CN112539647A - Air inlet device and air inlet method of high-temperature push plate furnace - Google Patents
Air inlet device and air inlet method of high-temperature push plate furnace Download PDFInfo
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- CN112539647A CN112539647A CN202011204265.5A CN202011204265A CN112539647A CN 112539647 A CN112539647 A CN 112539647A CN 202011204265 A CN202011204265 A CN 202011204265A CN 112539647 A CN112539647 A CN 112539647A
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- air inlet
- temperature
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- furnace
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
- F27B9/045—Furnaces with controlled atmosphere
- F27B9/047—Furnaces with controlled atmosphere the atmosphere consisting of protective gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
- F27B2009/3027—Use of registers, partitions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
- F27D2007/023—Conduits
Abstract
The invention relates to a high-temperature push plate furnace, in particular to an air inlet device of the high-temperature push plate furnace, which comprises: the porous wall brick is provided with a plurality of air inlets which are arranged in a staggered manner, and the porous wall brick is arranged on two sides of a hearth of the high-temperature push plate furnace; the air inlet bin is arranged between the porous wall brick and the heat insulation layer of the high-temperature push plate furnace; and one end of the air inlet channel is communicated with the air inlet bin, and the other end of the air inlet channel is connected with a protective gas pipe of the high-temperature push plate furnace. The air inlet device of the high-temperature push plate furnace provided by the invention is simple in structure, and the problems of non-uniform protective gas and unstable sintering quality are effectively solved by adopting the staggered arrangement of the air inlets and heating the protective gas.
Description
Technical Field
The invention relates to a high-temperature push plate furnace, in particular to an air inlet device and an air inlet method of the high-temperature push plate furnace.
Background
When the existing high-temperature push plate furnace is used for multi-layer sintering, the problems that the number of product placing layers is higher and the atmosphere in the furnace is not uniform exist; meanwhile, the sintering quality of the product is unstable.
Disclosure of Invention
In order to solve the problems, the invention provides a high-temperature push plate furnace gas inlet device which can effectively ensure the uniformity of protective gas, ensures the stable sintering quality and has high qualification rate, and the specific technical scheme is as follows:
high temperature push plate furnace air inlet unit includes: the porous wall brick is provided with a plurality of air inlets which are arranged in a staggered manner, and the porous wall brick is arranged on two sides of a hearth of the high-temperature push plate furnace; the air inlet bin is arranged between the porous wall brick and the heat insulation layer of the high-temperature push plate furnace; and one end of the air inlet channel is communicated with the air inlet bin, and the other end of the air inlet channel is connected with a protective gas pipe of the high-temperature push plate furnace.
By adopting the technical scheme, the number of the air inlets on the refractory bricks on two sides of the hearth in the prior art is one, and when the multilayer sintering is carried out, the entering protective gas is slowly diffused due to the small space in the hearth, so that the distribution of the protective gas is uneven, and the sintering quality is influenced. A plurality of crisscross inlet ports that set up realize that protective gas gets into from a plurality of positions of furnace side, very big improvement protective gas's homogeneity. The impact of a plurality of inlet ports on the internal temperature of the hearth when air can be dispersed and admitted, if one inlet port is adopted, the air inflow of the inlet port is large when air is admitted, the temperature around the inlet port is low in the hearth due to the fact that gas is concentrated and the air inflow is large, the temperature of the protective gas is required to be uniformly mixed for a long time, and the temperature fluctuation inside the hearth is large. When a plurality of air inlets are adopted, the air inflow of each air inlet is small and is dispersed at each position of the hearth, the protective gas can be rapidly blended into the high-temperature gas in the hearth and is rapidly heated, the caused temperature fluctuation is small, and meanwhile, the uniformity of the protective gas is improved.
The storehouse of admitting air sets up the one side at porous wall brick, be close with furnace, consequently, the inside temperature in storehouse of admitting air is very high, it is heated rapidly to enter into the storehouse of admitting air when protective gas, the temperature that gets into the inside protective gas of furnace is high, can reach more than 200 ℃, reach more than 500 ℃ even, very big reduction with the inside difference in temperature of furnace, reduce the impact to the inside temperature of furnace, thereby the violent fluctuation of the inside temperature of furnace has been avoided, the fluctuation degree of the inside temperature of furnace has been reduced, make the inside temperature of furnace keep being close invariable state, thereby reduce the influence that the temperature variation produced the sintering, sintering quality has been guaranteed.
The inlet channel sets up in the heat preservation, and the temperature of heat preservation is also higher, therefore the inlet channel can carry out primary heating to protective gas, and protective gas after primary heating is heated once more after entering into the storehouse of admitting air, very big dwindle with the inside difference in temperature of furnace.
According to the invention, by increasing the temperature of the protective gas entering the hearth, the fluctuation degree of the temperature in the hearth is reduced, the sintering quality of the product is effectively improved, and the problem of unstable sintering quality is solved. Because the protective gas flows out from the high-pressure gas cylinder, the temperature is lower, the temperature fluctuation is caused when the low-temperature gas enters the hearth, the temperature fluctuation is larger when the air inflow is larger, and even the temperature inside the hearth is lower than the set sintering temperature, so the sintering quality is influenced. The invention discloses a method for improving the sintering quality of a sintering product, which comprises the steps of enabling a furnace hearth to be heated, enabling the furnace hearth to be heated, and enabling the furnace hearth to be heated.
The air inlet bin and the air inlet channel are heated by adopting high temperature of the furnace body, rather than adopting an independent heating source, so that the utilization rate of waste heat is improved.
Furthermore, the air inlets are not less than two rows, each row of air inlets is not less than two, and the two adjacent rows of air inlets are arranged in a staggered mode.
Furthermore, the air inlet holes in each row are arranged at equal intervals along the vertical direction.
Further, the air inlet bin comprises four light refractory bricks, and the light refractory seats enclose the rectangular air inlet bin.
Through adopting above-mentioned technical scheme, the storehouse simple structure admits air.
Further, the air inlet channel is arranged along the side surface and the bottom of the high-temperature push plate furnace.
Through adopting above-mentioned technical scheme, inlet channel sets up and to preheat protective gas fully in side and bottom.
Furthermore, the device also comprises a bottom air inlet pipe, wherein the bottom air inlet pipe is arranged at the bottom of the high-temperature push plate furnace and is communicated with the air inlet channel.
By adopting the scheme, the bottom air inlet pipe is conveniently connected with the air supply pipe, and the air supply pipe is connected with the steel cylinder of the protective gas.
Furthermore, a plurality of bottom air inlet pipes are arranged, the porous wall bricks correspond to the air inlet bins one by one, and the porous wall bricks which are oppositely arranged are communicated with the same bottom air inlet pipe through an air inlet channel; still include the valve, the valve is equipped with a plurality ofly, the valve is installed respectively on the bottom intake pipe.
By adopting the technical scheme, the air inflow of the protective gas is controlled by controlling the opening size of the valve, and the uniformity of the protective gas is further controlled.
The gas inlet method of the high-temperature push plate furnace is characterized in that protective gas is preheated in a gas inlet bin and then is added into a hearth through a plurality of gas inlet holes in a porous wall brick.
Furthermore, a plurality of air inlets are arranged in a staggered manner.
Further, the air inflow of each bottom air inlet pipe is controlled respectively.
Compared with the prior art, the invention has the following beneficial effects:
the air inlet device of the high-temperature push plate furnace provided by the invention is simple in structure, and the problems of non-uniform protective gas and unstable sintering quality are effectively solved by adopting the staggered arrangement of the air inlets and heating the protective gas.
Drawings
FIG. 1 is a partial cross-sectional view of a high temperature pusher furnace air induction unit;
fig. 2 is a sectional view taken along line a-a of fig. 1.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Example one
As shown in fig. 1 and 2, the air inlet device of the high-temperature push plate furnace comprises: the multi-hole wall brick 2 is provided with a plurality of air inlet holes 21, the air inlet holes 21 are arranged in a staggered manner, and the multi-hole wall brick 2 is arranged on two sides of a hearth 11 of the high-temperature push plate furnace 1; the air inlet bin 3 is arranged between the porous wall brick 2 and the heat insulation layer of the high-temperature push plate furnace 1; and one end of the air inlet channel 4 is communicated with the air inlet bin 3, and the other end of the air inlet channel 4 is connected with a protective gas pipe of the high-temperature push plate furnace 1.
In the prior art, one air inlet 21 is formed in each of the refractory bricks on two sides of the hearth 11, and when multiple layers of sintering are performed, the entering protective gas is slowly diffused due to the small space in the furnace, so that the distribution of the protective gas is uneven, and the sintering quality is affected. A plurality of crisscross inlet holes 21 that set up realize that protective gas gets into from a plurality of positions of 11 sides of furnace, very big improvement protective gas's homogeneity. The impact on the internal temperature of the hearth 11 when the air can be dispersed and admitted by the plurality of air inlets 21, if one air inlet 21 is adopted, the air inflow is large when the air inlets 21 admit air, the temperature around the air inlets 21 in the hearth 11 is low due to gas concentration and large air inflow, the protective gas is uniformly mixed for a long time, the temperature of the protective gas is increased, and the temperature fluctuation inside the hearth 11 is large. When a plurality of air inlet holes 21 are adopted, the air inflow of each air inlet hole 21 is small and is dispersed at each position of the hearth 11, the protective gas can be rapidly fused into the high-temperature gas in the hearth 11 and is rapidly heated, the caused temperature fluctuation is small, and meanwhile, the uniformity of the protective gas is improved.
The storehouse 3 that admits air sets up the one side at porous wall brick 2, be close with furnace 11, consequently the inside temperature in storehouse 3 that admits air is very high, it is heated rapidly to enter into storehouse 3 when protective gas, the temperature that gets into the inside protective gas of furnace 11 is high, can reach more than 200 ℃, reach more than 500 ℃ even, very big reduction with the inside difference in temperature of furnace 11, reduce the impact to the inside temperature of furnace 11, thereby the violent fluctuation of the inside temperature of furnace 11 has been avoided, the fluctuation degree of the inside temperature of furnace 11 has been reduced, make the inside temperature of furnace 11 keep being close invariable state, thereby reduce the influence that the temperature variation produced the sintering, sintering quality has been guaranteed.
According to the invention, by increasing the temperature of the protective gas entering the hearth 11, the fluctuation degree of the temperature inside the hearth 11 is reduced, the sintering quality of the product is effectively improved, and the problem of unstable sintering quality is solved. Because the protective gas flows out from the high-pressure gas cylinder, the temperature is low, the temperature fluctuation is caused when the low-temperature gas enters the hearth 11, the temperature fluctuation is larger when the air inflow is larger, and even the temperature inside the hearth 11 is lower than the set sintering temperature, so the sintering quality is influenced. The prior art does not find that the temperature fluctuation of the hearth 11 caused by the low temperature of the protective gas is considered as the problem of the temperature uniformity and the gas pressure inside the hearth 11, and always finds solutions in the directions.
The air inlet bin 3 and the air inlet channel 4 are heated without adopting an independent heating source, but are heated by adopting the high temperature of the furnace body, so that the utilization rate of the waste heat is improved.
The inlet temperature of the protective gas is generally up and down outdoors, and the temperature in the hearth 11 is as high as 700-1800 ℃ during sintering, so that the temperature difference is large, technicians can default that the protective gas can be rapidly changed into high-temperature gas, and the temperature in the hearth 11 cannot be influenced.
The air inlet device of the high-temperature push plate furnace 1 provided by the invention is simple in structure, and the problems of non-uniform protective gas and unstable sintering quality are effectively solved by adopting the staggered arrangement of the air inlets and heating the protective gas.
In not less than one embodiment, the air inlet bin 3 comprises four light refractory bricks, and the light refractory seat encloses the rectangular air inlet bin 3. The air inlet bin 3 has a simple structure.
Example two
On the basis of the above embodiment, the air inlets 21 are not less than two rows, and each row of air inlets 21 is not less than two, and the air inlets 21 in two adjacent rows are staggered.
The air intake holes 21 of each row are arranged at equal intervals in the vertical direction. The air inlet holes 21 are arranged at equal intervals to facilitate processing and ensure the uniformity of protective gas when in air inlet.
EXAMPLE III
On the basis of any of the above embodiments, the gas inlet channel 4 is arranged along the side and bottom of the high-temperature pusher furnace 1. The provision of the gas inlet passage 4 at the side and bottom enables sufficient preheating of the shielding gas.
Example four
On the basis of any one of the above embodiments, the device further comprises a bottom air inlet pipe 5, and the bottom air inlet pipe 5 is arranged at the bottom of the high-temperature push plate furnace 1 and is communicated with the air inlet channel 4.
The bottom intake pipe 5 is conveniently connected with an air supply pipe, and the air supply pipe is connected with a steel cylinder of protective gas. One end of the bottom air inlet pipe 5 is communicated with the air inlet channel 4, and the other end is communicated with the protective gas pipe.
EXAMPLE five
On the basis of the fourth embodiment, a plurality of bottom air inlet pipes 5 are arranged, the porous wall bricks 2 correspond to the air inlet bins 3 one by one, and the porous wall bricks 2 which are arranged oppositely are communicated with the same bottom air inlet pipe 5 through the air inlet channel 4; still include the valve, the valve is equipped with a plurality ofly, and the valve is installed respectively on bottom intake pipe 5. The air inflow of the protective gas is controlled by controlling the opening size of the valve, and the uniformity of the protective gas is further controlled. The valve is a gate valve or a needle valve.
EXAMPLE six
The gas inlet method of the high-temperature push plate furnace is characterized in that protective gas is preheated in the gas inlet bin 3 and then is added into the hearth 11 through a plurality of gas inlet holes 21 on the porous wall brick 2. The plurality of air intake holes 21 are arranged alternately. The intake air amount of each bottom intake pipe 5 is controlled separately.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (10)
1. High temperature push plate furnace air inlet unit, its characterized in that includes:
the porous wall brick is provided with a plurality of air inlets which are arranged in a staggered manner, and the porous wall brick is arranged on two sides of a hearth of the high-temperature push plate furnace;
the air inlet bin is arranged between the porous wall brick and the heat insulation layer of the high-temperature push plate furnace;
and one end of the air inlet channel is communicated with the air inlet bin, and the other end of the air inlet channel is connected with a protective gas pipe of the high-temperature push plate furnace.
2. A high-temperature pusher furnace air intake apparatus according to claim 1,
the air inlet is no less than two rows, each row of air inlet is no less than two, and the two adjacent rows of air inlets are arranged in a staggered mode.
3. A high-temperature pusher furnace air intake apparatus according to claim 2,
the air inlet holes in each row are arranged at equal intervals along the vertical direction.
4. A high-temperature pusher furnace air intake apparatus according to claim 1,
the air inlet bin comprises four light refractory bricks, and the light refractory seats enclose the rectangular air inlet bin.
5. A high-temperature pusher furnace air intake apparatus according to claim 1,
the air inlet channel is arranged along the side surface and the bottom of the high-temperature push plate furnace.
6. A high-temperature pusher furnace air intake apparatus according to claim 1,
the bottom air inlet pipe is arranged at the bottom of the high-temperature push plate furnace and communicated with the air inlet channel.
7. A high-temperature pusher furnace air intake apparatus according to claim 1,
the bottom air inlet pipe is provided with a plurality of porous wall bricks, the porous wall bricks correspond to the air inlet bin one by one, and the porous wall bricks which are arranged oppositely are communicated with the same bottom air inlet pipe through an air inlet channel;
still include the valve, the valve is equipped with a plurality ofly, the valve is installed respectively on the bottom intake pipe.
8. The air inlet method of the high-temperature push plate furnace is characterized in that,
and (4) preheating the protective gas in the gas inlet bin, and then adding the protective gas into the hearth through a plurality of gas inlet holes in the porous wall brick.
9. A high-temperature push plate furnace air inlet method according to claim 8,
the plurality of air inlets are arranged in a staggered manner.
10. A high-temperature push plate furnace air inlet method according to claim 8,
and respectively controlling the air inflow of each bottom air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204265.5A CN112539647A (en) | 2020-11-02 | 2020-11-02 | Air inlet device and air inlet method of high-temperature push plate furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204265.5A CN112539647A (en) | 2020-11-02 | 2020-11-02 | Air inlet device and air inlet method of high-temperature push plate furnace |
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| CN112539647A true CN112539647A (en) | 2021-03-23 |
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| CN202011204265.5A Pending CN112539647A (en) | 2020-11-02 | 2020-11-02 | Air inlet device and air inlet method of high-temperature push plate furnace |
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Citations (9)
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|---|---|---|---|---|
| CN201867042U (en) * | 2010-10-12 | 2011-06-15 | 中国石油化工股份有限公司 | Push plate kiln |
| CN105444566A (en) * | 2015-12-04 | 2016-03-30 | 中国电子科技集团公司第四十八研究所 | Furnace body of atmosphere protection three-pushed-slab kiln |
| CN205300270U (en) * | 2015-12-27 | 2016-06-08 | 合肥恒力电子装备公司 | Atmosphere roller hearth furnace bottom heating piecemeal inlet structure |
| CN205980750U (en) * | 2016-07-20 | 2017-02-22 | 中国电子科技集团公司第四十八研究所 | Four pushing plate furnace's of atmosphere protection furnace body |
| CN108020082A (en) * | 2017-11-15 | 2018-05-11 | 中国电子科技集团公司第四十八研究所 | A kind of furnace structure of agglomerating plant |
| CN209246660U (en) * | 2018-10-10 | 2019-08-13 | 南京金銮窑炉设备有限公司 | The push plate kiln plate and pushed bat kiln for having atmosphere protection function |
| CN209926846U (en) * | 2019-04-09 | 2020-01-10 | 苏州云栖谷智能系统装备有限公司 | Roller kiln with atmosphere stabilizing function |
| CN110822894A (en) * | 2018-08-08 | 2020-02-21 | 中国电子科技集团公司第四十八研究所 | Roller way sintering furnace with uniform hearth temperature |
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2020
- 2020-11-02 CN CN202011204265.5A patent/CN112539647A/en active Pending
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| CN201867042U (en) * | 2010-10-12 | 2011-06-15 | 中国石油化工股份有限公司 | Push plate kiln |
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| CN205300270U (en) * | 2015-12-27 | 2016-06-08 | 合肥恒力电子装备公司 | Atmosphere roller hearth furnace bottom heating piecemeal inlet structure |
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