Volatile matter overflow channel of calcining furnace and calcining furnace

Abstract

A calcining furnace volatile matter overflow channel and a calcining furnace belong to the technical field of carbon petroleum coke calcining, the calcining furnace volatile matter overflow channel comprises a first volatile matter overflow port and a second volatile matter overflow port, the first volatile matter overflow port is arranged in an unoccupied space formed between the upper surface of the first volatile matter overflow port and the top of a material tank after the material is naturally stacked in the material tank, and the second volatile matter overflow port is arranged in the unoccupied space. The second volatile matter overflow opening is formed in the first-layer flame path, and the first volatile matter overflow opening and the second volatile matter overflow opening are connected through a volatile matter overflow channel which is arranged in a shortest straight line. According to the invention, the volatile component overflow port is arranged in the unoccupied space between the naturally stacked materials and the top of the charging bucket, and then is directly connected to the first-layer flame path at the shortest linear distance, so that a complicated furnace top volatile component overflow channel is canceled, the over-high temperature of the furnace surface and the front wall operation area caused by the combustion of the volatile components in the channel is avoided, and manpower and material resources are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon petroleum coke calcining, and in particular relates to a calcining furnace volatile matter overflow channel and a calcining furnace. Background Art

[0002] The calcination of domestic carbon petroleum coke is mainly based on carbon calcining furnaces. During the calcination process, the volatile matter escaping from the raw coke enters the fire channel from one end through the channels reserved in the furnace roof and side walls, mixes with the combustion air and burns, providing the required heat for the calcination process. The volatile matter overflow channel of the existing calcining furnace is often arranged with several volatile matter overflow ports and several volatile matter overflow channels above the furnace surface. For example, the Chinese patent application numbers are 201820920537.3 and 202310112104.0, and the volatile matter channel in the existing calcining furnace is complicated. It passes through complex horizontal and vertical channels with a long path, and finally is collected through a volatile matter channel collection channel arranged above the first-floor fire channel and then goes down into the first-floor fire channel. Since the escaping volatiles contain tar, dust and various alkane components, a large amount of coke, mainly tar, adheres to the channel wall along the way. As time goes by, it accumulates more and more, resulting in a reduction in the channel cross-section and an increase in resistance loss. Generally, the coke on the channel wall needs to be cleaned manually or automatically every two weeks. During the cleaning process, the negative pressure is unstable, smoke and fire appear on the furnace surface, the surrounding temperature is high, the working environment is harsh, and the labor intensity is high.

[0003] Although automatic purge systems can currently be used to replace manual operations, they also significantly increase investment costs. The complex piping system around the furnace also poses potential risks to the safety of operators. Summary of the invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a calcining furnace volatile matter overflow channel and a calcining furnace, in which the volatile matter overflow port is arranged in the empty space between the top of the material tank and the natural accumulation of the material, and then directly connected to the first-floor fire channel with the shortest straight-line distance, thereby eliminating the complicated furnace top volatile matter overflow channel, avoiding the excessively high temperature of the furnace surface and the front wall operating area caused by the combustion of volatile matter in the channel, and saving manpower and material resources.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include: A volatile matter overflow channel of a calcining furnace comprises a first volatile matter overflow port and a second volatile matter overflow port, wherein the first volatile matter overflow port is arranged in a vacant space formed between the upper surface of the material and the top of the material tank after the material is naturally accumulated in the material tank, and the second volatile matter overflow port is arranged in a first-layer fire channel, and the first volatile matter overflow port and the second volatile matter overflow port are connected by a volatile matter overflow channel arranged by the shortest straight line.

[0006] Furthermore, the first volatile component overflow port is arranged in an empty space formed between the upper surface of the material and the top of the material tank after the material is naturally accumulated to the top of the material tank in the material tank.

[0007] Furthermore, there are four first volatile component overflow outlets, which are respectively arranged at the four corners of the free space from the upper surface to the top of the material tank after the material in the material tank is naturally accumulated; there are four second volatile component overflow outlets, which are respectively arranged at both ends of the first-floor fire channel on both sides; the first volatile component overflow outlet is connected to the closest second volatile component overflow outlet through a volatile component overflow channel arranged by the shortest straight line.

