CN204735100U - Absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler - Google Patents
Absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler Download PDFInfo
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- CN204735100U CN204735100U CN201520237369.4U CN201520237369U CN204735100U CN 204735100 U CN204735100 U CN 204735100U CN 201520237369 U CN201520237369 U CN 201520237369U CN 204735100 U CN204735100 U CN 204735100U
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- tower body
- oxidant
- denitration
- flue gas
- spray
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Abstract
The utility model provides an absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler includes denitrification facility, spray set, swirling flow board, defogging unit and oxidant supply equipment. Denitrification facility includes horizontal oxidation tower body and vertical absorption tower body, and the lower part outer wall of the former one end and vertical absorption tower body is the right angle and is connected, and the other end is flue gas inlet is equipped with the one end bottom lock of spray set and swirling flow board, vertical absorption tower body in to make its bottom form the tank, the other end be the exhanst gas outlet is equipped with spray set and defogging unit in, and just horizontal oxidation tower body and vertical absorption tower body by oxidation agent supply equipment provides the oxidant to spray set. Use the utility model discloses handle the back to the boiler flue gas, denitration efficiency is 75-83%. Based on the response characteristic in the oxidant tower body, provided to have unexpected effect such as oxidation such as hydrogen peroxide solution and the absorption system that absorbs nitrogen oxide in the flue gas, simple structure makes the denitration have more economic nature moreover to greatly reduced denitration cost.
Description
Technical field
The utility model relates to a kind of Denitration in Boiler device, more particularly, is about a kind of flue gas to chain-grate boiler carries out the absorption system of wet oxidation denitration.
Background technology
In to boiler smoke the harmful substance such as sulfur dioxide and nitrogen oxide NOx environmental protection treatment in, its traditional mode has three kinds, a kind ofly adopts independent desulfurization and dust arrester, a kind of desulphurization and denitration for combination and dust arrester, the third adopts independent denitrification apparatus.Here, independent desulfurization and dust arrester use the flue gas of Desulfurization Process by Alkali Solution Spray equipment to Industrial Boiler and various kiln to carry out desulfurization and dedusting in late nineteen nineties at home at first, can remove dust, particle and SO entrained in flue gas
2gas, obtain very good effect.The desulphurization and denitration of the combination of the second way and dust arrester are the combination units developed because environmental requirement promotes further in recent years, availablely on this device domestic market are generally high tower form, are now day by day improving through constantly improving effect.The third, i.e. independent denitrifying dedust apparatus, there are two class ways both at home and abroad at present, one class is that to adopt be separately denitration and the denitrification apparatus that manufactures and designs, such as US Patent No. 6146606A's, theme as associating SCR/SNCR method of denitration, specifically disclose carbon fuel and air burn in combustion furnace the flue gas that produces by spray gun spray in burner hearth alkali lye-urea liquid with in the burning of pretreatment oil burning boiler the nitrogen oxide NOx in discharge flue gas, then the nitrogen oxide remained in flue gas enters a special room and utilizes catalyst to carry out catalytic reduction reaction to reach the object of denitrating flue gas.In addition, also having a kind of " can select to adopt the method for non-catalytic reduction to the emission of oil burning boiler " as European patent EP 0426978A1 and above-mentioned United States Patent (USP) to remain institute's nitrogen-containing oxide method on processing in flue gas different, is the method and apparatus that some metals of employing and metal oxide make nitrogen oxide NOx directly be reduced by spray gun to injection reduction agent in burner hearth.But, this patented technology on denitration efficiency less than 70%, not high, for this reason, a kind for the treatment of apparatus with higher denitration dust collecting efficiency, structure more advantages of simple, new NO_x removal easy to use must be sought.
Summary of the invention
The purpose of this utility model is the deficiency existed in processing mode to supplement existing equipment for denitrifying flue gas, and proposes a kind of absorption system for carrying out wet oxidation denitration to the flue gas of combustion coal chain boiler low temperature.This is the denitration treatment system of the feature design according to the distribution of combustion coal chain boiler flue gas in burner hearth, temperature and flowing, it carries out the device of secondary flue gas denitration or the absorption system of wet oxidation denitration for a kind of oxidant spray atomizing that utilizes to discharging flue gas in above-mentioned boiler, and it has the treatment system of connection and reasonable arrangement, denitration governance efficiency that structure is reliable and high.
The technical scheme realizing above object is to provide the absorption system that a kind of flue gas to combustion coal chain boiler carries out wet oxidation denitration, comprise denitrification apparatus, denitration circulation liquid bath, the spray equipment be made up of pipeline and dress spray gun thereon, overflowing board, demisting unit, oxidant supply arrangement and chimney, wherein, denitrification apparatus comprises horizontal oxidation tower body and vertical absorption tower body, it is characterized in that: described one end of horizontal oxidation tower body is at right angles connected with the bottom outer wall of vertical absorption tower body and is connected, the other end is the gas approach being connected combustion coal chain boiler smoke exhaust pipe by pipeline, the bottom of one end of described vertical absorption tower body is closed, and make bottom it with under horizontal oxidation tower body along between the tank that forms a certain altitude and be connected by its underpart mounted valve and drainpipe and with denitration circulation liquid bath, the other end is connect the purifying smoke after denitrification apparatus denitration is discharged into chimney exhanst gas outlet by tube connector, in horizontal oxidation tower body, be provided with some layers of axially spaced-apart tandem spray equipment and overflowing board successively simultaneously, spray equipment and demisting unit that some layers of axially spaced-apart from bottom to top arrange successively is provided with in vertical absorption tower body, the outer wall of described horizontal oxidation tower body and vertical absorption tower body is also provided with by the interface providing oxidant as oxidant supply arrangement to described spray equipment.
Absorption system as previously discussed, wherein, described oxidant supply arrangement comprises oxidant storage tank, necessary supply regulates metering unit, described spray gun is spray atomizing spray gun, every one deck of described spray equipment has some rows, each row forms one group by several spray atomizing spray guns, and the mounting pipe of its each row's spray atomizing spray gun is occured simultaneously in described interface, and this interface then connects oxidant storage tank by pipeline.
Absorption system as previously discussed, wherein, described horizontal oxidation tower body and sleeping absorption tower body are all curling with corrosion resistant plate and through being welded to connect rectangular-shaped cylinder syndetons.
Absorption system as previously discussed, wherein, be provided with 1 to 3 layer of spray equipment and 1 to 2 piece of overflowing board in described horizontal oxidation tower body, described overflowing board is motorless swirling flow blower fan.
Absorption system as previously discussed, wherein, be provided with 1 to 3 layer of spray equipment and 1 to 2 demisting unit in described vertical oxidation tower body, described demisting unit is multilayer demist plate.
Absorption system as previously discussed, wherein, described spray atomizing spray gun has oxidant delivery outlet and air-out, and air-out provides the pressure air of 6-8 kg/cm by air compressor machine, is atomized with the oxidant exported by oxidant delivery outlet.
The denitration efficiency of described absorption system of the present utility model: 75 ~ 83%.For described denitration efficiency, NO
xconcentration of emission is by 400 mg/Nm
3be down to 100 mg/Nm
3below, the discharged nitrous oxides concentration after chain-grate boiler denitration is made to meet the discharge standard of " fossil-fuel power plant atmospheric pollutant emission standard " (BG13223-2011) emission limits of nitrogen oxides 100 milligrams/cubic metre.
Therefore, based on the response characteristic of above-mentioned oxidant at horizontal oxidation tower body and vertical absorption tower body, propose the denitration treatment system of oxidation and absorption nitrogen oxides in effluent, tool has an unexpected effect, and there is the simple and manufacturing price of structure make the denitration of boiler have more selective and economy, greatly to reduce denitration cost relative to oxidants such as other Oxidizing and Reducing Agents denitrification apparatus selection hydrogen peroxide inexpensively.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of denitrification apparatus in the utility model;
Fig. 2 is the layout schematic diagram of oxidant supply arrangement and denitration circulation liquid bath in the utility model;
Fig. 3 is the schematic diagram of atomizer in the utility model.
Detailed description of the invention
Refer to Fig. 1 to Fig. 3, there is shown the absorption system that the flue gas to combustion coal chain boiler of the present utility model carries out wet oxidation denitration, this system comprises denitrification apparatus 1, denitration circulation liquid bath 2, the spray equipment 3 be made up of pipeline 31 and dress spray gun 32 thereon, overflowing board 4, demisting unit 5, oxidant supply arrangement 6 and chimney 7, wherein, denitrification apparatus 1 comprises horizontal oxidation tower body 11 and vertical absorption tower body 12, among: one end of described horizontal oxidation tower body 11 is at right angles connected with the bottom outer wall of vertical absorption tower body 12 and is connected or through, the other end is be connected by the flange 1111 on gas approach 111 by the gas approach 111(boiler exhaust gas pipe of pipeline connection combustion coal chain boiler smoke exhaust pipe), the bottom of the one end on described vertical absorption tower 12 is closed, and make the tank 122 that forms a certain altitude bottom it between 121 with horizontal oxidation tower body 11 times edges and be connected by its underpart mounted valve and drainpipe 124 and with denitration circulation liquid bath 2, the other end is that the exhanst gas outlet 123(chimney 7 that the purifying smoke of connection after denitrification apparatus denitration is discharged into chimney by tube connector is connected with the flange 1231 on exhanst gas outlet 123 by pipeline), in horizontal oxidation tower body 11, be provided with some layers of axially spaced-apart tandem spray equipment 3 and overflowing board 4 successively simultaneously, spray equipment 3 and demisting unit 5 that some layers of axially spaced-apart from bottom to top arrange successively is provided with in vertical absorption tower body 12, the outer wall of described horizontal oxidation tower body 11 and vertical absorption tower body 12 is also provided with by the interface 115 and 125 providing oxidant as oxidant supply arrangement 6 to described spray equipment 3.In addition, described horizontal oxidation tower body 11 and vertical absorption tower body 12 are built repeatedly by masonry or Plate Welding rear inner lining anti-corrosion material forms, and its light plate preferably adopts stainless steel, cylindrically or rectangular cubic.In the present embodiment, they are the rectangular-shaped syndetons of curling with stainless-steel sheet and through being welded to connect cylinder.
Oxidant storage tank 61 drawn together by described oxidant supply arrangement bag 6, the supply of necessary oxidant regulates metering unit 62, wherein, oxidant storage tank 61 adopt market can have been bought oxidant is housed, the such as storage tank of sodium sulfite, sodium chlorite, hydrogen peroxide, sodium peroxydisulfate etc., the oxidant that is described oxidant supply arrangement provides is hydrogen peroxide, sodium sulfite, sodium chlorite or sodium peroxydisulfate; Necessary oxidant supply regulates metering unit 62 to comprise dosing pump, flowmeter, Pressure gauge and control valve.
Every one deck of described spray equipment 3 has some rows, and each row forms one group by several spray guns, and the mounting pipe of its each row's spray gun is occured simultaneously in described interface 115,125, and these interfaces then all connect oxidant storage tank 61 by pipeline.Described spray gun 32 is spray atomizing spray gun.
In a preferred embodiment, be provided with 1 to 3 layer of spray equipment and 1 to 2 piece of overflowing board 4 in described horizontal oxidation tower body 11, described overflowing board is motorless swirling flow blower fan.In described vertical oxidation tower body, be provided with 1 to 3 layer of spray equipment and 1 to 2 demisting unit 5, described demisting unit is multilayer demist plate.
The concentration of described oxidant is 8-20% weight percent, described spray gun 32 has oxidant delivery outlet and air-out, air-out provides the pressure air of 6-8 kg/cm by air compressor machine, is atomized with the oxidant exported by oxidant delivery outlet.When in alarm set 1, flue gas carries out wet oxidation denitration, the denitration utilization rate of oxidant can be significantly improved.
In the processing procedure of denitrification apparatus of the present utility model be: flue gas enters in horizontal oxidation tower body 11 from gas approach 111 and carries out denitration through spray equipment and overflowing board 4, flue gas after above process flows to duct, vertical oxidation tower body 12 bottom 1112 from the rear portion of horizontal oxidation tower body 11, enter vertical oxidation tower body 12 top more from bottom to up, interiorly carry out denitration, demist through spray equipment 3 and demisting unit 5.In horizontal oxidation tower body 11 and vertical absorption tower body 12, the oxidizing agent solution that will contain about 15% seen by spray equipment, also two oxidant supply arrangements 6 can be used if desired to provide different oxidizing agent solution concentration to horizontal oxidation tower body 11 and vertical oxidation tower body 12 lance ejection, spray from spray gun 32, in above-mentioned tower body, form fog layer and efficient absorption will be carried out to nitrogen oxide, meanwhile oxidant is also to sulfur dioxide or the auxiliary desulfurization of do of process, and therefore the denitration utilization rate of oxidant can be increased.Its reaction is as follows:
NO+H
2o
2(liquid phase) → NO
2+ H
2o
2NO
2+ H
2o
2(liquid phase) → 2HNO
3
2NO+ H
2o
2(liquid phase) → 2HNO
2
SO
2+ H
2o
2(liquid phase) → H
2sO
4
Flue gas in horizontal oxidation tower body after oxidizing agent solution process fully will to be mixed with oxidizer treatment solution flow into tank 122 by flowing through some particles and dust that flue gas carries secretly from tower body by the unpowered swirling flow blower fan that is arranged in the overflowing board 4 at spray equipment 3 rear portion.
Flue gas in vertical oxidation tower body after oxidizing agent solution process will by being arranged in the multilayer demist plate of the demisting unit above spray equipment 3 to remove flue gas steam, fog and tiny micronic dust.Steam is condensed further, and processed flue gas makes flowing velocity suitably reduce because of expansion, finally from the exhanst gas outlet 123 being positioned at this top, room, treated purifying smoke is discharged into outer exhaust duct until chimney 7.
After whole processing procedure completes, through detecting, denitration efficiency 75 one 83%.In addition, also because denitrification apparatus is not perishable, also there is longer advantage in service life.
Claims (6)
1. the flue gas to combustion coal chain boiler carries out the absorption system of wet oxidation denitration, comprise denitrification apparatus, denitration circulation liquid bath, the spray equipment be made up of pipeline and dress spray gun thereon, overflowing board, demisting unit, oxidant supply arrangement and chimney, wherein, denitrification apparatus comprises horizontal oxidation tower body and vertical absorption tower body, it is characterized in that: described one end of horizontal oxidation tower body is at right angles connected with the bottom outer wall of vertical absorption tower body and is connected, the other end is the gas approach being connected combustion coal chain boiler smoke exhaust pipe by pipeline, the bottom of one end of described vertical absorption tower body is closed, and make bottom it with under horizontal oxidation tower body along between the tank that forms a certain altitude and be connected by its underpart mounted valve and drainpipe and with denitration circulation liquid bath, the other end is connect the purifying smoke after denitrification apparatus denitration is discharged into chimney exhanst gas outlet by tube connector, in horizontal oxidation tower body, be provided with some layers of axially spaced-apart tandem spray equipment and overflowing board successively simultaneously, spray equipment and demisting unit that some layers of axially spaced-apart from bottom to top arrange successively is provided with in vertical absorption tower body, the outer wall of described horizontal oxidation tower body and vertical absorption tower body is also provided with by the interface providing oxidant as oxidant supply arrangement to described spray equipment.
2. absorption system as claimed in claim 1, it is characterized in that, described oxidant supply arrangement comprises oxidant storage tank, supply regulates metering unit, described spray gun is spray atomizing spray gun, every one deck of described spray equipment has some rows, each row forms one group by several spray atomizing spray guns, and the mounting pipe of its each row's spray atomizing spray gun is occured simultaneously in described interface, and this interface then connects oxidant storage tank by pipeline.
3. absorption system as claimed in claim 1, it is characterized in that, described horizontal oxidation tower body and sleeping absorption tower body are all curling with corrosion resistant plate and through being welded to connect rectangular-shaped cylinder syndetons.
4. absorption system as claimed in claim 1, it is characterized in that, be provided with 1 to 3 layer of spray equipment and 1 to 2 piece of overflowing board in described horizontal oxidation tower body, described overflowing board is motorless swirling flow blower fan.
5. absorption system as claimed in claim 1, it is characterized in that, be provided with 1 to 3 layer of spray equipment and 1 to 2 demisting unit in described vertical oxidation tower body, described demisting unit is multilayer demist plate.
6. absorption system as claimed in claim 1, it is characterized in that, described spray atomizing spray gun has oxidant delivery outlet and air-out, and air-out provides the pressure air of 6-8 kg/cm by air compressor machine, is atomized with the oxidant exported by oxidant delivery outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520237369.4U CN204735100U (en) | 2015-04-20 | 2015-04-20 | Absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520237369.4U CN204735100U (en) | 2015-04-20 | 2015-04-20 | Absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler |
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| Publication Number | Publication Date |
|---|---|
| CN204735100U true CN204735100U (en) | 2015-11-04 |
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|---|---|---|---|
| CN201520237369.4U Expired - Fee Related CN204735100U (en) | 2015-04-20 | 2015-04-20 | Absorption system who carries out wet process oxidation denitration to flue gas of coal -fired chain boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817096A (en) * | 2016-05-14 | 2016-08-03 | 芜湖万向新元环保科技有限公司 | Horizontal type waste gas treating equipment |
| CN106925097A (en) * | 2017-04-28 | 2017-07-07 | 陶汉中 | It is a kind of based on liquid phase oxidation to the combined column and its technique of flue gas desulfurization and denitrification |
| CN110090546A (en) * | 2019-05-30 | 2019-08-06 | 江苏新聚环保科技有限公司 | Emission-control equipment |
| CN113209797A (en) * | 2021-05-14 | 2021-08-06 | 上海天晓环保工程有限公司 | Low-temperature flue gas denitration device |
| CN113599980A (en) * | 2021-08-25 | 2021-11-05 | 温州宏泽热电股份有限公司 | Flue gas treatment system of circulating fluidized bed boiler |
-
2015
- 2015-04-20 CN CN201520237369.4U patent/CN204735100U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817096A (en) * | 2016-05-14 | 2016-08-03 | 芜湖万向新元环保科技有限公司 | Horizontal type waste gas treating equipment |
| CN106925097A (en) * | 2017-04-28 | 2017-07-07 | 陶汉中 | It is a kind of based on liquid phase oxidation to the combined column and its technique of flue gas desulfurization and denitrification |
| CN110090546A (en) * | 2019-05-30 | 2019-08-06 | 江苏新聚环保科技有限公司 | Emission-control equipment |
| CN113209797A (en) * | 2021-05-14 | 2021-08-06 | 上海天晓环保工程有限公司 | Low-temperature flue gas denitration device |
| CN113599980A (en) * | 2021-08-25 | 2021-11-05 | 温州宏泽热电股份有限公司 | Flue gas treatment system of circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20170420 |