CN115040999B - Chain grate-rotary kiln denitration system - Google Patents
Chain grate-rotary kiln denitration system Download PDFInfo
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- CN115040999B CN115040999B CN202210488503.2A CN202210488503A CN115040999B CN 115040999 B CN115040999 B CN 115040999B CN 202210488503 A CN202210488503 A CN 202210488503A CN 115040999 B CN115040999 B CN 115040999B
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- 239000007788 liquid Substances 0.000 claims abstract description 120
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000003546 flue gas Substances 0.000 claims abstract description 69
- 238000007790 scraping Methods 0.000 claims abstract description 50
- 238000000746 purification Methods 0.000 claims abstract description 46
- 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 49
- 238000010030 laminating Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 19
- 239000000779 smoke Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000002791 soaking 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
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000002352 blister Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 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
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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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, in particular 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 purifying tower comprises a tower body, a motor and a circulating module; a motor is fixedly connected to the central position of the bottom of the tower body, and a circulation module is arranged on one side of the tower body; through setting up the pole of scraping, the axis of rotation drives a motion of axle, and a motion of axle drives the ring, and the ring receives slider and recess laminating each other to influence restriction ring and rotates, and the ring drives and scrapes the pole motion, scrapes the pole and drives the elastic piece motion, scrapes the pole and drives the inner wall of square hole of elastic piece contact, and the elastic piece scrapes square hole inner wall, scrapes the impurity of attaching on the square hole inner wall, increases square hole's clean degree to 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 grate-rotary kiln denitration system.
Background
Denitration of flue gas means reduction of NOx formed into N 2 Thereby removing NOX in the flue gas, and the flue gas can be divided into wet denitration and dry denitration according to the treatment process. Wet flue gas denitration is to purify coal-fired flue gas by utilizing the principle that liquid absorbent dissolves NOX. The biggest obstacle is that NO is very poorly soluble in water, often requiring the first oxidation of NO to NO 2 The method comprises the steps of carrying out a first treatment on the surface of the For this purpose, NO is generally first passed through an oxidizing agent O 3 、ClO 2 Or KMnO 4 Reacting and oxidizing to generate NO 2 Then NO 2 Absorbed by water or alkaline solution. Wherein wet denitration by a purification tower is most common, and in the working production process of a chain grate-rotary kiln, the flue gas generated in the chain grate-rotary kiln cannot be directly discharged into the air, and the prior art generally comprises a chain grateThe flue gas generated in the rotary kiln is led into a purifying tower through a large-caliber air pipe, and is discharged into the air after being purified.
In the prior art, a patent also appears about a technical scheme of a grate-rotary kiln denitration system, for example, a Chinese patent with the application number of CN2020203151288 discloses a high-efficiency dedusting absorption tower for flue gas denitration, which comprises an absorption tower main body, wherein a waste liquid discharge pipe communicated with the inside of the absorption tower main body is arranged on the tower body close to the bottom end of the absorption tower main body, a flue gas inlet pipe and a flue gas treatment device are also arranged on the absorption tower main body, the flue gas inlet pipe comprises a vent pipe arranged on the absorption tower main body, and a gas distribution net cover is arranged on the inner wall of a gas distribution cover; the flue gas treatment device comprises a booster pump arranged on the absorption tower main body, and a plurality of spray heads which are annularly arranged at equal intervals and are communicated with the inside of the liquid storage disc are arranged on the bottom surface of the liquid storage disc; but this technical scheme exists not enough, this patent gas after the waste gas is soaked spreads screen panel and gas and slowly flows the net, can prolong the contact time of waste gas and liquid medicine, make the cleaner thoroughly to exhaust treatment, but when this patent uses the waste gas that produces at the grate-rotary kiln to carry out denitration treatment, gas slowly passes through the screen panel and slowly flows the net, gas and liquid medicine contact take place chemical reaction and produce impurity, impurity that its produced is detained at screen panel or slowly flows the net, impurity is at the screen panel and slowly flows the net upper structure of net panel in long-time working process, gradually with the screen panel and slowly flow the net jam, lead to the liquid medicine velocity of flow to slow down or stop flowing, cause the tower blocking or flooding phenomenon to take place, influence waste gas 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 overcome the defects in the prior art, the invention provides a denitration system of a chain grate-rotary kiln, which solves the problems that when waste gas generated by the chain grate-rotary kiln is subjected to denitration treatment, the gas is contacted with liquid medicine to generate chemical reaction to generate impurities, the generated impurities are retained on a tower plate, and when the chain grate-rotary kiln works for a long time, the impurities generated by the gas-liquid reaction block air holes to cause a tower flooding phenomenon.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a 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, wherein the purification tower comprises a tower body, a motor and a circulation module; the central position 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 inner top of the tower body is fixedly connected with an air outlet pipe, the outer surface of the tower body is fixedly connected with an air inlet pipe at a position far away from the circulating module, and the bottom of the tower body is fixedly connected with a waste liquid pipe at a position far away from the motor; the top in the tower body is fixedly connected with a demisting module, and a liquid outlet module is fixedly connected to a position, close to the demisting module, in the tower body; a group of tower plates are uniformly and fixedly connected in the tower body, baffle plates are fixedly connected to the positions, close to the inner wall of the tower body, of the top of each tower plate, a group of square holes are uniformly formed in each tower plate, and the square holes are obliquely arranged; a rotating shaft is rotatably connected to 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 rotary shafts are fixedly connected with a first plate at the top of the tower plate, the positions, opposite to the first plate, of the surfaces of the rotary shafts are fixedly connected with a first shaft, a group of grooves are uniformly formed in the first shaft, circular rings are sleeved on the first shaft, a first groove is formed in the positions, corresponding to the grooves, of the circular rings, a sliding block is connected in the first groove in a sliding mode, and the sliding block is connected with the first groove through a reset spring; the outer surface of the circular ring is uniformly and fixedly connected with a scraping rod, the scraping rod corresponds to the square hole, two sides of the scraping rod, which are far away from the first shaft, are fixedly connected with a group of elastic sheets, and the elastic sheets are oppositely bent; the annular plates are fixedly connected to the lower portion of the tower plate in the tower body, and are obliquely arranged.
When the device is used, in the prior art, when the grate-rotary kiln desulfurization and denitrification treatment is carried out, the device is required to pass through a preheating unit, a roasting unit and a smoke purification unit, wherein the preheating unit is used for preheating and partially oxidizing the balls through the grate, the roasting unit is used for roasting the balls at high temperature through soaking and rolling of the rotary kiln, and the smoke purification unit is used for purifying and then discharging harmful smoke discharged from the grate and the rotary kiln through a purification tower; when the flue gas in the chain grate-rotary kiln is purified, the purifying tower is started, the circulating module conveys liquid to the liquid outlet 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 accumulated on the tower plate under the limit action of the baffle plate, the liquid overflows from the top of the baffle plate and drips in the square holes, the flue gas is discharged into the bottom of the purifying tower through the air inlet pipe, the flue gas moves in the tower body towards the direction of the air outlet pipe, and the motor drives the rotating shaft to move. The rotating shaft drives the first plate to move, the first plate agitates the liquid on the surface of the tray in the range of the baffle plate, accelerates the liquid to move, increases the uniformity degree of the liquid, thereby increasing the purification efficiency of the flue gas, avoiding the liquid close to the surface of the tray to be firstly contacted with the flue gas to react, and avoiding the liquid far away from the surface of the tray to react with the flue gas to a weaker degree than the liquid close to the surface of the tray to react with the flue gas, so that the concentration of the upper layer and the lower layer of the liquid on the surface of the tray in the range of the baffle plate are different, and when the flue gas bubbles in the liquid and comes out, the time between the flue gas and the liquid capable of reacting is reduced, thereby reducing the purification efficiency of the flue gas; the rotating shaft drives the first shaft to move, the first shaft drives the circular ring to move, the circular ring is influenced by mutual lamination of the sliding blocks and the grooves to limit the circular ring to rotate, the circular ring drives the scraping rod to move, and the scraping rod drives the elastic piece to move. Due to the square holes, the impurities after gas-liquid reaction flow down along with the liquid from the square holes, part of the impurities are attached to part of the inner walls of the square holes, and part of the impurities in the square holes continuously pass through the smoke, so that the gas movement efficiency is increased, the purification efficiency is increased, and the smoke passing through the holes in the tower plate is prevented from being blocked by the impurities after the impurities are attached to the holes in the tower plate in the prior art; the scraping rod moves along the inner wall of the square hole to drive the circular ring to move in 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, excessive impurities are prevented from being attached to the first shaft, and the liquid is prevented from being polluted by secondary pollution caused by the impurities on the first shaft; the circular ring moves until the scraping rod is blocked by the inner wall of the square hole to stop moving, the first shaft drives the circular ring to continue moving, the circular ring drives the sliding block to move along the inner wall of the arc-shaped groove on the first shaft, the sliding block slides in the first groove under the extrusion of the groove until the sliding block moves to the next groove, and the reset spring drives the sliding block to reset. The liquid overflows and flows down from between the baffle plate and the inner wall of the tower body, an overflow weir is arranged between the baffle plate and the inner wall of the tower body, the liquid flows to the surface of the next tower plate along the inclined surface of the annular plate after flowing to the annular plate until flowing to the bottom of the tower body, the liquid at the bottom of the tower body flows into the circulation module through the waste liquid pipe, the circulation module purifies and reutilizes the liquid, 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 holes are arranged in a conical shape.
During the use, be the toper through setting up square hole, and square hole is close to the one end aperture that square hole was kept away from the tower body top that square hole is greater than square hole, the ring is located square hole and keeps away from axis of rotation position rotation, the ring drives the pole of scraping and get into next square hole, when the pole of scraping drives the elastic piece first time contact next square hole, next square hole is close to the one end aperture grow at tower body top, the pole of scraping drives the elastic piece and gets into square hole, the motion efficiency of pole is scraped in the increase, thereby increase the efficiency of cleaing away of impurity in the square hole, and then increase the purification efficiency of flue gas, prevent when the pole of scraping drives the elastic piece and get into next square hole, one side inner wall that the ring was kept away from to square hole withstands the pole of scraping, thereby with the pole card on square hole inner wall, lead to the ring motion to stop, influence purification tower normal work.
Preferably, one end of the first plate, which is close to the baffle plate, is fixedly connected with a scraping plate.
During the use, through setting up the scraper blade, the axis of rotation drives a board motion, and a board drives the scraper blade motion, and the scraper blade scrapes and moves the baffle and be close to axis of rotation one side surface, scrapes the impurity on the baffle table, increases the clean degree of baffle to increase the motion effect of an axis, and then increase the purification efficiency of flue gas, prevent that the baffle from being close to the surface of axis of rotation one side and pile up impurity too much, after the long-time work of purifying column, the baffle is close to the surface scale deposit of axis of rotation one side, influences an axis normal motion, thereby influences purifying column purification efficiency.
Preferably, the scraping plate is arranged in an arc shape.
When the scraper is in use, the scraper is arranged in an arc shape, the rotating shaft drives the first plate to move, the first plate drives the scraper to move, the arc surface of the scraper scrapes the baffle plate to be close to the surface of one side of the rotating shaft, under the condition of the same acting force, the contact area between objects is reduced, the pressure intensity between the objects is increased, the scraper can scrape impurities on the surface of the baffle plate, which is close to the surface of the rotating shaft, more easily, the cleaning degree of the surface of the baffle plate is increased, the movement effect of the first shaft is increased, and the purifying efficiency of smoke is further increased; after the scraping plate scrapes the impurities, the impurities move 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 and scrape some liquid, thereby liquid passes from a hole on a board and cross, increase the even degree of liquid on the column plate, thereby increase the even degree of reaction behind the flue gas contact liquid, prevent a board and scrape behind the liquid, liquid receives a board to promote the influence along with a board motion, make the liquid level of a board both sides liquid different, result in the liquid distribution on the column plate inhomogeneous, when the flue gas is gone out from the position bubble of a board one side liquid level height low, 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, the tower body is internally provided with a second plate fixedly connected between the tower plate and the annular plate.
When the device is used, the second plate is arranged, the surface of the second plate is smooth, 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 impurities are accelerated to fall to the movement efficiency of the bottom of the tower body, so that the cleaning efficiency of the tower plate and the second plate is improved, the movement efficiency of liquid is improved, and the flue gas purification efficiency is further improved; after the bottom of the tower plate contacts the flue gas, part of impurities in the flue gas contact the bottom of the tower plate and adhere to the bottom of the tower plate, and the second plate scrapes the bottom of the tower plate to scrape the impurities at the bottom of the tower plate, so that the impurities at the bottom of the tower plate are prevented from scaling under the condition of long time, and the normal operation of the purifying tower is influenced.
The beneficial effects of the invention are as follows:
1. according to the grate-rotary kiln denitration system, the scraping rod is 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 rod to move, the scraping rod drives the elastic piece to move, the elastic piece is driven by the scraping rod to contact the inner wall of the square hole, the elastic piece scrapes 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, and therefore the movement efficiency of smoke is increased, and the purification efficiency of the smoke is further increased.
2. According to the grate-rotary kiln denitration system, the square holes are conical, the circular ring is arranged on the first shaft and located at the position, away from the rotating shaft, of the square holes, the circular ring drives the scraping rod to enter the next square hole, when the scraping rod drives the elastic piece 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 enlarged, the scraping rod drives the elastic piece to enter the square hole, the movement efficiency of the scraping rod is improved, and therefore the removal efficiency of impurities in the square holes is improved, and the purification efficiency of smoke is further improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of a purification tower of the present invention;
FIG. 2 is a schematic view of a purifying column according to the present invention;
FIG. 3 is a schematic view of another structure of the purifying column of the present invention;
FIG. 4 is a perspective view of a tray of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 2 at A;
FIG. 6 is a partial enlarged view at B in FIG. 3;
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 column 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 piece 44, the annular plate 45 and the second plate 46.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 7, the 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 purifying tower comprises a tower body 1, a motor 11 and a circulating module 12; a motor 11 is fixedly connected to the central position of the bottom of the tower body 1, and a circulation 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 to a 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, baffle plates 21 are fixedly connected to the top of the tower plates 2 close to the inner wall of the tower body 1, 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 central position in the tower body 1, one end of the rotating shaft 15, which is far away from the tower body 1, is fixedly connected with the output end of the motor 11, and one end of the rotating shaft 15, which is far away from the motor 11, is close to the liquid outlet module 14; the rotating shafts 15 are fixedly connected with a first plate 23 at the top position of the tower plate 2, the surfaces of the rotating shafts 15 are fixedly connected with a first shaft 3 at the positions 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 grooves 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 and fixedly connected with a scraping rod 43, the scraping rod 43 corresponds to the square hole 22, two sides of the scraping rod 43 far away from the first shaft 3 are fixedly connected with a group of elastic sheets 44, and the elastic sheets 44 are oppositely bent; the annular plates 45 are fixedly connected to the tower body 1, which is positioned below the tower plate 2, and the annular plates 45 are obliquely arranged.
When the device is used, in the prior art, when the grate-rotary kiln desulfurization and denitrification treatment is carried out, the device is required to pass through a preheating unit, a roasting unit and a smoke purification unit, wherein the preheating unit is used for preheating and partially oxidizing the balls through the grate, the roasting unit is used for roasting the balls at high temperature through soaking and rolling of the rotary kiln, and the smoke purification unit is used for purifying and then discharging harmful smoke discharged from the grate and the rotary kiln through a purification tower; when the flue gas in the chain grate-rotary kiln is purified, a purifying tower is started, 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 drops in the square holes 22, the flue gas is discharged into the bottom of the purifying tower through the air inlet pipe, the flue gas moves in the tower body 1 towards the direction of the air outlet pipe, the motor 11 drives the rotating shaft 15 to move, the motor 11 in the invention is a conventional speed reducing motor 11 in the prior art, the rotating shaft 15 drives the first plate 23, one end of the first plate 23, which is close to the tower plate 2, scrapes the surface of the tower plate 2, scrapes off impurities generated after the flue gas reacts with the liquid, the surface of the tower plate 2 is increased, the impurities on the surface of the tower plate 2 are prevented from scaling after long-time precipitation, and the normal work of the purifying tower is influenced; the rotating shaft 15 drives the first plate 23 to move, the first plate 23 agitates the liquid on the surface of the tray 2 within the range of the baffle plate 21, accelerates the liquid to move, increases the uniformity degree of the liquid, thereby increasing the purification efficiency of the flue gas, avoiding the liquid close to the surface of the tray 2 from firstly contacting the flue gas to react, and avoiding the reaction degree of the liquid far away from the surface of the tray 2 and the flue gas to be weaker than the reaction degree of the liquid close to the surface of the tray 2 and the flue gas, so that the concentration of the upper layer and the lower layer of the liquid on the surface of the tray 2 within the range of the baffle plate 21 are different, and when the flue gas bubbles in the liquid, the time between the flue gas and the liquid which can react is reduced, thereby reducing the purification efficiency of the flue gas; 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 influenced by mutual lamination of the sliding blocks 42 and the grooves 31 to limit the circular ring 4 to rotate, the circular ring 4 drives the scraping rods 43 to move, the scraping rods 43 drive the elastic pieces 44 to move, the elastic pieces 44 are made of corrosion-resistant metal, as the square holes 22 on the tower plates 2 are obliquely arranged, the part of the scraping rods 43 far away from the circular ring 4 is positioned in the square holes 22, the scraping rods 43 drive the elastic pieces 44 to contact the inner walls of the square holes 22, the elastic pieces 44 scrape the inner walls of the square holes 22 to scrape impurities attached to the inner walls of the square holes 22, the cleaning degree of the square holes 22 is increased, the movement efficiency of smoke is increased, the cleaning efficiency of the smoke is increased, the scaling phenomenon generated in the square holes 22 after long-time work is prevented, the square holes 22 are blocked, the gas cannot bubble out through the square holes 22, the phenomenon of flooding of a purifying tower is caused, and the normal work of the purifying tower is influenced; due to the square holes 22, the impurities after gas-liquid reaction flow down along with the liquid from the square holes 22, part of the impurities are attached to part of the inner walls of the square holes 22, and the part of the square holes 22 without the impurities continuously passes through the flue gas, so that the gas movement efficiency is increased, the purification efficiency is increased, and the flue gas passing through the sieve holes in the tower plate is prevented from being blocked by the impurities after the impurities are attached to the sieve holes in the tower plate in the prior art; the scraping rod 43 moves along the inner wall of the square hole 22 to drive the circular ring 4 to move away from the rotating shaft 15, the inner surface of the circular ring 4 scrapes the surface of the first shaft 3, 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, excessive impurities are prevented from being adhered to the first shaft 3, and the liquid is prevented from being polluted by the impurities on the first shaft 3; the ring 4 moves until the scraping rod 43 stops moving under the influence of the action of a return spring until the scraping rod 43 stops moving under the action of the inner wall of the square hole 22, the first shaft 3 drives the ring 4 to continue moving, the 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 into the first groove 41 by the groove 31 until the sliding block 42 moves to the next groove 31, and the return spring drives the sliding block 42 to reset; the liquid overflows from between the baffle plate 21 and the inner wall of the tower body 1, in the invention, an overflow weir is arranged between the baffle plate 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 next 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 circulation module 12 through the waste liquid pipe, the circulation module 12 purifies and reutilizes the liquid, and the purified liquid enters the liquid outlet module 14 again through the water pipe; the gas flows through the tray 2 to the demisting module 13, and the demisting module 13 purifies the gas again and discharges the gas.
As an embodiment of the present invention, the square hole 22 is provided in a tapered shape.
During the use, be the toper through setting up square hole 22, and square hole 22 is close to the one end aperture at tower body 1 top and is greater than square hole 22 and keep away from the one end aperture at tower body 1 top, ring 4 is located square hole 22 and keeps away from axis of rotation 15 position rotation on first axle 3, ring 4 drives and scrapes pole 43 and get into next square hole 22, when scraper 43 drives elastic piece 44 first contact next square hole 22, next square hole 22 is close to the one end aperture grow at tower body 1 top, scraper 43 drives elastic piece 44 and gets into square hole 22, increase the motion efficiency of scraper 43, thereby increase the scavenging efficiency of impurity in the square hole 22, and then increase the purification efficiency of flue gas, prevent scraper 43 and drive elastic piece 44 and get into next square hole 22, one side inner wall that square hole 22 kept away from ring 4 withstands scraper 43, thereby with scraper 43 card on square hole 22 inner wall, result in ring 4 motion to stop, influence purifying tower normal work.
As an embodiment of the present invention, a scraper 24 is fixedly connected to an end of the first plate 23 near the baffle 21.
During the use, through setting up scraper blade 24, axis of rotation 15 drives board 23 motion, board 23 drives scraper blade 24 motion, scraper blade 24 scrapes baffle 21 and is close to axis of rotation 15 one side surface, strike off the impurity on the baffle 21 table, increase the clean degree of baffle 21, thereby increase the motion effect of an axle 3, and then increase the purification efficiency of flue gas, prevent that the surface that baffle 21 is close to axis of rotation 15 one side from piling up impurity too much, after the long-time work of purifying column, the surface scale deposit that baffle 21 is close to axis of rotation 15 one side influences an axle 3 normal motion, thereby influence purifying column purification efficiency.
In one embodiment of the present invention, the blade 24 is provided in an arc shape.
When the scraper 24 is arranged in an arc shape, the rotating shaft 15 drives the first plate 23 to move, the first plate 23 drives the scraper 24 to move, the arc-shaped surface of the scraper 24 scrapes the surface of the baffle 21, which is close to one side surface 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, the scraper 24 can scrape impurities on the surface of the baffle 21, which is close to one side surface of the rotating shaft 15, more easily, the cleaning degree of the surface of the baffle 21 is increased, and the movement effect of the first shaft 3 is increased, so that the purification efficiency of smoke is increased; after the scraper 24 scrapes off the foreign matter, the foreign matter moves away from the baffle 21 by the guiding action of the arcuate surface of the scraper 24.
As an embodiment of the present invention, a first hole 25 is formed in the center of the first plate 23.
During the use, through setting up a hole 25, the axis of rotation 15 drives a board 23 motion, a board 23 contact and scrape some liquid, thereby liquid passes from a hole 25 on a board 23 and cross, increase the even degree of liquid on the column plate 2, thereby increase the even degree of reaction behind the flue gas contact liquid, prevent a board 23 and scrape behind the liquid, liquid is pushed the influence along with a board 23 motion by a board 23, make a board 23 liquid level of liquid of both sides different, result in the liquid distribution on the column plate 2 inhomogeneous, when the flue gas is gone out from a board 23 one side liquid level low position tympanic bulla, the contact time of flue gas and liquid reduces, reduce the degree of reaction of flue gas and liquid, cause flue gas purification efficiency to reduce.
As an implementation mode of the 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 smooth, 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 movement 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 improved, the movement efficiency of liquid is improved, and the flue gas purification efficiency is further improved; after the bottom of the tower plate 2 contacts the flue gas, part of impurities in the flue gas contact the bottom of the tower plate 2 and adhere to the bottom of the tower plate 2, and the second plate 46 scrapes the bottom of the tower plate 2 to scrape the impurities at the bottom of the tower plate 2, so that the impurities at the bottom of the tower plate 2 are prevented from scaling under the long-time condition, and the normal operation of the purifying tower is influenced.
The specific working procedure is as follows:
starting the purifying tower, conveying liquid to the liquid outlet module 14 by the circulation module 12 through a water pipe, enabling the liquid to flow out of the liquid outlet module 14 and flow to the bottom of the tower body 1, enabling the liquid to contact the surface of the tower plate 2 in the flowing process of the liquid, enabling the liquid to be accumulated on the tower plate 2 under the limiting action of the baffle plate 21, enabling the liquid to overflow from the top of the baffle plate 21 and drop in the square holes 22, discharging flue gas into the bottom of the purifying tower through the air inlet pipe, enabling the flue gas to move in the direction of the air outlet pipe in the tower body 1, enabling the motor 11 to drive the rotating shaft 15 to move, enabling the rotating shaft 15 to drive the first plate 23, and enabling one end, close to the tower plate 2, of the first plate 23 to scrape the surface of the tower plate 2; the rotating shaft 15 drives the first plate 23 to move, the first plate 23 agitates the liquid on the surface of the tray 2 within the range of the baffle 21, 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 under the influence of mutual lamination of the sliding blocks 42 and the grooves 31, the circular ring 4 drives the scraping rod 43 to move, the scraping rod 43 drives the elastic piece 44 to contact the inner wall of the square hole 22, and the elastic piece 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 away from the rotating shaft 15, and the inner surface of the circular ring 4 scrapes the surface of the first shaft 3; the ring 4 moves until the scraping rod 43 is blocked by the inner wall of the square hole 22 to stop moving, the first shaft 3 drives the ring 4 to continue moving, the 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 into the first groove 41 until the sliding block 42 moves to the next groove 31, the reset spring drives the sliding block 42 to reset, the ring 4 rotates on the first shaft 3, and the ring 4 drives the scraping rod 43 to enter the next square hole 22, so that the scraping rod 43 drives the elastic piece 44 to scrape the inner wall of the next square hole 22; the liquid overflows from between the baffle 21 and the inner wall of the tower body 1 and flows down, the liquid flows to the annular plate 45 and then flows to the surface of the next 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 circulation module 12 through the waste liquid pipe, the circulation module 12 purifies and reutilizes the liquid, and the purified liquid enters the liquid outlet module 14 through the water pipe again; the gas flows to a 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 scraping plate 24 to move, and the scraping plate 24 scrapes the surface of one side of the baffle 21, which is close to the rotating shaft 15, so as to scrape impurities on the surface of the baffle 21; the first plate 23 contacts and scrapes a portion of the liquid, which passes through the first holes 25 in the first plate 23 so as to pass over; the rotating shaft 15 drives the second plate 46 to move, and the second plate 46 scrapes the bottom of the tray 2 and the surface of the second plate 46.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The 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 purifying tower comprises a tower body (1), a motor (11) and a circulating module (12); a motor (11) is fixedly connected to the central position of the bottom of the tower body (1), and a circulation 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 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), baffle plates (21) are fixedly connected to the top of the tower plates (2) close to the inner wall of the tower body (1), 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 central position in the tower body (1), one end, 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, away from the motor (11), of the rotating shaft (15) is close to the liquid outlet module (14); the rotary shafts (15) are fixedly connected with a first plate (23) at the top of the tower plate (2), the positions of the surfaces of the rotary shafts (15) opposite to the first plate (23) are fixedly connected with a first shaft (3), 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 grooves (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 and fixedly connected with a scraping rod (43), the scraping rod (43) corresponds to the square hole (22), a group of elastic sheets (44) are fixedly connected to two sides, far away from the first shaft (3), of the scraping rod (43), and the elastic sheets (44) are oppositely bent; the annular plates (45) are fixedly connected to the tower body (1) and positioned below the tower plates (2), and the annular plates (45) are obliquely arranged;
the square holes (22) are arranged in a conical manner; one end of the first plate (23) close to the baffle (21) is fixedly connected with a scraping plate (24); the scraping plate (24) is arranged in an arc shape; a first hole (25) is formed in the center of the first plate (23).
2. A grate-rotary kiln denitration system according to claim 1, characterized in that: 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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