CN2179962Y - Continuous circulating heat treating furnace - Google Patents
Continuous circulating heat treating furnace Download PDFInfo
- Publication number
- CN2179962Y CN2179962Y CN 92234774 CN92234774U CN2179962Y CN 2179962 Y CN2179962 Y CN 2179962Y CN 92234774 CN92234774 CN 92234774 CN 92234774 U CN92234774 U CN 92234774U CN 2179962 Y CN2179962 Y CN 2179962Y
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- conveyer belt
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Abstract
The utility model relates to a heat-treating furnace for heating an aluminium ingot or other non-ferrous metal cylinder bodies, comprising a furnace chamber whose furnace wall is coated with heat-insulating materials, wherein, the furnace chamber is provided with a tilting conveyer belt, a feeding door and a return door. When the tilting conveyer belt, the feeding door and the return door are synchronously switched on in an intermittent way, the materials to be heated continuously ranged on the furnace bed are rolled forward due to gravity to make the circumference surface heated on average. The hot air current generated by a burner is heated at a heat-storing chamber and then enters the furnace chamber through the symmetrical positions of both ends of the furnace chamber to heat the materials to be heated. The middle segment of the furnace chamber is provided with at least a circulating air exhauster for extracting the hot current at the furnace chamber and then into the heat-storing chamber.
Description
The utility model is about a kind of industrial oven in order, particularly about a kind of continuous circulating heat-treatment furnace in order to heating aluminium ingot or its cylinder nonferrous metal.
Generally be divided into fuel oil heating and electric heating furnace two classes by traditional industry with heating furnace.Fuel oil heating is to utilize a burner combustion for example behind the fuel of diesel oil or liquid gas, and the thermal current guiding that is produced of will burning enters in the furnace chamber, and behind the metal material to be heated in the heated oven chamber, its waste gas enters in the atmosphere immediately.The traditional fuel oil heating of this kind is not because of carrying out suitable preheating to fuel, it is incomplete to cause its fuel combustion, and must use for example low ignition point such as diesel oil, liquid gas fuel oil, not only cause fuel cost to increase, and combustion gas is also because of incomplete combustion, and generation is as contaminant particles such as carbon monoxide and sulfide.Electric heating furnace is electric heating to be arranged heating wire be attached to the furnace wall, and after the energising, the heat energy that heating wire is produced conducts to metal material surface to be heated with radiation mode.The shortcoming of electric mode of heating is that mainly the heating-up time is long and heating is unequal, and heating wire easily fuses because of long-time heating, causes frequent SDR.Generally speaking, the time that fuel oil heating is warming up to required operating temperature is about 40～60 minutes, and the time that electric heating furnace is warming up to required operating temperature then is about 240～300 minutes.
Another significant drawbacks of above-mentioned traditional fuel oil type heating furnace and electric heating furnace is that fuel cost and grid electricity fee cost still belong to high.We lift aluminium ingot is example explanation, and the temperature when aluminium ingot is heated to suitable aluminium extruded moulding is about 450 ℃ to 500 ℃, and the specific heat of aluminium is 0.240, now calculates the required heats of aluminium ingot per ton and is to be heated to 500 ℃:
1000kg×500℃×0.240＝120，000kcal
We know that various fuel oils and electric caloric value and market price are as follows:
1. the diesel oil caloric value 10,10 yuan/kg of 300kcal/kg market price
2. liquid gas caloric value 12,15 yuan/kg of 000kcal/kg market price
3. 2 yuan/kg of electric caloric value 860kcal/kg market price
4. the low sulphur heavy oil caloric value 9,3.9 yuan/kg of 840kcal/kg market price
By it, the cost that aluminium ingot per ton is heated to 500 ℃ is respectively:
1. diesel oil is 116.5 yuan
2. 150.0 yuan of liquid gas
3. electric 279.1 yuan
4. low sulphur heavy oil is 47.5 yuan
We find that the unit cost of using electric mode of heating is far above the fuel Heating mode, and in the fuel Heating mode, the unit cost of using low sulphur heavy oil is also only for using 40% of diesel oil unit cost.When if fuel oil heating is used low sulphur heavy oil instead and is fuel, can reduce fuel cost significantly, the traditional type fuel oil heating is not because of carrying out suitable preheating to fuel, and the heat circulating system design is bad in its stove, pyrogenicity efficient is on the low side, and can't be its fuel with the higher low sulphur heavy oil replacement low ignition point diesel oil of burning-point.
Moreover, tradition fuel oil heating and electric heating furnace are on the conveying device of its material to be heated, be to use electric conveying device with chain drive, chain bear load-carrying and by stove in temperature when being heated to the condition of high temperature, each chain link of chain differs because of be heated inequality and heavy burden, and it is irregular to cause its degree of tightness, and easily produces the disconnection situation, spoilage is higher, often must the blowing out maintenance.Two general laminar heating furnaces then must be carried material to be heated by the workman and be stacked and placed on the chain conveyor, when coming out of the stove, also need to hold out heating material under the arm by the workman, increase cost of labor, and reduce the operating efficiency of heating furnace.
This shows that a kind of heating furnace that must use low sulphur heavy oil fuel and can improve heat exchanger effectiveness is still industrial personage institute active demand.
The purpose of the utility model, promptly be to provide a kind of continuous circulating heat-treatment furnace in order to heating aluminium ingot or other cylinder nonferrous metal, it is with the thermal current in the circulating air exhauster extraction stove, send back to again in the regenerator, has Waste Heat Recovery, temperature-averaging and impel the effect of fuel completing combustion in the stove.
A time purpose of the utility model is the continuous circulating heat-treatment furnace that is to provide above-mentioned pattern, and it can use low sulphur heavy oil to be fuel, uses and reduces fuel cost significantly.
Another purpose of the utility model is the continuous circulating heat-treatment furnace that is to provide above-mentioned pattern, and it is minimized exhaust pollution.
The another purpose of the utility model, it is the continuous circulating heat-treatment furnace that is to provide above-mentioned pattern, it uses the tilting conveyer belt and the materials device of advancing and retreat automatically, and each periphery of material to be heated is heated on average, and can reduce the conveying device spoilage and reduce cost of labor.
According to continuous circulating heat-treatment furnace of the present utility model, comprising:
One is coated with the furnace chamber of heat-barrier material, and this furnace chamber has middle section position and two ends; Produce several burners of thermal current in order to combustion fuel;
The regenerator that several are communicated with a burner respectively,
These regenerator are about to the heating of this thermal current earlier, and guide this hot gas to enter in the furnace chamber from the two ends of this furnace chamber respectively;
At least one is located at the air exhauster on this furnace chamber middle section position, and this air exhauster forces these thermal currents fragment position among furnace chamber to flow in order to aspirate the thermal current that enters furnace chamber from two ends;
The circulation line that is communicated with this air exhauster and each regenerator uses that the thermal current by the air exhauster suction is recycled in each regenerator;
Be located at the natural exhaust blast pipe at these furnace chamber two ends; And
Conveying device is in order to send into material to be heated in the furnace chamber and to withdraw from outside the furnace chamber.
See also the detailed description of following relevant the utility model one preferred embodiment and graphic, should be able to further understand the structural feature and the technology contents of the utility model.
Fig. 1 is one of the continuous circulating heat-treatment furnace of a utility model fragmentary cross-sectional view;
Fig. 2 is the amplification profile that the 2-2 line in Fig. 1 is made; And
Fig. 3 is the end face view of this continuous circulating heat-treatment furnace.
See also accompanying drawing, the continuous circulating heat-treatment furnace 10 of the utility model is in order to aluminium ingot or other cylindrical nonferrous metal 80 are carried out heating process, and the aluminium ingot 80 that heats of the back of coming out of the stove is delivered to processing unit (plant)s reprocessing such as extruder, cutter or casting machine again.This heat-treatment furnace 10 includes a furnace chamber 12, several burners 14 and regenerator 16, at least one stage casing air exhauster 18, siege 20, tilting conveyer belt 22, automatic feed synchronously and discharging device 24 and 26, be positioned at the natural exhaust blast pipe 28 and 30 at two ends, and thermal current circulation line 32 etc.Thermal current by each burner 14 combustion fuel is produced after the heating, according to the direction of arrow A, enters in the furnace chamber 12 from the place, nearly two ends of furnace chamber 12 in regenerator 16 earlier; 18 of air exhausters being located at the furnace chamber middle section position are in order to extract the interior thermal current of furnace chamber 12, make the thermal current that enters by two ends be compelled to flow to furnace chamber 12 central authorities, and according in the arrow B direction inflow thermal current circulation line 32, by this circulation line 32 thermal current is sent back in each regenerator 16 again, to constitute a semi-enclosed thermal current circulatory system.
When thermal current pressure is higher than a setup pressure value in the furnace chamber 12, the portion of hot air-flow must be discharged outside the thermal current circulatory system by the natural exhaust blast pipe 28 of being located at the furnace chamber two ends and 30, use the hot stream temperature and the pressure that make furnace chamber 12 inside and remain on a suitable set temperature value and a force value, and the heat exchanger effectiveness of acquisition the best.The force value of this setting must be determined by the efficiency of combustion of adjusting burner 14 and the pressure that rises of air exhauster 18.
The aluminium ingot conveying device that the heat-treatment furnace 10 of the utility model is used, also the chain transmission type conveying device with tradition is different, thereby have below will address more than function.This aluminium ingot conveying device mainly includes one or more layers and is set up in siege 20 tops and traverses the tilting conveyer belt 22 of furnace chamber 12 inside, be installed with several transversely arranged stainless shot iron 34 on this conveyer belt 22, this ball iron 34 is in order to reduce the resistance to rolling of aluminium ingot 80; Be respectively equipped with the automatic feeder 24 and the automatic discharging device 26 of electrical control formula at the two ends of conveyer belt 22; This automatic feeder 24 includes a feeding gate 36, and will be stored in the interior aluminium ingots of aluminium ingot apotheca 38 80 and lift and highly lift high device 40 to conveyer belt 22 height vertical, in order to will be pushed the horizontal propeller 42 of conveyer belt 22 by the aluminium ingot 80 of act height; This automatic discharging device 26 includes a material returned door 46, and is positioned at the material returned in front of the door in order to the liftable of temporary transient braking aluminium ingot 80 resistance ingot mechanism 48, and one in order to will withdraw from the pusher 50 that furnace chamber 12 outer aluminium ingots 80 are sent.
In the temperature rise period of heat-treatment furnace 10 startups, the cylindrical aluminium ingot 80 of dozens of is arranged on the conveyer belt 22 continuously in the mode of being right after; When furnace temperature arrives required operating temperature, when the aluminium ingot 80 to conveyer belt 22 for example successively is heated to 500 ℃ temperature required; , make to connect materials device 26 and automatic feeder 24 synchronization actions automatically by next press button (scheming not shown) by operating personnel, with withdraw from one or several heated aluminium ingot 80 to stove, and the aluminium ingot to be heated 80 of sending into equivalent is to stove.Should be by the press button of operating personnel's control, the automatic switch that also can use temperature induction type for example or timing to control formula replaces it.
In when material advance and retreat, be positioned at tilting and carry its aluminium ingot 80 on 22, because of the gravity circumference that rolls half own, so, can make each peripheries of all aluminium ingots 80 in the furnace chamber 12 all can on average accept the heating of thermal current; Simultaneously, the spoilage of this conveying device can greatly reduce, and the essential cost of labor of hand feed capable of reducing using and material returned institute.
Before circulation line 32 enters each regenerator 16, a choke 52 can be set in pipeline, this choke 52 the thermal current in the machine blocking-up circulation line 32 in due course; Be meant before the blowing out in order to rapid reduction furnace temperature the opportune moment of what is called, or when referring to other special requirements.
The furnace wall 56 that constitutes furnace chamber 12 is provided with for example heat-barrier material 54 of refractory ceramic fibre of one deck, also one deck refractory brick 60 need be set on the siege 20, and for example regenerator 16, blast pipe 28 and 30 and circulation line 32 etc. also should coat heat-barrier material, reducing the heat loss of heat-treatment furnace 10, and avoid that room temperature excessively raises in the factory.
In a preferred embodiment, this burner 14 is to use the proportion expression heavy oil burner, and air exhauster 18 is to use recirculated water toward the formula air exhauster, vertically lifts high device 40, and horizontal propeller 42 and pusher 50 all are to use the oil hydraulic cylinder pushing mechanism; In addition, each layer conveyer belt 22 is 58 support fixation of U-shaped support by the equidistant arrangement of dozens of.
The semi-enclosed thermal current circulatory system that the utility model provides comprises following function:
(1) thermal current is recyclable, reduces heat loss;
(2) after thermal current is entered by furnace chamber 12 two ends, force by stage casing air exhauster 18 and to take out, cause in the furnace chamber 12 furnace temperature and can be evenly distributed in the furnace chamber everywhere, all aluminium ingots 80 in the furnace chamber all can on average be heated, to improve heat exchanger effectiveness to the furnace chamber central flows;
(3) because of thermal current is recycled in the regenerator in 16, make burner 14 obtain abundant hot-air supply, make fuel oil and hot-air good mixing, and the effect of acquisition completing combustion;
(4) because of fuel oil is and just burning after high-temperature hot air mixes, but not the mode that the fuel oil of conventional version mixes with cold air, therefore, the burner 14 of this case can use for example contour burning-point fuel oil of low sulphur heavy oil, with the reduction fuel cost; In case of necessity, also the portion of hot air-flow in the thermal current circulation line 32 can be directed to fuel storage cabinet (scheming not shown), make fuel obtain pre-heat effect;
(5) because this case fuel is completing combustion, even if at the beginning of heat-treatment furnace 10 starts, airflow temperature by circulation line 32 loopbacks does not reach design temperature, cause in initial start stage, fuel oil does not reach completing combustion as yet, but in this stage, because of furnace chamber internal pressure value (annotate: furnace chamber internal pressure system is directly proportional with hot stream temperature), also do not surpass setting pressure, so that all enter the thermal current of furnace chamber 12 and draw back in the circulation line 32 by air exhauster 18, are not discharged by natural exhaust blast pipe 28 and 20 and there is any thermal current that contains pollution sources; Therefore, in furnace chamber 12, be warming up to design temperature, cause the stage that fuel is able to completing combustion, blast pipe 28 and 30 just has waste gas to discharge, do not contain for example pollution sources such as carbon monoxide and sulfide in the waste gas that discharged this moment, therefore, exhaust pollution can be reduced to minimum level; And
(6) as described in the preceding paragraph, handle stove 10 initial start stage in the hot cell, there is no any waste gas and discharge, in this stage, thermal current is to be in the closure recurrent state, therefore, can effectively reduce the heating-up time that furnace temperature rises to required operating temperature.
The continuous circulating heat-treatment furnace of semiclosed as mentioned above thermal current, for example can use low sulphur heavy oil etc. at a low price fuel oil be fuel oil, fuel saving cost significantly, and its thermal current is recyclable, Temperature Distribution is average in the stove, can improve heat exchanger effectiveness, and obtain completing combustion, reduce effects such as exhaust pollution and reduction heating-up time.
Claims (6)
1, a kind of continuous circulating heat-treatment furnace comprises:
One is coated with the furnace chamber of heat-barrier material, and this furnace chamber has middle section position and two ends;
Several burners produce thermal current in order to combustion fuel;
It is characterized in that also comprising:
The regenerator that several are communicated with a burner respectively;
These regenerator are about to the heating of this thermal current earlier, and guide this hot gas to enter in the furnace chamber from the two ends of this furnace chamber respectively;
At least one is located at the air exhauster on this furnace chamber middle section position, and this air exhauster forces these thermal currents fragment position among furnace chamber to flow in order to aspirate the thermal current that enters furnace chamber from two ends;
The circulation line that is communicated with this air exhauster and each regenerator uses that the thermal current by the air exhauster suction is recycled in each regenerator;
Be located at the natural exhaust blast pipe at these furnace chamber two ends; And
Conveying device is in order to send into material to be heated in the furnace chamber and to withdraw from outside the furnace chamber.
2, continuous according to claim 1 circulating heat-treatment furnace, it is characterized in that, this conveying device includes one deck at least and traverses tilting conveyer belt in this furnace chamber, in order to material to be heated being sent into the automatic feeder on this conveyer belt, and in order to should material to be heated to send the automatic discharging device on the conveyer belt; The material to be heated that is positioned on this tilting conveyer belt must roll to this automatic discharging device along this conveyer belt.
As the continuous circulating heat-treatment furnace as described in the claim 2, it is characterized in that 3, this automatic feeder and this automatic discharging device are to be controlled and synchronization action by an electric switch.
4, as the continuous circulating heat-treatment furnace as described in claim 2 or 3, it is characterized in that this automatic feeder comprises: one in order to open and close the feeding gate of this furnace chamber; One in order to store the apotheca of material to be heated; One in order to lift the material to be heated in this apotheca the high device of vertical act of delivering to this conveyer belt height; And in order to will vertical lift high device and be lifted the material to be heated that send and push horizontal propeller on the conveyer belt by this.
5, as the continuous circulating heat-treatment furnace as described in claim 2 or 3, it is characterized in that this automatic discharging device comprises: one in order to open and close the material returned door of this furnace chamber; Near this material returned door place and be positioned at the liftable resistance ingot mechanism of material to be heated on this conveyer belt in order to temporary transient braking; And a pusher in order to the material to be heated on the conveyer belt is sent.
6, continuous according to claim 1 circulating heat-treatment furnace is characterized in that, is provided with several chokes in order to blocking-up and this thermal current of conducting in this circulation line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92234774 CN2179962Y (en) | 1992-10-03 | 1992-10-03 | Continuous circulating heat treating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92234774 CN2179962Y (en) | 1992-10-03 | 1992-10-03 | Continuous circulating heat treating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2179962Y true CN2179962Y (en) | 1994-10-19 |
Family
ID=33776738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92234774 Expired - Fee Related CN2179962Y (en) | 1992-10-03 | 1992-10-03 | Continuous circulating heat treating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2179962Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225462B (en) * | 2007-01-19 | 2010-08-11 | 蒋斐祥 | Automobile wheel hub continuous heat-treating furnace |
| CN104373953A (en) * | 2014-11-14 | 2015-02-25 | 北京神雾环境能源科技集团股份有限公司 | Intelligent combustion system comprising restriction orifice plates |
| CN110983006A (en) * | 2019-12-18 | 2020-04-10 | 许益波 | Nodular cast iron annealing process |
-
1992
- 1992-10-03 CN CN 92234774 patent/CN2179962Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225462B (en) * | 2007-01-19 | 2010-08-11 | 蒋斐祥 | Automobile wheel hub continuous heat-treating furnace |
| CN104373953A (en) * | 2014-11-14 | 2015-02-25 | 北京神雾环境能源科技集团股份有限公司 | Intelligent combustion system comprising restriction orifice plates |
| CN104373953B (en) * | 2014-11-14 | 2018-09-07 | 神雾科技集团股份有限公司 | A kind of intelligent combustion system using restriction orifice |
| CN110983006A (en) * | 2019-12-18 | 2020-04-10 | 许益波 | Nodular cast iron annealing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |