CN206803130U - A kind of fractional combustion heating furnace - Google Patents
A kind of fractional combustion heating furnace Download PDFInfo
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- CN206803130U CN206803130U CN201720658342.1U CN201720658342U CN206803130U CN 206803130 U CN206803130 U CN 206803130U CN 201720658342 U CN201720658342 U CN 201720658342U CN 206803130 U CN206803130 U CN 206803130U
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- combustion chamber
- combustion
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- main body
- fuel entrance
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Abstract
The utility model discloses a kind of fractional combustion heating furnace, including main body, combustion chamber, hemispherical furnace roof and regenerator, combustion chamber is respectively equipped with primary fuel entrance, secondary fuel entrance, air intake and medicament spray orifice from bottom to top, and the utility model reaches the purpose of denitration in the stove by the method for fractional combustion.The beneficial effects of the utility model are：Designed using vertical shaft furnace, body of heater there are enough spaces so that each combustion zone is well defined, and each zonal combustion atmosphere is controllable, ignition temperature is less than 1100 DEG C, and the growing amount of nitrogen oxides is few, in addition, medicament spray orifice is set up, can further reduce the nitrogen oxides generated.The utility model is from, with latter two stage denitration of burning, denitration effect is obvious, and nitrogen oxide in tail gas content is less than 150mg/m during burning3, drastically reduce the area the discharge capacity of nitrogen oxides.
Description
Technical field
It the utility model is related to field of furnaces, more particularly to a kind of fractional combustion heating furnace and realize denitration in the stove with it
Method.
Background technology
In recent years, with haze large area, prolonged appearance, country is administered to air and the requirement of environmental protection is lifted
The height new to one.One of atmosphere pollution main source is industrial combustion waste gas.Generally to the processing of industrial combustion waste gas
It is dedusting, but the processing to wherein pernicious gas is but very limited, nitrogen oxides, sulfide and other harmful gas in waste gas
Body is directly discharged in air, and in line nitrogen oxides of exhaust gas content is up to 3000mg/m3, far beyond national 420mg/
m3Discharge standard, serious destruction is brought to environment, and nitrogen oxides can form acid rain and photochemical fog, moreover it is possible to destroy smelly
Oxygen layer, therefore, it should try one's best and reduce the discharge of nitrogen oxides, i.e., denitration be carried out to industrial waste gas.
According to the difference in nitrogen source, denitration be divided into burning before denitration, combustion process denitration and burning after denitration.Burning
Preceding denitration is mainly the denitration to the solid burning article of the Nitrogen elements such as coal；For gaseous fuel, using air as combustion adjuvant
In the case of, the nitrogen in air is the source of nitrogen, and such case is applicable combustion process denitration；Denitration refers to after burning
Reducing substances is added in combustion tail gas nitrogen oxides is reduced into nitrogen.
For the burner using gaseous fuel, when ignition temperature is higher than 1500 DEG C, the generating rate meeting of nitrogen oxides
Obvious increase, therefore, it is combustion process denitration conventional means to reduce ignition temperature.The general method for using sectional combustion, passes through
The ratios of different combustion phases fuel and air is controlled to reduce ignition temperature, so as to reduce the generation of nitrogen oxides.It is existing to adopt
Horizontal put is used with the usual small volume of the burner of sectional combustion, such as internal combustion engine, or due to the limitation of application places
Put, be combustion and segmented unobvious the drawbacks of said burner, temperature is difficult to control, and is taken off after can not being burnt to tail gas
Nitre, cause denitration effect bad, discharged nitrous oxides reducing effect can not meet existing pollutant emission standard.
Utility model content
For the deficiency in prior art burner structure, the utility model provides a kind of fractional combustion heating furnace and uses it
The method for realizing denitration in the stove, to solve the above problems.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：
A kind of fractional combustion heating furnace, including main body 1, combustion chamber 2, hemispherical furnace roof 3 and regenerator 4；Wherein, main body 1
For cylinder, inside there is the refractory brick barricade 11 contour with main body 1, the inner space of the main body is divided into by refractory brick barricade 11
Combustion chamber 2 and regenerator 4, the upper end of main body 1 and the airtight connection of hemispherical furnace roof 3；On the outer wall of combustion chamber 2 bottom-up successively
Primary fuel entrance 21, secondary fuel entrance 22, air intake 23 and medicament spray orifice 24 are set to, is furnished with primary fuel entrance 21
Igniter, it is primary zone A, secondary fuel entrance 22 and air intake between primary fuel entrance 21 and secondary fuel entrance 22
It is reburning zone B between 23, is burning-out zone C between air intake 23 to the upper end of combustion chamber 2, medicament spray orifice 24 is located at combustion chamber 2
The top of outer wall.
Further, the internal diameter of main body 1 is 6-6.5m, and the primary zone A, reburning zone B and burning-out zone C highly ratios are A:B:
C=1:1:4.
Preferably, when A=3m, B=3m, C=12m, denitration effect is optimal, and ignition temperature is less than 1100 DEG C, nitrogen oxides
Content is less than 150mg/m3。
Further, the primary fuel entrance 21 is located among the combustion chamber 2, the secondary fuel entrance 22 and described
Air intake 23 divides row the both sides of combustion chamber 2；The primary fuel entrance 21, secondary fuel entrance 22 and air intake 23 are straight
Footpath is respectively 200mm, 200mm and 400mm.
Further, the medicament spray orifice 24 is 2 groups, and cross direction profiles are in the both sides of combustion chamber 2, medicament spray orifice described in every group
24 are made up of 5 circular holes laterally arranged, and the Circularhole diameter is 50mm.
The beneficial effects of the utility model are：Designed using vertical shaft furnace, body of heater there are enough spaces to cause each burning
Region division is clear and definite, and each zonal combustion atmosphere is controllable, and ignition temperature is less than 1100 DEG C, and the growing amount of nitrogen oxides is few；Reburning zone
Fuel is only filled with, is not filled with air, very strong reducing atmosphere is formed, the nitrogen oxides generated in primary zone is reduced to nitrogen
Gas；Burning-out zone is only filled with burnout degree, under the conditions of normal excess air (excess coefficient 1.1), makes unburned carbon monoxide
It is complete with the carbon burning in flying dust, realize the purpose that nitrogen oxides in effluent content is greatly reduced.Medicament spray orifice is set up, can be in ring
After guarantor's index is tightened up, pass through and out of stock medicament is sprayed into burning-out zone end, further reduce the NITROGEN IN LOW CONCENTRATION oxidation remained in flue gas
Thing, realize the minimum discharge of nitrogen oxides in effluent.The utility model is imitated from during burning with latter two stage denitration of burning, denitration
Fruit is obvious, is not injected into the i.e. achievable nitrogen oxide in tail gas content of denitration medicament and is less than 150mg/m3。
Brief description of the drawings
Fig. 1 is a kind of front view of fractional combustion heating furnace of the utility model.
Fig. 2 is a kind of top view of fractional combustion heating furnace of the utility model.
Reference：
Main body 1；
Refractory brick barricade 11；
Combustion chamber 2；
Primary fuel entrance 21；
Secondary fuel entrance 22；
Air intake 23；
Medicament spray orifice 24；
Hemispherical furnace roof 3；
Regenerator 4.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
Embodiment 1
Shown in reference picture 1, the present embodiment is related to a kind of fractional combustion heating furnace with concrete structure.The fractional combustion
Heating furnace, including main body 1, combustion chamber 2, hemispherical furnace roof 3 and regenerator 4, wherein, main body 1 is cylinder, is inside had and main body 1
The inner space of the main body is divided into combustion chamber and regenerator, main body by contour refractory brick barricade 11, refractory brick barricade 11
Upper end and hemispherical furnace roof airtight connection, primary fuel entrance 21, two level are sequentially provided with bottom-up on the outer wall of combustion chamber
Fuel inlet 22, air intake 23 and medicament spray orifice 24, primary fuel porch are furnished with igniter, primary fuel entrance and institute
It is primary zone A to state between secondary fuel entrance, is reburning zone B between secondary fuel entrance and air intake, air intake to combustion
Burning is burning-out zone C between the upper end of room, and medicament spray orifice is located at the top of the outer wall of combustion chamber.
Wherein：
The inner major diameter is 6-6.5m；The region height：Primary zone A=3m, reburning zone B=3m, burning-out zone C=
12m；
The primary fuel entrance is located among the combustion chamber, the secondary fuel entrance and the air intake point row
The combustion chamber both sides, the primary fuel entrance, secondary fuel entrance and air inlet diameter be respectively 200mm, 200mm and
400mm；
The medicament spray is 2 groups, and cross direction profiles are in the combustion chamber both sides, and medicament spray orifice 24 described in every group is by 5 transverse directions
The circular hole composition of arrangement, the Circularhole diameter is 50mm.
Using above-mentioned fractional combustion heating furnace carry out denitration in the stove method, the fractional combustion heating furnace use gas for
Fuel, combustion adjuvant are air, are comprised the following steps that：
1) total excess air coefficient is 1.05, is converted according to the calorific value of fuel, and the component of fuel and air is carried out
Simplifying processing, each component is as shown in table 1,
The each component volume fraction of table 1
| Component | H2 | CH4 | CO | O2 | CO2 | N2 |
| Volume fraction | 0.2084 | 0.1216 | 0.0898 | 0.0194 | 0.1824 | 0.3784 |
70% and air of total fuel by volume 1:1.2 are filled with the primary zone A by the primary fuel entrance,
Meanwhile remaining 30% fuel is entered to be filled with the reburning zone B from the secondary fuel, while being filled with fuel, described in startup
Igniter；
2) light a fire after 2-4s, surplus air is filled with the burning-out zone C by the air intake 23.
When fume emission index can not meet environmental requirement at this stage, start medicament ejector system, pass through the medicament
Spray orifice (24) at the same to burning-out zone end spray into medicament.
The combustion case in above-mentioned each region of combustion process is simulated with CHEMKIN softwares：
Primary zone
Excess air coefficient is 0.85, because primary zone is the burning condition of fuel-rich oxygen deprivation, so NO2Growing amount very
Few, nitrogen oxides main component is NO, and the main reaction being related to is：N2+O2=2NO, the NO molal volume fractions of generation are
870ppm.Calculated by said components, NO molal volume fractions are up to 3100ppm if not by the way of the fractional combustion.
Reburning zone
The NO that primary zone can be generated by adding remaining 30% fuel is reduced, and the reaction being related to is：
NO+CH=HCN+O
NO+CH2=HOCN+H
NO+CH2(S)=HCN+OH
NO+CH3=HCN+H2O
NO+CH3=H2CN+HO
NO+HO2=NO2+OH
By reduction of the reproducibility fuel to NO, reburning zone NO molal volumes fraction can be down to tens ppm.
Burning-out zone
It is passed through remaining air and unburned sufficiently fuel after-flame, the process is inevitably generated into a part of NO, most
Amount of nitrogen oxides is less than 150mg/m in whole combustion tail gas3。
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (5)
1. a kind of fractional combustion heating furnace, including main body (1), combustion chamber (2), hemispherical furnace roof (3) and regenerator (4), described
Main body (1) is cylinder, inside there is a refractory brick barricade (11) contour with the main body (1), and the refractory brick barricade (11) is by institute
The inner space for stating main body (1) is divided into the combustion chamber (2) and regenerator (4), main body (1) upper end and the hemispherical
Furnace roof (3) airtight connection, it is characterised in that be sequentially provided with primary fuel bottom-up on the outer wall of the combustion chamber (2) and enter
Mouth (21), secondary fuel entrance (22), air intake (23) and medicament spray orifice (24), primary fuel entrance (21) place is furnished with
Igniter, is primary zone A between the primary fuel entrance (21) and the secondary fuel entrance (22), the secondary fuel
It is reburning zone B between entrance (22) and the air intake (23), the air intake (23) arrives the combustion chamber (2) upper end
Between be burning-out zone C, the medicament spray orifice (24) is located at the top of the combustion chamber (2) outer wall.
2. fractional combustion heating furnace according to claim 1, it is characterised in that main body (1) internal diameter is 6-6.5m, institute
It is A to state primary zone A, reburning zone B and burning-out zone C highly ratios:B:C=1:1:4.
3. fractional combustion heating furnace according to claim 2, it is characterised in that the primary zone A, reburning zone B and after-flame
Area C is highly respectively：A=3m, B=3m, C=12m.
4. according to the fractional combustion heating furnace described in claim any one of 1-3, it is characterised in that the primary fuel entrance
(21) among the combustion chamber (2), the secondary fuel entrance (22) and the burning of the air intake (23) point row
Room (2) both sides, the primary fuel entrance (21), secondary fuel entrance (22) and air intake (23) diameter be respectively 200mm,
200mm and 400mm.
5. according to the fractional combustion heating furnace described in claim any one of 1-3, it is characterised in that the medicament spray orifice (24) is
2 groups, cross direction profiles are in the combustion chamber (2) both sides, and medicament spray orifice (24) is made up of 5 circular holes laterally arranged described in every group,
The Circularhole diameter is 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720658342.1U CN206803130U (en) | 2017-06-07 | 2017-06-07 | A kind of fractional combustion heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720658342.1U CN206803130U (en) | 2017-06-07 | 2017-06-07 | A kind of fractional combustion heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206803130U true CN206803130U (en) | 2017-12-26 |
Family
ID=60745242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720658342.1U Expired - Fee Related CN206803130U (en) | 2017-06-07 | 2017-06-07 | A kind of fractional combustion heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206803130U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798518A (en) * | 2019-03-29 | 2019-05-24 | 烟台龙源电力技术股份有限公司 | Low NO and combustion system |
-
2017
- 2017-06-07 CN CN201720658342.1U patent/CN206803130U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798518A (en) * | 2019-03-29 | 2019-05-24 | 烟台龙源电力技术股份有限公司 | Low NO and combustion system |
| CN109798518B (en) * | 2019-03-29 | 2024-03-15 | 烟台龙源电力技术股份有限公司 | Low nitrogen burner and combustion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |