CN115040999A - Chain grate-rotary kiln denitration system - Google Patents
Chain grate-rotary kiln denitration system Download PDFInfo
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- CN115040999A CN115040999A CN202210488503.2A CN202210488503A CN115040999A CN 115040999 A CN115040999 A CN 115040999A CN 202210488503 A CN202210488503 A CN 202210488503A CN 115040999 A CN115040999 A CN 115040999A
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- 239000007788 liquid Substances 0.000 claims abstract description 119
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000003546 flue gas Substances 0.000 claims abstract description 81
- 238000000746 purification Methods 0.000 claims abstract description 66
- 238000007790 scraping Methods 0.000 claims abstract description 53
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 abstract description 52
- 230000033001 locomotion Effects 0.000 abstract description 27
- 238000010030 laminating Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 17
- 238000004140 cleaning Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 8
- 239000000779 smoke Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000197194 Bulla Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000002352 blister Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
- B08B1/165—Scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of flue gas denitration, and particularly relates to a grate-rotary kiln denitration system which comprises a preheating unit, a roasting unit and a flue gas purification unit, wherein the flue gas purification unit comprises a purification tower, and an air outlet pipe, an air inlet pipe and a waste liquid pipe are arranged on the purification tower; the purification tower comprises a tower body, a motor and a circulation module; the center of the bottom of the tower body is fixedly connected with a motor, and one side of the tower body is provided with a circulating module; through setting up the scraping rod, the axis of rotation drives an axle motion, an axle drives the ring motion, the ring receives slider and recess laminating influence restriction ring rotation each other, the ring drives the scraping rod motion, the scraping rod drives the elastic sheet motion, the scraping rod drives the square hole inner wall of elastic sheet contact, the elastic sheet scrapes square hole inner wall, strike off adnexed impurity on the square hole inner wall, increase the clean degree of quad slit, thereby increase the motion efficiency of flue gas, and then increase the purification efficiency of flue gas.
Description
Technical Field
The invention belongs to the technical field of flue gas denitration, and particularly relates to a chain grate-rotary kiln denitration system.
Background
Denitration of flue gas, i.e. reduction of NOx produced to N 2 Thereby removing NOX in the flue gas, and can be separated according to the treatment processThe method comprises the steps of wet denitration and dry denitration. The wet flue gas denitration is to purify the coal-fired flue gas by utilizing the principle that NOX is dissolved by a liquid absorbent. The biggest obstacle is that NO is difficult to dissolve in water, often requiring that NO is first oxidized to NO 2 (ii) a For this purpose, NO is generally first passed through an oxidizing agent O 3 、ClO 2 Or KMnO 4 React and oxidize to generate NO 2 Then NO 2 Absorbed by water or alkaline solution. The method is characterized in that wet denitration is most commonly performed by utilizing a purification tower, in the working production process of a chain grate-rotary kiln, flue gas generated in the chain grate-rotary kiln cannot be directly discharged into the air, and in the prior art, the flue gas generated in the chain grate-rotary kiln is usually introduced into the purification tower through a large-caliber air pipe, and the flue gas is purified and then discharged into the air.
The prior art also discloses a technical scheme of a grate-rotary kiln denitration system, for example, a chinese patent with application number CN2020203151288 discloses an efficient dust removal absorption tower for flue gas denitration, which comprises an absorption tower main body, wherein a tower body of the absorption tower main body, which is close to the bottom end position of the absorption tower main body, is provided with a waste liquid discharge pipe communicated with the inside of the absorption tower main body, the absorption tower main body is also provided with a flue gas inlet pipe and a flue gas treatment device, the flue gas inlet pipe comprises a vent pipe arranged on the absorption tower main body, and the inner wall of a gas distribution cover is provided with a gas distribution net cover; the flue gas treatment device comprises a booster pump arranged on the absorption tower main body, and a plurality of nozzles which are annularly arranged at equal intervals and communicated with the interior of the liquid storage disc are arranged on the bottom surface of the liquid storage disc; but this technical scheme exists not enoughly, this patent waste gas is through gaseous screen panel and the gaseous slow-flow net of spreading after soaking, can prolong the contact time of waste gas and liquid medicine, the messenger is to exhaust-gas treatment's cleaner thoroughly, but when this patent application carried out denitration treatment at the waste gas that grate-rotary kiln produced, gaseous slowly passes through screen panel and slow-flow net, gaseous and liquid medicine contact takes place chemical reaction and produces impurity, the impurity of its production is detained at screen panel or slow-flow net, impurity is in screen panel and slow-flow net upper structure in long-time working process, block up screen panel and slow-flow net gradually, lead to liquid medicine flow speed to slow down or stop flowing, cause the stifled tower or drown tower phenomenon to take place, influence exhaust purification efficiency.
In view of the above, the present invention provides a grate-rotary kiln denitration system, which solves the above problems.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that when the waste gas generated by the grate-rotary kiln is subjected to denitration treatment, gas is in contact with liquid medicine to generate chemical reaction to generate impurities, the generated impurities are retained on a tower plate, and under the long-time working condition, the impurities generated by the gas-liquid reaction block air holes to cause a tower flooding phenomenon, the invention provides a grate-rotary kiln denitration system.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a chain grate-rotary kiln denitration system, which comprises a preheating unit, a roasting unit and a flue gas purification unit; the flue gas purification unit comprises a purification tower, and the purification tower comprises a tower body, a motor and a circulation module; the center of the bottom of the tower body is fixedly connected with a motor, one side of the tower body is provided with a circulating module, the top of the inside of the tower body is fixedly connected with an air outlet pipe, the position of the outer surface of the tower body, which is far away from the circulating module, is fixedly connected with an air inlet pipe, and the position of the bottom of the tower body, which is far away from the motor, is fixedly connected with a waste liquid pipe; the inner top of the tower body is fixedly connected with a demisting module, and the position in the tower body, which is close to the demisting module, is fixedly connected with a liquid outlet module; a group of tower plates are uniformly and fixedly connected in the tower body, the positions, close to the inner wall of the tower body, of the tops of the tower plates are fixedly connected with baffle plates, a group of square holes are uniformly formed in the tower plates, and the square holes are obliquely arranged; a rotating shaft is rotatably connected at the central position in the tower body, one end of the rotating shaft, which is far away from the tower body, is fixedly connected with the output end of the motor, and one end of the rotating shaft, which is far away from the motor, is close to the liquid outlet module; the rotating shaft is fixedly connected with a first plate at the top of the tower plate, a first shaft is fixedly connected with the surface of the rotating shaft opposite to the first plate, a group of grooves are uniformly formed in the first shaft, a ring is sleeved on the first shaft, a first groove is formed in the ring corresponding to the groove, a sliding block is connected in the first groove in a sliding manner, and the sliding block is connected with the first groove through a reset spring; the outer surface of the circular ring is fixedly connected with scraping rods uniformly, the scraping rods correspond to the positions of the square holes, two sides of each scraping rod, far away from the first shaft, are fixedly connected with a group of elastic pieces, and the elastic pieces are arranged in a relatively bent mode; and annular plates are fixedly connected below the tower plates in the tower body and are obliquely arranged.
When the device is used, in the prior art, when the drying grate-rotary kiln desulfurization and denitrification treatment is carried out, a preheating unit, a roasting unit and a flue gas purification unit are needed, wherein the preheating unit preheats and partially oxidizes material balls through the drying grate, the roasting unit roasts the material balls at high temperature through soaking and rolling of the rotary kiln, and the flue gas purification unit purifies harmful flue gas exhausted from the drying grate and the rotary kiln through a purification tower and then exhausts the harmful flue gas; when the flue gas in the chain grate-rotary kiln is purified, the purification tower is opened, the liquid is conveyed to the liquid outlet module by the circulating module through the water pipe, the liquid flows out of the liquid outlet module and flows to the bottom of the tower body, the liquid contacts the surface of the tower plate in the flowing process, the liquid is partially accumulated on the tower plate under the limiting action of the baffle, the liquid overflows from the top of the baffle and drops in a square hole, the flue gas is discharged to the bottom of the purification tower through the air inlet pipe, the flue gas moves towards the direction of the air outlet pipe in the tower body, and the motor drives the rotating shaft to move. The normal work of the purification tower is influenced; the rotating shaft drives the first plate to move, the first plate stirs liquid on the surface of the tower plate within the range of the baffle plate, the liquid movement is accelerated, and the uniformity degree of the liquid is increased, so that the purification efficiency of the flue gas is increased, the phenomenon that the liquid close to the surface of the tower plate contacts the flue gas firstly to react is avoided, the reaction degree of the liquid far away from the surface of the tower plate and the flue gas is weaker than that of the liquid close to the surface of the tower plate and the flue gas, the concentration of the upper layer and the lower layer of the liquid on the surface of the tower plate within the range of the baffle plate is different, and when the flue gas bubbles in the liquid, the time of the flue gas and the liquid capable of reacting is shortened, so that the purification efficiency of the flue gas is reduced; the rotating shaft drives the first shaft to move, the first shaft drives the circular ring to move, the circular ring is limited to rotate under the mutual attaching influence of the sliding block and the groove, the circular ring drives the scraping rod to move, the scraping rod drives the elastic piece to move, the elastic piece is made of corrosion-resistant metal materials, the square hole in the tower plate is obliquely arranged, the part, far away from the circular ring, of the scraping rod is located in the square hole, the scraping rod drives the elastic piece to contact the inner wall of the square hole, the elastic piece scrapes the inner wall of the square hole to scrape impurities attached to the inner wall of the square hole, and the cleaning degree of the square hole is increased, so that the moving efficiency of smoke is increased, the purification efficiency of the smoke is further increased, the scaling phenomenon generated in the hole after long-time work is prevented, the square hole is blocked, gas cannot bubble out through the square hole, the phenomenon that the purification tower is submerged is caused, and the normal work of the purification tower is influenced; because the square hole is arranged, impurities after gas-liquid reaction flow down along with liquid from the square hole, part of the impurities are attached to part of the inner wall of the square hole, and the part without the impurities in the square hole continuously passes through the flue gas, so that the gas movement efficiency is increased, the purification efficiency is increased, and the influence of the impurities on the flue gas passing through the sieve holes in the tower plate after the impurities are attached to the sieve holes in the tower plate in the prior art is avoided; the scraping rod moves along the inner wall of the square hole to drive the circular ring to move towards the direction away from the rotating shaft, the inner surface of the circular ring scrapes the surface of the first shaft, impurities on the surface of the first shaft are scraped, the cleaning degree of the first shaft is increased, the cleaning degree of liquid is increased, and the phenomenon that the first shaft is stained with excessive impurities to cause secondary pollution of the first shaft impurities is prevented; when the scraping rod moves along the inner wall of the square hole, the sliding block is influenced by the acting force of a reset spring and is stabilized in the groove, the circular ring rotates on the first shaft, the circular ring drives the scraping rod to enter the next square hole, and the scraping rod drives the elastic sheet to scrape the inner wall of the next square hole; according to the invention, the overflow weir is arranged between the baffle and the inner wall of the tower body, liquid flows to the annular plate and then flows to the surface of a lower tower plate along the inclined surface of the annular plate until the liquid flows to the bottom of the tower body, the liquid at the bottom of the tower body flows into the circulating module through the waste liquid pipe, the circulating module purifies the liquid for reuse, and the purified liquid enters the liquid outlet module again through the water pipe; the gas flows to the demisting module through the tower plate, and the demisting module purifies the gas again and then discharges the gas.
Preferably, the square hole is arranged in a conical shape.
During the use, be the toper through setting up the quad slit, and the quad slit is close to the one end aperture at tower body top and is greater than the one end aperture that the tower body top was kept away from to the quad slit, the axis of rotation position rotation is kept away from to the ring on an axle in the quad slit, the ring drives scrapes the pole and gets into next quad slit, when scraping the pole and driving the elastic sheet and contact next quad slit for the first time, the one end aperture grow that next quad slit is close to the tower body top, it drives the elastic sheet and gets into the quad slit to scrape the pole, increase the motion efficiency of scraping the pole, thereby increase the efficiency of cleaing away of impurity in the quad slit, and then increase the purification efficiency of flue gas, when preventing to scrape the pole and drive the elastic sheet and get into next quad slit, the pole is scraped to one side inner wall that the quad slit kept away from the ring, thereby will scrape the pole card on the quad slit inner wall, lead to the ring motion to stop, influence the normal work of purifying column.
Preferably, one end of the first plate, which is close to the baffle, is fixedly connected with a scraper.
During the use, through setting up the scraper blade, the axis of rotation drives a board motion, a board drives the scraper blade motion, the scraper blade is scraped the baffle and is close to axis of rotation side surface, strike off the impurity on the baffle table, increase the clean degree of baffle, thereby increase the motion effect of a axle, and then increase the purification efficiency of flue gas, it is too much to prevent that the baffle from being close to the surface pile up impurity on axis of rotation one side, after the long-time work of purifying column, the baffle is close to the surface scale deposit on axis of rotation one side, influence a axle normal motion, thereby influence purifying column purification efficiency.
Preferably, the scraper is arranged in a circular arc shape.
When the device is used, the scraper is arranged to be arc-shaped, the rotating shaft drives the first plate to move, the first plate drives the scraper to move, the arc-shaped surface of the scraper scrapes the surface of the baffle close to one side of the rotating shaft, under the condition of the same acting force, the contact area between objects is reduced, the pressure between the objects is increased, impurities on the surface of the baffle close to one side of the rotating shaft are more easily scraped by the scraper, the cleaning degree of the surface of the baffle is increased, the moving effect of the first shaft is increased, and the purification efficiency of smoke is increased; after the scraping plate scrapes off the impurities, the impurities move towards the direction far away from the baffle under the guiding action of the arc-shaped surface of the scraping plate.
Preferably, a first hole is formed in the center of the first plate.
During the use, through setting up a hole, the axis of rotation drives a board motion, a board contact scrapes partial liquid, thereby liquid passes from a hole on a board and crosses, increase the even degree of liquid on the column plate, thereby increase the even degree of flue gas contact liquid postreaction, prevent a board scraping liquid after, liquid receives a board promotion influence along with a board motion, make the liquid level height difference of the liquid of a board both sides, it is inhomogeneous to lead to the liquid distribution on the column plate, the flue gas is from the position tympanic bulla of a board one side liquid level height low and when going out, the contact time of flue gas and liquid reduces, reduce the reaction degree of flue gas and liquid, cause flue gas purification efficiency to reduce.
Preferably, a second plate is fixedly connected between the tower plate and the annular plate in the tower body.
When the device is used, the second plate is arranged, the surface of the second plate is subjected to smooth treatment, the top of the second plate is attached to the bottom of the tower plate, the bottom of the second plate is attached to the inclined surface of the annular plate, the rotating shaft drives the second plate to move, the second plate scrapes the bottom of the tower plate and the surface of the second plate, the second plate contacts impurities on the bottom of the tower plate and the surface of the second plate, and the movement efficiency of the impurities falling to the bottom of the tower body is accelerated, so that the cleaning efficiency of the tower plate and the second plate is increased, the liquid movement efficiency is increased, and the flue gas purification efficiency is increased; after the column plate bottom contacted the flue gas, some impurity in the flue gas contacted column plate bottom and adhered to, No. two boards scraped column plate bottom, scraped the impurity of column plate bottom, prevented scale deposit under the long-time condition of column plate bottom impurity to influence the normal work of purifying column.
The invention has the following beneficial effects:
1. according to the chain grate-rotary kiln denitration system, the scraping rods are arranged, the rotating shaft drives the first shaft to move, the first shaft drives the circular ring to move, the circular ring is limited to rotate due to the fact that the sliding blocks and the grooves are mutually attached, the circular ring drives the scraping rods to move, the scraping rods drive the elastic pieces to contact the inner wall of the square hole, the elastic pieces scrape the inner wall of the square hole, impurities attached to the inner wall of the square hole are scraped, the cleaning degree of the square hole is increased, accordingly, the moving efficiency of smoke is increased, and further, the purification efficiency of the smoke is increased.
2. According to the chain grate-rotary kiln denitration system, the square hole is conical, the circular ring is positioned on the first shaft and rotates far away from the rotating shaft of the square hole, the circular ring drives the scraping rod to enter the next square hole, when the scraping rod drives the elastic sheet to contact the next square hole for the first time, the aperture of one end, close to the top of the tower body, of the next square hole is increased, the scraping rod drives the elastic sheet to enter the square hole, the movement efficiency of the scraping rod is increased, the removal efficiency of impurities in the square hole is increased, and the purification efficiency of flue gas is increased.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of a purification tower according to the present invention;
FIG. 2 is a schematic view of a purification column according to the present invention;
FIG. 3 is a schematic view showing another structure of a purification column in the present invention;
FIG. 4 is a perspective view of a tray according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 2 at A;
FIG. 6 is an enlarged view of a portion of FIG. 3 at B;
FIG. 7 is an enlarged view of a portion of FIG. 4 at C;
in the figure: the tower body 1, the motor 11, the circulation module 12, the defogging module 13, the liquid outlet module 14, the rotating shaft 15, the tower plate 2, the baffle 21, the square hole 22, the first plate 23, the scraping plate 24, the first hole 25, the first shaft 3, the groove 31, the circular ring 4, the first groove 41, the sliding block 42, the scraping rod 43, the elastic sheet 44, the annular plate 45 and the second plate 46.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 7, the grate-rotary kiln denitration system of the present invention comprises a preheating unit, a roasting unit and a flue gas purification unit, wherein the flue gas purification unit comprises a purification tower, and the purification tower is provided with an air outlet pipe, an air inlet pipe and a waste liquid pipe; the purification tower comprises a tower body 1, a motor 11 and a circulating module 12; the center of the bottom of the tower body 1 is fixedly connected with a motor 11, and one side of the tower body 1 is provided with a circulating module 12; the top in the tower body 1 is fixedly connected with a demisting module 13, and a liquid outlet module 14 is fixedly connected to the position, close to the demisting module 13, in the tower body 1; a group of tower plates 2 are uniformly and fixedly connected in the tower body 1, the positions, close to the inner wall of the tower body 1, of the tops of the tower plates 2 are fixedly connected with baffle plates 21, a group of square holes 22 are uniformly formed in the tower plates 2, and the square holes 22 are obliquely arranged; a rotating shaft 15 is rotatably connected to the center position in the tower body 1, one end, far away from the tower body 1, of the rotating shaft 15 is fixedly connected with the output end of the motor 11, and one end, far away from the motor 11, of the rotating shaft 15 is close to the liquid outlet module 14; the rotating shaft 15 is fixedly connected with a first plate 23 at the top of the tower plate 2, a first shaft 3 is fixedly connected with the surface of the rotating shaft 15 opposite to the first plate 23, a group of grooves 31 are uniformly formed in the first shaft 3, a circular ring 4 is sleeved on the first shaft 3, a first groove 41 is formed in the circular ring 4 at the position corresponding to the groove 31, a sliding block 42 is slidably connected in the first groove 41, and the sliding block 42 is connected with the first groove 41 through a reset spring; the outer surface of the circular ring 4 is uniformly fixedly connected with scraping rods 43, the scraping rods 43 correspond to the square holes 22, two sides of each scraping rod 43 far away from the first shaft 3 are fixedly connected with a group of elastic pieces 44, and the elastic pieces 44 are oppositely and flexibly arranged; the tower body 1 is internally provided with annular plates 45 which are fixedly connected below the tower plates 2, and the annular plates 45 are obliquely arranged.
When the device is used, in the prior art, when the grate-rotary kiln is subjected to desulfurization and denitrification treatment, a preheating unit, a roasting unit and a flue gas purification unit are needed, wherein the preheating unit is used for preheating and partially oxidizing pellets through the grate, the roasting unit is used for roasting the pellets at high temperature through soaking and rolling of the rotary kiln, and the flue gas purification unit is used for purifying harmful flue gas exhausted from the grate and the rotary kiln through a purification tower and then exhausting the harmful flue gas; when the flue gas in the chain grate-rotary kiln is purified, the purification tower is opened, the circulating module 12 conveys the liquid to the liquid outlet module 14 through a water pipe, the liquid flows out of the liquid outlet module 14 and flows to the bottom of the tower body 1, the liquid contacts the surface of the tower plate 2 in the flowing process, the liquid is partially accumulated on the tower plate 2 under the limiting action of the baffle 21, the liquid overflows from the top of the baffle 21 and drips in the square hole 22, the flue gas is discharged to the bottom of the purification tower through the air inlet pipe, the flue gas moves towards the direction of the air outlet pipe in the tower body 1, the motor 11 drives the rotating shaft 15 to move, the motor 11 is a conventional speed reducing motor 11 in the field, the rotating shaft 15 drives the first plate 23, one end of the first plate 23, close to the tower plate 2, scrapes the surface of the tower plate 2, and scrapes impurities generated after the reaction of the flue gas and the liquid on the surface of the tower plate 2, so that the cleaning degree of the surface of the tower plate 2 is increased, the impurities on the surface of the tower plate 2 are prevented from forming scale after long-time precipitation, and the normal work of the purification tower is influenced; the rotating shaft 15 drives the first plate 23 to move, the first plate 23 stirs liquid on the surface of the tower plate 2 within the range of the baffle 21, the liquid movement is accelerated, and the uniformity degree of the liquid is increased, so that the purification efficiency of the flue gas is increased, the phenomenon that the liquid close to the surface of the tower plate 2 contacts the flue gas firstly to react is avoided, the reaction degree of the liquid far away from the surface of the tower plate 2 and the flue gas is weaker than that of the liquid close to the surface of the tower plate 2 and the flue gas, the concentration of the upper layer and the lower layer of the liquid on the surface of the tower plate 2 within the range of the baffle 21 is different, and when the flue gas bubbles in the liquid, the time of the flue gas and the liquid capable of reacting is shortened, so that the purification efficiency of the flue gas is reduced; the rotating shaft 15 drives the first shaft 3 to move, the first shaft 3 drives the circular ring 4 to move, the circular ring 4 is limited to rotate by the mutual attaching effect of the sliding block 42 and the groove 31, the circular ring 4 drives the scraping rod 43 to move, the scraping rod 43 drives the elastic sheet 44 to move, the elastic sheet 44 in the invention is made of corrosion-resistant metal, the square hole 22 on the tower plate 2 is obliquely arranged, the part of the scraping rod 43 away from the circular ring 4 is positioned in the square hole 22, the scraping rod 43 drives the elastic sheet 44 to contact the inner wall of the square hole 22, the elastic sheet 44 scrapes the inner wall of the square hole 22 to scrape impurities attached to the inner wall of the square hole 22, the cleaning degree of the square hole 22 is increased, the moving efficiency of the flue gas is increased, the purifying efficiency of the flue gas is increased, the scaling phenomenon generated in the square hole 22 after long-time work is prevented, the square hole 22 is blocked, the gas cannot bubble through the square hole 22, and the purifying tower submerges is caused, affecting the normal work of the purification tower; due to the square hole 22, impurities after gas-liquid reaction flow down along with liquid from the square hole 22, part of the impurities are attached to part of the inner wall of the square hole 22, and the part without the impurities in the square hole 22 continuously passes through the flue gas, so that the gas movement efficiency is increased, the purification efficiency is increased, and the influence of the impurities on the flue gas passing through the sieve holes in the tower plate after the impurities are attached to the sieve holes in the tower plate in the prior art is avoided; the scraping rod 43 moves along the inner wall of the square hole 22 to drive the circular ring 4 to move in the direction away from the rotating shaft 15, the surface of the first shaft 3 is scraped by the inner surface of the circular ring 4, impurities on the surface of the first shaft 3 are scraped, the cleaning degree of the first shaft 3 is increased, the cleaning degree of liquid is increased, and the liquid is prevented from being secondarily polluted by the impurities on the first shaft 3 due to the fact that the first shaft 3 is stained with too many impurities; the circular ring 4 moves until the scraping rod 43 stops moving due to the blocking of the inner wall of the square hole 22, the first shaft 3 drives the circular ring 4 to continue moving, the circular ring 4 drives the sliding block 42 to move, the sliding block 42 moves along the inner wall of the arc-shaped groove 31 on the first shaft 3, the sliding block 42 is extruded by the groove 31 to slide in the first groove 41 until the sliding block 42 moves to the next groove 31, and the reset spring drives the sliding block 42 to reset; liquid overflows and flows down from the space between the baffle 21 and the inner wall of the tower body 1, an overflow weir is arranged between the baffle 21 and the inner wall of the tower body 1, the liquid flows to the annular plate 45 and then flows to the surface of the lower tower plate 2 along the inclined surface of the annular plate 45 until the liquid flows to the bottom of the tower body 1, the liquid at the bottom of the tower body 1 flows into the circulating module 12 through a waste liquid pipe, the circulating module 12 purifies and reuses the liquid, and the purified liquid enters the liquid outlet module 14 through a water pipe; the gas flows through the tower plate 2 to the demisting module 13, and the demisting module 13 purifies the gas again and then discharges the gas.
In one embodiment of the present invention, the square hole 22 is tapered.
When the device is used, the square hole 22 is arranged to be conical, the aperture of the end, close to the top of the tower body 1, of the square hole 22 is larger than the aperture of the end, far away from the top of the tower body 1, of the square hole 22, the circular ring 4 is arranged on the first shaft 3, the square hole 22 is far away from the rotating shaft 15 to rotate, the circular ring 4 drives the scraping rod 43 to enter the next square hole 22, when the scraping rod 43 drives the elastic sheet 44 to contact the next square hole 22 for the first time, the aperture of the end, close to the top of the tower body 1, of the next square hole 22 is increased, the scraping rod 43 drives the elastic sheet 44 to enter the square hole 22, the movement efficiency of the scraping rod 43 is increased, the removal efficiency of impurities in the square hole 22 is increased, the purification efficiency of smoke is increased, when the scraping rod 43 drives the elastic sheet 44 to enter the next square hole 22, the inner wall, far away from the circular ring 4, of the scraping rod 43 is abutted against the inner wall of the square hole 22, and the circular ring 43 is clamped on the inner wall of the square hole 22, so that the circular ring 4 stops moving, affecting the normal operation of the purification tower.
In one embodiment of the present invention, a scraper 24 is attached to one end of the first plate 23 close to the baffle 21.
During the use, through setting up scraper blade 24, axis of rotation 15 drives a 23 movements of board, a 23 drives the scraper blade 24 movements, scraper blade 24 scrapes baffle 21 and is close to 15 side surfaces of axis of rotation, strike off the impurity on the baffle 21 table, increase the clean degree of baffle 21, thereby increase the motion effect of a 3, and then increase the purification efficiency of flue gas, it is too much to prevent that baffle 21 from being close to the surface pile up impurity of 15 one sides of axis of rotation, after the long-time work of purifying column, baffle 21 is close to the surface scale deposit of 15 one sides of axis of rotation, influence a 3 normal motions of axle, thereby influence purifying column purification efficiency.
In one embodiment of the present invention, the scraper 24 is provided in an arc shape.
When the smoke purifier is used, the scraper 24 is arranged to be arc-shaped, the rotating shaft 15 drives the first plate 23 to move, the first plate 23 drives the scraper 24 to move, the baffle 21 is scraped by the arc-shaped surface of the scraper 24 to be close to the surface of one side of the rotating shaft 15, under the condition of the same acting force, the contact area between objects is reduced, the pressure between the objects is increased, impurities on the surface of the baffle 21, which is close to the rotating shaft 15, are more easily scraped by the scraper 24, the cleaning degree of the surface of the baffle 21 is increased, the moving effect of the first shaft 3 is increased, and the smoke purification efficiency is increased; after the scraper 24 scrapes off the impurities, the impurities are guided by the arc-shaped surface of the scraper 24 to move away from the baffle 21.
In one embodiment of the present invention, a first hole 25 is formed in a central position of the first plate 23.
During the use, through setting up a hole 25, axis of rotation 15 drives a board 23 motion, a board 23 contact and scrapes partial liquid, thereby liquid passes from a hole 25 on a board 23 and crosses, increase the homogeneous degree of liquid on the column plate 2, thereby increase the homogeneous degree of flue gas contact liquid postreaction, prevent a board 23 and scrape behind the liquid, liquid receives a board 23 to promote the influence along with a board 23 motion, make the liquid level of the liquid of a board 23 both sides different, it is inhomogeneous to lead to the liquid distribution on the column plate 2, when the flue gas bubbles and goes out from the position that a board 23 one side liquid level is low, the contact time of flue gas and liquid reduces the reaction degree of flue gas and liquid, cause flue gas purification efficiency to reduce.
In one embodiment of the present invention, a second plate 46 is fixedly connected between the tower plate 2 and the annular plate 45 in the tower body 1.
When the device is used, the second plate 46 is arranged, the surface of the second plate 46 is subjected to smooth treatment, the top of the second plate 46 is attached to the bottom of the tower plate 2, the bottom of the second plate 46 is attached to the inclined surface of the annular plate 45, the rotating shaft 15 drives the second plate 46 to move, the second plate 46 scrapes the bottom of the tower plate 2 and the surface of the second plate 46, the second plate 46 contacts impurities on the bottom of the tower plate 2 and the surface of the second plate 46, and the moving efficiency of the impurities falling to the bottom of the tower body 1 is accelerated, so that the cleaning efficiency of the tower plate 2 and the second plate 46 is increased, the moving efficiency of liquid is increased, and the flue gas purification efficiency is further increased; after the bottom of the tower plate 2 is contacted with the flue gas, part of impurities in the flue gas are contacted with the bottom of the tower plate 2 and attached to the bottom of the tower plate, the second plate 46 scrapes the bottom of the tower plate 2 to scrape the impurities at the bottom of the tower plate 2, and the impurities at the bottom of the tower plate 2 are prevented from scaling under the long-time condition, so that the normal work of the purification tower is influenced.
The specific working process is as follows:
the purification tower is opened, the circulating module 12 conveys liquid to the liquid outlet module 14 through a water pipe, the liquid flows out of the liquid outlet module 14 and flows to the bottom of the tower body 1, the liquid contacts the surface of the tower plate 2 in the flowing process, the liquid is partially accumulated on the tower plate 2 under the limiting action of the baffle plate 21, the liquid overflows from the top of the baffle plate 21 and drips in the square hole 22, the flue gas is discharged to the bottom of the purification tower through the air inlet pipe, the flue gas moves towards the direction of the air outlet pipe in the tower body 1, the motor 11 drives the rotating shaft 15 to move, the rotating shaft 15 drives the first plate 23, and one end, close to the tower plate 2, of the first plate 23 scrapes the surface of the tower plate 2; the rotating shaft 15 drives the first plate 23 to move, the first plate 23 stirs liquid in the range of the baffle 21 on the surface of the tower plate 2, the rotating shaft 15 drives the first shaft 3 to move, the first shaft 3 drives the ring 4 to move, the ring 4 is affected by mutual adhesion of the sliding block 42 and the groove 31 to limit the rotation of the ring 4, the ring 4 drives the scraping rod 43 to move, the scraping rod 43 drives the elastic sheet 44 to contact with the inner wall of the square hole 22, and the elastic sheet 44 scrapes the inner wall of the square hole 22; the scraping rod 43 moves along the inner wall of the square hole 22 to drive the circular ring 4 to move towards the direction far away from the rotating shaft 15, and the surface of the first shaft 3 is scraped by the inner surface of the circular ring 4; the circular ring 4 moves until the scraping rod 43 stops moving due to the blocking of the inner wall of the square hole 22, the first shaft 3 drives the circular ring 4 to continue moving, the circular ring 4 drives the sliding block 42 to move, the sliding block 42 moves along the inner wall of the arc-shaped groove 31 on the first shaft 3, the sliding block 42 is extruded by the groove 31 to slide in the first groove 41 until the sliding block 42 moves to the next groove 31, the return spring drives the sliding block 42 to reset, the circular ring 4 rotates on the first shaft 3, and the circular ring 4 drives the scraping rod 43 to enter the next square hole 22, so that the scraping rod 43 drives the elastic sheet 44 to scrape the inner wall of the next square hole 22; the liquid overflows and flows down from the space between the baffle 21 and the inner wall of the tower body 1, the liquid flows to the annular plate 45 and then flows to the surface of the lower tower plate 2 along the inclined surface of the annular plate 45 until the liquid flows to the bottom of the tower body 1, the liquid at the bottom of the tower body 1 flows into the circulating module 12 through a waste liquid pipe, the circulating module 12 purifies and reuses the liquid, and the purified liquid enters the liquid outlet module 14 again through a water pipe; the gas flows to the demisting module 13 through the tower plate 2, and the demisting module 13 purifies the gas again and then discharges the gas; the first plate 23 drives the scraper 24 to move, the scraper 24 scrapes the surface of one side, close to the rotating shaft 15, of the baffle 21, and impurities on the surface of the baffle 21 are scraped; a plate 23 contacts and scrapes a portion of the liquid, and the liquid passes through a hole 25 on the plate 23; the second plate 46 is moved by the rotating shaft 15, and the second plate 46 scrapes the bottom of the tower plate 2 and the surface of the second plate 46.
The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present 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 given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A chain grate-rotary kiln denitration system comprises a preheating unit, a roasting unit and a flue gas purification unit, wherein the flue gas purification unit comprises a purification tower, and an air outlet pipe, an air inlet pipe and a waste liquid pipe are arranged on the purification tower; the method is characterized in that: the purification tower comprises a tower body (1), a motor (11) and a circulating module (12); a motor (11) is fixedly connected to the center of the bottom of the tower body (1), and a circulating module (12) is arranged on one side of the tower body (1); the top in the tower body (1) is fixedly connected with a demisting module (13), and a liquid outlet module (14) is fixedly connected with the position, close to the demisting module (13), in the tower body (1); a group of tower plates (2) are uniformly and fixedly connected in the tower body (1), the positions, close to the inner wall of the tower body (1), of the tops of the tower plates (2) are fixedly connected with baffle plates (21), a group of square holes (22) are uniformly formed in the tower plates (2), and the square holes (22) are obliquely arranged; a rotating shaft (15) is rotatably connected to the center position in the tower body (1), one end, far away from the tower body (1), of the rotating shaft (15) is fixedly connected with the output end of the motor (11), and one end, far away from the motor (11), of the rotating shaft (15) is close to the liquid outlet module (14); the rotating shaft (15) is positioned at the top of the tower plate (2) and is fixedly connected with a first plate (23), a first shaft (3) is fixedly connected with the surface of the rotating shaft (15) at a position corresponding to the first plate (23), a group of grooves (31) are uniformly formed in the first shaft (3), a circular ring (4) is sleeved on the first shaft (3), a first groove (41) is formed in the position, corresponding to the groove (31), of the circular ring (4), a sliding block (42) is connected in the first groove (41) in a sliding mode, and the sliding block (42) is connected with the first groove (41) through a reset spring; the outer surface of the circular ring (4) is uniformly fixedly connected with scraping rods (43), the scraping rods (43) correspond to the positions of the square holes (22), two sides, far away from the first shaft (3), of the scraping rods (43) are fixedly connected with a group of elastic sheets (44), and the elastic sheets (44) are oppositely and curvedly arranged; the tower is characterized in that annular plates (45) are fixedly connected below the tower plates (2) in the tower body (1), and the annular plates (45) are obliquely arranged.
2. The grate-rotary kiln denitration system according to claim 1, wherein: the square hole (22) is arranged in a conical shape.
3. The grate-rotary kiln denitration system according to claim 2, wherein: one end of the first plate (23) close to the baffle (21) is fixedly connected with a scraper (24).
4. The grate-rotary kiln denitration system according to claim 3, wherein: the scraper (24) is arranged in an arc shape.
5. The grate-rotary kiln denitration system according to claim 4, wherein: a first hole (25) is formed in the center of the first plate (23).
6. The grate-rotary kiln denitration system according to claim 5, wherein: and a second plate (46) is fixedly connected between the tower plate (2) and the annular plate (45) in the tower body (1).
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| CN115040999B (en) | 2024-01-16 |
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Effective date of registration: 20231212 Address after: 230000 East of Dongfeng Avenue, Cuozhen Town, Feidong County, Hefei City, Anhui Province Applicant after: TONGZHENG ENVIRONMENTAL PROTECTION GROUP CO.,LTD. Address before: Room 1201, Building 5, Huijiang New Village, Xicheng Street, Huangyan District, Taizhou City, Zhejiang Province, 318020 Applicant before: Dong Xiangzhi |
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