CN216557146U - Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant - Google Patents
Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant Download PDFInfo
- Publication number
- CN216557146U CN216557146U CN202122371166.2U CN202122371166U CN216557146U CN 216557146 U CN216557146 U CN 216557146U CN 202122371166 U CN202122371166 U CN 202122371166U CN 216557146 U CN216557146 U CN 216557146U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- temperature
- outlet
- inlet
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model discloses a low-temperature flue gas desulfurization and denitrification system of a rotary kiln combustion furnace of a garbage power plant, which comprises the rotary kiln combustion furnace, a waste heat boiler, an absorption refrigerating unit, a desulfurization tower and a low-temperature adsorption tower; the waste heat boiler comprises a first flue gas inlet and a first flue gas outlet, and the flue gas discharge port is communicated with the first flue gas inlet; the absorption refrigerating unit comprises a second smoke inlet and a second smoke outlet, and the first smoke outlet is communicated with the second smoke inlet; the desulfurizing tower comprises a fourth flue gas inlet and a fourth flue gas outlet, and the second flue gas outlet is communicated with the fourth flue gas inlet; the low-temperature adsorption tower comprises a fifth flue gas inlet and a fifth flue gas outlet, and the third flue gas outlet is communicated with the fifth flue gas inlet. The low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the garbage power plant has the advantages of high desulfurization rate and high denitrification rate.
Description
Technical Field
The utility model relates to the technical field of gas purification, in particular to a low-temperature flue gas desulfurization and denitrification system for a rotary kiln combustion furnace of a garbage power plant.
Background
The components of the municipal solid waste are complex, so the smoke components generated in the combustion process are also extremely complex. The flue gas of the garbage power plant contains nitrogen oxide and sulfur dioxide, and desulfurization and denitrification must be carried out before the flue gas is discharged. In the correlation technique, after the flue gas of rubbish power plant fired the burning furnace discharge from the rotary kiln, the flue gas was direct to carry out the denitration under high temperature, carries out the desulfurization again, and the denitration is inefficient.
SUMMERY OF THE UTILITY MODEL
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
in the related art, a reaction device for denitration is installed in an exhaust heat boiler. The raw material for denitration is urea, the urea is prepared into urea solution with a certain concentration, then the urea solution is sprayed into the waste heat boiler by a pump, and a spray gun is arranged in the waste heat boiler and can atomize the urea solution entering the boiler. The temperature in the furnace is about 1000 ℃. The high-temperature flue gas is fully and uniformly mixed in a furnace body with a foggy urea solution for a certain time. In the presence of gaseous oxygen in the boiler, NOx reacts with the urea solution in the mist state; when the amount of NOx is half of the urea content, the removal rate of nitrogen oxides is approximately 30% to 50%, and thus the desulfurization rate is low.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the utility model provides a low-temperature desulfurization and denitrification system for flue gas of a rotary kiln combustion furnace of a garbage power plant, which has the advantages of high desulfurization rate and high denitrification rate.
The low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the garbage power plant comprises the following components:
the rotary kiln combustion furnace comprises a smoke discharge port;
the waste heat boiler comprises a first smoke inlet and a first smoke outlet, and the smoke discharge port is communicated with the first smoke inlet so as to introduce smoke into the waste heat boiler, so that the smoke heats the waste heat boiler, and the temperature of the smoke is reduced;
the absorption refrigerating unit comprises a steam generator and an evaporator, the steam generator comprises a second smoke inlet and a second smoke outlet, the evaporator comprises a third smoke inlet and a third smoke outlet, and the first smoke outlet is communicated with the second smoke inlet so as to introduce the smoke into the steam generator and reduce the temperature of the smoke;
the desulfurizing tower is internally provided with slaked lime for desulfurization and comprises a fourth flue gas inlet and a fourth flue gas outlet, the second flue gas outlet is communicated with the fourth flue gas inlet so as to introduce the flue gas into the desulfurizing tower to desulfurize the flue gas,
a fourth flue gas outlet is communicated with the third flue gas inlet so as to introduce the flue gas into the evaporator, thereby reducing the temperature of the flue gas;
the low-temperature adsorption tower comprises a fifth flue gas inlet and a fifth flue gas outlet, and the third flue gas outlet is communicated with the fifth flue gas inlet so as to introduce the flue gas into the low-temperature adsorption tower, so that the flue gas is desulfurized and denitrated.
