CN214552473U - Circulation spraying system for deacidification tower - Google Patents
Circulation spraying system for deacidification tower Download PDFInfo
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- CN214552473U CN214552473U CN202023234583.4U CN202023234583U CN214552473U CN 214552473 U CN214552473 U CN 214552473U CN 202023234583 U CN202023234583 U CN 202023234583U CN 214552473 U CN214552473 U CN 214552473U
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Abstract
The utility model discloses a circulation spraying system for deacidification tower, which comprises a deacidification tower, an alkali liquor circulation tank, a spraying mechanism and a flue gas heater, wherein the alkali liquor circulation tank comprises a first alkali liquor circulation tank and a second alkali liquor circulation tank, stirring paddles are arranged in the first alkali liquor circulation tank and the second alkali liquor circulation tank, a plurality of stirring paddles in vertical direction are arranged on the stirring paddles in horizontal direction, the spraying circulation pump is connected with the spraying mechanism, the spraying mechanism comprises three spraying units which are sequentially arranged along the deacidification tower from bottom to top, a first-stage demister and a second-stage demister are sequentially arranged above the spraying units, a positive washing unit and a back washing unit are arranged above and below the first-stage demister and the second-stage demister, spray guns and spray heads used by the spraying units and the demisters are made of 316L stainless steel, the top of the deacidification tower is provided with a flue gas outlet, the flue gas outlet is sequentially connected with the flue gas heater, a draught fan and a chimney, the utility model discloses emission standard is high, and water resource consumption is little, and spray gun result of use is good.
Description
Technical Field
The utility model relates to an environmental protection equipment technical field, concretely relates to deacidify tower is with circulation spraying system.
Background
Flue gas purifier after dangerous solid waste incineration treatmentThe traditional method is a semi-dry method, a dry method and a smoke whitening device to remove harmful substances to reach the emission standard and eliminate white smoke during emission, high-temperature smoke at the outlet of a boiler is subjected to emergency cooling in a quenching tower, and the temperature of the inlet smoke is quenched to be about 500 ℃ to be about 200 ℃ at the outlet; the flue gas enters a deacidification system after passing through an outlet of a quench tower, and the important pollutant in the solid waste incineration flue gas is SO2And other acid substances such as HCl and the like, a wet deacidification system is increasingly applied to solid waste incineration, but the treatment mode of spraying the spray liquid is mostly direct discharge and then centralized treatment, so that the water consumption is very high, the treatment of a large amount of sprayed spray liquid is difficult, and the economic benefit is low; or the sprayed spray liquid is directly recycled, and the sprayed spray liquid has insufficient alkali to be subjected to neutralization reaction with acid in the flue gas, so that the efficiency is poor and the pollution is large; in addition, the spray gun for wet deacidification circulating spraying is made of glass fiber reinforced plastic which is easy to deform and crack, and the spray head is made of silicon carbide which is corrosion resistant but easy to break, so that the spraying effect is influenced; therefore, the circulating spraying system for the deacidification tower has high emission standard, low water resource consumption and good using effect of the spray gun.
Disclosure of Invention
In order to solve the problem, the utility model discloses a deacidification tower is with circulation spraying system that emission standard is high, and water resource consumption is little, and spray gun excellent in use effect.
In order to achieve the purpose, the utility model provides a circulation spraying system for deacidification tower, including the deacidification tower, alkali lye circulation tank, spray mechanism and flue gas heater, alkali lye circulation tank includes first alkali lye circulation tank and second alkali lye circulation tank, be equipped with first motor on the first alkali lye circulation tank, first motor passes through the shaft coupling and is connected with the (mixing) shaft, be equipped with the stirring rake on the (mixing) shaft horizontal direction, be equipped with the stirring rake of a plurality of vertical directions on the stirring rake of horizontal direction, second alkali lye circulation tank sets up in the below of first alkali lye tank, be equipped with the second motor on the second alkali lye circulation tank, the second motor passes through the shaft coupling and is connected with the (mixing) shaft, be equipped with the stirring rake on the (mixing) shaft horizontal direction, be equipped with the stirring rake of a plurality of vertical directions on the stirring rake of horizontal direction; the bottom of the first alkali liquor circulating tank is provided with a first liquid outlet, the bottom of the second alkali liquor circulating tank is provided with a second liquid outlet, the first liquid outlet and the second liquid outlet are connected with a spray circulating pump through a pipeline, the spray circulating pump is connected with a spray mechanism, the spray mechanism comprises a first spray unit, a second spray unit and a third spray unit which are sequentially arranged along the deacidification tower from bottom to top, the spray mechanism is positioned above a flue gas inlet, an upper included angle between the flue gas inlet and the deacidification tower is 30-60 degrees, the bottom of the deacidification tower is provided with an in-tower circulating liquid tank, the side surface of the in-tower circulating liquid tank is provided with a salinity detector, the bottom of the in-tower circulating liquid tank is provided with a waste material outlet, and the in-tower circulating liquid tank is respectively connected with the first alkali liquor circulating tank and the second alkali liquor circulating tank; a first-stage demister and a second-stage demister are sequentially arranged above the third spraying unit, a first forward washing unit and a first backwashing unit are arranged above and below the first-stage demister, and a second forward washing unit and a second backwashing unit are arranged above and below the second-stage demister; a third pH detector is arranged above the second positive flushing unit, a fourth pH detector is arranged below the first back flushing unit, a flue gas outlet is arranged at the top of the deacidification tower, and the flue gas outlet is sequentially connected with a flue gas heater, an induced draft fan and a chimney.
Further, a first pH detector is suspended at the top of the first alkali liquor circulation tank, a first liquid level detector and a second liquid level detector are arranged on the inner wall of the side face of the first alkali liquor circulation tank, the first liquid level detector is arranged above the second liquid level detector, and a first waste liquid outlet is formed in the bottom of the side face of the first alkali liquor circulation tank; a second pH detector is suspended at the top of the second alkali liquor circulating tank, a third liquid level detector and a fourth liquid level detector are arranged on the inner wall of the side surface of the second alkali liquor circulating tank, the third liquid level detector is arranged above the fourth liquid level detector, and a second waste liquid outlet is formed in the bottom of the side surface of the second alkali liquor circulating tank; the spray liquid in the first alkali liquor circulating tank is discharged from the circulating liquid tank in the tower, after the liquid level reaches the first liquid level detector, the first pH detector detects that if the pH is not in the set value range, the electromagnetic valves on the plant area industrial water main pipe and the tank area alkali liquor conveying pipe which are connected with the first alkali liquor circulating tank are opened, then stirring is started, the pH of the spray liquid is adjusted to be in the set range, the deacidification effect is enhanced, when the pH is adjusted and the liquid level of the second alkali liquor circulating tank reaches the fourth liquid level detector, the electromagnetic valve on the connecting pipeline of the second alkali liquor circulating tank and the spray circulating pump is closed, the electromagnetic valve on the connecting pipeline of the first alkali liquor circulating tank and the circulating liquid tank in the tower is opened, the electromagnetic valve on the connecting pipeline of the first alkali liquor circulating tank and the circulating liquid tank in the tower is closed, and when the liquid level of the second alkali liquor circulating tank reaches the third liquid level detector, the solenoid valve that the circulation liquid case in the tower and second lye circulating tank are connected is closed, second pH detector detects, adjust pH with the last operation, then be less than second liquid level detector when the liquid level, the solenoid valve that the circulation liquid case in the tower and first lye circulating tank are connected is opened, second lye circulating tank is opened with the solenoid valve that sprays on the circulating pump connecting line simultaneously, first lye circulating tank is closed with the solenoid valve that sprays on the circulating pump connecting line, so the circulation sprays on the same way, wait to spray salinity in the liquid and reach a definite value, the stop cycle, discharge, the new circulation that sprays is used.
Further, the first alkali liquor circulating tank is connected with a plant industrial water main and a tank area alkali liquor delivery pump; the second alkali liquor circulating tank is connected with the plant area industrial water main and the tank area alkali liquor delivery pump, the spraying liquid entering the first alkali liquor circulating tank and the second alkali liquor circulating tank from the circulating liquid tank in the tower is subjected to pH adjustment, the spraying deacidification effect is kept, after the salinity of the circulating spraying liquid reaches a certain value, fresh alkali liquor is reconfigured, the continuous operation of the whole process is kept, and the efficiency is improved.
Furthermore, the first spraying unit comprises a spraying gun, a plurality of spraying guns are arranged on the wall of the deacidification tower, the spraying guns are annularly distributed along the wall of the deacidification tower, a first annular fixing plate and a second annular fixing plate are arranged at one end of each spraying gun, the first annular fixing plate is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate is connected with a pipeline, and a plurality of spray heads are arranged on the spraying guns; the second spraying unit comprises a spraying gun, a plurality of spraying guns are arranged on the wall of the deacidification tower, the spraying guns are distributed annularly along the wall of the deacidification tower, a first annular fixing plate and a second annular fixing plate are arranged at one end of each spraying gun, the first annular fixing plate is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate is connected with a pipeline, and a plurality of spray heads are arranged on the spraying guns; the third spraying unit comprises a spraying gun, a plurality of spraying guns are arranged on the wall of the deacidification tower, the spraying guns are distributed annularly along the wall of the deacidification tower, a first annular fixing plate and a second annular fixing plate are arranged at one end of each spraying gun, the first annular fixing plate is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate is connected with a pipeline, and a plurality of spray heads are arranged on the spraying guns; the spray gun is annularly arranged, so that the spray area is larger, and the first annular fixing plate on the spray gun is connected with the outer wall of the side surface of the deacidification tower, so that the spray gun is convenient to mount and dismount.
Furthermore, the spray guns on the first spraying unit, the second spraying unit and the third spraying unit are not arranged on a vertical surface, so that the spraying is more dense, the spraying deacidification effect is better, and the emission standard is high.
Furthermore, the spray gun and the spray head are made of 316L stainless steel, so that the defects that the spray gun for the conventional wet deacidification circulating spraying is made of glass fiber reinforced plastics and is easy to deform and crack, and the spray head is made of silicon carbide and is corrosion-resistant but easy to break, so that the spraying effect is influenced are overcome; the spray gun and the spray head are changed into 316L stainless steel materials, the using effect is good, and SO in the flue gas2The stability is obviously improved by HCl control.
Further, the first positive flushing unit, the first back flushing unit, the second positive flushing unit and the second back flushing unit are connected with a main cleaning pipe, the main cleaning pipe is connected with a cleaning pump and a spraying circulating pump, the cleaning pump is connected with a plant industrial water main pipe, the flushed flue gas is detected by a third pH detector, if the pH value is not within a set range, a valve connected with the spraying circulating pump of the main cleaning pipe is opened, deacidification is further performed, and if the pH value is within the set range, industrial water is used for further cleaning, so that the discharged flue gas is ensured to meet requirements.
Furthermore, the first positive flushing unit, the first backwashing unit, the second positive flushing unit and the second backwashing unit are formed by annularly distributing a plurality of spray guns, the spray guns are annularly distributed along the wall of the deacidification tower, one end of each spray gun is provided with a first annular fixing plate and a second annular fixing plate, the first annular fixing plate is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate is connected with a pipeline, and the spray guns are provided with a plurality of spray heads; furthermore, the spray gun and the spray head are made of 316L stainless steel, so that sufficient demisting and cleaning are guaranteed.
Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:
(1) the utility model is provided with a first alkali liquor circulating tank and a second alkali liquor circulating tank, and is provided with a stirring paddle, a first pH detector, a second pH detector, a first liquid level detector, a second liquid level detector, a third liquid level detector and a fourth liquid level detector, and is used with each pipeline and the matching of valves on the pipelines, so that the spraying system can guarantee the effect of spraying and deacidification on the basis of continuous and uninterrupted operation; the spray rods are distributed annularly, and spray guns on the first spray unit, the second spray unit and the third spray unit are not arranged on a vertical surface, so that the spray is denser, the spray deacidification effect is better, and the emission standard is high; the spray gun and the spray head are made of 316L stainless steel, the using effect is good, and SO in the flue gas2The stability is obviously improved along with HCl control, the problems that the spray gun for the original wet deacidification circulating spraying is made of glass fiber reinforced plastic and is easy to deform and crack, and the spray head is made of silicon carbide and is corrosion-resistant, but is easy to break and influences the spraying effect are solved.
(2) The utility model discloses set up one-level defroster and second grade defroster in the deacidification tower, the top and the below of one-level defroster are equipped with first positive washing unit and first back flush unit, the top and the below of second grade defroster are equipped with the positive washing unit of second and the back flush unit of second, fully guarantee the defogging effect, the positive washing unit top of second is equipped with third pH detector, first back flush below is equipped with fourth pH detector, ensure that exhaust flue gas meets the requirements, the deacidification tower top of the tower is equipped with the exhanst gas outlet, the exhanst gas heater is connected gradually in the exhanst gas outlet, draught fan and chimney, the white fog phenomenon does not appear in the flue gas that sets up messenger exhaust flue gas of exhanst gas heater, further improve emission standard, the utility model relates to a circulating spray system for the deacidification tower, emission standard is high, and the water resource consumption is little, and the spray gun excellent in use effect.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the lye circulating tank of the present invention;
fig. 3 is a schematic structural view of the first spraying unit, the second spraying unit and the third spraying unit of the present invention;
FIG. 4 is a schematic view of the structure of the spray gun of the present invention;
FIG. 5 is a left side view of the spray gun of the present invention;
description of reference numerals:
1. an alkali liquor circulation tank; 2. a second lye circulating tank; 3. a first motor; 4. a stirring rod; 5. a stirring paddle; 6. a second pH detector; 7. a first pH detector; 8. a first lye circulation tank; 9. a first motor; 10. a first liquid level detector; 11. a second liquid level detector; 12. a third liquid level detector; 13. a fourth liquid level detector; 14. a spray circulation pump; 15. cleaning the pump; 151. cleaning a main pipe; 16. a deacidification tower; 17. a second positive flushing unit; 18. a secondary demister; 19. a second backwash unit; 20. a first positive flushing unit; 21. a first-stage demister; 22. a first backwash unit; 23. a third pH detector; 24. a fourth pH detector; 25. a third spraying unit; 26. a second spraying unit; 27. a first spraying unit; 28. a circulating liquid tank in the tower; 29. a waste outlet; 30. a flue gas inlet; 31. a flue gas outlet; 32. a flue gas heater; 33. an induced draft fan; 34. a chimney; 35. a first annular fixed plate; 36. a spray head; 37. a second annular fixing plate; 38. a first liquid outlet; 39. a second liquid outlet; 40. a salinity detector; 41. a first waste outlet; 42. a second waste liquid outlet.
Detailed Description
The technical solutions provided by the present invention will be described in detail with reference to specific embodiments, and it should be understood that the following specific embodiments are only used for illustrating the present invention and are not used for limiting the scope of the present invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example (b): as shown in fig. 1 to 5, a circulating spray system for a deacidification tower comprises a deacidification tower 16, an alkali liquor circulating tank 1, a spray mechanism and a flue gas heater 32, wherein the alkali liquor circulating tank 1 comprises a first alkali liquor circulating tank 8 and a second alkali liquor circulating tank 2, a first motor 9 is arranged on the first alkali liquor circulating tank 8, the first motor 9 is connected with a stirring shaft 4 through a coupler, a stirring paddle 5 is arranged in the horizontal direction of the stirring shaft 4, a plurality of stirring paddles in the vertical direction are arranged on the stirring paddle in the horizontal direction, the second alkali liquor circulating tank 2 is arranged below the first alkali liquor tank 8, a second motor 3 is arranged on the second alkali liquor circulating tank 2, the second motor 3 is connected with the stirring shaft 4 through the coupler, a stirring paddle 5 is arranged in the horizontal direction of the stirring shaft 4, and a plurality of stirring paddles in the vertical direction are arranged on the stirring paddle in the horizontal direction; a first liquid outlet 38 is arranged at the bottom of the first alkali liquor circulating tank 8, a second liquid outlet 39 is arranged at the bottom of the second alkali liquor circulating tank 2, the first liquid outlet 38 and the second liquid outlet 39 are connected with a spraying circulating pump 14 through a pipeline, the spraying circulating pump 14 is connected with a spraying mechanism, the spraying mechanism comprises a first spraying unit 27, a second spraying unit 26 and a third spraying unit 25 which are sequentially arranged along the deacidification tower 16 from bottom to top, the spraying mechanism is positioned above a flue gas inlet 30, the upper included angle between the flue gas inlet 30 and the deacidification tower 16 is 30-60 degrees, an in-tower circulating liquid tank 28 is arranged at the bottom of the deacidification tower 16, a salinity detector 40 is arranged on the side surface of the in-tower circulating liquid tank 28, a waste outlet 29 is arranged at the bottom of the in-tower circulating liquid tank 28, and the in-tower circulating liquid tank 28 is respectively connected with the first alkali liquor circulating tank 8 and the second alkali liquor circulating tank 2; a first-stage demister 21 and a second-stage demister 18 are sequentially arranged above the third spraying unit 25, a first positive washing unit 20 and a first backwashing unit 22 are arranged above and below the first-stage demister 21, and a second positive washing unit 17 and a second backwashing unit 19 are arranged above and below the second-stage demister 18; a third pH detector 23 is arranged above the second positive washing unit 17, a fourth pH detector 24 is arranged below the first back washing unit 22, a flue gas outlet 31 is arranged at the top of the deacidification tower 16, and the flue gas outlet 31 is sequentially connected with a flue gas heater 32, an induced draft fan 33 and a chimney 34.
Further, a first pH detector 7 is suspended at the top of the first alkali liquor circulating tank 8, a first liquid level detector 10 and a second liquid level detector 11 are arranged on the inner wall of the side surface of the first alkali liquor circulating tank 8, the first liquid level detector 10 is arranged above the second liquid level detector 11, and a first waste liquid outlet 41 is arranged at the bottom of the side surface of the first alkali liquor circulating tank 8; second pH detector 6 has been hung at 2 tops of second lye circulating tank, is equipped with third liquid level detector 12 and fourth liquid level detector 13 on 2 side inner walls of second lye circulating tank, and third liquid level detector 12 is equipped with second waste liquid outlet 42 in the top of fourth liquid level detector 13, 2 side bottoms of second lye circulating tank.
Further, the first alkali liquor circulating tank 8 is connected with a plant industrial water main and a tank area alkali liquor delivery pump; the second alkali liquor circulating tank 2 is connected with a plant industrial water main and a tank area alkali liquor delivery pump.
Further, the first spraying unit 27 includes a spray gun, a plurality of spray guns are arranged on the wall of the deacidification tower, the spray guns are distributed annularly along the wall 16 of the deacidification tower, one end of each spray gun is provided with a first annular fixing plate 35 and a second annular fixing plate 37, the first annular fixing plate 35 is connected with the outer wall of the side face of the deacidification tower 16, the second annular fixing plate 37 is connected with a pipeline, and a plurality of spray heads 36 are arranged on each spray gun; the second spraying unit 26 comprises a spray gun, a plurality of spray guns are arranged on the wall of the deacidification tower, the spray guns are distributed annularly along the wall of the deacidification tower, a first annular fixing plate 35 and a second annular fixing plate 37 are arranged at one end of each spray gun, the first annular fixing plate 35 is connected with the outer wall of the side face of the deacidification tower 16, the second annular fixing plate 37 is connected with a pipeline, and a plurality of spray heads 36 are arranged on the spray guns; the third spraying unit 25 comprises a spray gun, a plurality of spray guns are arranged on the wall of the deacidification tower 16, the spray guns are distributed annularly along the wall of the deacidification tower, a first annular fixing plate 35 and a second annular fixing plate 37 are arranged at one end of each spray gun, the first annular fixing plate 35 is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate 37 is connected with a pipeline, and a plurality of spray heads 36 are arranged on the spray guns.
Further, the spray guns on the first spray unit 27, the second spray unit 26 and the third spray unit 25 are not on one vertical plane.
Furthermore, the spray gun and the spray head 36 are made of 316L stainless steel, so that the problems that the spray gun for the original wet deacidification circulating spraying is made of glass fiber reinforced plastics and is easy to deform and crack, and the spray head is made of silicon carbide and is corrosion-resistant but easy to break, so that the spraying effect is influenced are solved; the spray gun and the spray head are changed into 316L stainless steel materials, the using effect is good, and SO in the flue gas2The stability is obviously improved by HCl control.
Further, the first positive-flushing unit 20, the first backwashing unit 22, the second positive-flushing unit 17, and the second backwashing unit 19 are connected to a washing header 151, and the washing header 151 is connected to the washing pump 15 and the shower circulation pump 14.
Furthermore, the first positive flushing unit 20, the first backwashing unit 22, the second positive flushing unit 17 and the second backwashing unit 19 are formed by annularly distributing a plurality of spray guns, the spray guns are annularly distributed along the wall of the deacidification tower, one ends of the spray guns are provided with a first annular fixing plate 35 and a second annular fixing plate 37, the first annular fixing plate 35 is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate 37 is connected with a pipeline, the spray guns are provided with a plurality of spray heads 36, the spray guns and the spray heads are made of 316L stainless steel, and accordingly sufficient demisting and cleaning are guaranteed.
The working principle is as follows: the utility model relates to a circulation spraying system for a deacidification tower, which is characterized in that when in work, a valve connecting a first alkali liquor circulation tank 8 with a plant area industrial water main and a tank area alkali liquor delivery pump is opened; the valve of the second alkali liquor circulating tank 2 connected with the plant industrial water main and the tank area alkali liquor delivery pump is opened, the first motor 9 and the second motor 3 are started, alkali liquor with certain concentration is configured in the first alkali liquor circulating tank 8 and the second alkali liquor circulating tank 2, when the liquid level of the alkali liquor reaches the first liquid level detector 10 and the third liquid level detector 12, the valve of the first alkali liquor circulating tank 8 or the second alkali liquor circulating tank 2 connected with the circulating spray pump 14 is opened, the flue gas enters the spray mechanism from the flue gas inlet, the flue gas is sprayed and deacidified by the first spray unit 27, the second spray unit 26 and the third spray unit 25, then the demisting is carried out by the first-stage demister 21 and the second-stage demister 18, all the sprayed liquid flows to the tower bottom internal circulating liquid tank 28, when the liquid level of the first alkali liquor circulating tank 8 is lower than the second liquid level detector 11, the tower internal circulating liquid tank 28 discharges the sprayed liquid to the first alkali liquor circulating tank 8, after the liquid level reaches the first liquid level detector 10, the first pH detector 7 detects that if the pH is not in the set value range, electromagnetic valves on plant industrial water main pipes and tank area alkali liquid conveying pipes connected with the first alkali liquid circulating tank 8 are opened, then stirring is started, the pH of the spraying liquid is adjusted to be in the set range, the deacidification effect is enhanced, when the pH is adjusted and the liquid level of the second alkali liquid circulating tank 2 reaches the fourth liquid level detector 13, the electromagnetic valve on a connecting pipeline of the second alkali liquid circulating tank 2 and the spraying circulating pump is closed, the electromagnetic valve on a connecting pipeline of the first alkali liquid circulating tank 8 and the spraying circulating pump 14 is opened, meanwhile, the electromagnetic valve on a connecting pipeline of the second alkali liquid circulating tank 2 and an inner tower circulating liquid tank 18 is opened, the electromagnetic valve on a connecting pipeline of the first alkali liquid circulating tank 8 and an inner tower circulating liquid tank 28 is closed, and when the liquid level of the second alkali liquid circulating tank 2 reaches the third liquid level detector 12, closing an electromagnetic valve connected with the second alkali liquor circulating tank 2 by the in-tower circulating liquid tank 28, detecting by the second pH detector 6, adjusting the pH value by the operation in the same way, then opening an electromagnetic valve connected with the first alkali liquor circulating tank 8 by the in-tower circulating liquid tank 28 when the liquid level is lower than the second liquid level detector 11, simultaneously opening an electromagnetic valve on a connecting pipeline of the second alkali liquor circulating tank 2 and the spraying circulating pump 14, closing the electromagnetic valve on a connecting pipeline of the first alkali liquor circulating tank 8 and the spraying circulating pump 14, and circularly spraying in the same way, stopping circulation, discharging and replacing new spraying liquid for recycling when the salinity in the spraying liquid reaches a certain value; a third pH detector 23 above the second-stage demister 21 and a fourth pH detector 24 below the first-stage demister 21 are used for carrying out pH detection on the deacidified flue gas, if the flue gas is not in a pH detection set range, a valve for connecting the cleaning main pipe 151 with the spraying circulating pump 14 is opened for further deacidification, and if the pH is in the set range, industrial water is used for further cleaning; the flue gas discharged from the flue gas outlet 31 at the top of the tower enters a flue gas heater 32 for heating and is discharged from a chimney 34 through an induced draft fan 33, so that the discharged flue gas is ensured to meet the requirements and has no white smoke phenomenon.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made without departing from the spirit and scope of the present invention.
Claims (9)
1. A circulating spray system for a deacidification tower is characterized by comprising the deacidification tower, an alkali liquor circulating tank, a spray mechanism and a flue gas heater, wherein the alkali liquor circulating tank comprises a first alkali liquor circulating tank and a second alkali liquor circulating tank, a first motor is arranged on the first alkali liquor circulating tank, the first motor is connected with a stirring shaft through a coupler, a stirring paddle is arranged in the horizontal direction of the stirring shaft, a plurality of stirring paddles in the vertical direction are arranged on the stirring paddle in the horizontal direction, the second alkali liquor circulating tank is arranged below the first alkali liquor tank, a second motor is arranged on the second alkali liquor circulating tank, the second motor is connected with the stirring shaft through a coupler, a stirring paddle is arranged in the horizontal direction of the stirring shaft, and a plurality of stirring paddles in the vertical direction are arranged on the stirring paddle in the horizontal direction; the bottom of the first alkali liquor circulating tank is provided with a first liquid outlet, the bottom of the second alkali liquor circulating tank is provided with a second liquid outlet, the first liquid outlet and the second liquid outlet are connected with a spray circulating pump through a pipeline, the spray circulating pump is connected with a spray mechanism, the spray mechanism comprises a first spray unit, a second spray unit and a third spray unit which are sequentially arranged along the deacidification tower from bottom to top, the spray mechanism is positioned above a flue gas inlet, an upper included angle between the flue gas inlet and the deacidification tower is 30-60 degrees, the bottom of the deacidification tower is provided with an in-tower circulating liquid tank, the side surface of the in-tower circulating liquid tank is provided with a salinity detector, the bottom of the in-tower circulating liquid tank is provided with a waste material outlet, and the in-tower circulating liquid tank is respectively connected with the first alkali liquor circulating tank and the second alkali liquor circulating tank; a first-stage demister and a second-stage demister are sequentially arranged above the third spraying unit, a first forward washing unit and a first backwashing unit are arranged above and below the first-stage demister, and a second forward washing unit and a second backwashing unit are arranged above and below the second-stage demister; a third pH detector is arranged above the second positive flushing unit, a fourth pH detector is arranged below the first back flushing unit, a flue gas outlet is arranged at the top of the deacidification tower, and the flue gas outlet is sequentially connected with a flue gas heater, an induced draft fan and a chimney.
2. The circulating spraying system for the deacidification tower according to claim 1, wherein a first pH detector is suspended at the top of the first alkali liquor circulating tank, a first liquid level detector and a second liquid level detector are arranged on the inner wall of the side surface of the first alkali liquor circulating tank, the first liquid level detector is arranged above the second liquid level detector, and a first waste liquid outlet is arranged at the bottom of the side surface of the first alkali liquor circulating tank; and a second pH detector is suspended at the top of the second alkali liquor circulating tank, a third liquid level detector and a fourth liquid level detector are arranged on the inner wall of the side surface of the second alkali liquor circulating tank, the third liquid level detector is arranged above the fourth liquid level detector, and a second waste liquor outlet is arranged at the bottom of the side surface of the second alkali liquor circulating tank.
3. The circulating spraying system for the deacidification tower according to the claim 2, wherein the first alkali liquor circulating tank is connected with a plant area industrial water main and a tank area alkali liquor conveying pump; and the second alkali liquor circulating tank is connected with the plant area industrial water main and the tank area alkali liquor delivery pump.
4. The circulating spray system for the deacidification tower according to claim 1, wherein the first spray unit comprises a spray gun, a plurality of spray guns are arranged on the wall of the deacidification tower, the spray guns are distributed along the wall of the deacidification tower in an annular mode, a first annular fixing plate and a second annular fixing plate are arranged at one end of each spray gun, the first annular fixing plate is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate is connected with a pipeline, and a plurality of spray heads are arranged on the spray guns; the second spraying unit comprises a spraying gun, a plurality of spraying guns are arranged on the wall of the deacidification tower, the spraying guns are distributed annularly along the wall of the deacidification tower, a first annular fixing plate and a second annular fixing plate are arranged at one end of each spraying gun, the first annular fixing plate is connected with the outer wall of the side face of the deacidification tower, the second annular fixing plate is connected with a pipeline, and a plurality of spray heads are arranged on the spraying guns; the third sprays the unit and includes the spray gun, is equipped with a plurality of spray guns on the deacidification tower wall, and the spray gun distributes along deacidification tower wall annular, and the one end of spray gun is equipped with first annular fixed plate and second annular fixed plate, first annular fixed plate and deacidification tower side outer wall connection, second annular fixed plate and tube coupling, are equipped with a plurality of shower nozzles on the spray gun.
5. The circulating spraying system for the deacidification tower according to claim 4, wherein the spray guns on the first spraying unit, the second spraying unit and the third spraying unit are not on a vertical plane.
6. The circulating spraying system for the deacidification tower according to claim 5, wherein the material of the spray gun and the spray head is 316L stainless steel.
7. The circulating spray system for the deacidification tower according to claim 1, wherein the first positive flushing unit, the first back flushing unit, the second positive flushing unit and the second back flushing unit are connected with a cleaning main pipe, the cleaning main pipe is connected with a cleaning pump and a spray circulating pump, and the cleaning pump is connected with a factory industrial water main pipe.
8. The circulating spray system for the deacidification tower according to claim 7, wherein the first positive flushing unit, the first back flushing unit, the second positive flushing unit and the second back flushing unit are formed by a plurality of spray guns which are annularly distributed along the wall of the deacidification tower, one end of each spray gun is provided with an annular fixed plate, the annular fixed plate is connected with the outer wall of the side surface of the deacidification tower, and the spray guns are provided with a plurality of spray heads.
9. The circulating spraying system for the deacidification tower according to claim 8, wherein the material of the spray gun and the spray head is 316L stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023234583.4U CN214552473U (en) | 2020-12-29 | 2020-12-29 | Circulation spraying system for deacidification tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023234583.4U CN214552473U (en) | 2020-12-29 | 2020-12-29 | Circulation spraying system for deacidification tower |
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| CN214552473U true CN214552473U (en) | 2021-11-02 |
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