CN111760447B - Desulfurization reaction tower and dry desulfurization process - Google Patents
Desulfurization reaction tower and dry desulfurization process Download PDFInfo
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- CN111760447B CN111760447B CN202010624735.7A CN202010624735A CN111760447B CN 111760447 B CN111760447 B CN 111760447B CN 202010624735 A CN202010624735 A CN 202010624735A CN 111760447 B CN111760447 B CN 111760447B
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 61
- 230000023556 desulfurization Effects 0.000 title claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000003546 flue gas Substances 0.000 claims abstract description 61
- 238000004544 sputter deposition Methods 0.000 claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000006185 dispersion Substances 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 claims description 66
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 52
- 239000000843 powder Substances 0.000 claims description 48
- 238000007664 blowing Methods 0.000 claims description 27
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 26
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 20
- 238000004140 cleaning Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 238000011282 treatment Methods 0.000 claims description 5
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims description 3
- 230000003009 desulfurizing effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 13
- 229910052717 sulfur Inorganic materials 0.000 description 12
- 239000011593 sulfur Substances 0.000 description 12
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011328 necessary treatment Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- 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
- B01D53/52—Hydrogen sulfide
-
- 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)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a desulfurization reaction tower and a dry desulfurization process, which has the technical scheme that: including the frame, still include: the assembled tower body is fixed on the frame and comprises a base, a lower tower section, a middle tower section and an upper tower section; a boiler flue gas supply assembly for supplying boiler flue gas from outside a lower tower section in the tower body to inside the lower tower section; a negative pressure drainage assembly for generating negative pressure to promote upward strings of boiler flue gas; a sputtering ring pipe for reacting the treating agent is embedded and fixed in the middle tower section, and the inner wall surface of the sputtering ring pipe is provided with densely distributed sputtering holes; the power assembly is used for transmitting and inputting particles sprayed by an external pulverizer into the sputtering ring pipe; a dispersion assembly disposed within the sputtering collar for accelerating dispersion of the reactive treating agent; the desulfurization reaction tower has the advantages of good desulfurization effect, smaller volume, less waste generation, short desulfurization process flow and suitability for popularization and utilization.
Description
Technical Field
The invention relates to the field of boiler flue gas desulfurization treatment, in particular to a desulfurization reaction tower and a dry desulfurization process.
Background
At present, most of the domestic flue gas of the boiler lacks necessary treatment, and a few flue gas is desulfurized by a wet method, namely, hydrogen sulfide is absorbed by alkaline solution to generate hydrogen sulfide salt, and meanwhile, a proper oxidation catalyst is selected to oxidize the hydrogen sulfide salt absorbed by the solution to generate elemental sulfur, so that the desulfurization solution is regenerated, and sulfur as a byproduct is obtained.
For example, refer to the chinese patent with the existing publication number CN106000094a, which discloses a desulfurization reaction tower and a desulfurization process, wherein a regeneration reaction section, a desulfurization reaction section, a demister and a purified gas outlet are arranged in the reaction tower, the desulfurization reaction section is located above the regeneration reaction section, and the gas inlet is located in the desulfurization reaction section. The slurry pool of the desulfurization reaction section is connected with a liquid inlet of a bubble generator of the regeneration reaction section, and a gas inlet of the bubble generator is connected with a regeneration air outlet of the regeneration reaction section; the slurry pool of the regeneration reaction section conveys the desulfurization reaction solution added with the catalyst to the nozzle of the desulfurization reaction section through a pump.
The desulfurization reaction tower and the desulfurization process have the advantages of simple structure and process. However, the desulfurization reaction tower and the desulfurization process still have some disadvantages, such as: wet sulfur removal results in more water waste, is difficult to reuse, and due to the characteristics of wet sulfur removal, the volume of the equipment is very large, and a multistage tower is often required to realize treatment; moreover, the existing few dry-type sulfur removal processes have the defects of low automation level, incomplete reaction during sulfur removal, difficulty in collecting the processed dust and inconvenience in cleaning the tower body.
Disclosure of Invention
In view of the problems mentioned in the background art, an object of the present invention is to provide a desulfurization reaction tower and a dry desulfurization process, so as to solve the problems mentioned in the background art.
The technical aim of the invention is realized by the following technical scheme:
a desulfurization reaction tower, includes the frame, still includes:
the assembled tower body is fixed on the frame and comprises a base, a lower tower section, a middle tower section and an upper tower section;
a boiler flue gas supply assembly for supplying boiler flue gas from outside a lower tower section in the tower body to inside the lower tower section;
a negative pressure drainage assembly for generating negative pressure to promote upward strings of boiler flue gas;
a sputtering ring pipe for reacting the treating agent is embedded and fixed in the middle tower section, and the inner wall surface of the sputtering ring pipe is provided with densely distributed sputtering holes;
the power assembly is used for transmitting and inputting particles sprayed by an external pulverizer into the sputtering ring pipe;
a dispersion assembly disposed within the sputtering collar for accelerating dispersion of the reactive treating agent;
a gas supply assembly for providing a high pressure gas flow to the sputtering collar;
the inner wall cleaning assembly is used for cleaning the inner wall of the tower body;
and a dust collection assembly for discharging dust from the upper tower section and collecting dust received by the base.
Preferably, the boiler flue gas feeding assembly comprises a boiler flue gas discharging pipe, a conical connecting pipe part, a minor arc spherical cover, a threaded connecting ring part, densely distributed dust gas outlets and a conical baffle ring, wherein the boiler flue gas discharging pipe is in a bent pipe shape, the boiler flue gas discharging pipe obliquely penetrates through the tower body and stretches into the tower body, the conical connecting pipe part is in threaded connection with the top end of the boiler flue gas discharging pipe, the minor arc spherical cover and the threaded connecting ring part are integrally formed, the threaded connecting ring part is in threaded connection with the top end of the conical connecting pipe part, the densely distributed dust gas outlets are respectively arranged on the annular wall of the minor arc spherical cover, and the conical baffle ring is fixed on an arc spherical surface in the minor arc spherical cover.
Preferably, the negative pressure drainage component comprises a first exhaust fan, a supporting annular plate, a vertical annular plate part, a plurality of embedded grooves and a plurality of second exhaust fans, wherein the first exhaust fan is installed and fixed in the conical connecting pipe part, the supporting annular plate is integrally formed with the vertical annular plate part, the vertical annular plate part is inserted and fixed in the lower tower section, the supporting annular plate is obliquely arranged, the embedded grooves are respectively formed in the supporting annular plate, and the second exhaust fans are respectively fixed in the embedded grooves.
Preferably, the power component comprises a first powder pump, a first pipeline, a second pipeline, a first annular pipeline and a plurality of powder discharge branch pipes, wherein the first powder pump is fixed outside the tower body, the first pipeline is communicated and fixed at the inlet end of the first powder pump, the other end of the first pipeline is connected with the spraying end of the external crusher, the second pipeline is communicated and fixed at the outlet end of the first powder pump, the second pipeline is communicated and fixed with the first annular pipeline, and the powder discharge branch pipes are respectively communicated and fixed on the first annular pipeline and extend into the sputtering annular pipe.
Preferably, the mixing and dispersing assembly comprises a supporting ring, a sliding bearing, a rotating ring, a plurality of supporting shafts, a plurality of mixing and dispersing rods, a first gear, a second gear, a speed reducer and a servo motor, wherein the supporting ring is fixed in the sputtering ring pipe, the rotating ring is rotationally connected to the upper portion of the supporting ring through the sliding bearing, the supporting shafts are respectively fixed to the upper portion of the rotating ring, the plurality of mixing and dispersing rods are respectively fixed to the supporting shafts, the first gear is fixed to the ring wall of the rotating ring, the second gear is rotationally connected to the tower body, and the second gear drives the rotating device to rotate through the servo motor and the speed reducer.
Preferably, the gas supply assembly comprises a third pipeline, a second annular pipeline and a plurality of fourth pipelines, wherein the third pipeline is fixedly communicated with the second annular pipeline, the third pipeline is used for introducing high-pressure gas flow, the second annular pipeline is fixedly arranged outside the middle tower section, the fourth pipelines are fixedly communicated with the second annular pipeline respectively, and the fourth pipelines are fixedly communicated with the sputtering ring pipe respectively.
Preferably, the inner wall cleaning assembly comprises a first annular air pipe, a first outer pipe, a plurality of first air blowing heads, a second annular air pipe, a second outer pipe and a plurality of second air blowing heads, wherein the first annular air pipe is fixed in the upper tower section through a clamp, the first outer pipe and the plurality of first air blowing heads are respectively communicated and fixed on the first annular air pipe, the second annular air pipe is fixed in the lower tower section through the clamp, the second outer pipe and the plurality of second air blowing heads are respectively communicated and fixed with the second annular air pipe, and the plurality of first air blowing heads and the plurality of second air blowing heads are respectively arranged towards the inner wall surface of the tower body.
Preferably, the dust collection assembly comprises a dust collection box, a top cover, a first hose, a second powder pump, a third hose, a fourth hose and a third powder pump, wherein the dust collection box is fixed on the frame, the top cover is clamped at the top end of the upper tower section, one end of the first hose is fixedly communicated with the top cover, the other end of the first hose is fixedly communicated with the input end of the second powder pump, the discharge end of the second powder pump is fixedly communicated with the second hose, one end of the third hose is fixedly communicated with the base, the other end of the third hose is fixedly communicated with the input end of the third powder pump, the discharge end of the third powder pump is fixedly communicated with the fourth hose, and the second hose and the fourth hose respectively extend into the dust collection box.
The invention also provides a dry desulfurization process, which specifically comprises the following steps:
s1, baking soda is used as a desulfurizing agent, the baking soda is crushed into particles with the granularity smaller than 600 meshes by utilizing a crusher, and the crushed baking soda is sprayed to the power assembly by utilizing the crusher;
s2, inputting crushed baking soda into a sputtering ring pipe by utilizing the power assembly;
s3, inputting the boiler flue gas into the tower body by utilizing the boiler flue gas feeding assembly, and accelerating the rising speed of the boiler flue gas by utilizing the negative pressure drainage assembly;
s4, blowing the baking soda particles into the tower body by using the air supply assembly while stirring the baking soda particles by using the mixing and scattering assembly;
s5, performing secondary dust removal on the upper tower section by using a denitration and dioxin removal dust remover:
s6, collecting dust by using a dust collecting assembly, starting an inner wall cleaning assembly to clean the inner wall of the tower body when more dust is accumulated on the inner wall of the tower body, and collecting the cleaned dust by using the dust collecting assembly.
In summary, the invention has the following advantages:
when the desulfurization reaction tower is used, the dry desulfurization process is adopted to remove sulfur in the boiler flue gas, compared with the traditional wet desulfurization process, the desulfurization reaction tower has the advantages that the generated waste is less, the treatment and the utilization are easier, and the volume and the construction difficulty of the device are also reduced; when the desulfurization reaction tower is used for desulfurization, the boiler flue gas can be sucked through the boiler flue gas supply assembly and the negative pressure drainage assembly and fully spread in the tower body, then the external reaction treating agent baking soda can be sent into the sputtering ring pipe by the power assembly and is scattered by the scattering assembly, the scattered baking soda is sputtered through the sputtering holes by the air supply assembly, the production control is facilitated by adopting a sputtering mode, the sulfur removal effect is improved, and the automation level is higher; the desulfurized dust can be collected by the dust collecting assembly, the inner wall of the tower body can be fully cleaned by the inner wall cleaning assembly, and the cleaned dust can be collected, so that the secondary utilization is facilitated; furthermore, the desulfurization process has the advantages of short flow and convenient control.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of the structure of the present invention;
FIG. 3 is a cross-sectional view of the present invention showing the construction of the boiler flue gas feed assembly and the negative pressure draft assembly;
fig. 4 is an enlarged view at a in fig. 3;
FIG. 5 is a schematic diagram of the present invention showing the construction of the power assembly and the blending assembly;
FIG. 6 is a cross-sectional view of the present invention showing the construction of the power assembly and the mixing and dispersing assembly;
FIG. 7 is a schematic diagram of a structure of the present invention for showing a blending assembly;
FIG. 8 is a cross-sectional view of the structure of the present invention for showing the upper tower section;
fig. 9 is a cross-sectional view showing the structure of the dust collecting assembly of the present invention.
Reference numerals: 1. a frame; 2. a tower body; 21. a base; 22. a lower tower section; 23. a middle tower section; 24. an upper tower section; 3. a boiler flue gas feed assembly; 4. a negative pressure drainage assembly; 231. sputtering a ring pipe; 232. sputtering holes; 5. a power assembly; 6. a mixing and dispersing assembly; 7. a gas supply assembly; 8. an inner wall cleaning assembly; 9. a dust collection assembly; 31. a boiler flue gas exhaust pipe; 32. a tapered nipple portion; 33. inferior arc ball cover; 34. a threaded joint ring portion; 35. a dust gas outlet; 36. a conical baffle ring; 41. a first exhaust fan; 42. a support ring plate; 43. a vertical annular plate portion; 44. embedding the groove; 45. a second exhaust fan; 51. a first powder pump; 52. a first pipe; 53. a second pipe; 54. a first annular duct; 55. a powder discharge branch pipe; 61. a support ring; 62. a sliding bearing; 63. a rotating ring; 64. a support shaft; 65. a mixing and dispersing rod; 66. a first gear; 67. a second gear; 68. a speed reducer; 69. a servo motor; 71. a third conduit; 72. a second annular duct; 73. a fourth conduit; 81. a first annular air duct; 82. a first outer tube; 83. a first blowing head; 84. a second annular air duct; 85. a second outer extension pipe; 86. a second blowing head; 91. a dust collection box; 92. a top cover; 93. a first hose; 94. a second hose; 95. a second powder pump; 96. a third hose; 97. a fourth hose; 98. and a third powder pump.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1 and 2, a desulfurization reaction tower for dry desulfurization removes sulfur-containing gas in a boiler flue by using dry desulfurization, which is more suitable for the needs of industrial production than conventional wet desulfurization.
