CN114159960A - Alkaline slurry injection SO that can accurate measurement is adjusted3Removal equipment - Google Patents

Alkaline slurry injection SO that can accurate measurement is adjusted3Removal equipment Download PDF

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Publication number
CN114159960A
CN114159960A CN202111180389.9A CN202111180389A CN114159960A CN 114159960 A CN114159960 A CN 114159960A CN 202111180389 A CN202111180389 A CN 202111180389A CN 114159960 A CN114159960 A CN 114159960A
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pipeline
communicated
water
discharge
tank
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CN202111180389.9A
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Inventor
赵柄
王涵
王海刚
张紫薇
金绪良
李旭凯
张猛
杨超
许超
殷爱鸣
赵秉政
王泽�
贾嘉
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Thermal Power Generation Technology Research Institute of China Datang Corporation Science and Technology Research Institute Co Ltd
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Thermal Power Generation Technology Research Institute of China Datang Corporation Science and Technology Research Institute Co Ltd
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Priority to CN202111180389.9A priority Critical patent/CN114159960A/en
Publication of CN114159960A publication Critical patent/CN114159960A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses alkaline slurry injection SO capable of being accurately metered and adjusted3A removal apparatus, comprising: solution preparation metering system, solution preparation metering system includes the storage jar, the discharge end of storage jar communicates with the feed end of a plurality of parallelly connected ejection of compact pipelines that set up, every the discharge end of ejection of compact pipeline respectively with spoutConnecting a shooting system; and the compressed air system is respectively communicated with the discharge end of each discharge pipeline. The discharge pipeline comprises a plurality of discharge pipes arranged in parallel, each discharge pipe is sequentially provided with a first maintenance valve, a delivery pump and a first flowmeter from a feed end to a discharge end, and the discharge end of each discharge pipe is converged with the air outlet end of the compressed air system and is connected with the corresponding injection system. The invention can control the spray gun to spray into the flues at two sides, and realize the accurate control of the spray gun.

Description

Alkaline slurry injection SO that can accurate measurement is adjusted3Removal equipment
Technical Field
The invention relates to the technical field of coal-fired flue gas pollutant control, in particular to alkaline slurry injection SO capable of being accurately metered and adjusted3And (4) removing equipment.
Background
SO is generated when the sulfur-containing coal is combusted in the furnace2When the excess air ratio is greater than 1, there is about 0.5% to 2.0% SO under complete combustion conditions2Will be further oxidized to form SO3. When the smoke is heated by convection, the smoke is inIn fly ash or ash deposited on the heating surface, iron oxide, silicon oxide, aluminum oxide, sodium oxide, etc. act on SO2All have certain catalytic action. When the flue gas flows through the SCR catalyst, V2O5Will catalyze SO2Formation of SO3Also, SO will be generated3The content in the smoke rises.
SO generated by combustion in furnace and oxidation in flue3And the method has serious harm to the safe operation of the power unit and the atmospheric environment: SO (SO)3Ammonium sulfate and ammonium bisulfate are generated and can block the catalyst, so that the denitration efficiency is reduced and the resistance is increased; SO (SO)3The generated mixture of sulfuric acid, ammonium sulfate and ammonium bisulfate can be attached to the air preheater to cause corrosion and blockage of the air preheater, and the air preheater needs to be shut down for cleaning in serious cases, otherwise the normal operation of the boiler is influenced; due to SO3The temperature of the exhaust gas and the temperature of the outlet of the air preheater are increased, and the thermal efficiency of the boiler is reduced; SO (SO)3The blue plume created by the emission into the atmosphere increases the opacity of the exhaust fumes and SO3The waste gas is converted into sulfuric acid during smoke discharge, and the pollution of acid rain is directly caused.
For relieving and eliminating SO3The industry has proposed a lot of SO reduction3The generated control technology, such as the magnesium spraying technology in the furnace, the ammonia spraying before the electrostatic dust collector, the wet electric dust collection and the like. In addition to the above techniques, SO is carried out by injecting an alkaline substance into the flue3Removal has proven to be an effective solution.
At present, the method aims at using alkaline substances to carry out SO on flue gas3Some methods and devices for removing the alkaline substances exist, but the addition amount of the alkaline substances is not controlled, waste is caused by excessive addition, the optimal removal effect cannot be achieved by too little addition, and further improvement and perfection are needed.
Thus, the person skilled in the art provides an alkaline slurry injection SO that can be precisely metered and adjusted3A removing device to solve the problems in the background technology.
Disclosure of Invention
The invention provides a spray gun capable of controlling the spraying of a spray gun to two sidesFlue, alkaline slurry injection SO capable of realizing accurate control of spray gun and accurate metering and adjustment3And (4) removing equipment.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention relates to alkaline slurry injection SO capable of being accurately metered and adjusted3A removal apparatus, the apparatus comprising:
the material storage and conveying system comprises a material storage tank and a conveying mechanism communicated with the material storage tank;
the solution preparation and metering system comprises a dilution water tank, a dissolving tank and a storage tank, wherein the water outlet end of the dilution water tank is communicated with the water inlet end of the dissolving tank through a water outlet pipeline, the feed end of the dissolving tank is communicated with the discharge end of a conveying mechanism, the discharge end of the dissolving tank is communicated with the feed end of the storage tank through a material conveying pipeline, the discharge end of the storage tank is communicated with the feed ends of a plurality of discharge pipelines arranged in parallel, and the discharge end of each discharge pipeline is respectively connected with an injection system;
and the compressed air system is respectively communicated with the discharge end of each discharge pipeline.
The discharging pipeline comprises a plurality of discharging pipes arranged in parallel, each discharging pipe is sequentially provided with a first maintenance valve, a delivery pump and a first flowmeter from a feeding end to a discharging end, the feeding end of each discharging pipe is communicated with the storage tank, and the discharging end of each discharging pipe is converged with the air outlet end of the compressed air system and is connected with the corresponding injection system.
Furthermore, each discharging pipe is connected with a first return pipe, the feeding end of each first return pipe is located between the conveying pump and the first flowmeter, the discharging end of each first return pipe is communicated with the storage tank, and each first return pipe is provided with a first regulating valve.
Further, be provided with the agitator in the dissolving tank, install electric heater on the lateral wall of dissolving tank, the top and the exhaust pipe way intercommunication of dissolving tank, install the exhaust fan on the exhaust pipe way, still install densimeter and thermometer, PH meter on the dissolving tank.
Furthermore, a second maintenance valve and a transfer pump are sequentially installed from the feeding end to the discharging end of the conveying pipeline, the conveying pipeline is further connected with a second material return pipe, the feeding end of the second material return pipe is installed between the transfer pump and the discharging end of the conveying pipeline, the discharging end of the second material return pipe is communicated with the dissolving tank, and a second regulating valve is installed on the second material return pipe.
Furthermore, a third maintenance valve and a water supply pump are sequentially arranged from the water inlet end to the water outlet end of the water outlet pipeline.
Furthermore, the top end of the dilution water tank is communicated with the softened water pipeline, a liquid level meter is installed on the side wall of the dilution water tank, the dilution water tank is further communicated with the plurality of discharge pipes through a plurality of parallel water conveying pipelines respectively, the number of the water conveying pipelines is consistent with that of the discharge pipes, and the water outlet end of each water conveying pipeline is located at the upstream of the junction of the corresponding discharge pipe and the compressed air system.
Furthermore, a valve, a dilution water pump, a second flowmeter and a pressure gauge are sequentially arranged from the water inlet end to the water outlet end of each water conveying pipeline, each water conveying pipeline is connected with a water return pipeline, the water inlet end of each water return pipeline is located between the dilution water pump and the second flowmeter, the water outlet end of each water return pipeline is communicated with the dilution water tank, and a third regulating valve is arranged on each water return pipeline.
Further, install sack cleaner and charge level indicator on the material holding vessel, the top of material holding vessel is provided with the feed inlet, and the pneumatic batcher of back taper is installed to the bottom of material holding vessel, the output and the conveying mechanism intercommunication of the pneumatic batcher of back taper.
Further, the conveying mechanism comprises a first conveying pipeline and a second conveying pipeline, the feeding end of the first conveying pipeline is communicated with the discharging end of the inverted-cone pneumatic feeder, the discharging end of the first conveying pipeline is communicated with the feeding end of the weighing tank, the discharging end of the weighing tank is communicated with the feeding end of the second conveying pipeline, the discharging end of the second conveying pipeline is communicated with the feeding end of the exhaust hopper, the exhaust end of the exhaust hopper is communicated with the material storage tank through a gas return pipeline, the discharging end of the exhaust hopper is provided with conveying rotation, the conveying rotary valve is communicated with the feeding boot, the gas inlet end of the feeding boot is communicated with the gas outlet end of the Roots blower, and the discharging end of the feeding boot is communicated with the dissolving tank through a third conveying pipeline; a manual valve and a pneumatic dome valve are mounted on the first conveying pipeline, the pneumatic dome valve is mounted at the feeding end of the weighing tank, and the manual valve is arranged close to the inverted cone-shaped pneumatic feeder; a feeding rotary valve is arranged on the second conveying pipeline; and a sealing valve is arranged on the third conveying pipeline.
Further, the compressed air system comprises a compressed air main pipe, an adsorption dryer and an air storage tank which are connected in sequence, and the air storage tank is converged at the discharge end of the discharge pipe through an air conveying pipeline.
In the technical scheme, the alkaline slurry injection SO capable of being accurately metered and adjusted is provided by the invention3The removing equipment has the following beneficial effects: accurately controlling the flow of the concentrated solution and the softened water by adopting a first flow meter, a first regulating valve, a second flow meter and a third regulating valve, and diluting the concentrated solution into a dilute solution with required concentration; compressed air is dedusted and dehumidified by an adsorption dryer and is pressurized by an air storage tank, then is mixed with prepared dilute solution at a spray gun, and finally is sprayed into flues at two sides by the spray gun, so that the precise control of the spray gun is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 shows an alkaline slurry injection SO capable of precise metering adjustment according to an embodiment of the present invention3The structure of the removing device is shown schematically.
Description of reference numerals:
1. a material storage tank; 2. a dilution water tank; 3. a dissolving tank; 4. storing the tank; 5. a water outlet pipeline; 6. a material conveying pipeline; 7. an injection system; 8. a pH meter; 9. a discharge pipe; 10. a first service valve; 11. a delivery pump; 12. a first flow meter; 13. a first return pipe; 14. a first regulating valve; 15. a stirrer; 16. an electric heater; 17. an exhaust duct; 18. an exhaust fan; 19. a densitometer; 20. a thermometer; 21. a second service valve; 22. a dump pump; 23. a second feed back pipe; 24. a second regulating valve; 25. a third service valve; 26. a water supply pump; 27. a softened water pipeline; 28. a liquid level meter; 29. a water delivery pipeline; 30. a valve; 31. a dilution water pump; 32. a second flow meter; 33. a pressure gauge; 34. a water return pipeline; 35. a third regulating valve; 36. a bag-type dust collector; 37. a level gauge; 38. a feed inlet; 39. an inverted conical pneumatic feeder; 40. a first delivery line; 41. a second delivery line; 42. weighing the tank; 43. an exhaust hopper; 44. a gas transmission pipeline; 45. a feeding shoe; 46. a Roots blower; 47. a third delivery line; 48. a manual valve; 49. a pneumatic dome valve; 50. a feed rotary valve; 51. sealing the valve; 52. a gas transmission pipeline; 53. a compressed air main pipe; 54. an adsorption dryer; 55. a gas storage tank; 56. a conveying rotary valve.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1;
the embodiment of the invention provides alkaline slurry injection SO capable of being accurately metered and adjusted3A removal apparatus, the apparatus comprising:
the material storage and conveying system comprises a material storage tank 1 and a conveying mechanism communicated with the material storage tank 1, and the volume of the material storage tank is 50m3；
Solution preparation metering system, solution preparation metering system includes dilution water pitcher 2, dissolving tank 3 and storage jar 4, the play water end of dilution water pitcher 2 passes through outlet pipe way 5 and dissolving tank 3's the end intercommunication of intaking, dissolving tank 3's feed end and conveying mechanism's discharge end intercommunication, dissolving tank 3's discharge end is through defeated material pipeline 6 and storage jar 4The feed end of storage jar 4 communicates, the discharge end of storage jar 4 communicates with the feed end of a plurality of parallelly connected discharge pipe ways that set up, every discharge pipe way's discharge end is connected with injection system 7 respectively, and the volume of dilution water pitcher 2 is 30m3The volume of the dissolving tank 3 is 30m3；
And the compressed air system is respectively communicated with the discharge end of each discharge pipeline.
The discharge pipeline comprises a plurality of discharge pipes 9 arranged in parallel, each discharge pipe 9 is sequentially provided with a first maintenance valve 10, a delivery pump 11 and a first flowmeter 12 from a feed end to a discharge end, the feed end of the discharge pipe 9 is communicated with the storage tank 4, and the discharge end of the discharge pipe 9 is converged with the air outlet end of the compressed air system and is connected with the corresponding injection system 7.
The solution preparation metering system adopts the first flowmeter 12 to control the material quantity conveyed to the injection system 7, can realize the accurate conveying of the material quantity and ensure the SO3The waste of the alkaline solution is avoided while the removing effect of the catalyst is improved.
The number of injection systems 7 of the present application is preferably two.
Each discharging pipe 9 is connected with a first return pipe 13, the feeding end of each first return pipe 13 is located between the conveying pump 11 and the first flowmeter 12, the discharging ends of the first return pipes 13 are communicated with the storage tank 4 after being converged, and each first return pipe 13 is provided with a first regulating valve 14. The arrangement of the first material return pipe 13 can recover the material (alkali liquor after matching) entering the material discharge pipe 9 and the part which is not sprayed out by the injection system, so that the influence on the quality of the material and the reuse caused by the storage in the material discharge pipe 9 is avoided.
Be provided with agitator 15 in the dissolving tank 3, install electric heater 16 on the lateral wall of dissolving tank 3, the top and the exhaust pipe 17 intercommunication of dissolving tank 3, install exhaust fan 18 on the exhaust pipe 17, still install densimeter 19 and thermometer 20, PH meter 8 on the dissolving tank 3. The stirrer 15 in the dissolving tank 3 is used for stirring the materials and water entering the dissolving tank 3, configuring the materials and water into alkali liquor with preset requirements, and detecting corresponding indexes of the alkali liquor through the densimeter 19, the thermometer 20 and the PH meter 8 so as to enter the next process according with the standard.
The material conveying pipeline 6 is sequentially provided with a second maintenance valve 21 and a transfer pump 22 from a feeding end to a discharging end, the material conveying pipeline 6 is further connected with a second material return pipe 23, the feeding end of the second material return pipe 23 is arranged between the transfer pump 22 and the discharging end of the material conveying pipeline 6, the discharging end of the second material return pipe 23 is communicated with the dissolving tank 3, and the second material return pipe 23 is provided with a second regulating valve 24. The unloading pump 22 on the material conveying pipeline 6 is used for conveying the alkali liquor prepared by the dissolving tank 3 into the storage tank 4; the second material return pipe 23 is arranged to recover the material (matched alkali liquor) entering the material conveying pipeline 6 and the part which does not enter the storage tank 4, so that the influence on the quality of the material and the reuse caused by the storage in the material conveying pipeline 6 is avoided.
And a third maintenance valve 25 and a water supply pump 26 are sequentially arranged from the water inlet end to the water outlet end of the water outlet pipeline 5. The water pipeline 5 may also be provided with a flow meter to facilitate control of the amount of water added to the dissolving tank 3 and solution preparation.
The top end of the dilution water tank 2 is communicated with a softened water pipeline 27, a liquid level meter 28 is installed on the side wall of the dilution water tank 2, the dilution water tank 2 is further communicated with the discharge pipes 9 through a plurality of parallel water conveying pipelines 29, the number of the water conveying pipelines 29 is consistent with that of the discharge pipes 9, and the water outlet end of each water conveying pipeline 29 is located at the upstream of the junction of the corresponding discharge pipe 9 and the compressed air system.
The dilution water tank 2 is used for introducing softened water into the discharge pipe 9 before entering the injection system 7 through a plurality of water conveying pipelines 29, SO that the injection system 7 is enabled to spray mist, and SO is enabled to be facilitated3And (4) removing.
A valve 30, a dilution water pump 31, a second flowmeter 32 and a pressure gauge 33 are sequentially arranged from the water inlet end to the water outlet end of each water conveying pipeline 29, a water return pipeline 34 is connected to each water conveying pipeline 29, the water inlet end of each water return pipeline 34 is located between the dilution water pump 31 and the second flowmeter 32, the water outlet end of each water return pipeline 34 is communicated with the dilution water tank 2 after being converged, and a third regulating valve 35 is arranged on each water return pipeline 34. The second flow meter 32 can be used to control the amount of demineralized water output to control the spray pattern emitted by the spray system.
Install sack cleaner 36 and charge level indicator 37 on the material holding vessel 1, the top of material holding vessel 1 is provided with feed inlet 38, and back taper pneumatic feeder 39 is installed to the bottom of material holding vessel 1, the output and the conveying mechanism intercommunication of back taper pneumatic feeder 39. The inverted cone pneumatic feeder 39 is favorable for discharging materials.
The conveying mechanism comprises a first conveying pipeline 40 and a second conveying pipeline 41, the feeding end of the first conveying pipeline 40 is communicated with the discharging end of the inverted-cone pneumatic feeder 39, the discharging end of the first conveying pipeline 40 is communicated with the feeding end of the weighing tank 42, the discharging end of the weighing tank 42 is communicated with the feeding end of the second conveying pipeline 41, the discharging end of the second conveying pipeline 41 is communicated with the feeding end of the exhaust hopper 43, the exhaust end of the exhaust hopper 43 is communicated with the material storage tank 1 through the air conveying pipeline 44, the discharging end of the exhaust hopper 43 is provided with a conveying rotary valve 56, the conveying rotary valve 56 is communicated with the feeding shoe 45, the air inlet end of the feeding shoe 45 is communicated with the air outlet end of the Roots blower 46, and the discharging end of the feeding shoe 45 is communicated with the dissolving tank 3 through a third conveying pipeline 47; a manual valve 48 and a pneumatic dome valve 49 are installed on the first conveying pipeline 40, the pneumatic dome valve 49 is installed at the feeding end of the weighing tank 42, a fluidizing device for preventing material accumulation can be arranged at the lower part of the weighing tank 42, and the manual valve 48 is arranged close to the inverted cone-shaped pneumatic feeder 39; a feeding rotary valve 50 is arranged on the second conveying pipeline 41; a sealing valve 51 is mounted on the third delivery line 47.
Before the materials enter the dissolving tank 3, the materials sequentially pass through the weighing tank 42, the exhaust hopper 43 and the feeding boot 45, the input amount of the materials is accurately controlled, and the preparation precision of the alkali liquor is ensured.
The compressed air system comprises a compressed air main pipe 53, an adsorption type dryer 54 and an air storage tank 55 which are connected in sequence, wherein the air storage tank 55 is connected with the discharge end of the discharge pipe 9 in a converging manner through an air transmission pipeline 52. The instrumentation and injection system 7 of the apparatus of the present application can be supplied with gas.
The injection system 7 comprises two groups of spray guns arranged on two sides of the flue, each group of spray guns comprises 6 spray guns, and the distance between the spray guns is reasonably set. Two-fluid spray guns can be selected, the spray particle size is 50 microns, the atomization angle is 15 degrees, and 1 gas flowmeter, 1 gas pressure gauge and 1 gas regulating valve can be respectively arranged on the gas transmission pipeline 52 in front of each spray gun.
When the equipment is started, firstly, the material in the material storage tank 1 is fed through the inverted cone-shaped pneumatic feeder 39, the pneumatic dome valve 49 acts according to the mass of the material in the weighing tank 42, the blanking is started when the mass is zero, the manual valve is closed when the mass reaches 500kg, the material is metered in the weighing tank 42, the rotating speed of the feeding rotary valve 56 is adjusted as required, the material is conveyed to the second conveying pipeline 41 through the conveying rotary valve 56, the gas brought by the rotation of the conveying rotary valve 56 is discharged to the material storage tank 1 through the exhaust hopper 43, the material is conveyed to the dissolving tank 3 through the Roots blower 46 at the upstream of the third conveying pipeline 47, and the sealing valve 51 is closed after the material is conveyed, so that water vapor is prevented from entering the material storage and conveying system; secondly, a water supply pump 27 is started to inject softened water into the dissolving tank 4, the softened water is heated to be above 30 ℃, a stirrer 15 is started after the materials enter the dissolving tank 4, the materials and the softened water are fully mixed in the dissolving tank 3 to prepare a concentrated solution which is easy to store, and after the values of a PH meter 8 and a densimeter 19 are stable, a transfer pump 22 is started to convey the concentrated solution to a storage tank 4; then, the delivery pump 11 and the dilution water pump 31 are started, the flow rates of the concentrated solution and the softened water are accurately controlled by using the first flow meter 12, the first regulating valve 14, the second flow meter 32 and the third regulating valve 35, the concentrated solution is diluted into a dilute solution with a required concentration, compressed air is subjected to dust removal and dehumidification by using the adsorption dryer 54, pressure maintaining is performed by using the air storage tank 55, the diluted solution and the prepared dilute solution are mixed at the spray gun, and finally the diluted solution is sprayed into the flues at two sides through the spray gun, and the regulating valves are respectively controlled according to the pressure and the flow rate value of gas and liquid at the inlet of each spray gun, so that the accurate control of the spray gun at each point is realized.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims (10)

1. Alkaline slurry injection SO that can accurate measurement is adjusted3A stripping apparatus, characterized in that the apparatus comprises:
the material storage and conveying system comprises a material storage tank (1) and a conveying mechanism communicated with the material storage tank (1);
the solution preparation metering system comprises a dilution water tank (2), a dissolving tank (3) and a storage tank (4), wherein the water outlet end of the dilution water tank (2) is communicated with the water inlet end of the dissolving tank (3) through a water outlet pipeline (5), the feed end of the dissolving tank (3) is communicated with the discharge end of a conveying mechanism, the discharge end of the dissolving tank (3) is communicated with the feed end of the storage tank (4) through a material conveying pipeline (6), the discharge end of the storage tank (4) is communicated with the feed ends of a plurality of discharge pipelines arranged in parallel, and the discharge end of each discharge pipeline is respectively connected with an injection system (7);
and the compressed air system is respectively communicated with the discharge end of each discharge pipeline.
The discharging pipeline comprises a plurality of discharging pipes (9) which are arranged in parallel, each discharging pipe (9) is sequentially provided with a first maintenance valve (10), a conveying pump (11) and a first flowmeter (12) from a feeding end to a discharging end, the feeding end of each discharging pipe (9) is communicated with the storage tank (4), and the discharging end of each discharging pipe (9) is converged with the air outlet end of the compressed air system and is connected with the corresponding injection system (7).
2. An apparatus for removing SO3 from alkaline slurry injection capable of precise metering and adjustment according to claim 1, wherein each discharge pipe (9) is connected with a first return pipe (13), the feeding end of the first return pipe (13) is located between a delivery pump (11) and a first flow meter (12), the discharging end of the first return pipe (13) is connected with the storage tank (4), and each first return pipe (13) is provided with a first adjusting valve (14).
3. The alkaline slurry injection SO3 removal equipment capable of realizing accurate metering and adjustment according to claim 1, wherein a stirrer (15) is arranged in the dissolving tank (3), an electric heater (16) is installed on the side wall of the dissolving tank (3), the top end of the dissolving tank (3) is communicated with an exhaust pipeline (17), an exhaust fan (18) is installed on the exhaust pipeline (17), and a densimeter (19), a thermometer (20) and a PH meter (8) are further installed on the dissolving tank (3).
4. The removal equipment for alkaline slurry injection SO3 capable of realizing accurate metering and adjustment according to claim 1, wherein a second maintenance valve (21) and a transfer pump (22) are sequentially installed from the feeding end to the discharging end of the material conveying pipeline (6), the material conveying pipeline (6) is further connected with a second material return pipe (23), the feeding end of the second material return pipe (23) is installed between the transfer pump (22) and the discharging end of the material conveying pipeline (6), the discharging end of the second material return pipe (23) is communicated with the dissolving tank (3), and a second adjusting valve (24) is installed on the second material return pipe (23).
5. The alkaline slurry injection SO3 removal equipment capable of realizing accurate metering and adjustment according to claim 1, wherein the water outlet pipeline (5) is provided with a third service valve (25) and a water supply pump (26) from the water inlet end to the water outlet end in sequence.
6. The alkaline slurry injection SO3 removal equipment capable of realizing accurate metering and adjustment according to claim 2, wherein the top end of the dilution water tank (2) is communicated with a softened water pipeline (27), a liquid level meter (28) is installed on the side wall of the dilution water tank (2), the dilution water tank (2) is further communicated with the discharge pipes (9) through a plurality of parallel water conveying pipelines (29), the number of the water conveying pipelines (29) is consistent with that of the discharge pipes (9), and the water outlet end of each water conveying pipeline (29) is located at the upstream of the junction of the corresponding discharge pipe (9) and the compressed air system.
7. The alkaline slurry injection SO3 removal device capable of achieving precise metering and adjustment according to claim 1, wherein a valve (30), a dilution water pump (31), a second flow meter (32) and a pressure gauge (33) are sequentially installed from a water inlet end to a water outlet end of each water conveying pipeline (29), a water return pipeline (34) is connected to each water conveying pipeline (29), the water inlet end of the water return pipeline (34) is located between the dilution water pump (31) and the second flow meter (32), the water outlet end of the water return pipeline (34) is communicated with the dilution water tank (2), and a third adjusting valve (35) is installed on the water return pipeline (34).
8. The alkaline slurry injection SO3 removing device capable of achieving accurate metering and adjustment according to claim 1, wherein a bag-type dust collector (36) and a level meter (37) are installed on the material storage tank (1), a feed inlet (38) is formed in the top end of the material storage tank (1), an inverted cone pneumatic feeder (39) is installed at the bottom end of the material storage tank (1), and the output end of the inverted cone pneumatic feeder (39) is communicated with the conveying mechanism.
9. The removal device for alkaline slurry injection SO3 capable of being precisely metered and adjusted according to claim 8, wherein the conveying mechanism comprises a first conveying pipeline (40) and a second conveying pipeline (41), the feeding end of the first conveying pipeline (40) is communicated with the discharging end of the inverted-cone-shaped pneumatic feeder (39), the discharging end of the first conveying pipeline (40) is communicated with the feeding end of the weighing tank (42), the discharging end of the weighing tank (42) is communicated with the feeding end of the second conveying pipeline (41), the discharging end of the second conveying pipeline (41) is communicated with the feeding end of the exhaust hopper (43), the exhaust end of the exhaust hopper (43) is communicated with the material storage tank (1) through an air conveying pipeline (44), the discharging end of the exhaust hopper (43) is provided with a conveying rotary valve (56), and the conveying rotary valve (56) is communicated with the feeding shoe (45), the air inlet end of the feeding boot (45) is communicated with the air outlet end of the Roots blower (46), and the material outlet end of the feeding boot (45) is communicated with the dissolving tank (3) through a third conveying pipeline (47); a manual valve (48) and a pneumatic dome valve (49) are mounted on the first conveying pipeline (40), the pneumatic dome valve (49) is mounted at the feeding end of the weighing tank (42), and the manual valve (48) is arranged close to the inverted cone-shaped pneumatic feeder (39); a feeding rotary valve (50) is arranged on the second conveying pipeline (41); and a sealing valve (51) is arranged on the third conveying pipeline (47).
10. The alkaline slurry injection SO3 removal equipment capable of realizing accurate metering and adjustment according to claim 2, wherein the compressed air system comprises a compressed air main pipe (53), an adsorption dryer (54) and an air storage tank (55) which are connected in sequence, and the air storage tank (55) is merged with the discharge end of the discharge pipe (9) through an air pipeline (52).
CN202111180389.9A 2021-10-11 2021-10-11 Alkaline slurry injection SO that can accurate measurement is adjusted3Removal equipment Pending CN114159960A (en)

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