CN203068529U - Fire grate - Google Patents
Fire grate Download PDFInfo
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- CN203068529U CN203068529U CN 201220659650 CN201220659650U CN203068529U CN 203068529 U CN203068529 U CN 203068529U CN 201220659650 CN201220659650 CN 201220659650 CN 201220659650 U CN201220659650 U CN 201220659650U CN 203068529 U CN203068529 U CN 203068529U
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- fire grate
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Abstract
The utility model provides a fire grate which can be simply manufactured with low cost and can exert good anti-corrosion properties. The plurality of fire gates are formed by combination of reciprocating-moving type fire grates and fixed type fire grates and can sequentially convey combusted objects in a combustion furnace. A fire grate main body (12) is composed of castings. The front end portion of the main body (12) on the fire grate along the sequential conveying direction is coated with a front end layer (22) in a casting mode, the front end layer (22) is formed by Ni-Cr alloy, the Ni-Cr alloy comprises, by mass, 40-65% of Ni and remaining parts, and the remaining parts comprise Cr and impurities.
Description
Technical field
The utility model relates to a kind of fire grate for incinerator.
Background technology
Known a kind of incinerator by having a plurality of fire grates that combined by reciprocating motion type fire grate and fixed fire grate, is carried conduct by the rubbish of incinerated matter in stove successively, and it is carried out burning disposal.In this incinerator, promote rubbish by the front end face by the reciprocating motion type fire grate, in stove, carry above-mentioned rubbish successively.
Therefore, the problem that has the easy damage of leading section of fire grate.Particularly in the burning portion of incinerator high temperature, the burning ash that has after the fusing of highly corrosive is attached on the fire grate, in this state, because fire grate is with rubbish with burn ash and push rear section side in the stove, so the leading section of this fire grate is corroded easily.
In order to improve the Corrosion Protection of employed member in the burning situation, put down in writing a kind of fire grate in the patent documentation 1, by the surface heat spraying self-melting alloy to boiler tube, make the superficial layer local melting of the thermal spraying portion with emptying aperture carry out the sealing of hole processing, thus, make the surface of pipe have corrosion-resistant, anti-wear performance.
Put down in writing a kind of fire grate in the patent documentation 2, by for example used the plate of the Ni base alloy-layer of Ni base self-melting alloy in the part casting coating of stoker surface, covered the part on fire grate mother metal surface by Ni base alloy-layer.
Patent documentation 1: Japan Patent open communique spy open flat 9-75832 number
Patent documentation 2: Japan Patent open communique spy open 2007-255814 number, particularly with reference to [0041]～[0043] section
But the technology of record utilizes common thermal spraying to realize surfaction in the patent documentation 1, is the such shortcoming of porous matter in order to eliminate thermally sprayed coating, must for example utilize heating to carry out the sealing of hole processing under the high temperature about 1100 ℃ after thermal spraying.Therefore, not only exist because heating causes member to produce the problem of distortion, also correspondingly consumed the energy.
In the foundry engieering of patent documentation 2 records, under the situation of using Ni base self-melting alloy, produce the phenomenon of casting excess molten when coating sometimes, therefore, alloy is diluted and can not be obtained desired Corrosion Protection.In addition, in [0044] of patent documentation 2 section, provided and to have used the enlightenment of material in addition of Ni base self-melting alloy.But, only be enlightenment, record specifically can not used the material of which kind of component.
In addition, in patent documentation 2, when not forming the metallurgical binding layer fully when the casting alloy of being cast when the alloy-layer fusing of Ni base dilutes or at Ni base alloy with between as the casting alloy of mother metal, use to be used for its sheet material of strengthening, and form Ni base alloy-layer and together cast coating at this sheet material.But, in this case, must adopt special sheet material according to purposes, therefore not only pretty troublesome in process management, and improved manufacturing cost.
The utility model content
In order to address the above problem, the purpose of this utility model is to provide a kind of fire grate, can make simply with low cost, and can bring into play good Corrosion Protection.
In order to address the above problem, fire grate of the present utility model is used for incinerator, it is characterized in that, a plurality of fire grates that utilization is combined by reciprocating motion type fire grate and fixed fire grate, can in incinerator, carry successively by incinerated matter, the main body of described fire grate is made of foundry goods, and is coated with front end layer in the body front end portion casting along described throughput direction successively.Described front end layer is formed by the Ni-Cr alloy, and described Ni-Cr alloy has Ni and the remainder of 40～65 quality %, and described remainder comprises Cr and impurity.
According to fire grate of the present utility model, because front end layer forms by the special Ni-Cr alloy of non-self-melting alloy, so when making the casting coating of above-mentioned fire grate, have the advantage that can not produce the excess molten phenomenon.In addition and since front end layer with the direct state of contact of the main body of fire grate under cast coating, so can be combined securely with main body.Therefore, according to the utility model, can obtain at a low price and have the fire grate on high corrosion-resistant surface.
Description of drawings
Fig. 1 is the skiagraph of the fire grate of the utility model embodiment.
Fig. 2 is the stereogram of same fire grate.
Fig. 3 is the front view of the front end face of same fire grate.
Fig. 4 is the figure of expression casting method.
Fig. 5 is the figure of shape example of the front end layer of expression fire grate.
Fig. 6 is the figure of shape example of the front end layer of expression fire grate.
Fig. 7 is the figure of the internal state of the expression incinerator that uses the utility model fire grate.
Fig. 8 is the figure of the separation hardware of presentation graphs 7.
Fig. 9 is the figure of expression incinerator sidepiece.
Figure 10 is the figure of the brief configuration of the expression incinerator that uses the utility model fire grate.
Description of reference numerals
12 main bodys
22 front end layers
The specific embodiment
Below, as the fire grate of the utility model embodiment, the fire grate that is used for stoker fired grate formula incinerator is described.
At first, the fire grate to stoker fired grate formula incinerator and use thereof describes.As shown in figure 10, stoker fired grate formula incinerator I comprises: hopper H, drop into rubbish W; The F of siege portion sends the rubbish W that drops into from above-mentioned hopper H and makes its burning and become ash; And outlet O, discharge the ash that rubbish W burning forms.The F of siege portion makes outlet O one side low easily rubbish W exported the mode that O one side is sent from hopper H one lateral row, to be inclined to.In the F of siege portion, be formed with: dryer section D, one side makes rubbish W drying from the upstream along the transport direction of rubbish W; Burning zone B makes rubbish W burning in the position than the low one deck of above-mentioned dryer section D; And after-combustion section L, the fixed carbon residual fraction of rubbish W is further burnt.The mode that overlaps with the downstream with upstream side in the F of siege portion has been laid and has been made up the fire grate 11 that reciprocating motion type and fixed a plurality of cast steel systems are arranged.
As depicted in figs. 1 and 2, the upper surface of the main body 12 of fire grate 11 is smooth substantially, and this main body 12 comprises: front portion 13 contacts with the upper surface of downstream fire grate 11a; Rear portion 14 is supported by the F of siege portion shown in Figure 10; And pars intermedia 15, between front portion 13 and rear portion 14.The front portion 13 of main body 12 has smooth front end face 16 and inclined plane 17, and this inclined plane 17 forms the top edge tilted rearward from front end face 16.End face 18 links to each other with inclined plane 17, and the 19th, the side.
Utilize casting to coat on the surface of front end face 16 and be formed with front end layer 22, this front end layer 22 is formed by the Ni-Cr alloy.
Component to the main body 12 of fire grate 11 describes.That is, because main body 12 need have anti-wear performance and high temperature corrosion resistance, so be that 0.7～1.3 quality %, Si are that 1.5～2.5 quality %, Cr are that 25～30 quality %, remainder are that the alloy of Fe and unavoidable impurities element etc. forms by C for example.Under special circumstances, in order to improve cast sturcture, to improve anti-wear performance, comprise the N of 0.2～0.3 quality % sometimes.
In order to improve elevated temperature strength and castability, need comprise the above C of 0.7 above-mentioned quality %, yet, owing under the situation that excessively contains C, can cause corrosion resisting property and toughness to descend, so 1.3 quality % are the upper limit.
From improving the angle of castability and corrosion resisting property, Si is preferably more than 1.5 quality %, and in order to prevent embrittlement, 2.5 quality % are the upper limit.
In order to keep corrosion resisting property and the oxidation resistent susceptibility with in the past hear resistance cast steel peer-level, the containing ratio of Cr is in the scope of 25～30 quality %.
In order to ensure casting character, same with common high Cr cast steel as the unavoidable impurities element, can allow the impurity element in the scope of sneaking into usually.Specifically, Mn is about 0.5～1.2 quality %, Ni is about 0.5～1.0 quality %, P is about 0.024 quality %, S is about 0.008 quality %.
The main body 12 of fire grate 11 need have corrosion resisting property, and its front portion 13, particularly leading section need have stronger corrosion resisting property.The front end layer 22 that setting is formed by the Ni-Cr alloy is in order to bring into play its corrosion resisting property.Specifically, the Ni-Cr alloy that forms front end layer 22 is the alloy of the Cr of the Ni, impurity and the remainder that comprise 40～65 quality %.
As mentioned above, the containing ratio of Ni need be 40～65 quality %.When the containing ratio of Ni less than 40 quality % or when surpassing 65 quality %, be not high temperature more than 1600 ℃ if be used to form the cast temperature of the molten slurry of main body 12, then can not cast coating normally.On the contrary, when the containing ratio of Ni is 40～65 quality %, at 1520 ℃ or slightly under the cast temperature of high level, can cast coating than it normally.In addition, be 40～65 quality % by the containing ratio that makes Ni, desired corrosion resisting property, anti-wear performance can be brought into play well, thereby durability can be guaranteed fully.
As the Ni-Cr alloy materials that forms front end layer 22, by adopting Fe-Ni alloy or Fe-Cr alloy in practicality, in front end layer 22, include impurity.In addition, in experiment, by adopting the electrolysis gold that isozygotys, can access that Ni-Cr(free from foreign meter in fact only forms by Ni-Cr) alloy.Can enumerate C, Si, Mn, P, S, Fe as impurity.The containing ratio of C, Si, Mn is respectively about 0.5 quality %, and P, S are respectively about 0.02 quality %.The situation of Fe of sneaking into more amount inevitably is many, so be to the maximum about 10 quality %.But, if the containing ratio of Fe is too much, then coat condition owing to can limit the casting of front end layer 22, so preferably its containing ratio is 5 quality % to the maximum.
Thickness to front end layer 22 describes below.The Ni-Cr alloy of said components is different with the self-melting alloy of Ni base, because fusing point is higher, so casting has anti-dilution when coating, therefore, having suitable thickness is sufficient and necessary condition.For example under the environment for use in incinerator, be corrosion resisting property and anti-wear performance for fire grate 11 problems, in-problem especially is corrosion resisting property.When main body 12 was made of mentioned component, if the waste between the several years is about 5mm, then fire grate 11 can use without a doubt.But when environment for use was too harsh, the waste between the several years might arrive 6～8mm.Therefore, forming front end layer 22 is effectively, and this front end layer 22 forms by being used for etch-proof Ni-Cr alloy.
The waste of front end layer 22 is more small basically.Therefore, front end layer 22 does not need to have very big thickness.But if consider manufacturing easily, service condition etc., then thickness is preferably 1～4mm.
In the front portion 13 of the main body 12 of fire grate 11, need utilize front end layer 22 to realize the etch-proof harsh especially central portion of condition when being the use of front end face 16.That is, in the front end face 16 of main body 12, needing especially to realize etch-proof is its central portion, and its marginal end portion also realizes that by front end layer 22 etch-proof necessity is lower.Therefore, as Fig. 1～shown in Figure 3, the profile of front end layer 22 can be formed littler than the profile of the front end face 16 of main body 12.Specifically, be rectangle usually front end face 16 picture illustrates, as common example, its longitudinal size is about 100～120mm, lateral dimension is about 100～200mm.In this case, the gap between the profile of the profile of the front end face 16 of main body 12 and front end layer 22 can be at 5mm to about the 10mm.In addition, also can make the profile of front end layer 22 identical with the profile of the front end face 16 of main body.In addition, not only the front end face 16 in main body 12 forms front end layer 22, also can form front end layer 22 on the inclined plane 17 of main body 12 as required.In addition, insufficient when the casting of inside is coated with when coating owing to the imagination casting, so for safety, can carry out welding processing to casting coating boundary portion.
Fig. 4 illustration be used for the casting mould of casting fire grate 11.The 26th, mold, the 27th, bed die, above-mentioned mould is formed by sand mo(u)ld.The 28th, cut-off rule.In addition, the 29th, molten slurry mouth, the 30th, for the space of the molten slurry of extruding.As shown in the figure, the raw material 21 that are used to form front end layer 22 are arranged in the bed die 27.
By injecting molten slurry in this state in the casting mould, thereby can cast Fig. 1, main body 12 shown in Figure 2, and coat the raw material 21 that the Ni-Cr alloy forms by casting, can form front end layer 22.As shown in Figure 4, as required, can suitably use chill 31.
In the illustrated embodiment, thus front end layer 22 is secured on the surface of front end face 16 of main body 12 integrated.Perhaps also can replace in this, front end layer 22 enters the inside of main body 12 along its thickness direction, only its surface or only the surface and near expose from main body 12.That is, can make front end layer 22 enter the inside of main body 12.In the utility model, described structure all is defined as " casting coats " structure.
When except the front end face 16 in main body 12, also 17 when forming front end layers 22, can adopt same manufacture method on the inclined plane.In this case, for example can prepare the raw material of " へ " shape corresponding with the shape on front end face 16 and inclined plane 17, and its casting is coated.
By the casting product are carried out necessary machining, can obtain product.The said goods is arranged in the incinerator.
Fig. 5, Fig. 6 represent the shape example of raw material 21.Illustrated raw material 21 all are that the plate-like piece by rectangle constitutes.And in the raw material 21 of Fig. 5, be formed with groove 41 in length and breadth on the surface with molten slurry contacts a side of plate-like piece.In the raw material 21 of Fig. 6, be spaced from each other the interval and be formed with a plurality of long projections 42 along plate-like piece one edge direction.When casting coats, compare with the plate of flat shape, have groove 41 or projection 42 can make between the foundry goods of raw material 21 that the Ni-Cr alloy forms and main body 12 be connected more firm.
The hardware that is used for incinerator also has various members except fire grate.Above-mentioned hardware coats the laminate that is formed by the Ni-Cr alloy by casting similarly, can form same corrosion-resistant coating.
Fig. 7 represents from the situation of outlet O unilateral observation incinerator inside shown in Figure 10.As shown in the figure, though be provided with a plurality of fire grates 11, along as by the throughput direction of the rubbish of incinerated matter, be equipped with a plurality of separation hardwares 34 at its suitable position.As shown in Figure 8, above-mentioned separation hardware 34 is formed with the same superficial layer 35 that is formed by the Ni-Cr alloy also on the part of the upper top that requires the surface corrosion resistance performance.That is, coat the sheet material of the Ni-Cr alloy system of the upper surface shape with diagram end face by casting, and the machining of after this stipulating, can be used as hardware 34.Because the superficial layer 35 that the Ni-Cr alloy forms has corrosion resisting property, so can use for a long time.
Fig. 9 represents the sidepiece of incinerator inside, and hardware 36 also can form the superficial layer 37 of same Ni-Cr alloy system as used herein.
[embodiment]
[embodiment 1]
Adopt Ni be 60 quality %, C be 0.4 quality %, Fe be 4.0 quality % and comprise other impurity, remainder is Cr and the Ni-Cr alloy sheets that is of a size of 85mm * 95mm * thickness 4mm.By machining, be formed with the groove suitable with Fig. 5 in above-mentioned alloy sheets, this groove is that width 1mm * degree of depth 1mm and bottom land bend to circular-arc.
The Ni-Cr alloy sheets of the trough of belt that obtains in the above described manner is assembled in the sand mo(u)ld, thereby forms casting mould.Above-mentioned casting mould adopts at a molten slurry mouth two casting moulds is set.That is, as so-called mould two-chamber casting, constitute the casting mould of present embodiment 1 and the casting mould of embodiment described later 2 by a casting mould.
As the molten slurry that is used for casting fire grate main body, adopting Cr is that 27.8 quality %, C are that 0.82 quality %, Si are that 2.3 quality %, Mn are that 0.66 quality %, P are that 0.025 quality %, S are that 0.009 quality %, remainder are the raw material of Fe.And, adopt the high frequency smelting furnace to make molten slurry with 1620 ℃ of outflows and with 1560 ℃ of injections, and casting coats the Ni-Cr alloy sheets.By machining, the leading section shape of the casting product that obtain is adjusted, thereby made the product of fire grate.
The front end face of the fire grate main body of the said goods is of a size of 103mm * 110mm.That is, the gap between the edge part of the edge part of the front end face profile of fire grate main body and the front end layer profile that formed by the Ni-Cr alloy is about 8mm.
[embodiment 2]
The Ni-Cr alloy sheets of the 85mm * 95mm * thickness 4mm of employing and embodiment 1 same size.By machining, form the projection of the cross section rectangle of the width 2mm * height 1.5mm suitable with Fig. 6 in above-mentioned alloy sheets.
Adopt above-mentioned alloy sheets, cast similarly to Example 1, and carry out the product that machining obtains fire grate.
[comparative example]
Compare with embodiment 1, do not cast the clad alloy plate and only utilize molten slurry to make foundry goods.And, carry out the product that machining obtains fire grate.
[observation]
The fire grate of embodiment and the fire grate of comparative example are assembled in the incinerator of actual use.Observe when having passed through 2 years the service time in physical device, and in the fire grate of embodiment, the front end layer that is formed by the Ni-Cr alloy keeps original state constant, and therefore, fire grate has enough corrosion resisting properties.
With respect to this, the surface of the fire grate front end of comparative example is recessed with the depth capacity 0.7mm left and right sides, can clearly be seen that constantly to be corroded.
Claims (2)
1. a fire grate is used for incinerator, it is characterized in that,
A plurality of fire grates that utilization is combined by reciprocating motion type fire grate and fixed fire grate can be carried by incinerated matter in incinerator successively,
The main body of described fire grate is made of foundry goods, and is coated with front end layer in the body front end portion casting along described throughput direction successively.
2. fire grate according to claim 1 is characterized in that, the thickness of described front end layer is 1～4mm, and the size of front end layer profile and the measure-alike of body front end facial contour or littler than the size of body front end facial contour.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012006399U JP3180720U (en) | 2012-10-22 | 2012-10-22 | Grate |
| JP2012-006399 | 2012-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203068529U true CN203068529U (en) | 2013-07-17 |
Family
ID=48767308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220659650 Expired - Lifetime CN203068529U (en) | 2012-10-22 | 2012-12-04 | Fire grate |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3180720U (en) |
| CN (1) | CN203068529U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325291A (en) * | 2020-10-29 | 2021-02-05 | 广东博盈特焊技术股份有限公司 | Incinerator fire grate segment and protection method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6482404B2 (en) * | 2015-06-23 | 2019-03-13 | 日立造船株式会社 | Grate and manufacturing method thereof |
| WO2024043187A1 (en) * | 2022-08-26 | 2024-02-29 | 荏原環境プラント株式会社 | Hearth component, hearth component production method |
-
2012
- 2012-10-22 JP JP2012006399U patent/JP3180720U/en not_active Expired - Lifetime
- 2012-12-04 CN CN 201220659650 patent/CN203068529U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325291A (en) * | 2020-10-29 | 2021-02-05 | 广东博盈特焊技术股份有限公司 | Incinerator fire grate segment and protection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3180720U (en) | 2013-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |