CN110801729A - Boiler flue gas ammonia desulfurization oxidation air distribution system - Google Patents
Boiler flue gas ammonia desulfurization oxidation air distribution system Download PDFInfo
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- CN110801729A CN110801729A CN201911112109.3A CN201911112109A CN110801729A CN 110801729 A CN110801729 A CN 110801729A CN 201911112109 A CN201911112109 A CN 201911112109A CN 110801729 A CN110801729 A CN 110801729A
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- oxidation air
- oxidation
- pipe
- air distribution
- flue gas
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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
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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
- B01D53/46—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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/245—Preparation from compounds containing nitrogen and sulfur
- C01C1/246—Preparation from compounds containing nitrogen and sulfur from sulfur-containing ammonium compounds
- C01C1/247—Preparation from compounds containing nitrogen and sulfur from sulfur-containing ammonium compounds by oxidation with free oxygen
-
- 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)
- 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)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an ammonia desulfurization and oxidation air distribution system for boiler flue gas, which comprises an oxidation Roots blower, an oxidation air pipe and an oxidation air distribution pipe, wherein the outlet of the oxidation Roots blower is communicated with the inlet of the oxidation air pipe, and the inlet of the oxidation air pipe is provided with an oxidation air pipe valve; a nonmetal expansion joint is additionally arranged between the oxidation Roots blower and the oxidation air pipe valve; outlets of the oxidation air pipes are connected with four oxidation air pipe distribution pipes through flanges, and outlets of the four oxidation air pipe distribution pipes are positioned inside the desulfurizing tower; and the oxidizing air distributing pipe is also welded with an oxidizing air exhaust pipe. According to the invention, the existing desulfurization oxidation section is improved, so that ammonium sulfite in slurry at the bottom of the desulfurization tower is fully and thoroughly oxidized to achieve crystallization saturation of ammonium sulfate and form ammonium sulfate slurry with solid content of 6%, thereby solving the problems that the oxidation of ammonium sulfite in boiler flue gas ammonia desulfurization is not thorough, a grain fine centrifuge cannot be separated out, and the environmental protection, standard discharge and safe operation of boiler desulfurization are influenced.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a boiler flue gas ammonia desulphurization oxidation air distribution system.
Background
In the ultralow emission production process of boiler flue gas ammonia process desulfurization, the aqueous ammonia that adds in the oxidation tank is sent into the desulfurizing tower by the one-level circulating pump, absorb the sulfur dioxide ammonium sulfite in the flue gas, the ammonium sulfite solution flows back to the oxidation tank through the back flow that sets up at the absorption section, the abundant oxidation of oxidation air that is distributed evenly by the multilayer in oxidation tank lower part becomes ammonium sulfate solution, still have a small amount of ammonium sulfite oxidation and do not thoroughly get into the desulfurizing tower bottom, influence the crystallization of the thick liquid at the bottom of the desulfurizing tower, make the thin centrifuge of thick liquid crystal particle size can't leave, influence the environmental protection of desulfurizing tower and discharge up to.
Disclosure of Invention
The invention provides an ammonia desulphurization oxidation air distribution system for boiler flue gas, aiming at solving the defects of the prior art, and the invention provides an ammonia desulphurization oxidation air distribution system for boiler flue gas, wherein the ammonium sulfite in the slurry at the bottom of a desulfurizing tower is fully and thoroughly oxidized by improving the prior desulphurization oxidation section so as to achieve the crystallization saturation of ammonium sulfate and form ammonium sulfate slurry with the solid content of 6 percent, thereby solving the problems that the ammonium sulfite in the ammonia desulphurization of boiler flue gas is not thoroughly oxidized, a grain fine centrifuge cannot be separated out, and the environmental protection, standard emission and safe operation of boiler desulphurization are influenced.
In order to achieve the purpose, the invention provides the following technical scheme:
an ammonia desulfurization and oxidation air distribution system for boiler flue gas comprises an oxidation Roots blower, an oxidation air pipe and an oxidation air distribution pipe, wherein the outlet of the oxidation Roots blower is communicated with the inlet of the oxidation air pipe, and the inlet of the oxidation air pipe is provided with an oxidation air pipe valve; a nonmetal expansion joint is additionally arranged between the oxidation Roots blower and the oxidation air pipe valve; outlets of the four oxidation air distribution pipes are positioned inside the desulfurizing tower and are distributed at equal intervals from top to bottom inside the desulfurizing tower; and the oxidizing air distributing pipe is also welded with an oxidizing air exhaust pipe.
The above boiler flue gas ammonia desulfurization oxidation air distribution system, preferred scheme is, oxidation wind distributing pipe is 2 meters bottom the desulfurization tower.
According to the above boiler flue gas ammonia desulfurization oxidation air distribution system, the preferable scheme is that double rows of holes are drilled at the bottom of the oxidation air distribution pipe, the diameter of each hole is 10mm, and the distance between the holes is 0.25 m.
The above boiler flue gas ammonia desulfurization oxidation air distribution system has the preferable scheme that the oxidation air exhaust and purification pipe is welded at a position 0.15m away from the outlet of the oxidation air distribution pipe.
The above boiler flue gas ammonia desulfurization oxidation air distribution system preferably has the oxidation air pipe being 304 pipes with a diameter of 159 mm by 5 mm.
The above boiler flue gas ammonia desulfurization oxidation air distribution system has the preferable scheme that the oxidation air distribution pipe is 2507 pipes with the diameter of 76 x 4 mm.
The above boiler flue gas ammonia desulfurization oxidation air distribution system preferably has the oxidation air exhaust pipe being 2507 pipe with diameter of 45 × 4 mm.
Above-mentioned boiler flue gas ammonia process desulfurization oxidation air distribution system, preferred scheme is, the length of oxidation wind exhaust pipe is 0.8 m.
The invention has the beneficial effects that:
according to the boiler flue gas ammonia desulfurization oxidation air distribution system provided by the invention, the existing desulfurization oxidation section is improved, so that ammonium sulfite which is not completely oxidized in slurry at the bottom of a desulfurization tower is continuously and fully oxidized into ammonium sulfate solution by oxidized air, and the problems that ammonium sulfate crystal grains are fine, a centrifugal machine cannot be separated out, and boiler desulfurization cannot reach the standard, discharge is realized, and safe operation is protected are solved.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
FIG. 1 is a structural diagram of an ammonia desulfurization and oxidation air distribution system for boiler flue gas according to the present invention.
In the figure, a 1-oxidation Roots blower, a 2-nonmetal expansion joint, a 3-oxidation air pipe valve, a 4-oxidation air pipe, a 5-flange, a 6-oxidation air distribution pipe and a 7-oxidation air exhaust pipe are arranged.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
embodiment 1 referring to fig. 1, a boiler flue gas ammonia desulfurization and oxidation air distribution system comprises an oxidation roots blower 1, an oxidation air duct 4 and an oxidation air distribution duct 6, wherein an outlet of the oxidation roots blower 1 is communicated with an inlet of the oxidation air duct 4, and an inlet of the oxidation air duct 4 is provided with an oxidation air duct valve 3; a nonmetal expansion joint 2 is additionally arranged between the oxidation Roots blower 1 and the oxidation air pipe valve 3; the outlets of the oxidation air pipes 4 are connected with four oxidation air pipe air distribution pipes 6 through flanges, and the outlets of the four oxidation air pipe air distribution pipes 6 are positioned inside the desulfurization tower and are distributed at equal intervals from top to bottom inside the desulfurization tower; and the oxidation air distribution pipe 6 is also welded with an oxidation air exhaust pipe 7, wherein the oxidation air distribution pipe 6 is 2 meters away from the bottom of the desulfurization tower. The bottom of the oxidation air distribution pipe 6 is drilled with double rows of holes, the diameter of each hole is 10mm, and the distance between every two holes is 0.25 m; the oxidation air exhaust pipe 7 is welded at a position 0.15m away from the outlet of the oxidation air distributing pipe 6.
Specifically, the oxidation air duct 4 is 304 ducts with a diameter of 159 × 5mm, the oxidation air distribution duct 6 is 2507 ducts with a diameter of 76 × 4mm, the oxidation air exhaust duct 7 is 2507 ducts with a diameter of 45 × 4mm, and the length of the oxidation air exhaust duct 7 is 0.8 m.
After the boiler flue gas ammonia desulfurization tower operates, when crystal particles exist at the bottom of the desulfurization tower through sampling detection, an oxidation Roots blower 1 and an oxidation air pipe valve 3 are opened, the outlet pressure is controlled to be 0.03-0.04MPa, air is blown to an oxidation air distribution pipe 6 at the bottom of the desulfurization tower, oxidation air is distributed to four oxidation air distribution pipes 6 through oxidation air pipes 4, phi 10 double-row holes are drilled at the bottom of the tower to blow in slurry at the bottom of the tower, ammonium sulfite in the slurry at the bottom of the desulfurization tower is fully and thoroughly oxidized to reach the crystallization saturation of ammonium sulfate, ammonium sulfate slurry with the solid content of 6% is formed, and the problems that the oxidation of ammonium sulfite in the boiler flue gas ammonia desulfurization is incomplete, a crystal grain fine centrifuge cannot be separated out, and the environment-friendly standard emission safety.
One set of novel boiler flue gas ammonia process desulfurization oxidation air distribution system invests 50000 yuan, compares than the technology that does not use desulfurization oxidation air distribution system, has both solved ammonia process desulfurization ammonium sulfite oxidation thoroughly not the ejection of compact influence environmental protection discharge problems up to standard, can make the whole productions of the ammonium sulfate of byproduct create the benefit again, and every set of live time 3 years has created very big benefit for the enterprise.
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (8)
1. A boiler flue gas ammonia desulfurization oxidation air distribution system comprises an oxidation Roots blower, an oxidation air pipe and an oxidation air distribution pipe, and is characterized in that an outlet of the oxidation Roots blower is communicated with an inlet of the oxidation air pipe, and an oxidation air pipe valve is arranged at the inlet of the oxidation air pipe; a nonmetal expansion joint is additionally arranged between the oxidation Roots blower and the oxidation air pipe valve; outlets of the four oxidation air distribution pipes are positioned inside the desulfurizing tower and are distributed at equal intervals from top to bottom inside the desulfurizing tower; and the oxidizing air distributing pipe is also welded with an oxidizing air exhaust pipe.
2. The boiler flue gas ammonia desulfurization oxidation air distribution system of claim 1, wherein the oxidation air distribution pipe is 2 meters away from the bottom of the desulfurization tower.
3. The boiler flue gas ammonia desulfurization oxidation air distribution system according to claim 1, wherein the bottom of the oxidation air distribution pipe is drilled with two rows of holes, the diameter of each hole is 10mm, and the distance between every two holes is 0.25 m.
4. The boiler flue gas ammonia desulfurization oxidation air distribution system according to claim 1, wherein the oxidation air exhaust pipe is welded at a position 0.15m away from the outlet of the oxidation air distribution pipe.
5. The boiler flue gas ammonia desulfurization oxidation air distribution system of claim 1, wherein the oxidation air pipe is 304 pipes with the diameter of 159 mm by 5 mm.
6. The boiler flue gas ammonia desulfurization oxidation air distribution system according to claim 1, wherein the oxidation air distribution pipe is 2507 pipe with diameter of 76 x 4 mm.
7. The boiler flue gas ammonia desulfurization oxidation air distribution system of claim 1, wherein the oxidation air exhaust pipe is 2507 pipe with a diameter of 45 x 4 mm.
8. The boiler flue gas ammonia desulfurization oxidation air distribution system of claim 7, wherein the length of the oxidation air exhaust pipe is 0.8 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911112109.3A CN110801729A (en) | 2019-11-14 | 2019-11-14 | Boiler flue gas ammonia desulfurization oxidation air distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911112109.3A CN110801729A (en) | 2019-11-14 | 2019-11-14 | Boiler flue gas ammonia desulfurization oxidation air distribution system |
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| Publication Number | Publication Date |
|---|---|
| CN110801729A true CN110801729A (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911112109.3A Pending CN110801729A (en) | 2019-11-14 | 2019-11-14 | Boiler flue gas ammonia desulfurization oxidation air distribution system |
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| CN (1) | CN110801729A (en) |
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2019
- 2019-11-14 CN CN201911112109.3A patent/CN110801729A/en active Pending
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