CN215049886U - Primary air inlet for heat recovery coke oven - Google Patents
Primary air inlet for heat recovery coke oven Download PDFInfo
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- CN215049886U CN215049886U CN202121201470.6U CN202121201470U CN215049886U CN 215049886 U CN215049886 U CN 215049886U CN 202121201470 U CN202121201470 U CN 202121201470U CN 215049886 U CN215049886 U CN 215049886U
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- air inlet
- coke oven
- air
- heat recovery
- inlet pipe
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Abstract
The utility model belongs to the technical field of a metallurgical industry heat recovery coke oven, in particular to primary air intake for heat recovery coke oven, including air-supply line and air control valve, wherein the air-supply line sets up on furnace gate or upper portion protection shield, and the one end and the heat recovery coke oven carbonization chamber of air-supply line are linked together, and the other end is connected with air control valve, and the air inlet direction and the heat recovery coke oven carbonization chamber of the primary air intake of coke oven parallel. The utility model has the advantages that: the vertical air inlet at the top of the coke oven is changed into the horizontal air inlet at the oven door or the protective plate, and the change of the position of the horizontal air inlet controls the air flow to directly contact coke cakes, so that the burning loss rate of the coke cakes is greatly reduced; the primary air inlet can be directly operated on the coke oven operating platform after the position is changed, so that potential safety hazards are avoided; the combustion condition of flame in the coke oven can be directly observed through the primary air inlet of the coke oven, the air regulating valve at the end part of the air inlet pipe is regulated, the air inflow is changed, and the combustion proportion of air and coal gas in the carbonization chamber is effectively controlled.
Description
Technical Field
The utility model belongs to the technical field of a metallurgical industry heat recovery coke oven, in particular to a primary air inlet for a heat recovery coke oven.
Background
The heat recovery coke oven is different from the traditional coke oven, raw coke gas generated in the carbonization process of coal is matched with air introduced by the three primary air inlets on the coke oven side and the three primary air inlets on the coke oven side to be directly combusted at the top of a carbonization chamber, a coal cake is heated in a heat radiation mode, and mixed gas is transferred to a furnace bottom flame path through a descending flame path and is combusted with the air provided by the secondary air inlets to continuously provide heat for the coal cake. The high-temperature waste gas after complete combustion is led out through a flue, and the recovered waste heat is used for generating steam and generating power.
In the coking process of the heat recovery coke oven, the coking chamber is in a negative pressure state, so that the raw coke oven gas cannot be leaked. The raw gas is completely combusted in the furnace, and ammonia water is not required to be sprayed, so that coking wastewater is not generated, and the pursuit of the current production enterprises on green, environment-friendly and clean production can be greatly met.
In the conventional heat recovery coke oven, a primary air inlet is arranged on the top of the coke oven and above a carbonization chamber, and is a ventilation duct formed by enclosing refractory bricks, and generally no adjusting device is arranged. The coal gas generation amount of different coking times is changed greatly, and the suction force generated by the negative pressure in the furnace to the external air is unstable, so that various problems caused by the unbalance of the air and coal gas ratio often occur. Air introduced from a primary air inlet at the top of the furnace vertically enters the carbonization chamber, quickly impacts the surface of the coal cake to generate violent combustion, causes large-area burning loss of coke and reduces the yield. Meanwhile, air cannot be effectively diffused, the air and raw coke oven gas are not sufficiently combusted, and sufficient heat cannot be provided to heat the coal cakes, so that the coking time is prolonged. And the furnace top temperature is higher, and the operating environment is poorer.
Disclosure of Invention
The utility model aims at providing a primary air inlet for a heat recovery coke oven, which is arranged on an oven door or an upper protection plate and can be directly operated on a coke oven operation table. The flame combustion condition in the furnace can be directly observed through the primary air inlet, the end part of the air inlet is provided with the air regulating valve with the disc, and the opening and closing angle of the disc is adjusted by rotating the shaft handle of the air regulating valve, so that the air inflow is changed, and the combustion ratio of air and coal gas in the carbonization chamber is effectively adjusted.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
a primary air inlet for a heat recovery coke oven comprises a coke oven air inlet pipe and an air regulating valve, and is characterized in that: the air inlet pipe is arranged on the furnace door or the upper protection plate, one end of the air inlet pipe is communicated with the heat recovery coke oven carbonization chamber, the other end of the air inlet pipe is provided with an air regulating valve, and the air inlet direction of the primary air inlet of the coke oven is parallel to the heat recovery coke oven carbonization chamber.
As a further description of the above solution, the air adjustment valve includes a shaft, a shaft sleeve, a disc and a lock nut; the shaft sleeve is positioned in the air inlet pipe; one end of the shaft handle penetrates into the shaft sleeve, the other end of the shaft handle extends out of the air inlet pipe, the shaft handle is fixedly connected with the shaft sleeve through a connecting piece, the butterfly nut is in threaded connection with the top of the shaft sleeve, and the disc is fixed on the shaft sleeve.
As further described in the above solution, a baffle ring is further disposed on the inner wall of the air intake pipe.
As a further description of the above solution, the shaft is configured to rotate the disk in the air inlet pipe.
As a further description of the above solution, when the disk plate is perpendicular to the axial direction of the air inlet pipe, the air inlet is closed.
As a further description of the above solution, the air inlet pipe is connected to the coke oven door or the protective panel by means of a flange.
As a further description of the scheme, the aperture of the air inlet pipe is 120mm-200 mm.
Utility model's beneficial effect:
1. the utility model discloses heat recovery is air intake for coke oven, it is seted up on furnace gate or upper portion protection shield, can directly operate on the coke oven operation panel, and the potential safety hazard has also been avoided simultaneously in the operation of being more convenient for.
2. The flame burning condition in the furnace can be directly observed through the primary air inlet, the end part of the primary air inlet is provided with the air regulating valve with the disc plate, and the shaft handle of the air regulating valve is rotated to regulate the opening and closing angle of the disc plate, so that the air inflow is changed, and the burning proportion of air and coal gas in the carbonization chamber is effectively regulated.
3. The inventor researches and discovers that air enters a carbonization chamber in parallel through a primary air inlet on a furnace door or an upper protection plate, the formed air flow is stable, the air flow is fully mixed with raw coke oven gas, the combustion speed is stable, the temperature distribution in the furnace is uniform, the coking time is shortened, and the production capacity is improved by at least 0.5%.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1
Fig. 4 is a thermal simulation diagram according to an embodiment of the present invention.
In the figure: 1-an air inlet pipe; 11-a baffle ring; 2-air regulating valve; 21-a mandrel; 22-shaft sleeve; 23-disc 23; 24-a wing nut; 3-oven door or upper protective plate; 4-flange.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
The inventor finds that: the primary air inlet of the existing coke oven is generally not provided with an adjusting device, and the ratio of air to coal gas is unbalanced; air vertically enters a carbonization chamber and directly impacts the surface of a coal cake to generate violent combustion, so that large-area burning loss of coke is caused, and the yield is reduced; the air can not form effective diffusion, so that the air can not be fully combusted with the raw coke oven gas, and can not provide enough heat to heat the coal cake, thereby prolonging the coking time; the furnace top temperature is higher, and the operation environment is poorer.
Referring to fig. 1-3, which are schematic structural views of an embodiment of a primary air inlet for a heat recovery coke oven of the present invention, including a coke oven air inlet pipe 1 and an air regulating valve 2, the air inlet pipe 1 is disposed on an oven door or an upper protection plate 3 of the heat recovery coke oven, one end of the air inlet pipe 1 is communicated with a carbonization chamber of the heat recovery coke oven, the other end is connected with the air regulating valve 2, and the air inlet direction of the primary air inlet of the coke oven is parallel to the carbonization chamber of the heat recovery coke oven. The air inlet pipe 1 of the primary air inlet of the coke oven is arranged on the oven door or the upper protective plate 3 of the heat recovery coke oven, can be directly operated on an operating platform of the coke oven, and simultaneously avoids potential safety hazards; the combustion condition of flame in the furnace can be directly observed through the air inlet pipe 1, the end part of the air inlet pipe is provided with an air regulating valve with a disc plate 23, and the opening and closing angle of the disc plate is adjusted by rotating a shaft handle 21 of the air regulating valve, so that the air inflow is changed, and the combustion proportion of air and coal gas in a carbonization chamber is effectively adjusted; the inventor discovers through the research that the air passes through the parallel entering carbonization chamber of the primary air intake on furnace gate or protection shield upper portion, and the air current of formation is stable (see fig. 4 the utility model discloses a thermal engineering simulated diagram), mixes fully with the raw coke oven gas, and combustion speed is steady, and the interior temperature distribution of stove is even, shortens the coking time, and productivity gain improves 0.5% at least. See fig. 4 for a thermal simulation.
The air regulating valve 2 comprises a shaft handle 21, a shaft sleeve 22, a disc 23 and a butterfly nut 24, wherein the shaft sleeve 22 is positioned in the air inlet pipe 1; one end of the shaft handle 21 penetrates into the shaft sleeve 22, the other end of the shaft handle extends out of the air inlet pipe 1, the shaft handle 21 is fixedly connected with the shaft sleeve 22 through a connecting piece, the butterfly nut 24 is in threaded connection with the top of the shaft sleeve 22, and the disc 23 is fixed on the shaft sleeve 22. The structure can be used for screwing out a part of the butterfly nut 24 when the air inflow needs to be adjusted, the shaft handle 21 drives the disc 23 and the shaft sleeve 22 to rotate, and the butterfly nut 24 is locked by rotating after the required angle is adjusted, so that the disc 23 is prevented from rotating under the influence of wind power.
In order to ensure the sealing performance of the disc 23, a baffle ring 11 is further arranged on the inner wall of the air inlet pipe 1. Wherein the shaft handle 21 is configured to drive the disc 23 to rotate in the air inlet pipe 1; when the disc plate 23 is vertical to the axial direction of the air inlet pipe 1, the air inlet pipe 1 is closed. For easy replacement and maintenance, the air inlet pipe 1 is connected to the furnace door or upper protective plate 3 via a flange 4. Wherein the aperture of the air inlet pipe 1 is 100mm-200 mm.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a heat recovery is primary air intake for coke oven, includes air-supply line (1) and air control valve (2), its characterized in that: the air inlet pipe (1) is arranged on an oven door or an upper protection plate (3) of the heat recovery coke oven, one end of the air inlet pipe (1) is communicated with a carbonization chamber of the heat recovery coke oven, the other end of the air inlet pipe is provided with an air regulating valve (2), and the air inlet direction of the air inlet pipe (1) is parallel to the carbonization chamber of the heat recovery coke oven;
the air regulating valve (2) comprises a shaft handle (21), a shaft sleeve (22), a disc (23) and a butterfly nut (24), wherein the shaft sleeve (22) is positioned in the air inlet pipe (1), and one end of the shaft sleeve (22) extends out of the air inlet pipe (1); one end of the shaft handle (21) extends into the shaft sleeve (22), the other end of the shaft handle extends out of the air inlet pipe (1), the shaft handle (21) is fixedly connected with the shaft sleeve (22) through a connecting piece, the butterfly nut (24) is in threaded connection with the top of the shaft sleeve (22), and the disc (23) is fixed on the shaft sleeve (22).
2. The primary air inlet for the heat recovery coke oven as claimed in claim 1, wherein the inner wall of the air inlet pipe (1) is further provided with a baffle ring (11).
3. The primary air intake for a heat recovery coke oven as claimed in claim 2, characterized in that the shaft shank (21) is configured to rotate the disk (23) in the air intake pipe (1).
4. The primary air inlet for the heat recovery coke oven as claimed in claim 2, characterized in that the air inlet pipe (1) is closed when the disk (23) is perpendicular to the axial direction of the air inlet pipe (1).
5. A primary air inlet for a heat recovery coke oven according to claim 1, characterized in that the air inlet pipe (1) is connected to the oven door or upper protection plate (3) by means of a flange (4).
6. The primary air inlet for the heat recovery coke oven as claimed in claim 1, wherein the aperture of the primary air inlet pipe (1) of the coke oven is 100mm-200 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121201470.6U CN215049886U (en) | 2021-06-01 | 2021-06-01 | Primary air inlet for heat recovery coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121201470.6U CN215049886U (en) | 2021-06-01 | 2021-06-01 | Primary air inlet for heat recovery coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215049886U true CN215049886U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121201470.6U Active CN215049886U (en) | 2021-06-01 | 2021-06-01 | Primary air inlet for heat recovery coke oven |
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| CN (1) | CN215049886U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940912A (en) * | 2022-04-29 | 2022-08-26 | 山东三木环保工程有限公司 | Automatic air door adjusting mechanism of waste gas shutter and waste gas shutter |
-
2021
- 2021-06-01 CN CN202121201470.6U patent/CN215049886U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940912A (en) * | 2022-04-29 | 2022-08-26 | 山东三木环保工程有限公司 | Automatic air door adjusting mechanism of waste gas shutter and waste gas shutter |
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