Referring to fig. 1 and 2, the main body of the desulfurization reaction tower comprises a frame 1 and an assembled tower body 2 fixed on the frame 1, wherein the tower body 2 comprises a base 21, a lower tower section 22, a middle tower section 23 and an upper tower section 24, and the tower body 2 is in an assembled and disassembled form of the base 21, the lower tower section 22, the middle tower section 23 and the upper tower section 24, so that the desulfurization reaction tower is convenient to manufacture, replace and maintain.
Referring to fig. 1 and 2, in order to achieve dry desulfurization, the present desulfurization reaction tower is provided with the following components: such as: a boiler flue gas feeding assembly 3 for feeding boiler flue gas from the outside of the lower tower section 22 in the tower body 2 to the inside of the lower tower section 22; a negative pressure drainage assembly 4 for generating negative pressure to promote the upper strings of boiler flue gas; a sputtering ring pipe 231 which is embedded and fixed in the middle tower section 23 and is used for reacting the treating agent, wherein the inner wall surface of the sputtering ring pipe 231 is provided with densely distributed sputtering holes 232; a power assembly 5 for transmitting particles ejected from an external pulverizer into the sputtering collar 231; a dispersion member 6 disposed in the sputtering collar 231 for accelerating dispersion of the reaction treating agent; a gas supply assembly 7 for supplying a high pressure gas flow to the sputtering collar 231; an inner wall cleaning assembly 8 for cleaning the inner wall of the tower body 2; and a dust collection assembly 9 for discharging the upper tower section 24 from the dust and for receiving the base 21 for dust collection.
Referring to fig. 1 and 2, when the desulfurization reaction tower is used, the dry desulfurization process is adopted to remove sulfur from boiler flue gas, compared with the traditional wet desulfurization process, the desulfurization reaction tower has the advantages that the generated waste is less, the treatment and the utilization are easier, and the volume and the construction difficulty of the device are also reduced; when the desulfurization reaction tower is used for desulfurization, boiler flue gas can be sucked through the boiler flue gas supply assembly 3 and the negative pressure drainage assembly 4 and fully spread in the tower body 2, then external reaction treating agent sodium bicarbonate can be sent into the sputtering ring pipe 231 by the power assembly 5 and is scattered by the scattering assembly 6, the scattered sodium bicarbonate is scattered by the air supply assembly 7 through the sputtering holes 232, and the production control is facilitated by adopting a sputtering mode, the sulfur removal effect is improved, and the automation level is higher; the desulfurized dust can be collected by the dust collecting assembly 9, the inner wall of the tower body 2 can be fully cleaned by the inner wall cleaning assembly 8, and the cleaned dust can be collected, so that the secondary utilization is facilitated; furthermore, the desulfurization process has the advantages of short flow and convenient control.
Referring to fig. 3 and 4, wherein the boiler flue gas feed assembly 3 comprises a boiler flue gas exhaust pipe 31, a cone-shaped nipple portion 32, a minor arc bulb 33, a threaded collar portion 34, a dense dust gas outlet 35 and a cone-shaped baffle ring 36; wherein the boiler flue gas exhaust pipe 31 is bent pipe-shaped, the boiler flue gas exhaust pipe 31 obliquely passes through the tower body 2 and extends into the tower body 2, and when the boiler flue gas exhaust pipe 31 is bent pipe-shaped, the inflow of flue gas can be accelerated; the conical connecting pipe part 32 is in threaded connection with the top end of the boiler flue gas discharge pipe 31, and the existence of the conical connecting pipe part 32 can generate a vortex suction effect to improve the upward flow speed of the air flow; the inferior arc ball cover 33 and the threaded connection ring part 34 are integrally formed, the threaded connection ring part 34 is in threaded connection with the top end of the conical connection pipe part 32, and the threaded connection ring part 34 can be used for conveniently connecting and fixing the inferior arc ball cover 33 and the conical connection pipe part 32; in order to realize uniform diffusion of flue gas, densely distributed dust gas outlets 35 are respectively formed on the annular wall of the inferior arc spherical cover 33; in order to prevent falling objects from above from entering into the inferior arc spherical cover 33, the conical baffle ring 36 is fixed on the arc spherical surface in the inferior arc spherical cover 33, so that the boiler flue gas supply assembly 3 can accelerate the supply of flue gas and prevent the backflow of flue gas.
Referring to fig. 3 and 4, in order to realize negative pressure suction of flue gas upward, the negative pressure drainage assembly 4 comprises a first exhaust fan 41, a supporting ring plate 42, a vertical ring plate part 43, six embedded grooves 44 and six second exhaust fans 45, wherein the first exhaust fan 41 is installed and fixed in the conical connecting pipe part 32, the supporting ring plate 42 and the vertical ring plate part 43 are integrally formed, the vertical ring plate part 43 is inserted and fixed in the lower tower section 22, the supporting ring plate 42 is obliquely arranged, the six embedded grooves 44 are respectively formed in the supporting ring plate 42, and the six second exhaust fans 45 are respectively fixed in the embedded grooves 44; when the first exhaust fan 41 in the conical connecting pipe part 32 is started, negative pressure can be generated in the conical connecting pipe part 32, flue gas is caused to flow upwards from the boiler flue gas discharge pipe 31, the supporting annular plate 42 has two functions, on one hand, the second exhaust fan 45 can be supported and fixed so as to generate negative pressure above the inferior arc spherical cover 33, the flue gas is sucked up and down, and on the other hand, the second annular air pipe 84 and the second air blowing head 86 in the inner wall of the tower body 2 can be protected from dust when the inner wall is cleaned.
Referring to fig. 5 and 6, the power assembly 5 includes a first powder pump 51, a first pipe 52, a second pipe 53, a first annular pipe 54 and four powder discharge branch pipes 55, wherein the first powder pump 51 is fixed outside the tower body 2, the first pipe 52 is fixedly connected to an inlet end of the first powder pump 51, the other end of the first pipe 52 is connected to an outlet end of an external pulverizer, the second pipe 53 is fixedly connected to an outlet end of the first powder pump 51, the second pipe 53 is fixedly connected to the first annular pipe 54, and a plurality of powder discharge branch pipes 55 are fixedly connected to the first annular pipe 54 and extend into the sputtering ring pipe 231; when the outside pulverizer pulverizes baking soda into powder to be sprayed out, the first powder pump 51 may be started, and the baking soda is fed to the sputtering collar 231 through the first pipe 52, the second pipe 53, the first ring pipe 54 and the powder discharge branch pipe 55 by the first powder pump 51 to facilitate sputtering.
Referring to fig. 6 and 7, the mixing and dispersing assembly 6 includes a support ring 61, a sliding bearing 62, a rotating ring 63, four support shafts 64, twelve mixing and dispersing rods 65, a first gear 66, a second gear 67, a decelerator 68 and a servo motor 69, wherein the support ring 61 is fixed in a sputtering collar 231, the rotating ring 63 is rotatably connected above the support ring 61 through the sliding bearing 62, the four support shafts 64 are respectively fixed above the rotating ring 63, the twelve mixing and dispersing rods 65 are respectively fixed on the support shafts 64, the first gear 66 is fixed on the annular wall of the rotating ring 63, the second gear 67 is rotatably connected to the tower body 2, and the second gear 67 is rotated through the servo motor 69 and the decelerator 68; when the servo motor 69 is started, the first gear 66 is driven to rotate, the second gear 67 is driven to rotate, the supporting shaft 64 and the mixing and dispersing rod 65 are driven to rotate, and baking soda powder in the sputtering ring pipe 231 is stirred and rolled so as to facilitate blowing out of the high-pressure drum.
Referring to fig. 5 and 6, the air supply assembly 7 includes a third pipe 71, a second annular pipe 72 and twelve fourth pipes 73, wherein the third pipe 71 is fixedly connected with the second annular pipe 72, the third pipe 71 is used for introducing high-pressure air flow, the second annular pipe 72 is fixedly arranged outside the middle tower section 23, a plurality of fourth pipes 73 are fixedly connected with the second annular pipe 72, twelve fourth pipes 73 are fixedly connected with the sputtering ring pipe 231, the third pipe 71 is externally connected with a high-pressure air source when sputtering is performed, and the high-pressure air blows out baking soda powder in the sputtering ring pipe 231 into the tower body 2 through the third pipe 71, the second annular pipe 72 and the twelve fourth pipes 73 so as to ensure that sufficient sulfur removal can be performed.
Referring to fig. 4 and 8, in order to facilitate cleaning of the inner wall of the tower body 2, the inner wall cleaning assembly 8 includes a first annular air duct 81, a first outer pipe 82, twelve first air blowing heads 83, a second annular air duct 84, a second outer pipe 85, and twelve second air blowing heads 86, wherein the first annular air duct 81 is fixed in the upper tower section 24 by a clip, the first outer pipe 82 and the twelve first air blowing heads 83 are respectively fixed on the first annular air duct 81 in a communicating manner, the second annular air duct 84 is fixed in the lower tower section 22 by a clip, the second outer pipe 85 and the twelve second air blowing heads 86 are respectively fixed in a communicating manner with the second annular air duct 84, the twelve first air blowing heads 83 and the twelve second air blowing heads 86 are respectively arranged toward the inner wall surface of the tower body 2, and the inclination angle is 60 °, when the high pressure air source is supplied through the first outer pipe 82 and the second outer pipe 85, dust can be blown out from the inner wall of the tower body 2 by the first air blowing heads 83 and the second air blowing heads 86, and the function of cleaning the inner wall of the tower body 2 is achieved.
Referring to fig. 2 and 9, the dust collection assembly 9 includes a dust box 91, a top cover 92, a first hose 93, a second hose 94, a second powder pump 95, a third hose 96, a fourth hose 97 and a third powder pump 98, the dust box 91 is fixed on the frame 1, the top cover 92 is clamped at the top end of the upper tower section 24, one end of the first hose 93 is fixedly connected with the top cover 92, the other end of the first hose 93 is fixedly connected with the input end of the second powder pump 95, the discharge end of the second powder pump 95 is fixedly connected with the second hose 94, one end of the third hose 96 is fixedly connected with the base 21, the other end of the third hose 96 is fixedly connected with the input end of the third powder pump 98, the discharge end of the third powder pump 98 is fixedly connected with the fourth hose 97, and the second hose 94 and the fourth hose 97 respectively extend into the dust box 91; when the sulfur removal reaction time is controlled, the second powder pump 95 can be started to pump the treated flue gas and dust to the collection box through the first hose 93 and the second hose 94, and when the tower body 2 is cleaned, the third powder pump 98 can be started to collect the cleaned dust to the dust collection box 91 through the third hose 96 and the fourth hose 97.
Example 2
The difference from example 1 is that a dry desulfurization process is also provided, which specifically comprises the following steps:
the invention also provides a dry desulfurization process, which specifically comprises the following steps:
s1, baking soda is used as a desulfurizing agent, the baking soda is crushed into particles with the granularity of 600 meshes by a crusher, and the crushed baking soda is sprayed to the power assembly 5 by the crusher;
s2, inputting crushed baking soda into a sputtering ring pipe 231 by utilizing the power assembly 5;
s3, inputting the boiler flue gas into the tower body 2 by using the boiler flue gas feeding assembly 3, and accelerating the rising speed of the boiler flue gas by using the negative pressure drainage assembly 4;
s4, blowing the baking soda particles into the tower body 2 by using the air supply assembly 7 while stirring the baking soda particles by using the mixing and scattering assembly 6;
s5, performing secondary dust removal by using a denitration and dioxin removal dust remover at the upper tower section 24:
s6, collecting dust by using the dust collecting assembly 9, starting the inner wall cleaning assembly 8 to clean the inner wall of the tower body 2 when more dust is accumulated on the inner wall of the tower body 2, and collecting the cleaned dust by using the dust collecting assembly 9.
Example 3
The difference from example 1 is that:
an insulating layer and an outer shell layer are arranged on the outer wall of the tower body 2 in the device, the insulating layer is die-casting asbestos, and the outer shell layer is a stainless steel layer; the base 21, the lower tower section 22, the middle tower section 23 and the upper tower section 24 are buckled layer by layer and fixed through bolts so as to be convenient to disassemble;
in addition, referring to fig. 9, in the present apparatus, an air pressure balancing component is disposed on the dust box 91, and includes a protruding pipe, a filter cover, a threaded snap ring, a cotton yarn layer and a melt-blown cloth layer, wherein the protruding pipe is fixed on the dust box 91 through a flange connection, the filter cover is screwed on the top of the protruding pipe, the threaded snap ring is screwed in the protruding pipe, and the cotton yarn layer and the melt-blown cloth layer are respectively fixed in the threaded snap ring, so that the arrangement can prevent the processed dust from scattering outwards and maintain the air pressure balance in the dust box 91;
in addition, valves and pressure gauges are respectively arranged on the third pipeline 71, the first outer pipe 82, the second outer pipe 85 and the boiler flue gas discharge pipe 31 in the device, and connecting flanges are fixed at the ends of the third pipeline 71, the first outer pipe 82, the second outer pipe 85 and the boiler flue gas discharge pipe 31 for convenient connection.
In addition, the device is also provided with a temperature controller and a pressure detector inside the tower body 2, and the temperature controller can be used for controlling the temperature inside the tower body 2 so as to promote the reaction; the pressure detector can be used for measuring and controlling the pressure in the tower body 2 in real time, so that the safety is improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a desulfurization reaction tower, includes frame (1), its characterized in that: further comprises:
an assembled tower body (2) fixed on the frame (1), wherein the tower body (2) comprises a base (21), a lower tower section (22), a middle tower section (23) and an upper tower section (24);
a boiler flue gas supply assembly (3) for supplying boiler flue gas from outside a lower tower section (22) in the tower body (2) to inside the lower tower section (22);
a negative pressure drainage assembly (4) for generating negative pressure to promote the upward stringing of boiler flue gas;
a sputtering ring pipe (231) which is embedded and fixed in the middle tower section (23) and is used for reacting the treating agent, and the inner wall surface of the sputtering ring pipe (231) is provided with densely distributed sputtering holes (232);
a power assembly (5) for transmitting particles ejected by an external pulverizer into the sputtering collar (231);
a dispersion assembly (6) disposed within the sputtering collar (231) for accelerating dispersion of the reactive treatment agent;
-a gas supply assembly (7) for providing a high pressure gas flow to the sputter collar (231);
an inner wall cleaning assembly (8) for cleaning the inner wall of the tower body (2);
and a dust collection assembly (9) for discharging dust from the upper tower section (24) and for receiving dust collection from the base (21);
the mixing and dispersing assembly (6) comprises a supporting ring (61), a sliding bearing (62), a rotating ring (63), a plurality of supporting shafts (64), a plurality of mixing and dispersing rods (65), a first gear (66), a second gear (67), a speed reducer (68) and a servo motor (69), wherein the supporting ring (61) is fixed in the sputtering ring pipe (231), the rotating ring (63) is rotationally connected above the supporting ring (61) through the sliding bearing (62), the plurality of supporting shafts (64) are respectively fixed above the rotating ring (63), the plurality of mixing and dispersing rods (65) are respectively fixed on the supporting shafts (64), the first gear (66) is fixed on the annular wall of the rotating ring (63), the second gear (67) is rotationally connected on the tower body (2), and the second gear (67) is rotationally driven by the servo motor (69) and the speed reducer (68);
the air supply assembly (7) comprises a third pipeline (71), a second annular pipeline (72) and a plurality of fourth pipelines (73), wherein the third pipeline (71) is fixedly communicated with the second annular pipeline (72), the third pipeline (71) is used for introducing high-pressure air flow, the second annular pipeline (72) is fixedly arranged outside the middle tower section (23), the fourth pipelines (73) are fixedly communicated with the second annular pipeline (72) respectively, and the fourth pipelines (73) are fixedly communicated with the sputtering ring pipe (231) respectively.
2. The desulfurization reaction tower according to claim 1, characterized in that: the boiler flue gas feeding assembly (3) comprises a boiler flue gas discharging pipe (31), a conical connecting pipe portion (32), a minor arc spherical cover (33), a threaded connecting ring portion (34), a dense dust gas outlet (35) and a conical baffle ring (36), wherein the boiler flue gas discharging pipe (31) is in a bent pipe shape, the boiler flue gas discharging pipe (31) obliquely penetrates through the tower body (2) and stretches into the tower body (2), the tapered connecting pipe portion (32) is in threaded connection with the top end of the boiler flue gas discharging pipe (31), the minor arc spherical cover (33) and the threaded connecting ring portion (34) are integrally formed, the threaded connecting ring portion (34) is in threaded connection with the top end of the conical connecting pipe portion (32), the dense dust gas outlet (35) is respectively opened on the annular wall of the minor arc spherical cover (33), and the conical baffle ring (36) is fixed on an arc spherical surface in the minor arc spherical cover (33).
3. A desulfurization reaction tower according to claim 2, characterized in that: negative pressure drainage subassembly (4) are including first air exhauster (41), support ring plate (42), vertical ring plate portion (43), a plurality of embedded groove (44) and a plurality of second air exhauster (45), first air exhauster (41) are installed and are fixed in toper takeover portion (32), support ring plate (42) with integrated into one piece between vertical ring plate portion (43), vertical ring plate portion (43) are pegged graft and are fixed in lower tower section (22), support ring plate (42) slope sets up, a plurality of embedded groove (44) are seted up respectively in support ring plate (42), a plurality of second air exhauster (45) are fixed respectively in embedded groove (44).
4. The desulfurization reaction tower according to claim 1, characterized in that: the power component (5) comprises a first powder pump (51), a first pipeline (52), a second pipeline (53), a first annular pipeline (54) and a plurality of powder discharge branch pipes (55), wherein the first powder pump (51) is fixed outside the tower body (2), the first pipeline (52) is communicated and fixed at the inlet end of the first powder pump (51), the other end of the first pipeline (52) is connected with the outlet end of an external pulverizer, the second pipeline (53) is communicated and fixed at the outlet end of the first powder pump (51), the second pipeline (53) is communicated and fixed with the first annular pipeline (54), and the powder discharge branch pipes (55) are respectively communicated and fixed on the first annular pipeline (54) and extend into the sputtering ring pipe (231).
5. The desulfurization reaction tower according to claim 1, characterized in that: the inner wall cleaning assembly (8) comprises a first annular air pipe (81), a first outer extending pipe (82), a plurality of first air blowing heads (83), a second annular air pipe (84), a second outer extending pipe (85) and a plurality of second air blowing heads (86), wherein the first annular air pipe (81) is fixed in the upper tower section (24) through a clamp, the first outer extending pipe (82) and the plurality of first air blowing heads (83) are respectively communicated and fixed on the first annular air pipe (81), the second annular air pipe (84) is fixed in the lower tower section (22) through the clamp, the second outer extending pipe (85) and the plurality of second air blowing heads (86) are respectively communicated and fixed with the second annular air pipe (84), and the plurality of first air blowing heads (83) and the plurality of second air blowing heads (86) are respectively arranged towards the inner wall surface of the tower body (2).
6. The desulfurization reaction tower according to claim 1, characterized in that: the dust collection assembly (9) comprises a dust collection box (91), a top cover (92), a first hose (93), a second hose (94), a second powder pump (95), a third hose (96), a fourth hose (97) and a third powder pump (98), wherein the dust collection box (91) is fixed on the frame (1), the top cover (92) is clamped at the top end of the upper tower section (24), one end of the first hose (93) is fixedly communicated with the top cover (92), the other end of the first hose (93) is fixedly communicated with the input end of the second powder pump (95), the discharge end of the second powder pump (95) is fixedly communicated with the second hose (94), one end of the third hose (96) is fixedly communicated with the base (21), the other end of the third hose (96) is fixedly communicated with the input end of the third powder pump (98), the discharge end of the third powder pump (98) is fixedly communicated with the fourth hose (97), and the fourth hose (97) are fixedly communicated with the fourth hose (91).
7. A dry desulfurization process using the desulfurization reaction tower according to any one of claims 1 to 6, characterized in that: the method specifically comprises the following steps:
s1, baking soda is used as a desulfurizing agent, the baking soda is crushed into particles with the granularity smaller than 600 meshes by utilizing a crusher, and the crushed baking soda is sprayed to the power assembly (5) by utilizing the crusher;
s2, inputting crushed baking soda into a sputtering ring pipe (231) by utilizing the power assembly (5);
s3, inputting the boiler flue gas into the tower body (2) by using the boiler flue gas feeding assembly (3), and accelerating the rising speed of the boiler flue gas by using the negative pressure drainage assembly (4);
s4, blowing the baking soda particles into the tower body (2) by using the air supply assembly (7) while stirring the baking soda particles by using the mixing and scattering assembly (6);
s5, performing secondary dust removal by using a denitration and dioxin removal dust remover at an upper tower section (24):
s6, collecting dust by using a dust collecting assembly (9), and when more dust is accumulated on the inner wall of the tower body (2), starting an inner wall cleaning assembly (8) to clean the inner wall of the tower body (2), and also collecting the cleaned dust by using the dust collecting assembly (9).
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