CN217928279U - Fuel gas supply system for methanol preheating furnace - Google Patents
Fuel gas supply system for methanol preheating furnace Download PDFInfo
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- CN217928279U CN217928279U CN202221920438.8U CN202221920438U CN217928279U CN 217928279 U CN217928279 U CN 217928279U CN 202221920438 U CN202221920438 U CN 202221920438U CN 217928279 U CN217928279 U CN 217928279U
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Abstract
The utility model discloses a fuel gas supply system for a methanol preheating furnace, which comprises a carbon-rich desorption gas buffer tank; a first pressure reducing valve and a second pressure reducing valve are sequentially arranged on the fuel gas mixer along the gas conveying direction; the outlet of the carbon-rich desorption gas buffer tank is communicated with the inlet of the fuel gas mixer through a desorption gas inlet pipeline; the outlet of the fuel gas mixer is communicated with the fuel inlet of the burner of the preheating furnace through a mixed gas pipeline. The advantages are that: the purge gas is introduced into a fuel gas mixer through a purge gas inlet pipeline, the desorption gas in the carbon-rich desorption gas buffer tank enters the fuel gas mixer along the desorption gas inlet pipeline and is mixed with the purge gas, and the mixed desorption gas and the purge gas enter a burner of a preheating furnace along a gas mixing pipeline to be used as fuel for combustion; the consumption of the coke-oven gas is effectively reduced, the cost is saved, the analytic gas is effectively recycled as the fuel, the energy waste is avoided, and the environmental pollution is avoided.
Description
The technical field is as follows:
the utility model relates to a methanol production technical field, in particular to fuel gas air supply system for methanol preheating furnace.
Background art:
in the methanol production process, after coke-oven gas from a coking plant enters a gas holder, a part of the coke-oven gas treated by a coke-oven gas compressor is sent to a fuel gas pipe network and can be used as fuel gas of a methanol preheating furnace, and the other part of the coke-oven gas is sent to a fine desulfurization working section for producing methanol; however, the use of coke oven gas as fuel gas has the following problems: 1. the consumption of coke oven gas is large, so that the cost for producing methanol is increased; 2. the coke oven gas contains substances such as sulfur, naphthalene, benzene, unsaturated hydrocarbon and the like, and sulfide and hydrocarbon in tail gas of the coke oven gas can cause pollution to the environment when the coke oven gas is used as fuel gas and is not fully combusted; in addition, the main product produced by the PSA hydrogen production device on the methanol production line is hydrogen, the byproduct is desorption gas, the components of the desorption gas are carbon dioxide, methane and carbon monoxide, the desorption gas as the byproduct is usually buffered by a buffer tank and then directly sent to a torch for treatment and then discharged, and energy waste is caused.
The utility model has the following contents:
an object of the utility model is to provide a methanol is preheated fuel gas air supply system for stove is favorable to reduction in production cost and avoid environmental pollution.
The utility model discloses by following technical scheme implement: the fuel gas supply system for the methanol preheating furnace comprises a carbon-rich desorption gas buffer tank, a fuel gas mixer, a purge gas inlet pipeline, a first pressure reducing valve and a second pressure reducing valve; the fuel gas mixer is communicated with the purge gas inlet pipeline, the first pressure reducing valve and the second pressure reducing valve are sequentially arranged on the fuel gas mixer along the gas conveying direction, and a purge gas regulating valve is arranged on the purge gas inlet pipeline between the second pressure reducing valve and the fuel gas mixer; an outlet of the carbon-rich desorption gas buffer tank is communicated with an inlet of the fuel gas mixer through a desorption gas inlet pipeline, and a desorption gas regulating valve is mounted on the desorption gas inlet pipeline; the outlet of the fuel gas mixer is communicated with the fuel inlet of the burner of the preheating furnace through a mixed gas pipeline, and a mixed gas regulating valve is arranged on the mixed gas pipeline.
Furthermore, the bottom of the fuel gas mixer is communicated with a spray guide pipe, and a spray guide valve is installed on the spray guide pipe.
Furthermore, on the air inlet pipe line of the purge air at two ends of the purge air regulating valve, a purge air on-off valve is installed, a purge air bypass valve is connected with the purge air regulating valve in parallel, the inlet of the purge air bypass valve is communicated with the inlet of one of the purge air on-off valves, and the outlet of the purge air bypass valve is communicated with the outlet of the other purge air on-off valve.
Furthermore, a mixed gas on-off valve is installed on the mixed gas pipeline at two ends of the mixed gas regulating valve, a mixed gas bypass valve is connected with the mixed gas regulating valve in parallel, an inlet of the mixed gas bypass valve is communicated with an inlet of one of the mixed gas on-off valves, and an outlet of the mixed gas bypass valve is communicated with an outlet of the other mixed gas on-off valve.
The coke oven gas mixer further comprises a coke oven gas pipeline, an inlet of the fuel gas mixer is communicated with the gas holder through the coke oven gas pipeline, and a coke oven gas on-off valve is mounted on the coke oven gas pipeline.
The utility model has the advantages that: the purge gas is introduced into a fuel gas mixer through a purge gas inlet pipeline, the desorption gas in the carbon-rich desorption gas buffer tank enters the fuel gas mixer along the desorption gas inlet pipeline and is mixed with the purge gas, and the mixed desorption gas and the purge gas enter a burner of a preheating furnace along a gas mixing pipeline to be used as fuel for combustion; therefore, the utility model effectively reduces the consumption of the coke oven gas, a large amount of the coke oven gas can be used for producing methanol, the cost is saved, in addition, the analytic gas is effectively recycled as the fuel, the energy waste is avoided, and the analytic gas does not contain sulfur, unsaturated hydrocarbon and other substances, the environmental pollution after the combustion can be greatly reduced, and the environmental pollution is avoided; the utility model discloses in the operation process, under the condition of guaranteeing PSA hydrogen plant load, can supply the preheater as fuel with the analytic gas alone, also can supply the preheater as fuel after the gas of relaxing and the gas of analyzing mixes, realize diversified production.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The components in the drawings are numbered as follows: the system comprises a carbon-rich desorption gas buffer tank 1, a fuel gas mixer 2, a purge gas inlet pipeline 3, a first pressure reducing valve 4, a second pressure reducing valve 5, a purge gas regulating valve 6, a desorption gas inlet pipeline 7, a desorption gas regulating valve 8, a mixed gas pipeline 9, a preheating furnace 10, a mixed gas regulating valve 11, a leaching guide pipe 12, a leaching guide valve 13, a purge gas on-off valve 14, a purge gas bypass valve 15, a mixed gas on-off valve 16, a mixed gas bypass valve 17, a coke oven gas pipeline 18, a gas cabinet 19 and a coke oven gas on-off valve 20.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a fuel gas supply system for a methanol preheating furnace, which includes a carbon-rich desorption gas buffer tank 1, a fuel gas mixer 2, a purge gas inlet line 3, a first pressure reducing valve 4 and a second pressure reducing valve 5; the fuel gas mixer 2 is communicated with a purge gas inlet pipeline 3, purge gas generated in the methanol synthesis process in a workshop is introduced into the fuel gas mixer 2 through the purge gas inlet pipeline 3, and in the field, the purge gas is gas which does not participate in reaction or gas which cannot be utilized due to low grade, can be directly used for fuel combustion, and is beneficial to reducing the cost of the fuel gas; the fuel gas mixer 2 is sequentially provided with a first pressure reducing valve 4 and a second pressure reducing valve 5 along the gas conveying direction, the pressure of the exhausted gas from synthesis reaches 2 kilograms, and the working pressure of the fuel gas mixer 2 is 20 kilopascals, so that in order to ensure the normal operation of the fuel gas mixer 2, the process requirements can be met after the pressure is sequentially reduced through the first pressure reducing valve 4 and the second pressure reducing valve 5.
A purge gas regulating valve 6 is arranged on a purge gas inlet pipeline 3 between the second pressure reducing valve 5 and the fuel gas mixer 2, the purge gas regulating valve 6 is opened, the purge gas enters the fuel gas mixer 2 along the purge gas inlet pipeline 3, and oil and water in the gas are separated out through the fuel gas mixer 2; the outlet of the carbon-rich desorption gas buffer tank 1 is communicated with the inlet of the fuel gas mixer 2 through a desorption gas inlet pipeline 7, a desorption gas regulating valve 8 is installed on the desorption gas inlet pipeline 7, the desorption gas regulating valve 8 is opened, the desorption gas in the carbon-rich desorption gas buffer tank 1 enters the fuel gas mixer 2 along the desorption gas inlet pipeline 7 to be mixed with the purge gas, and the oil and the water in the gas are separated out through the fuel gas mixer 2; the bottom of the fuel gas mixer 2 is communicated with a guide shower pipe 12, a guide shower valve 13 is arranged on the guide shower pipe 12, and after oil and water in the gas are separated by the fuel gas mixer 2, the oil and water are discharged from the guide shower pipe 12 by opening the guide shower valve 13; the outlet of the fuel gas mixer 2 is communicated with the fuel inlet of the burner of the preheating furnace 10 through a mixed gas pipeline 9, a mixed gas regulating valve 11 is arranged on the mixed gas pipeline 9, the mixed gas regulating valve 11 is opened, and the mixed gas and the purge gas enter the burner of the preheating furnace 10 along a gas mixing pipeline to be used as fuel for combustion; therefore, the utility model effectively reduces the consumption of the coke oven gas, a large amount of the coke oven gas can be used for producing methanol, the cost is saved, in addition, the analytic gas is effectively recycled as the fuel, the energy waste is avoided, and the analytic gas does not contain sulfur, unsaturated hydrocarbon and other substances, the environmental pollution after the combustion can be greatly reduced, and the environmental pollution is avoided; the utility model discloses in the operation, under the condition of guaranteeing PSA hydrogen plant load, can supply preheater 10 as fuel with the analytic gas alone, also can supply preheater 10 as fuel after the gas of exhausting and analytic gas mixture, realize the pluralism production.
The purge gas inlet pipelines 3 at two ends of the purge gas regulating valve 6 are provided with purge gas on-off valves 14, and are connected with the purge gas regulating valve 6 in parallel by a purge gas bypass valve 15, the inlet of the purge gas bypass valve 15 is communicated with the inlet of one of the purge gas on-off valves 14, and the outlet of the purge gas bypass valve 15 is communicated with the outlet of the other purge gas on-off valve 14; when the purge gas regulating valve 6 has a fault and needs to be overhauled, the two purge gas on-off valves 14 are closed, and the purge gas bypass valve 15 is opened, so that the purge gas temporarily enters the fuel gas mixer 2 through the purge gas bypass valve 15; a mixed gas on-off valve 16 is arranged on the mixed gas pipeline 9 at the two ends of the mixed gas regulating valve 11, a mixed gas bypass valve 17 is connected with the mixed gas regulating valve 11 in parallel, the inlet of the mixed gas bypass valve 17 is communicated with the inlet of one mixed gas on-off valve 16, and the outlet of the mixed gas bypass valve 17 is communicated with the outlet of the other mixed gas on-off valve 16; when the mixed gas regulating valve 11 is in failure and needs to be maintained, the two mixed gas on-off valves 16 are closed, the mixed gas bypass valve 17 is opened, and the mixed gas is supplied to a burner of the preheating furnace 10 through the mixed gas bypass valve 17 temporarily; the coke oven gas preheating system further comprises a coke oven gas pipeline 18, an inlet of the fuel gas mixer 2 is communicated with a gas holder 19 through the coke oven gas pipeline 18, a coke oven gas on-off valve 20 is installed on the coke oven gas pipeline 18, coke oven gas is stored in the gas holder 19, when the analyzed gas is insufficient, the coke oven gas on-off valve 20 is opened, the coke oven gas is temporarily supplied to a combustor of the preheating furnace 10 through the fuel gas mixer 2, and the back pressure phenomenon is avoided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The fuel gas supply system for the methanol preheating furnace is characterized by comprising a carbon-rich desorption gas buffer tank, a fuel gas mixer, a purge gas inlet pipeline, a first pressure reducing valve and a second pressure reducing valve; the fuel gas mixer is communicated with the purge gas inlet pipeline, the first pressure reducing valve and the second pressure reducing valve are sequentially installed on the fuel gas mixer along the gas conveying direction, and a purge gas regulating valve is installed on the purge gas inlet pipeline between the second pressure reducing valve and the fuel gas mixer; an outlet of the carbon-rich desorption gas buffer tank is communicated with an inlet of the fuel gas mixer through a desorption gas inlet pipeline, and a desorption gas regulating valve is mounted on the desorption gas inlet pipeline; the outlet of the fuel gas mixer is communicated with the fuel inlet of the burner of the preheating furnace through a mixed gas pipeline, and a mixed gas regulating valve is arranged on the mixed gas pipeline.
2. The fuel gas supply system for the methanol preheating furnace according to claim 1, wherein a shower guide pipe is communicated with the bottom of the fuel gas mixer, and a shower guide valve is installed on the shower guide pipe.
3. The fuel gas supply system for the methanol preheating furnace according to claim 1, wherein a purge gas on-off valve is installed on the purge gas inlet line at both ends of the purge gas regulating valve, a purge gas bypass valve is connected in parallel with the purge gas regulating valve, an inlet of the purge gas bypass valve is communicated with an inlet of one of the purge gas on-off valves, and an outlet of the purge gas bypass valve is communicated with an outlet of the other purge gas on-off valve.
4. The fuel gas supply system for a methanol preheater according to claim 1, wherein a mixture on-off valve is installed on said mixture gas line at both ends of said mixture control valve, a mixture bypass valve is connected in parallel to said mixture control valve, an inlet of said mixture bypass valve is connected to an inlet of one of said mixture on-off valves, and an outlet of said mixture bypass valve is connected to an outlet of the other of said mixture on-off valves.
5. The fuel gas supply system for the methanol preheating furnace as claimed in claim 1, further comprising a coke oven gas line, wherein the inlet of the fuel gas mixer is communicated with the gas holder through the coke oven gas line, and the coke oven gas line is provided with a coke oven gas on-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221920438.8U CN217928279U (en) | 2022-07-22 | 2022-07-22 | Fuel gas supply system for methanol preheating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221920438.8U CN217928279U (en) | 2022-07-22 | 2022-07-22 | Fuel gas supply system for methanol preheating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217928279U true CN217928279U (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221920438.8U Active CN217928279U (en) | 2022-07-22 | 2022-07-22 | Fuel gas supply system for methanol preheating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217928279U (en) |
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2022
- 2022-07-22 CN CN202221920438.8U patent/CN217928279U/en active Active
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