CN114484484A - Catalytic cracking flue gas whitening-eliminating chimney - Google Patents

Catalytic cracking flue gas whitening-eliminating chimney Download PDF

Info

Publication number
CN114484484A
CN114484484A CN202210098196.7A CN202210098196A CN114484484A CN 114484484 A CN114484484 A CN 114484484A CN 202210098196 A CN202210098196 A CN 202210098196A CN 114484484 A CN114484484 A CN 114484484A
Authority
CN
China
Prior art keywords
section
inner cylinder
flue gas
cylinder
barrel
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.)
Pending
Application number
CN202210098196.7A
Other languages
Chinese (zh)
Inventor
涂林
卢新军
刘玉英
施程亮
唐永超
孙蓓蓓
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.)
Sinopec Engineering Group Co Ltd
Sinopec Ningbo Engineering Co Ltd
Sinopec Ningbo Technology Research Institute
Original Assignee
Sinopec Engineering Group Co Ltd
Sinopec Ningbo Engineering Co Ltd
Sinopec Ningbo Technology Research Institute
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 Sinopec Engineering Group Co Ltd, Sinopec Ningbo Engineering Co Ltd, Sinopec Ningbo Technology Research Institute filed Critical Sinopec Engineering Group Co Ltd
Priority to CN202210098196.7A priority Critical patent/CN114484484A/en
Publication of CN114484484A publication Critical patent/CN114484484A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • 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
    • 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
    • F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chimneys And Flues (AREA)

Abstract

The invention relates to a catalytic cracking flue gas whitening chimney which comprises an outer barrel and an inner barrel, wherein the diameter of the inner barrel is smaller than that of the outer barrel, a cavity for circulating preheated air is formed between the inner barrel and the outer barrel, and a flue gas circulating channel for a washing tower to complete desulfurization and dust removal is formed in the inner space of the inner barrel. According to the invention, preheated hot air enters the chimney cavity-passing channel from the hot air mixing port of the conical reducing section with the inner diameter gradually increasing from top to bottom of the outer cylinder, flue gas subjected to desulfurization and dust removal by the washing tower passes through the inner channel of the inner cylinder, two gas streams are completely isolated, and the hot air and the flue gas are mixed at the top of the inner cylinder, so that the flue gas is discharged from the top of the chimney after being overheated, and therefore, on the premise of meeting the national standard, the height of the air mixing position is reduced as much as possible, the height of a support steel structure and the span of a steel column are reduced, the occupied space is reduced, no additional load is generated on the original tower equipment, and the project investment and the implementation difficulty are reduced.

Description

Catalytic cracking flue gas whitening-eliminating chimney
Technical Field
The invention relates to the technical field of environmental protection equipment, in particular to a catalytic cracking flue gas whitening chimney.
Background
The flue gas of a catalytic cracking device is always a key environment-friendly monitoring point of oil refining enterprises, most domestic oil refining enterprises establish a large amount of regenerated flue gas desulfurization and denitration devices in a short period after 2010, the flow adopted in the initial stage is mostly two-section type chilling alkali washing, the demisting efficiency of equipment in a tower is lower, the exhaust temperature is high, absorption liquid is in direct contact with high-temperature flue gas, the moisture content of the flue gas is increased, the flue gas is humidified and cooled to a saturated state, purified flue gas with saturated humidity is not overheated and is discharged into the atmosphere from a chimney, the discharged wet flue gas is in contact with and mixed with lower-temperature ambient air, the flue gas is rapidly cooled in the process, the contained water vapor in the flue gas is supersaturated and condensed, the condensed water drops refract and scatter light, the light transmittance is reduced, and the phenomenon of white smoke plume visible to the naked eyes appears. When white smoke occurs, particularly in winter, the environmental temperature is low, and besides the social influence caused by visual pollution, the white smoke falls to the periphery of the wet washing tower in a rainfall manner, so that salt deposition and corrosion on the surface of equipment are caused.
The transformation of white smoke elimination usually changes the temperature or humidity of smoke, avoids the phenomenon of 'white smoke' caused by supersaturation and condensation due to the reduction of smoke temperature in the process of mixing smoke and ambient air, namely, the smoke temperature is reduced through smoke condensation, the condensed moisture is extracted, the absolute moisture content of smoke exhaust is reduced, and the temperature difference between the smoke and the ambient air is reduced; and then, the temperature of the flue gas is increased by heating the flue gas, so that the flue gas at the outlet of the chimney is overheated, and the parameters are far away from the saturation curve, thereby eliminating white smoke.
The flue gas reheating is divided into direct heating and indirect heating. During direct heating, the flue gas is directly heated by steam, heating medium water or electricity in the chimney section, but a heat exchanger needs to be arranged at the top of the chimney, so that the load and the like of the original absorption tower and a frame can be influenced for the improvement of a device, and the implementation difficulty is high; indirect heating usually first preheats the air with the heating medium water or steam. The hot air boosted by the fan is mixed with the flue gas at the tail end of the chimney to achieve the effect of raising the temperature of the flue gas, the indirectly heated heat exchange equipment is uniformly arranged on the ground or a low-layer frame, the practicability is higher, but the air mixing position is generally required to be behind a CEMS sampling point and the national standard HJ 75 fixed pollution source flue gas (SO) needs to be met2NOx and particulate matters) emission continuous monitoring technical specification, the requirements of the straight pipe sections of the front four and the back two are met, due to the characteristic that the caliber of a chimney is large, the air mixing position is often more than 50 meters, and in addition, the diameter of a hot air pipe is 1-2 meters, so that the challenges are provided for the height, the cost and the practicability of a support steel structure of the hot air pipe attached to the tower.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a catalytic cracking flue gas whitening elimination chimney, which reduces the height of a wind mixing position as much as possible on the premise of meeting the requirements of national standards and CEMS point straight pipe sections in the whitening elimination and reconstruction process of the prior catalytic cracking device, thereby reducing the height of a support steel structure and the span of a steel column, reducing the occupied area, generating no additional load on the prior tower equipment, and reducing the project investment and the implementation difficulty.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a catalytic cracking flue gas whitening chimney comprises:
the outer cylinder comprises an upper section of the outer cylinder and a lower section of the outer cylinder which are mutually connected from top to bottom, the upper section of the outer cylinder is a circular cylinder, the lower section of the outer cylinder is a conical reducing section with the inner diameter gradually increasing from top to bottom, and a hot air mixing inlet is formed in the lower section of the outer cylinder;
the inner cylinder is sleeved in the outer cylinder and comprises an upper inner cylinder section, a middle inner cylinder section and a lower inner cylinder section which are mutually connected from top to bottom, the upper inner cylinder section and the middle inner cylinder section are circular cylinders, the lower inner cylinder section is a conical reducing section with the inner diameter gradually increasing from top to bottom, and the lower inner cylinder section is positioned at the lower part of the lower outer cylinder section;
the diameter of the inner cylinder is smaller than that of the outer cylinder, a cavity for the circulation of preheated air is formed between the inner cylinder and the outer cylinder, and a channel for the circulation of flue gas for the desulfurization and dust removal of the washing tower is formed in the inner space of the inner cylinder.
Preferably, the cross-sectional area of the cavity is 1 to 1.5 times the sum of the cross-sectional areas of the hot air mixing openings on the outer cylinder.
Preferably, the height of the lower section of the inner cylinder is lower than that of the lower section of the outer cylinder, and the reducing gradient of the lower section of the inner cylinder is greater than or equal to that of the lower section of the outer cylinder. Because the existence of the height difference and the gradient difference increases the cavity gap between the conical reducing sections with the inner diameters gradually increasing from top to bottom, the impact of hot air on the inner cylinder of the chimney can be effectively slowed down, and the uniform distribution and the steady flow of the hot air are realized.
Preferably, the top of the cavity is provided with a top ring plate, one side of the top ring plate is welded with the inner wall surface of the upper section of the outer barrel, the other side of the top ring plate is welded with the top surface of the upper section of the inner barrel, and the top end of the upper section of the inner barrel is provided with a square hole. The sum of the sectional areas of the square holes is larger than that of the cavity.
Preferably, a bottom ring plate is arranged at the bottom end of the lower section of the inner cylinder, one side of the bottom ring plate is welded with the inner wall surface of the body section of the washing tower barrel, the other side of the bottom ring plate is welded with the bottom end of the lower section of the inner cylinder, and in order to provide enough strength for supporting the inner cylinder, an inner cylinder reinforcing rib plate for supporting the inner cylinder is further arranged below the bottom ring plate.
Preferably, the lower part of the upper section of the inner cylinder is provided with a plurality of first sampling ports, the first sampling ports comprise CEMS sampling ports and/or manual sampling ports, and the first sampling ports penetrate through the cavity and are only directly communicated with the inner cylinder. The first sampling port is positioned below the square hole at the upper section of the inner cylinder, the distance from the first sampling port to the lower section of the inner cylinder is 4 times of the diameter of the inner cylinder, and the distance from the first sampling port to the lower edge of the square hole at the upper section of the inner cylinder is 2 times of the diameter of the inner cylinder. The structure meets the requirements of national standards or local standards on the front and rear straight pipe sections of particulate matters and gas pollutants, and determines the length of the inner cylinder of the chimney and the height of the lower boundary of the square hole at the upper section of the inner cylinder from the requirements, so that air mixing after CEMS sampling under the premise of meeting the national standards is realized.
Preferably, the middle part of the upper section of the outer barrel is provided with a second manual sampling port, and the second manual sampling port is only connected with the cavity.
Preferably, an inspection manhole is further arranged on the lower section of the outer barrel at the lower part of the outer barrel, and inspection drainage condensation ports which are symmetrically distributed are arranged on the bottom annular plate at the bottom of the cavity.
In order to solve the problem of thermal expansion caused by temperature difference of different media in the inner cylinder, the outer cylinder and the cavity, a refractory ceramic fiber cotton layer with the same thickness as the inner cylinder is arranged between the upper section of the inner cylinder and the middle section of the inner cylinder, an inner ring plate and an outer ring plate are arranged on two sides of the fiber cotton layer, and the bottom surfaces of the lower parts of the inner ring plate and the outer ring plate are welded and fixed with the inner wall surface and the outer wall surface of the middle section of the inner cylinder. Preferably, in order to facilitate the installation of the upper section of the inner cylinder, the upper end of the inner annular plate is bent at a small angle towards the inside, and similarly, the upper end of the outer annular plate is bent at a small angle towards the outside.
In order to better support the inner cylinder, a plurality of connecting plates are arranged on the upper section of the inner cylinder, penetrate through the inner cylinder and the outer cylinder and are welded and sealed with the inner cylinder and the outer cylinder. Preferably, the inner side of the inner cylinder is provided with reinforcing ribs from top to bottom.
The invention effectively solves the problem that hot air is mixed at a high point when the existing device is used for white smoke elimination transformation, the connecting position of the hot air is reduced to the front of a CEMS sampling port to the maximum extent, and the actual mixing position of the hot air and the flue gas meets the requirements of national standard on a CEMS sampling port straight pipe section, so that the length of a large-caliber hot air pipeline is effectively reduced, the additional load of the original washing tower is reduced, the height of a steel frame for supporting an air pipe is effectively reduced, the instability and the overturning risk of a small-section high frame are avoided, and the investment and the construction difficulty are reduced; the multi-section inner cylinder is ingeniously adopted, the arranged fireproof ceramic fiber cotton layer effectively solves the problem of thermal expansion of the outer cylinder, the cavity and the inner cylinder in contact with ambient air, hot air and smoke caused by different temperatures, the inner cylinder is sealed through self weight of the inner cylinder, and the structure is reasonable. Compared with the traditional expansion joint, the expansion joint can avoid fatigue fracture caused by long-term wind load vibration at the top of the chimney, effectively prevent the hot air and the flue gas from streaming and short-circuiting in advance, and prolong the service life; when the existing device is subjected to white elimination transformation, the CEMS sampling point height can be completely ensured to be consistent with the original installation position, and the sampling port of the outer barrel cavity is arranged, so that hot air can be rechecked without mixing with flue gas in advance, and the environmental protection requirement is met.
Compared with the prior art, the invention has the advantages that: according to the invention, preheated hot air enters the chimney cavity-passing channel from the hot air mixing port of the conical reducing section with the inner diameter gradually increasing from top to bottom of the outer cylinder, flue gas subjected to desulfurization and dust removal by the washing tower passes through the inner channel of the inner cylinder, two gas streams are completely isolated, and the hot air and the flue gas are mixed at the top of the inner cylinder, so that the flue gas is discharged from the top of the chimney after being overheated, and therefore, on the premise of meeting the national standard, the height of the air mixing position is reduced as much as possible, the height of a support steel structure and the span of a steel column are reduced, the occupied space is reduced, no additional load is generated on the original tower equipment, and the project investment and the implementation difficulty are reduced.
Drawings
FIG. 1 is a schematic plan view of a structure according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic diagram of a lower ring plate structure according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of inner barrel splicing in an embodiment of the present invention;
FIG. 6 is a schematic diagram of a connection plate according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 6, the catalytic cracking flue gas whitening chimney of the present embodiment includes:
the outer cylinder comprises an upper section 1 of the outer cylinder and a lower section 2 of the outer cylinder which are mutually connected from top to bottom, wherein the upper section 1 of the outer cylinder is a circular cylinder, the lower section 2 of the outer cylinder is a conical reducing section with gradually increasing inner diameter from top to bottom, and a hot air mixing inlet 12 is arranged on the lower section 2 of the outer cylinder;
the inner cylinder is sleeved in the outer cylinder and comprises an upper inner cylinder section 4, a middle inner cylinder section 5 and a lower inner cylinder section 6 which are mutually connected from top to bottom, the upper inner cylinder section 4 and the middle inner cylinder section 5 are circular cylinders, the lower inner cylinder section 6 is a conical reducing section with the inner diameter gradually increasing from top to bottom, and the lower inner cylinder section 6 is positioned at the lower part of the lower outer cylinder section 2;
the diameter of the inner cylinder is smaller than that of the outer cylinder, a cavity 100 for the circulation of preheated air is formed between the inner cylinder and the outer cylinder, and a channel for the circulation of flue gas for the desulfurization and dust removal of the washing tower is formed in the inner space of the inner cylinder.
The cross-sectional area of the cavity is 1 to 1.5 times of the sum of the cross-sectional areas of the hot air mixing openings on the outer cylinder.
The height of the lower section 6 of the inner cylinder is lower than that of the lower section 2 of the outer cylinder, and the diameter-changing gradient of the lower section 6 of the inner cylinder is greater than that of the lower section 2 of the outer cylinder.
The top of the cavity 100 is provided with a top ring plate 7, one side of the top ring plate 7 is welded with the inner wall surface of the outer cylinder upper section 1 of the outer cylinder, the other side of the top ring plate 7 is welded with the top surface of the inner cylinder upper section 4 of the inner cylinder, and the top end of the inner cylinder upper section 4 of the inner cylinder is provided with four square holes 17.
The bottom end of the inner cylinder lower section 6 of the inner cylinder is provided with a bottom ring plate 8, one side of the bottom ring plate 8 is welded with the inner wall surface of the washing tower cylinder section 3, the other side of the bottom ring plate 8 is welded with the bottom end of the inner cylinder lower section 6 of the inner cylinder, and twenty inner cylinder reinforcing rib plates 9 used for supporting the inner cylinder are further arranged below the bottom ring plate 8.
The lower part of the inner barrel upper section 4 of the inner barrel is provided with a plurality of first sampling ports 11, the first sampling ports comprise CEMS sampling ports and/or manual sampling ports, and the first sampling ports 11 all penetrate through the cavity 100 and are only directly communicated with the inner barrel.
The first sampling port 11 is positioned below the square hole 17 of the upper section 4 of the inner cylinder, and the distance from the first sampling port 11 to the lower section 6 of the inner cylinder is 4 times of the diameter of the inner cylinder, and the distance from the first sampling port 11 to the lower edge of the square hole 17 of the upper section 4 of the inner cylinder is 2 times of the diameter of the inner cylinder.
The middle part of the upper section 1 of the outer barrel is provided with a second manual sampling port 10, and the second manual sampling port 10 is only connected with the cavity 100.
An inspection manhole 15 is further arranged on the lower section 2 of the outer barrel at the lower part of the outer barrel, and symmetrically distributed inspection drainage condensation ports 16 are arranged on the bottom annular plate 8 at the bottom of the cavity 100.
A refractory ceramic fiber cotton layer 18 with the same thickness as the inner cylinder is arranged between the inner cylinder upper section 4 and the inner cylinder middle section 5 of the inner cylinder, an inner ring plate 20 and an outer ring plate 19 are arranged on two sides of the fiber cotton layer, and the bottom surfaces of the lower parts of the inner ring plate 20 and the outer ring plate 19 are welded and fixed with the inner wall surface and the outer wall surface of the inner cylinder middle section 5 of the inner cylinder. To facilitate the mounting of the inner barrel upper section 4, the upper end of the inner annular plate 20 is bent inwardly at a small angle and similarly the upper end of the outer annular plate 19 is bent outwardly at a small angle.
In order to better support the inner cylinder, six connecting plates 14 are further arranged on the upper section 4 of the inner cylinder, and the connecting plates 14 penetrate through the inner cylinder and the outer cylinder and are welded and sealed with the inner cylinder and the outer cylinder. The inner side of the inner cylinder is provided with reinforcing ribs 13 from top to bottom.
When the device is used, flue gas which is desulfurized and dedusted from any existing washing tower enters a chimney inner barrel channel from the conical reducing section of the inner barrel lower section 6 of the chimney inner barrel, preheated hot air enters a chimney cavity 100 channel from a hot air mixing port of the conical reducing section of the outer barrel lower section 2 of the outer barrel, the inner diameter of the hot air is gradually increased from top to bottom, two streams of gas are completely isolated, and the hot air is mixed with the flue gas through the square hole 17 at the top of the inner barrel, so that the flue gas is overheated and then is discharged from the top of the chimney.
Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (10)

1. A catalytic cracking flue gas whitening-eliminating chimney is characterized by comprising:
the outer cylinder comprises an upper outer cylinder section (1) and a lower outer cylinder section (2) which are mutually connected from top to bottom, the upper outer cylinder section (1) is a circular cylinder, the lower outer cylinder section (2) is a conical reducing section with the inner diameter gradually increasing from top to bottom, and a hot air mixing inlet (12) is formed in the lower outer cylinder section (2);
the inner cylinder is sleeved in the outer cylinder and comprises an upper inner cylinder section (4), a middle inner cylinder section (5) and a lower inner cylinder section (6) which are mutually connected from top to bottom, the upper inner cylinder section (4) and the middle inner cylinder section (5) are circular cylinders, the lower inner cylinder section (6) is a conical reducing section with the inner diameter gradually increasing from top to bottom, and the lower inner cylinder section (6) is positioned at the lower part of the lower outer cylinder section (2);
the diameter of the inner cylinder is smaller than that of the outer cylinder, a cavity (100) for preheating air circulation is formed between the inner cylinder and the outer cylinder, and a channel for flue gas circulation of the washing tower for completing desulfurization and dust removal is formed in the inner space of the inner cylinder.
2. The catalytic cracking flue gas whitening chimney according to claim 1, characterized in that: the sectional area of the cavity is 1 to 1.5 times of the sum of the sectional areas of the hot air mixing openings on the outer cylinder.
3. The catalytic cracking flue gas whitening chimney according to claim 1, characterized in that: the height of the inner cylinder lower section (6) of the inner cylinder is lower than that of the outer cylinder lower section (2) of the outer cylinder, and the diameter-changing gradient of the inner cylinder lower section (6) is greater than or equal to that of the outer cylinder lower section (2).
4. The catalytic cracking flue gas whitening chimney according to claim 1, 2 or 3, characterized in that: the top of the cavity (100) is provided with a top ring plate (7), one side of the top ring plate (7) is welded with the inner wall surface of the outer barrel upper section (1) of the outer barrel, the other side of the top ring plate (7) is welded with the top surface of the inner barrel upper section (4) of the inner barrel, and the top end of the inner barrel upper section (4) of the inner barrel is provided with a square hole (17).
5. The catalytic cracking flue gas whitening chimney according to claim 4, characterized in that: the washing tower is characterized in that a bottom ring plate (8) is arranged at the bottom end of the lower section (6) of the inner barrel, one side of the bottom ring plate (8) is welded with the inner wall surface of the washing tower barrel section (3), the other side of the bottom ring plate (8) is welded with the bottom end of the lower section (6) of the inner barrel, and an inner barrel reinforcing rib plate (9) used for supporting the inner barrel is further arranged below the bottom ring plate (8).
6. The catalytic cracking flue gas whitening chimney according to claim 4, characterized in that: the lower part of the upper section (4) of the inner cylinder is provided with a plurality of first sampling ports (11), the first sampling ports comprise CEMS sampling ports and/or manual sampling ports, and the first sampling ports (11) penetrate through the cavity (100) and are only directly communicated with the inner cylinder.
7. The catalytic cracking flue gas whitening chimney according to claim 6, characterized in that: the first sampling port (11) is positioned below a square hole (17) of the upper section (4) of the inner cylinder, and the distance from the first sampling port (11) to the lower section (6) of the inner cylinder is 4 times of the diameter of the inner cylinder and the distance from the first sampling port to the lower edge of the square hole (17) of the upper section (4) of the inner cylinder is 2 times of the diameter of the inner cylinder.
8. The catalytic cracking flue gas whitening chimney according to claim 6, characterized in that: the middle part of the outer barrel upper section (1) of the outer barrel is provided with a second manual sampling port (10), and the second manual sampling port (10) is only connected with the cavity (100).
9. The catalytic cracking flue gas whitening chimney according to claim 1, 2 or 3, characterized in that: an inspection manhole (15) is further arranged on the lower section (2) of the outer barrel at the lower part of the outer barrel, and symmetrically distributed inspection drainage orifices (16) are arranged on the bottom annular plate (8) at the bottom of the cavity (100).
10. The catalytic cracking flue gas whitening chimney according to claim 1, 2 or 3, characterized in that: a refractory ceramic fiber cotton layer (18) with the same thickness as the inner cylinder is arranged between the inner cylinder upper section (4) and the inner cylinder middle section (5) of the inner cylinder, an inner ring plate (20) and an outer ring plate (19) are arranged on two sides of the fiber cotton layer, and the bottom surfaces of the lower parts of the inner ring plate (20) and the outer ring plate (19) are fixedly welded with the inner wall surface and the outer wall surface of the inner cylinder middle section (5) of the inner cylinder.
CN202210098196.7A 2022-01-19 2022-01-19 Catalytic cracking flue gas whitening-eliminating chimney Pending CN114484484A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210098196.7A CN114484484A (en) 2022-01-19 2022-01-19 Catalytic cracking flue gas whitening-eliminating chimney

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210098196.7A CN114484484A (en) 2022-01-19 2022-01-19 Catalytic cracking flue gas whitening-eliminating chimney

Publications (1)

Publication Number Publication Date
CN114484484A true CN114484484A (en) 2022-05-13

Family

ID=81475845

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210098196.7A Pending CN114484484A (en) 2022-01-19 2022-01-19 Catalytic cracking flue gas whitening-eliminating chimney

Country Status (1)

Country Link
CN (1) CN114484484A (en)

Similar Documents

Publication Publication Date Title
CN103968406B (en) A kind of hydrophily flue gas-smoke heat exchanging system and method that can prevent low temperature corrosion
CN104891486B (en) Graphitization furnace with high heat insulation performance
CN108426458A (en) A kind of glass furnace fume bypass system for desulfuration and denitration
CN114484484A (en) Catalytic cracking flue gas whitening-eliminating chimney
CN201476597U (en) Ceramic kiln smoke purifying and surplus heat comprehensive utilization device
CN107676967B (en) Energy-saving environment-friendly oil-and-natural gas-fired boiler
CN205535702U (en) Vertical no pipe fuel, gas steam generator
CN114484489A (en) Air mixing and heating process for eliminating white smoke of catalytic cracking
CN202141326U (en) Flue heat exchange device for tunnel kiln
CN206055664U (en) Power plant's wet desulfurization system
CN210786816U (en) Integrated denitration reactor with white removing mechanism
CN106765202A (en) It is the waste heat utilization system and method for the spent acid pyrolysis furnace of raw material containing organic Waste Sulfuric Acid
CN113801974A (en) Converter gas cooling device and cooling system using same
CN203549797U (en) High-temperature corrosion prevention coking device for membrane wall type boiler
CN201476043U (en) Steam air preheater
CN208186346U (en) A kind of controllable mixing disperse formula heat storage burner
CN102218526B (en) High-efficiency and energy-saving roasting device for steel ladles
CN202022840U (en) Novel glass kiln
CN203518238U (en) Vehicle-mounted horizontal fuel oil and fuel gas molten salt furnace
CN209679828U (en) A kind of efficient flue gas takes off white system
CN205137503U (en) Flue gas waste heat recovery device
CN109731445A (en) A kind of low energy consumption white cigarette cancellation element proposing effect function with desulfurization
CN206008355U (en) A kind of device of use microwave applicator heating boiler flue gas
CN204268465U (en) A kind of gas fired-boiler
CN213777755U (en) Acid gas incinerator containing hydrogen sulfide

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication