CN113617198A - Flue gas desulfurization and purification system - Google Patents
Flue gas desulfurization and purification system Download PDFInfo
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- CN113617198A CN113617198A CN202111015045.2A CN202111015045A CN113617198A CN 113617198 A CN113617198 A CN 113617198A CN 202111015045 A CN202111015045 A CN 202111015045A CN 113617198 A CN113617198 A CN 113617198A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 239000003546 flue gas Substances 0.000 title claims abstract description 122
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 58
- 230000023556 desulfurization Effects 0.000 title claims abstract description 58
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 235000019738 Limestone Nutrition 0.000 claims abstract description 82
- 239000006028 limestone Substances 0.000 claims abstract description 82
- 239000002002 slurry Substances 0.000 claims abstract description 48
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 9
- 238000004537 pulping Methods 0.000 claims abstract description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 72
- 239000007921 spray Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 52
- 239000002245 particle Substances 0.000 abstract description 26
- 238000007790 scraping Methods 0.000 abstract description 26
- 238000009825 accumulation Methods 0.000 abstract description 9
- 238000007664 blowing Methods 0.000 abstract description 7
- 239000000779 smoke Substances 0.000 description 17
- 230000015572 biosynthetic process Effects 0.000 description 15
- 230000008569 process Effects 0.000 description 12
- 230000000630 rising effect Effects 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 241000207965 Acanthaceae Species 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241001282153 Scopelogadus mizolepis Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
- B08B9/0936—Cleaning containers, e.g. tanks by the force of jets or sprays using rotating jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- 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
Abstract
The invention belongs to the technical field of flue gas desulfurization, and particularly relates to a flue gas desulfurization purification system which comprises a gas transmission device, a desulfurization tower, a pulping device, a slurry conveying device and a slurry recovery device; the gas transmission device is used for transmitting the flue gas into the desulfurizing tower; according to the invention, through the arrangement of the blade plates, the blade plates scrape the inner wall of the tower body under the blowing of the flue gas, so that scaling particles on the inner wall of the tower body fall off under the scraping of the blade plates, the accumulation of scaling on the inner wall of the tower body is avoided, on one hand, the situation that a scaling body generated when a scaling layer falls off is too large, and thus a pipeline for recovering slurry is blocked is prevented, on the other hand, the blade plates play a guiding role on the flue gas, when the inner wall of the tower body is scaled too much, the speed of the blade plates which is blocked by scaling is reduced, the flow velocity of the flue gas at the blade plates is reduced, the contact time of the flue gas and an alkaline limestone solution is increased, the desulfurization effect of the alkaline limestone solution on the flue gas is enhanced, and the desulfurization effect of the desulfurization tower is improved.
Description
Technical Field
The invention belongs to the technical field of flue gas desulfurization, and particularly relates to a flue gas desulfurization purification system.
Background
Flue Gas Desulfurization (FGD) is an effective desulfurization method applied in large scale in industrial industry, and can be divided into a dry method, a semi-dry method and a wet method, wherein the dry method and the semi-dry method have low efficiency and certain limitation, so that the wet method desulfurization is the main development direction of the existing desulfurization, the wet method flue gas desulfurization adopts a gas-liquid reaction of a liquid absorbent under an ionic condition to further remove sulfur dioxide in flue gas, and the system has the advantages of simple equipment, stable and reliable operation and high desulfurization efficiency.
For example, a chinese patent with application number CN201310308518.7 discloses a wet flue gas desulfurization tower, which achieves the purpose of improving the desulfurization efficiency and the operation reliability by improving the atomization effect of the desulfurization slurry and the nozzle flow passage; the improved nozzle has low requirement on the pressure of the desulfurization slurry, reduces the blocking probability of the nozzle and improves the removal rate of sulfur dioxide; the structure of the conventional cyclone dehydrator is improved, the ascending cyclone diameter of the flue gas is increased, the dehydration and demisting effects of the washed flue gas are improved, and the corrosion and dirt deposition to a downstream flue and equipment are reduced; but this technical scheme can not effectively be solved because the shower sprays the lime stone solution of basicity, make the lime stone solution of basicity downflow along the tower body inner wall, so sulfur dioxide in the flue gas contacts and takes place the reaction with the lime stone solution of basicity on the tower body inner wall, make the scale deposit of tower body inner wall, the continuous accumulation of tower body inner wall scale deposit layer, the scale deposit body that produces when making the scale deposit drop on the one hand is too big, make big scale deposit body drop the thick liquid pond, thereby block up the pipeline that the thick liquid was retrieved, reduce the waste liquid recovery efficiency in the desulfurizing tower, on the other hand scale deposit thickness increases, make the air current distribution in the tower body receive the influence, accelerate the velocity of flow of flue gas, make the contact time of flue gas and lime stone solution of basicity reduce, thereby reduce the desulfurization effect of desulfurizing tower, and then cause this technical scheme's limitation.
In view of this, in order to overcome the above technical problems, the present invention provides a flue gas desulfurization purification system, which solves the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a flue gas desulfurization purification system, through the arrangement of blades, the blades scrape the inner wall of a tower body under the blowing of flue gas, scaling particles on the inner wall of the tower body drop under the scraping of the blades, the accumulation of scaling on the inner wall of the tower body is avoided, on one hand, a scaling body generated when a scaling layer drops is prevented from being overlarge, so that a pipeline for recovering slurry is blocked, on the other hand, the blades play a guiding role on the flue gas, when the scaling on the inner wall of the tower body is large, the blocking and scraping speed of the blades due to scaling is reduced, so that the flow velocity of the flue gas at the blades is reduced, the contact time of the flue gas and an alkaline limestone solution is increased, the desulfurization effect of the alkaline limestone solution on the flue gas is enhanced, and the desulfurization effect of a desulfurization tower is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a flue gas desulfurization purification system, which comprises a gas transmission device, a desulfurization tower, a pulping device, a slurry transmission device and a slurry recovery device, wherein the gas transmission device is connected with the desulfurization tower; the gas transmission device is used for transmitting the flue gas into the desulfurizing tower; the desulfurizing tower is used for desulfurizing flue gas in the reaction inside the desulfurizing tower; the pulping device is used for manufacturing alkaline limestone solution; the slurry conveying device is used for conveying an alkaline limestone solution into the desulfurizing tower to react with sulfur dioxide in the flue gas; the slurry recovery device is used for recovering and treating alkaline limestone solution after reaction with sulfur dioxide in the desulfurizing tower;
the desulfurizing tower comprises a tower body, a slurry pool, a spray pipe, a demisting plate and a controller; the side wall of the tower body is provided with an air inlet, and the upper end of the tower body is provided with an air outlet; the slurry pool is positioned at the lower end of the tower body and is fixedly connected with the inner wall of the tower body; a liquid outlet is formed in the outer wall of the tower body; the liquid outlets are communicated with the slurry tank, and one end of the liquid outlet, which is far away from the slurry tank, is connected with a slurry recovery device through a recovery pipe; the spraying pipe is fixedly connected with the inner wall of the tower body and is positioned above the air inlet; the demisting plate is positioned above the spray pipe and fixedly connected with the inner wall of the tower body; an installation frame is arranged between the spray pipe and the air inlet; a rotating rod is rotatably arranged in the center of the mounting rack; the surface of the rotating rod is fixedly connected with a blade plate; the blade plate is in sliding contact with the inner wall of the tower body; the controller is used for controlling the automatic operation of the desulfurizing tower;
in the prior art, a spray pipe sprays alkaline limestone solution, so that the alkaline limestone solution flows downwards along the inner wall of a tower body, when smoke is introduced, sulfur dioxide in the smoke contacts and reacts with the alkaline limestone solution on the inner wall of the tower body, the inner wall of the tower body is scaled, and a scaling layer on the inner wall of the tower body is accumulated continuously, so that a scaling body generated when the scaling layer falls off is overlarge, the large scaling body falls into a slurry pool, a recovery pipe is blocked, the waste liquid recovery efficiency in a desulfurization tower is reduced, the thickness of the scaling layer is increased, the air flow distribution in the tower body is influenced, the flow speed of the smoke is accelerated, the contact time of the smoke and the alkaline limestone solution is reduced, and the desulfurization effect of the desulfurization tower is reduced;
when the device works, the controller controls alkaline limestone solution to be sprayed out through the spray pipe, at the moment, flue gas enters the tower body through the air inlet and impacts the blade plate, the blade plate drives the rotating rod to rotate under the pushing of the flue gas, the alkaline limestone solution sprayed out of the spray pipe reacts with sulfur dioxide in rising flue gas, the sulfur dioxide in the flue gas is absorbed, the flue gas without the sulfur dioxide continuously rises and passes through the demisting plate to remove water mist contained in the flue gas, the flue gas is discharged from the air outlet at the upper end of the desulfurizing tower, when the alkaline limestone solution sprayed out of the spray pipe close to the inner wall of the tower body flows downwards along the inner wall of the tower body and reacts with the sulfur dioxide in the flue gas to be condensed into scale, during the rotation process of the blade plate, one end of the blade plate far away from the rotating rod can scrape scale particles on the inner wall of the tower body, so that the scale particles condensed on the inner wall of the tower body fall off under the scraping of the blade plate, the falling scaling particles enter the slurry pool, and the falling scaling particles enter the recovery pipe along with the slurry from the liquid outlet for recovery treatment, so that the accumulation of scaling on the inner wall of the tower body is avoided;
according to the invention, through the arrangement of the blade plates, the blade plates scrape the inner wall of the tower body under the blowing of the flue gas, so that scaling particles on the inner wall of the tower body fall off under the scraping of the blade plates, the accumulation of scaling on the inner wall of the tower body is avoided, on one hand, the situation that a scaling body generated when a scaling layer falls off is too large, and thus a pipeline for recovering slurry is blocked is prevented, on the other hand, the blade plates play a guiding role on the flue gas, when the inner wall of the tower body is scaled too much, the speed of the blade plates which is blocked by scaling is reduced, the flow velocity of the flue gas at the blade plates is reduced, the contact time of the flue gas and an alkaline limestone solution is increased, the desulfurization effect of the alkaline limestone solution on the flue gas is enhanced, and the desulfurization effect of the desulfurization tower is improved.
Preferably, a first cavity is formed in the rotating rod; a second cavity is formed in the blade plate, and a circular hole is formed in the windward side of the blade plate; the round hole is communicated with the second cavity; the first cavity is communicated with the second cavity; a water inlet pipe is arranged at the upper end of the mounting rack; the water inlet pipe penetrates through the mounting frame to be communicated with the first cavity, and the water inlet pipe is rotatably connected with the rotating rod; when the device works, the controller controls the alkaline limestone solution to be introduced through the water inlet pipe and enter the first cavity, so that the alkaline limestone solution enters the second cavity through the first cavity and flows out of the round hole in the second cavity, the alkaline limestone solution can generate reverse driving force on the blade plate, the rotation of the blade plate is accelerated, the scraping effect of the blade plate on the inner wall of the tower body is improved, when the blade plate scrapes the inner wall of the tower body, the alkaline limestone solution sprayed from the round hole close to the inner wall of the tower body can wash the scraped inner wall of the tower body, so that scaling particles adhered to the inner wall of the tower body and not falling off can quickly fall off under the washing of the alkaline limestone solution, the scaling effect of the blade plate on the inner wall of the tower body is improved, when the blade plate rotates to the position of the air inlet, sulfur dioxide in the flue gas can firstly contact and react with the alkaline limestone solution sprayed from the round hole, when high-concentration sulfur dioxide is treated, the alkaline limestone solution plays a role in multiple desulfurization on the flue gas, so that the purification effect of the sulfur dioxide in the flue gas is improved; according to the invention, through the arrangement of the round hole, the alkaline limestone solution introduced into the water inlet pipe is sprayed out through the round hole, so that on one hand, the rotating speed of the blade plate is accelerated, the scraping effect of the blade plate on the inner wall of the tower body is improved, on the other hand, the impact can be carried out on the scaling particles which are scraped by the blade plate but still adhered to the inner wall of the tower body, the falling of the scaling particles is accelerated, and the practical application effect of the invention is further improved.
Preferably, the leeward side of the blade plate is fixedly connected with a conical bump; the tip of the lug is in sliding contact with the inner wall of the tower body; when the device works, in the rotating process of the blade plates, the convex blocks positioned on the leeward side of the blade plates synchronously rotate along with the blade plates, when the hardness of the scale formation layer on the inner wall of the tower body is higher, the tips of the convex blocks can be firstly contacted with the scale formation on the inner wall of the tower body, so that the scale formation layer on the inner wall of the tower body is cracked under the impact of the tips of the convex blocks, the blade plates can scrape the scale formation on the inner wall of the tower body conveniently, the blade plates are prevented from being blocked by the hard scale formation layer to cause the direct blocking of the blade plates, and meanwhile, the falling of the scale formation on the inner wall of the tower body is accelerated; according to the invention, through the arrangement of the convex block, the tip of the convex block can cut and crack the hard scaling layer, so that the abrasion degree of the blade plate subjected to the scaling layer is reduced, the strength of the blade plate is improved, the service life and the use effect of the blade plate are improved, and the actual application effect of the invention is effectively improved.
Preferably, the cross section of each blade plate is L-shaped, the vertical surface of each blade plate is perpendicular to the bottom surface of the tower body, and the angle between the vertical surface of each blade plate and the inclined surface of each blade plate is 150-170 degrees; when the device works, when smoke enters through the air inlet, the smoke is blown to the blade plates, so that the smoke flows downwards along the inclined surfaces of the blade plates, the smoke is blocked by the blade plates and is gathered below the blade plates, the smoke is in a rising state in the tower body, the rising smoke is blocked by the inclined surfaces of the blade plates, the rising speed of the smoke is reduced, the contact time of the smoke and an alkaline limestone solution is increased, the smoke gathered below the blade plates is in contact with the alkaline limestone solution sprayed from the windward surfaces of the blade plates, the sulfur dioxide purification effect in the smoke is improved, and the smoke rises to generate an upward inclined pushing force on the blade plates, so that the rotating speed of the blade plates is accelerated; the scraping effect of the blade plate is improved; according to the invention, the blade plate is arranged in an L shape, so that on one hand, the flow guide effect is exerted on the flue gas, the rising speed of the flue gas is reduced, the contact time of the flue gas and the alkaline limestone solution is prolonged, the purification effect of sulfur dioxide in the flue gas is improved, on the other hand, the flue gas is positioned below the blade plate, the flue gas generates an upward inclined pushing force on the blade plate, and the rotating speed of the blade plate is accelerated; through 150 with the angle between the vertical face of acanthus leaf and the inclined plane for giving once more 170, can enough guarantee that the flue gas still has stronger blowing dynamics to acanthus leaf inclined plane, can make the acanthus leaf produce the effect of water conservancy diversion to the flue gas again.
Preferably, the surface of the rotating rod is provided with an inclined hole; the inclined hole is communicated with the first cavity and faces to the leeward side of the blade plate; the round hole on the inclined plane of the blade plate is parallel to the bottom surface of the tower body; the round holes are communicated with the second cavity, and the number of the round holes is increased along with the distance from the rotating rod; when the device works, when alkaline limestone solution is filled into the rotating rod, the alkaline limestone solution is sprayed out through the inclined holes on the surface of the rotating rod, so that the alkaline limestone solution is sprayed to the lee side of the blade plate, the lee side of the blade plate is scraped by the blade plate, scales adhered to the surface of the blade plate fall off under the impact of the alkaline limestone solution, and the alkaline limestone solution continuously impacts the scraping surfaces of the lug and the blade plate, so that the alkaline limestone solution cools the tip of the lug and the scraping surfaces of the blade plate, the service life of the tip of the lug and the scraping surfaces of the blade plate is prolonged, the number of round holes is continuously increased along with the continuous approach of the blade plate to the inner wall of the tower body, the water yield at the edge of the blade plate is increased, the reverse driving force of water flow at the edge of the blade plate is continuously increased, the rotating speed of the blade plate pushed by the water flow sprayed out of the round holes is accelerated, and the scraping effect of the blade plate to the inner wall of the tower body is improved, the practical application effect of the invention is improved.
Preferably, balls are arranged below the leaf plates; the round balls are fixedly connected with the leaf plates through ropes; when the anti-corrosion device works, in the rotating process of the blade plate, the blade plate pulls the ball to rotate through the thread rope, and the thread rope is made of glass fiber materials, so that the corrosion resistance of the thread rope is enhanced; in the rotating process of the blade plates, the blade plates scrape scales on the inner wall of the tower body, so that the blade plates pushed by airflow generate speed difference to cause the centrifugal force to change, the round ball swings to impact the scales on the inner wall of the tower body, and in the rotating process of the round ball, the round ball is contacted with the inner wall of the tower body and frequently impacts the inner wall of the tower body under the action of the centrifugal force, so that a hard scale formation layer on the inner wall of the tower body is loosened under the impact of the round ball, a lug on the leeward side of the rear blade plate can impact the loosened hard scale formation layer to be broken conveniently, the falling of the scale formation layer on the inner wall of the tower body is accelerated, and the practical application effect of the invention is further improved.
The invention has the following beneficial effects:
1. according to the invention, through the arrangement of the blade plates, the blade plates scrape the inner wall of the tower body under the blowing of the flue gas, so that scaling particles on the inner wall of the tower body fall off under the scraping of the blade plates, the accumulation of scaling on the inner wall of the tower body is avoided, on one hand, the situation that a scaling body generated when a scaling layer falls off is too large, and thus a pipeline for recovering slurry is blocked is prevented, on the other hand, the blade plates play a guiding role on the flue gas, when the inner wall of the tower body is scaled too much, the speed of the blade plates which is blocked by scaling is reduced, the flow velocity of the flue gas at the blade plates is reduced, the contact time of the flue gas and an alkaline limestone solution is increased, the desulfurization effect of the alkaline limestone solution on the flue gas is enhanced, and the desulfurization effect of the desulfurization tower is improved.
2. According to the invention, through the arrangement of the round hole, the alkaline limestone solution introduced into the air inlet pipe is sprayed out through the round hole, so that on one hand, the rotating speed of the blade plate is accelerated, the scraping effect of the blade plate on the inner wall of the tower body is improved, on the other hand, the impact can be carried out on the scaling particles which are scraped by the blade plate but still adhered to the inner wall of the tower body, the falling of the scaling particles is accelerated, and the practical application effect of the invention is further improved.
3. According to the invention, through the arrangement of the convex block, the tip of the convex block can cut and crack the hard scaling layer, so that the abrasion degree of the blade plate subjected to the scaling layer is reduced, the strength of the blade plate is improved, the service life and the use effect of the blade plate are improved, and the actual application effect of the invention is effectively improved.
Drawings
The invention is further described with reference to the following figures and embodiments.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an internal structural view of the present invention;
FIG. 3 is a perspective view of a louver according to the present invention;
in the figure: 1. a tower body; 11. an air inlet; 12. an air outlet; 13. a liquid outlet; 131. a recovery pipe; 2. a slurry tank; 3. a shower pipe; 4. a defogging plate; 5. a mounting frame; 51. a rotating rod; 511. a first cavity; 512. an inclined hole; 52. a leaf plate; 521. a cavity II; 522. a circular hole; 53. a water inlet pipe; 54. a bump; 6. a ball; 61. a thread rope.
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 fig. 3, the flue gas desulfurization purification system of the present invention comprises a gas transmission device, a desulfurization tower, a slurry preparation device, a slurry transmission device and a slurry recovery device; the gas transmission device is used for transmitting the flue gas into the desulfurizing tower; the desulfurizing tower is used for desulfurizing flue gas in the reaction inside the desulfurizing tower; the pulping device is used for manufacturing alkaline limestone solution; the slurry conveying device is used for conveying an alkaline limestone solution into the desulfurizing tower to react with sulfur dioxide in the flue gas; the slurry recovery device is used for recovering and treating alkaline limestone solution after reaction with sulfur dioxide in the desulfurizing tower;
the desulfurizing tower comprises a tower body 1, a slurry pool 2, a spray pipe 3, a demisting plate 4 and a controller; the side wall of the tower body 1 is provided with an air inlet 11, and the upper end of the tower body 1 is provided with an air outlet 12; the slurry pool 2 is positioned at the lower end of the tower body 1, and the slurry pool 2 is fixedly connected with the inner wall of the tower body 1; a liquid outlet 13 is formed in the outer wall of the tower body 1; the liquid outlets 13 are communicated with the slurry pool 2, and one end of the liquid outlet 13, which is far away from the slurry pool 2, is connected with a slurry recovery device through a recovery pipe 131; the spray pipe 3 is fixedly connected with the inner wall of the tower body 1, and the spray pipe 3 is positioned above the air inlet 11; the demisting plate 4 is positioned above the spray pipe 3, and the demisting plate 4 is fixedly connected with the inner wall of the tower body 1; an installation frame 5 is arranged between the spray pipe 3 and the air inlet 11; a rotating rod 51 is rotatably arranged at the center of the mounting rack 5; the surface of the rotating rod 51 is fixedly connected with a blade 52; the blade plates 52 are in sliding contact with the inner wall of the tower body 1; the controller is used for controlling the automatic operation of the desulfurizing tower;
in the prior art, the spraying pipe 3 sprays alkaline limestone solution, so that the alkaline limestone solution flows downwards along the inner wall of the tower body 1, when flue gas is introduced, sulfur dioxide in the flue gas contacts and reacts with the alkaline limestone solution on the inner wall of the tower body 1, the inner wall of the tower body 1 is scaled, and a scaling layer on the inner wall of the tower body 1 is accumulated continuously, so that a scaling body generated when the scaling layer falls off is overlarge, and a large scaling body falls into the slurry tank 2, thereby blocking the recovery pipe 131 and reducing the waste liquid recovery efficiency in the desulfurization tower, and the thickness of the scaling layer is increased, so that the air flow distribution in the tower body 1 is influenced, the flow velocity of the flue gas is accelerated, the contact time of the flue gas and the alkaline limestone solution is reduced, and the desulfurization effect of the desulfurization tower is reduced;
when the device works, the controller controls alkaline limestone solution to be sprayed out through the spray pipe 3, at the moment, the flue gas enters the tower body 1 through the air inlet 11 and impacts the blade plate 52, the blade plate 52 drives the rotating rod 51 to rotate under the pushing of the flue gas, the alkaline limestone solution sprayed out from the spray pipe 3 reacts with sulfur dioxide in the rising flue gas, so that the sulfur dioxide in the flue gas is absorbed, the flue gas without the sulfur dioxide continuously rises and passes through the demisting plate 4 to remove water mist contained in the flue gas, then the flue gas is discharged from the air outlet 12 at the upper end of the desulfurization tower, when the alkaline limestone solution sprayed out from the spray pipe 3 close to the inner wall of the tower body 1 flows down along the inner wall of the tower body 1 and reacts with the sulfur dioxide in the flue gas to be condensed into scale, in the rotating process of the blade plate 52, one end of the blade plate 52 far away from the rotating rod 51 can scrape scale particles on the inner wall of the tower body 1, so that the scale particles condensed on the inner wall of the tower body 1 fall off under the scraping action of the blade plate 52, the fallen scaling particles enter the slurry pool 2, and the fallen scaling particles enter the recovery pipe 131 along with the slurry from the liquid outlet 13 for recovery treatment, so that the accumulation of scaling on the inner wall of the tower body 1 is avoided;
according to the invention, through the arrangement of the blade plates 52, the blade plates 52 scrape the inner wall of the tower body 1 under the blowing of the flue gas, so that scaling particles on the inner wall of the tower body 1 drop under the scraping of the blade plates 52, the accumulation of scaling on the inner wall of the tower body 1 is avoided, on one hand, the situation that a scaling body generated when a scaling layer drops is too large to block a pipeline for recovering slurry is prevented, on the other hand, the blade plates 52 play a guiding role on the flue gas, when the inner wall of the tower body 1 is scaled too much, the scaling blocking and scraping speed of the blade plates 52 is reduced, the flue gas flow speed at the blade plates 52 is reduced, the contact time between the flue gas and an alkaline limestone solution is increased, the desulfurization effect of the alkaline limestone solution on the flue gas is enhanced, and the desulfurization effect of the desulfurization tower is improved.
As an embodiment of the present invention, a first cavity 511 is formed inside the rotating rod 51; a second cavity 521 is formed in the blade plate 52, and a circular hole 522 is formed in the windward side of the blade plate 52; the round hole 522 is communicated with the second cavity 521; the first cavity 511 is communicated with the second cavity 521; the upper end of the mounting frame 5 is provided with a water inlet pipe 53; the water inlet pipe 53 penetrates through the mounting frame 5 to be communicated with the first cavity 511, and the water inlet pipe 53 is rotatably connected with the rotating rod 51; when the device works, the controller controls the alkaline limestone solution to be introduced through the water inlet pipe 53 and enter the first cavity 511, so that the alkaline limestone solution enters the second cavity 521 through the first cavity 511 and flows out of the circular hole 522 in the second cavity 521, the alkaline limestone solution can generate reverse driving force on the blade plate 52, the rotation of the blade plate 52 is accelerated, the scraping effect of the blade plate 52 on the inner wall of the tower body 1 is improved, when the blade plate 52 scrapes the inner wall of the tower body 1, the alkaline limestone solution sprayed from the circular hole 522 close to the inner wall of the tower body 1 can wash the scraped inner wall of the tower body 1, so that scaling particles adhered to the inner wall of the tower body 1 and not falling off can quickly fall off under the washing of the alkaline limestone solution, the scaling effect of the blade plate 52 on the inner wall of the tower body 1 is improved, when the blade plate 52 rotates to the position of the air inlet 11, sulfur dioxide in flue gas can firstly contact and react with the alkaline limestone solution sprayed from the circular hole 522, when high-concentration sulfur dioxide is treated, the alkaline limestone solution plays a role in multiple desulfurization on the flue gas, so that the purification effect of the sulfur dioxide in the flue gas is improved; according to the invention, through the arrangement of the round hole 522, the alkaline limestone solution introduced into the water inlet pipe 53 is sprayed out through the round hole 522, so that on one hand, the rotating speed of the blade plate 52 is increased, the scraping effect of the blade plate 52 on the inner wall of the tower body 1 is improved, on the other hand, the scale particles which are scraped by the blade plate 52 and still adhered to the inner wall of the tower body 1 on the inner wall of the tower body 1 can be impacted, the falling of the scale particles is accelerated, and the actual application effect of the invention is further improved.
As an embodiment of the invention, the leeward side of the blade 52 is fixedly connected with a conical bump 54; the tip of the lug 54 is in sliding contact with the inner wall of the tower body 1; when the device works, in the rotating process of the blade plates 52, the convex blocks 54 positioned on the leeward side of the blade plates 52 synchronously rotate along with the blade plates 52, when the hardness of the scale formation layer on the inner wall of the tower body 1 is higher, the tips of the convex blocks 54 can be firstly contacted with the scale formation on the inner wall of the tower body 1, so that the scale formation layer on the inner wall of the tower body 1 is broken under the impact of the tips of the convex blocks 54, the blade plates 52 can scrape the scale formation on the inner wall of the tower body 1 conveniently, the blade plates 52 are prevented from being blocked by the hard scale formation layer, the blade plates 52 are prevented from being directly clamped, and the falling of the scale formation on the inner wall of the tower body 1 is accelerated; according to the invention, through the arrangement of the bump 54, the tip of the bump 54 can cut and crack a hard scaling layer, so that the abrasion degree of the blade plate 52 by the scaling layer is reduced, the strength of the blade plate 52 is improved, the service life and the use effect of the blade plate 52 are improved, and the actual application effect of the invention is effectively improved.
As an embodiment of the invention, the cross-sectional shape of the louver 52 is L-shaped, the vertical surface of the louver 52 is perpendicular to the bottom surface of the tower body 1, and the angle between the vertical surface of the louver 52 and the inclined surface of the louver 52 is 150-170 degrees; when the tower works, when the flue gas is introduced through the air inlet 11, the flue gas blows to the blades 52, so that the flue gas flows downwards along the inclined surfaces of the blades 52, the flue gas is blocked by the blades 52 and is gathered below the blades 52, the rising speed of the flue gas is reduced due to the rising state of the flue gas in the tower body 1 and the blocking of the inclined surfaces of the blades 52, the contact time of the flue gas and the alkaline limestone solution is increased, the flue gas gathered below the blades 52 is contacted with the alkaline limestone solution sprayed from the windward surfaces of the blades 52, the sulfur dioxide purification effect in the flue gas is improved, and the flue gas rises, so that the flue gas generates an upward inclined driving force on the blades 52, and the rotating speed of the blades 52 is accelerated; the scraping effect of the blade plates 52 is improved; according to the invention, the blade plates 52 are arranged in an L shape, so that on one hand, the flow guiding effect is exerted on the flue gas, the rising speed of the flue gas is reduced, the contact time of the flue gas and the alkaline limestone solution is prolonged, the purification effect of sulfur dioxide in the flue gas is improved, on the other hand, the flue gas is positioned below the blade plates 52, the flue gas generates an upward inclined pushing force on the blade plates 52, and the rotating speed of the blade plates 52 is accelerated; the angle between the vertical surface and the inclined surface of the blade plate 52 is 150-170 degrees, so that the smoke can be guaranteed to have strong blowing force on the inclined surface of the blade plate 52, and the blade plate 52 can guide the smoke.
As an embodiment of the present invention, the surface of the rotating rod 51 is provided with an inclined hole 512; the inclined hole 512 is communicated with the first cavity 511, and the inclined hole 512 faces the leeward side of the blade plate 52; the round hole 522 on the inclined surface of the blade plate 52 is parallel to the bottom surface of the tower body 1; the round hole 522 is communicated with the cavity No. two 521, and the number of the round holes 522 is increased along with the distance from the rotating rod 51; when the device works, when alkaline limestone solution is filled into the rotating rod 51, the alkaline limestone solution is sprayed out through the inclined holes 512 on the surface of the rotating rod 51, so that the alkaline limestone solution is sprayed to the lee surface of the blade plate 52, the lee surface of the blade plate 52 is scraped by the blade plate 52, scales adhered to the surface of the blade plate 52 fall off under the impact of the alkaline limestone solution, the alkaline limestone solution continuously impacts the scraping surfaces of the lug 54 and the blade plate 52, the alkaline limestone solution cools the tip of the lug 54 and the scraping surfaces of the blade plate 52, the service lives of the tip of the lug 54 and the scraping surfaces of the blade plate 52 are prolonged, the quantity of the circular holes 522 is continuously increased along with the fact that the blade plate 52 is continuously close to the inner wall of the tower body 1, the water yield at the edge of the blade plate 52 is increased, the reverse driving force of the water flow at the edge of the blade plate 52 is continuously increased, and the rotating speed of the water flow sprayed out from the circular holes 522 to drive the blade plate 52 is increased, the scraping effect of the blade plates 52 on the scale on the inner wall of the tower body 1 is improved, and the practical application effect of the invention is improved.
As an embodiment of the present invention, a round ball 6 is arranged below the louver 52; the round ball 6 is fixedly connected with the blade plate 52 through a wire rope 61; when the anti-corrosion device works, in the rotating process of the leaf plate 52, the leaf plate 52 pulls the round ball 6 through the wire rope 61 to rotate, and the wire rope 61 is made of glass fiber materials, so that the corrosion resistance of the wire rope 61 is enhanced; in the process of rotation of the blade plates 52, the blade plates 52 scrape the scale on the inner wall of the tower body 1, so that the blade plates 52 pushed by the airflow generate speed difference to cause centrifugal force change, thereby causing the sphere 6 to swing, and causing the sphere 6 to impact the scale on the inner wall of the tower body 1, in the process of rotation of the sphere 6, the sphere 6 is in contact with the inner wall of the tower body 1 under the action of the centrifugal force and frequently impacting the inner wall of the tower body 1, so that a hard scale layer on the inner wall of the tower body 1 is loosened under the impact of the sphere 6, the bump 54 on the leeward side of the blade plates 52 on the rear side impacts the loosened hard scale layer and breaks the hard scale layer, the falling of the scale layer on the inner wall of the tower body 1 is accelerated, and the practical application effect of the invention is further improved.
The specific working process is as follows:
the controller controls alkaline limestone solution to be sprayed out through the spray pipe 3, at the moment, the flue gas enters the tower body 1 through the air inlet 11 and impacts the blade plates 52, the blade plates 52 drive the rotating rod 51 to rotate under the pushing of the flue gas, the alkaline limestone solution sprayed out through the spray pipe 3 reacts with sulfur dioxide in the rising flue gas, so that the sulfur dioxide in the flue gas is absorbed, the flue gas without the sulfur dioxide continuously rises and passes through the demisting plates 4 to remove water mist contained in the flue gas, then the flue gas is discharged from the air outlet 12 at the upper end of the desulfurization tower, when the alkaline limestone solution sprayed out from the spray pipe 3 close to the inner wall of the tower body 1 flows downwards along the inner wall of the tower body 1 and reacts with the sulfur dioxide in the flue gas to be condensed into scales, in the rotating process of the blade plates 52, one end of the blade plate 52 far away from the rotating rod 51 can scrape the scale particles on the inner wall of the tower body 1, so that the scale particles condensed on the inner wall of the tower body 1 fall off under the scraping action of the blade plates 52, the fallen scaling particles enter the slurry pool 2, and the fallen scaling particles enter the recovery pipe 131 along with the slurry from the liquid outlet 13 for recovery treatment, so that the accumulation of scaling on the inner wall of the tower body 1 is avoided; the controller controls the alkaline limestone solution to be introduced through the water inlet pipe 53 and enter the first cavity 511, so that the alkaline limestone solution enters the second cavity 521 through the first cavity 511 and flows out of the circular hole 522 in the second cavity 521, the alkaline limestone solution can generate reverse driving force on the blade 52, the rotation of the blade 52 is accelerated, the scraping effect of the blade 52 on the inner wall of the tower body 1 is improved, when the blade 52 scrapes the inner wall of the tower body 1, the alkaline limestone solution sprayed from the circular hole 522 close to the inner wall of the tower body 1 can wash the scraped inner wall of the tower body 1, so that the scaling particles adhered to the inner wall of the tower body 1 and not falling off can quickly fall off under the washing of the alkaline limestone solution, the scaling cleaning effect of the blade 52 on the inner wall of the tower body 1 is improved, when the blade 52 rotates to the position of the air inlet 11, sulfur dioxide in the flue gas can firstly contact and react with the alkaline limestone solution sprayed from the circular hole 522, and when high-concentration sulfur dioxide is treated, the alkaline limestone solution plays a role in multiple desulfurization on the flue gas, and the purification effect of sulfur dioxide in the flue gas is improved.
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 described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A flue gas desulfurization purification system comprises a gas transmission device, a desulfurization tower, a pulping device, a slurry transmission device and a slurry recovery device; the gas transmission device is used for transmitting the flue gas into the desulfurizing tower; the desulfurizing tower is used for desulfurizing flue gas in the reaction inside the desulfurizing tower; the pulping device is used for manufacturing alkaline limestone solution; the slurry conveying device is used for conveying an alkaline limestone solution into the desulfurizing tower to react with sulfur dioxide in the flue gas; the slurry recovery device is used for recovering and treating alkaline limestone solution after reaction with sulfur dioxide in the desulfurizing tower;
the method is characterized in that: the desulfurizing tower comprises a tower body (1), a slurry pool (2), a spray pipe (3), a demisting plate (4) and a controller; the side wall of the tower body (1) is provided with an air inlet (11), and the upper end of the tower body (1) is provided with an air outlet (12); the slurry pool (2) is positioned at the lower end of the tower body (1), and the slurry pool (2) is fixedly connected with the inner wall of the tower body (1); a liquid outlet (13) is formed in the outer wall of the tower body (1); the liquid outlets (13) are communicated with the slurry pool (2), and one end of the liquid outlet (13) far away from the slurry pool (2) is connected with a slurry recovery device through a recovery pipe (131); the spray pipe (3) is fixedly connected with the inner wall of the tower body (1), and the spray pipe (3) is positioned above the air inlet (11); the demisting plate (4) is positioned above the spray pipe (3), and the demisting plate (4) is fixedly connected with the inner wall of the tower body (1); a mounting rack (5) is arranged between the spray pipe (3) and the air inlet (11); a rotating rod (51) is rotatably arranged at the center of the mounting rack (5); the surface of the rotating rod (51) is fixedly connected with a blade plate (52); the blade plates (52) are in sliding contact with the inner wall of the tower body (1); the controller is used for controlling the automatic operation of the desulfurizing tower.
2. The flue gas desulfurization purification system according to claim 1, wherein: a first cavity (511) is formed in the rotating rod (51); a second cavity (521) is formed in the blade plate (52), and a circular hole (522) is formed in the windward side of the blade plate (52); the round hole (522) is communicated with a second cavity (521); the first cavity (511) is communicated with the second cavity (521); a water inlet pipe (53) is arranged at the upper end of the mounting rack (5); the water inlet pipe (53) penetrates through the mounting frame (5) to be communicated with the first cavity (511), and the water inlet pipe (53) is rotatably connected with the rotating rod (51).
3. The flue gas desulfurization purification system according to claim 2, wherein: the leeward side of the blade plate (52) is fixedly connected with a conical bump (54); the tip of the lug (54) is in sliding contact with the inner wall of the tower body (1).
4. The flue gas desulfurization purification system according to claim 3, wherein: the cross section of the blade plate (52) is L-shaped, the vertical surface of the blade plate (52) is perpendicular to the bottom surface of the tower body (1), and the angle between the vertical surface of the blade plate (52) and the inclined surface of the blade plate (52) is 150 degrees and 170 degrees.
5. The flue gas desulfurization purification system according to claim 4, wherein: the surface of the rotating rod (51) is provided with an inclined hole (512); the inclined hole (512) is communicated with the first cavity (511), and the inclined hole (512) faces to the leeward side of the blade plate (52); the round hole (522) on the inclined plane of the blade plate (52) is parallel to the ground; the round hole (522) is communicated with the second cavity (521), the round hole (522) is far away from the rotating rod (51), and the number of the round hole (522) is increased continuously.
6. The flue gas desulfurization purification system according to claim 5, wherein: a round ball (6) is arranged below the blade plate (52); the round ball (6) is fixedly connected with the blade plate (52) through a wire rope (61).
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| CN202111015045.2A CN113617198A (en) | 2021-08-31 | 2021-08-31 | Flue gas desulfurization and purification system |
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| CN202111015045.2A CN113617198A (en) | 2021-08-31 | 2021-08-31 | Flue gas desulfurization and purification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117815684A (en) * | 2024-03-04 | 2024-04-05 | 湖南弘润化工科技有限公司 | Solution concentration equipment is used in preparation of high purity benzoic acid |
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