CN216868508U

CN216868508U - Torch combustion system

Info

Publication number: CN216868508U
Application number: CN202220324793.2U
Authority: CN
Inventors: 刘继思; 林思维; 杨瑞
Original assignee: Guizhou Wisdom Energy Technology Co ltd
Current assignee: Guizhou Wisdom Energy Technology Co ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-07-01
Anticipated expiration: 2032-02-17

Abstract

A flare combustion system comprises an air discharge pipeline and a control module connected with the air discharge pipeline, wherein the air discharge pipeline comprises a main pipeline and a plurality of branches connected with the main pipeline, the control module comprises a main pipeline control unit arranged on the main pipeline, the main pipeline control unit comprises a first pressure reducing valve, a second pressure reducing valve, a first pressure sensor, a second pressure sensor, a third pressure sensor and a controller, the first pressure reducing valve and the second pressure reducing valve are sequentially connected in series on the main pipeline, the first pressure sensor is arranged at the front end of the first pressure reducing valve, the second pressure sensor is arranged between the first pressure reducing valve and the second pressure reducing valve, the third pressure sensor is arranged at the rear end of the second pressure reducing valve, the second pressure sensor is connected with the first pressure reducing valve in a feedback mode through the controller, the flare combustion system can effectively regulate and control the pressure of flare gas through the arrangement of the plurality of pressure reducing valves and the configuration of the plurality of pressure sensors, ensuring the combustion purification effect.

Description

Torch combustion system

Technical Field

The utility model relates to the technical field of burners, in particular to a torch combustion system.

Background

The flare combustion system is one of the important safety measures for chemical, oil refining, ethylene, LNG (liquefied natural gas) and other enterprises in engineering operation, and is mainly used for hydrocarbon flare gas (usually containing H) discharged from each equipment under start-up and shut-down and abnormal working conditions₂S, etc.) to convert the flare gas into a product which does not damage the environment and then discharge the product into the environment, thereby reducing the pollution to the environment.

Along with the development of large-scale refining equipment, the discharged flare gas is also increased greatly, and therefore, the safety problem of the gas discharge pipeline of the flare gas is more and more serious. However, the existing flare combustion system has simple gas discharge pipeline structure, mostly only one-stage pressure regulation, which is not only unfavorable for pressure regulation and control and difficult to ensure the pipeline safety, but also causes the conditions of insufficient flare gas combustion, black smoke emission and the like, and is difficult to achieve ideal combustion purification effect.

Disclosure of Invention

In view of this, a flare combustion system capable of effectively performing pressure-stabilizing regulation and control and ensuring a combustion effect is provided.

The utility model provides a torch combustion system, including the bleeder line and with the control module that the bleeder line is connected, the bleeder line include the main line and with a plurality of branches that the main line is connected, control module including set up in main road control unit on the main line, main road control unit including the order concatenate in first relief pressure valve and second relief pressure valve on the main line, set up in the first pressure sensor of first relief pressure valve front end, set up in second pressure sensor between first relief pressure valve and the second relief pressure valve, set up in the third pressure sensor and the controller of second relief pressure valve rear end, second pressure sensor passes through the controller with first relief pressure valve feedback connection.

Further, the first pressure reducing valve is an electric pressure reducing valve, and the second pressure reducing valve is a mechanical pressure reducing valve.

Furthermore, the control module further comprises a branch control unit arranged on each branch, and the branch control unit comprises a branch pressure reducing valve connected in series on the branch, a branch pressure sensor arranged at the rear end of the branch pressure reducing valve, and a controller connected with the branch pressure sensor and the branch pressure reducing valve in a feedback manner.

Further, the device also comprises a plurality of stages of combustion units, wherein each stage of combustion unit comprises an incandescent lamp, an igniter and a plurality of burners, and the number of the burners of the multi-stage combustion unit is gradually increased.

Furthermore, the control module further comprises a temperature control unit, the temperature control unit comprises a temperature sensor arranged corresponding to the beacon light, and the temperature sensor is connected with the igniter through a controller.

Further, the control module further comprises a PLC, and the temperature sensor, the first pressure sensor and the second pressure sensor are all connected with the PLC.

Further, the number of branches is greater than the number of stages of the combustion unit.

Furthermore, the branch road includes the pilot burner branch road and a plurality of combustor branch road that set up in parallel, the pilot burner includes a plurality of second grade branch roads that set up in parallel, each the combustor branch road corresponds one of them level the combustor setting of combustion unit, each second grade branch road corresponds one of them level the pilot burner setting of combustion unit.

Furthermore, a main valve is arranged at the front end of the main pipeline, a pressure relief pipeline is connected between the main valve and the first pressure sensor, and a safety action valve is arranged on the pressure relief pipeline.

Further, a flame arrester is further arranged on the pressure relief pipeline and is located at the rear end of the safety action valve.

Compared with the prior art, the flare combustion system is provided with the plurality of pressure reducing valves on the main pipeline, so that the pressure of flare gas can be gradually reduced, the proper pressure of the flare gas entering each branch is ensured, and the pressure reducing valves are also arranged on each branch for pressure regulation, so that the flow of the flare gas finally conveyed to the combustor is stable and the pressure is proper; the temperature control unit is arranged on the combustion unit to ensure that the pilot burner is in an ignition state, so that each combustor can quickly form continuous flame, torch gas is fully combusted to remove harmful substances in the torch gas, and the environment is prevented from being polluted.

Drawings

FIG. 1 is a block diagram of an embodiment of a flare combustion system of the present invention.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. One or more embodiments of the present invention are illustrated in the accompanying drawings to provide a more accurate and thorough understanding of the disclosed embodiments. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein.

The same or similar reference numbers in the drawings correspond to the same or similar parts; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

The utility model provides a flare combustion system which is used for combustion purification treatment of flare gas. Fig. 1 shows an embodiment of the present invention, in which the flare combustion system includes an air bleed line 10, multiple stages of combustion units 20, and a control module, the flare gas is fed into each stage of combustion unit 20 through the air bleed line 10 for combustion, and the control module controls the operation of each stage of combustion unit 20 according to the flow rate, pressure, etc. of the flare gas in the air bleed line 10.

In the embodiment shown in FIG. 1, the flare combustion system includes a two-stage combustion unit 20, namely a primary combustion unit 20a and a secondary combustion unit 20 b. Each stage of the

combustion units

20a, 20b includes at least one pilot burner 22 and a plurality of burners 24, and the pilot burner 22 ignites the burner 24 adjacent thereto, and the burners 24 re-ignites the other burners 24 adjacent thereto, so that all the burners 24 of the

combustion units

20a, 20b can be ignited to form flame-holding. Preferably, the number of burners 24 in each stage of the

combustion unit

20a, 20b is increased in stages, and the amount of flare gas that can be handled is increased in stages. In the illustrated embodiment, the number of burners 24 of the primary combustion unit 20a is less than the number of burners 24 of the secondary combustion unit 20b, i.e., the primary combustion unit 20a can process a smaller amount of air than the secondary combustion unit 20 b. It should be understood that in some embodiments, the flare combustion system of the present invention may include three, four, or even more stages of combustion units 20, depending on the amount of flare gas discharged, and is not limited to the illustrated embodiments.

