CN209230303U - A kind of vertical electric heating hot air circulation preheating furnace - Google Patents
A kind of vertical electric heating hot air circulation preheating furnace Download PDFInfo
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- CN209230303U CN209230303U CN201821521143.7U CN201821521143U CN209230303U CN 209230303 U CN209230303 U CN 209230303U CN 201821521143 U CN201821521143 U CN 201821521143U CN 209230303 U CN209230303 U CN 209230303U
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Abstract
The utility model discloses a kind of vertical electric heating hot air circulation preheating furnaces, it is related to industrial production machinery field, including closed vertical furnace and the bell of furnace body upper end is set, the specimen holder for storing samples is provided in furnace body, the outer side of the furnace body is provided with electric heater unit, the electric heater unit includes blast pipe and discharge pipe, high-temperature blower and electric heater are connected between blast pipe and discharge pipe side by side, described blast pipe one end connects electric heater, the other end of blast pipe extends in furnace body and is provided with gas distributor, the gas distributor is arranged in specimen holder bottom, described discharge pipe one end connects the bell outer upper ends, the discharge pipe other end connects the high-temperature blower, heat is provided by electric heating and cooperates hot wind closed-cycle system, it is uniform to have preheating, heat utilization ratio it is high and The effect of environmental protection and energy saving.
Description
Technical field
The utility model relates to arrive equipment of industrial product field, more particularly to for a kind of vertical of carbon the pre-heat treatment
Electric heating hot air circulation preheating furnace.
Background technique
Preheating furnace is a kind of by low inferior fuel (referring mainly to blast furnace gas, heating gas, the low calorie fuels such as tail gas) or sky
Gas exchanges heat in the high-temperature flue gas of heating furnace by heat exchanger, and low inferior fuel or air themperature are improved, 300- is generally arrived
800 degree.To improving the actual combustion temperature of inferior fuel or the sensible heat of air, reach low inferior fuel high-temperature calcination or its
Its technique, to substitute high-grade fuel.But it is impregnated in existing carbon product preheating production process using preheating furnace
The pre-heat treatment will lead to energy waste since capacity usage ratio is not high, and existing most of preheating furnace uses natural gas and coal
The equal energy provide heat, and can generate polluted gas needs to be handled by processing unit, cause the pre- thermal efficiency significantly under
Environment is dropped and is polluted, and some medium-sized and small enterprises lead to not the case where will appear energy shortage using carbon processing warm
Complete production, it is therefore desirable to which the novel preheating furnace of one kind can solve existing issue and satisfy the use demand.
Utility model content
The purpose of this utility model is to solve existing preheating furnace the energy such as coal, natural gas is mostly used to be heated, energy consumption is high,
Heat utilization ratio it is low and pollution environment the problem of, a kind of vertical electric heating hot air circulation preheating furnace is provided, is provided by electric heating
Heat simultaneously cooperates hot wind closed-cycle system, has the effect of uniform preheating, heat utilization ratio height and environmental protection and energy saving.
In order to achieve the goal above, the technical solution adopted in the utility model is: a kind of vertical electric heating hot air circulation is pre-
Hot stove including closed vertical furnace and is arranged in the bell of furnace body upper end, the sample for storing samples is provided in furnace body
Product frame, the furnace body are provided with heated air circulation device outside, and the heated air circulation device includes sequentially connected discharge pipe, high temperature wind
Mechanical, electrical heater and blast pipe, described discharge pipe one end connect high-temperature blower, and the discharge pipe other end connects outside the bell
Portion upper end, described blast pipe one end connect electric heater, and the other end of blast pipe extends in furnace body and is provided with gas distribution
Device, in specimen holder bottom, described discharge pipe one end connects high-temperature blower, the discharge pipe other end for the gas distributor setting
The bell outer upper ends are connected, are formed between the discharge pipe, high-temperature blower, electric heater, blast pipe and closed furnace body
One hot air circulation circuit.
In order to advanced optimize the utility model, following technical scheme can be preferentially selected:
Preferably, the gas distributor includes cylindric distributor body, distributor body upper end interposition
It installs and is equipped with main escape pipe, the main escape pipe upper end is provided with protection cap, and the main escape pipe corresponds to the side below protection cap
Gas outlet is offered on wall, the bell inner wall is provided with the gas gathering mask of dome shape and bell top center position is opened up for connecting
Pick out the air outlet of air hose.
Preferably, the protection cap is umbrella.
Preferably, the distributor body upper end is uniformly arranged that there are four secondary escape pipe, the pair outlet duct structures around axis
It is identical with main escape pipe structure.
Preferably, electric heater includes heater housing and the heating tube that is arranged in heater housing, the heating
Device outer casing inner wall is additionally provided with stainless steel inner wall, and fire resistant heat preserving is filled between the stainless steel inner wall and the heater housing
Cotton layer.
Preferably, the heating tube in the heater housing is arranged there are three around stainless steel inner wall and passes through hub-and-spoke configuration
It is connected with power supply, the electric heating tube is connected separately with independent comprehensive protection device.
Preferably, the furnace interior is provided with the thermocouple one for controlling product preheating temperature, in the heater
It is provided with the thermocouple two for controlling heater heating temperature, the thermocouple one and thermocouple two are connected with controller, institute
It states controller and connects the electric heating tube.
Preferably, the bell includes frame and the Thermal insulation clay layer being embedded in frame, and the furnace body includes internal layer
Common fire brick layer and outer layer light-weight refractory insulating brick-layer.
Preferably, bell top position is corresponded on the discharge pipe be provided with the excessive pipe of gas.
The beneficial effects of the utility model are:
1, this preheating furnace uses Electric heating, guarantees that hot wind is recycled by high-temperature blower and preheats to product, passes through
The mode of convection current heat transfer, product preheating speed produce efficiently fastly, and closed furnace body guarantees preheating uniformly, front and back above and below furnace body
The left and right temperature difference is small, this preheating furnace only has a small amount of gas overflowing, electrical heating power only maintain in-furnace temperature balance environmental protection and energy saving and
Heat utilization ratio is high.
2, hot wind is uniformly sent into furnace body by air supply duct and gas distributor by this preheating furnace, and hot wind is entered by pipeline
In furnace, space becomes larger, and gas flow rate reduction is more advantageous to product and carries out heat exchange, and the bell above furnace body is equipped with gas collection
Cover, air outlet position setting in middle position, guarantee uprising gas will not bias current, distributor upper end is provided with umbrella protecting cover, has
Disperse hot-fluid by umbrella top by the special construction of umbrella conducive to gas, keeps hot-fluid slowly uniform from bottom of furnace body
Rise to shunt and guarantee preheating uniformly, and the protection cap on distributor top can prevent foreign matter from falling into distributor, prevent that pipeline is caused to hinder
Plug.
3, this preheating furnace is in addition to electric heating, the little air-introduced machine of only one power, and electric heating uses star-like connection, and every
Group is provided with comprehensive protection device, it can be achieved that unattended；By setting thermocouple one for controlling product preheating temperature, setting heat
For galvanic couple two for controlling electric heater maximum temperature in order to avoid burning out electric heating tube, the stage each group heating tube that is rapidly heated all puts into fortune
Row, it is out of service when temperature reaches the setting ceiling temperature of thermocouple two；When lower than setting lower limit temperature, operation is automatically engaged,
Enter holding stage when temperature reaches the ceiling temperature of the setting of thermocouple one, saves energy consumption.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present embodiment；
Fig. 2 is electric heater structure schematic diagram；
Fig. 3 is gas distributor structural schematic diagram；
Fig. 4 is furnace cover structure schematic diagram；
Fig. 5 is temperature control system flow chart.
Wherein, 1- furnace body, 2- bell, 3- specimen holder, 4- sample, 5- thermocouple one, 6- pedestal, 7- gas distributor, 8-
Blast pipe, 9- electric heater, 10- high-temperature blower, 11- discharge pipe, the excessive pipe of 12- gas, 13- fire resistant heat preserving cotton layer, 14- are common
Fire brick layer, 15- light-weight refractory insulating brick-layer, 16- heating tube, 17- stainless steel inner wall, 18- heater housing, 19- umbrella are protected
Protecting cover, 20- distributor body, 22- main escape pipe, the gas outlet 23-, 24- thermocouple two, 25- air outlet, 26- frame, 27- are protected
Warm argillic horizon, 28- gas gathering mask.
Specific embodiment
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
As shown in Figs. 1-5, a kind of vertical electric heating hot air circulation preheating furnace, including closed vertical furnace 1 and installation
Bell 2 in furnace body upper end, the specimen holder 3 for storing 4 product of sample is equipped in furnace body, and the outer side of furnace body is equipped with hot air circulation
Device, heated air circulation device include blast pipe 8 and discharge pipe 11, are sequentially connected between blast pipe and discharge pipe and are equipped with high temperature wind
It is set with insulating layer outside machine 10 and electric heater 9, blast pipe 8 and discharge pipe 11, guarantees that hull-skin temperature is not higher than 40 DEG C,
Guarantee the balance of furnace heat simultaneously, reduces thermal losses；8 one end of blast pipe connects electric heater 9, and the other end of blast pipe prolongs
Gas distributor 7 is extended in furnace body and is equipped with, gas distributor 7 is mounted in the pedestal 6 of support specimen holder bottom, discharge pipe
11 one end connect middle position outside bell, and 11 other end of discharge pipe connects high-temperature blower 10.Gas distributor includes cylindrical shape
Distributor body 20,20 upper end middle position of distributor body is equipped with main escape pipe 22, and 22 upper end of main escape pipe is equipped with
Umbrella protection cap 19, escape pipe correspond to and offer gas outlet 23 on the side wall below protection cap, and distributor body upper end is equal around axis
There are four secondary escape pipes for cloth installation, and outlet duct structures are identical with main escape pipe structure, and hot wind is entered furnace by gas distributor
Being conducive to gas in vivo disperses hot-fluid by umbrella top by the special construction of umbrella, makes hot-fluid slowly from furnace body bottom
Portion uniformly rises shunting and guarantees that preheating is uniform；19 lid of umbrella protection simultaneously can protect gas distributor 7, prevent from preheating
Sundries, which enters in gas distributor 7, in the process causes pipeline obstruction, and bell inner wall is equipped with the gas gathering mask 28 and furnace of dome shape
2 top center position of lid opens up the air outlet 25 for connecting discharge pipe 11, the shape of upper-part centralized gas hood 28 be conducive to air to
Bell top center position is concentrated, and 25 position of air outlet is provided with middle position, guarantee uprising gas will not bias current, bell packet
The Thermal insulation clay layer 27 for including frame 26 and being embedded in frame mitigates weight, while guaranteeing that outside heat is not higher than 40 DEG C, furnace
Lining is built using common fire brick layer 14 in vivo, and outer layer uses light-weight refractory insulating brick-layer 15, guarantees the steady of furnace body itself
Qualitative while outside heat is not higher than 40 DEG C, and outlet pipe outer wall corresponds to bell top position and is equipped with the excessive pipe 12 of gas, can permit
Perhaps a small amount of gas is discharged by excessive pipe guarantees stable gas pressure in furnace body, prevents internal pressure is excessive from device being caused to damage.
Electric heater includes heater housing 18 and the heating tube being mounted in heater housing 16, in heater housing
Wall is also equipped with stainless steel inner wall 17, filled with fire resistant heat preserving cotton layer 13 between stainless steel inner wall 17 and heater housing 18；Add
Heating tube 16 in hot device shell 18 is connected around the installation of stainless steel inner wall there are three and by hub-and-spoke configuration, guarantees three heating
Pipe 16 can individually or simultaneously be worked and make electric heater gas homogeneous heating, and heating tube 16 is connected separately with independent synthesis
Protector guarantees heating line normal operation, prevents heating tube from the emergencies such as short circuit occur, realize unattended saving people
Work；Thermocouple 1 for controlling product preheating temperature is installed at the top of furnace body, is equipped in electric heater and adds for controlling electricity
The thermocouple 2 24 of hot device maximum temperature, thermocouple 1 and thermocouple 2 24 are connected with control processor, control processor connection
Electric heating tube, the stage each group heating tube that is rapidly heated all put into operation, when to reach thermocouple 2 24 default for temperature in electric heater
Ceiling temperature when, electric heating tube stops working, lower than setting lower limit temperature when, by control processor control heating tube into
Enter work, whether come into operation together by time relay control each group electric heating tube, holding stage is that in-furnace temperature reaches heat
When the setting ceiling temperature of galvanic couple, electric heating tube enters single group operation and guarantees in-furnace temperature balance, and in order to guarantee each electric heating
The service life of pipe, each group heating tube are run by turns, and interval time is controlled by impulse timer.
The working principle of the present embodiment are as follows: after pre- hot product is placed on preheating furnace inside by specimen holder, close furnace
Lid, guarantees the airtightness of preheating furnace, simultaneously because for product preheating temperature to the thermocouple one and electricity being mounted at the top of furnace body
The thermocouple two of heater body carries out temperature setting, is equipped with outside furnace body for by entire preheating furnace internal gas circulation
High-temperature blower heats the air of circulation by the dry type electric heating tube in electric heater, is transported to by intake stack
After bottom of furnace body by gas distributor by hot wind uniformly from bottom of furnace body convey, by with the abundant heat of product on specimen holder
After exchange, the air-flow after exchange is discharged under the action of high-temperature blower along air outlet by the gas gathering mask on bell, is recycled into
Into electric heater, after reaching preheating temperature, the heating tube power in electric heater, which reduces, maintains furnace heat constant.
The present embodiment solves the dipping Preheating that part carbon production lacks clean fuel enterprise；It is also equipped with stronger
Economy, this preheating furnace only have a small amount of gas overflowing, and when preheating is in holding stage, temperature is stablized, and electrical heating power is
Heat balance is maintained, electricity consumption is seldom, and there is no hot-air discharges；Compare traditional gas-preheating furnace etc. not needing to discharge gas
Continue later period environmental protection treatment, heat utilization ratio is high, preheats the product 300-500 member power fuel energy per ton with natural gas and disappears
Consumption, it is even higher, it is 120 yuan or so with this heating method average national power grid average electricity price preheating cost per ton of pressing；Product
Preheating speed produces efficiently fastly, and product is avoided to aoxidize, and preheating is uniform；The temperature difference is small up and down for stove；Realize automatic operation, section
Less manpower；Hot wind moves from the bottom up, is conducive to flow control flow velocity easily be distributed, than stirring hot wind using gas characteristic
Machine is more suitable for larger industrial furnace production；Hot wind closed-cycle system is conducive to flue gas control, environmental protection and energy saving.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of vertical electric heating hot air circulation preheating furnace, including closed vertical furnace and the furnace of furnace body upper end is set
It covers, the specimen holder for storing samples is provided in furnace body, it is characterised in that: it is provided with heated air circulation device outside the furnace body,
The heated air circulation device includes sequentially connected discharge pipe, high-temperature blower, electric heater and blast pipe, described discharge pipe one end
High-temperature blower is connected, the discharge pipe other end connects the bell outer upper ends, and described blast pipe one end connects electric heater,
The other end of blast pipe extends in furnace body and is provided with gas distributor, and the gas distributor is arranged in specimen holder bottom,
A hot air circulation circuit is formed between the discharge pipe, high-temperature blower, electric heater, blast pipe and closed furnace body.
2. a kind of vertical electric heating hot air circulation preheating furnace according to claim 1, it is characterised in that: the gas distribution
Device includes cylindric distributor body, and distributor body upper end middle position is provided with main escape pipe, the main outlet
Pipe upper end is provided with protection cap, and the main escape pipe corresponds to and offers gas outlet on the side wall below protection cap, in the bell
Wall is provided with the gas gathering mask of dome shape and bell top center position opens up the air outlet for connecting discharge pipe.
3. a kind of vertical electric heating hot air circulation preheating furnace according to claim 2, it is characterised in that: the protection cap is
Umbrella.
4. a kind of vertical electric heating hot air circulation preheating furnace according to claim 3, it is characterised in that: the distributor shell
Body upper end is uniformly arranged around axis there are four secondary escape pipe, and the pair outlet duct structures are identical with main escape pipe structure.
5. a kind of vertical electric heating hot air circulation preheating furnace according to claim 1, it is characterised in that: electric heater includes
Heater housing and the heating tube being arranged in heater housing, the heater housing inner wall are additionally provided in stainless steel
Wall, filled with fire resistant heat preserving cotton layer between the stainless steel inner wall and the heater housing.
6. a kind of vertical electric heating hot air circulation preheating furnace according to claim 5, it is characterised in that: outside the heater
Heating tube in shell is connected with power supply, the electric heating tube difference there are three and by hub-and-spoke configuration around the setting of stainless steel inner wall
It is connected with independent comprehensive protection device.
7. a kind of vertical electric heating hot air circulation preheating furnace according to claim 1, it is characterised in that: the furnace interior
It is provided with the thermocouple one for controlling product preheating temperature, is provided in the heater for controlling heater heating temperature
Thermocouple two, the thermocouple one and thermocouple two be connected with controller, and the controller connects the electric heating tube.
8. a kind of vertical electric heating hot air circulation preheating furnace according to claim 1, it is characterised in that: the bell includes
Frame and the Thermal insulation clay layer being embedded in frame, the furnace body include internal layer common fire brick layer and outer layer lightweight it is resistance to
Fiery insulating brick-layer.
9. a kind of vertical electric heating hot air circulation preheating furnace according to claim 1, it is characterised in that: on the discharge pipe
Corresponding bell top position is provided with the excessive pipe of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821521143.7U CN209230303U (en) | 2018-09-18 | 2018-09-18 | A kind of vertical electric heating hot air circulation preheating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821521143.7U CN209230303U (en) | 2018-09-18 | 2018-09-18 | A kind of vertical electric heating hot air circulation preheating furnace |
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| CN209230303U true CN209230303U (en) | 2019-08-09 |
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| CN201821521143.7U Active CN209230303U (en) | 2018-09-18 | 2018-09-18 | A kind of vertical electric heating hot air circulation preheating furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059559A (en) * | 2018-09-18 | 2018-12-21 | 平顶山东方碳素股份有限公司 | A kind of vertical electric heating hot air circulation preheating furnace |
-
2018
- 2018-09-18 CN CN201821521143.7U patent/CN209230303U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059559A (en) * | 2018-09-18 | 2018-12-21 | 平顶山东方碳素股份有限公司 | A kind of vertical electric heating hot air circulation preheating furnace |
| CN109059559B (en) * | 2018-09-18 | 2023-09-22 | 平顶山东方碳素股份有限公司 | Vertical electric heating hot air circulation preheating furnace |
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