CN105413458A - Membrane-type wall tube screen smoke exhaust port and flue gas mixing method - Google Patents
Membrane-type wall tube screen smoke exhaust port and flue gas mixing method Download PDFInfo
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- CN105413458A CN105413458A CN201510984112.XA CN201510984112A CN105413458A CN 105413458 A CN105413458 A CN 105413458A CN 201510984112 A CN201510984112 A CN 201510984112A CN 105413458 A CN105413458 A CN 105413458A
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- flue gas
- flue
- membrane
- membrane panel
- wall tube
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A membrane-type wall tube screen smoke exhaust port and a flue gas mixing method. With development of electric power industry in our country, emission load of NOx is increased. For reducing the emission load of the NOx, power plants all employ denitration devices for treating flue gas, wherein SCR denitration technology is highly valued and is widely applied in the electric power industry. In our country, when a coal-fired set is operated at low load, the temperature of flue gas in an inlet of an SCR device is often lower than an optimum reaction temperature of an SCR catalyst, and even is lower than a normal reaction temperature, and as a result, the device is poor in denitration effects and the flue gas cannot reach emission standard even through denitration with the device. According to the invention, a smoke exhaust port (2) is arranged on a membrane-type wall tube screen (1). An anti-wear board (3) is arranged on the membrane-type wall tube screen. A sealing block (4) is arranged on the membrane-type wall tube screen. A sealing plate (5) is installed on the membrane-type wall tube screen and is connected to a flue. The smoke exhaust port is used for exhausting flue gas from the membrane-type wall tube screen at a back flue.
Description
technical field:
the present invention relates to a kind of membrane panel smoking mouth device and mixed flue gas method.
background technology:
along with the development of China's power industry, NO
x
discharge capacity grow with each passing day, the NO in air
x
being not only the main source that photochemical fog is formed, is also the main Crack cause that acid rain appears in all parts of the country.According to China's power planning, estimate 2015-2020, NO
x
discharge capacity will more than SO
2
discharge capacity, becomes the first acid contaminant of China.Therefore, country forcibly administers the NO of thermal power plant by regulation
x
discharge capacity.In order to reduce NO
x
discharge capacity, power plant installs out of stock device one after another additional and processes flue gas, wherein SCR denitration technology is high with its removal efficiency, adapt to current environmental requirement and obtain power industry great attention and apply widely, a large amount of thermal power plants starts to adopt selective denitrification device (SCR), in SCR device, the reaction temperature of catalyst is generally 320 ~ 420 DEG C, when out of stock device portal cigarette temperature is between 350 ~ 380 degrees Celsius, SCR reaction efficiency is in highest level, domestic coal unit is when underload, the inlet flue gas temperature of SCR device often can lower than the optimal reaction temperature of SCR catalyst, sometimes even can lower than well-defined reaction temp, cause device denitration effect undesirable, flue gas after device is out of stock still difficulty reach discharge standard.
summary of the invention:
the object of this invention is to provide a kind of membrane panel smoking mouth device and mixed flue gas method.
above-mentioned object is realized by following technical scheme:
a kind of membrane panel smoking mouth device, its composition comprises: membrane panel, described membrane panel is provided with smoking mouth, and described membrane panel is equipped with wear strip, described membrane panel is equipped with sealing block, described membrane panel is equipped with the sealing plate docked with flue.
the mixed flue gas method of described membrane panel smoking mouth device, high-temperature flue gas in stove can be extracted out outside stove through this device when this device uses, this device and bypass flue are tightly connected, flue gas mixes through the low-temperature flue gas of gas bypass with SCR porch, make mixed flue-gas temperature can reach flue-gas temperature needed for denitrification apparatus bringing normally into operation, thus the denitration reaction of the flue gas entering denitrification apparatus can be carried out smoothly, by the NO in flue gas
x
slough, solve and need extract the problem of flue gas when equipment for denitrifying flue gas installs economizer bypass additional from rear pass membrane panel in order to overall process comes into operation.
beneficial effect of the present invention:
1. the present invention directly cuts fin perforate and forms smoking mouth on the membrane panel of rear pass, reaches required flue gas circulation area; Open semicircle hole, tapping fin end, prevents stress from concentrating; Opening area is met fume side and is arranged shoe, with anti-wear; Outside is furnished with the flue Butt sealing plate be connected with bypass flue, by above measure, solves the problem of docking with flue from rear pass membrane panel extraction flue gas and membrane panel.
the present invention is conducive to the enforcement of economizer bypass flue scheme, ensures that denitrification apparatus all can come into operation under unit full load; Change little, be convenient to site operation; If improvement project, the transformation cycle is short, and fund input is few, and does not destroy the original pressure parts of unit.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is left views of accompanying drawing 1.
accompanying drawing 3 is top views of accompanying drawing 1.
accompanying drawing 4 is the fin end machining sketch charts at smoking mouth place of the present invention.
detailed description of the invention:
embodiment 1:
a kind of membrane panel smoking mouth device, its composition comprises: membrane panel 1, described membrane panel is provided with smoking mouth 2, wear strip 3 described membrane panel is equipped with, described membrane panel is equipped with sealing block 4, described membrane panel is equipped with the sealing plate 5 docked with flue.
embodiment:
a kind of mixed flue gas method utilizing membrane panel smoking mouth device described in embodiment 1, high-temperature flue gas in stove can be extracted out outside stove through this device when this device uses, this device and bypass flue are tightly connected, flue gas mixes through the low-temperature flue gas of gas bypass with SCR porch, make mixed flue-gas temperature can reach flue-gas temperature needed for denitrification apparatus bringing normally into operation, thus the denitration reaction of the flue gas entering denitrification apparatus can be carried out smoothly, by the NO in flue gas
x
slough, solve and need extract the problem of flue gas when equipment for denitrifying flue gas installs economizer bypass additional from rear pass membrane panel in order to overall process comes into operation.
Claims (2)
1. a membrane panel smoking mouth device, its composition comprises: membrane panel, it is characterized in that: described membrane panel is provided with smoking mouth, described membrane panel is equipped with wear strip, described membrane panel is equipped with sealing block, described membrane panel is equipped with the sealing plate docked with flue.
2. one kind utilizes the mixed flue gas method of the membrane panel smoking mouth device described in claim 1, it is characterized in that: the high-temperature flue gas in stove can be extracted out outside stove through this device when this device uses, this device and bypass flue are tightly connected, flue gas mixes through the low-temperature flue gas of gas bypass with SCR porch, make mixed flue-gas temperature can reach flue-gas temperature needed for denitrification apparatus bringing normally into operation, thus the denitration reaction of the flue gas entering denitrification apparatus can be carried out smoothly, by the NO in flue gas
xslough, solve and need extract the problem of flue gas when equipment for denitrifying flue gas installs economizer bypass additional from rear pass membrane panel in order to overall process comes into operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510984112.XA CN105413458B (en) | 2015-12-24 | 2015-12-24 | Membrane panel smoking mouth device and mixed flue gas method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510984112.XA CN105413458B (en) | 2015-12-24 | 2015-12-24 | Membrane panel smoking mouth device and mixed flue gas method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105413458A true CN105413458A (en) | 2016-03-23 |
| CN105413458B CN105413458B (en) | 2018-01-05 |
Family
ID=55492264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510984112.XA Active CN105413458B (en) | 2015-12-24 | 2015-12-24 | Membrane panel smoking mouth device and mixed flue gas method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105413458B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004510919A (en) * | 2000-10-19 | 2004-04-08 | ロゼール・トレンブレイ | Exhaust gas treatment device and exhaust gas treatment method |
| CN102589001A (en) * | 2012-03-15 | 2012-07-18 | 浙江大学 | Analysis method for high-temperature corrosion inclination of water-cooled wall of pulverized coal boiler based on flue gas components |
| CN203731400U (en) * | 2014-03-10 | 2014-07-23 | 哈尔滨明远电力科技咨询有限公司 | Abrasion-proof wind device for preventing abrasion of pipe wall of circulating fluidized bed boiler |
| CN204240341U (en) * | 2014-09-13 | 2015-04-01 | 贾征琦 | Cycle Fluid Bed Boiler Antiwear step |
| CN205340572U (en) * | 2015-12-24 | 2016-06-29 | 哈尔滨锅炉厂有限责任公司 | A diaphragm type wall tube panel smoking mouthful device |
-
2015
- 2015-12-24 CN CN201510984112.XA patent/CN105413458B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004510919A (en) * | 2000-10-19 | 2004-04-08 | ロゼール・トレンブレイ | Exhaust gas treatment device and exhaust gas treatment method |
| CN102589001A (en) * | 2012-03-15 | 2012-07-18 | 浙江大学 | Analysis method for high-temperature corrosion inclination of water-cooled wall of pulverized coal boiler based on flue gas components |
| CN203731400U (en) * | 2014-03-10 | 2014-07-23 | 哈尔滨明远电力科技咨询有限公司 | Abrasion-proof wind device for preventing abrasion of pipe wall of circulating fluidized bed boiler |
| CN204240341U (en) * | 2014-09-13 | 2015-04-01 | 贾征琦 | Cycle Fluid Bed Boiler Antiwear step |
| CN205340572U (en) * | 2015-12-24 | 2016-06-29 | 哈尔滨锅炉厂有限责任公司 | A diaphragm type wall tube panel smoking mouthful device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105413458B (en) | 2018-01-05 |
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