CN203878108U - Flame interference preventing structure for radiation chamber of ethylene cracking furnace - Google Patents

Abstract

The utility model discloses a flame interference preventing structure for a radiation chamber of an ethylene cracking furnace. A baffling block is adopted as the flame interference preventing structure, is arranged between two adjacent burners on the side walls of the radiation chamber and is vertical to the center line of the radiation chamber. According to the flame interference preventing structure disclosed by the utility model, the baffling block can prevent mutual flame interference of the two adjacent burners, the flame overlapping and the flame disturbance in the furnace are reduced, and the heat transfer effect in the furnace is guaranteed while the service life of the equipment is prolonged.

Description

Flame interference preventing structure of radiation chamber of ethylene cracking furnace

Technical Field

The utility model relates to a pyrolysis furnace field, more further, relates to an ethylene pyrolysis furnace radiation chamber prevents flame and interferes structure.

Background

The ethylene cracking furnace is a tap device in ethylene industry, the radiation chamber of the cracking furnace is a place for cracking reaction, the radiation and convection heat transfer is carried out between high-temperature flame and smoke generated by a burner and a radiation coil, and the materials in the pipe absorb heat to generate carbon chain breaking chemical reaction, thereby generating low molecular weight olefin. The efficiency of radiation heat transfer is directly affected by the combustion state in the radiation chamber, the flame flow pattern in the furnace, the heat transfer state of the radiation coil and the like, and the yield of low molecular weight olefins is finally affected.

As a heat generating device in the cracking furnace, the performance of the burner is crucial, and the effect of the flame shape directly influences the flow field of high-temperature flue gas in the furnace. At present, in use, abnormal combustion of the burners, flame shapes which do not reach the design state and mutual interference of flames of two adjacent bottom burners often occur due to installation, operation or fuel factors, and on one hand, a flame overlapping area is formed between the two adjacent burners, so that local overheating is caused; on the other hand, transverse flame can be formed in the furnace, transverse high-speed flowing smoke can be formed, the disturbance probability of the furnace tube is increased, the fatigue of the furnace tube can be caused, and the service life of equipment is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a flame interference prevention structure for a radiation chamber of an ethylene cracking furnace. The two adjacent burners can be prevented from mutual interference of flames, the overlapping of the flames is reduced, the disturbance of the flames in the furnace is reduced, the heat transfer effect in the furnace is ensured, and meanwhile, the service life of equipment is prolonged.

The utility model aims at providing an ethylene cracking furnace radiation chamber prevents flame interference structure.

The flame interference prevention structure is a baffling block, the baffling block is arranged between two adjacent burners on the side wall of the radiation chamber and is perpendicular to the central line of the radiation chamber.

Wherein,

the height of the baffling block is greater than the flame height of the burner;

the length of the baffling block is smaller than the distance between the center of the combustor and the side wall of the radiation chamber;

the width of the baffling block is 32-130 mm.

The baffle block is used for preventing flames of two adjacent burners from interfering with each other, the shape of the baffle block is not particularly limited as long as the baffle block can play a role of preventing flames of two adjacent burners from interfering with each other, and according to different flame shapes, the vertical cross-sectional shape of the baffle block is preferably as follows: one of a rectangle, a rectangular arc, a wedge arc, and a wedge.

The baffling block is formed by bonding refractory bricks, or is formed by pouring refractory castable or is formed by folding a ceramic fiber blanket.

The following technical scheme can be specifically adopted:

specifically, baffle blocks are arranged in the radiant chamber, the baffle blocks are uniformly arranged between two adjacent burners along the center line of the radiant chamber, and the baffle blocks are arranged on the side wall of the radiant chamber and are perpendicular to the center line of the radiant chamber.

Depending on the shape of the flame, different shapes of baffle blocks are possible: the vertical cross-sectional shape of the baffling block is as follows: one of a rectangle, a rectangular arc, a wedge arc, and a wedge.

The utility model discloses a baffling piece can prevent that double-phase adjacent combustor flame from interfering each other, reduces the flame and overlaps, reduces the interior flame disturbance of stove, when guaranteeing the stove interior heat transfer effect, has increased equipment life.

Drawings

FIG. 1 schematic view of the cracking furnace of the present invention

Fig. 2 is a schematic view of the structure of the baffle block of the present invention

Fig. 3 shows the structure of the baffle block in detail

FIG. 4-1 schematic view of baffle block configuration of example 1

FIGS. 4-2 schematic view of baffle block configuration of example 2

FIGS. 4-3 schematic views of baffle block structures of example 3

FIGS. 4-4 schematic views of baffle block configurations of example 4

Description of reference numerals:

1-a radiation chamber; 2-radiant coil pipe; 3-a burner; 4-baffling block; 5-refractory bricks; 6-adhesive; 10-radiation chamber midline; a-width of baffle block; b-baffle block width; l-baffle block height; m-burner flame height S-distance of burner center from radiant chamber side wall surface.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1

As shown in figure 1, the flame interference preventing structure of the radiation chamber of the ethylene cracking furnace is a baffle block 4, and the baffle block 4 is arranged between two adjacent burners 3 on the side wall of the radiation chamber and is perpendicular to the central line 10 of the radiation chamber.

The height of the baffling block is 4200mm, and the height of the flame of the burner is 3900 mm;

the length of the baffling block is 100mm, and the distance between the center of the burner and the side wall of the radiation chamber is 200 mm;

the width of the baffling block is equal to half of the length, namely 50 mm.

The baffling block is formed by bonding refractory bricks.

Example 2

The difference from the embodiment 1 is only that the vertical section of the baffling block is shaped as a rectangular arc. As shown in fig. 4-2.

Example 3

The difference from the embodiment 1 is only that the vertical section of the baffling block is shaped as a wedge-shaped arc. As shown in fig. 4-3.

Example 4

The difference from the embodiment 1 is that the vertical section of the baffling block is wedge-shaped. As shown in fig. 4-4.

Claims (4)

1. The utility model provides an ethylene cracking furnace radiation chamber prevents flame and interferes structure which characterized in that:

the flame interference prevention structure is a baffling block, the baffling block is arranged between two adjacent burners on the side wall of the radiation chamber and is perpendicular to the central line of the radiation chamber.

2. The structure of claim 1 for preventing flame interference in a radiation chamber of an ethylene cracking furnace, wherein:

the height of the baffling block is greater than the flame height of the burner; the length of the baffling block is smaller than the distance between the center of the burner and the side wall of the radiation chamber; the width of the baffling block is 32-130 mm.

3. The structure of claim 1 for preventing flame interference in a radiation chamber of an ethylene cracking furnace, wherein:

the vertical cross-sectional shape of the baffling block is as follows: one of a rectangle, a rectangular arc, a wedge arc, and a wedge.

4. The structure of the radiation chamber of the ethylene cracking furnace for preventing flame interference as claimed in any one of claims 1 to 3, wherein:

the baffling block is formed by bonding refractory bricks, or is formed by pouring refractory castable or is formed by folding a ceramic fiber blanket.