CN109489033A - The low nitrogen processing method of biogas combustion tail gas and burner apparatus - Google Patents
The low nitrogen processing method of biogas combustion tail gas and burner apparatus Download PDFInfo
- Publication number
- CN109489033A CN109489033A CN201811365853.XA CN201811365853A CN109489033A CN 109489033 A CN109489033 A CN 109489033A CN 201811365853 A CN201811365853 A CN 201811365853A CN 109489033 A CN109489033 A CN 109489033A
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- Prior art keywords
- tail gas
- gas
- combustion
- burner
- combustion chamber
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
Abstract
The invention discloses a kind of low nitrogen processing method of biogas combustion tail gas and burner apparatus, the low nitrogen processing method of a kind of biogas combustion tail gas, comprising the following steps: S1, setting burner, spray gun, combustion chamber, Tail gas measuring device and gas emission device；S2 burns for the first time to biogas combustion tail gas by burner；Reducing agent is sprayed to combustion chamber high temperature area by spray gun by S3 in combustion；S4 carries out amount of nitrogen oxides detection to the tail gas after burning by Tail gas measuring device；S5 discharges the tail gas for meeting discharge standard by gas emission device；S6 burns to the tail gas pumpback for not meeting discharge standard to combustion chamber by tail gas pumpback device again after mixing with combustion chamber inner exhaust gas；Cost of investment of the present invention is low, easy to implement, and effect is good, for the heat exchange equipment of middle-size and small-size biological substance for combustion gas, meets environment protection standard emission request.
Description
Method field
The invention belongs to exhaust gas treating method more particularly to the low nitrogen processing methods of biogas combustion tail gas.
Background technique
Biogas in use, since combustion gas itself contains a large amount of nitrogen, under atmosphere existing for excess of oxygen,
A certain amount of nitrogen oxides will be generated, such as without technical treatment, the tail gas institute nitrogen-containing oxide after these burnings cannot expire
Sufficient environment protection emission wants concentration limit standard.
The industrial applicability of biomass gasification equipment, matched biomass burner first have to meet combustion gas in design
The safe design directive/guide of burner；It currently, is still blank suitable for the burner of biological fuel gas, in conjunction with biogas calorific value
Low, specific load usage amount is big, the fast situation of flow velocity, and optimization design is needed to be suitable for the burner that biogas burning uses.
Meanwhile to meet current environmental requirement, need to consider burner can not only completely burned, while the nitrogen oxygen being ensured that in tail gas
Compound concentration meets environmental emission standard requirement.
More is natural gas and oil burner currently on the market, and the low-NO_x combustion technology used is generally by combustion
Expect that sectional combustion and air segmenting combustion scheme realize low nitrogen burning.This technology for low heat value biogas and be not suitable with.
And existing combustion gas tail gas takes off low nitrogen processing unit and generally uses on large-sized boiler, investment is larger, general to urge using selectivity is non-
Change reduction method, use reducing agent for ammonium hydroxide, for small-sized gas fired-boiler, is generally divided on the burner using air and fuel
Combustion technology, such burner can not be suitable for biological fuel gas.
Summary of the invention
The present invention is to solve the problems, such as method existing for known method and provide biogas combustion tail gas low nitrogen processing method.
The present invention is to solve the problems, such as the method scheme that method existing for known method is taken: a kind of biogas burning
The low nitrogen processing method of tail gas, comprising the following steps: S1, setting burner, spray gun, combustion chamber, Tail gas measuring device and tail gas row
Put device；S2 burns for the first time to biogas combustion tail gas by burner；S3 is being burnt reducing agent by spray gun
It is sprayed to combustion chamber high temperature area in the process；S4 carries out amount of nitrogen oxides inspection to the tail gas after burning by Tail gas measuring device
It surveys；S5 discharges the tail gas for meeting discharge standard by gas emission device；S6, by tail gas pumpback device to not being inconsistent
The tail gas pumpback of discharge standard is closed to combustion chamber, is burnt again after being mixed with combustion chamber inner exhaust gas.
Further, the reducing agent is urea liquid.
Further, the burner is mixed into mouth, gas circulation unit, urea by combustion chamber, combustion gas pumpback device, tail gas
Solution containment, Tail gas measuring device and gas emission device composition.
Further, the tail gas is mixed into mouth equipped with tail gas pumpback blower, reaches preliminary and realizes burner outlet nitrogen oxidation
The preliminary inhibiting effect of object.
Further, the gas circulation unit is equipped with biggish air circulation cross-section, reduces flow velocity, to avoid easily flame-out
The occurrence of.
Further, the urea liquid device is made of urea pump, urea pump solution storage trough, spray gun and pipeline, the dress
The setting set further decreases nitrogen oxide in tail gas content.
The present invention has the advantage that as follows with good effect:
(1) it is flashed back technology using flue gas, it is preliminary to complete to inhibit nitrogen oxides in effluent content；Simultaneously in the use of combustion high temperature area "
SNCR ", selective non-catalytic reduction method further remove remaining nitrogen oxides in flue gas using urea liquid as reducing agent,
After ensuring biological fuel gas burning, nitrous oxides concentration meets environment protection standard emission request.
(2) requirement for meeting tail gas qualified discharge after biogas burns, solves biological substance for combustion gas environment protection standard
Problem.
(3) it has filled up inanimate object matter low NO equipment in the market and has successfully solved to use biological tail-gas qualified discharge
Problem.
(4) this method is at low cost, easy to implement, and effect is good, for the heat exchange equipment of middle-size and small-size biological substance for combustion gas, meets
Environment protection standard emission request.
Detailed description of the invention
Fig. 1 is the method for the present invention schematic diagram；
Fig. 2 is burner structure schematic diagram in the present invention.
Specific embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following embodiment, and cooperate attached drawing
Detailed description are as follows.
The low nitrogen processing method of biogas combustion tail gas of the invention is explained in detail below with reference to Fig. 1 and Fig. 2: logical
It crosses burner to burn to biogas combustion tail gas for the first time, nitrogen oxygen is then carried out to the tail gas after burning by Tail gas measuring device
Compound content detection, the technology wherein tail gas for taking suitable biological fuel gas to the tail gas for not meeting discharge standard flashes back will
The tail gas pumpback of hypoxemia amount, which enters in burner, to be mixed, and oxygen content in burner is controlled, preliminary to inhibit burner outlet tail
Nitrogen oxides in gas；Further to remove the nitrogen oxides in tail gas, it is anti-that selective non-catalytic is carried out in combustion chamber high temperature area
Former method removes denitrification, by spraying into the measure of urea liquid, the nitrogen oxides generated after burning is carried out reduction reaction, is had
Effect removes the low nitrogen oxides for being discharged into atmosphere, reaches environmental emission standard requirement.
Wherein, a kind of low its corollary equipment of nitrogen processing method of biomass combustion tail gas includes a burner, the burner
Mouth, gas circulation unit, urea liquid device, Tail gas measuring device and tail gas are mixed by combustion chamber, combustion gas pumpback device, tail gas
Tapping equipment composition reaches preliminary and realizes burner outlet nitrogen oxygen by being mixed into mouth equipped with tail gas pumpback blower in the tail gas
The preliminary inhibiting effect of compound, the gas circulation unit are equipped with biggish air circulation cross-section, flow velocity are reduced, to avoid easily putting out
The occurrence of fiery, the urea liquid device are made of urea pump, urea pump solution storage trough, spray gun and pipeline, the device
Setting further decreases nitrogen oxide in tail gas content.
In summary: the present invention drops oxygen measure by using tail gas pumpback and urea liquid method is sprayed in burner high temperature area
Afterwards, the requirement for meeting tail gas qualified discharge after biogas burns, solves the problems, such as biological substance for combustion gas environment protection standard；It fills up
In the market inanimate object matter low NO equipment and successfully solve the problems, such as to use raw biogas tail gas qualified discharge, this hair
Bright cost of investment is low, easy to implement, and effect is good, for the heat exchange equipment of middle-size and small-size biological substance for combustion gas, meets environmental protection
Qualified discharge requirement.
The above is only the preferred embodiments of the present invention, and is not intended to limit the present invention in any form,
Any simple modification substantially made to the above embodiment of all methods according to the present invention, equivalent variations and modification, belong to
In the range of the method for the present invention scheme.
Claims (6)
1. a kind of low nitrogen processing method of biogas combustion tail gas, which comprises the following steps:
S1, setting burner, spray gun, combustion chamber, Tail gas measuring device and gas emission device；
S2 burns for the first time to biogas combustion tail gas by burner；
Reducing agent is sprayed to combustion chamber high temperature area by spray gun by S3 in combustion；
S4 carries out amount of nitrogen oxides detection to the tail gas after burning by Tail gas measuring device；
S5 discharges the tail gas for meeting discharge standard by gas emission device；
S6 mixes the tail gas pumpback for not meeting discharge standard to combustion chamber by tail gas pumpback device with combustion chamber inner exhaust gas
It burns again afterwards.
2. the low nitrogen processing method of biogas combustion tail gas according to claim 1, it is characterised in that: the step S3 is also
The following steps are included:
The reducing agent is urea liquid.
3. a kind of burner apparatus for realizing the low nitrogen processing method of biogas combustion tail gas described in claim 1, feature exist
In: the burner is mixed into mouth, gas circulation unit, urea liquid device, tail gas by combustion chamber, combustion gas pumpback device, tail gas
Detection device and gas emission device composition.
4. burner apparatus according to claim 3, it is characterised in that: the tail gas is mixed into mouth equipped with tail gas pumpback wind
Machine.
5. burner apparatus according to claim 3, it is characterised in that: the gas circulation unit is logical equipped with big air stream
Section.
6. burner apparatus according to claim 3, it is characterised in that: the urea liquid device is by urea pump, urea
Pump solution storage trough, spray gun and pipeline composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811365853.XA CN109489033A (en) | 2018-11-16 | 2018-11-16 | The low nitrogen processing method of biogas combustion tail gas and burner apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811365853.XA CN109489033A (en) | 2018-11-16 | 2018-11-16 | The low nitrogen processing method of biogas combustion tail gas and burner apparatus |
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| CN109489033A true CN109489033A (en) | 2019-03-19 |
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| CN201811365853.XA Pending CN109489033A (en) | 2018-11-16 | 2018-11-16 | The low nitrogen processing method of biogas combustion tail gas and burner apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559798A (en) * | 2019-09-29 | 2019-12-13 | 福建致一环保科技有限公司 | Voc waste gas treatment device and method |
| CN112377930A (en) * | 2020-10-16 | 2021-02-19 | 雷波凯瑞磷化工有限责任公司 | Method and equipment for reducing nitrogen oxide emission by yellow phosphorus tail gas combustion |
| CN112393229A (en) * | 2020-10-16 | 2021-02-23 | 雷波凯瑞磷化工有限责任公司 | Boiler capable of reducing nitrogen oxide emission during combustion of yellow phosphorus tail gas |
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| US20070231231A1 (en) * | 2004-06-03 | 2007-10-04 | Andritz Oy | Method for Reducing Nitrogen Oxide Emissions |
| CN206398703U (en) * | 2017-01-11 | 2017-08-11 | 北京科诺锅炉有限公司 | A kind of flue gas recirculation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110559798A (en) * | 2019-09-29 | 2019-12-13 | 福建致一环保科技有限公司 | Voc waste gas treatment device and method |
| CN112377930A (en) * | 2020-10-16 | 2021-02-19 | 雷波凯瑞磷化工有限责任公司 | Method and equipment for reducing nitrogen oxide emission by yellow phosphorus tail gas combustion |
| CN112393229A (en) * | 2020-10-16 | 2021-02-23 | 雷波凯瑞磷化工有限责任公司 | Boiler capable of reducing nitrogen oxide emission during combustion of yellow phosphorus tail gas |
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