulfurizing agent and then outputs the desulfurizing agent to the desulfurizing tower, the cooled desulfurizing agent and the colored smoke plume to be treated react in the desulfurizing tower to obtain first purified flue gas, and the first purified flue gas is discharged through the desulfurizing tower.
2. The treatment equipment of claim 1, wherein the desulfurization tower is provided with a smoke outlet, a smoke exhaust pipeline is installed on the smoke outlet, the treatment equipment further comprises a smoke-air mixer, the smoke-air mixer is installed in the smoke exhaust pipeline, the smoke-air mixer is communicated with the heat exchanger, the smoke-air mixer receives the heat-exchanged air output by the heat exchanger and the first purified smoke and outputs second purified smoke, and the second purified smoke is exhausted through the smoke exhaust pipeline.
3. The process apparatus of claim 2, further comprising a blower in communication with the heat exchanger, the blower outputting the air to the heat exchanger.
4. The treatment apparatus of claim 3, further comprising a circulation pump, wherein the circulation pump is connected to the desulfurization tower and the cooler, and the desulfurizing agent is output to the cooler through the circulation pump.
5. The process apparatus of claim 4, wherein the cooler is a slurry cooler.
6. The treatment plant according to claim 2, characterized in that the temperature of the first cleaned flue gas is lower than the temperature of the second cleaned flue gas.
7. The process plant of claim 2 wherein the temperature of the heat exchanged air output by the heat exchanger is higher than the temperature of the first cleaned flue gas.
8. The process plant of claim 1 wherein the heat exchanger is a flue gas desuperheating heat exchanger.
9. The treatment equipment according to claim 4, further comprising a cooling water circulation device, wherein the cooling water circulation device is communicated with the cooler, the cooling water circulation device outputs circulating cooling water to perform heat exchange and temperature reduction on the desulfurization, and the cooling water circulation device simultaneously recovers the used circulating cooling water.
10. The processing apparatus as claimed in claim 3, further comprising an electric heater, wherein the electric heater is connected to the blower and the heat exchanger, and the electric heater heats the air output by the blower to a first temperature and then outputs the air to the heat exchanger.
11. The processing equipment according to claim 3, further comprising a steam heat exchanger, wherein the steam heat exchanger is communicated with the blower and the heat exchanger, and after receiving the air output by the blower, the steam heat exchanger increases the air to a first temperature through heat exchange between steam and the air and then outputs the air to the heat exchanger.
12. The processing device of claim 3, further comprising:
the air preheater is communicated with the air blower and the heat exchanger, and is used for receiving the air output by the air blower, exchanging heat with the air through heat medium circulating water to enable the air to be increased to a first temperature and then outputting the air;
and the second heat exchanger is communicated between the heat exchanger and the desulfurizing tower, and is used for receiving the heat medium circulating water after heat exchange output by the air preheater, reducing the temperature of the colored smoke plume to be treated output by the heat exchanger again through the heat medium circulating water and outputting the colored smoke plume to be treated to the desulfurizing tower.
13. The processing device of claim 3, further comprising: the air heater is communicated with the air blower, the smoke-air mixer and the heat exchanger, the air heater receives the air output by the air blower, the air is subjected to heat exchange by heat medium circulating water and then output to the smoke-air mixer, the air heater outputs the heat medium circulating water to the heat exchanger, and the heat exchanger is also subjected to cooling of the colored smoke plume to be processed by the heat medium circulating water.
14. A colored smoke plume processing method for processing the colored smoke plume generated by catalytic cracking wet desulphurization, which is characterized by comprising the following steps:
step 1: the colored smoke plume to be treated is cooled through air by a heat exchanger and then is output to a desulfurizing tower;
step 2: cooling the desulfurizer in the desulfurization tower through a cooler and then outputting the cooled desulfurizer to the desulfurization tower;
and step 3: and reacting the cooled desulfurizer with the colored smoke plume to be treated in the desulfurizing tower to obtain first purified flue gas, and discharging the first purified flue gas through the desulfurizing tower.
15. The process of claim 14, wherein the desulfurization tower has a flue gas outlet, a flue gas duct is installed on the flue gas outlet, the flue gas mixer is installed in the flue gas duct, the flue gas mixer is communicated with the heat exchanger, and the process further comprises step 4: and the air after heat exchange output by the heat exchanger and the first purified flue gas are collected by the smoke-air mixer and then output second purified flue gas, and the second purified flue gas is discharged through the smoke discharge pipeline.
16. The process of claim 15 wherein in step 1, said air is output to said heat exchanger by a blower.
17. The process of claim 16, wherein in step 2, the desulfurizing agent is output to the cooler by a circulation pump.
18. The process of claim 17 wherein in step 2, the cooler is a slurry cooler.
19. The treatment method of claim 15, wherein the temperature of the first cleaned flue gas is lower than the temperature of the second cleaned flue gas.
20. The process of claim 15 wherein the temperature of the heat exchanged air output by the heat exchanger is higher than the temperature of the first cleaned flue gas.
21. The process of claim 14, wherein the heat exchanger is a flue gas desuperheating heat exchanger.
22. The treatment method of claim 16, wherein the treatment equipment further comprises a cooling water circulation device, the cooling water circulation device is communicated with the cooler, in the step 2, the cooling water circulation device outputs circulating cooling water to perform heat exchange and temperature reduction on the desulfurization, and the cooling water circulation device simultaneously recovers the used circulating cooling water.
23. The process of claim 16, wherein step 1 further comprises heating the air to a first temperature before outputting to the heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810670523.5A CN110639348A (en) | 2018-06-26 | 2018-06-26 | Colored smoke plume processing equipment and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810670523.5A CN110639348A (en) | 2018-06-26 | 2018-06-26 | Colored smoke plume processing equipment and method |
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