CN101769687A - Energy-saving technique for recycling use of heat of work piece to be heated in industrial kiln and application thereof - Google Patents
Energy-saving technique for recycling use of heat of work piece to be heated in industrial kiln and application thereof Download PDFInfo
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- CN101769687A CN101769687A CN200910003122A CN200910003122A CN101769687A CN 101769687 A CN101769687 A CN 101769687A CN 200910003122 A CN200910003122 A CN 200910003122A CN 200910003122 A CN200910003122 A CN 200910003122A CN 101769687 A CN101769687 A CN 101769687A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses an energy-saving technique related to an industrial kiln and an application method thereof. The energy-saving technique is characterized in that a work piece to be heated is heated by heat released during the cooling process of a heated work piece, thereby raising the feeding temperature of the work piece to be heated, and since the heat is repeatedly recycled, the energy utilization rate of the kiln can be improved, thereby achieving the energy-saving purpose. The energy-saving technique is realized mainly through a direct heat exchange method and an indirect heat exchange method. The direct heat exchange method is divided into a natural air cycling method and a forced air cycling method, and is characterized in that heat exchange between a cold work piece and a hot work piece is carried out through natural air cycling or forced air cycling in one enclosed chamber. The indirect heat exchange method is characterized in that a heat storage device is communicated with a heat exchange chamber through a pipeline, the absorption of the heat of a work piece to be cooled and the release of the heat of a work piece to be heated are realized through forced air cycling forced by a fan, so as to finally complete the heat exchange of a cold work piece and a hot work piece. The condition for utilization of the heat of the work piece to be cooled is characterized in that the cooling speed of the work piece to be cooled can not be too high. For example, the work piece needs quenching.
Description
This TECHNICAL FIELD OF THE INVENTION of technical field is an industrial furnace power-saving technology in process of production.
Technical background traditional industry furnace energy-saving technology generally all is to realize by following approach: 1, utilize insulation material to improve the furnace insulation effect, reduce heat and scatter and disappear, thereby improve effective utilization rate of energy.2, adopt the novel light insulation material to reduce the amount of stored heat of stove itself, thereby improve effective utilization rate of energy.3, adopt the high efficiency burner, make full combustion of fuel, thereby improve effective utilization rate of energy.4, in Fuel Furnace, the high-temperature flue gas of utilize discharging improves by the heat-exchanger rig air distribution temperature of will burn, reduces waste heat losses, thus the raising effective utilization rate of energy.5, utilize overbottom pressure, the Yu Wen of effluent to generate electricity or as the thermal source of other heat energy demand etc., thereby improve the comprehensive utilization of energy rate.6, in the production of integrated iron and steel works, adopt hot delivery and hot charging technology, improve the charging temperature of workpiece, reduce the heat energy demand of workpiece, energy savings.The present invention has opened the brand-new technology approach in stove energy conservation field.It is applied widely, and can increase substantially the industrial furnace energy utilization rate, can produce huge economic and social benefit.
Summary of the invention the invention discloses a kind of raising industrial furnace energy utilization rate brand-new technology and implementation method.Its major technique feature is: be heated workpiece and in its cooling procedure its heat effectively utilized, mainly be to be transformed in the workpiece to be heated to go, thereby improve the charging temperature of workpiece to be heated, improve energy utilization rate, and move in circles and so forth, can reduce energy resource consumption significantly.The heat conversion for the treatment of cooling piece and to be heated mainly can realize first direct heat exchange process by two kinds of approach.In theory, the surplus temperature capacity usage ratio of this exchanged form is less than 50%, but its device structure is simple.As shown in Figure 1, 2, Fig. 1 is an air Natural Circulation direct heat exchanged form.Fig. 2 is a forced-air circulation direct heat exchanged form.Another kind is the indirect heat exchange method.In theory, the surplus temperature capacity usage ratio of this exchanged form can be near 100%.Energy-saving effect is more remarkable.As shown in Figure 3, the indirect heat exchange method need be provided with a regenerative apparatus, and regenerative apparatus is communicated with into loop with Heat Room by pipeline, provides hot air circulation power by circulating fan.Regenerative apparatus can be realized being communicated with a plurality of Heat Rooms by parallel pipeline and valve, can utilize computer realization to control automatically.Heat Room promptly can utilize heating furnace itself transformation to realize, also can be newly-built separately.The structure of regenerative apparatus as shown in Figure 4, regenerative apparatus is made up of with the separated heat-accumulating area of insulation material several.In heat exchange operation, but the different heat-accumulating area of formation temperature height can carry out heat exchange with object to be cooled to the low-temperature heat accumulating district one by one by the high-temperature heat accumulation district during heat storage heat absorption; And when heat storage and heated material heat exchange, then carry out heat exchange with heated material one by one to the high-temperature heat accumulation district by the low-temperature heat accumulating district.So just can how draw or emit heat to the greatest extent, energy-saving effect is further improved.The condition of utilizing to the heated object heat is that the technology cooling velocity of heated object can not be too fast.Such as the workpiece that requires to quench.
Description of drawings Fig. 1 is an air Natural Circulation direct heat exchanged form sketch.11-shell 12-shell heat-insulation layer 13-steelframe 14-workpiece 15-to be cooled workpiece 16-to be heated drilled base plate 17-support body wall 18-channel-section steel.Fig. 2 is a forced-air circulation direct heat exchanged form sketch.It is indirect heat exchange method sketch that 21-shell 22-thermocouple 23-controller 24-high temperature resistant fan 25-insulation material 26-workpiece 27-to be heated workpiece 28-to be cooled demarcation strip 29-channel-section steel 210-drilled base plate 211-supports piled bricks Fig. 3.The high temperature resistant blower fan 37-of the hot gas conveyance conduit 36-regenerative apparatus chamber body 38-heat storage 39-controller 310-thermocouple 311-Heat Room 312-regenerative apparatus 313-valve of the to be cooled or heated parts 35-of 31-hot gas manifold trunk with holes 32-Heat Room body 33-hot gas distributing pipe with holes 34-band heat-insulation layer.Fig. 4 is the regenerative apparatus structure diagram.41-heat-insulation layer 42-goes up locating rack 43-heat storage 44-lower support frame 45-demarcation strip 46-thermal insulation foundation 47-pipe insulating layer 48-air inlet pipe 49-control valve 410-air intake branch 411-hot gas distributing pipe with holes 412-hot gas manifold trunk with holes 413-and goes out gas branch pipe 414-escape pipe.
Specific embodiment air Natural Circulation direct heat transfer method (see figure 1): steelframe 13 is mainly used in and supports drilled base plate 16 and fixing bracket body wall 17, shell heat-insulation layer 12 both sides inwalls and fixing bracket body wall 17 leave the gap, and workpiece 14 to be cooled places on the top drilled base plate 16 on the workpiece 15 underlaid drilled base plates 16 to be heated.Utilize the hot gas come-up, cold air sinks and is power, forms the free convection heat exchange in Heat Room.It is based on convective heat exchange, and radiation heat transfer is that the heat exchange pattern of assisting is finished heat exchange.
Forced-air circulation direct heat transfer method (see figure 2): workpiece 26 to be cooled and workpiece to be heated 27 place on the drilled base plate 210, and left and right at Heat Room respectively, middle by demarcation strip 28 it is separated, hot gas forms the forced convertion circulated air and finishes exchange heat under the blowing of high temperature resistant fan 24; The thermocouple 22 that is located at the bottom of chamber top and the chamber is transferred to controller 23 with the temperature signal of gas wind.Utilize temperature gap, can finish the automatic control of heat convection easily.By revolution adjustment to high temperature resistant fan, can also control the cooling velocity of workpiece to be cooled to a certain extent, help stablizing the quality of workpiece.
Indirect heat exchange method (see figure 3): the indirect heat exchange method mainly is made up of the hot gas conveyance conduit 35 and the valve 313 of Heat Room 311, regenerative apparatus 312, high temperature resistant blower fan 36, band heat-insulation layer.Heat Room 311 can according to circumstances be formed through transformation by heating furnace, also can be newly-built.A regenerative apparatus can be realized carrying out the exchange of heat one by one with a plurality of Heat Rooms by the keying of pipeline parallel connection and valve.The power of circulated air be can control by high temperature resistant blower fan 36, the cooling of to be cooled and heated parts 34 and the speed of heating regulated within the specific limits.The detailed structure of regenerative apparatus 312 as shown in Figure 4, it mainly by heat-insulation layer 41, heat storage 43, demarcation strip 45, air inlet pipe 48, air intake branch 410, escape pipe 414, go out gas branch pipe 413 and control valve 49 is formed.Be separated into several heat-accumulating areas by demarcation strip 45 in the regenerative apparatus, each heat-accumulating area has the high and low difference of temperature.On off state control by control valve 49 needing with Heat Room to realize the respective sequence heat exchange of heat exchange object, also can reach bigger heat transfer rate, improves energy-saving effect.
Claims (9)
1. the invention discloses a kind of industrial furnace power-saving technology.It is characterized by: it is recycling to be heated the workpiece heat, mainly is to give workpiece to be heated with the waste heat heat exchange of workpiece to be cooled, and the charging temperature of workpiece to be heated is improved, and reaches the raising energy utilization rate, the purpose of energy savings.It has three kinds to use realization: a, air Natural Circulation direct heat transfer method, b, forced-air circulation direct heat transfer method, c, indirect heat exchange method.
2. according to right 1 described air Natural Circulation direct heat transfer method, it mainly is made up of shell 11, shell heat-insulation layer 12, steelframe 13, drilled base plate 16, support body space bar 17.It is characterized in that: in same airtight Heat Room, workpiece to be cooled and workpiece to be heated place Heat Room bottom and top respectively.Utilize hot gas to rise naturally, cold air drops to power naturally, and the formation natural convection air circulates and finishes exchange heat in Heat Room.
3. according to right 1 described forced-air circulation direct heat transfer method, it mainly is made up of shell 21, thermocouple 22, controller 23, high temperature resistant fan 24, heat-insulation layer 25, demarcation strip 28, drilled base plate 210.It is characterized in that: in same airtight Heat Room, workpiece to be cooled and workpiece to be heated place the left side and the right side of Heat Room respectively, and the centre is separated by demarcation strip.The heat-resisting fan that is positioned at top, chamber, right side is forced air flows downward, finishes heat convection in indoor formation air circulation.
4. according to right 1 described indirect heat exchange method, it mainly is made up of hot gas conveyance conduit 35, valve 313, the high temperature resistant blower fan 36 of regenerative apparatus 312, Heat Room 311, band heat-insulation layer.It is characterized in that: a regenerative apparatus is set, regenerative apparatus is communicated with into loop with Heat Room with the hot gas conveyance conduit, the high temperature resistant blower fan that is provided with on the pipeline is finished the release that heat storage is treated the heat extraction of cooling workpiece and treated the heated parts heat for this system provides circulation power, promptly finishes the heat exchange between workpiece.
5. according to right 2 described drilled base plates 16, it is characterized in that: upper and lower base plate is with holes, is convenient to air and passes through; Heat Room both sides inwall and support body wall 17 leave the gap, and cold air flows downward along this.
6. according to right 3 described heat exchange chamber structures, it is characterized in that: base plate 210 is with holes, is convenient to air and passes through; Thermocouple 22 is arranged in the top and the bottom of Heat Room, and the temperature signal that utilizes thermocouple to measure is easy to realize the automatic control of heat exchanging.
7. according to right 4 described regenerative apparatus 312 and Heat Rooms 311, it is characterized in that: regenerative apparatus and a plurality of Heat Room are by cooperating the switch of valve can realize the heat exchange one by one of a regenerator and a plurality of heat exchange again with the parallel connection of pipeline.
8. according to right 4 described regenerative apparatuses, it is characterized in that: the heat storage external insulation is good; Regenerative apparatus is separated into several heat-accumulating areas by insulation material, and the temperature height in each district is different.When heat exchange, should carry out one by one by the height order of temperature, heat utilization ratio is improved.
9. according to right 4 described Heat Rooms, it is characterized in that: Heat Room can also can specialized designs be built by the stove transformation is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910003122A CN101769687A (en) | 2009-01-06 | 2009-01-06 | Energy-saving technique for recycling use of heat of work piece to be heated in industrial kiln and application thereof |
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| CN200910003122A CN101769687A (en) | 2009-01-06 | 2009-01-06 | Energy-saving technique for recycling use of heat of work piece to be heated in industrial kiln and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102851678A (en) * | 2012-10-19 | 2013-01-02 | 溧阳市超强链条制造有限公司 | Metal box body capable of heating cleaning water in water box by using waste heat and heating process thereof |
| CN102967142A (en) * | 2012-08-08 | 2013-03-13 | 王文庭 | Automatic afterheat recovery device of rail kiln |
| CN103335528A (en) * | 2013-06-16 | 2013-10-02 | 苏州工业园区欣隆电热仪器有限公司 | Heat recovery system for burn-in room |
| CN103512356A (en) * | 2012-06-28 | 2014-01-15 | 邹思怿 | Energy-saving shuttle kiln and method for waste-heat utilization |
-
2009
- 2009-01-06 CN CN200910003122A patent/CN101769687A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512356A (en) * | 2012-06-28 | 2014-01-15 | 邹思怿 | Energy-saving shuttle kiln and method for waste-heat utilization |
| CN103512356B (en) * | 2012-06-28 | 2016-09-14 | 邹思怿 | A kind of energy-conservation car-bottom kiln and residual-heat utilization method |
| CN102967142A (en) * | 2012-08-08 | 2013-03-13 | 王文庭 | Automatic afterheat recovery device of rail kiln |
| CN102851678A (en) * | 2012-10-19 | 2013-01-02 | 溧阳市超强链条制造有限公司 | Metal box body capable of heating cleaning water in water box by using waste heat and heating process thereof |
| CN103335528A (en) * | 2013-06-16 | 2013-10-02 | 苏州工业园区欣隆电热仪器有限公司 | Heat recovery system for burn-in room |
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Open date: 20100707 |