CN102485916A - Belly pipe with pulverized coal burning function - Google Patents
Belly pipe with pulverized coal burning function Download PDFInfo
- Publication number
- CN102485916A CN102485916A CN2010105712790A CN201010571279A CN102485916A CN 102485916 A CN102485916 A CN 102485916A CN 2010105712790 A CN2010105712790 A CN 2010105712790A CN 201010571279 A CN201010571279 A CN 201010571279A CN 102485916 A CN102485916 A CN 102485916A
- Authority
- CN
- China
- Prior art keywords
- burner
- inlet
- diameter
- pulverized coal
- coal dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The utility model provides a belly pipe with a pulverized coal burning function, which comprises a premix burner and a burner. The premix burner and the burner are connected through a flange; hot-blast air and pulverized coal simultaneously enter from the inlet of the premix burner; an internal channel in the premix burner is of a reducing pipe structure; the diameter of the outlet of the premix burner is less than that of the inlet of the premix burner and is equal to that of the inlet of the burner; a suddenly expanding combustion chamber is arranged in the burner; the inner diameter of the combustion chamber is greater than the diameter of the inlet of the burner, whereas the outlet section of the burner is also of a reducing pipe structure; and the diameter of the outlet of the burner is less than the inner diameter of the combustion chamber and is also less than the diameter of the inlet of an air inlet. Due to the fact that the pulverized coal starts to be injected into the hot-blast air nearby the inlet of the premix burner, equivalently the existing pulverized coal injected into a blast furnace is injected into the blast furnace again after being burnt outside the furnace, thus, the burning rate of the injected pulverized coal is greatly improved and the burning amount of the pulverized coal in the hot-blast air is increased, thereby the amount of the injected pulverized coal which can be accepted by the blast furnace is obviously increased. At the same time, partially burnt pulverized coal causes the volume and the temperature of combustion products to be increased sharply and the blast kinetic energy is also obviously improved, and therefore, the beneficial effect of improving the work of a blast furnace hearth is brought.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, relate to furnace coal spraying technology and blast furnace blowing device, especially relate to belly pipe with coal dust firing function.
Background technology
In the blast furnace actual production, coal dust is directly to be sprayed in the hot blast near the position air port inlet by spray gun.Generally, from the purpose of taking precautions against coal dust wearing and tearing air port, gun head is bent to certain angle; Directly be inserted on the extended line of belly pipe medullary ray; Its position is the distance about 100～300mm to the passage of air port deeply, so coal dust possibly not produce burning in belly pipe.
Insert spray gun from peep hole, reach the ingress of existing belly pipe, whole belly pipe passage just becomes pulverized coal preheating, destructive distillation, incendiary space, and this improves the rate of combustion of pulverized coal injection in blast furnace greatly.Chinese patent ZL90212210.X just with this end in view.It is spray gun along the upper limb of peep hole passage, directly pass through the hot-air channel space of elbow, reach the belly pipe inlet and carry out coal powder injection.But it is theoretical according to existing blast-furnace coal powder incendiary; Coal dust has possessed the ablaze condition of fugitive constituent through the preheating and the destructive distillation of an air port passage length in the arrival stove, calculates thus; Arrive outlet from the belly pipe inlet; Coal dust has begun burning mass, and this will make the mixed airflow temperature of hot blast and products of combustion thereof be increased to 1500～1700 ℃ level significantly, therefore; Have the belly pipe and anti-material and the belly pipe housing shown in this patent accompanying drawing that in actual production, use now, can not bear fully.
Summary of the invention
The objective of the invention is to propose a kind of belly pipe with coal dust firing function, it can satisfy from the requirement of blast furnace peep hole coal powder injection, helps to improve the combustion efficacy of coal injection simultaneously.
A kind of belly pipe with coal dust firing function is made up of burner and premix burner, and for flange connects, hot blast and coal dust get into from the premix burner inlet simultaneously between burner and the premix burner; The internal passages of premix burner is the reducing pipe structure, and its exit diameter is less than inlet diameter, and equates with the inlet diameter of burner; In burner, be provided with the combustion chamber of unexpected hole enlargement, the internal diameter of combustion chamber is greater than its inlet diameter; And the outlet section of burner is the reducing pipe structure, and its exit diameter is less than the internal diameter of combustion chamber, also less than the inlet diameter in air port.
Said burner has the housing of a water-cooled, is provided with cooling-water duct in the housing, and the material of housing is the combination of heat-resistance stainless steel or copper or other multiple metal materials.The exit end of burner is protruding sphere termination, and inlet end is a flange.The length of burner is in 1.5m.
At the built-in combustion chamber inwall of burner, be inlaid with high temperature resistant, wear-resistant ceramic chamber lining, poured into a mould refractory materials between ceramic chamber lining and water-cooled housing.
The two ends of above-mentioned preheater are flange, and its vias inner walls also is inlaid with high temperature resistant, wear-resistant ceramic chamber lining, have poured into a mould refractory materials between ceramic chamber lining and water-cooled housing.Its length deducts the length of burner for the length of existing belly pipe.When premix burner length during greater than 500mm, its housing is the housing of band water-cooled.
Said burner and premix burner when convenient the manufacturing, can save the intermediary coupling flange, process an integral body, and its internal structure remains unchanged.At this moment, this whole housing has cooling-water duct, and the material of housing is the combination of heat-resistance stainless steel or copper or other multiple metal materials.
The invention has the beneficial effects as follows:
The present invention is the unitized construction that existing belly pipe is become a premix burner and burner, and coal dust is equivalent to the coal dust in the existing spirt blast furnace from beginning to spray near the premix burner inlet among the hot blast, sprays into blast furnace more again after outside stove, burning once.This will improve the rate of combustion of coal injection greatly, improve the burning quantity of coal dust in hot blast, thus significantly improve blast furnace the coal injection quantity that can accept.Meanwhile, partially combusted coal dust causes the volume of products of combustion and temperature to increase sharply, and also will improve blast energy significantly, therefore brings the beneficial effect that improves blast furnace hearth work.Below further explain:
Coal dust sprays in the premix burner, and the passage of reducing pipe form makes hot blast and pulverized coal flow be able to quicken and mix, and is equivalent to the effect that play in existing air port.Coal dust has possessed fugitive constituent incendiary condition through preheating, the destructive distillation of premix burner passage stroke.When burner inlet gets into the combustion chamber; Because decelerating effect is played in hole enlargement suddenly; Make with hot blast thorough mixing and part coal dust with combustion conditions and burn rapidly, effect of deceleration rapid combustion was similar when its effect cand be compared to existing coal injection and gets in the State of Blast Furnace.
In the combustion chamber; Because coal dust has obtained bigger kinetic energy through quickening, when hot blast slowed down, coal dust can rely on the kinetic energy of its acquisition to move on; This makes and produces partially combusted coal dust; Having ready conditions breaks away from the atmosphere of products of combustion on every side, regains the touch opportunity of not firing oxygen in the hot blast, burns away.
Outlet at burner; Because the coal dust partial combustion has increased the temperature and the volume of mixed airflow; The result of its dual function increases the flow velocity of the mixed airflow of hot blast and part Pulverized Coal Combustion Products, and under the booster action of outlet reducing pipe, blast energy significantly strengthens.Simultaneously, under the effect of reducing pipe, the coal dust that diffuses to the air-flow edge is converged to the center, air port again, prevented of the wearing and tearing of high speed destructive distillation coal dust the air port vias inner walls.
Enter the mouth in the air port; Because the burner outlet diameter is less than the air port inlet diameter; The mixed airflow of hot blast and part Pulverized Coal Combustion Products will be in the passage of air port slows down once more, makes the part coal dust of having an opportunity again to obtain to mix with hot blast and possessing combustion conditions burn once more.The rate of combustion that this has not only further increased coal injection makes product temperature and blast energy thereof after the burning further improve simultaneously.
In addition, in the passage of air port, be able to fusing by the part coal powder fraction after the perfect combustion; The ash content of this part fusing back disperse in mixed airflow; When diffusing to the air port vias inner walls, will be forced cooling docile and obedient on the conduit wall of air port by the air port, become the crust block resist that runs its course.This dynamic crust block resist is to eliminating essence is played in existing air port by the present situation of cold coal dust wearing and tearing mitigation.Those are fully preheating, destructive distillation; Do not obtain chance and run into the unburned coal powder of oxygen; Acceleration, moderating process have repeatedly been passed through twice; Fully disperse in the mixed airflow of hot blast and part Pulverized Coal Combustion Products, even have an opportunity to run into the air port inwall, the destruction that its abrasive action has been caused the air port wearing and tearing far away from the existing cold coal dust that is stream strand.
Description of drawings
Fig. 1 is the structure sectional view of the embodiment of the invention 1.
Fig. 2 is the structure sectional view of the embodiment of the invention 2.
In figure, 1 is protruding sphere termination, and 2 is housing, and 3 is cooling-water duct, and 4 is refractory materials, and 5 is ceramic chamber lining, and 6 is burner; 7 is the combustion chamber, and 8 is flange, and 9 is flange, and 10 is refractory materials, and 11 is ceramic-lined, and 12 is housing, and 13 is premix burner, and 14 is flange, and 15 is housing.
Embodiment
Embodiment 1
As shown in Figure 1, the belly pipe with coal dust firing function is made up of burner 6 and premix burner 13, connects for flange 8 and 9 between burner 6 and the premix burner 12, and hot blast and coal dust are simultaneously from the premix burner entering that enters the mouth.
As shown in Figure 1, the internal passages of premix burner 6 is the reducing pipe structure, and its effect is to make hot blast and coal dust be able to quicken and mix, and is equivalent to the effect that play in existing air port.The exit diameter ￠ 2 of premix burner 13 is less than inlet diameter ￠ 1, and equates with the inlet diameter ￠ 3 of burner.
As shown in Figure 1; In burner 6; Be provided with the combustion chamber 7 of unexpected hole enlargement, its effect is: when coal dust gets into combustion chamber 7 through burner 6 inlets, because decelerating effect is played in hole enlargement suddenly; Make with hot blast thorough mixing and part coal dust with combustion conditions and burn rapidly, the similar effect of deceleration rapid combustion when caing be compared to existing coal injection and getting in the State of Blast Furnace.The internal diameter ￠ 4 of combustion chamber 7 is greater than its inlet diameter ￠ 3.
As shown in Figure 1, the outlet section of burner 6 is the reducing pipe structure, and its effect is: make from the combustion chamber 7 hot blasts of going out and the mixed airflow of part Pulverized Coal Combustion Products increase flow velocity, improve mixing efficiency; The coal dust that will diffuse to the air-flow edge simultaneously converges to the center, air port again, has prevented the wearing and tearing of high speed destructive distillation coal dust to the air port vias inner walls.The exit diameter ￠ 5 of burner is less than the internal diameter ￠ 4 of combustion chamber, also less than the inlet diameter in air port.
Because the exit diameter ￠ 5 of burner 6 is less than the inlet diameter in air port; Make the mixed airflow of hot blast and part Pulverized Coal Combustion Products; Will be in the passage of air port slow down once more, have an opportunity again to obtain to mix and the part coal dust that possesses combustion conditions burns once more with hot blast.
As shown in Figure 1, said burner 6 has the housing 2 of a water-cooled, is provided with cooling-water duct 3 in the housing 2, and the material of housing 2 is combinations of heat-resistance stainless steel or copper or other multiple metal materials.The exit end of burner 6 is protruding sphere termination 1, and inlet end is a flange 8.The length of burner 6 is in 1.5m.
As shown in Figure 1, at built-in combustion chamber 7 inwalls of burner 6, be inlaid with high temperature resistant, wear-resistant ceramic chamber lining 5,2 of ceramic chamber lining 5 and water-cooled housings have been poured into a mould refractory materials 4.
As shown in Figure 1, the two ends of above-mentioned premix burner 13 are flange 9 and 14, and its vias inner walls also is inlaid with high temperature resistant, wear-resistant ceramic chamber lining 11, and 12 of ceramic chamber lining 11 and its housings have been poured into a mould refractory materials 10.The length of premix burner 13 deducts the length of burner 6 for the length of existing belly pipe.During greater than 500mm, its housing 12 is housings of band water-cooled in premix burner length.
Embodiment 2
As shown in Figure 2, said burner 6 and premix burner 13 when convenient the manufacturing, can save intermediary coupling flange 8 and 9, process an integral body, and its internal structure remains unchanged.At this moment, in this whole housing 15 cooling-water duct 3 is arranged.The material of housing 2 is combinations of heat-resistance stainless steel or copper or other multiple metal materials.
In the foregoing description, air port and elbow are the prior art content.Figure of description 1 is a Figure of abstract.
Claims (6)
1. belly pipe with coal dust firing function, it is characterized in that: it is made up of burner and premix burner, and for flange connects, hot blast and coal dust get into from the premix burner inlet simultaneously between burner and the premix burner; The internal passages of premix burner is the reducing pipe structure, and its exit diameter is less than inlet diameter, and equates with the inlet diameter of burner; In burner, be provided with the combustion chamber of unexpected hole enlargement, the internal diameter of combustion chamber is greater than its inlet diameter; And the outlet section of burner is the reducing pipe structure, and its exit diameter is less than the internal diameter of combustion chamber, also less than the inlet diameter in air port.
2. aforesaid right requires 1 said belly pipe with coal dust firing function; It is characterized in that: said burner has the housing of a water-cooled; Be provided with cooling-water duct in the housing, the material of housing is the combination of heat-resistance stainless steel or copper or other multiple metal materials.
3. aforesaid right requires 1 said belly pipe with coal dust firing function, it is characterized in that: the exit end of said burner is protruding sphere termination, and inlet end is a flange.
4. aforesaid right requires 1 said belly pipe with coal dust firing function, it is characterized in that: the combustion chamber inwall that said burner is built-in, be inlaid with high temperature resistant, wear-resistant ceramic chamber lining, and poured into a mould refractory materials between ceramic chamber lining and housing.
5. aforesaid right requires 1 said belly pipe with coal dust firing function, and it is characterized in that: the two ends of said preheater are flange, and its vias inner walls is inlaid with high temperature resistant, wear-resistant ceramic chamber lining, has poured into a mould refractory materials between ceramic chamber lining and housing.
6. aforesaid right requires 1 said belly pipe with coal dust firing function, and it is characterized in that: said burner and premix burner are done as a whole the manufacturing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105712790A CN102485916A (en) | 2010-12-01 | 2010-12-01 | Belly pipe with pulverized coal burning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105712790A CN102485916A (en) | 2010-12-01 | 2010-12-01 | Belly pipe with pulverized coal burning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102485916A true CN102485916A (en) | 2012-06-06 |
Family
ID=46151490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105712790A Pending CN102485916A (en) | 2010-12-01 | 2010-12-01 | Belly pipe with pulverized coal burning function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102485916A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672866A (en) * | 2013-11-25 | 2014-03-26 | 中国科学院过程工程研究所 | Device and method for preheating combustion of jetting pulverized coal used in iron-making process |
| CN111621609A (en) * | 2020-07-20 | 2020-09-04 | 四川冶金设备开发有限公司 | Energy-saving blast furnace coal powder spray gun |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291577Y (en) * | 1996-10-18 | 1998-09-16 | 中国科学院化工冶金研究所 | Oxygen-coal lance pulverized coal burner for blast furnace |
| CN201873702U (en) * | 2010-12-01 | 2011-06-22 | 张昭贵 | Belly pipe with pulverized coal burning function |
-
2010
- 2010-12-01 CN CN2010105712790A patent/CN102485916A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291577Y (en) * | 1996-10-18 | 1998-09-16 | 中国科学院化工冶金研究所 | Oxygen-coal lance pulverized coal burner for blast furnace |
| CN201873702U (en) * | 2010-12-01 | 2011-06-22 | 张昭贵 | Belly pipe with pulverized coal burning function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672866A (en) * | 2013-11-25 | 2014-03-26 | 中国科学院过程工程研究所 | Device and method for preheating combustion of jetting pulverized coal used in iron-making process |
| CN103672866B (en) * | 2013-11-25 | 2016-04-06 | 中国科学院过程工程研究所 | A kind of iron-smelting process coal injection furnace preheat burner and method |
| CN111621609A (en) * | 2020-07-20 | 2020-09-04 | 四川冶金设备开发有限公司 | Energy-saving blast furnace coal powder spray gun |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206280955U (en) | The burner of premixed flow injection smoke backflow temperature control and low nitrogen burning | |
| CN102777894B (en) | Reverse powder injection combustor | |
| CN205447747U (en) | Ultralow NOx combustor of hot flue gas self -loopa type | |
| CN107559817A (en) | A kind of swirling pulverized coal combustion device and method using flue gas recirculation | |
| CN107606613A (en) | The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification | |
| CN109402314B (en) | Top combustion type hot blast stove burner | |
| CN201873702U (en) | Belly pipe with pulverized coal burning function | |
| CN203980280U (en) | A kind of low NO xflue gas is from return flow burner | |
| CN107355786A (en) | The more level air-distributions of industrial combustion gas kiln are oxygen-enriched with burning burner special | |
| CN102485916A (en) | Belly pipe with pulverized coal burning function | |
| CN207527582U (en) | The low nitrogen rotational flow gas-fired combustor of flue gas recirculation built in gas-air Accurate Classification | |
| CN206831504U (en) | Drying grate coal dust concurrent heating burner | |
| CN201250239Y (en) | Blast furnace coal injection gun | |
| CN102322633A (en) | Pure-oxygen pulverized coal entraining combustor | |
| CN202209676U (en) | Coal spraying jet | |
| CN201873701U (en) | Belly pipe with coal powder pre-burning function | |
| CN104566550A (en) | Gas dividing device for air blower gas stove | |
| CN2291577Y (en) | Oxygen-coal lance pulverized coal burner for blast furnace | |
| CN216644209U (en) | Direct-fired burner for combustion chamber of shaft furnace | |
| CN205119066U (en) | High combustion rate burner | |
| CN2142927Y (en) | High-pressure two-oxygen-flow internal combustion flame spray gun of coal powder | |
| CN102338376B (en) | A kind of coal burner | |
| CN218710618U (en) | Hot-blast furnace throat structure and top combustion formula hot-blast furnace | |
| GB1216042A (en) | Method and device for injecting liquid fuel into a shaft furnace | |
| CN2158030Y (en) | Low-volatile portion coal dust burner for rotary cement kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Qin Lu Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120606 |