CN101229978A

CN101229978A - Novel composite refractory brick applied to refractory layer of coal combustion furnace

Info

Publication number: CN101229978A
Application number: CNA2007100538762A
Authority: CN
Inventors: 张晓龙; 周圣兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-23
Filing date: 2007-01-23
Publication date: 2008-07-30

Abstract

The invention relates to novel composite refractory bricks used in a refractory layer of a coal combustion furnace, which is characterized in that high-aluminum compositions and low cement castable material and other similar material are adopted and cast under refractory temperature of 1,390 DEG C to 1,790 DEG C to finish the product; furnace mouth bricks and kindling mouth bricks are cast integrally and cast moulds are not required; the furnace mouth bricks and the kindling mouth bricks are respectively integrated into a whole with a furnace mouth and a kindling mouth. Hearth bricks and posterior wall bricks are cast brick by brick. Different numbers of reinforcement elements which are bent in an angle of 90 degrees are wielded on a surface double liner of the novel composite refractory bricks. The invention can prolong the service life of the refractory layer of the coal combustion furnace and has the advantages of low cost and convenient arrangement.

Description

A kind of novel composite refractory brick that is applied to refractory layer of coal combustion furnace

Technical field:

The present invention relates to a kind of novel composite refractory brick that is applied to refractory layer of coal combustion furnace.

Technical background:

The bituminous concrete mixing station is the large-scale professed machine equipment for making bituminous pavement process for processing asphalt, constituting the building stones of asphalt major ingredient and medium coarse sand in process of production need be dram internal heating to 160 ℃-180 ℃, heating installation is divided into fuel combustion type, gas type and coal-burning according to the difference of fuel, and is wherein economical and use coal combustion furnace the most generally.

In the formation of bituminous concrete mixing station, burning roasting kiln (frame of broken lines A) belongs to heating system, and dram (frame of broken lines B) belongs to drying system, and the former provides heat, and the latter accepts heat.The part that these two parts directly contact with flame in heat-processed is respectively the fire end that advances of the body of heater of coal combustion furnace and dram.The fire end inside of advancing of the body of heater of coal combustion furnace and dram is equipped with flame retardant coating.The flame retardant coating of body of heater is arranged on fire door, burner hearth and rear wall, and the flame retardant coating that advances fire end only is arranged on the mouth of igniting.

The present used refractory materials of flame retardant coating, general all is common alumina firebrick, this in actual use refractory brick is often by scaling loss, work-ing life is very short, simultaneously, the scaling loss of refractory brick will cause fire door, ignite mouthful and the nearly 50cm scope of dram in barrel and the isostructural serious scaling loss of material toggling bucket.This has not only influenced the normal operation of mechanical means, has also influenced construction speed, has increased cost.

The utility model content:

Purpose of the present invention is exactly the problem that exists at above-mentioned refractory layer of coal combustion furnace; a kind of novel composite refractory brick is provided; thereby the relative stability that keeps flame retardant coating to greatest extent strengthens fire door, ignite mouth and dram barrel and the isostructural effective protection of material toggling bucket.

For achieving the above object, the present invention takes following technical scheme.

Novel composite refractory brick adopts and to be rich in high aluminium component, refractory temperature at 1390 ℃-1790 ℃ low cement deposit material (or other analogous materials) castable, can the piecemeal cast, and also can be integrated poured.Adopt the stainless steel plate material to do the multiple liner plate in surface during cast; low cement deposit material is effectively protected; built-in stainless steel component is connected as a single entity mould material, stainless steel plate when integrated poured (be mould material, stainless steel plate and primary structure), strengthens the intensity and the anti-damage ability of flame retardant coating effectively.

The novel composite refractory brick that uses this kind method to produce also can be applied in the various device of flame retardant coating rapid wears such as other process furnace, cement kiln, boiler, steel-making, iron-smelting furnace.

Description of drawings:

Fig. 1 is a kind of novel composite refractory brick structural representation that is applied to refractory layer of coal combustion furnace of the present invention.

Fig. 2 is the structural representation of integrated poured novel composite refractory brick fire door brick.Wherein (a) is sectional view, (b) is vertical view.

Fig. 3 is the ignite structural representation of mouthful brick of integrated poured novel composite refractory brick.Wherein (a) is sectional view, (b) is vertical view.

Fig. 4 is piecemeal cast novel composite refractory brick structural representation.Wherein (a) is NEW TYPE OF COMPOSITE rear wall brick structure synoptic diagram, (a ₁) be front view, (a ₂) be sectional view, (b) be NEW TYPE OF COMPOSITE bosh brick structural representation, (b ₁) be front view, (b ₂) be sectional view.

Explanation shown in Figure 1:

Frame of broken lines A, burn coal incinerators frame of broken lines B, dram 1, dram 2, ignite mouthfuls 3, mouthful NEW TYPE OF COMPOSITE brick 4 of igniting, fire door 5, fire door NEW TYPE OF COMPOSITE brick 6, burner hearth 7, burner hearth NEW TYPE OF COMPOSITE brick 8, rear wall NEW TYPE OF COMPOSITE brick 9, squab panel 10, air deflector 11, interior air channel 12, outer air channel 13, oil nozzle 14, fuelpipe 15, coal dust air mixed pipe 16, the multiple liner plate 17 in back nogging surface, the multiple liner plate 18 in bosh brick surface, member (grab collude or steel bar framework etc.) 19, fire door brick water conservancy diversion ring 20, the axial ring 21 of fire door brick, the fire door brick is ring 22 radially, mouthful outer radial ring 23 of igniting, mouthful water conservancy diversion ring 24 of igniting, mouthful axial ring 25 of igniting, the radially ring of mouthful inboard of igniting.

Note: wherein 10,17,19,20,21,22,23,24,25 all is the multiple liner plate in surface.

Explanation shown in Figure 2:

1, joint flange 2, outer wall 3, inwall 4, web plate 5, axially ring 6, radially ring 7, member (grab collude or steel bar framework etc.) 8, water conservancy diversion ring 9, brick body 10, web plate

Explanation shown in Figure 3:

1, outer wall 2, joint flange 3, stiffening plate 4, brick body 5, axial radially ring 7, water conservancy diversion ring 8, member (grab collude or steel bar framework etc.) 9, outer radial ring of ring 6, inboard

Explanation shown in Figure 4:

A figure: 1, the multiple liner plate 2 in surface, member (grab collude or steel bar framework etc.) 3, brick body

B figure: 1, strengthen gusset 2, brick body 3, the multiple liner plate 4 in surface, member (grab collude or steel bar framework etc.)

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further.

As shown in Figure 1: coal combustion furnace of the present invention is made of dram two portions shown in coal combustion furnace shown in the frame of broken lines A and the frame of broken lines B.The mouth of igniting of dram B is an integrated poured structure by mouthful novel composite refractory brick (3) of igniting, and coal combustion furnace is made of interior air channel, the outer air channel of fire door (4) burner hearth (6) (12) (11) air deflector (10) oil nozzle (13) fuelpipe (14) coal dust air mixed pipe (15).Inwall flame retardant coating NEW TYPE OF COMPOSITE fire door brick

(15) nogging (8) constitutes after NEW TYPE OF COMPOSITE bosh brick (7) NEW TYPE OF COMPOSITE.

NEW TYPE OF COMPOSITE fire door brick is integrated poured as shown in Figure 2.Be characterized in that novel composite refractory brick body and external structure are connected as a single entity, mould material is poured into a mould in the middle of the cavity that is formed by multiple lined steel plate (water conservancy diversion ring) (8) in surface and inwall (3), need not casting mold.Its concrete pouring type is:

1, former fire door level is straightened, on the inwall inboard, divides three layers of welding assembly (7), every layer of uniform distribution several, bilevel member alignment is grabbed and is colluded the direction unanimity, the middle one deck and the half pitch that staggers are up and down grabbed and are colluded direction and two layers of opposite up and down.

2, three layers of member of the same welding in fire door brick water conservancy diversion ring (8) outside, with the interior wall members interlamellar spacing that staggers half, other are same with 1.

3, fire door brick water conservancy diversion ring (8) minor diameter one end and the welding of aliging with diameter shaft external diameter in an end of ring (5), the radially inboard welding of ring (6) outer ring and former fire door inwall minor diameter one end, circle and axially ring the other end cylindrical welding in it, connect together with the vertical welding of several pieces stainless steel plates between fire door brick water conservancy diversion ring major diameter one end and former fire door inwall major diameter one end, form the cast housing;

4, after welding was finished, with the fire door horizontal positioned, fire door brick water conservancy diversion ring major diameter one end was upwards placed;

5, outsourcing mould material finished product is added an amount of water according to usage ratio, artificial or mix evenly with vertical stirrer, to vibrating head mortar can just be proposed till;

The mould material layering that 6, will mix is inserted in the NEW TYPE OF COMPOSITE fire door brick cast housing,, fills up in housing till the floating back of also jolt ramming according to clockwise or counter clockwise direction cycling cycling vibration with vibrating head.Should keep during vibration slowly carrying out, propose to move forward behind the mortar.

7, natural Health preservation carried out heating, drying to NEW TYPE OF COMPOSITE fire door brick and gets final product after 48 hours.

Integrated poured as shown in Figure 3 NEW TYPE OF COMPOSITE integrated poured the method for integrated poured method of mouthful brick and NEW TYPE OF COMPOSITE fire door brick of igniting is identical.

The making method of nogging and NEW TYPE OF COMPOSITE bosh brick is after the piecemeal cast NEW TYPE OF COMPOSITE shown in Figure 4:

1, according to the rear wall inner and outer diameter, but make circle shaping dies in assembly unit cylindrical shaping dies and the integral body (but or assembly unit), and install interior outer mold, outer mold is firmly stable in guaranteeing;

2, set the piecemeal situation according to rear wall inner and outer diameter and NEW TYPE OF COMPOSITE rear wall brick bosh brick, after being processed into the convex ring-type, the stainless steel plate that the surface is served as a contrast again cuts apart, along the reinforcement gusset of every scarfing edge welding certain width, make multiple liner plate (1) of back nogging and bosh brick and strengthen gusset (1);

3, the branch twice are evenly welded several members, grab and inwardly collude the direction unanimity;

4, will weld the multiple liner plate of good back nogging and put into mould, put the piecemeal dividing plate well, guarantee that division plate is stable;

5, all the other pouring procedures are the same.

The present invention also can pour into other different size and dimensions according to the needs of other distinct devices.

Above material requested explanation: 1, low cement deposit material, high aluminium content is not less than 70%, and refractoriness reaches 1790 ℃, and volume density is not less than 2.5g/cm ³2, stainless steel materials and section bar, the 316L stainless steel has good heat-resistant and welding property.

Mounting means: integrated poured novel composite refractory brick can directly be installed with the associated external structure, more convenient, the fire-resistant commentaries on classics of NEW TYPE OF COMPOSITE of piecemeal cast then need be installed by block-by-block in its corresponding external structure, because umber is less, installs also very convenient.

Claims

1. a novel composite refractory brick that is applied to refractory layer of coal combustion furnace is characterized in that adopting and is rich in the high alumina composition, and refractory temperature forms 1390 ℃-1790 ℃ low cement deposit material (or other analogous materials) cast.Can be integrated poured, but also piecemeal cast, fire door brick (5) is integrated poured forming with mouthful brick (3) of igniting, bosh brick (7) forms for the piecemeal cast with back nogging (8).

2. according to the described fire door brick of claim 1 (5) mouthful brick (3) of igniting, not needing when it is integrated poured it is characterized in that casting mold, the inside structure of novel composite refractory brick body and furnace body outer wall is connected as a single entity, and mould material is cast in the middle of the cavity that is formed by multiple liner plate in surface and external structure.

3. according to claim 1, the composite refractory brick of piecemeal cast, it is characterized in that, set the piecemeal situation according to burner hearth inner and outer diameter and NEW TYPE OF COMPOSITE brick, the surface served as a contrast again cut apart after stainless steel plate is processed into the convex ring-type, along the reinforcement gusset of every scarfing edge welding certain width, make the multiple liner plate of back nogging.

4. according to claim 1, multiple liner plate is a stainless steel plate before and after novel composite refractory brick, is welded with the curved reinforcement component (18) at an angle of 90 of different numbers on the steel plate.

5. according to claim 1, novel composite refractory brick also can be used in the various device of flame retardant coating rapid wears such as other coal combustion furnaces, process furnace, cement kiln, boiler, steel-making iron-smelting furnace.