CN2069994U

CN2069994U - Energy-saving efficient medium temperature electric resistance furnace

Info

Publication number: CN2069994U
Application number: CN 89220346
Authority: CN
Inventors: 方彪
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-02
Filing date: 1989-12-02
Publication date: 1991-01-23

Abstract

The utility model discloses an energy-saving efficient medium temperature electric resistance furnace. The utility model belongs to a medium temperature electric resistance furnace. Under the premise of retaining the existing furnace casing, the furnace frame and the furnace door of the electric resistance furnace, the medium temperature electric resistance furnace adopts the following rebuilding measures: 1. An electric heater is distributed on the top and both sides of the furnace chamber. 2. The shape of the lower part of the furnace chamber looks like a rectangle. The shape of the upper part looks like a semi-round arch top. 3. The high efficiency energy-saving paint is coated on the wall surface of the furnace chamber. 4. Besides a supporting brick which is separately arranged on the lower edge of the furnace mouth and below the base plate of the furnace adopts a heavy-weight refractory brick, the rests adopt light-weight refractory bricks totally. Materials with high porosity are filled in the other spaces. 5. The gap is provided between the base plate of the furnace and the wall of the furnace chamber. The electric resistance furnace is rebuilt into the device with high work efficiency and low power consumption.

Description

Energy-saving efficient medium temperature electric resistance furnace

The utility model relates to resistance furnace, relates 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 of .The equipment that these are outmoded, the electric power of annual waste reach more than 16,000,000,000 degree, still to the world, manufacture and design the novel high-efficiency and energy-saving resistance furnace in China that electric power puts upon the full stretch, 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, will increase the accumulation of heat loss undoubtedly.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.To sum up brief analysis is 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 utility model aim to provide a kind of in the modification scheme 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, warm resistance furnace in the active service is transformed into have the work efficiency height, " warm resistance furnace in energy-efficient " that energy consumption is low.

The utility model is under the prerequisite of warm resistance furnace grate, stove skin and fire door in keeping active service, realize above-mentioned purpose by the overall modification scheme formed by following subscheme: 1. 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; 2. 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; 3. 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 alumina silicate fiber felt, vermiculite power, perlite, mineral wool or aluminosilicate fiber cotton etc., reduces the accumulation of heat loss as far as possible; 4. 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, 5. 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.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.

Subscheme in described total modification scheme 1., 2., 4., 5. in any one, several or whole subscheme all be applicable to existing in the transformation of warm resistance furnace, 2. 3. subscheme only be embodied as prerequisite with subscheme and could implement; Under comprising subscheme prerequisite 2., adopt subscheme 3. and/or 5. transform existing in during warm resistance furnace, its effect is desirable.Employing comprises warm resistance furnace in the existing batch (-type) of total modification scheme transformation of whole subschemes, its best results.

1., 2., 3., 4., 5. subscheme in above-mentioned total modification scheme is applicable to the transformation of warm resistance furnace in the continous way too.

Calculate according to theory, compare with RJX series resistance stove, can improve nearly one times of work efficiency, economize on electricity more than 30% according to warm resistance furnace in the batch (-type) of the transformation global schema transformation of warm resistance furnace in of the present utility model.Warm resistance furnace is compared with existing continous way resistance furnace in the continous way by total modification scheme, 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 utility model 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.

(the C-C profile of Fig. 2)

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; The 5-fire door; 6-stove leg.

Claims

1, a class constitute by heavy refractory brick, insulation material, stove skin, stove leg etc., in be provided with the batch (-type) of larger radius of curvature arched hearth of drop-bottom and resistance heater or continous way series box in warm resistance furnace, of the present utility model energy-efficient in being characterised in that of warm resistance furnace: 1. 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, 2. 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; The drift angle refractory brick at original arch drift angle place is substituted with insulation material; 3. 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 alumina silicate fiber felt, vermiculite power, perlite, mineral wool and aluminosilicate fiber cotton etc.; 4. in roof of the furnace and all sidewall surfaces, equal energy-efficient materials of coated one deck; 5. 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.