CN1024836C

CN1024836C - High efficient power saving medium temperature electric resistance furnace

Info

Publication number: CN1024836C
Application number: CN 89108844
Authority: CN
Inventors: 方彪
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-02
Filing date: 1989-12-02
Publication date: 1994-06-01
Anticipated expiration: 2004-12-02
Also published as: CN1052366A

Abstract

The present invention relates to a middle-temperature resistor furnace of high effect and energy saving, which belongs to a middle-temperature resistor furnace. The resistor furnace is characterized in that electric heaters are distributed on the top and both sides of a furnace chamber; the lower part of the furnace chamber is rectangular, and the upper part of the furnace chamber is a semicircular arch top; the wall surface of the furnace chamber is coated with the coating of high effect and energy saving; supporting bricks dispersed on the lower edge of a furnace opening and a furnace bottom board are heavy fire resistant bricks, the other bricks are light fire resistant bricks, and the other spaces are filled by a material of a high air hole rate; the furnace body is changed to be cylindrical shape; a furnace door is a light flap door; a gap is left between the furnace bottom board and a furnace chamber wall. Thus, the heating accumulating loss and the heat radiating loss are low, the using rate of heat radiation is high, the power rate is high, the electric consumption is low, the effect is high, and the electricity is saved.

Description

High efficient power saving medium temperature electric resistance furnace

The present invention relates to resistance furnace, relate in particular to middle temperature type resistance furnace.

As everyone knows, in economical production departments such as metallurgy, chemical industry, machine-building, the resistance furnace visual plant that is absolutely necessary.At present, China is nearly surplus in the of 30 ten thousand of the resistance furnaces of labour, and its total capacity is more than 1,500 ten thousand kilowatts.The equipment that these are outmoded, the electric power of annual waste reach more than 16,000,000,000 degree, and the China and even the world in that electric power puts upon the full stretch manufacture and design the novel high-efficiency and energy-saving resistance furnace, perhaps transform old-fashioned resistance furnace with new design, have become problem demanding prompt solution.

At present, China is at the resistance furnace of labour, and the overwhelming majority is the H type series resistance stove of Soviet Union the fifties typing and by the RJX or the RX3 type series resistance stove of its derivation, and the resistance furnace bought from Japan and American-European countries in recent years of minority.From electric cooker structure, these resistance furnaces all do not have substantial difference, so this paper is example with RJX series resistance stove, as follows to its structure and the brief analysis as a result that will cause: 1. the electric furnace heating wire (electric heater) of existing resistance furnace is distributed under the drop-bottom and the putting on the brick of burner hearth side, so with the contacted weight bearing area of electric heater, have to guarantee its elevated temperature strength with heavy refractory brick, this is to cause in the body of heater heavy refractory brick ratio up to the key factor more than 1/3, also is to cause the big major reason of accumulation of heat loss; In addition, the distribution mode of this electric heater can only make the portion of hot radiation directly be utilized, so electric furnace heats up slowly, power consumption is big.2. the bottom of existing electric stove hearth is rectangle, goes up the top radius of curvature greater than 1/2 of furnace width, this arched hearth must bring two consequences, big, the idle energy consumption of first wasted space is big, it two is to have outside side force because of the arch top, essential with the supporting of drift angle brick, not having to increase the accumulation of heat loss with fixed attention.3. existing resistance furnace burner hearth wall deals with without energy-efficient coating, mostly so radiation condition is not good enough; Even handle, also cannot say for sure to demonstrate,prove its good radiation effect on rough surface.4. the rectangle body of heater of existing resistance furnace not only exists unnecessary bigger steel and furnace lining material consumption, has also caused bigger accumulation of heat loss; Its fire door all adopts heavy refractory brick, also is the reason that causes big accumulation of heat loss.5. existing batch-type furnace fire door, it cylinder iron housing liner light fire brick form, its keying makes fire door slide up and down realization along boiler face by transmission mechanism and balancing weight, its shortcoming be airtight tight, radiation loss is big, and because of the fire door quality is big, corresponding increase is lost in accumulation of heat.To sum up brief analysis as seen.In existing the total shortcoming of temperature type resistance furnace as: because of the accumulation of heat loss with the thermal diffusion loss is big, the low intensification that causes of heat radiation utilization rate is slow, work efficiency is low, electrisity consumption is big etc., all be because the irrational inevitable outcome of furnace design.

The present invention aim to provide a kind of in the design of warm resistance furnace, reduce accumulation of heat loss, thermal diffusion loss and idle energy consumption by the reform furnace binding, improve the heat radiation condition simultaneously, improve thermal-radiating direct utilization rate, make work efficiency height, energy consumption low, with material few " warm resistance furnace in energy-efficient ".

The present invention realizes above-mentioned purpose by the General layout Plan of being made up of following subscheme: be cylindrical furnace with existing galley structural reform 1., to save the furnace material material and to reduce the accumulation of heat loss; 2. except disperseing uniformly-spaced that under drop-bottom the heavy refractory brick of some supporting drop-bottoms is set and continue to use under fire door heavy refractory brick assembles, all the other assemble the refractory brick place, and all to use density be 0.4 gram per centimeter ³Light fire brick, other space of lining is all filled out with the heat-resistant insulation material of high porosity as lead silicate fiber felt, vermiculite power, perlite, mineral wool or alumina silicate fibre silk floss etc., reduces the accumulation of heat loss as far as possible; 3. the shape of burner hearth make into the bottom be rectangle, on push up the arched hearth that the cross section radius of curvature equals 1/2 furnace width, reduce idle energy consumption to reduce the burner hearth wasted space; 4. the electric furnace heating wire string on insulated fireproof pipe or rod, with the hook suspension method it is located at top and both sides along burner hearth wall level frame, improve the direct heat radiation efficiency of electric heater; Save the drift angle refractory brick at arch drift angle place simultaneously, further reduce the accumulation of heat loss; 5. in roof of the furnace and all sidewall surfaces, the equal energy-efficient material of coated one deck, improve the heat radiation condition, improve the heat energy utilization rate, 6. fire door is made into the disc type door shell made by metal framework and iron plate and at the multiple alumina silicate fiber felt of door shell liner, make periphery elasticity lightweight fire door step and that protrude into to burner hearth is arranged, improve the seal of fire door, reduce the thermal diffusion loss; The fixed axis of this fire door by being fixed on the fire door side, the moving axis and the two ends of frame mid portion realize opening and closing with the link arm that fixed axis and moving axis are coupling respectively up and down to be contained in doorframe, and by be fixed on fire door on the arc shaped hook that is coupling of the fixed axis of lower edge and the moving axis on the doorframe block mutually and make door airtight, 15 kilowatts, 30 kilowatts stoves are advisable with single fan type stove door, 40 kilowatts and be advisable with both shoulders opposite opened fire door greater than 40 kilowatts electric furnace; 7. because the electric heater position all is higher than drop-bottom, should between drop-bottom and hearth biside wall, reserve the gap, cross passage heating furnace base plate bottom between supporting refractory brick under gap and the drop-bottom by the reflux heat air communication.Body of heater by last design manufacturing is that being placed in top is that its middle-size and small-size stove is established two seats on " trapezoidal " seat of arc surface, and Large Furnace is established three seats; Described seat and body of heater be separate or fuse.All the other all adopt prior art about the lead-out wire of electric heater and external controlled source etc., so this paper does not do numerous chatting.

In the described General layout Plan by seven sub-forecast scheme configurations, subscheme 1., 3., 4., 5., 6. can independently implement, appoint get one of them, several or whole subscheme is implemented to receive certain raising work efficiency and energy-saving effect.Described subscheme 2., 7. only 4. implement could implement as prerequisite at subscheme and is obtained desirable raising work efficiency and energy-saving effect, and 4. subscheme is the technical scheme of most critical.When the overall design scheme one that comprises seven subschemes is implemented, just can receive the power savings of best raising work efficiency.

Subscheme in the described overall design scheme 1., 3., 4., 5., 6. in any one, several or whole subscheme all be applicable to existing in the transformation of warm resistance furnace, under comprising subscheme prerequisite 4., adopt subscheme 2. and/or 7. transform existing in during warm resistance furnace, its effect is desirable; Employing comprises warm resistance furnace in the existing batch (-type) of the overall design retrofit scheme of all subschemes, its best results.

Subscheme in the above-mentioned overall design scheme 1., 2., 3., 4., 5., 7. in any one several or whole subscheme also be applicable to the design or the transformation of warm resistance furnace in the continous way.

Calculate according to theory, design in the batch (-type) of global schema manufacturing warm resistance furnace according to the present invention and compare, can improve nearly one times of work efficiency, economize on electricity more than 30% with RJX series resistance stove, economical with materials about 30%, stove heavily alleviates 40%, good looking appearance.Warm resistance furnace is compared with existing continous way resistance furnace in the continous way by the overall design conceptual design, and its work efficiency, economize on electricity, material-saving effect also will be significantly, but its weak effect is greatly different the warm resistance furnace apart from not resembling in the batch (-type).

For distinguish of the present invention energy-efficient in warm resistance furnace be warm resistance furnace in representative existing box with RJX series, feature structurally, this paper spy provides following accompanying drawing:

Warm resistance furnace lining structure front view during Fig. 1-existing is box.

Warm resistance furnace lining structure front view during Fig. 2-Ben is energy-efficient

(the B-B profile of Fig. 5)

Warm resistance furnace lining structure side view during Fig. 3-existing is box.

Warm resistance furnace lining structure side view during Fig. 4-Ben is energy-efficient.

(the A-A profile of Fig. 2)

Warm resistance furnace lining structure vertical view during Fig. 5-Ben is energy-efficient.

(Fig. 2-C-C profile)

The profile side view of warm resistance furnace during Fig. 6-Ben is energy-efficient.

The profile vertical view of warm resistance furnace during Fig. 7-Ben is energy-efficient.

The profile front view of warm resistance furnace during Fig. 8-Ben is energy-efficient.

Wherein: -heavy refractory brick;

-light fire brick;

-sil-o-cel C12;

-high porosity filler.

The 1-electric heater; 2,3-puts a brick; 1 '-electric furnace heating wire (electric heater) of string on refractory tube (rod); The 4-drop-bottom; 5,5 '-fire door; 6-stove leg; The 7-base; The 8-fixed axis; The 9-moving axis; The 10-link arm; The 11-arc shaped hook.

Claims

1, a class constitute by heavy refractory brick, light fire brick, insulation material, stove leg etc., inside is provided with warm resistance furnace in the batch (-type) of arched hearth of drop-bottom and resistance heater or the continous way series, it is characterized in that: the General layout Plan of warm resistance furnace is made up of following sub-design in energy-efficient: (1) body of heater shell is a cylindrical shape; (2) equally spaced disperse the heavy refractory brick of some supporting drop-bottoms to be set and to continue to use heavy refractory brick under fire door under drop-bottom to assemble, it is the light fire brick of 0.4 gram per centimeter that all the other bond refractory brick places all use density; (3) this burner hearth is shaped as down the arched hearth that equals 1/2 furnace width for rectangle, cross section, top radius of curvature; (4) the electric furnace heating wire string on insulated fireproof pipe or rod, with the hook suspension method it is located at top and both sides along burner hearth wall level frame; (5) in roof of the furnace and sidewall surfaces, the energy-efficient material of coated one deck; (6) the disc type door shell of this fire door for being made by metal framework and iron plate, and answer alumina silicate fiber felt at the door shell liner made the elasticity lightweight fire door that protrudes into to burner hearth that periphery has step.

2, according to claim 1 energy-efficient in warm resistance furnace, it is characterized in that: between described drop-bottom and hearth biside wall, leave the return-air gap.

3, according to claim 1 energy-efficient in warm resistance furnace, it is characterized in that: moving axis is equipped with in described fire door both sides, fixed axis is equipped with on the upper and lower edge of fire door, fixed axis and moving axis connect with link arm; Stove below 30 kilowatts adopts univalve door, and the stove more than 30 kilowatts should adopt both shoulders opposite opened fire door, and the upper and lower edge of fire door is provided with in order to can tighten the arc shaped hook of fire door moving axis.