According to the low-temperature flue gas desulfurization and denitration system for the rotary kiln combustion furnace of the waste power plant, disclosed by the embodiment of the utility model, the flue gas is cooled through the waste heat boiler and the absorption refrigerating unit, so that the temperature of the flue gas is reduced, the cooled flue gas is subjected to desulfurization treatment in the desulfurization tower, and the desulfurization efficiency of the cooled flue gas is high, so that the desulfurization rate of the low-temperature flue gas desulfurization and denitration system for the rotary kiln combustion furnace of the waste power plant is increased. The flue gas desulfurized by the desulfurizing tower is cooled again by the absorption refrigerating unit, the cooled flue gas is desulfurized and denitrated in the low-temperature adsorption tower, and the flue gas desulfurized and denitrated efficiency after being cooled again is high, so that the denitration rate of the flue gas low-temperature desulfurization and denitration system of the rotary kiln combustion furnace of the waste power plant is increased.
In some embodiments, the low-temperature desulfurization and denitrification system for flue gas of a rotary kiln combustion furnace of a waste power plant further includes a cooling tower, the cooling tower includes a sixth flue gas inlet and a sixth flue gas outlet, the sixth flue gas inlet is communicated with the second flue gas inlet so as to introduce the flue gas into the cooling tower, so as to reduce the temperature of the flue gas, and the sixth flue gas outlet is communicated with the fourth flue gas inlet so as to communicate the second flue gas outlet with the fourth flue gas inlet.
In some embodiments, the precipitator includes a gas inlet in communication with the fourth flue gas outlet for passing the flue gas into the precipitator, and a gas outlet in communication with the third flue gas inlet for communicating the fourth flue gas outlet with the third flue gas inlet.
In some embodiments, the low-temperature desulfurization and denitrification system for flue gas of the rotary kiln combustion furnace of the refuse power plant further comprises a precooler, wherein the precooler comprises a seventh flue gas inlet and a seventh flue gas outlet, and the seventh flue gas inlet is communicated with the gas outlet so as to introduce the flue gas into the precooler, thereby reducing the temperature of the flue gas; the seventh flue gas outlet is communicated with the third flue gas inlet so that the gas outlet is communicated with the third flue gas inlet.
In some embodiments, the precooler includes a first heat exchange assembly including the seventh flue gas inlet and the seventh flue gas outlet, and a second heat exchange assembly capable of passing a cryogenic fluid, the seventh flue gas inlet being in communication with the gas outlet for passing the flue gas into the first heat exchange assembly to reduce the temperature of the flue gas.
In some embodiments, the second heat exchange assembly has an eighth flue gas inlet and an eighth flue gas outlet, the eighth flue gas inlet being in communication with the fifth flue gas outlet so that the flue gas passes into the second heat exchange assembly to form the flue gas into the cryogenic fluid.
In some embodiments, the low-temperature flue gas desulfurization and denitration system for the rotary kiln of the waste power plant in the embodiment of the utility model further comprises an induced draft fan, the induced draft fan is arranged between the precooler and the dust remover, an air inlet of the induced draft fan is communicated with the air outlet, and an air outlet of the induced draft fan is communicated with the seventh flue gas inlet, so that the seventh flue gas inlet is communicated with the air outlet.
In some embodiments, the low-temperature desulfurization and denitrification system for flue gas of the rotary kiln combustion furnace of the refuse power plant further includes a flue pipe, and the flue pipe is communicated with the fifth flue gas outlet or the eighth flue gas outlet so as to discharge the flue gas.
In some embodiments, the waste heat boiler comprises a flue gas duct comprising the first flue gas inlet and the first flue gas outlet, the flue gas duct being for heating the waste heat boiler.
Drawings
FIG. 1 is a schematic structural diagram of a low-temperature flue gas desulfurization and denitrification system of a rotary kiln combustion furnace of a refuse power plant in an embodiment of the utility model.
FIG. 2 is a schematic structural diagram of a low-temperature flue gas desulfurization and denitrification system of a rotary kiln combustion furnace of a refuse power plant in an embodiment of the utility model.
Reference numerals:
a rotary kiln combustion furnace 1; a flue gas discharge port 11;
a waste heat boiler 2; a first flue gas inlet 21; a first flue gas outlet 22;
an absorption refrigeration unit 3; a steam generator 31; a second flue gas inlet 311; a second flue gas outlet 312; an evaporator 32; a third flue gas inlet 321; a third flue gas outlet 322;
a desulfurizing tower 4; a fourth flue gas inlet 41; a fourth flue gas outlet 42;
a low-temperature adsorption tower 5; a fifth flue gas inlet 51; a fifth flue gas outlet 52;
a cooling tower 6; a sixth flue gas inlet 61; a sixth flue gas outlet 62;
a dust remover 7; an air inlet 71; an air outlet 72; a dust outlet 73;
an induced draft fan 8; a ninth flue gas inlet 81; a ninth flue gas outlet 82;
a precooler 9; a first heat exchange assembly 91; a seventh flue gas inlet 911; a seventh flue gas outlet 912; a second heat exchange assembly 92; an eighth flue gas inlet 921; an eighth flue gas outlet 922;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
The low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the refuse power plant in the embodiment of the utility model is described below with reference to the accompanying drawings.
As shown in fig. 1, the low-temperature desulfurization and denitrification system for flue gas of a rotary kiln combustion furnace of a refuse power plant according to an embodiment of the present invention includes a rotary kiln combustion furnace 1, a waste heat boiler 2, an absorption refrigeration unit 3, a desulfurization tower 4, and a low-temperature adsorption tower 5.
The rotary kiln combustion furnace 1 comprises a smoke discharge port 11, and specifically, the rotary kiln combustion furnace 1 is provided with the smoke discharge port 11, so that high-temperature smoke (the temperature of the high-temperature smoke is 1100-1200 ℃) generated in the rotary kiln combustion furnace 1 is discharged from the smoke discharge port 11 of the rotary kiln combustion furnace 1.
The waste heat boiler 2 comprises a first flue gas inlet 21 and a first flue gas outlet 22, and the flue gas discharge port 11 is communicated with the first flue gas inlet 21 so as to introduce flue gas into the waste heat boiler 2, so that the flue gas heats the waste heat boiler 2, thereby reducing the temperature of the flue gas. Specifically, high-temperature flue gas discharged from the flue gas discharge port 11 of the rotary kiln combustion furnace 1 enters the waste heat boiler 2 through the first flue gas inlet 21.
It can be understood that the high-temperature flue gas exchanges heat with the waste heat boiler 2, and the temperature of the high-temperature flue gas can be reduced after the high-temperature flue gas exchanges heat with water in the waste heat boiler 2, wherein the temperature of the high-temperature flue gas after temperature reduction is 300-350 ℃, and the high-temperature flue gas after temperature reduction is discharged from the first flue gas outlet 22 of the waste heat boiler 2. In addition, the waste heat boiler 2 can absorb heat of high-temperature flue gas, and the utilization rate of heat released by fuel combustion is improved.
The absorption chiller unit 3 comprises a steam generator 31 and an evaporator 32, the steam generator 31 comprises a second flue gas inlet 311 and a second flue gas outlet 312, the evaporator 32 comprises a third flue gas inlet 321 and a third flue gas outlet 322, and the first flue gas outlet 22 is communicated with the second flue gas inlet 311 so as to introduce the flue gas into the steam generator 31, thereby reducing the temperature of the flue gas.
Specifically, the flue gas discharged from the waste heat boiler 2 enters the steam generator 31 through the second flue gas inlet 311 of the steam generator 31, exchanges heat with the coolant in the steam generator 31, so that the coolant evaporates and absorbs heat of the flue gas, and further, the cooled flue gas is discharged from the second flue gas outlet 312 of the steam generator 31.
The desulfurizing tower 4 comprises a fourth flue gas inlet 41 and a fourth flue gas outlet 42, and the second flue gas outlet 312 is communicated with the fourth flue gas inlet 41 so as to introduce the flue gas into the desulfurizing tower 4, thereby desulfurizing the flue gas.
Specifically, the flue gas discharged from the steam generator 31 enters the desulfurizing tower 4 through the fourth flue gas inlet 41, and is subjected to desulfurization treatment in the desulfurizing tower 4 to remove sulfur-containing compounds in the flue gas, and after the flue gas is subjected to desulfurization treatment, the flue gas is discharged from the fourth flue gas outlet 42 of the desulfurizing tower 4.
The fourth flue gas outlet 42 communicates with the third flue gas inlet 321 for passing flue gas into the evaporator 32 to reduce the temperature of the flue gas. Specifically, the desulfurized flue gas is discharged through the fourth flue gas outlet 42 of the desulfurization tower 4, and enters the evaporator 32 from the third flue gas inlet 321 of the evaporator 32, so that the flue gas exchanges heat with the refrigerant in the evaporator 32, and the temperature of the flue gas is further reduced.
Slaked lime is arranged in the desulfurizing tower. Specifically, the desulfurization tower 4 performs desulfurization treatment on the flue gas by reacting the slaked lime with the flue gas, so that the desulfurization tower can remove sulfur-containing compounds in the flue gas. Wherein, the desulfurizing tower 4 carries out desulfurization treatment on the flue gas, including dry desulfurization and semi-dry desulfurization.
Optionally, the sulfur-containing compounds in the flue gas are removed by dry desulfurization, wherein the dry hydrated lime is used as an absorbent, and the flue gas in the desulfurizing tower 4 reacts with the dry hydrated lime, so that the sulfur-containing compounds in the flue gas are removed. Or removing sulfur compounds in the smoke by adopting a semidry method for desulfurization. The slaked lime slurry is sprayed into the desulfurizing tower 4, so that the slaked lime slurry is uniformly distributed in the desulfurizing tower 4, the flue gas reacts with the slaked lime in the desulfurizing tower 4, and the sulfur-containing compounds in the flue gas are removed.
The low-temperature adsorption tower 5 comprises a fifth flue gas inlet 51 and a fifth flue gas outlet 52, and the third flue gas outlet 322 is communicated with the fifth flue gas inlet 51 so as to introduce the flue gas into the low-temperature adsorption tower 5, thereby performing desulfurization and denitration on the flue gas.
Specifically, the cooled flue gas after desulfurization is discharged through the third flue gas outlet 322 of the evaporator 32, and enters the low-temperature adsorption tower 5 from the fifth flue gas inlet 51 of the low-temperature adsorption tower 5, and is subjected to desulfurization and denitrification treatment, and the flue gas after desulfurization and denitrification treatment is discharged to the outside from the fifth flue gas outlet 52.
According to the low-temperature flue gas desulfurization and denitration system for the rotary kiln combustion furnace of the waste power plant, disclosed by the embodiment of the utility model, the flue gas is cooled through the waste heat boiler 2 and the absorption refrigerating unit 3, so that the temperature of the flue gas is reduced, the cooled flue gas is subjected to desulfurization treatment in the desulfurization tower 4, and the desulfurization efficiency of the cooled flue gas is high, so that the desulfurization rate of the low-temperature flue gas desulfurization and denitration system for the rotary kiln combustion furnace of the waste power plant is increased. The flue gas desulfurized by the desulfurizing tower 4 is cooled again by the absorption refrigerating unit 3, the cooled flue gas is desulfurized and denitrated in the low-temperature adsorption tower 5, and the flue gas desulfurized and desulfurized by the cooling again has high efficiency, so that the denitration rate of the flue gas low-temperature desulfurization and denitration system of the rotary kiln combustion furnace of the waste power plant in the embodiment of the utility model is increased.
Therefore, the low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant has the advantages of high desulfurization rate and high denitrification rate.
In some embodiments, as shown in fig. 2, the low-temperature desulfurization and denitration system for flue gas of a rotary kiln combustion furnace of a waste power plant in an embodiment of the present invention further includes a cooling tower 6, the cooling tower 6 includes a sixth flue gas inlet 61 and a sixth flue gas outlet 62, the sixth flue gas inlet 61 is communicated with the second flue gas inlet 311 to introduce flue gas into the cooling tower 6 so as to reduce the temperature of the flue gas, and the sixth flue gas outlet 62 is communicated with the fourth flue gas inlet 41 so as to communicate the second flue gas outlet 312 with the fourth flue gas inlet 41.
Specifically, the flue gas cooled by the steam generator 31 is discharged from the second flue gas inlet 311, and enters the cooling tower 6 through the sixth flue gas inlet 61, and the flue gas is cooled in the cooling tower 6. After being cooled by the cooling tower 6, the flue gas is discharged through the sixth flue gas outlet 62 and enters the desulfurization tower 4 through the fourth flue gas inlet 41.
It can be understood that the flue gas cooled by the steam generator 31 is at 180-300 ℃ and at 300-500 ℃, harmful substance dioxin is easily generated in the flue gas, and the flue gas cooled by the steam generator 31 is introduced into the cooling tower 6 for cooling, so that the generation of the dioxin is inhibited, and therefore, the flue gas discharged to the outside does not contain harmful substance dioxin, and the purpose of environmental protection is achieved.
Therefore, the low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the garbage power plant has the advantage of environmental protection.
In some embodiments, as shown in fig. 2, the low-temperature desulfurization and denitration system for flue gas of a rotary kiln combustion furnace of a waste power plant in an embodiment of the present invention further includes a dust remover 7, the dust remover 7 includes a gas inlet 71 and a gas outlet 72, the gas inlet 71 is communicated with the fourth flue gas outlet 42 to introduce the flue gas into the dust remover 7, and the gas outlet 72 is communicated with the third flue gas inlet 321 to communicate the fourth flue gas outlet 42 with the third flue gas inlet 321.
Specifically, the flue gas desulfurized by the desulfurizing tower 4 is discharged from the fourth flue gas outlet 42, enters the dust remover 7 through the gas inlet 71 of the dust remover 7, is subjected to dust removal treatment in the dust remover 7, and then removes the smoke dust in the flue gas, so that the flue gas discharged to the outside has no smoke dust, and the purpose of environmental protection is achieved.
Furthermore, the dust remover 7 is provided with a dust outlet 73, and the smoke filtered by the dust remover 7 is discharged through the dust outlet 73, so that the filtered smoke is recycled, and secondary pollution to the environment is avoided.
Therefore, the low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the garbage power plant has the advantage of environmental protection.
In some embodiments, as shown in fig. 2, the low-temperature flue gas desulfurization and denitration system for a rotary kiln combustion furnace of a refuse power plant in an embodiment of the present invention further includes a precooler 9, where the precooler 9 includes a seventh flue gas inlet 911 and a seventh flue gas outlet 912, and the seventh flue gas inlet 911 is communicated with the gas outlet 72, so as to introduce the flue gas into the precooler 9, thereby reducing the temperature of the flue gas. The seventh flue gas outlet 912 communicates with the third flue gas inlet 321, so that the gas outlet 72 communicates with the third flue gas inlet 321.
Specifically, the flue gas dedusted by the deduster 7 is discharged from the gas outlet 72 of the deduster 7, enters the precooler 9 through the seventh flue gas inlet 911 of the precooler 9, is subjected to cooling treatment in the precooler 9, and is discharged through the seventh flue gas outlet 912 and enters the evaporator 32 through the third flue gas inlet 321.
Further, the precooler 9 comprises a first heat exchange assembly 91 and a second heat exchange assembly 92, the first heat exchange assembly 91 comprises a seventh flue gas inlet 911 and a seventh flue gas outlet 912, the second heat exchange assembly 92 can be introduced with the low-temperature fluid, and the seventh flue gas inlet 911 is communicated with the air outlet 72 so as to introduce the flue gas into the first heat exchange assembly 91, thereby reducing the temperature of the flue gas.
Specifically, the flue gas dedusted by the deduster 7 enters the first heat exchange assembly 91 through the seventh flue gas inlet 911, and the flue gas in the first heat exchange assembly 91 exchanges heat with the low-temperature fluid in the second heat exchange assembly 92, so that the temperature of the flue gas in the first heat exchange assembly 91 is reduced. The cooled flue gas is discharged through the seventh flue gas outlet 912 of the first heat exchange assembly 91, and enters the evaporator 32 through the third flue gas inlet 321 to be cooled again.
Further, the second heat exchange assembly 92 has an eighth flue gas inlet 921 and an eighth flue gas outlet 922, and the eighth flue gas inlet 921 is communicated with the fifth flue gas outlet 52, so that the flue gas is introduced into the second heat exchange assembly 92, so that the flue gas forms the low-temperature fluid.
Specifically, the flue gas subjected to desulfurization and denitration treatment in the low-temperature adsorption tower 5 is discharged through the fifth flue gas outlet 52, and enters the second heat exchange assembly 92 through the eighth flue gas inlet 921 of the second heat exchange assembly 92. It can be understood that the temperature of the flue gas in the cryoadsorption tower 5 is reduced again by the evaporator 32, and then the temperature of the flue gas discharged from the cryoadsorption tower 5 is lower than that of the flue gas in the first heat exchange assembly 91, so that the flue gas discharged from the cryoadsorption tower 5 forms a cryogenic fluid, and the cryogenic fluid formed by the flue gas exchanges heat with the flue gas in the first heat exchange assembly 91 in the second heat exchange assembly 92, and then the temperature of the flue gas in the first heat exchange assembly 91 is reduced. Therefore, the low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the garbage power plant has the advantage of energy conservation.
In some embodiments, as shown in fig. 2, the low-temperature desulfurization and denitrification system for flue gas of a rotary kiln combustion furnace of a waste power plant in an embodiment of the utility model further includes an induced draft fan 8, the induced draft fan 8 is arranged between the precooler 9 and the deduster 7, an air inlet of the induced draft fan 8 is communicated with the air outlet 72, and an air outlet of the induced draft fan 8 is communicated with the seventh flue gas inlet 911, so that the seventh flue gas inlet 911 is communicated with the air outlet 72.
Specifically, the induced draft fan 8 has a ninth flue gas inlet 81 and a ninth flue gas outlet 82, wherein the ninth flue gas inlet 81 is an air inlet of the induced draft fan 8, and the ninth flue gas outlet 82 is an air outlet of the induced draft fan 8. Specifically, the ninth flue gas inlet 81 of the induced draft fan 8 is communicated with the gas outlet 72 of the dust remover 7, and the ninth flue gas outlet 82 of the induced draft fan 8 is communicated with the seventh flue gas inlet 911 of the precooler 9.
It can be understood that the induced draft fan 8 can accelerate the flow speed of the flue gas, and further increase the treatment efficiency of the flue gas in the low-temperature flue gas desulfurization and denitrification system of the rotary kiln combustion furnace of the waste power plant in the embodiment of the utility model.
In some embodiments, the low-temperature desulfurization and denitrification system for flue gas of the rotary kiln combustion furnace of the refuse power plant of the embodiment of the utility model further includes a chimney, and the chimney is connected with the fifth flue gas outlet 52 or the eighth flue gas outlet 922 so as to discharge flue gas. Specifically, the chimney communicates with the fifth flue gas outlet 52 of the cryoadsorption tower 5, so that the flue gas discharged from the cryoadsorption tower 5 is discharged through the chimney. Alternatively, the chimney is in communication with the eighth flue gas outlet 922 of the precooler 9, thereby allowing the flue gas discharged from the precooler 9 to be discharged through the chimney.
In some embodiments, the heat recovery steam generator 2 comprises a flue gas duct comprising a first flue gas inlet 21 and a first flue gas outlet 22, which flue gas duct is used for heating the heat recovery steam generator 2. Specifically, the high-temperature flue gas discharged from the rotary kiln combustion furnace 1 enters the flue gas pipeline from the first flue gas inlet 21 of the flue gas pipeline, and the high-temperature flue gas exchanges heat with the waste heat boiler 2 in the flue gas pipeline, so that the temperature of the high-temperature flue gas is reduced.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. The utility model provides a rotary kiln of rubbish power plant fires burning furnace flue gas low temperature SOx/NOx control system which characterized in that includes:
the rotary kiln combustion furnace comprises a smoke discharge port;
the waste heat boiler comprises a first smoke inlet and a first smoke outlet, and the smoke discharge port is communicated with the first smoke inlet so as to introduce smoke into the waste heat boiler, so that the smoke heats the waste heat boiler, and the temperature of the smoke is reduced;
the absorption refrigerating unit comprises a steam generator and an evaporator, the steam generator comprises a second smoke inlet and a second smoke outlet, the evaporator comprises a third smoke inlet and a third smoke outlet, and the first smoke outlet is communicated with the second smoke inlet so as to introduce the smoke into the steam generator and reduce the temperature of the smoke;
the desulfurizing tower is internally provided with slaked lime for desulfurization and comprises a fourth flue gas inlet and a fourth flue gas outlet, the second flue gas outlet is communicated with the fourth flue gas inlet so as to introduce the flue gas into the desulfurizing tower to desulfurize the flue gas,
a fourth flue gas outlet is communicated with the third flue gas inlet so as to introduce the flue gas into the evaporator, thereby reducing the temperature of the flue gas;
the low-temperature adsorption tower comprises a fifth flue gas inlet and a fifth flue gas outlet, and the third flue gas outlet is communicated with the fifth flue gas inlet so as to introduce the flue gas into the low-temperature adsorption tower, so that the flue gas is desulfurized and denitrated.
2. The low-temperature desulfurization and denitrification system for flue gas of a rotary kiln furnace of a refuse power plant as claimed in claim 1, further comprising a cooling tower, wherein the cooling tower comprises a sixth flue gas inlet and a sixth flue gas outlet, the sixth flue gas inlet is communicated with the second flue gas inlet so as to introduce the flue gas into the cooling tower, thereby reducing the temperature of the flue gas,
and the sixth flue gas outlet is communicated with the fourth flue gas inlet so that the second flue gas outlet is communicated with the fourth flue gas inlet.
3. The low-temperature desulfurization and denitrification system for flue gas of a rotary kiln combustion furnace of a refuse power plant as claimed in claim 2, further comprising a dust remover, wherein the dust remover comprises a gas inlet and a gas outlet, the gas inlet is communicated with the fourth flue gas outlet so as to introduce the flue gas into the dust remover,
and the gas outlet is communicated with the third flue gas inlet so that a fourth flue gas outlet is communicated with the third flue gas inlet.
4. The low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the refuse power plant as claimed in claim 3, further comprising a precooler, wherein the precooler comprises a seventh flue gas inlet and a seventh flue gas outlet, and the seventh flue gas inlet is communicated with the gas outlet so as to introduce the flue gas into the precooler, thereby reducing the temperature of the flue gas;
the seventh flue gas outlet is communicated with the third flue gas inlet so that the gas outlet is communicated with the third flue gas inlet.
5. The low-temperature desulfurization and denitrification system for the flue gas of the rotary kiln combustion furnace of the garbage power plant as claimed in claim 4, wherein the precooler comprises a first heat exchange assembly and a second heat exchange assembly, the first heat exchange assembly comprises the seventh flue gas inlet and the seventh flue gas outlet, the second heat exchange assembly can be introduced with low-temperature fluid, and the seventh flue gas inlet is communicated with the gas outlet so as to introduce the flue gas into the first heat exchange assembly, thereby reducing the temperature of the flue gas.
6. The low-temperature desulfurization and denitrification system for flue gas of a rotary kiln combustion furnace of a refuse power plant as claimed in claim 5, wherein the second heat exchange assembly is provided with an eighth flue gas inlet and an eighth flue gas outlet, and the eighth flue gas inlet is communicated with the fifth flue gas outlet so that the flue gas is introduced into the second heat exchange assembly to form the flue gas into the low-temperature fluid.
7. The low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the refuse power plant as claimed in claim 5, further comprising an induced draft fan, wherein the induced draft fan is arranged between the precooler and the dust remover, an air inlet of the induced draft fan is communicated with the air outlet, and an air outlet of the induced draft fan is communicated with the seventh flue gas inlet, so that the seventh flue gas inlet is communicated with the air outlet.
8. The low-temperature flue gas desulfurization and denitrification system for the rotary kiln combustion furnace of the garbage power plant as claimed in claim 6, further comprising a flue pipe, wherein the flue pipe is communicated with the fifth flue gas outlet or the eighth flue gas outlet so as to discharge the flue gas.
9. The low-temperature desulfurization and denitrification system for flue gas of a rotary kiln combustion furnace of a refuse power plant as claimed in any one of claims 1 to 8, wherein the waste heat boiler comprises a flue gas pipeline, the flue gas pipeline comprises the first flue gas inlet and the first flue gas outlet, and the flue gas pipeline is used for heating the waste heat boiler.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122371166.2U CN216557146U (en) | 2021-09-28 | 2021-09-28 | Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant |
| PCT/CN2022/099162 WO2023050897A1 (en) | 2021-09-28 | 2022-06-16 | Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122371166.2U CN216557146U (en) | 2021-09-28 | 2021-09-28 | Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216557146U true CN216557146U (en) | 2022-05-17 |
Family
ID=81566006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122371166.2U Active CN216557146U (en) | 2021-09-28 | 2021-09-28 | Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN216557146U (en) |
| WO (1) | WO2023050897A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023050897A1 (en) * | 2021-09-28 | 2023-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant |
| WO2023050702A1 (en) * | 2021-09-28 | 2023-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Low-temperature desulfurization and denitrification method and system for flue gas from rotary kiln combustion furnace of refuse incineration power plant |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3777623B2 (en) * | 1994-12-05 | 2006-05-24 | 石川島播磨重工業株式会社 | Gas processing equipment |
| US9919266B2 (en) * | 2016-01-14 | 2018-03-20 | Fluor Technologies Corporation | Systems and methods for treatment of flue gas |
| CN105854571A (en) * | 2016-06-21 | 2016-08-17 | 南通天蓝环保能源成套设备有限公司 | Novel medical waste incineration flue gas purification system |
| CN108939901B (en) * | 2017-05-27 | 2020-07-24 | 钢研晟华工程技术有限公司 | Sintering flue gas desulfurization and denitrification device and method |
| CN110743312A (en) * | 2019-10-29 | 2020-02-04 | 中国华能集团有限公司 | Flue gas low-temperature adsorption denitration system and process |
| CN111495112A (en) * | 2020-05-18 | 2020-08-07 | 中国华能集团有限公司 | Low temperature removes integration of bed and adsorbs SOx/NOx control system |
| CN112275104A (en) * | 2020-10-16 | 2021-01-29 | 北京中航泰达环保科技股份有限公司 | Flue gas waste heat comprehensive utilization system of coke oven flue gas semi-dry process technology |
| CN112268293A (en) * | 2020-11-11 | 2021-01-26 | 西安热工研究院有限公司 | Large-scale thermal power generating unit flue gas active coke purification system and method |
| CN216557146U (en) * | 2021-09-28 | 2022-05-17 | 中国华能集团清洁能源技术研究院有限公司 | Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant |
-
2021
- 2021-09-28 CN CN202122371166.2U patent/CN216557146U/en active Active
-
2022
- 2022-06-16 WO PCT/CN2022/099162 patent/WO2023050897A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023050897A1 (en) * | 2021-09-28 | 2023-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Flue gas low-temperature desulfurization and denitrification system for rotary kiln combustion furnace of garbage power plant |
| WO2023050702A1 (en) * | 2021-09-28 | 2023-04-06 | 中国华能集团清洁能源技术研究院有限公司 | Low-temperature desulfurization and denitrification method and system for flue gas from rotary kiln combustion furnace of refuse incineration power plant |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023050897A1 (en) | 2023-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108579369B (en) | Coke oven flue gas multi-pollutant cooperative treatment system and method | |
| CN216557146U (en) | Low-temperature flue gas desulfurization and denitrification system of rotary kiln combustion furnace of garbage power plant | |
| CN110917843A (en) | Waste incineration energy-saving flue gas ultralow purification system | |
| WO2021114084A1 (en) | Energy-saving ultralow flue gas purification system for waste incineration | |
| CN104759192A (en) | Low-cost coal-fired flue gas various pollutant ultralow emission system and low-cost coal-fired flue gas various pollutant ultralow emission method | |
| CN105214478A (en) | The integral process of a kind of coke oven flue exhuast gas desulfurization denitration and waste heat recovery | |
| CN107376639B (en) | Hazardous waste incineration flue gas purification method | |
| CN105854571A (en) | Novel medical waste incineration flue gas purification system | |
| CN110624384A (en) | Purification treatment method and purification treatment device for waste incineration flue gas | |
| WO2023050702A1 (en) | Low-temperature desulfurization and denitrification method and system for flue gas from rotary kiln combustion furnace of refuse incineration power plant | |
| CN102294171A (en) | Flue gas purifying system | |
| CN112268293A (en) | Large-scale thermal power generating unit flue gas active coke purification system and method | |
| CN101791561A (en) | Desulphurization and denitration catalyst and preparation method thereof | |
| CN113769551B (en) | Low-temperature desulfurization and denitrification method and system for biomass power plant flue gas | |
| CN105169943A (en) | Integrated system for coke oven flue gas desulfurization and denitrification and waste heat recovery | |
| CN216171293U (en) | Low-temperature desulfurization and denitrification system for flue gas of coking plant | |
| CN108392956A (en) | A kind of system for desulfuration and denitration and method for coke oven flue gas | |
| CN113731161B (en) | Low-temperature desulfurization and denitrification method and system for flue gas of coking plant | |
| CN108190986A (en) | A kind of flue is classified pre- thermal evaporation desulfurization wastewater Zero discharging system and its method of work | |
| CN209405955U (en) | Garbage burning boiler flue gas minimum discharge system | |
| CN204582930U (en) | A kind of low cost coal-fired flue-gas multiple pollutant minimum discharge system | |
| CN106178877A (en) | A kind of coke oven flue waste gas purification waste heat recovery apparatus and technique | |
| CN108704464A (en) | A kind of sintering flue gas desulfurization denitration, flue gas disappear white total system and technique | |
| CN216537812U (en) | Low-temperature desulfurization and denitrification system for flue gas of biomass power plant | |
| CN209909935U (en) | Liquid hazardous waste burns system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |