CN221055042U - Flue gas cooling dust pelletizing system - Google Patents

Flue gas cooling dust pelletizing system Download PDF

Info

Publication number
CN221055042U
CN221055042U CN202322330432.6U CN202322330432U CN221055042U CN 221055042 U CN221055042 U CN 221055042U CN 202322330432 U CN202322330432 U CN 202322330432U CN 221055042 U CN221055042 U CN 221055042U
Authority
CN
China
Prior art keywords
flue gas
inlet
outlet
air preheater
cylinder
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
Application number
CN202322330432.6U
Other languages
Chinese (zh)
Inventor
许飞
姜辉
刘晓松
郝栋伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gansu Heng Xin Environment Engineering Technology Co ltd
Original Assignee
Gansu Heng Xin Environment Engineering Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gansu Heng Xin Environment Engineering Technology Co ltd filed Critical Gansu Heng Xin Environment Engineering Technology Co ltd
Priority to CN202322330432.6U priority Critical patent/CN221055042U/en
Application granted granted Critical
Publication of CN221055042U publication Critical patent/CN221055042U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Landscapes

  • Chimneys And Flues (AREA)

Abstract

The utility model discloses a flue gas cooling and dedusting system which is characterized by comprising a dust remover, an air preheater and a cooling device, wherein the dust remover is provided with a first flue gas inlet which is communicated with the air preheater; the flue gas enters the air preheater after entering the dust remover from the first flue gas inlet, and the cooling device is used for cooling the flue gas before the flue gas enters the air preheater. The flue gas cooling and dedusting system can prolong the service life of the air preheater and improve the safety in the use process.

Description

Flue gas cooling dust pelletizing system
Technical Field
The utility model relates to the technical field of flue gas cooling, in particular to a flue gas cooling and dedusting system.
Background
The dust and fuel can generate a large amount of smoke in the combustion process, the smoke is a mixture of gas phase substances and solid phase substances, the gas phase substances mainly comprise carbon dioxide, sulfur dioxide and the like, the solid phase substances are smoke dust, the boiler smoke is grey and even black due to the existence of the smoke dust, the boiler is blocked, dust needs to be removed, common boiler dust removing equipment is provided with a mechanical dust remover, a filter dust remover and the like, the dust and the fuel also emit a large amount of heat in the combustion process, and the dust removing equipment also has high temperature resistance in the dust removing process, but the high temperature smoke enters the air preheater to reduce the service life of the air preheater and possibly bring about explosion and other safety problems, so that the problems are very necessary to be solved.
Disclosure of utility model
In order to overcome the defects of the prior art, the utility model aims to provide a flue gas cooling and dedusting system which can prolong the service life of an air preheater and improve the safety in the use process.
The utility model adopts the following technical scheme:
The flue gas cooling and dedusting system comprises a dust remover, an air preheater and a cooling device, wherein the dust remover is provided with a first flue gas inlet which is communicated with the air preheater; the flue gas enters the air preheater after entering the dust remover from the first flue gas inlet for dust removal, and the cooling device is used for cooling the flue gas before the flue gas enters the air preheater.
Further, the dust remover is provided with a second smoke inlet, the cooling device comprises a heat exchanger, and the heat exchanger is provided with a third inlet and a third outlet; the air preheater is provided with a first outlet, the first outlet is communicated with a third inlet, and the third outlet is communicated with a second smoke inlet.
Further, the second smoke inlet is staggered with the first smoke inlet in the axial direction of the dust remover.
Further, the cooling device also comprises a fan, and the fan is arranged between the third outlet and the second smoke inlet; the fan is provided with a fourth inlet and a fourth outlet, the fourth inlet is communicated with the third outlet, and the fourth outlet is communicated with the second smoke inlet.
Further, the flue gas cooling and dedusting system comprises a spray tower, wherein the spray tower is provided with a third flue gas inlet, and the third outlet is communicated with the third flue gas inlet.
Further, the dust remover is provided with a smoke outlet, the air preheater is also provided with a first inlet, the smoke outlet is communicated with the first inlet, and the smoke outlet is detachably connected with the first inlet; the first inlet communicates with the first outlet.
Further, the air preheater is provided with an air inlet and an air outlet, and the air inlet and the air outlet are arranged on the same side of the air preheater.
Further, the dust remover comprises a first barrel and a second barrel, the first barrel is arranged at the upper end of the second barrel, the inner diameter of the first barrel is gradually reduced to be tangent with the second barrel around the central shaft of the second barrel, the first smoke inlet and the second smoke inlet are all arranged on the first barrel, the first inlet stretches into the second barrel, and the first smoke inlet and the second smoke inlet are all communicated with the first inlet.
Further, one end of the second cylinder body far away from the first cylinder body is a cone part, and the inner diameter of the cone part gradually decreases from one end close to the first cylinder body to one end far away from the first cylinder body.
Further, the flue gas cooling and dedusting system also comprises a furnace body, and the air preheater and the deduster are arranged in the furnace body.
Compared with the prior art, the utility model has the beneficial effects that:
According to the utility model, the flue gas is cooled before entering the air preheater, so that the influence of the high temperature flue gas on the air preheater can be prevented, the deformation or the thermal expansion of the air preheater and even the explosion of the air preheater are avoided, the service life of the air preheater is prolonged, and the safety coefficient of the combustion process is improved.
Drawings
Fig. 1 is a schematic diagram of a flue gas cooling and dedusting system according to the present utility model.
In the figure:
11. A first cylinder; 12. a second cylinder; 121. a cone portion; 131. a first smoke inlet; 132. a second smoke inlet; 133. a third smoke inlet; 14. a smoke outlet;
2. An air preheater; 21. a first inlet; 22. a first outlet; 23. a second inlet; 24. a second outlet;
3. A heat exchanger; 31. a third inlet; 32. a third outlet;
4. a blower; 41. a fourth inlet; 42. a fourth outlet;
5. a spray tower;
6. a furnace body.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.
In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1, the utility model discloses a flue gas cooling and dust removing system, which comprises a dust remover, an air preheater 2 and a cooling device, wherein the dust remover is provided with a first flue gas inlet 131, the first flue gas inlet 131 is communicated with the air preheater, flue gas enters the air preheater after entering the dust remover from the first flue gas inlet 131 for dust removal, and the cooling device is used for cooling the flue gas before the flue gas enters the air preheater 2.
The flue gas cooling and dust removing system is applied to the garbage combustion process of the furnace body 6, the air preheater 2 and the dust remover are specifically arranged in the furnace body 6, flue gas generated by garbage and fuel in combustion enters the dust remover from the first flue inlet and removes dust, the flue gas enters the air preheater 2 after being cooled by the cooling device, and then is subjected to heat exchange with cold air, the flue gas is discharged out of the furnace body 6, and the hot air is directly discharged into the furnace body 6 to provide oxygen for the combustion of the garbage and the fuel.
According to the application, the flue gas is cooled before entering the air preheater 2, so that the influence of the high temperature of the high-temperature flue gas on the air preheater 2 can be prevented, the deformation or the thermal expansion or even the explosion of the air preheater 2 is avoided, the service life of the air preheater 2 is prolonged, and the safety coefficient of garbage combustion is improved.
Further, the dust remover is provided with a second smoke inlet 132, the cooling device comprises a heat exchanger 3, the heat exchanger 3 is provided with a third inlet 31 and a third outlet 32, the air preheater 2 is provided with a first outlet 22, the first outlet 22 is communicated with the third inlet 31, and the third outlet 32 is communicated with the second smoke inlet 132.
On the basis of the structure, when the dust remover just starts to work, the flue gas firstly enters the dust remover from the first flue gas inlet 131, enters the air preheater 2 after dust removal by the dust remover, enters the heat exchanger 3 from the second inlet 31 after heat exchange with cold air, is discharged from the second outlet 32 after heat exchange by the heat exchanger 3, and then enters the dust remover again from the second flue gas inlet 132, so that the temperature of the flue gas which directly enters the dust remover from the first flue gas inlet 131 in the furnace body 6 is higher in the dust remover, the temperature of the flue gas which enters the dust remover from the second flue gas inlet 132 is reduced after heat exchange by the air preheater 2 and the heat exchanger 3, and two flue gases with larger temperature differences exist in the dust remover, so that the flue gas with higher temperature and the flue gas which is subjected to cooling treatment are mixed and form the flue gas with lower temperature after dust removal, and the flue gas temperature entering the air preheater 2 is not very high, and the situation that the air preheater 2 is deformed after being heated by the high temperature flue gas is avoided.
In the embodiment, the second smoke inlet 132 is formed in the dust remover, so that the temperature of the smoke is directly neutralized and reduced in the dust remover, the influence of high-temperature smoke on the dust remover is reduced, the smoke can be circularly removed, the dust removing effect is improved, and the smoke content discharged into the air from the second outlet 22 is effectively reduced.
It should be noted that, in other embodiments, the above cooling device may also be a structure having a cooling function for gas, such as a flue gas cooler in the prior art, where the flue gas cooler is disposed at the first inlet 131, and cools the flue gas before the high-temperature flue gas enters the dust remover, or may be disposed between the dust remover and the air preheater 2, and cool the high-temperature flue gas coming out of the dust remover, so long as the flue gas can cool the high-temperature flue gas before entering the air preheater 2.
Further, in order to make the above-mentioned two flue gas that the temperature phase difference is great can intensive mixing, can advance cigarette mouth 132 with the first cigarette mouth 132 crisscross setting of advancing in the axial direction of dust remover, so, because these two flue gas have different height, different flow direction, the flue gas after entering the dust remover from first cigarette mouth 131 is earlier extensive in the dust remover, and the flue gas that gets into the dust remover from second cigarette mouth 132 is in the flue gas stirring that gets into the dust remover from first cigarette mouth 131 in succession, thereby reached and improved the effect that mixes and improve cooling efficiency, effectively avoid local high temperature flue gas to produce the influence to air preheater 2, improve factor of safety.
In order to further improve the effect of flue gas mixing, the flue gas cooling device further comprises a fan 4, wherein the fan 5 is arranged between the third outlet 32 and the second flue gas inlet 132, the fan 4 is provided with a fourth inlet 41 and a fourth outlet 42, the third outlet 32 is communicated with the fourth inlet 41, and the fourth outlet 42 is communicated with the second flue gas inlet 132. So, the flue gas gets into fourth import 41 from third export 32, under the effect of fan 4, improve the velocity of flow of flue gas for the velocity increase of the flue gas of flowing into second inlet 132 from fourth export 42, because the velocity of the flue gas of entering the dust remover from second inlet 132 and the velocity of the flue gas of entering the dust remover from second inlet 132 differ more under the effect of fan 4, therefore can further improve the mixing effect of flue gas, improve the flue gas cooling efficiency of flue gas cooling dust removal system.
The fan 4 of the present embodiment may be a blower in the prior art, or the like.
On the basis of the above structure, part of the flue gas discharged from the heat exchanger 3 flows back to the dust remover, but the flue gas finally discharged from the heat exchanger 3 still contains smoke dust, so in order to perfect the flue gas cooling dust removal system, the embodiment further comprises a spray tower 5, the spray tower 5 is provided with a third smoke inlet 133, and the third outlet 32 is communicated with the third smoke inlet 133, so that the flue gas discharged from the third outlet 32 of the heat exchanger 3 has two flow directions, one flue gas directly enters the spray tower 5, the spray tower 5 can comprise a spray cooling layer and a demisting layer, the flue gas is fully contacted with liquid in the spray cooling layer to cool, and the liquid takes away the smoke dust from the gas, demists through the demisting layer and is discharged.
Further, since the flue gas enters the air preheater 2 and exchanges heat with the cold air through the heat exchange structure in the air preheater 2, the flue gas and the heat exchange structure are easy to attach the smoke dust on the heat exchange structure when contacting, so that the dust remover is provided with the flue gas outlet 14 for cleaning, the air preheater 2 is correspondingly provided with the first inlet 21, the flue gas outlet 14 is communicated with the first inlet 21, the flue gas outlet 14 is detachably connected with the first inlet 21, and the first inlet 14 is communicated with the first outlet 22.
So, when needs are clean, with outlet 14 and first import 21 separation, then adopt high-pressure squirt etc. wash respectively can, if outlet 14 and first import 21 are fixed connection mode, when needs are washd the structure in the vicinity of outlet 14 and first import 21, receive the restriction of structure, not clean in place, then can hinder the business turn over to the flue gas to influence flue gas cooling dust removal efficiency, therefore air heater 2 and dust remover's detachable connection mode can guarantee the circulation of flue gas to a certain extent, improve flue gas cooling dust removal efficiency.
It should be noted that, the detachable connection manner of the smoke outlet 14 and the first inlet 21 in this embodiment may be a threaded connection or a nut connection.
Further, the air preheater 2 is provided with an air inlet 23 and an air outlet 24, the air inlet 23 and the air outlet 24 are arranged on the same side of the air preheater 2, so that cold air enters the air preheater 2 from the air inlet 23, and as the air inlet 23 and the air outlet 24 are arranged on the same side of the air preheater 2, the cold air carries out a roundabout circulation path in the air preheater 2, and finally is discharged from the air outlet 24, so that the cold air can carry out sufficient heat exchange with high-temperature flue gas, and the flue gas cooling efficiency is improved.
Further, the dust collector of this embodiment may be a cyclone dust collector in the prior art, and the specific dust collector includes a first cylinder 11 and a second cylinder 12, where the first cylinder 1 is disposed at an upper end of the second cylinder 12, an inner diameter of the first cylinder 11 is gradually reduced around a central axis of the second cylinder 12 to be tangential to the second cylinder 12, a first smoke inlet 131 is disposed in the first cylinder 11, the first inlet 11 extends into the second cylinder 12, and both the first smoke inlet 131 and the second smoke inlet 132 are communicated with the first inlet 11.
On the basis of the above structure, after the flue gas enters the first cylinder 11 from the first flue gas inlet 131, the linear motion is converted into the curved motion, the flue gas rotates downwards around the outer wall of the first inlet 14, and the flue gas rotates upwards after reaching the bottom wall of the second cylinder 12, and enters the air preheater 2 from the first inlet 14. The cyclone dust collector is adopted in the embodiment, and the large-particle dust is separated from the gas by utilizing the centrifugal force generated by the rotating dust-containing gas flow, so that the dust collection purpose is achieved, the structure is simple, the power consumption is low, the large-particle dust has a high separation effect, and the filter dust collector in the prior art can be adopted in other embodiments.
Further, in order to increase the swirling speed of the flue gas in the cyclone, the end of the second cylinder 12 away from the first cylinder 11 is a cone portion 121, and the inner diameter of the cone portion 121 gradually decreases from the end near the first cylinder 11 toward the end far from the first cylinder 11.
Thus, when the flue gas rotates around the outer wall of the first inlet 14 to contact the inner wall of the cone 121, on one hand, the flue dust in the flue gas, which is not separated by the centrifugal force, contacts the cone 121, loses inertia force and slides down the inclined inner wall of the cone 121 under the action of gravity. On the other hand, the gas swirls around the central axis of the second cylinder 12, and correspondingly enters the air preheater 2 from the first inlet 14, if the lower end of the second cylinder 12 is not provided with the cone portion 121, the swirling and upward flowing state is not easy to form after the flue gas rotates to the bottom wall of the second cylinder 12, and the rising direction may influence the downward rotating flue gas, so that the dust removal efficiency can be further improved by the cone portion 121.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features.
It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. The flue gas cooling and dedusting system is characterized by comprising a dust remover, an air preheater and a cooling device, wherein the dust remover is provided with a first flue gas inlet which is communicated with the air preheater; the flue gas enters the air preheater after entering the dust remover from the first flue gas inlet, and the cooling device is used for cooling the flue gas before the flue gas enters the air preheater.
2. The flue gas cooling and dust removal system according to claim 1, wherein the dust remover is provided with a second flue gas inlet, and the cooling device comprises a heat exchanger, and the heat exchanger is provided with a third inlet and a third outlet; the air preheater is provided with a first outlet, the first outlet is communicated with the third inlet, and the third outlet is communicated with the second smoke inlet.
3. The flue gas cooling and dust removal system of claim 2, wherein the second flue gas inlet is staggered with the first flue gas inlet in the axial direction of the dust collector.
4. The flue gas cooling and dust removal system of claim 2, wherein the cooling device further comprises a fan, the fan being disposed between the third outlet and the second flue gas inlet; the fan is provided with a fourth inlet and a fourth outlet, the fourth inlet is communicated with the third outlet, and the fourth outlet is communicated with the second smoke inlet.
5. The flue gas cooling and dust removal system according to claim 2, wherein the flue gas cooling and dust removal system comprises a spray tower, the spray tower is provided with a third flue gas inlet, and the third outlet is communicated with the third flue gas inlet.
6. The flue gas cooling and dust removal system according to claim 2, wherein the dust remover is provided with a flue gas outlet, the air preheater is further provided with a first inlet, the flue gas outlet is communicated with the first inlet, and the flue gas outlet is detachably connected with the first inlet; the first inlet communicates with the first outlet.
7. The flue gas cooling and dust removal system according to claim 6, wherein the air preheater is provided with an air inlet and an air outlet, and the air inlet and the air outlet are arranged on the same side of the air preheater.
8. The flue gas cooling and dust removal system of claim 6, wherein the dust remover comprises a first cylinder and a second cylinder, the first cylinder is arranged at the upper end of the second cylinder, the inner diameter of the first cylinder is gradually reduced to be tangent with the second cylinder around the central axis of the second cylinder, the first flue gas inlet and the second flue gas inlet are both arranged in the first cylinder, the first inlet stretches into the second cylinder, and the first flue gas inlet and the second flue gas inlet are both communicated with the first inlet.
9. The flue gas cooling and dust removal system of claim 8, wherein the end of the second cylinder remote from the first cylinder is a cone, and wherein the inner diameter of the cone gradually decreases from the end near the first cylinder toward the end remote from the first cylinder.
10. The flue gas cooling and dust removal system according to any one of claims 1 to 9, further comprising a furnace body, wherein the air preheater and the dust remover are disposed in the furnace body.
CN202322330432.6U 2023-08-29 2023-08-29 Flue gas cooling dust pelletizing system Active CN221055042U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322330432.6U CN221055042U (en) 2023-08-29 2023-08-29 Flue gas cooling dust pelletizing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322330432.6U CN221055042U (en) 2023-08-29 2023-08-29 Flue gas cooling dust pelletizing system

