CN203715661U - Preheating device for improving combustion efficiency of hot blast stove - Google Patents
Preheating device for improving combustion efficiency of hot blast stove Download PDFInfo
- Publication number
- CN203715661U CN203715661U CN201320868752.0U CN201320868752U CN203715661U CN 203715661 U CN203715661 U CN 203715661U CN 201320868752 U CN201320868752 U CN 201320868752U CN 203715661 U CN203715661 U CN 203715661U
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- CN
- China
- Prior art keywords
- air
- preheater
- gas
- waste gas
- gas valve
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- 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.)
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 20
- 239000002912 waste gas Substances 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 35
- 239000003034 coal gas Substances 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 description 8
- 239000011449 brick Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses a preheating device for improving the combustion efficiency of a hot blast stove. The preheating device comprises a coal gas preheater and an air preheater, and is characterized in that a waste gas generated from the hot blast stove is divided into two paths by a waste gas pipeline, is respectively connected with the coal gas preheater and the air preheater, and is finally discharged out from a chimney; the coal gas and the air are respectively fed into the coal gas preheater and the air preheater through the coal gas pipeline and the air pipeline to have heat exchange with the gas so as to obtain heat energy, and after the temperature is increased, the coal gas and the air are fed into the hot blast stove. The preheating device for improving the combustion efficiency of the hot blast stove, which is disclosed by the utility model, adopts the rest heat of the waste gas to preheat the coal gas and the air, and the combustion efficiency of the coal gas is improved, and the energy power of the hot blast stove is improved.
Description
Technical field
The utility model relates to the hotblast stove in steel-making industry, relates in particular to a kind of primary heater unit that improves Combustion of Hot Air Furnace efficiency.
Background technology
Hotblast stove is one of main supporting equipment of Iron Works, and effect is to the temperature requiring, in order to improve the returns and efficiency of blast furnace blast heating.Heat accumulating type checker brick hotblast stove is current modern blast furnace, the most frequently used hotblast stove form of especially large blast furnace, and it is by the work of " accumulation of heat " principle.The coal gas that burns in combustion chamber, high-temp waste gas is by checker brick and make it accumulation of heat, and after checker brick fully heat, hotblast stove just can change air-supply into, and now relevant each valve of burning cuts out, and each valve of blowing is opened, and cold wind is heated and sends through checker brick.Blast furnace is equipped with 3-4 seat hotblast stove, during single stove air-supply, and two or three heating, an air-supply, changes in turn; During air-supply in parallel, two heating.
Yet existing hotblast stove is when its work, and coal gas and air mixed burning tend to burn insufficient, produce a large amount of carbon monoxide, contaminate environment not only, affect staff's physical appearance, but also cause mass energy to waste, greatly improved production cost.
Utility model content
The technical assignment of technical problem to be solved in the utility model and proposition is that prior art is improved, a kind of primary heater unit that improves Combustion of Hot Air Furnace efficiency is provided, the coal gas and the air mixed burning that solve hotblast stove in current technology are insufficient, cause energy dissipation, the problem of contaminate environment.
For solving above technical problem, the technical solution of the utility model is:
A kind of primary heater unit that improves Combustion of Hot Air Furnace efficiency, comprise gas preheater and air preheater, it is characterized in that, the waste gas producing in hotblast stove separates two-way by exhaust pipe and is connected respectively to gas preheater and air preheater, finally by chimney, discharged, coal gas and air are entered in gas preheater and air preheater and are carried out after heat exchange obtains heat energy raising temperature entering hotblast stove with waste gas again by gaspipe line and airline respectively.The waste gas residual heat that the utility model utilizes hotblast stove to produce heats to coal gas and air, recycle the energy of waste gas, the maximized utilization ratio that improves the energy, after coal gas and the air mode by heat exchange heats up, enter in hotblast stove and burn again, preheating can improve the efficiency of combustion of coal gas and air, thereby obtain more heat, improve the usefulness power of hotblast stove, after gas-fired fully, can not produce a large amount of carbon monoxide yet, thereby alleviated the pollution to environment, also avoided staff to cause actual bodily harm simultaneously.
Further, described gaspipe line adopts a direct sending pipeline to be directly connected to hotblast stove, before and after outputing on direct sending pipeline, two arms are connected to gas preheater, and gas valve I and gas valve II on two arms, have respectively been installed, and installed gas valve III on the direct sending pipeline between two arms, by controlling gas valve I, gas valve II and gas valve III, thereby control coal gas, be to enter hotblast stove after directly sending into hotblast stove or entering gas preheater heating, the handiness that increases preliminary heating device adapts to the needs of producing again.
Further, described airline adopts a direct sending pipeline to be directly connected to hotblast stove, before and after outputing on direct sending pipeline, two arms are connected to air preheater, and air door I and air door II on two arms, have respectively been installed, and installed air door III on the direct sending pipeline between two arms, by pilot air valve door I, air door II and air door III, thereby control air, be to enter hotblast stove after directly sending into hotblast stove or entering air preheater heating, the handiness that increases preliminary heating device adapts to the needs of producing again.
Further, described exhaust pipe is provided with in line pipeline and is connected to chimney, and be provided with waste gas valve I and control break-make, in the bypass line being connected with air preheater with gas preheater, be provided with waste gas valve II, waste gas valve III, waste gas valve IV and waste gas valve V, by controlling, thereby respective valves is controlled coal gas and whether air heats, and adapts to need of production.
Compared with prior art, the utility model advantage is:
The primary heater unit of raising Combustion of Hot Air Furnace efficiency described in the utility model utilizes the waste heat of waste gas to preheat coal gas and air, improves the efficiency of combustion of coal gas, thereby can improve the usefulness power of hotblast stove, enhances productivity; The utility model has maximized the utilising efficiency of the energy, avoids producing a large amount of carbon monoxide, reduces the pollution of exhaust gas of hot-blast stove to environment; The utility model is simple in structure, is easy to realize, and low cost of manufacture, economical efficiency is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
The disclosed a kind of primary heater unit that improves Combustion of Hot Air Furnace efficiency of the utility model embodiment, heats the coal gas and the air that enter hotblast stove in advance, improves efficiency of combustion, thereby improves the utilization ratio of the energy, reduces pollution on the environment.
As shown in Figure 1, improve a primary heater unit for Combustion of Hot Air Furnace efficiency, comprise gas preheater 1 and air preheater 2, the waste gas that hotblast stove produces enters exhaust pipe 3, exhaust pipe 3 is provided with in line pipeline and is connected to chimney 6, and is provided with waste gas valve I13 control break-make; And exhaust pipe 3 also separates two-way and is connected respectively to gas preheater 1 and air preheater 2, in the bypass line being connected with air preheater 2 with gas preheater 1, be provided with control and whether carry out the waste gas valve II14 of preheating, waste gas valve III15, waste gas valve IV16 and waste gas valve V17.Close waste gas valve II14, waste gas valve III15, waste gas valve IV16 and waste gas valve V17, open waste gas valve I13, waste gas is directly discharged in chimney; If close waste gas valve I13, open waste gas valve II14, waste gas valve III15, waste gas valve IV16 and waste gas valve V17, waste gas enters air preheater 1 and air preheater 2 carries out being discharged into chimney 6 after heat exchange again.
Coal gas and air are entered in gas preheater 1 and air preheater 2 and are carried out after heat exchange obtains heat energy raising temperature entering hotblast stove with waste gas again by gaspipe line 4 and airline 5 respectively.
Gaspipe line 4 adopts a direct sending pipeline to be directly connected to hotblast stove, before and after outputing on direct sending pipeline, two arms are connected to gas preheater 1, and on two arms, respectively installed gas valve I7 and gas valve II8, and installed gas valve III9 on the direct sending pipeline between two arms.Turn on the gas-fire valve I7 and gas valve II8, close gas valve III9, and coal gas enters in gas preheater 1 and is transported in hotblast stove after preheating again; The valve III9 if turn on the gas-fire, closes gas valve I7 and gas valve II8, and coal gas is delivered directly in hotblast stove and burns.
Airline 5 adopts a direct sending pipeline to be directly connected to hotblast stove, before and after outputing on direct sending pipeline, two arms are connected to air preheater 2, and on two arms, respectively installed air door I10 and air door II11, and installed air door III12 on the direct sending pipeline between two arms.Open air door I10 and air door II11, close air door III12, air enters in air preheater 2 and is transported in hotblast stove after preheating again; If open air door III12, close air door I10 and air door II11, air is delivered directly in hotblast stove.
The waste gas residual heat temperature of hotblast stove is about 250 ℃, by heat exchange, can, by coal gas and air heating to 150 ℃-180 ℃ (normal temperature is 40 ℃ of left and right), effectively improve efficiency of combustion.
Below be only preferred implementation of the present utility model, it should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with claim limited range.For those skilled in the art, within not departing from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a primary heater unit that improves Combustion of Hot Air Furnace efficiency, comprise gas preheater (1) and air preheater (2), it is characterized in that, the waste gas producing in hotblast stove separates two-way by exhaust pipe (3) and is connected respectively to gas preheater (1) and air preheater (2), finally by chimney (6), discharged, coal gas and air are entered in gas preheater (1) and air preheater (2) and are carried out after heat exchange obtains heat energy raising temperature entering hotblast stove with waste gas again by gaspipe line (4) and airline (5) respectively.
2. the primary heater unit of raising Combustion of Hot Air Furnace efficiency according to claim 1, it is characterized in that, described gaspipe line (4) adopts a direct sending pipeline to be directly connected to hotblast stove, before and after outputing on direct sending pipeline, two arms are connected to gas preheater (1), and respectively installed gas valve I(7 on two arms) and gas valve II(8), and installed gas valve III(9 on the direct sending pipeline between two arms), whether by by-pass valve control, control coal gas needs preheating.
3. the primary heater unit of raising Combustion of Hot Air Furnace efficiency according to claim 1, it is characterized in that, described airline (5) adopts a direct sending pipeline to be directly connected to hotblast stove, before and after outputing on direct sending pipeline, two arms are connected to air preheater (2), and respectively installed air door I(10 on two arms) and air door II(11), and installed air door III(12 on the direct sending pipeline between two arms), whether by by-pass valve control, control air needs preheating.
4. the primary heater unit of raising Combustion of Hot Air Furnace efficiency according to claim 3, it is characterized in that, described exhaust pipe (3) is provided with in line pipeline and is connected to chimney, and be provided with waste gas valve I(13) control break-make, in the bypass line being connected with air preheater (2) with gas preheater (1), be provided with the waste gas valve II(14 whether control carries out preheating), waste gas valve III(15), waste gas valve IV(16) and waste gas valve V(17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320868752.0U CN203715661U (en) | 2013-12-26 | 2013-12-26 | Preheating device for improving combustion efficiency of hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320868752.0U CN203715661U (en) | 2013-12-26 | 2013-12-26 | Preheating device for improving combustion efficiency of hot blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203715661U true CN203715661U (en) | 2014-07-16 |
Family
ID=51154829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320868752.0U Expired - Lifetime CN203715661U (en) | 2013-12-26 | 2013-12-26 | Preheating device for improving combustion efficiency of hot blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203715661U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488771A (en) * | 2017-09-29 | 2017-12-19 | 四川德胜集团钒钛有限公司 | A kind of blast-furnace hot-air furnace system |
-
2013
- 2013-12-26 CN CN201320868752.0U patent/CN203715661U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488771A (en) * | 2017-09-29 | 2017-12-19 | 四川德胜集团钒钛有限公司 | A kind of blast-furnace hot-air furnace system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |