CN109913250B - Vertical furnace with double regenerator structures - Google Patents

Abstract

The invention relates to an upright furnace with a double-regenerator structure, which comprises a combustion chamber-carbonization chamber unit and a regenerator unit, wherein the combustion chamber-carbonization chamber unit is formed by alternately arranging a combustion chamber and a carbonization chamber, and the combustion chamber consists of an upper converging flue, a vertical flame path and a lower converging flue; the heat storage chamber unit comprises a heat storage chamber A and a heat storage chamber B, wherein the heat storage chamber A and the heat storage chamber B are respectively arranged at two sides of the combustion chamber-carbonization chamber unit, each of the heat storage chamber A and the heat storage chamber B consists of an upper heat storage chamber and a lower heat storage chamber, and partition walls are respectively arranged at the centers of an upper converging flue and a lower converging flue; the upper converging flues at two sides of the partition wall are respectively communicated with the upper heat storage chamber of the heat storage chamber A or the heat storage chamber B, and the lower converging flues at two sides of the partition wall are respectively communicated with the lower heat storage chamber of the heat storage chamber A or the heat storage chamber B. According to the invention, the regenerators are respectively arranged at the two sides of the vertical furnace, so that the raw gas can be prevented from leaking, and the pollution to the environment is reduced; and the heating uniformity of the furnace body can be improved, and the productivity and the investment cost performance can be improved.

Description

A vertical furnace with a double regenerator structure

Technical field

The invention relates to a vertical furnace body structure, and in particular to a vertical furnace with a double regenerator structure for low-rank coal carbonization.

Background technique

Vertical furnaces for low-rank coal carbonization were widely used in the production of city gas and semi-coke in the 1970s and 1980s. In recent years, with the development and utilization of low-quality lignite and the need for large amounts of pulverized coal to be upgraded and efficiently utilized, the vertical furnace technology of medium and low-temperature carbonization is often used to produce semi-coke and coal gas, and extract coal tar from them, and then Efficient utilization is achieved through deep processing.

At present, the furnace structure of the externally heated vertical furnace is composed of a carbonization chamber, a combustion chamber and a regenerator. As shown in Figures 1 and 2, the carbonization chamber 3 and the combustion chamber 2 occupy one side of the furnace body, and there are Enclosing wall 4, regenerator 1 occupies the other side of the furnace body. The carbonization chamber 3 and the combustion chamber 2 are arranged alternately. The carbonization chamber 3 between the two adjacent combustion chambers 2 is divided into a group of two doors; the regenerator 1 is composed of upper and lower regenerators 11 and 12. One end of the hot chamber 1 is connected to the combustion chamber 2, and the other end is connected to the exhaust gas switch. In the actual production process, there are two problems with the vertical furnace of this structure. First, because the carbonization chamber is a positive pressure system, coal is carbonized in the carbonization chamber to produce waste gas, which will leak into the atmosphere through the wall of the carbonization chamber and pollute the environment; second, due to the limitation of long-term heating uniformity, The length of the carbonization chamber cannot be increased, which will affect the production capacity. In the context of increasingly stringent national environmental protection policies, in order to expand the development and utilization of low-rank coal, it is necessary to innovate the vertical furnace structure to improve heating uniformity, reduce environmental pollution, and thus meet environmental protection requirements.

Contents of the invention

The invention provides a vertical furnace with a double regenerator structure. Regenerators are respectively provided on both sides of the vertical furnace, which can not only prevent the leakage of waste gas and reduce environmental pollution; it can also improve the heating uniformity of the furnace body. , improve production capacity and investment cost performance.

In order to achieve the above objects, the present invention adopts the following technical solutions:

A vertical furnace with a double regenerator structure, including a combustion chamber-carbonization chamber unit and a regenerator unit. The combustion chamber-carbonization chamber unit is composed of combustion chambers and carbonization chambers arranged alternately. The combustion chamber consists of an upper converging flue, It consists of a vertical fire channel and a lower converging flue; the regenerator unit includes regenerator A and regenerator B. Regenerator A and regenerator B are respectively located on both sides of the combustion chamber-carbonization chamber unit. Both hot chamber A and regenerator B are composed of an upper regenerator and a lower regenerator. Partition walls are respectively provided at the centers of the upper and lower converging flues; the upper converging flues on both sides of the partition wall The ducts are respectively connected with the upper regenerator of regenerator A or regenerator B on the corresponding side. The lower converging flues on both sides of the partition wall are respectively connected with the lower regenerator of regenerator A or regenerator B on the corresponding side. Thermal chambers are connected.

The top of the upper regenerator is provided with a small flue in the upper part of the regenerator, and the bottom is provided with a small flue in the lower part of the regenerator; the top of the lower regenerator is provided with a small flue in the upper part of the regenerator, and the bottom is provided with a small flue in the upper part of the regenerator. The small flue in the lower part of the chamber; the small flue in the upper part of the upper regenerator is connected to the upper confluence flue on the corresponding side; the small flue in the lower part of the lower regenerator is connected to the lower confluence flue on the corresponding side; the small flue in the lower part of the upper regenerator is connected The ends of the flue and the upper small flue of the lower regenerator away from the combustion chamber are respectively connected to the exhaust gas switch.

The upper regenerator chamber and the lower regenerator chamber are both filled with checker bricks.

Compared with the prior art, the beneficial effects of the present invention are:

Installing regenerators on both sides of the vertical furnace can not only prevent the leakage of waste gas and reduce environmental pollution; it can also improve the heating uniformity of the furnace body, improve production capacity and investment cost-effectiveness.

Description of the drawings

Figure 1 is a cross-sectional view of the regenerator-combustion chamber of a conventional externally heated vertical furnace.

Figure 2 is view A-A in Figure 1 .

Figure 3 is a regenerator-combustion chamber sectional view of a vertical furnace with a double regenerator structure according to the present invention.

FIG. 4 is view B-B in FIG. 3 .

In the picture: 1. Regenerator 1a. Regenerator A 1b. Regenerator B 11. Upper regenerator 12. Lower regenerator 2. Combustion chamber 21. Upper confluence flue 22. Vertical fire channel 23. Lower part Converged flue 3. Carbonization chamber 4. Enclosed wall 5. Partition wall 6. Exhaust gas switch

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figures 3 and 4, the vertical furnace with a double regenerator structure according to the present invention includes a combustion chamber-carbonization chamber unit and a regenerator unit. The combustion chamber-carbonization chamber unit consists of a combustion chamber 2 and a carbonization chamber unit. Chambers 3 are alternately arranged, in which the combustion chamber 2 is composed of an upper converging flue 21, a vertical fire passage 22 and a lower converging flue 23; the regenerator unit includes a regenerator A 1a and a regenerator B 1b. Chamber A 1a and regenerator B 1b are respectively located on both sides of the combustion chamber-carbonization chamber unit. Regenerator A 1a and regenerator B 1b are composed of an upper regenerator 11 and a lower regenerator 12. Partition walls 5 are respectively provided at the centers of the upper confluence flue 21 and the lower confluence flue 23; the upper confluence flue 21 on both sides of the partition wall 5 are connected to the regenerator A 1a or regenerator B 1b on the corresponding side respectively. The upper regenerator 11 is connected with each other, and the lower combined flues 23 on both sides of the partition wall 5 are respectively connected with the lower regenerator 12 of the regenerator A 1a or B 1b on the corresponding side.

The top of the upper regenerator 11 is provided with a small flue in the upper part of the regenerator, and the bottom is provided with a small flue in the lower part of the regenerator; the top of the lower regenerator 12 is provided with a small flue in the upper part of the regenerator, and the bottom is provided with a small flue in the upper part of the regenerator. The small flue at the bottom of the regenerator; the small flue at the upper part of the upper regenerator is connected with the upper confluence flue 21 on the corresponding side; the small flue at the bottom of the lower regenerator is connected with the lower confluence flue 23 on the corresponding side; The small flue in the lower part of the hot chamber and the small flue in the upper part of the lower regenerator are respectively connected to the exhaust gas switch 6 at one end away from the combustion chamber 2.

The upper regenerator 11 and the lower regenerator 12 are both filled with checker bricks.

As shown in Figure 1, the gas flow direction in a conventional externally heated vertical furnace is as shown in the figure. The air flow entering from the lower regenerator 12 passes through the lower confluence flue 23 of the combustion chamber 2 and enters the vertical fire channel of the combustion chamber 2. 22, the burned exhaust gas is discharged from the upper converging flue 21 through the upper regenerator 11. The exchanged gas flows in the opposite direction.

As shown in Figure 3, the gas flow direction of a vertical furnace with a double regenerator structure according to the present invention is as shown in the figure. From the regenerator A 1a and the regenerator B 1b on both sides of the combustion chamber-carbonization chamber unit The two airflows entering the corresponding two lower regenerators 12 pass through the lower converging flue 23 on the corresponding side and enter the vertical fire channel 22 of the corresponding side combustion chamber 2 for combustion. The burned exhaust gas passes through the corresponding side combustion chamber 2. The upper combined flue 21 is discharged through the two upper regenerators 11 corresponding to the regenerator A 1a and the regenerator B 1b respectively. The exchanged gas flows in the opposite direction.

The partition wall 5 is used to separate the two airflows from the regenerator A 1a and the regenerator B 1b on both sides, so that they enter the vertical fire channel 22 of the corresponding side combustion chamber 2 for combustion. This design It is beneficial to increase the heating uniformity in the long and high directions of the vertical furnace, reduce energy consumption, and increase energy utilization efficiency. It also makes it possible to further increase the length of the combustion chamber-carbonization chamber unit, which is conducive to the development of vertical furnaces in the direction of large-scale.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (1)

1. The vertical furnace with the double-regenerator structure comprises a combustion chamber-carbonization chamber unit and a regenerator unit, wherein the combustion chamber-carbonization chamber unit is formed by alternately arranging combustion chambers and carbonization chambers, and the combustion chamber consists of an upper converging flue, a vertical flame path and a lower converging flue; the combustion chamber is characterized in that the heat storage chamber unit comprises a heat storage chamber A and a heat storage chamber B, the heat storage chamber A and the heat storage chamber B are respectively arranged at two sides of the combustion chamber-carbonization chamber unit, the heat storage chamber A and the heat storage chamber B are respectively composed of an upper heat storage chamber and a lower heat storage chamber, and checker bricks are filled in the upper heat storage chamber and the lower heat storage chamber; partition walls are respectively arranged at the centers of the upper converging flue and the lower converging flue; the upper converging flues at two sides of the partition wall are respectively communicated with the upper heat storage chamber of the corresponding heat storage chamber A or the corresponding heat storage chamber B, and the lower converging flues at two sides of the partition wall are respectively communicated with the lower heat storage chamber of the corresponding heat storage chamber A or the corresponding heat storage chamber B; the top of the upper heat storage chamber is provided with a small flue at the upper part of the upper heat storage chamber, and the bottom of the upper heat storage chamber is provided with a small flue at the lower part of the upper heat storage chamber; the top of the lower heat storage chamber is provided with a small flue at the upper part of the lower heat storage chamber, and the bottom of the lower heat storage chamber is provided with a small flue at the lower part of the lower heat storage chamber; the small flue at the upper part of the upper regenerator is communicated with the converging flue at the upper part of the corresponding side, and the small flue at the lower part of the lower regenerator is communicated with the converging flue at the lower part of the corresponding side; the small flue at the lower part of the upper heat storage chamber and one end of the small flue at the upper part of the lower heat storage chamber, which is far away from the combustion chamber, are respectively connected with an exhaust gas shutter.