CN211170596U - Decoking system of ethylene cracking furnace - Google Patents
Decoking system of ethylene cracking furnace Download PDFInfo
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- CN211170596U CN211170596U CN201921422407.8U CN201921422407U CN211170596U CN 211170596 U CN211170596 U CN 211170596U CN 201921422407 U CN201921422407 U CN 201921422407U CN 211170596 U CN211170596 U CN 211170596U
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Abstract
A decoking system of an ethylene cracking furnace comprises a hearth, a radiation furnace tube arranged in the hearth and a plurality of decoking openings arranged on two sides of the hearth, wherein the decoking system comprises at least one decoking tank and a first decoking pipeline; the decoking tank is arranged between the outlet of the radiation furnace tube and the coking opening and is used for removing coke particles in the coking gas; the first coke cleaning pipeline is connected between the coke cleaning tank and the coke burning opening and respectively arranged at two sides of the hearth. The utility model relates to an ethylene cracking furnace coke cleaning system, which arranges the first coke cleaning pipelines at the two sides of the hearth, thereby saving the compact space at the bottom of the hearth and enabling the distribution of the coke-burning gas to be more evenly dispersed; the burnt gas can be through being located the even access to of the first decoking pipeline in furnace both sides to the mouth of burning after the decoking jar is decoked, alleviates the deposit of the burnt granule in the burnt gas in furnace, improves mobile effect and combustion effect.
Description
Technical Field
The utility model belongs to hydrocarbon processing field, more specifically relates to an ethylene cracking furnace decoking system.
Background
With the increasing requirements of the country on environmental protection at present, the petrochemical industries pay attention to the emission and treatment of waste gas.
Ethylene is used as an important chemical raw material, and the main process for producing ethylene is that hydrocarbon raw materials are cracked at high temperature in a cracking furnace, and the generated cracking gas is quenched by a quenching heat exchanger or a quencher and then flows to a downstream processing system. The cracking furnace needs to carry out coking treatment on coke particles generated in the radiation furnace tube and the cracking gas pipeline regularly, and the coking products (coke particles, carbon oxides, water vapor and the like) generated by coking cannot be directly discharged to the outside due to the environmental protection requirement.
At present, in the return hearth coking system adopting the foreign patent technology, the arrangement of a coke cleaning tank and a return hearth pipeline is single, the good shunting of the coking gas cannot be realized only by the uniform arrangement of the return hearth pipeline, the burning of coke particles can be insufficient, the burning effect is poor after the coke particles return to the hearth, the heat field distribution in the hearth is disturbed, the pipeline arrangement space is compact, and the flowing effect is influenced.
Therefore, there is a need to develop a coke cleaning system for an ethylene cracking furnace with uniform distribution of coke-burning gas, which can realize good shunting of coke-burning gas and improve combustion effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ethylene cracking furnace coke cleaning system can realize the good reposition of redundant personnel of burnt gas, makes burnt gas flow evenly distributed.
In order to achieve the above object, the utility model provides an ethylene cracking furnace decoking system, the ethylene cracking furnace includes furnace, radiation furnace pipe and locates a plurality of burning mouths of the stove bottom both sides of furnace, radiation furnace pipe and furnace intercommunication, decoking system includes at least one decoking jar and first decoking pipeline;
the decoking tank is arranged between the outlet of the radiation furnace tube and the coking opening and is used for removing coke particles in the coking gas;
the first coke cleaning pipeline is connected between the coke cleaning tank and the coke burning opening, and the first coke cleaning pipeline is arranged on two sides of the hearth.
Preferably, a coke cleaning valve is arranged between the outlet of the radiation furnace tube and the inlet of the coke cleaning tank.
Preferably, the coke cleaning device further comprises a plurality of second coke cleaning pipelines, and each coke cleaning port is communicated with the first coke cleaning pipeline through one second coke cleaning pipeline.
Preferably, the plurality of second decoking pipelines are respectively arranged at two sides of the furnace, the first decoking pipeline comprises a first pipe section and a second pipe section which are respectively arranged at two sides of the furnace, the second decoking pipelines arranged at one side of the furnace are both connected to the first pipe section, and the second decoking pipelines arranged at the other side of the furnace are both connected to the second pipe section.
Preferably, the coke cleaning tank is one, and the first pipe section and the second pipe section are both connected to an outlet of the coke cleaning tank.
Preferably, the number of the coke cleaning tanks is two, and the inlet of each coke cleaning tank is connected to the coke cleaning valve; the outlet of one coke cleaning tank is communicated with the first pipe section, and the outlet of the other coke cleaning tank is communicated with the second pipe section.
Preferably, the number of the hearth, the coke cleaning tank and the coke cleaning valve is two, and the radiation furnace tube of each hearth is communicated with the inlet of one coke cleaning tank through one coke cleaning valve.
Preferably, the coke cleaning furnace further comprises a third pipe section and a fourth pipe section which are arranged on two sides of the furnace and respectively connected to outlets of the coke cleaning valves, a plurality of coke cleaning tanks are arranged, a plurality of first coke cleaning pipelines are arranged, the plurality of coke cleaning tanks are respectively arranged on two sides of the furnace, and each coke burning port is communicated with an outlet of one coke cleaning tank through one first coke cleaning pipeline;
and the inlets of the coke cleaning tanks arranged on one side of the hearth are communicated with the third pipe section, and the inlets of the coke cleaning tanks arranged on the other side of the hearth are communicated with the fourth pipe section.
Preferably, the number of the hearth and the decoking valve is two, and the radiation furnace tube in each hearth is connected to the inlet of one decoking valve.
Preferably, the furnace further comprises a third coke cleaning pipeline, the third pipe section and the fourth pipe section on two sides of each furnace are connected to one end of the third coke cleaning pipeline, and the outlet of each coke cleaning valve is connected to the other end of the third coke cleaning pipeline.
Preferably, the second decoking pipelines are divided into a plurality of groups of pipeline units, each group of pipeline units comprises a plurality of second decoking pipelines, the plurality of groups of pipeline units arranged on one side of the furnace are connected in parallel with the first pipe section through branches, and the plurality of groups of pipeline units arranged on the other side of the furnace are connected in parallel with the second pipe section through branches.
Preferably, the pipe diameter of the second decoking pipeline far away from the connection of the branch and the first pipe section or the second pipe section is larger than the pipe diameter of the second decoking pipeline close to the connection of the branch and the first pipe section or the second pipe section.
The utility model relates to a coke cleaning system of ethylene cracking furnace, its beneficial effect lies in: the first coke cleaning pipelines are arranged on the two sides of the hearth, so that the compact space at the bottom of the hearth can be saved, and the distribution of the coke-burning gas is more uniformly dispersed; the burnt gas can evenly lead to the burnt opening after being cleared by the coke clearing tank, thereby relieving the deposition of coke particles in the burnt gas in the hearth and improving the flowing effect and the combustion effect.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
FIG. 1 shows a schematic diagram of an ethylene cracking furnace decoking system of an exemplary embodiment of the present invention;
FIG. 2 shows a schematic view of an ethylene cracking furnace decoking system of another exemplary embodiment of the present invention;
FIG. 3 shows a schematic view of an ethylene cracking furnace decoking system of another exemplary embodiment of the present invention;
FIG. 4 shows a schematic diagram of an ethylene cracking furnace decoking system of another exemplary embodiment of the present invention;
FIG. 5 shows a schematic view of an ethylene cracking furnace decoking system of another exemplary embodiment of the present invention;
FIG. 6 shows a schematic view of an ethylene cracking furnace decoking system of another exemplary embodiment of the present invention;
FIG. 7 shows a schematic view of an ethylene cracking furnace decoking system of another exemplary embodiment of the present invention;
description of reference numerals:
1 furnace, 2 burning mouths, 3 coke cleaning tanks, 4 first coke cleaning pipelines, 5 coke cleaning valves, 6 second coke cleaning pipelines, 7 third coke cleaning pipelines and 8 branches.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to solve the problems in the prior art, the utility model provides a decoking system of an ethylene cracking furnace, wherein the ethylene cracking furnace comprises a furnace chamber, a radiation furnace tube and a plurality of decoking openings arranged at two sides of the furnace bottom of the furnace chamber, the radiation furnace tube is communicated with the furnace chamber, and the decoking system comprises at least one decoking tank and a first decoking pipeline;
the decoking tank is arranged between the outlet of the radiation furnace tube and the coking opening and is used for removing coke particles in the coking gas;
the first coke cleaning pipeline is connected between the coke cleaning tank and the coke burning port and used for outputting the coke burning gas generated after coke particles are removed from the coke cleaning tank to the coke burning port so as to return to the hearth, and the first coke cleaning pipeline is arranged on two sides of the hearth.
The coke cleaning system of the ethylene cracking furnace provided by the utility model has the advantages that the first coke cleaning pipelines are arranged at the two sides of the furnace hearth, so that the compact space at the bottom of the furnace hearth can be saved, and the distribution of the coke-burning gas is more uniformly dispersed; the burnt gas can be through being located the even access to of the first decoking pipeline in furnace both sides to the mouth of burning after the decoking jar is decoked, alleviates the deposit of the burnt granule in the burnt gas in furnace, improves mobile effect and combustion effect.
The ethylene cracking furnace also comprises a quenching system, wherein the coke-burning gas in the hearth is discharged from the radiation furnace tube, then is cooled by the quenching system, and then is cleared of coke particles by the coke clearing system; the quenching system is prior art and therefore not described in detail.
Preferably, a coke cleaning valve is arranged between the outlet of the radiation furnace tube and the inlet of the coke cleaning tank and used for controlling the opening and closing of the coke cleaning system, and when coke particles generated in the cracking furnace need to be cleaned, the coke cleaning valve is opened to enable the coke-burning gas coming out of the radiation furnace tube to enter the coke cleaning system for cleaning, and then the coke-burning gas is conveyed back to the coke-burning opening and returns to the hearth again. The structure of the coke cleaning tank and the process of cleaning the coke gas by the coke cleaning tank are the prior art, and are not described again.
Preferably, a plurality of second coke cleaning pipelines are further included, and each coke cleaning opening is communicated with the first coke cleaning pipeline through one second coke cleaning pipeline.
Preferably, the number of the second coke cleaning pipelines and the number of the coke burning openings are the same, so that the coke burning gas in the first coke cleaning pipeline is uniformly distributed.
Preferably, a plurality of second coke cleaning pipelines are respectively arranged at two sides of the hearth, the second coke cleaning pipelines are arranged at two sides of the hearth and are communicated with the coke burning opening and the coke cleaning tank through the first coke cleaning pipelines, so that the space at the bottom of the hearth is saved, and the shunting of the coke burning gas is more uniform.
The first decoking pipeline comprises a first pipe section and a second pipe section which are respectively arranged on two sides of the hearth, the second decoking pipeline arranged on one side of the hearth is connected to the first pipe section, and the second decoking pipeline arranged on the other side of the hearth is connected to the second pipe section.
Preferably, the second decoking pipelines arranged on two sides of the hearth are divided into a plurality of groups of pipeline units, each group of pipeline units comprises a plurality of second decoking pipelines, the first decoking pipeline comprises a first pipe section and a second pipe section which are respectively arranged on two sides of the hearth, the plurality of groups of pipeline units arranged on one side of the hearth are connected in parallel with the first pipe section through branches, and the plurality of groups of pipeline units arranged on the other side of the hearth are connected in parallel with the second pipe section through branches. The coke-burning gas after the coke cleaning of the coke cleaning tank is output to the first coke cleaning pipeline, enters each group of pipeline units in a grading manner, and is conveyed into the coke-burning port by each second coke cleaning pipeline. The graded arrangement of pipelines enables the flow distribution to be more uniform.
Preferably, the pipe diameter of the second decoking pipeline far away from the connection part of the branch and the first pipe section or the second pipe section is larger than that of the second decoking pipeline close to the connection part of the branch and the first pipe section or the second pipe section, so that the flow distribution of the pipeline is uniform.
Preferably, the first pipe section or the second pipe section is connected to the middle of the branch, and the pipe diameter of the second coke cleaning pipeline close to the two ends of the branch is larger than that of the second coke cleaning pipeline close to the middle of the branch.
Preferably, the coke cleaning tank is one, and the first pipe section and the second pipe section are both connected to the outlet of the coke cleaning tank.
When the coke cleaning valve is opened, the coke-burning gas firstly enters the coke cleaning tank to be cleaned of coke particles, then is uniformly distributed to each second coke cleaning pipeline through the first pipe section and the second pipe section respectively, and enters each coke-burning opening communicated with the second coke cleaning pipeline, so as to return to the hearth. This pipeline arrangement mode makes the burnt gas flow evenly distributed who leads to the burning mouth, and practices thrift furnace bottom space, and the burnt granule in the burnt gas is after through the preliminary clearance of coke cleaning tank, and partial deposit when first coke cleaning pipeline and/or second coke cleaning pipeline to obtain further clearance.
Preferably, the number of the coke cleaning tanks is two, and the inlet of each coke cleaning tank is connected to the outlet of the coke cleaning valve; wherein, the outlet of one coke cleaning tank is communicated with the first pipe section, and the outlet of the other coke cleaning tank is communicated with the second pipe section. When the coke cleaning valve is opened, the coke-burning gas respectively enters the two coke cleaning tanks for coke cleaning treatment, then passes through the first pipe section or the second pipe section and then enters each coke-burning opening through the second coke cleaning pipeline.
Set up two clear burnt jars, make simultaneously through the clear burnt jar carry out the burnt gas flow that decoking was handled more, the decoking effect is better, the burnt gas reposition of redundant personnel after the clear burnt returns furnace to furnace's both sides through the mouth of burning, flow distribution is more even, and practices thrift furnace bottom space.
Preferably, the number of the hearths, the coke cleaning tanks and the coke cleaning valves is two, and the radiation furnace tube of each hearth is communicated with the inlet of one coke cleaning tank through one coke cleaning valve.
When the ethylene cracking furnace is a double-hearth furnace, namely two hearths are provided, the decoking valve communicated with each hearth is opened, the burnt gas of each hearth is treated by one decoking tank and then is divided to two sides of the hearth and then returns to the hearth, so that the burnt gas flow is uniformly distributed.
Preferably, the coke cleaning system further comprises a third pipe section and a fourth pipe section which are arranged on two sides of the hearth and respectively connected to outlets of the coke cleaning valves, a plurality of coke cleaning tanks are arranged, the first coke cleaning pipelines are multiple, the plurality of coke cleaning tanks are respectively arranged on two sides of the hearth, and each coke burning opening is communicated with an outlet of one coke cleaning tank through one first coke cleaning pipeline;
the inlet of the coke cleaning tank arranged on one side of the hearth is communicated with the third pipe section, and the inlet of the coke cleaning tank arranged on the other side of the hearth is communicated with the fourth pipe section. When the coke cleaning valve is opened, the burnt gas is shunted to the two sides of the hearth through the third pipe section and the fourth pipe section, then the burnt particle removal treatment is carried out through the plurality of coke cleaning tanks, and the treated burnt gas returns to the hearth through the first coke cleaning pipeline and the coke cleaning opening. The burnt gas through every burning mouth all handles through a decoking jar, and the decoking effect is handled better, and is efficient, and flow distribution is even, improves the burning effect that the burnt gas returned in the furnace.
Preferably, the number of the hearths and the decoking valves is two, the radiation furnace tube in each hearth is connected to the inlet of one decoking valve, and the outlet of each decoking valve is communicated with the third tube section and the fourth tube section which are communicated with the inlets of the decoking valves and are arranged on two sides of the hearth; when the ethylene cracking furnace is a double-hearth furnace, namely two hearths are provided, the decoking process of each hearth is respectively controlled by the decoking valve communicated with each hearth, and the operation convenience of the decoking process is improved on the basis of uniform distribution.
Preferably, the decoking system further comprises a third decoking pipeline, the third pipe section and the fourth pipe section on two sides of each furnace are connected to one end of the third decoking pipeline, and the outlet of each decoking valve is connected to the other end of the third decoking pipeline. The connection of two coke cleaning valves is in the third coke cleaning pipeline, makes the burnt gas homoenergetic in the radiant furnace pipe of every furnace shunt to the both sides of two furnaces, improves the reposition of redundant personnel effect, makes the flow distribution of burnt gas more even.
Example 1
As shown in fig. 1, the utility model provides an ethylene cracking furnace decoking system, the ethylene cracking furnace comprises a furnace 1, a radiation furnace tube arranged in the furnace 1 and a plurality of decoking ports 2 arranged at two sides of the furnace 1, the decoking system comprises at least one decoking tank 3 and a first decoking pipeline 4;
the coke cleaning tank 3 is arranged between the outlet of the radiation furnace tube and the coke burning port 2 and is used for removing coke particles in the coke burning gas;
the first decoking pipeline 4 is connected between the decoking tank 3 and the coking port 2, and the first decoking pipeline 4 is arranged on two sides of the hearth 1.
In the embodiment, a coke cleaning valve 5 is arranged between the outlet of the radiation furnace tube and the inlet of the coke cleaning tank 3.
In the embodiment, a plurality of second decoking pipelines 6 are further included, and each decoking port 2 is communicated with the first decoking pipeline 4 through one second decoking pipeline 6.
In the present embodiment, the number of the second decoking lines 6 is the same as the number of the coke ports 2.
In this embodiment, the plurality of second decoking pipelines 6 are respectively arranged on two sides of the furnace 1, the first decoking pipeline 4 comprises a first pipe section and a second pipe section which are respectively arranged on two sides of the furnace, the second decoking pipelines 6 arranged on one side of the furnace 1 are both connected to the first pipe section, and the second decoking pipelines 6 arranged on the other side of the furnace 1 are both connected to the second pipe section.
In this embodiment, there is one coke cleaning tank 3, and the first pipe section and the second pipe section are both connected to the outlet of the coke cleaning tank 3.
Example 2
As shown in fig. 2, the decoking system of the ethylene cracking furnace according to example 2 is different from that of example 1 in that:
in this embodiment, there are two coke cleaning tanks 3, the inlet of each coke cleaning tank 3 is connected to the outlet of the coke cleaning valve 5, the outlet of one coke cleaning tank 3 is communicated with the first pipe section, and the outlet of the other coke cleaning tank 3 is communicated with the second pipe section.
Example 3
As shown in fig. 3, the decoking system of the ethylene cracking furnace according to example 3 is different from that of example 1 in that:
in this embodiment, the number of the hearths 1, the decoking tanks 3 and the decoking valves 5 is two, and the radiation furnace tube of each hearth 1 is communicated with the inlet of one decoking tank 3 through one decoking valve 5.
Example 4
As shown in fig. 4, the utility model provides a decoking system of an ethylene cracking furnace, the ethylene cracking furnace comprises a furnace chamber 1, a radiation furnace tube arranged in the furnace chamber 1 and a plurality of decoking ports 2 arranged at two sides of the furnace chamber 1, the decoking system comprises at least one decoking tank 3 and a first decoking pipeline 4;
the coke cleaning tank 3 is arranged between the outlet of the radiation furnace tube and the coke burning port 2 and is used for cleaning coke burning gas;
the first decoking pipeline 4 is connected between the decoking tank 3 and the coking port 2, and the first decoking pipeline 4 is arranged on two sides of the hearth 1.
In the embodiment, a coke cleaning valve 5 is arranged between the outlet of the radiation furnace tube and the inlet of the coke cleaning tank 3.
In this embodiment, the decoking system further includes a third pipe section and a fourth pipe section which are disposed at two sides of the furnace 1 and respectively connected to the outlets of the decoking valves 5, a plurality of decoking tanks 3 are provided, a plurality of first decoking pipelines 4 are provided, the plurality of decoking tanks 3 are respectively disposed at two sides of the furnace 1, and each of the decoking ports 2 is communicated with the outlet of one of the decoking tanks 3 through one of the first decoking pipelines 4;
the inlet of the decoking tank 3 arranged on one side of the hearth 1 is communicated with the third pipe section, and the inlet of the decoking tank 3 arranged on the other side of the hearth 1 is communicated with the fourth pipe section.
Example 5
As shown in fig. 5, the decoking system of the ethylene cracking furnace according to example 5 is different from that of example 4 in that:
in this embodiment, the number of the hearths 1 and the decoking valves 5 is two, the radiation furnace tube in each hearth 1 is connected to the inlet of one decoking valve 5, and the outlet of each decoking valve 5 is communicated with the third tube segment and the fourth tube segment at the two sides of the hearth 1 communicated with the inlet thereof.
Example 6
As shown in fig. 6, the decoking system of the ethylene cracking furnace according to example 6 is different from that of example 4 in that:
in this embodiment, the number of the hearths 1 and the decoking valves 5 is two, the radiation furnace tube in each hearth 1 is connected to the inlet of one decoking valve 5, and the outlet of each decoking valve 5 is communicated with the third tube segment and the fourth tube segment at the two sides of the hearth 1 communicated with the inlet thereof.
In this embodiment, the decoking system further comprises a third decoking pipeline 7, the third and fourth pipe sections on both sides of each furnace 1 are connected to one end of the third decoking pipeline 7, and the outlet of each decoking valve 5 is connected to the other end of the third decoking pipeline 7.
Example 7
As shown in fig. 7, the decoking system of the ethylene cracking furnace according to example 7 is different from that of example 1 in that:
in this embodiment, the second decoking pipelines 6 disposed at two sides of the furnace 1 are divided into a plurality of groups of pipeline units, each group of pipeline units includes a plurality of second decoking pipelines 6, the first decoking pipeline 4 includes a first pipe section and a second pipe section respectively disposed at two sides of the furnace 1, the plurality of groups of pipeline units disposed at one side of the furnace 1 are connected in parallel with the first pipe section through the branch 8, and the plurality of groups of pipeline units disposed at the other side of the furnace 1 are connected in parallel with the second pipe section through the branch 8. The coke-burning gas after coke cleaning of the coke cleaning tank 3 is output to the first coke cleaning pipeline 4, enters each group of pipeline units in a grading way, and is conveyed into the coke-burning opening 2 through each second coke cleaning pipeline 6.
The pipe diameter of the second decoking pipeline 6 far away from the connection part of the branch 8 and the first pipe section or the second pipe section is larger than that of the second decoking pipeline 6 close to the connection part of the branch 8 and the first pipe section or the second pipe section.
The first pipe section or the second pipe section is connected to the middle of the branch 8, and the pipe diameter of the second coke cleaning pipeline 6 close to the two ends of the branch 8 is larger than that of the second coke cleaning pipeline 6 close to the connection part of the branch 8 and the first pipe section or the second pipe section.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (12)
1. The ethylene cracking furnace decoking system comprises a hearth (1), a radiation furnace tube and a plurality of decoking openings (2) arranged on two sides of the bottom of the hearth (1), wherein the radiation furnace tube is communicated with the hearth (1), and is characterized by comprising at least one decoking tank (3) and a first decoking pipeline (4);
the coke cleaning tank (3) is arranged between the outlet of the radiation furnace tube and the coking opening (2) and is used for removing coke particles in the coking gas;
the first decoking pipeline (4) is connected between the decoking tank (3) and the coking opening (2), and the first decoking pipeline (4) is arranged on two sides of the hearth (1).
2. The ethylene cracking furnace decoking system of claim 1, wherein a decoking valve (5) is arranged between the outlet of the radiation furnace tube and the inlet of the decoking tank (3).
3. The ethylene cracking furnace decoking system according to claim 2, further comprising a plurality of second decoking lines (6), wherein each of the decoking ports (2) is communicated with the first decoking line (4) through one of the second decoking lines (6).
4. The ethylene cracking furnace decoking system according to claim 3, wherein the plurality of second decoking pipelines (6) are respectively arranged on two sides of the furnace (1), the first decoking pipeline (4) comprises a first pipe section and a second pipe section which are respectively arranged on two sides of the furnace, the second decoking pipelines (6) arranged on one side of the furnace (1) are connected to the first pipe section, and the second decoking pipelines (6) arranged on the other side of the furnace (1) are connected to the second pipe section.
5. The ethylene cracking furnace decoking system of claim 4, wherein the decoking tank (3) is one, and the first pipe section and the second pipe section are both connected to the outlet of the decoking tank (3).
6. The ethylene cracking furnace decoking system according to claim 4, wherein the number of the decoking tanks (3) is two, and the inlet of each decoking tank (3) is connected to the decoking valve (5); the outlet of one coke cleaning tank (3) is communicated with the first pipe section, and the outlet of the other coke cleaning tank (3) is communicated with the second pipe section.
7. The ethylene cracking furnace decoking system according to claim 4, wherein the number of the hearths (1), the decoking tanks (3) and the decoking valves (5) is two, and the radiant furnace tubes in each hearth (1) are communicated with the inlet of one decoking tank (3) through one decoking valve (5).
8. The ethylene cracking furnace decoking system of claim 2, further comprising a third pipe section and a fourth pipe section which are located at two sides of the furnace (1) and respectively connected to the outlet of the decoking valve (5), wherein the number of the decoking tanks (3) is multiple, the number of the first decoking pipelines (4) is multiple, the number of the decoking tanks (3) is respectively arranged at two sides of the furnace (1), and each decoking port (2) is communicated with the outlet of one decoking tank (3) through one first decoking pipeline (4);
the inlet of the coke cleaning tank (3) positioned on one side of the hearth (1) is communicated with the third pipe section, and the inlet of the coke cleaning tank (3) positioned on the other side of the hearth (1) is communicated with the fourth pipe section.
9. The ethylene cracking furnace decoking system according to claim 8, characterized in that the furnace (1) and the decoking valve (5) are two, and the radiant furnace tubes in each furnace (1) are connected to the inlet of one decoking valve (5).
10. The ethylene cracking furnace decoking system according to claim 9, further comprising a third decoking line (7), wherein the third tube section and the fourth tube section on both sides of each furnace (1) are connected to one end of the third decoking line (7), and the outlet of each decoking valve (5) is connected to the other end of the third decoking line (7).
11. The ethylene cracking furnace decoking system according to claim 5, wherein the second decoking pipeline (6) is divided into a plurality of groups of pipeline units, each group of pipeline units comprises a plurality of second decoking pipelines (6), the plurality of groups of pipeline units arranged on one side of the furnace (1) are connected in parallel with the first pipe section through a branch (8), and the plurality of groups of pipeline units arranged on the other side of the furnace are connected in parallel with the second pipe section through the branch (8).
12. The ethylene cracking furnace decoking system according to claim 11, wherein the pipe diameter of the second decoking line (6) remote from the junction of the branch (8) and the first pipe section or the second pipe section is larger than the pipe diameter of the second decoking line (6) close to the junction of the branch (8) and the first pipe section or the second pipe section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921422407.8U CN211170596U (en) | 2019-08-29 | 2019-08-29 | Decoking system of ethylene cracking furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921422407.8U CN211170596U (en) | 2019-08-29 | 2019-08-29 | Decoking system of ethylene cracking furnace |
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| CN211170596U true CN211170596U (en) | 2020-08-04 |
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| CN201921422407.8U Active CN211170596U (en) | 2019-08-29 | 2019-08-29 | Decoking system of ethylene cracking furnace |
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2019
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