CN203255972U

CN203255972U - Annular roasting oven

Info

Publication number: CN203255972U
Application number: CN2013201993277U
Authority: CN
Inventors: 张占林
Original assignee: HEBEI HAILI SPECIAL GRAPHITE MANUFACTURING Co Ltd
Current assignee: HEBEI HAILI SPECIAL GRAPHITE MANUFACTURING Co Ltd
Priority date: 2013-04-18
Filing date: 2013-04-18
Publication date: 2013-10-30
Anticipated expiration: 2023-04-18

Abstract

The utility model discloses an annular roasting oven. The annular roasting oven is composed of a plurality of oven chambers communicated in sequence, corresponding oven lids and combustion heating equipment on each oven chamber, wherein the outer wall of an oven chamber, which is not shared with other oven chambers, is formed by building refractory bricks, aluminum silicate boards and clay bricks from inside to outside in sequence; an partition wall between adjacent oven chambers is provided with a gas well communicated with two adjacent oven chambers; a flame outlet of the gas well is positioned at the upper part of the gas well; a flame inlet of the gas well is arranged at the lower part of the gas well, and is a flame path communicated with next oven chamber; each oven lid comprises a lining by taking refractory fibers and aluminum silicate boards as a heat insulation layer and an outer housing made of steel plates; the bottom of the oven is provided with supporting walls which are built by refractory bricks and used for bearing charging gaskets; passages corresponding to the flame paths for smoke and fire flowing are arranged between the supporting walls. The annular roasting oven is simple and reasonable in structure, and can be suitable for production of products in various sizes, thus reducing the application of refractory bricks, reducing the production cost, saving the energy and improving the production efficiency.

Description

A kind of ring-form calcining furnace

Technical field

The utility model relates to a kind of stoving oven, specifically the stoving oven of the chain of rings used of a kind of roasting special graphite.

Background technology

Isostatic pressing formed graphite has a series of excellent properties, such as the meticulous densification of structure, good uniformity; Thermal expansivity is very low, has excellent thermal shock resistance; Isotropy, the performance on all directions is consistent; Chemical resistance is strong, and the infiltration that is able to take molten metal and glass is corroded; Heat conductivility and conductivity are good; Have excellent machining property, almost can be processed into the article of arbitrary shape.Along with development in science and technology, isostatic pressing formed graphite is widely used in the every field such as metallurgy, chemistry, electric, aviation and nuclear power.The production of isostatic pressing formed graphite generally need to be through calcining, fragmentation, the screening of raw material, the operations such as the fusing of binding agent and batching, moulding, roasting, dipping, greying.For reaching target density, isostatic pressing formed graphite need to repeatedly flood-the roasting circulation, and the graphited cycle is compared much longer with common graphite.

Isostatic pressing formed graphite is because structure is fine and closely woven, and roasting process requires slow especially, and roasting is to carry out in stoving oven, and temperature is very even in the stove, and heat-processed is wanted careful carrying out.Isostatic pressing formed graphite be with raw materials such as coal tar, carbon dust after extrusion forming, under the temperature more than 900 ℃, through repeatedly long roasting, then process through the high temperature graphitizations of several thousand degree and make.The stove that present China is widely used in calcining process has: down-draft kiln, tunnel furnace, electric stoving oven and ring-form calcining furnace etc., wherein most typical is ring-form calcining furnace.Ring-form calcining furnace is a kind of by the join end to end stoving oven of the continuous circulation that is combined into of the identical furnace chamber of several structures, to use at present the most general carbon roasting furnace, being characterized in that furnace chamber fixes, then is periodically to move to next furnace chamber from a furnace chamber to the burning heating equipment of furnace chamber heat supply.After the raw material of manufacturing graphite is pressed into right cylinder, put into a charging basket, put into this charging basket on the furnace bottom of furnace chamber together with columned raw material, along with the movement of burning heating equipment, furnace chamber and the product that wherein needs to carry out roasting are finished the whole roasting process that then cools off gradually from low temperature to high temperature.

Each furnace chamber of ring-form calcining furnace is connected with one and Next furnace chamber on it, and it is the partition wall public with adjacent furnace chamber that the two sides is arranged in the wall of each furnace chamber, and the two sides is not public with other furnace chamber exterior wall in addition.Ring-form calcining furnace is divided into the closed of bell with without two kinds of the open types of bell.Open-type ring-type roasting furnace fuel combustion and flow of flue gas are carried out in airtight quirk.The closed ring-form calcining furnace is divided into again has the gas well formula and without two kinds of gas well formulas.Then fuel is in the gas well internal combustion if the closed ring-form calcining furnace has gas well, and the space between bell and furnace chamber is the flue of walking flue gas; If the direct space combustion below bell of fuel during without gas well only replaces gas well as passage with the rising quirk in the midfeather.

At present roasting graphite uses is closed ring-form calcining furnace with gas well, bell be adopt cast iron, channel-section steel adds refractory brick or pouring material is made; The partition wall of furnace chamber and exterior wall generally all use single a kind of laying fireproof bricks to form.The indoor laying fireproof bricks of stove cuts off into a plurality of grid spaces of six lattice or eight lattice, and grid is upwards built to fire door from furnace bottom always; The corresponding setting with grid of gas well, corresponding two grids of a general gas well.This kind stoving oven is when producing heating, warm air heats first refractory brick, refractory brick reheats stopping composition, stopping composition reheats the product in the charging basket, the degree of depth of furnace chamber or the height of grid generally have four meters nearly, and the heat that warm air loses in four meters long distances from top to bottom well imagines, in the furnace chamber from top to bottom the temperature difference roughly about 200 ℃, calorific loss has seriously reduced the production efficiency of stoving oven near 40% of total heat in process of production.And be the indoor grid of masonry heater, increased the ratio of refractory materials, improved cost, also taken the article containing space in the furnace chamber, cause the limited space in each grid, limited the Production requirement of products of different specifications.

The utility model content

It is strong and can reduce calorific loss that the utility model technical issues that need to address provide a kind of simple in structure, suitability, enhances productivity, the ring-form calcining furnace of a large amount of save energy.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:

A kind of ring-form calcining furnace, be made of several furnace chambers that are connected successively and the corresponding bell and the burning heating equipment that are positioned on each furnace chamber, described furnace chamber does not adopt refractory brick, silicate aluminum board, clay brick to be built into successively from inside to outside with the public exterior wall of other furnace chamber; Partition wall between the described adjacent furnace chamber arranges the gas well that adjacent two furnace chambers are connected, and the crater of described gas well is positioned at the top of gas well, gas well enter the bottom that burner is arranged on gas well, be the quirk that is connected with a upper furnace chamber; Described bell comprises with refractory fibre and silicate aluminum board does the liner of thermofin and the shell of being made by steel plate; Be provided with the knee wall that is used for the carrying charging basket by laying fireproof bricks on the described furnace bottom, offer the passage that supply pyrotechnics flow corresponding with quirk between the knee wall.

Further improvement of the utility model is: the knee wall bottom of described furnace bottom arranges two-layer insulating brick.

Further improvement of the utility model is: the crater place of described gas well is provided with the closure plate that the flame heat regulating that can intercept in the gas well is passed to furnace chamber.

Because the technical progress of having adopted technique scheme, the utility model to obtain is:

The utility model is simple and reasonable, and furnace chamber is applicable to the production of sizes product, has reduced the use of refractory brick, has reduced production cost, has improved production efficiency.The exterior wall of furnace chamber is built by laying bricks or stones successively according to the order of refractory brick, silicate aluminum board and clay brick from inside to outside and is formed, refractory brick has prolonged the work-ing life of stoving oven as the interior metope of furnace chamber, middle silicate aluminum board heat-insulation and heat-preservation, prevent that heat from leaking, improved thermo-efficiency, save energy has reduced heat energy loss.The crater of gas well is arranged on gas well top, enters burner and is arranged on the gas well bottom, is the quirk that is arranged on the partition wall bottom and is connected with a upper furnace chamber, is conducive at the uniform velocity heating up fast of gas well.

Bell is done shell by steel plate, and liner is the thermofin that refractory fibre and silicate aluminum board are made, and has played good insulation, heat-blocking action.When producing, the surface high-temp of bell is no more than 40 ℃, greatly reduces thermosteresis, has improved production efficiency after testing.

Furnace bottom increases two-layer insulating brick, has intercepted leaking of temperature, has strengthened the heat insulation effect of stoving oven.At furnace bottom knee wall is set, knee wall is used for placing charging basket.Offer the passage for the pyrotechnics circulation between the knee wall, when producing, heat is complied with the passage circulation, and the heating charging basket is conducive to taking full advantage of of heat.

Crater place at gas well arranges closure plate, the circulation of control heat transfer.When not needing furnace chamber heated, the flame heat regulating in the blocking-up gas well is passed to furnace chamber.

Description of drawings

Fig. 1 is synoptic diagram of the present utility model, and the direction of arrow is the direction of transfer of flame heat regulating among the figure;

Fig. 2 is the vertical view after the utility model removes bell;

Fig. 3 is the sectional view of A-A among Fig. 2.

Wherein, 1, bell, 2, furnace bottom, 3, furnace chamber, 4, partition wall, 5, gas well, 6, quirk, 7, the blocking-up wall, 8, knee wall, 9, exterior wall.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further details:

A kind of ring-form calcining furnace, structure comprise several furnace chambers 3, bell 1 and burning heating equipment as shown in Figure 1 and Figure 2.Several furnace chambers 3 are connected successively, and bell 1 is corresponding one by one with furnace chamber 3.

Described bell 1 is comprised of shell and liner, and its housing is made by steel plate; Liner then is the thermofin that is comprised of refractory fibre and silicate aluminum board.Be provided with knee wall 8 on the furnace bottom 2, described knee wall 8 is formed by laying fireproof bricks, is used for the charging basket that raw material is equipped with in carrying.Offer corresponding with quirk 6 passage that flows for pyrotechnics between the knee wall 8.Knee wall 8 bottoms at furnace bottom 2 arrange two-layer insulating brick.

Described furnace chamber 3 is formed by two sides exterior wall 9 and two sides partition wall 4 brick works, does not wherein adopt refractory brick, silicate aluminum board, clay brick to be built into successively from inside to outside with the public exterior wall 9 of other furnace chamber 3.Be provided with gas well 5 in the public partition wall 4 between the described adjacent furnace chamber 3.The crater of described gas well 5 is positioned at the top of gas well 5; Gas well 5 enter the bottom that burner is arranged on gas well 5.Entering burner is quirk 6, and quirk 6 is for being arranged on the lower passage of partition wall 4, and cross section is circular, and gas well 5 is connected with a upper furnace chamber via quirk 6, and then is communicated with adjacent two furnace chambers 3.Crater place at gas well 5 also is provided with closure plate, when not needing furnace chamber 3 heated, can be passed to furnace chamber 3 by the flame heat regulatings that closure plate intercept in the gas well 5.

Described gas well 5 is separated into three parts by blocking-up wall 7, structure such as Fig. 2, shown in Figure 3, and in the bottom of partition wall 4, three parts respectively correspondence offer three sections quirks 6, and the cross section of quirk 6 is circular.Three cover burning heating equipment boccas can be set so simultaneously, be beneficial at the uniform velocity heating up fast of gas well 5.The end face of blocking-up wall 7 is lower than the end face of partition wall 4, no matter be to use burning heating equipment to carry out in the heat-processed or when stopped heating is incubated, can guarantee 5 whole connections of gas well like this, guarantees that the temperature in the gas well 5 is even.

Claims

1. ring-form calcining furnace, by several furnace chambers that are connected successively (3) be positioned at corresponding bell (1) on each furnace chamber (3) and burning heating equipment consists of, it is characterized in that: not public with other furnace chamber exterior wall (9) of described furnace chamber (3) adopts refractory brick, silicate aluminum board, clay brick to be built into successively from inside to outside; Partition wall (4) between the described adjacent furnace chamber (3) arranges the gas well (5) that adjacent two furnace chambers (3) are connected, the crater of described gas well (5) is positioned at the top of gas well (5), gas well (5) enter the bottom that burner is arranged on gas well (5), be the quirk (6) that is connected with a upper furnace chamber; Described bell (1) comprises with refractory fibre and silicate aluminum board does the liner of thermofin and the shell of being made by steel plate; Be provided with the knee wall (8) that is used for the carrying charging basket by laying fireproof bricks on the described furnace bottom (2), offer the passage that supply pyrotechnics flow corresponding with quirk (6) between the knee wall (8).

2. a kind of ring-form calcining furnace according to claim 1, it is characterized in that: knee wall (8) bottom of described furnace bottom (2) arranges two-layer insulating brick.

3. a kind of ring-form calcining furnace according to claim 1 is characterized in that: the crater place of described gas well (5) is provided with the closure plate that the flame heat regulating that can intercept in the gas well (5) is passed to furnace chamber (3).