The number and arrangement of the incandescent lamps 22 of each stage of the

combustion units

20a, 20b may be different according to the number and arrangement of the burners 24 of each stage of the

combustion units

20a, 20b, and in the figure, the number of the incandescent lamps 22 of the first stage combustion unit 20a is 2, and the number of the incandescent lamps 22 of the second stage combustion unit 20b is 3. The beacon lights 22 are preferably distributed between or outside the burners 24 so that all the burners 24 can be ignited quickly. An igniter 26 is disposed above each of the lanterns 22, and the igniter 26 is connected to a temperature control unit 30 of the control module so that the lantern 22 can be maintained in an ignition state. The temperature control unit 30 includes a temperature sensor 32, and the temperature sensor 32 is connected to the igniter 26 through a controller 34. The temperature sensor 32 detects the temperature of the pilot burner 22, the controller 34 determines whether the pilot burner 22 is in an ignition state according to the temperature detected by the temperature sensor 32, when the temperature is lower than a predetermined value, which indicates that the pilot burner 22 is not ignited or is accidentally extinguished after being ignited, the controller 34 generates a signal to start the igniter 26 to ignite until the pilot burner 22 is ignited to increase the temperature to the predetermined value.

The gas discharge pipeline 10 comprises a main pipeline 12 and a plurality of branches 14 connected with the main pipeline 12, wherein the front end of the main pipeline 12 is connected with a flare gas discharge device through a main valve 40; the plurality of branches 14 are arranged in parallel, specifically including one pilot branch 14a and a plurality of burner branches 14b, wherein the pilot branch 14a delivers flare gas to each pilot 22 and each burner branch 14b delivers flare gas to the burner 24 of each stage of the combustion unit 20. The number of the burner branches 14b is the same as the number of the stages of the combustion units 20, and each burner branch 14b is arranged corresponding to one stage of the combustion units 20. Preferably, the burners 24 are of an injection type, and a nozzle is disposed at the end of the burner branch 14b at a position corresponding to each burner 24 to inject the flare gas into the corresponding burner 24 at a high speed for combustion. Preferably, the pilot burner branch 14a includes a plurality of secondary branches 140 arranged in parallel, the number of the secondary branches 140 is the same as the number of the stages of the combustion units 20, and the end of each secondary branch 140 is connected to each pilot burner 22 of the corresponding one of the combustion units 20.

The control module further includes a main circuit control unit 50, the main circuit control unit 50 including a first pressure reducing valve 51, a second pressure reducing valve 52, a first pressure sensor 53, a second pressure sensor 54, a third pressure sensor 55, and a controller 56.

The first and second

pressure reducing valves

51, 52 are connected in series to the main conduit 12 in series, so that the pressure of the flare gas may be gradually reduced during the flow along the main conduit 12, and may be reduced to a reasonable range before entering each branch 14. Preferably, the first pressure reducing valve 51 is an electric pressure reducing valve, the second pressure reducing valve 52 is a mechanical pressure reducing valve, and the first pressure reducing valve 51 is located at a front end of the second pressure reducing valve 52. A first pressure sensor 53 disposed between the main valve 40 and the first pressure reducing valve 51, for detecting the incoming pressure of the main line 12; a second pressure sensor 54 is provided between the first pressure reducing valve 51 and the second pressure reducing valve 52, and detects the pressure of the main line 12 after the pressure reduction by the first pressure reducing valve 51; a third pressure sensor 55 is provided downstream of the second pressure reducing valve 52 for detecting the pressure of the main line 12 after the pressure reduction action by the second pressure reducing valve 52. The controller 56 is electrically connected to the second pressure sensor 54, and controls the opening degree of the first pressure reducing valve 51 according to the pressure data fed back by the controller.

The main valve 40, which may be either an electrically or manually operated valve, is normally held closed and is opened to communicate with the main conduit 12 of the bleed line 10 when the apparatus is discharging flare gas. The controller 34 determines whether the incoming pressure (i.e., the pressure of the flare gas fed into the main pipe 12) is within a safe range based on the pressure data detected by the first pressure sensor 53, and sends an alarm to the system if the incoming pressure is outside the safe range, and activates the first pressure reducing valve 51 if the incoming pressure is within the safe range. Preferably, the main line 12 is further connected with a pressure relief line 16 between the main valve 40 and the first pressure sensor 53, and the pressure relief line 16 is provided with a safety actuation valve 42. When the incoming material pressure exceeds the safety range, the safety action valve 42 is opened to release partial pressure outwards, and the pressure before the first pressure sensor 53 is ensured to be in the safety range. In the illustrated embodiment, a flame arrester 44 is further disposed on the pressure relief pipeline 16, and the flame arrester 44 can prevent backfire, block flame from spreading into the main pipeline 12, and ensure system safety.

The second pressure sensor 54 and the first pressure reducing valve 51 form feedback control by the controller 34, and when the pressure data detected by the second pressure sensor 54 is large, the opening degree of the first pressure reducing valve 51 is appropriately reduced, and the flow rate of the flare gas flowing to the second pressure reducing valve 52 is reduced; conversely, when the pressure data detected by the second pressure sensor 54 is small, the opening degree of the first pressure reducing valve 51 is appropriately increased, and the flow rate of the flare gas flowing to the second pressure reducing valve 52 is increased. The opening degree of the first pressure reducing valve 51 is adjusted so that the pressure of the flare gas flowing to the second pressure reducing valve 52 is maintained within an appropriate range, and the pre-valve pressure of the second pressure reducing valve 52 is ensured to be within a safe range. In addition, the difference between the pressure data detected by the third pressure sensor 55 and the pressure data detected by the second pressure sensor 54 can be compared to determine whether the second pressure reducing valve 52 is operating normally. The third pressure sensor 55 may be interlocked with the first pressure reducing valve 51 to adjust the pressure at the rear end of the second pressure reducing valve 52.

The control module further comprises branch control units 60 disposed on each branch 14, each branch control unit 60 comprising a branch pressure reducing valve 62, preferably an electric pressure reducing valve, a branch pressure sensor 64, and a controller 66, wherein the branch pressure sensor 64 is disposed at a rear end of the branch pressure reducing valve 62 and forms a feedback connection with the branch pressure reducing valve 62 through the controller 66. When the pressure data detected by the branch pressure sensor 64 is large, the opening degree of the branch pressure reducing valve 62 is appropriately reduced to reduce the pressure of the flare gas flowing to the burner 24/pilot lamp 22; conversely, when the pressure data detected by the branch pressure sensor 64 is small, the opening degree of the branch pressure reducing valve 62 is appropriately increased to increase the flow rate of the flare gas flowing to the burner 24/pilot lamp 22. Because the number of the burners 24 of each stage of the combustion unit 20 is different and the amount of gas that can be processed is different, the reference pressure value of each branch control unit 60 can be different and the opening degree of the branch pressure reducing valve 62 can be different, usually the opening degree of the branch pressure reducing valve 62 is gradually increased along with the combustion unit 20, so that the amount of gas distributed by each stage of the combustion unit 20 can be adapted to the number of the burners 24, and the flare gas can be fully combusted.

The main circuit control unit 50, the branch circuit control unit 60, and the temperature control unit 30 may be linked by a PLC 57, and for example, the first pressure sensor 53, the third pressure sensor 55, the branch circuit pressure sensor 64, and the temperature sensor 32 are all electrically connected to the PLC 57, and the branch circuit pressure reducing valve 62 of each branch circuit 14 and the igniter 26 of each stage of the combustion unit 20 are activated according to the pressure of the main circuit 12. Specifically, when the pressure of the main pipeline 12, such as the pressure fed back by the third pressure sensor 55, is less than a certain value, only the first-stage combustion unit 20a is started, at this time, the branch pressure reducing valve 62 on the pilot branch 14a is started, and the igniter 26 of the first-stage combustion unit 20a and the branch pressure reducing valve 62 on the corresponding burner branch 14b are started; when the pressure in the main conduit 12 exceeds a certain value, the two-

stage combustion units

20a, 20b can be simultaneously started, at this time, the branch pressure reducing valve 62 on the pilot burner branch 14a is started, the igniters 26 of the two-

stage combustion units

20a, 20b and the branch pressure reducing valves 62 on the two burner branches 14b are both started, and the capacity of treating the flare gas is multiplied.

In the above embodiment, the

control units

50 and 60 are disposed on the main pipeline 12 and the branches 14 to adjust the pressure/flow rate of the flare gas in the pipelines, so that the pressure of the main pipeline 12 and each branch 14 is maintained in a proper state, and particularly, the flare gas pressure of the main pipeline 12 is gradually decreased to stabilize the flow rate and make the pressure proper; in addition, the activation of each branch pressure reducing valve 62 is controlled according to the pressure of the main pipeline 12, so that the number of the actually ignited stages of the combustion unit 20 can be increased or decreased along with the amount of the gas to be treated, the sufficient combustion of the flare gas is ensured, and the combustion and purification effect of the flare gas is ensured. In addition, during the combustion of the flare gas, the pilot lamp 22 is always in an ignition state through the temperature control unit 30, so that the burners 24 can be quickly ignited to form a flame. It should be understood that the

individual controllers

34, 56, 66 and the PLC 57 of the control module may be separate components or integrated on a single chip, and that the electrical connections of the flare combustion system of the present invention are shown in phantom for ease of understanding and are not representative of actual construction.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and other changes and modifications can be made by those skilled in the art according to the spirit of the present invention, and these changes and modifications made according to the spirit of the present invention should be included in the scope of the present invention as claimed.

Claims

1. The utility model provides a torch combustion system, including the bleeder line and with the control module that the bleeder line is connected, the bleeder line include the main line and with a plurality of branches that the main line is connected, its characterized in that, control module including set up in main road control unit on the main line, main road control unit including the order concatenate in first relief pressure valve and second relief pressure valve on the main line, set up in the first pressure sensor of first relief pressure valve front end, set up in second pressure sensor between first relief pressure valve and the second relief pressure valve, set up in the third pressure sensor and the controller of second relief pressure valve rear end, the second pressure sensor pass through the controller with first relief pressure valve feedback connection.

2. The flare combustion system of claim 1, wherein the first pressure relief valve is an electrically operated pressure relief valve and the second pressure relief valve is a mechanical pressure relief valve.

3. The flare combustion system of claim 1, wherein the control module further comprises a branch control unit disposed on each of the branches, the branch control unit comprising a branch pressure reducing valve connected in series on the branch, a branch pressure sensor disposed at a rear end of the branch pressure reducing valve, and a controller feedback connecting the branch pressure sensor and the branch pressure reducing valve.

4. The flare combustion system of claim 1, further comprising a plurality of stages of combustion units, each stage of the combustion unit comprising an incandescent lamp, an igniter disposed corresponding to the incandescent lamp, and a plurality of burners, the number of burners of the plurality of stages of combustion units increasing in stages.

5. The torch combustion system of claim 4, wherein the control module further comprises a temperature control unit comprising a temperature sensor disposed in correspondence with the beacon, the temperature sensor being connected to the igniter via a controller.

6. The flare combustion system of claim 5, wherein the control module further comprises a PLC, the temperature sensor, the first pressure sensor, and the second pressure sensor all connected to the PLC.

7. A flare combustion system as in claim 4, wherein the number of branches is greater than the number of stages of the combustion unit.

8. The flare combustion system of claim 4, wherein the branches comprise an incandescence lamp branch and a plurality of burner branches arranged in parallel, the incandescence lamp comprising a plurality of secondary branches arranged in parallel, each burner branch corresponding to a burner arrangement of one of the stages of the combustion unit, each secondary branch corresponding to an incandescence lamp arrangement of one of the stages of the combustion unit.

9. The flare combustion system of any one of claims 1 to 8, wherein a main valve is disposed at a front end of the main pipeline, a pressure relief pipeline is connected to the main pipeline between the main valve and the first pressure sensor, and a safety action valve is disposed on the pressure relief pipeline.

10. A flare combustion system as in claim 9, wherein the pressure relief line is further provided with a flame arrestor located at a rear end of the safety action valve.