Publications (1)

Publication Number Publication Date
CN221055042U true CN221055042U (en) 2024-05-31

Family

ID=91224134

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322330432.6U Active CN221055042U (en) 2023-08-29 2023-08-29 Flue gas cooling dust pelletizing system

Country Status (1)

Country Link
CN (1) CN221055042U (en)

Similar Documents

Publication Publication Date Title
CN106636502B (en) A kind of high temperature furnace slag wind quenching granulation fluidized-bed combustion boiler waste-heat recovery device
CN202284894U (en) Energy-saving environment-friendly cupola furnace
CN221055042U (en) Flue gas cooling dust pelletizing system
CN207050484U (en) Multifunctional cupola gas cooler
CN205424962U (en) Boiler fume afterheat recovery device
CN202316145U (en) Air-cooled type cyclone dust collector
CN2592262Y (en) Energy-saving efficient desulfurizing and dust eliminating upparatus by residual-heat utilization
CN206570358U (en) A kind of high temperature furnace slag wind quenching is granulated fluidized-bed combustion boiler waste-heat recovery device
CN211782894U (en) Power plant high-temperature flue gas waste heat recovery device with smoke elimination function
CN113293257A (en) Converter flue gas ultra-clean dust removal system and process thereof
CN1218771C (en) Energy-saving high effective desulfurizing and dust control method and equipment using remaining heat
CN207113630U (en) A kind of aluminum melting smelting furnace smoke processing system of energy-conserving and environment-protective
CN111207404A (en) Composite flue gas desulfurization, denitrification, whitening and dedusting integrated equipment
CN217340631U (en) Flue gas treatment system for preheating furnace
CN201050933Y (en) Iron-melting furnace
CN212362073U (en) Composite flue gas desulfurization, denitrification, whitening and dedusting integrated equipment
CN106322988A (en) Cooling circulation system for kiln tail of tunnel kiln
CN109724425A (en) A kind of heat accumulating type flue gas recovery device
CN110938475A (en) Waste heat boiler with synthesis gas recirculation chilling device in coal gasification system
CN2921618Y (en) Waste heat internal dust-removing hot-air furnace
CN208124927U (en) A kind of new Cooling Tower of free from admixture
CN216011711U (en) Secondary aluminum melts aluminium stove
CN213528065U (en) Sintering flue gas desulfurization and denitrification device
CN2409417Y (en) Coal burning hot air furnace
CN215260571U (en) Pulverized coal hot water boiler

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant