CN113877416A - Boiler flue gas desulfurization and denitrification device - Google Patents

Boiler flue gas desulfurization and denitrification device Download PDF

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Publication number
CN113877416A
CN113877416A CN202111261102.5A CN202111261102A CN113877416A CN 113877416 A CN113877416 A CN 113877416A CN 202111261102 A CN202111261102 A CN 202111261102A CN 113877416 A CN113877416 A CN 113877416A
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flue gas
treatment cavity
wall
denitration
desulfurizing tower
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CN113877416B (en
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王侃
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Zhejiang Tianxiang Environmental Protection Equipment Co ltd
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Zhejiang Tianxiang Environmental Protection Equipment Co ltd
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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
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • 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
    • 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
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • 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
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/404—Nitrogen oxides other than dinitrogen oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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

Abstract

The invention discloses a boiler flue gas desulfurization and denitrification device, which relates to the field of desulfurization and denitrification devices and comprises a denitrification bin, a denitrification tower, a dust removal bin and a desulfurization tower, wherein first spraying pipelines are respectively arranged on two sides of the inner wall of the denitrification bin, heating plates are respectively arranged on two sides of the inner wall of the denitrification bin, an impeller rod is arranged on the inner wall of the denitrification bin through a rotating shaft, a first treatment cavity, a second treatment cavity and a discharge cavity are arranged in the denitrification tower, a first exhaust pipe is arranged between the top of one side of the denitrification bin and the first treatment cavity, a one-way air valve is arranged on the first exhaust pipe, a first partition plate is welded between the first treatment cavity and the second treatment cavity, a second partition plate is welded between the second treatment cavity and the discharge cavity, a first U-shaped connecting pipe is welded between the first treatment cavity and the second treatment cavity, a second U-shaped connecting pipe is welded between the second treatment cavity and the discharge cavity, and second spraying pipelines are respectively arranged on the inner walls of the first treatment cavity and the second treatment cavity, has the characteristic of thorough purification.

Description

Boiler flue gas desulfurization and denitrification device
Technical Field
The invention relates to the field of desulfurization and denitrification devices, in particular to a boiler flue gas desulfurization and denitrification device.
Background
The boiler is an energy converter, which is a device for heating working medium water or other fluids to certain parameters by using heat energy released by fuel combustion or other heat energy. The boiler can generate a large amount of polluting gases when in use, so the desulfurization and denitrification are one of important technical measures for preventing and controlling air pollution, the traditional denitrification modes are an SCNR (selective catalytic reduction) method and an SCR (selective catalytic reduction) method, the contact time between flue gas and a reducing agent is short in the common denitrification process, the reaction time is insufficient, and the same problems also exist in the desulfurization process, so a boiler flue gas desulfurization and denitrification device is needed to help solve the problems.
Disclosure of Invention
The invention aims to provide a boiler flue gas desulfurization and denitrification device to solve the problem of incomplete reaction in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a boiler flue gas desulfurization and denitrification device, which comprises a denitrification bin, a denitrification tower, a dedusting bin and a desulfurization tower, the two sides of the inner wall of the denitration bin are both provided with a first spraying pipeline, the two sides of the inner wall of the denitration bin are both provided with a heating plate, the inner wall of the denitration bin is provided with an impeller rod through a rotating shaft, a first treatment cavity, a second treatment cavity and a discharge cavity are arranged in the denitration tower, a first exhaust pipe is arranged between the top of one side of the denitration bin and the first treatment cavity, a one-way air valve is arranged on the first exhaust pipe, a first clapboard is welded between the first treatment cavity and the second treatment cavity, a second clapboard is welded between the second treatment cavity and the discharge cavity, a first U-shaped connecting pipe is welded between the first treatment cavity and the second treatment cavity, and a second U-shaped connecting pipe is welded between the second treatment cavity and the discharge cavity.
First process chamber with all install the second spray line on the inner wall of second process chamber, first process chamber with the catalyst mounting panel is all installed through the bolt in the second process chamber, the catalyst mounting panel sets up second spray line bottom, first reaction chamber with the inner wall both sides of second reaction chamber all are provided with the dashpot, the dashpot sets up catalyst mounting panel bottom, the dashpot inside callipers is equipped with the limiting plate, the limiting plate with the welding has spacing spring between the inner wall of dashpot, first U-shaped connecting pipe with second U-shaped connecting pipe top all sets up the dashpot central point puts.
The utility model discloses a denitration catalyst, including denitration tower, catalyst mounting panel, limiting plate, switching dish, catalyst mounting panel, limiting plate and switch group, all be provided with the through-hole in the first baffle of drive, the through-hole inside callipers is equipped with the dwang, the motor is installed through the bolt at denitration tower top, the dwang is installed on the output shaft of motor, the welding has the dish that opens and shuts on the dwang, the dish that opens and shuts is hugged closely catalyst mounting panel bottom, the catalyst mounting panel with it is provided with first fluting and second fluting respectively to open and shut on the dish, be provided with the control box on the desulfurizing tower, be provided with power, the control unit on the control box and switch group, the power pass through the electric wire with switch group connects, switch group pass through the electric wire with the motor is connected.
Preferably, a second exhaust pipe is arranged between the discharge cavity and the dust removal bin, and a third exhaust pipe is arranged between the dust removal bin and the desulfurizing tower.
Preferably, the third blast pipe has the welding in the baffle, be provided with the slotted hole on the baffle, slotted hole one side welding has the honeycomb duct, honeycomb duct one end sets up the inboard bottom of desulfurizing tower, install the pressure boost air pump through the bolt on the third blast pipe, the pressure boost air pump pass through the electric wire with the switch block is connected.
Preferably, be provided with the restriction kickboard in the desulfurizing tower, install the filter screen in the restriction kickboard, the inner wall both sides of desulfurizing tower all install the control box through the bolt.
Preferably, a control cavity is arranged in the control box, a through groove is formed in the bottom of the control cavity, a sealing sheet is clamped in the control cavity, a light floating rod is welded between the sealing sheet and the limiting floating plate, and the light floating rod is clamped in the through groove.
Preferably, pressure sensor is installed at the inner wall top in control chamber, liquid sensor is installed to restriction kickboard bottom, be provided with pilot lamp one and pilot lamp two on the control box, the power pressure sensor with liquid sensor all through the electric wire with the control unit is connected, the control unit pass through the electric wire respectively with pilot lamp one is connected with pilot lamp two.
Preferably, the control chamber with be provided with the atmospheric pressure balancing hole between the lateral wall of desulfurizing tower, the control unit includes controller and control switch, the controller includes the printed circuit mainboard and sets up microprocessor and the processing chip on the printed circuit mainboard, microprocessor and processing chip pass through the connection of electric lines.
Preferably, the inner wall both sides of desulfurizing tower all are provided with the mounting groove, the installation inslot card is equipped with removable current-limiting plate.
Preferably, the detachable flow limiting plate is internally provided with a flow limiting groove, and the inner wall of the desulfurizing tower is provided with a third spraying pipeline which corresponds to the flow limiting groove.
Preferably, the demister is welded to the top of the inner wall of the desulfurization tower, a discharge port is formed in the top of the desulfurization tower, and an air inlet pipe is arranged at the bottom of the other side of the denitration bin.
The invention has the technical effects and advantages that:
1. when the denitration device is used, multistage continuous denitration can be performed on flue gas through the denitration bin and the denitration tower, the flow of the flue gas can be retained for a short time according to an internal structure, the denitration process is more thorough compared with the traditional denitration mode, and denitration can be completed to the greatest extent.
2. When the double-layer desulfurization tower is used, the flue gas can be in closer contact with the limestone solution through the internal structure of the desulfurization tower, and the double-layer desulfurization structure is arranged, so that the flue gas is prevented from directly flowing from gaps, and the desulfurization effect is outstanding.
3. When the device is used, the liquid level of the limestone solution can be more conveniently checked through the internal structure of the desulfurizing tower, and the lighting conditions of the first indicator lamp and the second indicator lamp can be observed, so that the limestone solution can be conveniently added or discharged in time.
Drawings
Fig. 1 is a perspective view of the structure of the present invention.
FIG. 2 is a sectional view of a denitration bin of the structure of the present invention.
FIG. 3 is a sectional view of a denitration tower according to the present invention.
FIG. 4 is a cross-sectional view of a desulfurization tower constructed in accordance with the present invention.
Fig. 5 is a view of the portion of fig. 4 of the structure of the present invention.
Figure 6 is a cross-sectional view of a catalyst mounting plate of the inventive structure.
Fig. 7 is a perspective view of a removable restrictor plate constructed in accordance with the present invention.
FIG. 8 is a diagram of electrical connections of the structure of the present invention.
In the figure: 1. a denitration bin; 2. a denitration tower; 3. a dust removal bin; 4. a desulfurizing tower; 5. a first spray pipe; 6. heating plates; 7. a rotating shaft; 8. an impeller stem; 9. a first processing chamber; 10. a second processing chamber; 11. a discharge chamber; 12. a first exhaust pipe; 13. a one-way air valve; 14. a first separator; 15. a second separator; 16. a first U-shaped connecting pipe; 17. a second U-shaped connecting pipe; 18. a second spray pipe; 19. a catalyst mounting plate; 20. a buffer tank; 21. a limiting plate; 22. a limiting spring; 23. rotating the rod; 24. an opening and closing plate; 25. a first slot; 26. a second slot; 27. a control box; 28. a power source; 29. the device comprises a control unit, 30, a switch group, 31, a second exhaust pipe, 32, a third exhaust pipe, 33, an air inlet pipe, 34, a baffle, 35, a flow guide pipe, 36, a booster air pump, 37, a limiting floating plate, 38, a filter screen, 39, a control box, 40, a sealing sheet, 41, a light floating rod, 42, a pressure sensor, 43, a liquid sensor, 44, a first indicator lamp, 45, a second indicator lamp, 46, an air pressure balance hole, 47, a detachable flow limiting plate, 48, a flow limiting groove, 49, a third spraying pipeline, 50, a demister, 51 and a discharge port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a boiler flue gas desulfurization and denitrification device as shown in figures 1-8, which comprises a denitrification bin 1 and a denitrification tower 2, dust removal storehouse 3 and desulfurizing tower 4, first spray piping 5 is all installed to the inner wall both sides in denitration storehouse 1, hot plate 6 is all installed to the inner wall both sides in denitration storehouse 1, install impeller pole 8 through axis of rotation 7 on the inner wall in denitration storehouse 1, be provided with first process chamber 9 in the denitration tower 2, second process chamber 10 and emission chamber 11, install first blast pipe 12 between 1 one side top in denitration storehouse and the first process chamber 9, install one-way pneumatic valve 13 on the first blast pipe 12, the welding has first baffle 14 between first process chamber 9 and the second process chamber 10, the welding has second baffle 15 between second process chamber 10 and the emission chamber 11, the welding has first U-shaped connecting pipe 16 between first process chamber 9 and the second process chamber 10, the welding has second U-shaped connecting pipe 17 between second process chamber 10 and the emission chamber 11.
All install second spray pipe 18 on the inner wall of first process chamber 9 and second process chamber 10, all install catalyst mounting panel 19 through the bolt in first process chamber 9 and the second process chamber 10, catalyst mounting panel 19 sets up in second spray pipe 18 bottom, the inner wall both sides of first reaction chamber and second reaction chamber all are provided with dashpot 20, dashpot 20 sets up in catalyst mounting panel 19 bottom, the inside callipers of dashpot 20 are equipped with limiting plate 21, the welding has spacing spring 22 between limiting plate 21 and the inner wall of dashpot 20, first U-shaped connecting pipe 16 and the 17 top of second U-shaped connecting pipe all set up and put at dashpot 20 central point.
The catalyst mounting plate 19, the limiting plate 21 and the first driving partition plate 14 are all provided with through holes, a rotating rod 23 is clamped in the through holes, the top of the denitration tower 2 is provided with a motor through bolts, the rotating rod 23 is mounted on an output shaft of the motor, an opening-closing disk 24 is welded on the rotating rod 23, the opening-closing disk 24 is tightly attached to the bottom of the catalyst mounting plate 19, a first open slot 25 and a second open slot 26 are respectively arranged on the catalyst mounting plate 19 and the opening-closing disk 24, a control box 27 is arranged on the desulfurization tower 4, a power supply 28, a control unit 29 and a switch group 30 are arranged on the control box 27, the power supply 28 is connected with the switch group 30 through wires, the switch group 30 is connected with the motor through wires, a second exhaust pipe 31 is arranged between the exhaust cavity 11 and the dust removal cabin 3, a third exhaust pipe 32 is arranged between the dust removal cabin 3 and the desulfurization tower 4, a baffle 34 is welded in the third exhaust pipe 32, and a slotted hole is arranged on the baffle 34, and a guide pipe 35 is welded on one side of the slotted hole, one end of the guide pipe 35 is arranged at the bottom of the inner side of the desulfurizing tower 4, a pressurizing air pump 36 is installed on the third exhaust pipe 32 through a bolt, and the pressurizing air pump 36 is connected with the switch group 30 through an electric wire.
A limiting floating plate 37 is arranged in the desulfurizing tower 4, a filter screen 38 is arranged in the limiting floating plate 37, control boxes 39 are arranged on two sides of the inner wall of the desulfurizing tower 4 through bolts, a control cavity is arranged in each control box 39, a through groove is arranged at the bottom of the control cavity, a sealing sheet 40 is clamped in the control cavity, a light floating rod 41 is welded between the sealing sheet 40 and the limiting floating plate 37, the light floating rod 41 is clamped in the through groove, a pressure sensor 42 is arranged at the top of the inner wall of the control cavity, the pressure sensor 42 is arranged at the top of the inner wall of the control cavity, a liquid sensor 43 is arranged at the bottom of the limiting floating plate 37, an indicator lamp I44 and an indicator lamp II 45 are arranged on the control box 27, the power supply 28, the pressure sensor 42 and the liquid sensor 43 are all connected with the control unit 29 through electric wires, the control unit 29 is respectively connected with the indicator lamp I44 and the indicator lamp II 45 through electric wires, and an air pressure balance hole 46 is arranged between the control cavity and the outer side wall of the desulfurizing tower 4, the control unit 29 includes a controller and a control switch, the controller includes a printed circuit board, and a microprocessor and a processing chip which are disposed on the printed circuit board and connected by an electric wire.
The inner wall both sides of desulfurizing tower 4 all are provided with the mounting groove, and the mounting groove inside callipers is equipped with removable current-limiting plate 47, sets up current-limiting groove 48 in the removable current-limiting plate 47, installs third spray piping 49 on the inner wall of desulfurizing tower 4, and third spray piping 49 is corresponding with current-limiting groove 48, and the welding of the inner wall top of desulfurizing tower 4 has defroster 50, and desulfurizing tower 4 top is provided with discharge port 51, and 1 other side bottom in denitration storehouse is provided with intake pipe 33.
Example 1: multi-stage denitration
Including denitration storehouse 1, denitration tower 2, dust removal storehouse 3 and desulfurizing tower 4, first spray piping 5 is all installed to denitration storehouse 1's inner wall both sides, hot plate 6 is all installed to denitration storehouse 1's inner wall both sides, install impeller pole 8 through axis of rotation 7 on denitration storehouse 1's the inner wall, be provided with first process chamber 9 in the denitration tower 2, second process chamber 10 and emission chamber 11, install first blast pipe 12 between 1 one side top in denitration storehouse and the first process chamber 9, install one-way air valve 13 on the first blast pipe 12, the welding has first baffle 14 between first process chamber 9 and the second process chamber 10, second process chamber 10 and the welding has second baffle 15 between emission chamber 11, the welding has first U-shaped connecting pipe 16 between first process chamber 9 and the second process chamber 10, the welding has second U-shaped connecting pipe 17 between second process chamber 10 and the emission chamber 11.
All install second spray pipe 18 on the inner wall of first process chamber 9 and second process chamber 10, all install catalyst mounting panel 19 through the bolt in first process chamber 9 and the second process chamber 10, catalyst mounting panel 19 sets up in second spray pipe 18 bottom, the inner wall both sides of first reaction chamber and second reaction chamber all are provided with dashpot 20, dashpot 20 sets up in catalyst mounting panel 19 bottom, the inside callipers of dashpot 20 are equipped with limiting plate 21, the welding has spacing spring 22 between limiting plate 21 and the inner wall of dashpot 20, first U-shaped connecting pipe 16 and the 17 top of second U-shaped connecting pipe all set up and put at dashpot 20 central point.
The catalyst mounting plate 19, the limiting plate 21 and the first driving partition plate 14 are all provided with through holes, a rotating rod 23 is clamped in the through holes, the top of the denitration tower 2 is provided with a motor through bolts, the rotating rod 23 is mounted on an output shaft of the motor, an opening-closing disk 24 is welded on the rotating rod 23, the opening-closing disk 24 is tightly attached to the bottom of the catalyst mounting plate 19, a first open slot 25 and a second open slot 26 are respectively arranged on the catalyst mounting plate 19 and the opening-closing disk 24, a control box 27 is arranged on the desulfurization tower 4, a power supply 28, a control unit 29 and a switch group 30 are arranged on the control box 27, the power supply 28 is connected with the switch group 30 through wires, the switch group 30 is connected with the motor through wires, a second exhaust pipe 31 is arranged between the exhaust cavity 11 and the dust removal cabin 3, a third exhaust pipe 32 is arranged between the dust removal cabin 3 and the desulfurization tower 4, a baffle 34 is welded in the third exhaust pipe 32, and a slotted hole is arranged on the baffle 34, and a guide pipe 35 is welded on one side of the slotted hole, one end of the guide pipe 35 is arranged at the bottom of the inner side of the desulfurizing tower 4, a pressurizing air pump 36 is installed on the third exhaust pipe 32 through a bolt, and the pressurizing air pump 36 is connected with the switch group 30 through an electric wire.
When the denitration device is used, firstly, a special denitration catalyst is installed on the catalyst installation plate 19, flue gas is introduced into the denitration bin 1 through the gas inlet pipe 33, the heating plate 6 is started through the switch group 30, the temperature is adjusted to be 850-1050 ℃, ammonia water or urea is sprayed through the first spraying pipeline 5 to react with NOx, NOx is reduced to N2 so as to reduce the concentration, the flue gas can be blown to the impeller rod 8 to rotate in the introduction process, so that the flue gas can be more fully contacted with the ammonia water or the urea, the flue gas after preliminary denitration can enter the denitration tower 2 through the first exhaust pipe 12, ammonia gas is sprayed through the second spraying pipeline 18, the flue gas is contacted with the ammonia gas and can rapidly produce N2 under the catalytic action of the catalyst, so that the concentration can be reduced, the motor can drive the rotating rod 23 and the opening and closing disc 24 to slowly rotate in the reaction process, and as shown in figure 5, when the first slot 25 and the second slot 26 on the catalyst installation plate 19 and the opening and closing disc 24 are not overlapped, the flue gas can be retained Above catalyst mounting panel 19, thereby can increase reaction time, guarantee that the reaction is thorough, the flue gas can pass first fluting 25 and second fluting 26 and remove to the dish that opens and shuts 24 bottom when first fluting 25 coincides with second fluting 26, and can promote limiting plate 21 extrusion spacing spring 22 and move down along with atmospheric pressure increases, consequently, can further increase the residence time of flue gas, the flue gas can float and continuously react with the ammonia during the period, when limiting plate 21 is extruded to first U-shaped connecting pipe 16 bottom, flue gas after the reaction can enter into second treatment chamber 10 through first U-shaped connecting pipe 16 and repeat the aforesaid step and continue to react with the ammonia contact.
Example 2: dual desulfurization
A second exhaust pipe 31 is installed between the discharge cavity 11 and the dust removal bin 3, a third exhaust pipe 32 is installed between the dust removal bin 3 and the desulfurizing tower 4, a baffle 34 is welded in the third exhaust pipe 32, a slotted hole is formed in the baffle 34, a guide pipe 35 is welded on one side of the slotted hole, one end of the guide pipe 35 is arranged at the bottom of the inner side of the desulfurizing tower 4, a pressurizing air pump 36 is installed on the third exhaust pipe 32 through bolts, and the pressurizing air pump 36 is connected with the switch group 30 through an electric wire.
A limiting floating plate 37 is arranged in the desulfurizing tower 4, a filter screen 38 is arranged in the limiting floating plate 37, control boxes 39 are arranged on two sides of the inner wall of the desulfurizing tower 4 through bolts, a control cavity is arranged in each control box 39, a through groove is arranged at the bottom of the control cavity, a sealing sheet 40 is clamped in the control cavity, a light floating rod 41 is welded between the sealing sheet 40 and the limiting floating plate 37, the light floating rod 41 is clamped in the through groove, a pressure sensor 42 is arranged at the top of the inner wall of the control cavity, the pressure sensor 42 is arranged at the top of the inner wall of the control cavity, a liquid sensor 43 is arranged at the bottom of the limiting floating plate 37, an indicator lamp I44 and an indicator lamp II 45 are arranged on the control box 27, the power supply 28, the pressure sensor 42 and the liquid sensor 43 are all connected with the control unit 29 through electric wires, the control unit 29 is respectively connected with the indicator lamp I44 and the indicator lamp II 45 through electric wires, and an air pressure balance hole 46 is arranged between the control cavity and the outer side wall of the desulfurizing tower 4, the control unit 29 includes a controller and a control switch, the controller includes a printed circuit board, and a microprocessor and a processing chip which are disposed on the printed circuit board and connected by an electric wire.
The inner wall both sides of desulfurizing tower 4 all are provided with the mounting groove, and the mounting groove inside callipers is equipped with removable current-limiting plate 47, sets up current-limiting groove 48 in the removable current-limiting plate 47, installs third spray piping 49 on the inner wall of desulfurizing tower 4, and third spray piping 49 is corresponding with current-limiting groove 48, and the welding of the inner wall top of desulfurizing tower 4 has defroster 50, and desulfurizing tower 4 top is provided with discharge port 51, and 1 other side bottom in denitration storehouse is provided with intake pipe 33.
When the invention is used, firstly, a proper amount of limestone solution is injected into the desulfurizing tower 4, the liquid level is only required at the bottom of the pipe orifice of the third discharge pipe, the denitrated flue gas can enter the dedusting bin 3 through the second discharge pipe 31, the denitrated flue gas can enter the third discharge pipe 32 after dedusting, the flue gas can enter the limestone solution inside the desulfurizing tower 4 through the guide pipe 35 at one side of the baffle 34, and the flue gas is directly contacted with the limestone solution, so that sulfur dioxide in the flue gas and calcium carbonate oxidized air in the limestone solution are subjected to chemical reaction to remove the sulfur dioxide, thereby completing the desulfurization, the flue gas can move upwards, the limestone solution is sprayed through the third spraying pipe 49, the flow of the flue gas is limited when the flue gas enters the detachable flow limiting plate 47, when the flue gas moves in the flow limiting groove 48, the limestone solution sprayed by the third spraying pipe 49 is completely sprayed into the flow groove limit 48, thereby the desulfurization can be carried out again, and can ensure that the limestone solution can be fully contacted with the flue gas.
Example 3: limestone solution level detection
A limiting floating plate 37 is arranged in the desulfurizing tower 4, a filter screen 38 is arranged in the limiting floating plate 37, control boxes 39 are arranged on two sides of the inner wall of the desulfurizing tower 4 through bolts, a control cavity is arranged in each control box 39, a through groove is arranged at the bottom of the control cavity, a sealing sheet 40 is clamped in the control cavity, a light floating rod 41 is welded between the sealing sheet 40 and the limiting floating plate 37, the light floating rod 41 is clamped in the through groove, a pressure sensor 42 is arranged at the top of the inner wall of the control cavity, the pressure sensor 42 is arranged at the top of the inner wall of the control cavity, a liquid sensor 43 is arranged at the bottom of the limiting floating plate 37, an indicator lamp I44 and an indicator lamp II 45 are arranged on the control box 27, the power supply 28, the pressure sensor 42 and the liquid sensor 43 are all connected with the control unit 29 through electric wires, the control unit 29 is respectively connected with the indicator lamp I44 and the indicator lamp II 45 through electric wires, and an air pressure balance hole 46 is arranged between the control cavity and the outer side wall of the desulfurizing tower 4, the control unit 29 includes a controller and a control switch, the controller includes a printed circuit board, and a microprocessor and a processing chip which are disposed on the printed circuit board and connected by an electric wire.
The inner wall both sides of desulfurizing tower 4 all are provided with the mounting groove, and the mounting groove inside callipers is equipped with removable current-limiting plate 47, sets up current-limiting groove 48 in the removable current-limiting plate 47, installs third spray piping 49 on the inner wall of desulfurizing tower 4, and third spray piping 49 is corresponding with current-limiting groove 48, and the welding of the inner wall top of desulfurizing tower 4 has defroster 50, and desulfurizing tower 4 top is provided with discharge port 51, and 1 other side bottom in denitration storehouse is provided with intake pipe 33.
When the invention is used, the limiting floating plate 37 can detect the liquid level of limestone solution in the desulfurizing tower 4, under the condition of normal water level, as shown in figure 4, the limiting floating plate 37 can float above the limestone solution, the liquid sensor 43 can sense bottom liquid, therefore, the liquid sensor 43 can transmit liquid information to the control unit 29, the control unit 29 can trigger the indicator light II 45, the sealing sheet 40 can be pushed to move upwards by the light floating rod 41 when the limiting floating plate 37 floats upwards after the liquid level rises, when the sealing sheet 40 contacts the pressure sensor 42, the pressure sensor 42 can sense pressure information and transmit the pressure information to the control unit 29, the control unit 29 can trigger the indicator light I44, therefore, the invention can prompt that the liquid level in the inner part is too high and needs to be treated in time, when the liquid level is too low, the liquid level is at the bottom of the limiting floating plate 37, and the liquid sensor 43 at the bottom of the limiting floating plate 37 can not sense liquid information, therefore, the second indicator lamp 45 can be extinguished, so that the liquid level can be prompted to be too low, and the liquid level position can be known by observing the light emitting conditions of the first indicator lamp 44 and the second indicator lamp 45.
The working principle of the invention is as follows: when the denitration device is used, firstly, a special denitration catalyst is installed on the catalyst installation plate 19, flue gas is introduced into the denitration bin 1 through the gas inlet pipe 33, the heating plate 6 is started through the switch group 30, the temperature is adjusted to be 850-1050 ℃, ammonia water or urea is sprayed through the first spraying pipeline 5 to react with NOx, NOx is reduced to N2 so as to reduce the concentration, the flue gas can be blown to the impeller rod 8 to rotate in the introduction process, so that the flue gas can be more fully contacted with the ammonia water or the urea, the flue gas after preliminary denitration can enter the denitration tower 2 through the first exhaust pipe 12, ammonia gas is sprayed through the second spraying pipeline 18, the flue gas is contacted with the ammonia gas and can rapidly produce N2 under the catalytic action of the catalyst, so that the concentration can be reduced, the motor can drive the rotating rod 23 and the opening and closing disc 24 to slowly rotate in the reaction process, and as shown in figure 5, when the first slot 25 and the second slot 26 on the catalyst installation plate 19 and the opening and closing disc 24 are not overlapped, the flue gas can be retained Above the catalyst mounting plate 19, thereby increasing the reaction time and ensuring thorough reaction, when the first slot 25 and the second slot 26 are overlapped, the flue gas can pass through the first slot 25 and the second slot 26 and move to the bottom of the opening and closing disc 24, and can push the limiting plate 21 to extrude the limiting spring 22 and move downwards along with the increase of the air pressure, so that the residence time of the flue gas can be further increased, during the process, the flue gas can float and continuously react with ammonia, when the limiting plate 21 is extruded to the bottom of the first U-shaped connecting pipe 16, the flue gas after the reaction can enter the second processing chamber 10 through the first U-shaped connecting pipe 16 and repeat the above steps to continue to contact and react with the ammonia, the flue gas after denitration can enter the dedusting bin 3 through the second exhaust pipe 31, after dedusting is finished, the flue gas can enter the third exhaust pipe 32, and can enter the limestone solution inside the desulfurizing tower 4 through the guide pipe 35 on one side of the baffle 34, the flue gas is direct and the contact of limestone solution, consequently, the sulfur dioxide in the flue gas carries out the chemical reaction with the calcium carbonate oxidation air in the limestone solution and receives desorption sulfur dioxide, thereby can accomplish the desulfurization, later the flue gas can the rebound, spray limestone solution through third spray piping 49, the flue gas flows through by the restriction when getting into removable current-limiting plate 47, when removing in current-limiting groove 48, third spray piping 49 spun limestone solution spouts completely in current-limiting groove 48, thereby can carry out the desulfurization once more, and can guarantee that limestone solution can fully contact with the flue gas.
When the invention is used, the limiting floating plate 37 can detect the liquid level of limestone solution in the desulfurizing tower 4, under the condition of normal water level, as shown in figure 4, the limiting floating plate 37 can float above the limestone solution, the liquid sensor 43 can sense bottom liquid, therefore, the liquid sensor 43 can transmit liquid information to the control unit 29, the control unit 29 can trigger the indicator light II 45, the sealing sheet 40 can be pushed to move upwards by the light floating rod 41 when the limiting floating plate 37 floats upwards after the liquid level rises, when the sealing sheet 40 contacts the pressure sensor 42, the pressure sensor 42 can sense pressure information and transmit the pressure information to the control unit 29, the control unit 29 can trigger the indicator light I44, therefore, the invention can prompt that the liquid level in the inner part is too high and needs to be treated in time, when the liquid level is too low, the liquid level is at the bottom of the limiting floating plate 37, and the liquid sensor 43 at the bottom of the limiting floating plate 37 can not sense liquid information, therefore, the second indicator lamp 45 can be extinguished, so that the liquid level can be prompted to be too low, and the liquid level position can be known by observing the light emitting conditions of the first indicator lamp 44 and the second indicator lamp 45.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (10)

1. The utility model provides a boiler flue gas desulfurization denitrification facility, includes denitration storehouse (1), denitration tower (2), dust removal storehouse (3) and desulfurizing tower (4), its characterized in that: the denitration device is characterized in that first spraying pipelines (5) are installed on two sides of the inner wall of the denitration bin (1), heating plates (6) are installed on two sides of the inner wall of the denitration bin (1), impeller rods (8) are installed on the inner wall of the denitration bin (1) through rotating shafts (7), a first treatment cavity (9), a second treatment cavity (10) and a discharge cavity (11) are arranged in the denitration tower (2), a first exhaust pipe (12) is installed between the top of one side of the denitration bin (1) and the first treatment cavity (9), an one-way air valve (13) is installed on the first exhaust pipe (12), a first partition plate (14) is welded between the first treatment cavity (9) and the second treatment cavity (10), a second partition plate (15) is welded between the second treatment cavity (10) and the discharge cavity (11), and a first U-shaped connecting pipe (16) is welded between the first treatment cavity (9) and the second treatment cavity (10), a second U-shaped connecting pipe (17) is welded between the second treatment cavity (10) and the discharge cavity (11);
the inner walls of the first treatment cavity (9) and the second treatment cavity (10) are both provided with a second spraying pipeline (18), catalyst mounting plates (19) are arranged in the first treatment cavity (9) and the second treatment cavity (10) through bolts, the catalyst mounting plate (19) is arranged at the bottom of the second spray pipeline (18), buffer grooves (20) are arranged on both sides of the inner walls of the first reaction chamber and the second reaction chamber, the buffer tank (20) is arranged at the bottom of the catalyst mounting plate (19), a limiting plate (21) is clamped in the buffer groove (20), a limiting spring (22) is welded between the limiting plate (21) and the inner wall of the buffer groove (20), the tops of the first U-shaped connecting pipe (16) and the second U-shaped connecting pipe (17) are arranged at the central position of the buffer tank (20);
through holes are arranged in the catalyst mounting plate (19), the limiting plate (21) and the driving first clapboard (14), a rotating rod (23) is clamped in the through hole, a motor is arranged at the top of the denitration tower (2) through a bolt, the rotating rod (23) is arranged on an output shaft of the motor, an opening and closing disc (24) is welded on the rotating rod (23), the opening and closing disc (24) is tightly attached to the bottom of the catalyst mounting plate (19), a first open slot (25) and a second open slot (26) are respectively arranged on the catalyst mounting plate (19) and the opening and closing disc (24), the desulfurizing tower (4) is provided with a control box (27), the control box (27) is provided with a power supply (28), a control unit (29) and a switch group (30), the power supply (28) is connected with the switch group (30) through an electric wire, and the switch group (30) is connected with the motor through an electric wire.
2. The boiler flue gas desulfurization and denitrification apparatus according to claim 1, wherein: discharge chamber (11) with install second blast pipe (31) between dust removal storehouse (3), dust removal storehouse (3) with install third blast pipe (32) between desulfurizing tower (4).
3. The boiler flue gas desulfurization and denitrification apparatus according to claim 2, wherein: welded baffle (34) in third blast pipe (32), be provided with the slotted hole on baffle (34), slotted hole one side welding has honeycomb duct (35), honeycomb duct (35) one end sets up desulfurizing tower (4) inboard bottom, install pressure boost air pump (36) through the bolt on third blast pipe (32), pressure boost air pump (36) pass through the electric wire with switch group (30) are connected.
4. The boiler flue gas desulfurization and denitrification apparatus according to claim 1, wherein: be provided with restriction kickboard (37) in desulfurizing tower (4), install filter screen (38) in restriction kickboard (37), control box (39) are all installed through the bolt in the inner wall both sides of desulfurizing tower (4).
5. The boiler flue gas desulfurization and denitrification apparatus according to claim 4, wherein: be provided with the control chamber in control box (39), control chamber bottom is provided with logical groove, the control intracavity card is equipped with gasket (40), gasket (40) with it has light float stem (41) to fuse between restriction kickboard (37), light float stem (41) card is established logical inslot.
6. The boiler flue gas desulfurization and denitrification apparatus according to claim 5, wherein: pressure sensor (42) are installed at the inner wall top in control chamber, liquid sensor (43) are installed to restriction kickboard (37) bottom, be provided with pilot lamp (44) and pilot lamp two (45) on control box (27), power (28) pressure sensor (42) with liquid sensor (43) all through the electric wire with control unit (29) are connected, control unit (29) through the electric wire respectively with pilot lamp (44) and pilot lamp two (45) are connected.
7. The boiler flue gas desulfurization and denitrification apparatus according to claim 6, wherein: the control chamber with be provided with atmospheric pressure balancing hole (46) between the lateral wall of desulfurizing tower (4), control unit (29) include controller and control switch, the controller includes the printed circuit mainboard and sets up microprocessor and the processing chip on the printed circuit mainboard, microprocessor and processing chip pass through the connection of electric lines.
8. The boiler flue gas desulfurization and denitrification apparatus according to claim 1, wherein: the inner wall both sides of desulfurizing tower (4) all are provided with the mounting groove, the installation inslot card is equipped with removable current-limiting plate (47).
9. The boiler flue gas desulfurization and denitrification apparatus according to claim 8, wherein: a flow limiting groove (48) is formed in the detachable flow limiting plate (47), a third spraying pipeline (49) is installed on the inner wall of the desulfurizing tower (4), and the third spraying pipeline (49) corresponds to the flow limiting groove (48).
10. The boiler flue gas desulfurization and denitrification apparatus according to claim 1, wherein: the inner wall top welding of desulfurizing tower (4) has defroster (50), desulfurizing tower (4) top is provided with discharge port (51), denitration storehouse (1) other side bottom is provided with intake pipe (33).
CN202111261102.5A 2021-10-28 2021-10-28 Boiler flue gas desulfurization and denitrification device Active CN113877416B (en)

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CN117018813A (en) * 2023-09-06 2023-11-10 江苏泓寿生物工程有限公司 Paint spray booth exhaust treatment system based on lime powder cyclic adsorption pretreatment
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