CN113750746A - Tail gas purification processing system of dichlorophenol production - Google Patents
Tail gas purification processing system of dichlorophenol production Download PDFInfo
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- CN113750746A CN113750746A CN202111107782.5A CN202111107782A CN113750746A CN 113750746 A CN113750746 A CN 113750746A CN 202111107782 A CN202111107782 A CN 202111107782A CN 113750746 A CN113750746 A CN 113750746A
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- absorption
- scraper
- wall
- scale
- tube array
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- UMPSXRYVXUPCOS-UHFFFAOYSA-N 2,3-dichlorophenol Chemical compound OC1=CC=CC(Cl)=C1Cl UMPSXRYVXUPCOS-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000746 purification Methods 0.000 title claims abstract description 8
- 238000010521 absorption reaction Methods 0.000 claims abstract description 229
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 239000011552 falling film Substances 0.000 claims abstract description 30
- 239000006096 absorbing agent Substances 0.000 claims abstract description 29
- 239000006210 lotion Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 70
- 230000000670 limiting effect Effects 0.000 claims description 30
- 239000004744 fabric Substances 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 64
- 239000000498 cooling water Substances 0.000 abstract description 35
- 230000000694 effects Effects 0.000 abstract description 32
- 230000002035 prolonged effect Effects 0.000 description 10
- 238000007790 scraping Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- VYQRBKCKQCRYEE-UHFFFAOYSA-N ctk1a7239 Chemical compound C12=CC=CC=C2N2CC=CC3=NC=CC1=C32 VYQRBKCKQCRYEE-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/08—Non-rotary, e.g. reciprocated, appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention belongs to the technical field of tail gas treatment, and particularly relates to a tail gas purification treatment system for dichlorophenol production, which comprises a falling film absorber, wherein the falling film absorber further comprises a tube body, an absorption tube array and a controller; the inner wall of the tube body is fixedly provided with an upper mounting plate and a lower mounting plate, and the mounting plates are used for fixing the absorption tubes; one end of the pipe body is provided with an air inlet, the other end of the pipe body is provided with a liquid outlet, and the outer wall of the pipe body is sequentially provided with a lotion opening, a water inlet, a water outlet and an air outlet between the air inlet and the liquid outlet; according to the invention, by arranging the scraper, the scraper can scrape off the scale condensed on the outer wall of the absorption tube array, so that the scale is prevented from being accumulated on the outer wall of the absorption tube array, and on one hand, the cooling water is reduced to absorb the heat transferred by the absorption tube array, thereby avoiding the temperature rise in the absorption tube array, improving the absorption effect of the absorption liquid on the hydrochloric acid tail gas, and on the other hand, the scraper is convenient for workers to clean the scale in the absorption tube array, and reducing the labor intensity of the workers.
Description
Technical Field
The invention belongs to the technical field of tail gas treatment, and particularly relates to a tail gas purification treatment system for dichlorophenol production.
Background
Dichlorophenol is mainly used for synthesizing pesticide, and is produced through pumping quantitative phenol into chlorination reactor, heating liquid chlorine with hot water to gasify, introducing the gasified liquid chlorine into the reactor through flow meter control, controlling reaction temperature to chloridize to obtain dichlorophenol, low temperature condensation and scrubbing to trap phenol, separation and recovery in rectifier, absorption of hydrochloric acid in the residual tail gas in multistage falling film absorber, and absorption and purification of the residual tail gas in packed tower.
For example, a chinese patent with application number CN201220542985.7 discloses a falling film absorber, which is characterized in that a cooling water inlet and a cooling water outlet are provided, so that a large amount of heat generated during the absorption of the absorption liquid falling film is transferred to the outside through the tube wall of the absorption tube array, and the cooling water flows from the cooling water inlet to the cooling water outlet in the inner cavity of the absorption section from bottom to top, taking away the heat on the outer wall of the absorption tube array, thereby achieving the advantages of good cooling effect of the falling film absorber, good film forming property and absorption effect of the absorption liquid, and the device is not easy to damage, and long service life of the falling film absorber; but this technical scheme does not solve completely and absorbs the tubulation in the falling film absorber and when hydrochloric acid tail gas absorption, hydrochloric acid is exothermic at the absorption tubulation inner wall, the heat of its production is transmitted by the absorption tubulation, make the cooling water at the in-process to absorbing the tubulation refrigerated, incrustation scale in the cooling water can condense the outer wall at the absorption tubulation, make absorption tubulation heat transfer effect weaken, thereby make the temperature rise in the absorption tubulation, the absorption effect of absorption liquid to hydrochloric acid tail gas weakens, and the incrustation scale condenses at the absorption tubulation outer wall, make the staff to the clearance degree of difficulty increase of incrustation scale, make staff's intensity of labour strengthen, 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 system for purifying and treating exhaust gas from dichlorophenol production, which solves the above technical problems.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides a tail gas purification treatment system for dichlorophenol production, which is characterized in that a scraper is arranged, so that the scraper can scrape scale condensed on the outer wall of an absorption tube array, the scale is prevented from being accumulated on the outer wall of the absorption tube array, on one hand, cooling water is reduced to absorb heat transferred by the absorption tube array, so that the temperature rise in the absorption tube array is avoided, the absorption effect of absorption liquid on hydrochloric acid tail gas is improved, on the other hand, workers can conveniently clean the scale in the absorption tube array, and the labor intensity of the workers is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: the tail gas purification treatment system for dichlorophenol production comprises a falling film absorber, wherein the falling film absorber further comprises a tube body, an absorption tube array and a controller; the inner wall of the tube body is fixedly provided with an upper mounting plate and a lower mounting plate, and the mounting plates are used for fixing the absorption tubes; one end of the pipe body is provided with an air inlet, the other end of the pipe body is provided with a liquid outlet, and the outer wall of the pipe body is sequentially provided with a lotion opening, a water inlet, a water outlet and an air outlet between the air inlet and the liquid outlet; the water inlet is communicated with the water outlet; the washing liquid port is positioned between the air inlet and the absorption tube array; a gear is rotatably connected to the mounting plate below the pipe body, a screw rod is rotatably and hermetically connected to the inner wall of the pipe body, and the screw rod is meshed with the gear; the outer wall of the pipe body is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with one end of the screw rod; the center of the gear is fixedly connected with a screw, the gear is provided with a scraper, the scraper is in threaded transmission connection with the screw, and a through hole is formed in the scraper; the absorption tube arrays are connected in the through holes in a sliding and sealing manner; the controller is used for controlling the whole falling film absorber to automatically operate;
in the prior art, when an absorption tube in a falling film absorber absorbs tail gas of hydrochloric acid, the hydrochloric acid releases heat, so that the generated heat is transferred by the absorption tube, scale in cooling water can be condensed on the outer wall of the absorption tube in the process of cooling the absorption tube, the heat transfer effect of the absorption tube is weakened, the temperature in the absorption tube is increased, the absorption effect of absorption liquid on the tail gas of hydrochloric acid is weakened, and the scale is condensed on the outer wall of the absorption tube, so that the difficulty in cleaning the scale by workers is increased, and the labor intensity of the workers is strengthened;
when the device works, a worker controls absorption liquid to enter from a washing liquid port through a controller, so that the absorption liquid flows over ports of the absorption tubes and flows down along the inner walls of the absorption tubes, hydrochloric acid tail gas is controlled to enter the tube body from an air inlet, the hydrochloric acid tail gas enters the absorption tubes and is absorbed by the absorption liquid on the inner walls of the absorption tubes, the hydrochloric acid tail gas releases heat on the inner walls of the absorption tubes, the controller controls cooling water to enter from a water inlet and fill between the two mounting plates, so that the absorption tubes are cooled by the cooling water, when the cooling water is filled between the two mounting plates, a water outlet is opened, the cooling water flows out from the water outlet, so that water flow between the two mounting plates is kept at a constant speed, when the absorption liquid flows out from the lower ends of the absorption tubes, the absorption liquid with the hydrochloric acid in the absorption liquid is discharged from a liquid discharge port, the hydrochloric acid tail gas which is not absorbed is discharged from an air outlet and is subjected to next treatment, the absorption liquid in the absorption tube array absorbs the hydrochloric acid tail gas, the outer wall of the absorption tube array continuously condenses scale, when the scale on the outer wall of the absorption tube array needs to be cleaned, a worker controls the falling film absorber to stop through the controller, so that cooling water completely flows out from the water outlet, the controller controls the driving motor to rotate at the moment, the driving motor drives the gear and the screw to synchronously rotate through the screw rod, the scraper blade slides upwards along the inner wall of the tube body, the scraper blade slides upwards along the absorption tube array, the scale on the outer wall of the absorption tube array is separated from the outer wall of the absorption tube array under the scraping action of the side wall of the through hole, when the scraper blade is contacted with the mounting plate above, the controller controls the driving motor to reversely rotate, the driving motor drives the gear and the screw to reversely rotate, the scraper blade is reset, the controller controls the falling film absorber to operate at the moment, so that the cooling water enters from the water inlet, so that the scale above the scraper plate flows out from the water outlet along with the cooling water;
according to the invention, by arranging the scraper, the scraper can scrape off the scale condensed on the outer wall of the absorption tube array, so that the scale is prevented from being accumulated on the outer wall of the absorption tube array, and on one hand, the cooling water is reduced to absorb the heat transferred by the absorption tube array, thereby avoiding the temperature rise in the absorption tube array, improving the absorption effect of the absorption liquid on the hydrochloric acid tail gas, and on the other hand, the scraper is convenient for workers to clean the scale in the absorption tube array, and reducing the labor intensity of the workers.
Preferably, a sealing bearing is fixedly arranged in the through hole; the outer wall of the absorption tube array is provided with a spiral groove; the inner ring of the sealed bearing is fixedly connected with a sliding block; the sliding block is connected with the spiral groove in a sliding and sealing mode; when the scraper blade moves upwards, the sealing bearing in the scraper blade moves upwards under the driving of the scraper blade, so that the sealing bearing drives the sliding block to slide along the spiral groove, the sealing bearing drives the sliding block to rotate upwards along the spiral groove, the sealing bearing rotationally scrapes scale on the outer wall of the absorption tube array, and the sliding block can scrape off the scale condensed in the sliding groove in the sliding process along the spiral groove; the sealing bearing can drive water flow at the position of the sealing bearing to rotate, so that the water flow above the sealing bearing rotates, the water flow impacts scale cut by the sealing bearing, the separation of the scale from the outer wall of the absorption tube array is accelerated, the sealing bearing rotates, the water flow drives the scale scraped at the upper end of the sealing bearing to rotate, the scraped scale is far away from the absorption tube array under the centrifugal rotation of the water flow, the phenomenon that the scale is too high to be accumulated on the sealing bearing is avoided, the sealing bearing cannot scrape the scale on the outer wall of the absorption tube array above under the blocking of the scale is prevented, the integral cleaning effect of the scraper on the absorption tube array is improved, and the actual application effect of the invention is improved.
Preferably, a brush plate is arranged above the sealing bearing; the lower end of the brush plate is provided with an arc chute and a groove; the arc chute is communicated with the groove; a sliding block is connected in the arc chute in a sliding manner; the sliding block is fixedly connected with the sealing bearing; the side wall of the groove is fixedly connected with a supporting spring, and the bottom of the groove is fixedly connected with a compression spring; one end of the supporting spring, which is close to the sliding block, is fixedly connected with a pushing plate; the pushing plate is in sliding contact with the sliding block; when the sealing device works, when the sealing bearing rotates, the brush plate rotates synchronously under the driving of the sealing bearing, so that the brush plate can push water flow to rotate, the water flow flows towards the same direction, the rotating effect of the water flow is increased, the scouring effect on scale on the surface of the absorption tube array is improved, the falling of the scale is accelerated, along with the rotation of the brush plate, one end of the brush plate close to the absorption tube array can scrape the scale on the surface of the absorption tube array firstly, the scale which is condensed on the outer wall of the absorption tube array and is thicker on the outer wall of the absorption tube array falls off through the scraping of the brush plate, the thickness of the scale is reduced, the scale with the reduced thickness is scraped off by the sealing bearing, the scraping effect of the sealing bearing on the scale on the outer wall of the absorption tube array is improved, when the brush plate rises under the driving of the scraping plate and is in contact with the mounting plate, the brush plate is extruded and falls by the mounting plate, and the sliding block slides along the arc surface of the arc chute, the sliding block is enabled to compress the supporting spring to slide towards the groove direction through the pushing plate, when the sliding block slides to the notch of the groove, one end, close to the absorption tube, of the brush plate is abutted against the absorption tube, the sliding block continuously rotates and rises along with the sealing bearing, the sealing bearing pushes the sliding block to extrude the compression spring to enter the groove, and meanwhile, the sliding block drives the brush plate to rotate along the outer wall of the absorption tube, so that scale at the upper end of the absorption tube is scraped off by the brush plate, and scale condensed on the outer wall of the absorption tube is greatly reduced; according to the invention, through the arrangement of the brush plate, the brush plate can thin the scale coagulated on the outer wall of the absorption tube array, the seal bearing can clean the scale coagulated on the outer wall of the absorption tube array conveniently, the cleaning effect of the seal bearing on the scale is improved, the area of rotary cutting between the seal bearing and the scale is reduced, the abrasion of the seal bearing is reduced, the service life of the seal bearing is prolonged, and the brush plate is matched with the sliding block, so that the brush plate can scrape the scale on the surface of the absorption tube array close to the upper mounting plate, the content of the scale coagulated on the surface of the absorption tube array is reduced, and the practicability of the invention is improved.
Preferably, a round hole is formed in the upper end of the scraper, a filter screen is fixedly mounted at one end, away from the liquid outlet, of the round hole, and filter cloth is fixedly connected onto the filter screen; when the device works, when scale on the inner wall of the absorption array pipe needs to be cleaned, the falling film absorber does not need to be closed, at the moment, a worker directly controls the driving motor to drive the driving motor to rotate through the controller, so that the scraper blade is driven by the driving motor to ascend, at the moment, condensed water above the scraper blade flows to a position between the lower mounting plate and the scraper blade through the circular hole and flows out of the water outlet, and at the moment, the condensed water between the two mounting plates is in a balanced flowing state; the heat generated by the friction between the screw rod and the gear soaked in the condensed water is absorbed by the condensed water, the generation of the friction heat between the screw rod and the gear is reduced, the abrasion between the screw rod and the gear is reduced, thereby prolonging the service life of the screw rod and the gear, preventing scale scraped off by the scraper from entering between the lower mounting plate and the scraper through the round hole due to the arrangement of the filter cloth, avoiding the scale from sinking to the meshing part of the screw rod and the gear and damaging the screw rod and the gear which are driven, supporting the filter cloth by the filter cloth due to the arrangement of the filter cloth, and prolonging the service life of the filter cloth, the scale generation speed is slow, no obvious scale condensation is generated on the surface of the absorption tube only in the short time of the ascending and descending of the scraper, therefore, when the scraper plate descends, no scale on the surface of the absorption tube array is scraped off by the scraper plate, and no scale is left between the lower mounting plate and the scraper plate.
Preferably, the inner wall of the shell is provided with a sliding chute; a limiting block is connected in the sliding groove in a sliding and sealing manner; the limiting block is fixedly connected with the scraper; when the falling film absorber works, the absorbing tubes used by different falling film absorbers are different in material, so that the absorbing tubes are different in firmness, when the driving motor rotates through the lead screw driving gear, the gear drives the screw rod to rotate, the screw rod drives the scraper to generate a rotation trend, the scraper drives the limiting block to generate a rotation trend, but the limiting block is limited in the sliding groove and cannot rotate, and the limiting block drives the scraper to slide upwards along the sliding groove; when the scraper generates a rotation trend, the scraper is only supported by the absorption array tubes, so that the scraper cannot rotate and rise, when the absorption array tubes are used for a long time, the outer walls of the absorption array tubes are corroded by water scale, the strength of the positions of the absorption array tubes is weakened, and when the scraper moves to the corroded area of the absorption array tubes, the absorption array tubes cannot bear the torsion of the scraper and are damaged; the limiting block is matched with the sliding groove, so that the limiting block can limit the scraper, the scraper is prevented from rotating, the absorption tubes are prevented from being damaged by torsion, the service life of the absorption tubes is prolonged, the scraper can be used for the absorption tubes made of various materials, the application range of the scraper is widened, and the actual use effect of the invention is effectively improved.
Preferably, an air passage is formed in the tube body; one end of the air passage is communicated with the water inlet, and the other end of the air passage is communicated with the sliding chute; when the device works, when the scraper plate rises and scrapes scales on the surface of the absorption tube, the scales scraped by the scraper plate are flatly paved at the upper end of the scraper plate under the driving of the brush plate, so that part of the scales can enter the chute and are accumulated on the limiting block, and because part of condensed water flows into the air passage in the process of entering the condensed water from the water inlet, the condensed water in the air passage is sprayed out from the chute, and when the limiting block moves to the air passage, the accumulated scales on the limiting block can be dispersed by the condensed water sprayed out of the air passage, so that no scales are left on the limiting block, and the actual application effect of the device is further improved.
The invention has the following beneficial effects:
1. according to the invention, by arranging the scraper, the scraper can scrape off the scale condensed on the outer wall of the absorption tube array, so that the scale is prevented from being accumulated on the outer wall of the absorption tube array, and on one hand, the cooling water is reduced to absorb the heat transferred by the absorption tube array, thereby avoiding the temperature rise in the absorption tube array, improving the absorption effect of the absorption liquid on the hydrochloric acid tail gas, and on the other hand, the scraper is convenient for workers to clean the scale in the absorption tube array, and reducing the labor intensity of the workers.
2. According to the invention, through the arrangement of the brush plate, the brush plate can thin the scale coagulated on the outer wall of the absorption tube array, the seal bearing can clean the scale coagulated on the outer wall of the absorption tube array conveniently, the cleaning effect of the seal bearing on the scale is improved, the area of rotary cutting between the seal bearing and the scale is reduced, the abrasion of the seal bearing is reduced, the service life of the seal bearing is prolonged, and the brush plate is matched with the sliding block, so that the brush plate can scrape the scale on the surface of the absorption tube array close to the upper mounting plate, the content of the scale coagulated on the surface of the absorption tube array is reduced, and the practicability of the invention is improved.
3. The limiting block is matched with the sliding groove, so that the limiting block has a limiting effect on the scraper, the scraper is prevented from rotating, the absorption tubes are enabled to generate torsional force by the scraper, the absorption tubes are prevented from being damaged by the torsion of the scraper, the service life of the absorption tubes is prolonged, the scraper can be used for the absorption tubes made of various materials, the application range of the scraper is widened, and the actual using 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 a schematic structural view of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;
FIG. 5 is an enlarged view at C in FIG. 2;
FIG. 6 is an enlarged view at D of FIG. 2;
FIG. 7 is a cross-sectional view taken at E-E of FIG. 2;
FIG. 8 is a schematic view of a brush plate according to the present invention;
in the figure: 1. a pipe body; 11. an air inlet; 12. a liquid discharge port; 13. a washing liquid port; 14. a water inlet; 15. a water outlet; 16. an exhaust port; 17. a chute; 18. an airway; 2. an absorption array pipe; 21. a helical groove; 3. mounting a plate; 31. a gear; 32. a screw rod; 33. a drive motor; 34. a screw; 35. a squeegee; 351. a through hole; 352. a circular hole; 353. filtering with a screen; 354. filtering cloth; 36. sealing the bearing; 361. a slider; 37. a limiting block; 4. brushing the board; 41. an arc chute; 42. a groove; 43. a slider; 44. a compression spring; 45. a support spring; 46. and pushing the plate.
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 8, the system for purifying and treating the tail gas from the production of dichlorophenol according to the present invention includes a falling film absorber, wherein the falling film absorber further includes a pipe body 1, an absorption column 2 and a controller; an upper mounting plate 3 and a lower mounting plate 3 are fixedly mounted on the inner wall of the tube body 1, and the mounting plates 3 are used for fixing the absorption tubes 2; one end of the pipe body 1 is provided with an air inlet 11, the other end of the pipe body is provided with a liquid outlet 12, and the outer wall of the pipe body 1 is sequentially provided with a lotion outlet 13, a water inlet 14, a water outlet 15 and an air outlet 16 between the air inlet 11 and the liquid outlet 12; the water inlet 14 is communicated with the water outlet 15; the liquid washing port 13 is positioned between the air inlet 11 and the absorption tube array 2; a gear 31 is rotatably connected to the mounting plate 3 below the pipe body 1, a screw rod 32 is rotatably and hermetically connected to the inner wall of the pipe body 1, and the screw rod 32 is meshed with the gear 31; the outer wall of the pipe body 1 is fixedly connected with a driving motor 33, and the output end of the driving motor 33 is fixedly connected with one end of a screw rod 32; the center of the gear 31 is fixedly connected with a screw 34, the gear 31 is provided with a scraper 35, the scraper 35 is in threaded transmission connection with the screw 34, and a through hole 351 is formed in the scraper 35; the absorption array pipe 2 is connected in the through hole 351 in a sliding and sealing mode; the controller is used for controlling the whole falling film absorber to automatically operate;
in the prior art, when the absorption tubes 2 in the falling film absorber absorb the hydrochloric acid tail gas, the hydrochloric acid releases heat, so that the generated heat is transferred by the absorption tubes 2, and scale in the cooling water can be condensed on the outer walls of the absorption tubes 2 in the process of cooling the absorption tubes 2, so that the heat transfer effect of the absorption tubes 2 is weakened, the temperature in the absorption tubes 2 is increased, the absorption effect of the absorption liquid on the hydrochloric acid tail gas is weakened, and the scale is condensed on the outer walls of the absorption tubes 2, so that the difficulty in cleaning the scale by workers is increased, and the labor intensity of the workers is strengthened;
when the device works, a worker controls absorption liquid to enter from the washing liquid port 13 through the controller, so that the absorption liquid flows over the port of the absorption tube array 2 and flows down along the inner wall of the absorption tube array 2, at the moment, hydrochloric acid tail gas is controlled to enter the tube body 1 from the air inlet 11, the hydrochloric acid tail gas enters the absorption tube array 2 and is absorbed by the absorption liquid on the inner wall of the absorption tube array 2, so that the hydrochloric acid tail gas releases heat on the inner wall of the absorption tube array 2, at the moment, the controller controls cooling water to enter from the water inlet 14 and fill between the two mounting plates 3, so that the cooling water cools the absorption tube array 2, when the cooling water fills between the two mounting plates 3, the water outlet 15 is opened, so that the cooling water flows out from the water outlet 15, the water flow between the two mounting plates 3 is kept at a constant speed, when the absorption liquid flows out from the lower end of the absorption tube array 2, the absorption liquid with the hydrochloric acid in the absorption liquid is discharged from the liquid outlet 12, hydrochloric acid tail gas which is not absorbed is discharged from the exhaust port 16 and is subjected to next treatment, the absorption liquid in the absorption tube array 2 absorbs the hydrochloric acid tail gas, scale is continuously condensed on the outer wall of the absorption tube array 2, when the scale on the outer wall of the absorption tube array 2 needs to be cleaned, a worker controls the falling film absorber to stop through the controller, so that cooling water completely flows out from the water outlet 15, at the moment, the controller controls the driving motor 33 to rotate, the driving motor 33 drives the gear 31 and the screw rod 34 to synchronously rotate through the screw rod 32, the scraper 35 slides upwards along the inner wall of the tube body 1, the scraper 35 slides upwards along the absorption tube array 2, the scale on the outer wall of the absorption tube array 2 is separated from the outer wall of the absorption tube array 2 under the scraping action of the side wall of the through hole 351, and when the scraper 35 is in contact with the mounting plate 3 above, the controller controls the driving motor 33 to rotate reversely, so that the driving motor 33 drives the gear 31 and the screw rod 34 to rotate reversely, the scraper 35 is reset, and at the moment, the controller controls the falling film absorber to operate, so that cooling water enters from the water inlet 14, and scale above the scraper 35 flows out from the water outlet 15 along with the cooling water;
according to the invention, by arranging the scraper 35, the scraper 35 can scrape off the scale condensed on the outer wall of the absorption tube array 2, so that the scale is prevented from being accumulated on the outer wall of the absorption tube array 2, and on one hand, the cooling water is reduced to absorb the heat transferred by the absorption tube array 2, thereby preventing the temperature in the absorption tube array 2 from being increased, improving the absorption effect of the absorption liquid on the hydrochloric acid tail gas, on the other hand, the scraper is convenient for workers to clean the scale in the absorption tube array 2, and the labor intensity of the workers is reduced.
As an embodiment of the present invention, a seal bearing 36 is fixedly installed in the through hole 351; the outer wall of the absorption tube array 2 is provided with a spiral groove 21; the inner ring of the sealed bearing 36 is fixedly connected with a sliding block 361; the sliding block 361 is connected with the spiral groove 21 in a sliding and sealing mode; in operation, when the scraper 35 moves upwards, the sealing bearing 36 in the scraper 35 moves upwards under the driving of the scraper 35, so that the sealing bearing 36 drives the sliding block 361 to slide along the spiral groove 21, so that the sealing bearing 36 drives the sliding block 361 to rotate upwards along the spiral groove 21, so that the sealing bearing 36 can rotationally scrape the scale on the outer wall of the absorption tube 2, and the slide block 361 can scrape the scale condensed in the chute 17 in the process that the slide block 361 slides along the spiral groove 21, when the sealing bearing 36 makes rotational friction to the hard scale condensed on the outer wall of the absorption tube 2, the hard scale is broken by the rotational friction of the sealing bearing 36, the sealing bearing 36 scrapes off the scale which is broken and adhered to the outer wall of the absorption tube array 2, so that the sealing bearing 36 is prevented from being damaged due to the impact of translational cutting between the sealing bearing 36 and the scale, and the service life of the sealing bearing 36 is prolonged; and the sealing bearing 36 rotates to drive the water flow at the position to rotate, so that the water flow above the sealing bearing 36 rotates, the water flow impacts the scale cut by the sealing bearing 36, the separation of the scale from the outer wall of the absorption tube array 2 is accelerated, the sealing bearing 36 rotates, the water flow drives the scale scraped from the upper end of the sealing bearing 36 to rotate, the scraped scale is far away from the absorption tube array 2 under the centrifugal rotation of the water flow, the scale is prevented from being excessively accumulated on the sealing bearing 36, the sealing bearing 36 is prevented from being incapable of scraping the scale on the outer wall of the absorption tube array 2 above under the blocking of the scale, the overall cleaning effect of the scraper 35 on the absorption tube array 2 is improved, and the actual application effect of the invention is improved.
As an embodiment of the present invention, a brush plate 4 is disposed above the sealing bearing 36; the lower end of the brush plate 4 is provided with an arc chute 41 and a groove 42; the arc chute 41 is communicated with the groove 42; a sliding block 43 is connected in the arc chute 41 in a sliding manner; the sliding block 43 is fixedly connected with the sealing bearing 36; the side wall of the groove 42 is fixedly connected with a support spring 45, and the bottom of the groove 42 is fixedly connected with a compression spring 44; one end of the supporting spring 45 close to the sliding block 43 is fixedly connected with a pushing plate 46; the push plate 46 is in sliding contact with the slide block 43; when the device works, when the sealing bearing 36 rotates, the brush plate 4 rotates synchronously under the driving of the sealing bearing 36, so that the brush plate 4 can push water flow to rotate, the water flow flows towards the same direction, the rotating effect of the water flow is increased, the scouring effect on the scale on the surface of the absorption tube array 2 is improved, the falling of the scale is accelerated, along with the rotation of the brush plate 4, one end, close to the absorption tube array 2, of the brush plate 4 can scrape the scale on the surface of the absorption tube array 2 first, the scale condensed on the outer wall of the absorption tube array 2 falls off under the scraping action of the brush plate 4, the thickness of the scale is reduced, the scale with the reduced thickness is scraped off by the sealing bearing 36, the scraping effect of the sealing bearing 36 on the scale on the outer wall of the absorption tube array 2 is improved, when the brush plate 4 rises under the driving of the scraper 35 and contacts with the mounting plate 3, the brush plate 4 is extruded and falls down by the mounting plate 3, the sliding block 43 slides along the arc-shaped surface of the arc-shaped chute 41, so that the sliding block 43 slides towards the groove 42 by compressing the supporting spring 45 through the pushing plate 46, when the sliding block 43 slides to the notch of the groove 42, one end of the brush plate 4 close to the absorption column tube 2 is tightly abutted to the absorption column tube 2 at the moment, and continuously rotates and rises along with the sealing bearing 36, so that the sealing bearing 36 pushes the sliding block 43 to extrude the compression spring 44 to enter the groove 42, and simultaneously, the sliding block 43 drives the brush plate 4 to rotate along the outer wall of the absorption column tube 2, so that the scale at the upper end of the absorption column tube 2 is scraped off by the brush plate 4, and the scale condensed on the outer wall of the absorption column tube 2 is greatly reduced; according to the invention, through the arrangement of the brush plate 4, the brush plate 4 can thin the scale coagulated on the outer wall of the absorption tube array 2, the seal bearing 36 can clean the scale coagulated on the outer wall of the absorption tube array 2 conveniently, the cleaning effect of the seal bearing 36 on the scale is improved, the area of rotary cutting between the seal bearing 36 and the scale is reduced, the abrasion of the seal bearing 36 is reduced, the service life of the seal bearing 36 is prolonged, and the brush plate 4 is matched with the sliding block 43, so that the brush plate 4 can scrape the scale on the surface of the absorption tube array 2 close to the upper mounting plate 3, the content of the scale coagulated on the surface of the absorption tube array 2 is reduced, and the practicability of the invention is improved.
As an embodiment of the invention, a circular hole 352 is formed at the upper end of the scraper 35, a filter screen 353 is fixedly installed at one end of the circular hole 352 far away from the liquid discharge port 12, and a filter cloth 354 is fixedly connected to the filter screen 353; when the device works, when scale on the inner wall of the absorption tube array 2 needs to be cleaned, the falling film absorber does not need to be closed, at the moment, a worker directly controls the driving motor 33 to drive the driving motor 33 to rotate through the controller, so that the scraper 35 is driven by the driving motor 33 to ascend, at the moment, condensed water above the scraper 35 flows to a position between the lower mounting plate 3 and the scraper 35 through the round hole 352 and flows out of the water outlet 15, and at the moment, the condensed water between the two mounting plates 3 is in a balanced flowing state; the heat generated by friction between the screw rod 32 and the gear 31 soaked in the condensed water is absorbed by the condensed water, the generation of friction heat between the screw rod 32 and the gear 31 is reduced, the abrasion between the screw rod 32 and the gear 31 is reduced, the service life of the screw rod 32 and the gear 31 is prolonged, and due to the arrangement of the filter cloth 354, the scale scraped off by the scraper 35 cannot enter between the lower mounting plate 3 and the scraper 35 through the round hole 352, the scale is prevented from sinking to the meshing position of the screw rod 32 and the gear 31 and damaging the screw rod 32 and the gear 31 which are driven, the filter screen 353 is arranged, the filter screen 353 plays a supporting role for the filter cloth 354, the service life of the filter cloth 354 is prolonged, the scale generation speed is slow, no obvious scale is condensed on the surface of the absorption column tube 2 only in the short time of ascending and descending of the scraper 35, and no scale is scraped off the surface of the absorption column tube 2 by the scraper 35 when the scraper 35 descends, and no scale residue is ensured between the lower mounting plate 3 and the scraper 35.
As an embodiment of the present invention, the inner wall of the housing is provided with a sliding groove 17; a limiting block 37 is connected in the sliding groove 17 in a sliding and sealing manner; the limiting block 37 is fixedly connected with the scraper 35; when the falling film absorber works, different absorption tubes 2 are made of different materials, so that the firmness of the absorption tubes 2 is different, when the driving motor 33 drives the gear 31 to rotate through the screw rod 32, the gear 31 drives the screw rod 34 to rotate, the screw rod 34 drives the scraper 35 to generate a rotation trend, the scraper 35 drives the limiting block 37 to generate a rotation trend, but the limiting block 37 is limited in the sliding groove 17, so that the limiting block 37 cannot rotate, and the limiting block 37 drives the scraper 35 to slide upwards along the sliding groove 17; when the scraper 35 generates a rotation trend, the scraper 35 only depends on the supporting function of the absorption tube array 2, so that the scraper 35 cannot rotate and rise, when the absorption tube array 2 is used for a long time, the outer wall of the absorption tube array 2 is corroded by scale, the strength of part of the absorption tube array 2 is weakened, and when the scraper 35 moves to a corroded area of the absorption tube array 2, the absorption tube array 2 cannot bear the torsion of the scraper 35 and is damaged; therefore, the limiting block 37 is matched with the sliding groove 17, so that the limiting block 37 has a limiting effect on the scraper 35, the scraper 35 is prevented from rotating, the absorption tubes 2 are prevented from being twisted and damaged by the scraper 35, the service life of the absorption tubes 2 is prolonged, the scraper 35 can be used for the absorption tubes 2 made of various materials, the application range of the scraper 35 is widened, and the actual use effect of the invention is effectively improved.
As an embodiment of the present invention, an air passage 18 is formed in the tube body 1; one end of the air passage 18 is communicated with the water inlet 14, and the other end is communicated with the sliding chute 17; when the water-saving type water-saving device works, when the scraper 35 ascends and scrapes water scale on the surface of the absorption tube array 2, the water scale scraped off by the scraper 35 is flatly paved at the upper end of the scraper 35 under the driving of the brush plate 4, so that part of the water scale can enter the chute 17 and be accumulated on the limiting block 37, and because the condensed water enters from the water inlet 14, part of the condensed water flows into the air passage 18, so that the condensed water in the air passage 18 is sprayed out from the chute 17, and when the limiting block 37 moves to the air passage 18, the condensed water sprayed out through the air passage 18 can disperse the accumulated water scale on the limiting block 37, so that no water scale is left on the limiting block 37, and the practical application effect of the water-saving type water-saving device is further improved.
The specific working process is as follows:
a worker controls absorption liquid to enter from a washing liquid port 13 through a controller, so that the absorption liquid flows over a port of an absorption tube array 2 and flows down along the inner wall of the absorption tube array 2, at the moment, hydrochloric acid tail gas is controlled to enter into a tube body 1 from an air inlet 11, the hydrochloric acid tail gas enters into the absorption tube array 2 and is absorbed by the absorption liquid on the inner wall of the absorption tube array 2, the hydrochloric acid tail gas releases heat on the inner wall of the absorption tube array 2, at the moment, the controller controls cooling water to enter from a water inlet 14 and fill between two mounting plates 3, so that the cooling water cools the absorption tube array 2, when the cooling water fills between the two mounting plates 3, a water outlet 15 is opened, the cooling water flows out from a water outlet 15, so that the water flow between the two mounting plates 3 is kept at a constant speed, when the absorption liquid flows out from the lower end of the absorption tube array 2, the absorption liquid with the hydrochloric acid in the absorption liquid is discharged from a liquid discharge port 12, and the unabsorbed hydrochloric acid tail gas is discharged from an air exhaust port 16 and is subjected to next treatment, when the scale on the outer wall of the absorption tube array 2 needs to be cleaned, a worker controls the falling film absorber to stop through the controller so that cooling water completely flows out from the water outlet 15, the controller controls the driving motor 33 to rotate so that the driving motor 33 drives the gear 31 and the screw 34 to synchronously rotate through the lead screw 32, the scraper 35 slides upwards along the inner wall of the tube body 1 so that the scraper 35 slides upwards along the absorption tube array 2, the scale on the outer wall of the absorption tube array 2 is separated from the outer wall of the absorption tube array 2 under the scraping action of the side wall of the through hole 351, when the scraper 35 is in contact with the mounting plate 3 above, the controller controls the driving motor 33 to reversely rotate so that the driving motor 33 drives the gear 31 and the screw 34 to reversely rotate, the scraper 35 resets, and the controller controls the falling film absorber to operate, cooling water enters from the water inlet 14, so that the scale above the scraper 35 flows out from the water outlet 15 along with the cooling water; during the upward movement of the scraper 35, the sealing bearing 36 in the scraper 35 moves upward under the driving of the scraper 35, so that the sealing bearing 36 drives the sliding block 361 to slide along the sliding groove, so that the sealing bearing 36 drives the sliding block 361 to rotate upwards along the spiral groove 21, so that the sealing bearing 36 can rotationally scrape the scale on the outer wall of the absorption tube 2, and the slide block 361 can scrape the scale condensed in the slide groove 17 in the process that the slide block 361 slides along the slide groove 17, when the sealing bearing 36 makes rotational friction to the hard scale condensed on the outer wall of the absorption tube 2, the hard scale is broken by the rotational friction of the sealing bearing 36, the sealing bearing 36 scrapes off the scale which is broken and adhered to the outer wall of the absorption tube array 2, so that the sealing bearing 36 is prevented from being damaged due to the impact of translational cutting between the sealing bearing 36 and the scale, and the service life of the sealing bearing 36 is prolonged; and sealed bearing 36 rotates the rivers that can drive its position department and rotate, make the rivers rotation of sealed bearing 36 top, thereby make rivers strike the incrustation scale of sealed bearing 36 cutting, the incrustation scale breaks away from the outer wall of absorption tubulation 2 with higher speed, sealed bearing 36 rotates, make rivers drive the incrustation scale rotation that sealed bearing 36 upper end was scraped, make the incrustation scale that receives to scrape rotate to keep away from absorption tubulation 2 under the centrifugation of rivers, avoid the incrustation scale to pile up too high on sealed bearing 36, prevent that sealed bearing 36 can't scrape the incrustation scale on the outer wall of absorption tubulation 2 of top under the blockking of incrustation scale.
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 tail gas purification treatment system for dichlorophenol production comprises a falling film absorber, and is characterized in that: the falling film absorber further comprises a tube body (1), an absorption tube array (2) and a controller; an upper mounting plate and a lower mounting plate (3) are fixedly mounted on the inner wall of the tube body (1), and the mounting plates (3) are used for fixing the absorption tubes (2); one end of the pipe body (1) is provided with an air inlet (11), the other end of the pipe body is provided with a liquid outlet (12), and the outer wall of the pipe body (1) is sequentially provided with a lotion opening (13), a water inlet (14), a water outlet (15) and an exhaust opening (16) between the air inlet (11) and the liquid outlet (12); the water inlet (14) is communicated with the water outlet (15); the washing liquid port (13) is positioned between the air inlet (11) and the absorption tube array (2); a gear (31) is rotatably connected to the mounting plate (3) below the pipe body (1), a screw rod (32) is rotatably and hermetically connected to the inner wall of the pipe body (1), and the screw rod (32) is meshed with the gear (31); the outer wall of the pipe body (1) is fixedly connected with a driving motor (33), and the output end of the driving motor (33) is fixedly connected with one end of the screw rod (32); the center of the gear (31) is fixedly connected with a screw rod (34), a scraper (35) is arranged on the gear (31), the scraper (35) is in threaded transmission connection with the screw rod (34), and a through hole (351) is formed in the scraper (35); the absorption array pipe (2) is connected in the through hole (351) in a sliding and sealing manner; the controller is used for controlling the automatic operation of the whole falling film absorber.
2. The system for purifying and treating the tail gas generated in the production of dichlorophenol according to claim 1, characterized in that: a sealing bearing (36) is fixedly arranged in the through hole (351); the outer wall of the absorption tube array (2) is provided with a spiral groove (21); the inner ring of the sealed bearing (36) is fixedly connected with a sliding block (361); the sliding block (361) is connected with the spiral groove (21) in a sliding and sealing mode.
3. The system for purifying and treating the tail gas generated in the production of dichlorophenol according to claim 2, characterized in that: a brush plate (4) is arranged above the sealing bearing (36); the lower end of the brush plate (4) is provided with an arc chute (41) and a groove (42); the arc chute (41) is communicated with the groove (42); a sliding block (43) is connected in the arc chute (41) in a sliding way; the sliding block (43) is fixedly connected with the sealing bearing (36); the side wall of the groove (42) is fixedly connected with a supporting spring (45), and the bottom of the groove (42) is fixedly connected with a compression spring (44); one end of the supporting spring (45) close to the sliding block (43) is fixedly connected with a pushing plate (46); the push plate (46) is in sliding contact with the slide block (43).
4. The system for purifying and treating the tail gas generated in the production of dichlorophenol according to claim 3, characterized in that: a round hole (352) is formed in the upper end of the scraper (35), a filter screen (353) is fixedly mounted at one end, far away from the liquid outlet (12), of the round hole (352), and filter cloth (354) is fixedly connected onto the filter screen (353).
5. The system for purifying and treating the tail gas generated in the production of dichlorophenol according to claim 4, wherein: the inner wall of the shell is provided with a sliding groove (17); a limiting block (37) is connected in the sliding groove (17) in a sliding and sealing manner; the limiting block (37) is fixedly connected with the scraper (35).
6. The system for purifying and treating the tail gas generated in the production of dichlorophenol according to claim 5, characterized in that: an air passage (18) is formed in the pipe body (1); one end of the air passage (18) is communicated with the water inlet (14), and the other end is communicated with the sliding groove (17).
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| CN202111107782.5A CN113750746A (en) | 2021-09-22 | 2021-09-22 | Tail gas purification processing system of dichlorophenol production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111107782.5A CN113750746A (en) | 2021-09-22 | 2021-09-22 | Tail gas purification processing system of dichlorophenol production |
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