JPS58167673A - Riser in coke oven - Google Patents

Abstract

PURPOSE:A short tube supporting heat transfer pipes are connected to the riser by means of a flange, the short tubes are equipped with a hood and connected to the inlet and outlet for the heat transfer medium at both ends of the heat transfer pipe, thus permitting the recovery of the heat in the coke oven gas. CONSTITUTION:A short tube 6 supporting heat transfer pipes 8 vertically down is connected by means of a flange to the top of the existing riser 3 and covered with a hood 7 at the top and then both ends of the heat transfer pipe 6 are connected to the outlet 10 and inlet 9 for the heat medium, thus recovering the heat in the coke oven gas by exchanging the sensitive heat with the heat medium in the heat transfer pipe 8. Even when the heat transfer pipe is damaged or inspected, only the heat-transfer pipe is demounted for repairing and inspection without demounting the whole riser. The heat transfer pipe 8 is preferably annularly hung down along the inner wall of the riser except the inlet of the bent tube 5 at the part higher than the bent tube inlet.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a riser having a heat exchange device for recovering sensible heat possessed by coke oven gas in the riser.

Among the waste heat from the Coconu furnace, coke dry extinguishing equipment is installed at each company to deal with the largest coke sensible heat.
Effective coke 7 sensible heat recovery is in place.

However, various proposals have been made regarding the recovery of the second largest coke oven gas, but none have been put into practical use.

In other words, in order to recover sensible heat from coke oven generated gas in the riser pipe, a heat exchanger is connected to a heat transfer tube installed on the inner wall of the riser pipe to circulate an organic heat medium, and sensible heat is recovered through the organic heat medium. A method for recovering heat from coke oven gas (Japanese Unexamined Patent Publication No. 55-40736), which is characterized by recovering heat, or a method in which a heat transfer tube is installed on the inner wall of a riser pipe, water is supplied, and steam is recovered as hot water. Recovery methods have been proposed, such as a method of preheating the heat exchanger tube by passing combustion air, gas, etc., and lowering the fuel consumption rate.

However, with all of the above methods, it is necessary to install heat transfer tubes on the inner wall of the riser pipe, and not only do the existing riser tubes have to be completely replaced, but if the heat transfer tubes are damaged, the entire riser tube must be removed and repaired. Furthermore, when the heating medium is stopped, the riser pipes are abnormally heated, so cooling with a refrigerant is required.

This invention allows the existing riser pipe to be used as is, and even if the heat transfer tube is damaged, it can be repaired without removing the entire riser pipe, and the riser pipe can be repaired without abnormal heating. A coke oven riser tube equipped with a sensible heat recovery device is provided.

That is, this invention has a heat medium inlet pipe and a heat medium outlet in which a short pipe supporting a heat transfer tube and hanging down is connected to the top of the riser pipe with 7 langes, a fire lid is provided at the upper end of the short pipe, and both ends of the heat transfer tube are provided in the short pipe. This is a coke oven riser pipe characterized by being connected to an outlet pipe.

The details of the present invention will be explained below based on the drawings showing an example of implementation.

In the drawings, (1) is a coke oven, (2) is a carbonization chamber, (
3) is the rising pipe, (4) is the air collection main, (5) is the rising pipe (3)
) and the main air collection pipe (4).
) The coke oven gas generated in the coke oven gas is collected into the gas collecting main pipe (4) via the riser pipe (3) and the bend pipe (5), and is discharged to the gas purification process by a blower (not shown).

(6) is a short pipe connected by a flange to the top of the riser pipe (3), and a canopy (7) is provided at the upper end of the short pipe (6).

(8) is a heat transfer tube that is connected and supported by the heat medium inlet pipe (9) and the heat medium outlet pipe α1 provided in the short pipe (6);
As shown in the figure, the upper part of the bend pipe (5) is
Along the inner wall of the riser pipe (3) excluding the inlet part of the bend pipe (5), the lower part is arranged in an annular shape around the inner circumference of the riser pipe (3) as shown in Figure 3, and the lower end is connected to the top of the furnace. It is inserted halfway to the ceiling of the carbonization chamber (2). The heating medium is the inlet pipe (9)
It enters the heat exchanger tube (8) from the riser tube (3) and is heated by exchanging heat with the high temperature coke oven gas rising in the riser tube (3).
The structure is such that the heat is extracted from the heat source and sent to the heat utilization process.

Note that α◇ is the lining brick of the riser pipe (3).

With the above configuration, a part of the sensible heat possessed by the coke oven gas is recovered by exchanging heat with the heat medium in the heat transfer tube (8), and the heat transfer tube (8) is connected to the short tube (6). It is connected and supported by the heat medium inlet pipe (9) and the heat medium outlet pipe αO, and is inserted from the top of the existing riser pipe (3). ) and will not interfere with the operation of the coke oven.Also, even if the heat transfer tube (8) is removed, the riser tube (3) is protected by the lining brick 0η, so it will not cause abnormal overheating. It will not be done.

Further, the heat transfer tube (8) is arranged in an annular shape around the inner circumference of the riser tube (3), and above the inlet portion of the bend tube (5),
Since it is arranged along the inner wall of the riser pipe (3) except for the inlet part of the bend pipe (5), the resistance of the generated coke oven gas is small. This will not cause any hindrance to the carbon removal work.

In addition, as the heat medium to be fed into the heat transfer tube (8), air,
It is possible to use either water or organic heat transfer oil, but the heat recovery rate
Organic heat transfer oil is advantageous when considering the presence or absence of government inspections, but it may be selected depending on the place where the recovered heat will be used.

In addition, although the heat exchanger tube (8) is U-shaped in the example,
It is also possible to have a serpentine tube shape, and the heat transfer area can also be changed arbitrarily.

As described above, the present invention provides a heat transfer pipe, a heat transfer pipe, and a heat transfer pipe in which a short pipe supporting a heat transfer tube is connected to the top of an existing riser pipe with a 7-way connection, a fire cover is provided at the upper end, and both ends of the heat transfer pipe are provided as short pipes. Because it is connected to the extraction pipe, it is possible to extract only the heat exchanger tube for repair and inspection without having to remove the entire riser pipe when performing a heat transfer inspection, etc., and to prevent abnormal heating of the riser pipe when the heat transfer tube is removed. There's nothing wrong with that.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. jJ1 is an overall side sectional view, FIG. 2 is a parent view taken along A-A in FIG. 1, and FIG. 3 is a parent view taken along B-B in FIG. 1. . 1... Coke oven, 2... Carbonization chamber, 3... Rising pipe, 4... Air collecting main pipe, 5... Bend pipe, 6... Short pipe, 7... Canopy, 8... Heat exchanger tube, 9... Heat medium feed pipe, 10... Heat medium extraction pipe, 11... Lining brick. Applicant Sumikin Chemical Co., Ltd. Sumitomo Metal Industries Co., Ltd. Agent Press 1) Figure 1 Figure 2 / 463-

Claims (1)

[Scope of Claims] 1 A heat medium inlet pipe and a heat medium outlet pipe in which a short pipe that supports a heat transfer tube and hangs down is connected to the top of the riser pipe, a canopy is provided at the upper end, and both ends of the heat transfer tube are provided as short pipes. A coke oven riser pipe characterized in that it is connected to a coke oven riser pipe. 2. Claims characterized in that the upper part of the heat exchanger tube than the bent pipe inlet part extends along the inner wall of the riser pipe excluding the inlet part of the bend pipe, and the lower part hangs in an annular shape around the entire circumference of the riser pipe. The coke oven riser pipe according to item 1.