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Energy expansion transforming method for ethylene cracking furnace

An ethylene cracking furnace and furnace tube technology, which is used in cracking, hydrocarbon cracking to hydrocarbon production, and non-catalytic thermal cracking, etc. problems, to achieve the effect of less investment in construction, obvious effect of capacity expansion and transformation, and less difficulty in construction

Inactive Publication Date: 2012-09-12
WISON ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the second method to expand the capacity of the cracking furnace needs to arrange more radiation furnace tubes in the existing limited furnace, which results in a very large thermal intensity of the cracking furnace radiation furnace volume, and the shielding effect of the furnace tubes is also very serious. As a result, the operating cycle of the cracking furnace is very short and the service life of the furnace tube is not long. At present, many reformed cracking furnaces are performing load reduction operations.

Method used

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  • Energy expansion transforming method for ethylene cracking furnace
  • Energy expansion transforming method for ethylene cracking furnace
  • Energy expansion transforming method for ethylene cracking furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An ethylene production plant currently has a cracking furnace with naphtha as raw material. The size of the radiant section is (length) 19.636 meters × (height) 14.410 meters × (width) 4.210 meters; 24 groups of 4-1 type are arranged in the radiant furnace The radiant furnace tube extends out of the furnace roof, and the radiant furnace tube is also connected to the convection coil through a high-temperature cross-tube. Every 4 groups of radiant furnace tubes correspond to a quenching heat exchanger, and there are 6 sets in total. The quenching heat exchanger is also connected with a down pipe , rising pipe, pyrolysis gas pipe; there are 2 rows of bottom burners at the bottom of the furnace, a total of 36 sets; the convection section is equipped with convection coils from top to bottom to form a convection section: upper raw material preheating section (UFPH), boiler feed water preheating section (BFWPH), raw material preheating section (LFPH), upper raw material mixing ...

Embodiment 2

[0039] An ethylene production plant currently has a cracking furnace with naphtha as raw material. The size of the radiant section is (length) 19.636 meters × (height) 14.410 meters × (width) 4.210 meters; 24 groups of 4-1 type are arranged in the radiant furnace The radiant furnace tube extends out of the furnace roof, and the radiant furnace tube is also connected to the convection coil through a high-temperature cross-tube. Every 4 groups of radiant furnace tubes correspond to a quenching heat exchanger, and there are 6 sets in total. The quenching heat exchanger is also connected with a down pipe , rising pipe, pyrolysis gas pipe; there are 2 rows of bottom burners at the bottom of the furnace, a total of 36 sets; the convection section is equipped with convection coils from top to bottom to form a convection section: upper raw material preheating section (UFPH), boiler feed water preheating section (BFWPH), raw material preheating section (LFPH), upper raw material mixing ...

Embodiment 3

[0045]An ethylene production plant currently has a cracking furnace with ethane as raw material. The size of the radiant section is (length) 16.600 meters × (height) 14.435 meters × (width) 4.220 meters; 6 groups of 4-2-1 are arranged in the radiant furnace -1-1-1 type radiant furnace tube extends out of the furnace roof, and the radiant furnace tube is also connected to the convection coil tube through a high-temperature cross-tube. Every two groups of radiant furnace tubes correspond to a quenching heat exchanger, and there are 3 sets in total. The heater is also connected with a downpipe, an uppipe, and a pyrolysis gas pipe; there are 2 rows of bottom burners at the bottom of the furnace, a total of 24 sets; the high side wall is equipped with 3 rows of side wall burners, a total of 36 sets; There are 2 rows of side wall burners, with a total of 24 sets; the convection section is equipped with convection coils from top to bottom to form the convection section: raw material p...

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Abstract

The invention relates to an energy expansion transforming method for an ethylene cracking furnace, and the method ocmprises the following steps of: outwards moving a high-side wall to expand the radiation section of the cracking furnace when the furnace is transformed, additionally arranging a plurality of radiation furnace tubes in the radiation section and arranging a corresponding quenching heat exchanger; and arranging a corresponding bottom burner at the radiation section of the expansion part. Compared with the prior art, the energy expansion transforming method can be used for greatly improving the production capacity of the cracking furnace, the other performances of the cracking furnace can be correspondingly improved, and the existing cracking furnace is transformed by utilizing the method, so that the building area can be saved, the original equipment can be furthest used, the energy expansion transforming method has the advantages of less building investment and the like.

Description

technical field [0001] The invention belongs to the field of hydrocarbon oil cracking equipment, and in particular relates to a method for expanding the capacity of an ethylene cracking furnace. Background technique [0002] In recent years, major ethylene production enterprises have carried out capacity expansion and transformation of their ethylene plants. At the same time, they need to expand the capacity of the cracking furnace area. There are two ways to expand the capacity of the cracking furnace area. One is to add an appropriate amount cracking furnace, and the other is based on the existing cracking furnace for capacity expansion. Using the second method to expand the capacity of the cracking furnace needs to arrange more radiant furnace tubes in the existing limited furnace, which results in a very large thermal intensity of the cracking furnace radiant furnace volume, and the shielding effect of the furnace tubes is also very serious. As a result, the operating c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/20C07C11/04C07C4/02
Inventor 涂国华张磊李保有
Owner WISON ENG