CN202630393U - Multi-stage convection indirect blast stove - Google Patents
Multi-stage convection indirect blast stove Download PDFInfo
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- CN202630393U CN202630393U CN 201220263015 CN201220263015U CN202630393U CN 202630393 U CN202630393 U CN 202630393U CN 201220263015 CN201220263015 CN 201220263015 CN 201220263015 U CN201220263015 U CN 201220263015U CN 202630393 U CN202630393 U CN 202630393U
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Abstract
The utility model provides a heat device which capable of directly isolating and converting fuel burning heat into air sensible heat through a stove body, and in particular relates to a multi-stage convection indirect high-temperature blast stove. The blast stove comprises a combustion furnace and a tubular recuperative furnace, wherein a burner is arranged outside the combustion furnace, a lower gas collection tank is arranged on the upper part of the combustion furnace, and connected with the recuperative furnace to form a blast stove body with a vertical structure; the blast stove body is sequentially provided with a combustion section, a high-temperature radiation section, a convection section and a flue from the bottom to the top; the convection section is divided into four stages of convection sections from the bottom to the top, namely a fourth stage convection section, a third stage convection section, a second stage convection section and a first stage convection section, and each section of the four stages of convection sections respectively consists of a convection pipe assembly; each convection pipe assembly is made of a corrugated tube respectively, wherein the fourth stage convection section is connected with an upper gas collection tank, the first stage convection section is connected with the flue, and the first stage convection section is provided with a cold air inlet. The pipe assemblies inside the four stages of convection sections of the blast stove are made of a heat-resistance steel material; and four stages have sufficient convection heat exchange along with high heat utilizations, so that energy is saved, heat efficiency of thermal equipment is improved, and exhaust of harmful gas is reduced.
Description
Technical field
The utility model relates to a kind ofly directly isolates the heat energy apparatus that converts the air sensible heat into, particularly a kind of multistage convection current indirect type high temperature hot-blast furnace with fuel combustion heat through furnace binding.
Background technology
At present, in some heat energy apparatus, because the requirement of heating process, the required burning furnace temperature that reaches is very high, therefore need be to combustion air or gas-preheating.Behind air or the gas-preheating; Can improve the theoretical temperature combustion of fuel; The general every raising of air preheating temperature can improve about 50 ℃ of theoretical temperature combustions for 100 ℃, improve the theoretical temperature combustion of fuel after furnace temperature also and then improve, from and improve the production capacity of stove.And 100 ℃ of every raising air preheating temperatures, capable of saving fuel about 5%, be the effective energy-saving means, the investment payback time is short, and high economic benefit is arranged.Can improve efficiency of combustion after the air preheat, and can reduce smoke discharge amount, help protecting environment.Existing hot air generator is transversary, and the making of the most use of its heat convection part light pipes, and the coefficient of heat transfer is low, and the thermal efficiency is low, can not satisfy production requirement, wastes energy.Under the common requirement of scientific technological advance and market economy, the device that can produce a large amount of clean hot blasts is just ready to appear.
Summary of the invention
The utility model is can not produce deficiencies such as hot blast, contaminated environment, the thermal efficiency of a large amount of cleanings is low to existing hot air generator, and a kind of multistage convection current, thermal efficiency height, waste heat recovery rate height, safety and environmental protection, multistage convection current indirect type hot-blast stove simple for structure are provided.
Realize that the technical scheme that above-mentioned purpose adopts is: a kind of multistage convection current indirect type hot-blast stove, comprise combustion furnace, pipe type heat transfer stove, burner is equipped with in the combustion furnace outside; Plenum chamber is equipped with down on top; Following plenum chamber is connected with recuperative furnace, constitutes the hot-blast furnace body of vertical structure, and hot-blast furnace body is disposed with burning zone, hyperthermia radiation section, convection section, flue from lower to upper; Described convection section is divided into the 4th, the 3rd, second, the first level Four convection section from lower to upper; Be made up of the convection tube group respectively for every section of the level Four convection section, the convection tube group uses bellows tube to make respectively, and wherein fourth stage convection section is connected with last plenum chamber; First order convection section is connected with flue, and first order convection section is provided with cold air inlet.
As preferred version, the inner tube group of described fourth stage convection section is made up of the bellows tube of 25Ni20 heat resisting steel material, and the inner tube group of the 3rd, second, the 1 grade of convection section is made up of the bellows tube of carbon steel material respectively.
As preferred version, described hot-blast furnace body is a vertical structure.
Adopt technique scheme, compared with prior art, the utility model is designed to vertical structure with combustion furnace and recuperative furnace disjunctor, and the thermal efficiency is high, and simple in structure, floor space is little.The combustion furnace of body of heater is provided with burner, and recuperative furnace comprises hyperthermia radiation section, level Four convection section and flue.The thermal-flame that fuel combustion produces, the radiant section through recuperative furnace carries out noncontact and conducts heat, and hot flue-gas temperature is reduced; Get into convection section then, the pipe group of whole convection section adopts bellows tube, has increased the heat transfer coefficient of heat exchanger; Heat-transfer effect is good; The preheat temperature of gas is higher, and in order to improve the service life of this hot-blast stove, the inner Guan Zujun of the utility model fourth stage convection section adopts 25Ni20 heat resisting steel material.The level Four heat convection is abundant, absorbs the combustion heat, thereby improves the temperature of self, reaches the purpose that improves sensible heat (500-600 ℃).Flue control fire box temperature, when the flue gas heat that combustion furnace is produced makes full use of, the service life of improving recuperative furnace.The utility model heat utilization ratio is high, and energy savings improves the thermal efficiency of Thermal Equipment, and reduces discharge of harmful gases.
Description of drawings
Fig. 1 is the utility model overall structure sketch map.
Fig. 2 is the utility model radiation segment structure sketch map.
Fig. 3 is the utility model convection section structural representation.
Among the figure: burner 1, combustion furnace 2, following plenum chamber 3, hyperthermia radiation section 4, last plenum chamber 5; Hot-blast outlet 6, fourth stage convection section 7, third level convection section 8, second level convection section 9, first order convection section 10; Mix air pipe line 11, flue 12, cold air inlet 13, heat-preservation cotton 14; Mix wind blower fan 15, radiant section pipe group 16, radiant section helical baffle 17, convection section tube bank 18.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Present embodiment is a kind of multistage convection current indirect type hot-blast stove; This indirect type hot-blast stove; Form by combustion furnace and recuperative furnace; Be to be fuel with fuel gas or flammable liquid, fuel combustion heat is directly isolated a kind of high temperature hot-blast furnace that converts the air sensible heat into through furnace binding, its structure is seen accompanying drawing 1-3.
See accompanying drawing 1, combustion furnace 2 is positioned at the below of recuperative furnace, and recuperative furnace is that tubular structure and combustion furnace 2 connect as one, and constitutes the hot-blast furnace body of vertical structure, and according to arranging of pipe, hot-blast furnace body is burning zone, hyperthermia radiation section and convection section from lower to upper successively.
Burner 1 is equipped with in the outside of forming the combustion furnace 2 of burning zone, and plenum chamber 3 is equipped with down on combustion furnace 2 tops, and following plenum chamber 3 links to each other with recuperative furnace.
Hyperthermia radiation section 4 is made up of radiant section pipe group 16; These radiant section pipe group 16 outer layer of metal plates that are surrounded by, the outer dish of metallic plate has radiant section helical baffle 17, is provided with one deck carbon steel steel plate and wraps up heat-preservation cotton 14 outside the radiant section helical baffle 17; Plenum chamber 5 is housed on the hyperthermia radiation section 4; Last plenum chamber 5 is provided with hot-blast outlet 6, and last plenum chamber 5 is connected with convection section, and the lower end of hyperthermia radiation section 4 is connected with following plenum chamber 3.The structure of the hyperthermia radiation section 4 of present embodiment is seen accompanying drawing 2; Hyperthermia radiation section 4 inside are made up of the radiant section pipe group 16 of two circle 25Ni20 heat resisting steel materials; The radiant section pipe group 16 outer steel plates that are surrounded by one deck 25Ni20 heat resisting steel material; The outer dish of steel plate has radiant section helical baffle 17, and radiant section helical baffle 17 outer fixed one deck carbon steel steel plates also wrap up heat-preservation cotton 14.
See Fig. 1; Fig. 3; Convection section is divided into from lower to upper: fourth stage convection section 7, third level convection section 8, second level convection section 9, first order convection section 10, every section of the level Four convection section form by convection section tube bank 18, and wherein fourth stage convection section 7 is connected with last plenum chamber 5; First order convection section 10 is connected with flue 12, and first order convection section 10 is provided with cold air inlet 13.The inner tube group of the fourth stage convection section 7 of present embodiment is made up of the bellows tube of 25Ni20 heat resisting steel material respectively, and the inner tube group of its excess-three level convection section is made up of the bellows tube of carbon steel material.
See Fig. 1, mix wind blower fan 15 inlets and link to each other with flue 12, mix 15 outlets of wind blower fan and link to each other with combustion furnace 2 through mixing air pipe line 11 through mixing air pipe line 11.
The hot-blast furnace body body of heater external packets of present embodiment is wrapped with heat-preservation cotton 14
.
The operation principle of the utility model is:
Fuel burns in combustion furnace 2 via burner 1, produces the great amount of high-temperature flue gas, and high-temperature flue gas gets into hyperthermia radiation section 4, carries out radiant heat transfer; Flue gas gets into fourth stage convection section 7, third level convection section 8, second level convection section 9 and first order convection section 10 successively, carries out heat convection; Flue gas gets into flue 12, mixes wind blower fan 15 hot flue gas is extracted out from flue 12, sends in the combustion furnace 2, controls fire box temperature, avoids reducing because of fire box temperature is too high the service life of each section of recuperative furnace; Unnecessary flue gas (temperature is lower than 150 ℃) is via flue 12 dischargings.This process is the flow direction of high-temperature flue gas.
Meanwhile; Cold air gets into first order convection current (heat exchange) section 10 via cold air inlet 13; Get into second level convection section 9 from the right side by external connecting pipe, being turned back from the left side by external connecting pipe gets into third level convection section 8 again, and turning back then gets into fourth stage convection section 7; Get into hyperthermia radiation section 4 from fourth stage convection section 7 back of coming out; Air gets into down plenum chamber 3 around radiant section helical baffle 17 mode in the shape of a spiral, passes radiant section pipe group 16 by following plenum chamber 3 again and gets into upward plenum chamber 5, sends into the user by hot-blast outlet 6 again.
The level Four convection section combines the mode of cross-flow to form the adverse current preheater; The pipe group 18 of whole convection section adopts bellows tube; Increased the heat transfer coefficient of heat exchanger, heat-transfer effect is good, and the preheat temperature of gas is higher; In order to improve the service life of this hot-blast stove, the utility model fourth stage convection section 7 inner pipe groups 18 all adopt 25Ni20 heat resisting steel material.
The radiant section helical baffle 17 that hyperthermia radiation section 4 is provided with adopts the spirality kicker baffle, and the waste heat air that is got into by tangential direction is advanced by hand of helix, and the flow direction formation adverse current with high-temperature flue gas has improved convection transfer rate and reduced wall temperature; The preheated air spiral gets into plenum chamber 3 down; Enclose the last plenum chamber 5 of radiant section pipe group 16 entering of 25Ni20 heat resisting steel materials again via two of hyperthermia radiation section 4 inside; In the radiant section pipe group 16 of two circle 25Ni20 heat resisting steel materials; The flow direction of air and high-temperature flue gas is following current, makes tube wall temperature low and more even, helps reducing thermal stress and improves service life.
The utility model body of heater outer wrap heat-preservation cotton 16 makes the hot-blast stove external temperature not be higher than 60 ℃.
More than the disclosed specific embodiment that is merely the utility model; Though the utility model discloses as above with preferred embodiment; But the utility model is not limited thereto, any those skilled in the art can think variation, in design philosophy that does not break away from the utility model and scope; The utility model is carried out various changes and retouching, all should drop within the protection domain of the utility model.
Claims (3)
1. a multistage convection current indirect type hot-blast stove comprises combustion furnace, pipe type heat transfer stove, and burner is equipped with in the combustion furnace outside; Plenum chamber is equipped with down on top, and following plenum chamber is connected with recuperative furnace, constitutes hot-blast furnace body; Hot-blast furnace body is disposed with burning zone, hyperthermia radiation section, convection section, flue from lower to upper, it is characterized in that, described convection section is divided into the 4th, the 3rd, second, first from lower to upper and is total to the level Four convection section; Be made up of the convection tube group respectively for every section of the level Four convection section, the convection tube group uses bellows tube to make respectively, and wherein fourth stage convection section is connected with last plenum chamber; First order convection section is connected with flue, and first order convection section is provided with cold air inlet.
2. multistage convection current indirect type hot-blast stove according to claim 1; It is characterized in that; The inner tube group of described fourth stage convection section is made up of the bellows tube of 25Ni20 heat resisting steel material, and the inner tube group of the 3rd, second, the 1 grade of convection section is made up of the bellows tube of carbon steel material respectively.
3. multistage convection current indirect type hot-blast stove according to claim 1 is characterized in that described hot-blast furnace body is a vertical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263015 CN202630393U (en) | 2012-06-06 | 2012-06-06 | Multi-stage convection indirect blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263015 CN202630393U (en) | 2012-06-06 | 2012-06-06 | Multi-stage convection indirect blast stove |
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| Publication Number | Publication Date |
|---|---|
| CN202630393U true CN202630393U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220263015 Expired - Fee Related CN202630393U (en) | 2012-06-06 | 2012-06-06 | Multi-stage convection indirect blast stove |
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| CN (1) | CN202630393U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841348A (en) * | 2016-05-31 | 2016-08-10 | 贵州大学 | Adjustable combined heat exchanger air heating furnace and working method thereof |
-
2012
- 2012-06-06 CN CN 201220263015 patent/CN202630393U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841348A (en) * | 2016-05-31 | 2016-08-10 | 贵州大学 | Adjustable combined heat exchanger air heating furnace and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20140606 |