CN113063158A - Compact anti-blocking radioactive flue gas cooling device - Google Patents

Compact anti-blocking radioactive flue gas cooling device Download PDF

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Publication number
CN113063158A
CN113063158A CN202110296458.6A CN202110296458A CN113063158A CN 113063158 A CN113063158 A CN 113063158A CN 202110296458 A CN202110296458 A CN 202110296458A CN 113063158 A CN113063158 A CN 113063158A
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CN
China
Prior art keywords
flue gas
cone
water
radioactive
cooling
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
CN202110296458.6A
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Chinese (zh)
Inventor
褚浩然
张禹
徐卫
郑博文
李晓海
张晓斌
杨利国
李串莲
贾成明
杨丽莉
阮佳晟
崔晗
王鹏
陈睿
胡磊
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China Institute for Radiation Protection
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China Institute for Radiation Protection
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Publication date
Application filed by China Institute for Radiation Protection filed Critical China Institute for Radiation Protection
Priority to CN202110296458.6A priority Critical patent/CN113063158A/en
Publication of CN113063158A publication Critical patent/CN113063158A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/16Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chimneys And Flues (AREA)

Abstract

The invention relates to a compact anti-blocking radioactive flue gas cooling device which comprises an inner shell, an ash hopper arranged at the bottom of the inner shell, and an air inlet pipe arranged at the top of the inner shell and communicated with the inner shell, wherein the inner shell comprises a cylinder body and a cone body connected with the cylinder body, a reflecting screen is arranged at the bottom of the cone body, air holes are formed in the top of the reflecting screen, an annular gap is formed between the reflecting screen and the inner wall of the cone body, and the inner cavity of the cone body is communicated with the inner cavity of the ash hopper through the air holes in the reflecting screen and. The outer side of the inner shell is provided with a water-cooling jacket, the water-cooling jacket is coated on the outer sides of the cylinder and the cone, and two ends of the water-cooling jacket are respectively connected with a cooling water inlet pipe and a cooling water outlet pipe. When the device is used, the high-temperature flue gas moves along the inner shell of the device and is simultaneously contacted with the water-cooled wall, so that the cooling effect is achieved; meanwhile, the high-temperature dust-containing flue gas tangentially enters the device, and the particles in the flue gas can be preliminarily trapped and dedusted by the centrifugal force.

Description

Compact anti-blocking radioactive flue gas cooling device
Technical Field
The invention relates to the field of radioactive high-temperature flue gas cooling and purification, in particular to a compact anti-blocking radioactive flue gas cooling device.
Background
Nuclear facilities such as military industry, scientific research, experiment and nuclear power station can generate a large amount of radioactive wastes in the operation and maintenance process, wherein the combustible wastes account for a large amount (about 50 percent) such as plastics, rubber, cotton, wood, resin and wasteOil, etc., and most of the solid combustible waste has an average specific activity of less than or equal to 1 x 105Bq/kg. Incineration is one of the earliest radioactive waste volume reduction technologies, is very suitable for treating low-level radioactive solid wastes, can realize great volume reduction (the volume reduction ratio can reach 80-120), can realize the inorganic treatment of wastes, and is beneficial to final treatment. Therefore, the incineration technology of radioactive combustible solid waste is widely used in the united states, france, germany, japan, and the like, and is one of the main technologies for treating radioactive waste.
At present, a large number of military industry, scientific research and production units in China generate radioactive waste with low activity concentration, single type of pollution nuclide, relatively simple type and small production amount, and the radioactive waste is not suitable for independently establishing a large-scale fixed-site radioactive waste incinerator. The flue gas discharged from the radioactive combustible waste incinerator contains a large amount of radioactive components and non-radioactive pollutants, and the temperature is about 1000 ℃, so that the flue gas can be discharged into the atmosphere after being effectively cooled and purified. For the conventional flue gas cooling equipment, particularly in the form of a tubular heat exchanger, the inner tube is thin, and is easily blocked by particulate matters such as smoke dust in flue gas in the long-term operation process, and because the smoke dust contains radioactive substances, the blocked cooling equipment is not easy to clean and maintain; meanwhile, the conventional flue gas cooling device does not have the function of primarily separating particulate matters in the flue gas, particulate matter separation equipment needs to be added in subsequent processes, and the design requirement of compact integration cannot be met. This patent is to current technical problem, designs a radioactivity flue gas cooling device is prevented blockking up by compact.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a compact anti-blocking radioactive flue gas cooling device.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a radioactive flue gas cooling device is prevented blockking up to compact, includes interior casing, installs the ash bucket in interior casing bottom, sets up including the casing top and with the intake pipe of interior casing intercommunication, interior casing includes the barrel and the cone of being connected with the barrel, the bottom of cone is equipped with the reflecting screen, the reflecting screen top is equipped with the bleeder vent, has annular gap between the inner wall of reflecting screen and cone, the inner chamber of cone pass through the bleeder vent on the reflecting screen and the inner chamber intercommunication of annular gap and ash bucket.
Furthermore, the outer side of the inner shell is provided with a water-cooling jacket, the water-cooling jacket is coated on the outer sides of the cylinder body and the cone, and two ends of the water-cooling jacket are respectively connected with a cooling water inlet pipe and a cooling water outlet pipe.
Furthermore, the reflecting screen is conical, and the skirt part of the reflecting screen is positioned above the ash bucket.
Further, the top of the cylinder is connected with an exhaust pipe.
Further, the barrel and the cone of interior casing integrated into one piece, the cone is the back taper shape.
Furthermore, the cooling water inlet pipe is positioned at the bottom of the water-cooling jacket, the cooling water outlet pipe is positioned at the top of the water-cooling jacket, and the flow direction of cooling water in the water-cooling jacket is vertically crossed with the flow direction of high-temperature flue gas in the inner shell.
Furthermore, the air inlet pipe is tangentially connected with the cylinder, and the smoke enters the cylinder through the air inlet pipe tangentially.
The invention has the beneficial effects that: when the device is used, the high-temperature flue gas moves along the inner shell of the device and is simultaneously contacted with the water-cooled wall, so that the cooling effect is achieved; meanwhile, the high-temperature dust-containing flue gas tangentially enters the device, and the particles in the flue gas can be preliminarily trapped and dedusted by the centrifugal force. The device can realize two kinds of functions of preliminary dust removal and cooling of radioactive high temperature flue gas simultaneously, and compact structure is applicable to the flue gas cooling clean system that integrates the radioactive waste incineration device of compactification very much.
In addition, the tangential air inlet structure design can realize the primary separation and collection of particulate matters in the flue gas while cooling the flue gas, prevent the blockage of the flue, and through the compact structure design, the equipment volume is minimized, the high-efficiency cooling and the primary purification of the radioactive flue gas are realized, the probability of maintenance is greatly reduced, and the reliability is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a top view of the air inlet tube of the present invention connected to the inner housing.
Detailed Description
As shown in fig. 1, fig. 2 shows, a radioactivity flue gas cooling device is prevented blockking up to compact, including interior casing, install ash bucket 5 in interior casing bottom, casing top and intake pipe 1 with interior casing intercommunication including the setting, intake pipe 1 is connected with barrel 2 tangential, the flue gas passes through intake pipe 1 and gets into in barrel 2 along the tangential, interior casing includes barrel 2 and the cone 3 of being connected with barrel 2, barrel 2 and cone 3 integrated into one piece, cone 3 is the back taper shape, the bottom of cone 3 is equipped with reflecting screen 4, reflecting screen 4 top is equipped with the bleeder vent, have the annular gap between the inner wall of reflecting screen 4 and cone 3, the inner chamber of cone 3 passes through bleeder vent and the inner chamber intercommunication of annular gap and ash bucket 5 on the reflecting screen 4.
Further, a water-cooling jacket 7 is arranged on the outer side of the inner shell, the water-cooling jacket 7 covers the outer sides of the cylinder body 2 and the cone body 3, and two ends of the water-cooling jacket 7 are respectively connected with a cooling water inlet pipe 8 and a cooling water outlet pipe 9. The cooling water inlet pipe 8 is positioned at the bottom of the water-cooling jacket 7, the cooling water outlet pipe 9 is positioned at the top of the water-cooling jacket 7, and the flow direction of cooling water in the water-cooling jacket 7 is vertically crossed with the flow direction of high-temperature flue gas in the inner shell.
The reflecting screen 4 is conical, and the skirt part of the reflecting screen 7 is positioned above the ash hopper 5. The top of the cylinder 2 is connected with an exhaust pipe 6.
Further, in the embodiment, the air inlet pipe 1 is made of heat-resistant stainless steel and is rectangular, one end of the air inlet pipe is positioned on the side surface of the upper part of the cylinder 2, the air inlet pipe is communicated tangentially, and the air inlet pipe and the cylinder are welded to form a whole; one end of the device is connected with an upstream flue gas pipeline through a flange, and high-temperature dust-containing flue gas enters the device;
the cylinder body 2 is made of heat-resistant stainless steel, is cylindrical, is connected with the air inlet pipe 1 and the exhaust pipe 6, has a closed top, and is welded at the bottom with the top of the cone 3 to form a whole;
the cone 3 is made of heat-resistant stainless steel and is in an inverted cone shape, the upper part of the cone is small, the lower part of the cone is large, and the bottom of the cone and the top of the ash bucket 5 form a whole by welding;
the reflecting screen 4 is made of heat-resistant stainless steel, is in an inverted cone shape, is small at the top and large at the bottom, is positioned at the joint of the cone 3 and the ash bucket 5 at the lower part, forms a whole body in a support mode and the like, and has an annular gap with the bottom of the cone 3; the upper part is provided with air holes, and the annular gap, the taper of the reflecting screen 4 and the size of the air holes are proper so as to improve the dust removal efficiency and reduce the pressure loss;
the ash hopper 5 is made of heat-resistant stainless steel and is cylindrical, the top of the ash hopper and the bottom of the cone 3 are welded to form a whole, and the bottom of the ash hopper is connected with an ash discharge device;
the exhaust pipe 6 is made of heat-resistant stainless steel and is circular, one end of the exhaust pipe is inserted into the cylinder 2 through the top of the cylinder and is welded to form a whole, and the insertion depth is slightly lower than that of the air inlet pipe 1; one end of the device is connected with a downstream flue gas pipeline through a flange, and the flue gas after primary dust removal and temperature reduction is discharged out of the device;
the water-cooling jacket 7 is made of stainless steel, covers the shell of the air inlet pipe 1, the cylinder 2 and the cone 3, is connected with a cooling water inlet pipe 8 at the bottom and a cooling water outlet pipe 9 at the top, and is welded to form a whole;
the cooling water inlet pipe 8 is made of stainless steel and is positioned at the bottom of the water cooling jacket 7, one end of the cooling water inlet pipe is integrated with the water cooling jacket 7 through welding, the other end of the cooling water inlet pipe is connected with a cooling water supply system through a flange or threads, and cooling water enters the water cooling jacket 7;
the cooling water outlet pipe 9 is made of stainless steel and is positioned at the top of the water cooling jacket 7, one end of the cooling water outlet pipe is welded with the water cooling jacket 7 to form a whole, the other end of the cooling water outlet pipe is connected with a cooling water discharge system through a flange or threads, and cooling water after heat exchange is discharged out of the water cooling jacket 7.
When the device works, radioactive high-temperature dust-containing flue gas enters the device barrel 2 through the rectangular air inlet pipe 1 along the tangential direction, and dust is separated from the wall surface of the device under the action of centrifugal force and moves downwards along with the flue gas in a rotating mode to reach the cone 3. The cone 3 is in an inverted cone shape, the upper part of the cone is small, the lower part of the cone is large, and the distance from the wall of the cone to the center of the cone is gradually increased, so that the possibility that dusty gas is short-circuited to the exhaust pipe from the center of the cone is reduced. When the dust-containing smoke moves to the bottom of the cone 3, most of the smoke rotates and rises under the reflection action of the reflecting screen 4 and is discharged through the exhaust pipe 6. A small part of flue gas enters the ash bucket 5 along with dust through an annular gap between the reflecting screen 4 and the cone 3, the speed of the flue gas entering the ash bucket 5 is reduced, the dust falls into the ash bucket 5 and is discharged and collected through the ash discharging device due to the inertia effect, and the flue gas rises through the air holes of the reflecting screen 4 to the exhaust pipe 6 to be discharged, so that the dust removal of the radioactive high-temperature dust-containing flue gas is realized. The setting of reflecting screen 4 has prevented that the purification flue gas that rises from curling up the tiny dust again and taking away, therefore has improved dust collection efficiency, and reflecting screen 4 tapering and top bleeder vent diameter to and the annular space size between reflecting screen 4 and the cone 3 is suitable, with improvement dust collection efficiency, reduction loss of pressure.
Meanwhile, the water cooling jacket 7 covers the outer part of the inner shell, the cooling water adopts a lower inlet and upper outlet mode, when the radioactive high-temperature dust-containing flue gas swirls downwards along the wall surface in the device, the radioactive high-temperature dust-containing flue gas can contact the water cooling wall, the flowing directions of the high-temperature flue gas and the cooling water are mutually vertical and crossed, and the high-temperature flue gas and the cooling water exchange heat through heat conduction of the wall surface and convection of cold and hot fluids on the wall surface, so that the aim of cooling the high-temperature flue gas is fulfilled.
In conclusion, the high-temperature flue gas moves along the inner shell of the device and is simultaneously contacted with the water-cooled wall, so that the cooling effect is achieved; meanwhile, the high-temperature dust-containing flue gas tangentially enters the device, and the particles in the flue gas can be preliminarily trapped and dedusted by the centrifugal force. The device can realize two kinds of functions of preliminary dust removal and cooling of radioactive high temperature flue gas simultaneously, and compact structure is applicable to the flue gas cooling clean system that integrates the radioactive waste incineration device of compactification very much.
The structural design of tangential air inlet can realize the preliminary separation and the collection of particulate matter in the flue gas in flue gas cooling, has prevented the jam of flue, through compact structural design for equipment volume minimizing has realized the high-efficient cooling and the preliminary purification of radioactive flue gas, has reduced the probability that needs overhaul to maintain by a wide margin, has improved the reliability.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. The utility model provides a radioactive flue gas cooling device is prevented blockking up to compact, includes interior casing, installs the ash bucket in interior casing bottom, sets up including the casing top and with the intake pipe of interior casing intercommunication, its characterized in that, interior casing includes barrel and the cone of being connected with the barrel, the bottom of cone is equipped with the reflecting screen, the reflecting screen top is equipped with the bleeder vent, has the annular gap between the inner wall of reflecting screen and cone, the inner chamber of cone pass through the bleeder vent on the reflecting screen and the inner chamber intercommunication of annular gap and ash bucket.
2. The compact anti-clogging radioactive flue gas cooling device according to claim 1, wherein a water cooling jacket is provided on the outer side of the inner housing, the water cooling jacket covers the outer sides of the cylinder and the cone, and the two ends of the water cooling jacket are respectively connected with the cooling water inlet pipe and the cooling water outlet pipe.
3. A compact anti-clogging radioactive flue gas cooling device according to claim 1 or 2, wherein said reflective screen is tapered and the skirt portion of the reflective screen is located above said ash hopper.
4. A compact anti-clogging radioactive flue gas cooling device according to claim 3, wherein the top of said barrel is connected to an exhaust pipe.
5. The compact anti-clogging radioactive flue gas cooling device according to claim 3, wherein said inner housing has a barrel and a cone integrally formed, said cone having an inverted cone shape.
6. The compact blockage-preventing radioactive flue gas cooling device according to claim 2, wherein the cooling water inlet pipe is positioned at the bottom of the water-cooling jacket, the cooling water outlet pipe is positioned at the top of the water-cooling jacket, and the flow direction of cooling water in the water-cooling jacket is perpendicular to the flow direction of high-temperature flue gas in the inner shell.
7. The compact anti-clogging radioactive flue gas cooling device according to claim 2, wherein said inlet pipe is tangentially connected to said barrel, and flue gas enters the barrel tangentially through the inlet pipe.
8. The compact anti-clogging radioactive flue gas cooling device according to claim 2, wherein said air inlet duct is rectangular in cross-section.
CN202110296458.6A 2021-03-19 2021-03-19 Compact anti-blocking radioactive flue gas cooling device Pending CN113063158A (en)

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Application Number Priority Date Filing Date Title
CN202110296458.6A CN113063158A (en) 2021-03-19 2021-03-19 Compact anti-blocking radioactive flue gas cooling device

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CN113063158A true CN113063158A (en) 2021-07-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116726637A (en) * 2022-11-01 2023-09-12 东莞市鸿馥生物科技有限公司 Baffle type tobacco tar impurity separation device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201487979U (en) * 2009-08-28 2010-05-26 江西铜业股份有限公司 Jacket circulating water cooling device for high-temperature fume duct
CN201783407U (en) * 2010-05-12 2011-04-06 贵阳铝镁设计研究院 Device for removing dust in advance
CN102240486A (en) * 2010-05-12 2011-11-16 贵阳铝镁设计研究院有限公司 Method and apparatus for prededusting
CN202902316U (en) * 2012-07-14 2013-04-24 江苏全能环保科技有限公司 Smoke water cooling dust collecting device
CN204694115U (en) * 2015-05-20 2015-10-07 南通天蓝环保能源成套设备有限公司 A kind of flue gas cooling device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201487979U (en) * 2009-08-28 2010-05-26 江西铜业股份有限公司 Jacket circulating water cooling device for high-temperature fume duct
CN201783407U (en) * 2010-05-12 2011-04-06 贵阳铝镁设计研究院 Device for removing dust in advance
CN102240486A (en) * 2010-05-12 2011-11-16 贵阳铝镁设计研究院有限公司 Method and apparatus for prededusting
CN202902316U (en) * 2012-07-14 2013-04-24 江苏全能环保科技有限公司 Smoke water cooling dust collecting device
CN204694115U (en) * 2015-05-20 2015-10-07 南通天蓝环保能源成套设备有限公司 A kind of flue gas cooling device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116726637A (en) * 2022-11-01 2023-09-12 东莞市鸿馥生物科技有限公司 Baffle type tobacco tar impurity separation device
CN116726637B (en) * 2022-11-01 2024-01-26 东莞市鸿馥生物科技有限公司 Baffle type tobacco tar impurity separation device

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