[0008] Furthermore, the volatile matter overflow channel of the calcining furnace is built or processed by refractory masonry, and the cross-sectional shape of the channel is rectangular or circular.

[0009] A calcining furnace is provided with the calcining furnace volatile matter overflow channel.

[0010] The beneficial effects of the present invention are: The present invention eliminates the complex volatile channel of the traditional calcining furnace, reduces the length of the volatile channel, has a simple furnace structure, is convenient for construction, and no longer requires manual or automatic cleaning of the coking channel, thus saving a large amount of manpower, material resources and investment, and significantly improving the manual operation environment.

[0011] Since the traditional volatile channel is eliminated and the length of the volatile channel is reduced, the excessive temperature of the furnace surface and front wall operating area caused by the combustion of volatiles in the channel is avoided. The new structure will significantly reduce the temperature of the furnace surface and front wall operating area, which is conducive to the full utilization of heat.

[0012] The volatile matter overflow channel of the calcining furnace of the present invention makes the structure of the calcining furnace simpler, the construction is convenient, the furnace body is strengthened, and the service life of the calcining furnace is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial schematic diagram of the calcining furnace charge tank of the present invention; Figure 2 for Figure 1 Middle BB section view; Figure 3 for Figure 2 Middle CC section view.

[0014] In the figure: 1. calcining furnace; 2. material tank; 3. raw petroleum coke material; 4. free space; 5. first volatile matter overflow outlet; 6. second volatile matter overflow outlet; 7. volatile matter overflow channel; 8. first-layer fire channel; 9. middle fire channel; 10. last-layer fire channel; 11. fire channel partition wall; 12. negative pressure pull plate; 13. combustion air inlet. DETAILED DESCRIPTION

[0015] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0016] like Figure 1-3 The present invention as shown provides a calcining furnace volatiles overflow channel and a calcining furnace, wherein the calcining furnace volatiles overflow channel includes a first volatiles overflow port 5 and a second volatiles overflow port 6, wherein the first volatiles overflow port is arranged in the empty space formed between the upper surface of the material and the top of the material tank 2 after the material is naturally accumulated in the material tank 2. Specifically, the raw petroleum coke material 3 is added into the material tank 2 by the feeding hopper 14 arranged at the top of the material tank 2 and naturally accumulated, and the first volatiles overflow port 5 is arranged in the empty space 4 formed between the upper surface of the raw petroleum coke material 3 and the top of the material tank 2 after the material is naturally accumulated to the top of the material tank 2 in the material tank 2. The second volatiles overflow port 6 is arranged in the first-layer fire channel 8, and the first volatiles overflow port 5 and the second volatiles overflow port 6 are directly connected by a volatiles overflow channel 7 arranged by the shortest straight line.

[0017] Specifically, there are four first volatile component overflow outlets 5, which are respectively arranged at the four corners of the range from the upper surface of the material tank 2 to the free space 4 at the top of the material tank 2 after the material in the material tank 2 is naturally accumulated. There are four second volatile component overflow outlets 6, which are respectively arranged at both ends of the first-floor fire channel 8 on both sides of the material tank 2. The first volatile component overflow outlet 5 is connected to the closest second volatile component overflow outlet 6 through a volatile component overflow channel arranged by the shortest straight line.

[0018] Specifically, the volatile matter overflow channel of the calcining furnace is built or processed by refractory masonry, and the cross-sectional shape of the channel is rectangular, circular or other regular shapes.

[0019] The present invention also provides a calcining furnace, which has the volatile overflow channel of the calcining furnace. The middle part of the interior of the calcining furnace 1 is a material tank 2, and the two sides of the two tanks are fire channels. The fire channels on each side are respectively a first-layer fire channel 8, a plurality of intermediate fire channels 9, and a last-layer fire channel 10 from top to bottom, and each fire channel is separated by a fire channel partition wall 11. The top of the material tank 2 is connected to the charging hopper 14, the first-layer fire channel 8 is connected to the combustion air inlet 13, and a negative pressure pull plate 9 is set in the lower fire port area of ​​any intermediate fire channel 9 or the last-layer fire channel 10. Since the present invention eliminates the complex volatile overflow channel 7, the corresponding calcining furnace can eliminate the original multiple negative pressure pull plates 9, and only retain one negative pressure pull plate 9 to achieve the purpose of adjusting the negative pressure level in the fire channel by adjusting the negative pressure pull plate 9 to control the amount of volatiles entering the first-layer fire channel 8, so as to achieve the purpose of adjusting the temperature of the fire channel. Only the combustion air inlet 13 is provided with an air regulating door, and the amount of cold air entering the first-floor fire channel 8 is adjusted by the regulating door, and the temperature and pressure regulating system of the fire channel is formed together with the negative pressure pull plate 9. The calcining furnace structure of the present invention reduces the number of pull plates in the fire channel, and the calcining furnace is simpler to adjust the temperature and negative pressure, which also provides conditions for the calcining furnace to adopt a fully automatic temperature control system.

[0020] During operation, the raw petroleum coke material 3 enters the material box 2 of the calcining furnace 1 through the hopper 14. Under the action of gravity, the material slowly moves downward. During the movement and heating process, the volatile matter released by the raw coke moves upward into the empty space 4 formed between the upper surface of the material and the top of the material tank 2 after the material is naturally accumulated. Under the action of negative pressure, the volatile matter continues to enter the first-layer fire channel 8 through the volatile matter overflow channel 7, and is mixed with the cold air entering from the combustion air inlet 13 and then burned to provide the heat required for calcination. The high-temperature flue gas returns from the first-layer fire channel 8 to the middle fire channel 9 and the last-layer fire channel 10 in turn, and finally enters the subsequent waste heat utilization section from the summary flue.

[0021] The volatile matter released by the coke directly enters the first-floor fire channel 8 through the volatile matter overflow channel 7 set in the shortest straight line, without passing through the complicated traditional horizontal and vertical channels. There is no coking along the way, so there is no need to manually or automatically clean the coking channel. Even if the volatile matter overflow channel 7 is coked during long-term operation, it only needs to be simply cleaned with compressed air through the furnace surface cleaning door. Compared with the traditional cleaning method, it saves a lot of manpower and material resources, improves the operating environment, and significantly reduces the investment in furnace ancillary facilities.

[0022] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Alterations, modifications, substitutions and variations of the above embodiments by a person skilled in the art are all within the scope of the present invention.

Claims

1. A volatile matter overflow channel of a calcining furnace, comprising a first volatile matter overflow port and a second volatile matter overflow port, characterized in that: The first volatile component overflow outlet is arranged in the empty space formed between the upper surface of the material and the top of the material tank after the material is naturally accumulated in the material tank, and the second volatile component overflow outlet is arranged in the first-floor fire channel, and the first volatile component overflow outlet and the second volatile component overflow outlet are connected by a volatile component overflow channel arranged by the shortest straight line.

2. The volatile matter overflow channel of a calcining furnace according to claim 1, characterized in that: The first volatile component overflow port is arranged in the empty space formed between the upper surface of the material and the top of the material tank after the material is naturally accumulated to the top of the material tank in the material tank.

3. The volatile matter overflow channel of a calcining furnace according to claim 1, characterized in that: There are four first volatile component overflow outlets, which are respectively arranged at the four corners of the free space from the upper surface to the top of the material tank after the material in the material tank is naturally accumulated. There are four second volatile component overflow outlets, which are respectively arranged at both ends of the first-floor fire channel on both sides. The first volatile component overflow outlet is connected to the closest second volatile component overflow outlet through a volatile component overflow channel arranged by the shortest straight line.

4. The volatile matter overflow channel of a calcining furnace according to claim 1, characterized in that: The volatile matter overflow channel of the calcining furnace is built or processed by refractory material masonry, and the cross-sectional shape of the channel is rectangular or circular.

5. A calcining furnace, characterized in that: A calcining furnace volatile matter overflow channel is provided.

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