CN219449619U - Coke oven chute mouth structure - Google Patents

Abstract

The utility model relates to a coke oven chute port structure, which comprises a chute port, wherein the lower end of the chute port is communicated with a cellular regenerator, and the upper end of the chute port is communicated with a combustion chamber; the width of the lower end of the chute opening is larger than that of the upper end of the chute opening along the cell division direction of the regenerator, namely the machine side-coke side direction, and the two side surfaces of the chute opening are inclined surfaces. According to the utility model, the traditional chute opening with the equal-width structure is changed into the structure with the narrow upper part and the wide lower part, so that the descending air flow channel is suddenly reduced from the original upper end of the chute opening and suddenly enlarged from the lower end of the chute opening, the slow transition mode is improved, the distribution path of the descending air flow in the heat storage chamber is changed, the full heat exchange with the checker bricks is realized, the energy saving purpose is achieved, the structure is simple, and the construction is convenient.

Description

Coke oven chute mouth structure

Technical Field

The utility model relates to the technical field of coke ovens, in particular to a chute opening structure of a coke oven, which is beneficial to energy conservation.

Background

The coke oven consists of five parts, namely a regenerator, a chute, a carbonization chamber, a combustion chamber and a furnace top; the chute is positioned in the middle of the coke oven from the high position, the lower part of the chute is a regenerator, the upper part of the chute is a carbonization chamber and a combustion chamber, the carbonization chamber and the combustion chamber are arranged at intervals, the combustion chamber is arranged at both sides of each carbonization chamber, and the upper parts of the carbonization chamber and the combustion chamber are furnace top areas.

The large-scale coke oven generally adopts a cellular regenerator structure, and the space size of the cellular regenerator is as follows: about 2500mm in height, about 1000mm in length, and about 550mm in width. And stacking the checker bricks from top to bottom in the checker heat storage chamber. When the heat accumulation chamber is provided with an ascending airflow, air and lean gas pass through the checker bricks in the heat accumulation chamber, the process is a gas heat absorption process, the high-temperature checker bricks after heat accumulation transfer heat to the low-temperature gas, and the gas enters the combustion chamber through the chute port for combustion heat release after heat exchange; when the heat accumulating chamber is provided with descending air flow, waste gas in the combustion chamber enters the heat accumulating chamber through the inclined passage, and flows through the checker bricks in the heat accumulating chamber from top to bottom, wherein the process is an air heat release process, and high-temperature air transfers heat to low-temperature checker bricks to accumulate heat again; therefore, the heat exchange process when the air flow descends is limited to the heat exchange process when the air flow ascends, and the heat of the ascending air flow (air and lean gas) is derived from the heat of the descending air flow (waste gas), so that the heat exchange process between the high-temperature descending air flow and the checker bricks is important, and good heat exchange can play a role in saving energy. The heat exchange process is related to heat exchange area, gas flow and gas flow distribution, so that the optimal descending gas flow distribution form needs to be designed.

The Chinese patent application with the application publication number of CN111171846A discloses a novel coke oven chute area structure, which comprises a chute area arranged above a regenerator, a combustion chamber and below the carbonization chamber, wherein the bottom surface of the carbonization chamber is higher than the bottom surface of the corresponding combustion chamber at the chute opening. It can be seen from the cross-sectional view (fig. 1) of the combustion chamber-carbonization chamber direction that the chute port is a small upper port and a large lower port, but the view is not given in the other direction (perpendicular to the illustrated direction), whereas the conventional coke oven chute area has an equal width structure in this direction.

The Chinese patent application with the application publication number of CN112280571A discloses an adjustable coke oven chute mouth structure, which comprises a chute I and a chute II which are arranged side by side corresponding to the same vertical flame path, wherein nose bridge bricks are arranged between the chute I and the chute II; the nose bridge bricks are movably arranged at the top of the chute area masonry and can be replaced; and the side of the inclined channel I and the inclined channel II, which are far away from the nose bridge bricks, are respectively provided with an adjusting brick. As can be seen from the drawings, the chute mouth is also of an equal-width structure.

Disclosure of Invention

The utility model provides a coke oven chute mouth structure, which changes the chute mouth of the traditional equal-width structure into a structure form with a narrow upper part and a wide lower part, so that a descending air flow channel is suddenly reduced from the upper end of the chute mouth to the lower end of the chute mouth, and is improved into a slow transition form, thereby changing the distribution path of the descending air flow in a heat storage chamber, realizing the full heat exchange with checker bricks, achieving the purpose of energy conservation, and having simple structure and convenient construction.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

the coke oven chute port structure comprises a chute port, wherein the lower end of the chute port is communicated with a cellular regenerator, and the upper end of the chute port is communicated with a combustion chamber; the width of the lower end of the chute opening is larger than that of the upper end of the chute opening along the cell division direction of the regenerator, namely the machine side-coke side direction, and the two side surfaces of the chute opening are inclined surfaces.

Further, the chute opening is arranged corresponding to the middle part of the cellular regenerator.

Further, the ratio of the width of the lower end of the chute opening to the width of the upper end of the chute opening is not less than 3.

Further, the width of the lower end of the chute opening is smaller than that of the cellular regenerator.

Further, the vertical cross section of the slope opening is isosceles trapezoid.

Furthermore, the cell heat storage chambers are filled with checker bricks, and the checker bricks are of thin-wall porous structures.

Compared with the prior art, the utility model has the beneficial effects that:

1) By enlarging the opening size of the lower end of the inclined port, the inclined port is changed from a traditional constant-section structure into a continuous variable-section structure, so that the gas flows more smoothly, the contact area between the waste gas and the checker bricks is increased after the waste gas flows into the checker chambers, the gas flow distribution is more uniform, the heat exchange effect is better, and the energy conservation and consumption reduction are realized;

2) After the slope opening structure is improved, the resistance of the gas channel is reduced, the height of a coke oven chimney for providing suction force for the coke oven system is reduced, and the construction cost is saved;

3) The structure is simple, and the construction is convenient;

4) The method is suitable for top-loading coke ovens, tamping coke ovens and top-loading and tamping two-in-one coke ovens, and has strong applicability and wide application range.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view of a conventional coke oven chute mouth structure.

Fig. 2 is a schematic view of a chute mouth structure of a coke oven according to the present utility model.

Fig. 3 is a vertical cross-sectional shape of a conventional coke oven chute opening.

Fig. 4 is a vertical cross-sectional view of a coke oven chute mouth structure according to the utility model.

Reference numerals illustrate:

in the figure: the lower end 2/2' of the inclined passage opening, the upper end 3 of the inclined passage opening, the cellular regenerator 4, the waste gas flow 5 and the checker brick

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the structures referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:

as shown in fig. 1 and 3, in the conventional coke oven, the regenerators are divided into a plurality of divided regenerators 3 along the side direction of the coke oven machine side-the coke side, and an adjusting plate with adjustable size is arranged at the lower part of each divided regenerator to control the air flow distribution of the single divided regenerator, so that the heated mixed gas and air are distributed more reasonably in the longitudinal direction of the regenerators, the air flow distribution in the longitudinal direction of the combustion chamber is more uniform, and the uniformity of the longitudinal heating of the coke oven is improved. However, due to the fact that the traditional chute opening adopts the structure with the same width, the channel of the descending waste gas flow 5 is suddenly narrowed when entering the upper end 2' of the chute opening, and the channel is suddenly widened when flowing out from the lower end 1' of the chute opening, the structure form not only enables the flow of the waste gas flow 4 to be uneven and unstable, but also limits the checker bricks 5 which can be in direct contact with the waste gas flow 4 for heat exchange on the upper part of the checker chamber 3 to a local area close to the lower end 1' of the chute opening, and most of the checker bricks 5 on the outer side of the upper part of the checker chamber 3 do not participate in the direct heat exchange process, so that the heat exchange efficiency and the heat exchange effect of the checker chamber 3 are affected, and energy conservation and consumption reduction are not facilitated.

As shown in FIG. 2, the chute mouth structure of the coke oven comprises a chute mouth, wherein the lower end 1 of the chute mouth is communicated with a cellular regenerator 3, and the upper end 2 of the chute mouth is communicated with a combustion chamber; the width of the lower end 1 of the chute opening is larger than that of the upper end 2 of the chute opening along the cell division direction of the regenerator, namely the machine side-coke side direction, and the two side surfaces of the chute opening are inclined surfaces.

Further, the chute opening is arranged corresponding to the middle part of the cellular regenerator 3.

Further, the ratio of the width of the lower end 1 of the chute opening to the width of the upper end 2 of the chute opening is not less than 3.

Further, the width of the chute mouth lower end 1 is smaller than the width of the cellular regenerator 3.

Further, as shown in fig. 4, the vertical cross-section of the slope opening is isosceles trapezoid.

Furthermore, the checker bricks 5 are filled in the checker heat chamber 3, and the checker bricks 5 are of a thin-wall porous structure.

In order to make the purposes, technical schemes and technical effects of the embodiments of the present utility model more clear, the technical schemes in the embodiments of the present utility model will now be clearly and completely described. The embodiments described below are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without the benefit of the teachings of this utility model, are intended to be within the scope of the utility model.

[ example ]

As shown in fig. 2 and 4, in this embodiment, the chute port is arranged corresponding to the middle part of the cellular regenerator 3, the width of the lower end 1 of the chute port is 700mm, the width of the upper end 2 of the chute port is 150mm, the lower end 1 of the chute port is connected with the cellular regenerator 3, the width of the cellular regenerator 3 in the corresponding direction is 900mm, the upper end 2 of the chute port is connected with the combustion chamber, and the vertical section shape of the chute port is isosceles trapezoid.

In the process that the descending waste gas flow 4 flows from the upper end 2 of the inclined passage opening to the lower end 1 of the inclined passage opening, the flow passage of the waste gas flow 4 is gradually widened from narrow, then uniformly diffuses and flows into the corresponding cellular heat storage chamber 3, and fully exchanges heat with the cellular bricks 5 with the thin-wall porous structure, so that the heat exchange effect is better, the energy recovery is more complete, and the purposes of energy conservation and consumption reduction are achieved.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (5)

1. The coke oven chute port structure comprises a chute port, wherein the lower end of the chute port is communicated with a cellular regenerator, and the upper end of the chute port is communicated with a combustion chamber; the method is characterized in that the width of the lower end of the chute port is larger than that of the upper end of the chute port along the cell division direction of the regenerator, namely the machine side-coke side direction, and the two side surfaces of the chute port are inclined surfaces; the vertical cross section shape of the slope opening is isosceles trapezoid.

2. The chute port structure of a coke oven of claim 1, wherein the chute port is disposed corresponding to a central portion of the divided regenerator.

3. A coke oven chute mouth structure according to claim 1, wherein the ratio of the width of the chute mouth lower end to the width of the chute mouth upper end is not less than 3.

4. The coke oven chute port structure of claim 1, wherein the chute port lower end has a width less than the width of the cell regenerator.

5. A coke oven chute mouth structure according to claim 1, wherein the cell heat storage chambers are filled with checker bricks, the checker bricks being of thin-walled porous structure.