Fuel gas supply pipeline system on oil-gas dual-fuel burner

Abstract

The fuel gas supply pipeline system comprises a fuel gas conveying pipe arranged in a valve group box body, a box body fuel gas inlet pipe and a box body fuel gas outlet pipe are arranged on the valve group box body, the input end of the fuel gas conveying pipe is arranged in the box body fuel gas inlet pipe in a penetrating mode and connected with a fuel gas source, and the output end of the fuel gas conveying pipe is connected with the fuel gas source. The output end of the fuel gas conveying pipe is arranged in the fuel gas outlet pipe of the box body in a penetrating mode and connected with the combustor, a pressure regulating valve and a flow regulating valve are arranged on the fuel gas conveying pipe, and a first fuel gas control valve and a second fuel gas control valve are arranged on the fuel gas conveying pipe between the pressure regulating valve and the flow regulating valve. A first pressure detection element is arranged between the first gas control valve and the second gas control valve, and a first emptying pipe is connected to the gas conveying pipe between the first gas control valve and the second gas control valve; and the first nitrogen conveying pipe in the valve group box body is connected to the fuel gas conveying pipe between the flow regulating valve and the second fuel gas control valve. The method has the advantage that the stability and the safety are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas dual-fuel burners, and in particular to a fuel gas supply pipeline system on an oil and gas dual-fuel burner. Background Art

[0002] In order to save energy, reduce emissions and pollution, marine boilers are increasingly using dual-fuel burners that are compatible with oil and gas. Oil and gas can meet the emission regulations of different sea areas.

[0003] At present, oil and gas compatible dual-fuel burners have a technical problem of easy leakage of gas input, so it is extremely important to prevent leakage of the gas input control system of the dual-fuel burner. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a gas supply pipeline system on an oil and gas dual-fuel burner, which has a simple structure and greatly improved safety.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a gas supply pipeline system on an oil and gas dual-fuel burner, comprising: a gas delivery pipe, the gas delivery pipe is arranged in a valve group box, a box gas inlet pipe and a box gas outlet pipe connected to the interior of the valve group box are arranged on the outer wall of the valve group box, the input end of the gas delivery pipe is penetrated in the box gas inlet pipe and connected to the gas source, the output end of the gas delivery pipe is penetrated in the box gas outlet pipe and connected to the burner, a pressure regulating valve and a flow regulating valve are sequentially arranged on the gas delivery pipe in the valve group box from the input end to the output end, a first gas control valve and a second gas control valve are arranged on the gas delivery pipe between the pressure regulating valve and the flow regulating valve, a first pressure detecting element is arranged between the first gas control valve and the second gas control valve, and a first exhaust pipe with a first exhaust control valve is connected to the gas delivery pipe between the first gas control valve and the second gas control valve; A first nitrogen delivery pipe with a first check valve and a first nitrogen delivery control valve is also provided in the valve group box, the output end of the first nitrogen delivery pipe is connected to the gas delivery pipe between the flow regulating valve and the second gas control valve, the input end of the first nitrogen delivery pipe passes through the valve group box and is connected to the nitrogen source, the first check valve is provided in the valve group box near the input end of the first nitrogen delivery pipe, and the first nitrogen delivery pipe between the first check valve and the first nitrogen delivery control valve is connected to a first release pipe with a first release control valve; A second relief pipe with a second relief control valve is arranged on the gas delivery pipe between the pressure regulating valve and the first gas control valve; the output ends of the first relief pipe and the second relief pipe are both connected to the first exhaust pipe, and the output end of the first exhaust pipe extends out of the valve group box.

[0006] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, the valve group box body includes a valve group box body and a valve group box upper cover, the valve group box upper cover sealing cover is arranged on the valve group box body, and the valve group box upper cover can be flipped and arranged on the valve group box body, the pipelines in the valve group box body are all arranged in the valve group box body, and a support seat is arranged at the bottom of the valve group box body.

[0007] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, a first nitrogen delivery pipe between the first check valve and the first nitrogen delivery control valve is also provided with a first nitrogen delivery safety control valve, and the first vent pipe is connected to the first nitrogen delivery pipe between the first nitrogen delivery safety control valve and the first nitrogen delivery control valve.

[0008] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, a nitrogen purge pipe with a second check valve is also provided in the valve group box, the input end of the nitrogen purge pipe extends out of the valve group box and is connected to the nitrogen source, a gas manual control valve is provided at the input end of the gas delivery pipe at the front end of the pressure regulating valve in the valve group box, and the output end of the nitrogen purge pipe is connected to the gas delivery pipe between the gas manual control valve and the pressure regulating valve; a manual nitrogen purge control valve is provided at the input end of the nitrogen purge pipe outside the valve group box.

[0009] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, the box gas outlet pipe extends all the way to be connected to the shell of the burner.

[0010] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, a draft fan is provided on the valve group box for conveying the gas inside the valve group box to the outside, and a plurality of air input components are arranged on the valve group box, each air input component comprises an air input pipe connected to the valve group box, a fireproof filter, an air orifice plate and an air check valve are sequentially provided on the air input pipe along the air input direction, and an air pressure switch is also provided on the air input pipe for monitoring the pressure in the air delivery pipe at both ends of the air orifice plate.

[0011] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, an air input assembly is provided on the valve group box, and an air input assembly is provided on the box gas inlet pipe and the box gas outlet pipe close to the burner.

[0012] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, a gas composition detector for detecting the gas composition in the valve group box is provided in the valve group box at the induced draft fan position.

[0013] Furthermore, in the aforementioned gas supply pipeline system on the oil and gas dual-fuel burner, a manual first nitrogen input control valve is provided at the input end of the first nitrogen delivery pipe outside the valve group box.

[0014] The advantages of the present invention are as follows: 1. All pipelines and valves thereon are arranged in the valve group box body, and once a leak occurs, the gas leakage and diffusion can be effectively avoided. 2. A first gas control valve and a second gas control valve are arranged on the gas delivery pipeline, and a first pressure detection element is arranged between the two, and a first exhaust pipe with a first exhaust control valve is connected to the gas delivery pipe between the first gas control valve and the second gas control valve. Therefore, each time the burner is started and gas needs to be supplied, the first gas control valve and the second gas control valve can be detected for leakage, and the gas can be stably delivered after ensuring that there is no leakage, which greatly improves the safety of the gas supply. 3. The arrangement of the induced draft fan and the air input assembly on the valve group box body can ensure that the gas concentration in the valve group box body is greatly reduced, and hidden dangers are prevented from occurring, thereby greatly improving the safety of the gas supply pipeline system on the entire oil and gas dual fuel burner. Once a gas leak occurs, the gas component detector will detect the gas in the gas component, thereby timely feeding back the detection signal and issuing a gas leak alarm, which further greatly improves the safety of the gas supply pipeline system on the entire oil and gas dual fuel burner. 4. The gas supply is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the principle structure of the gas supply pipeline system on the oil and gas dual-fuel burner described in the present invention.

[0016] Figure 2 It is a structural schematic diagram of a valve group box in a gas supply pipeline system on an oil and gas dual-fuel burner according to the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0018] like Figure 1 , Figure 2As shown, the gas supply pipeline system on the oil and gas dual fuel burner includes: a gas delivery pipe 1, and the gas delivery pipe 1 is arranged in the valve group box 2. In order to facilitate maintenance, installation and inspection, the valve group box 2 in this embodiment includes a valve group box body 201 and a valve group box upper cover 202, the valve group box upper cover 202 is sealed and arranged on the valve group box body 201, and the valve group box upper cover 202 can be turned over and arranged on the valve group box body 201, and the pipelines in the valve group box 2 are all arranged in the valve group box body 201, and a support seat 203 is arranged at the bottom of the valve group box body 201. The arrangement of the support seat 203 facilitates installation and connection. The outer wall of the valve group box 2 is provided with a box gas inlet pipe 21 and a box gas outlet pipe 22 connected to the inside thereof, the input end of the gas delivery pipe 1 is arranged in the box gas inlet pipe 21 and connected to the gas source, and the output end of the gas delivery pipe 1 is arranged in the box gas outlet pipe 22 and connected to the burner 3. For safety reasons, the box gas outlet pipe 22 is extended and connected to the shell of the burner 3 .

[0019] The purpose of arranging the gas input pipeline system in the valve block box 2 is that once a gas leakage occurs, the valve block box 2 can become a good barrier to prevent the gas from further spreading and causing great safety hazards. Therefore, arranging the gas input pipeline system in the valve block box 2 greatly improves the safety of the gas input pipeline system.

[0020] A pressure regulating valve 11 and a flow regulating valve 12 are sequentially arranged on the gas delivery pipe 1 in the valve group box 2 from the input end to the output end. A first gas control valve 13 and a second gas control valve 14 are arranged on the gas delivery pipe 1 between the pressure regulating valve 11 and the flow regulating valve 12. A first pressure detection element 15 is arranged between the first gas control valve 13 and the second gas control valve 14. The first pressure detection element 15 described in this embodiment adopts a leak detection pressure switch 15. A first exhaust pipe 16 with a first exhaust control valve 161 is connected to the gas delivery pipe 1 between the first gas control valve 13 and the second gas control valve 14.

[0021] A first nitrogen delivery pipe 4 with a first check valve 43 and a first nitrogen delivery control valve 41 is also provided in the valve group housing 2, and the output end of the first nitrogen delivery pipe 4 is connected to the gas delivery pipe 1 between the flow regulating valve 12 and the second gas control valve 14. The input end of the first nitrogen delivery pipe 4 passes through the valve group housing 2 and is connected to the nitrogen source. A manual first nitrogen input control valve 45 is provided at the input end of the first nitrogen delivery pipe 4 outside the valve group housing 2. The setting of the manual first nitrogen input control valve 45 facilitates the control of the on-off of the first nitrogen delivery pipe 4. The first check valve 43 is provided in the valve group housing 2 near the input end of the first nitrogen delivery pipe 4, and a first release pipe 44 with a first release control valve 441 is connected to the first nitrogen delivery pipe 4 between the first check valve 43 and the first nitrogen delivery control valve 41. When nitrogen enters the first nitrogen delivery pipe 4, the first release control valve 441 can be opened to release the gas in the pipeline through the first release pipe 44, and then the first release control valve 441 is immediately closed. In order to discharge the gas in the pipeline first, a first nitrogen delivery safety control valve 42 can be further provided on the first nitrogen delivery pipe 4 between the first check valve 43 and the first nitrogen delivery control valve 41 for safety reasons, and the first release pipe 44 is connected to the first nitrogen delivery pipe 4 between the first nitrogen delivery safety control valve 42 and the first nitrogen delivery control valve 41.

[0022] A second relief pipe 17 with a second relief control valve 171 is provided on the gas delivery pipe 1 between the pressure regulating valve 11 and the first gas control valve 13. The output ends of the first relief pipe 44 and the second relief pipe 17 are both connected to the output end of the first exhaust pipe 16, and the output end of the first exhaust pipe 16 extends out of the valve group box 2.

[0023] In addition, a nitrogen purge pipe 5 with a second check valve is also provided in the valve group box 2, and the input end of the nitrogen purge pipe 5 extends out of the valve group box 1 and is connected to the nitrogen source. A gas manual control valve 18 is provided at the input end of the gas delivery pipe 1 at the front end of the pressure regulating valve 11 in the valve group box 2, and the output end of the nitrogen purge pipe 5 is connected to the gas delivery pipe 1 between the gas manual control valve 18 and the pressure regulating valve 11; a manual nitrogen purge control valve 52 is provided at the input end of the nitrogen purge pipe 5 outside the valve group box 2.

[0024] In order to further improve safety, the valve block box 2 is provided with an induced draft fan 6 for conveying the gas inside the valve block box 2 to the outside, and a plurality of air input components 7 are arranged on the valve block box 6. A gas composition detector 10 for detecting the gas composition in the valve block box 6 is provided in the valve block box 2 at the position of the induced draft fan 6. The gas composition detector 10 is arranged as close to the exhaust position as possible. For details, see Figure 1As shown, an air input assembly 7 is provided on the valve assembly box 2, and an air input assembly 7 is provided on the box gas inlet pipe 21 and the box gas outlet pipe 22 near the burner 3. Each air input assembly 7 includes an air input pipe 71 connected to the valve assembly box 2, and a fire filter 72, an air orifice plate 73 and an air check valve 74 are sequentially provided on the air input pipe 71 along the air input direction, and an air pressure switch 75 for monitoring the pressure in the air delivery pipe 71 at both ends of the air orifice plate 73 is also provided on the air input pipe 71. The purpose of setting the air pressure switch 75 is that once the fire filter 72 is blocked, the air pressure switch 75 is closed to send a signal that the fire filter 72 needs to be replaced in time, so that it can be ensured that the air input assembly 7 can always stably deliver air to the valve assembly box 2. The purpose of setting the induced draft fan 6 and the air input assembly 7 is to continuously introduce air into the valve assembly box 6 to dilute the concentration of the gas that may leak in the valve assembly box 2, and the diluted gas is continuously discharged through the induced draft fan 6. Fresh air is continuously added and then discharged, which can greatly dilute the gas concentration in the valve group box 2, avoiding the possibility of dangerous situations caused by excessive gas concentration in the valve group box 2 in the event of gas leakage.

[0025] The working principle is as follows: when gas supply is needed, the manual gas control valve 18 is opened, the first gas control valve 13 and the second gas control valve 14 are in a closed state, gas enters through the input end of the gas delivery pipe 1, and the second relief control valve 171 is opened to allow the gas in the gas delivery pipe 1 to be discharged through the second relief pipe 17, and then the relief control valve 171 is closed. Then the leak detection steps are carried out: 1. The first gas control valve 13 is opened, and the gas enters the gas delivery pipe 1 between the first gas control valve 13 and the second gas control valve 14. The leak detection pressure switch 15 shows that the pressure gradually rises. Then the first gas control valve 13 is closed to observe whether the pressure of the leak detection pressure switch 15 drops. If the pressure of the leak detection pressure switch 15 drops, it means that the second gas control valve 14 is leaking. If the pressure of the leak detection pressure switch 15 does not drop, it means that the second gas control valve 14 is normal; 2. Open the first exhaust control valve 161 to let the second exhaust control valve 161 open. The gas in the gas delivery pipe 1 between the first gas control valve 13 and the second gas control valve 14 is discharged to the outside through the first exhaust pipe 16, and at the same time the pressure of the leak detection pressure switch 15 is reduced, and the first exhaust control valve 161 is closed; third, when the first gas control valve 13 and the second gas control valve 14 are in the closed state, the change of the pressure of the leak detection pressure switch 15 is observed. In this state, if the pressure of the leak detection pressure switch 15 is found to rise, it means that the first gas control valve 13 is leaking. If the pressure of the leak detection pressure switch 15 remains unchanged, it means that the first gas control valve 13 is in a normal state.

[0026] After the leak detection is completed, the first gas control valve 13 and the second gas control valve 14 are opened, the pressure regulating valve 11 regulates the gas pressure, and the flow regulating valve 12 regulates the gas flow, after which the gas can be stably output to the burner.

[0027] After the furnace is shut down, the first gas control valve 13 and the second gas control valve 14 are closed. The manual first nitrogen input control valve 45 is normally open, the first nitrogen delivery safety control valve 42 is opened, and the nitrogen enters the burner 3 through the first nitrogen delivery control valve 41, the flow regulating valve 12, and the output end of the gas delivery pipe 1, thereby sending the residual gas in the pipeline into the burner for burning. After the nitrogen purge is completed, the first nitrogen delivery control valve 41 is closed. The residual gas between the first gas control valve 13 and the second gas control valve 14 is discharged to the outside through the first exhaust pipe 16 by opening the first exhaust control valve 161.

[0028] When the valve on the gas delivery pipe 1 needs to be replaced or repaired, the manual gas control valve 18 is closed, and the manual nitrogen purge control valve 52 is opened to purge the gas delivery pipe 1 with nitrogen to discharge the gas in the pipeline. If the pressure regulating valve 11 needs to be replaced, the manual nitrogen purge control valve 52 and the venting control valve 171 are opened to discharge the gas in the pipeline area where the pressure regulating valve 11 is located through the second venting pipe 17, and then the pressure regulating valve 11 is repaired or replaced.

[0029] Since the valve block box 6 is provided with an induced draft fan 6 and an air input assembly 7, the induced draft fan 6 continuously outputs the gas inside the valve block box 6 to the outside, so that a negative pressure is formed inside the valve block box 6, so that the air will continuously pass through the fireproof filter 72, the air orifice plate 73 and the air check valve 74 to enter the valve block box 6. Due to the setting of the air pressure switch 75, once a gas leakage failure occurs in the valve block box 6, the gas component detector 10 will detect the gas in the gas component, thereby timely feeding back the detection signal and issuing a gas leakage alarm. The induced draft fan 6 and the air input assembly 7 greatly improve the safety of the gas supply pipeline system on the entire oil and gas dual fuel burner. The setting of the gas component detector 10 further improves the safety.

[0030] As can be seen from the above, the gas supply pipeline system on the oil and gas dual fuel burner described in the present application has the following advantages: 1. All pipelines and valves thereon are arranged in the valve group box 2, and once a leak occurs, the gas leakage and diffusion can be effectively avoided. 2. A first gas control valve and a second gas control valve are arranged on the gas delivery pipeline, and a first pressure detection element is arranged between the two, and a first exhaust pipe with a first exhaust control valve is connected to the gas delivery pipe between the first gas control valve and the second gas control valve. Therefore, every time the burner is started and gas needs to be supplied, the first gas control valve and the second gas control valve can be checked for leakage to ensure that there is no leakage before the gas is stably delivered, which greatly improves the safety of the gas supply. 3. The arrangement of the induced draft fan 6 and the air input assembly 7 on the valve group box 2 can ensure that the gas concentration in the valve group box 2 is greatly reduced, prevent hidden dangers, and thus greatly improve the safety of the gas supply pipeline system on the entire oil and gas dual fuel burner. Once a gas leak occurs, the gas component detector 10 will detect the gas in the gas component, thereby timely feeding back the detection signal and issuing a gas leak alarm, which further greatly improves the safety of the gas supply pipeline system on the entire oil and gas dual fuel burner. 4. Stable gas supply.

Claims

1. The gas supply pipeline system on the oil and gas dual fuel burner includes: A gas delivery pipe, characterized in that: the gas delivery pipe is arranged in a valve group box, a box gas inlet pipe and a box gas outlet pipe connected to the inside of the valve group box are arranged on the outer wall of the valve group box, the input end of the gas delivery pipe is passed through the box gas inlet pipe and connected to the gas source, the output end of the gas delivery pipe is passed through the box gas outlet pipe and connected to the burner, a pressure regulating valve and a flow regulating valve are sequentially arranged on the gas delivery pipe in the valve group box from the input end to the output end, a first gas control valve and a second gas control valve are arranged on the gas delivery pipe between the pressure regulating valve and the flow regulating valve, a first pressure detecting element is arranged between the first gas control valve and the second gas control valve, and a first exhaust pipe with a first exhaust control valve is connected to the gas delivery pipe between the first gas control valve and the second gas control valve; A first nitrogen delivery pipe with a first check valve and a first nitrogen delivery control valve is also provided in the valve group box, the output end of the first nitrogen delivery pipe is connected to the gas delivery pipe between the flow regulating valve and the second gas control valve, the input end of the first nitrogen delivery pipe passes through the valve group box and is connected to the nitrogen source, the first check valve is provided in the valve group box near the input end of the first nitrogen delivery pipe, and the first nitrogen delivery pipe between the first check valve and the first nitrogen delivery control valve is connected to a first release pipe with a first release control valve; A second relief pipe with a second relief control valve is arranged on the gas delivery pipe between the pressure regulating valve and the first gas control valve; the output ends of the first relief pipe and the second relief pipe are both connected to the first exhaust pipe, and the output end of the first exhaust pipe extends out of the valve group box.

2. The gas supply pipeline system on the oil and gas dual fuel burner according to claim 1 is characterized in that: The valve assembly box includes a valve assembly box body and a valve assembly box upper cover. The valve assembly box upper cover is sealed on the valve assembly box body, and the valve assembly box upper cover can be flipped on the valve assembly box body. The pipelines in the valve assembly box are all arranged in the valve assembly box body, and a support seat is arranged at the bottom of the valve assembly box body.

3. The gas supply pipeline system on the oil and gas dual fuel burner according to claim 1 is characterized in that: A first nitrogen delivery safety control valve is also provided on the first nitrogen delivery pipe between the first check valve and the first nitrogen delivery control valve, and the first vent pipe is connected to the first nitrogen delivery pipe between the first nitrogen delivery safety control valve and the first nitrogen delivery control valve.

4. The gas supply pipeline system for the oil and gas dual fuel burner according to claim 1 is characterized in that: A nitrogen purge pipe with a second check valve is also provided in the valve group box, the input end of the nitrogen purge pipe extends out of the valve group box and is connected to the nitrogen source, a gas manual control valve is provided at the input end of the gas delivery pipe at the front end of the pressure regulating valve in the valve group box, and the output end of the nitrogen purge pipe is connected to the gas delivery pipe between the gas manual control valve and the pressure regulating valve; a manual nitrogen purge control valve is provided at the input end of the nitrogen purge pipe outside the valve group box.

5. The gas supply pipeline system for the oil and gas dual fuel burner according to claim 1 is characterized in that: The box gas outlet pipe extends all the way to be connected to the shell of the burner.

6. The gas supply pipeline system for the oil and gas dual fuel burner according to claim 5 is characterized in that: The valve assembly box is provided with an induced draft fan for conveying the gas inside the valve assembly box to the outside. The valve assembly box is arranged with a number of air input components, each of which includes an air input pipe connected to the valve assembly box. The air input pipe is provided with a fireproof filter, an air orifice plate and an air check valve in sequence along the air input direction. The air input pipe is also provided with an air pressure switch for monitoring the pressure in the air delivery pipe at both ends of the air orifice plate.

7. The gas supply pipeline system for the oil and gas dual fuel burner according to claim 5, characterized in that: An air input assembly is arranged on the valve group box body, and an air input assembly is arranged respectively on the box body gas inlet pipe and the box body gas outlet pipe close to the burner.

8. The gas supply pipeline system for the oil and gas dual fuel burner according to claim 5, characterized in that: A gas composition detector for detecting the gas composition in the valve group box is arranged in the valve group box at the induced draft fan position.

9. The gas supply pipeline system for the oil and gas dual fuel burner according to claim 1, characterized in that: A manual first nitrogen input control valve is arranged at the input end of the first nitrogen delivery pipe outside the valve group box.

Images