CN219036654U - Torch fuel gas supply system for preparing LNG (liquefied Natural gas) and co-producing synthetic ammonia from coke oven gas - Google Patents
Torch fuel gas supply system for preparing LNG (liquefied Natural gas) and co-producing synthetic ammonia from coke oven gas Download PDFInfo
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- CN219036654U CN219036654U CN202223351151.0U CN202223351151U CN219036654U CN 219036654 U CN219036654 U CN 219036654U CN 202223351151 U CN202223351151 U CN 202223351151U CN 219036654 U CN219036654 U CN 219036654U
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Abstract
The utility model relates to the technical field of coke oven gas treatment equipment, in particular to a torch fuel gas supply system for preparing LNG and co-producing synthetic ammonia by using coke oven gas, which has the technical scheme that the system comprises the following components: an LNG storage device; a plurality of pipes; the air inlet end of the gasifier is communicated with the air outlet end of the LNG storage device through the pipeline; the air inlet end of the torch device is communicated with the air outlet end of the gasifier through the pipeline; a coke oven gas storage device; the air inlet end of the first centrifugal compressor is communicated with the air outlet end of the coke oven gas storage device through the pipeline; the air inlet end of the temperature swing adsorption device is communicated with the air outlet end of the first centrifugal compressor through the pipeline; the air outlet end of the air outlet pipe is communicated with the air inlet end of the torch device through the pipe. The utility model has the advantages of saving cost, meeting the requirements of fuel gas under various special working conditions and improving the process safety of the torch device.
Description
Technical Field
The utility model relates to the technical field of coke oven gas treatment equipment, in particular to a torch fuel gas supply system for preparing LNG and co-producing synthetic ammonia from coke oven gas.
Background
The coke oven gas is a byproduct of the coking industry, and the main components of the coke oven gas are hydrogen (volume fraction of 55-60%) and methane (volume fraction of 23-27%), so that the coke oven gas has high utilization value. LNG is used as clean energy, and plays an irreplaceable role in relieving haze. The liquid ammonia is used as a raw material for producing chemical fertilizers, and plays an irreplaceable role in ensuring stable and high yield of grains. The LNG co-production synthetic ammonia prepared from coke oven gas has the advantages of strong product competitiveness, low cost and good benefit.
The torch device can ensure that the operation and accident exhaust gas can be stably and safely combusted under any condition, and abnormal phenomena such as fire release, incomplete combustion, flameout and the like do not occur. The method is that the last safety barrier is built during the operation of 'stable and full-grown good' of an enterprise for preparing LNG and co-producing synthetic ammonia from coke oven gas. The pilot burner is a necessary requirement of a torch device, and how to ensure the cleanness and stability of the fuel gas by taking the fuel gas as a gas source for the normal operation and stability of the pilot burner has become a focus of attention of an enterprise for producing LNG and co-producing synthetic ammonia by using coke oven gas.
However, existing flare apparatuses suffer from the following drawbacks: (1) The gas is compressed by purchasing a small reciprocating or screw compressor alone; (2) When the whole plant fails, the gas discharged by the device cannot burn through the torch device due to the lack of fuel gas, so that safety and environmental pollution accidents are caused.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a torch fuel gas supply system for preparing LNG and co-producing synthetic ammonia from coke oven gas, which has the advantages of no need of purchasing a small reciprocating or screw compressor and improving the process safety of a torch device.
The technical aim of the utility model is achieved by the following technical scheme, namely a torch fuel gas supply system for preparing LNG and co-producing synthetic ammonia from coke oven gas, which comprises the following components:
an LNG storage device;
a plurality of pipes;
the air inlet end of the gasifier is communicated with the air outlet end of the LNG storage device through the pipeline;
the air inlet end of the torch device is communicated with the air outlet end of the gasifier through the pipeline;
a coke oven gas storage device;
the air inlet end of the first centrifugal compressor is communicated with the air outlet end of the coke oven gas storage device through the pipeline;
the air inlet end of the temperature swing adsorption device is communicated with the air outlet end of the first centrifugal compressor through the pipeline; the air outlet end of the air outlet pipe is communicated with the air inlet end of the torch device through the pipe.
In one embodiment, a first valve is provided on the conduit between the LNG storage device and the vaporizer.
In one embodiment, the gas outlet end of the gasifier is in communication with a mixed refrigerant system through the conduit.
In one embodiment, a pressure gauge and a temperature gauge are provided on the conduit between the gasifier and the mixed refrigerant system.
In one embodiment, a second valve is provided on the conduit between the pressure gauge, the temperature gauge and the mixed refrigerant system.
In one embodiment, a third valve is disposed on the conduit between the gasifier and the flare apparatus.
In one embodiment, the conduit between the gasifier and the flare apparatus is further provided with a first check valve.
In one embodiment, a fourth valve is disposed on the conduit between the temperature swing adsorption device and the flare apparatus.
In one embodiment, the conduit between the temperature swing adsorption device and the flare apparatus is further provided with a second check valve.
In one embodiment, the outlet end of the temperature swing adsorption apparatus is in communication with a second centrifugal compressor through the conduit.
Above-mentioned flare fuel gas supply system of coke oven gas system LNG coproduction synthetic ammonia has following
The beneficial effects are that:
firstly, the cost is saved, and the reciprocating machine or the screw compressor does not need to be purchased additionally;
secondly, the blocking working condition of the fuel gas pipeline is optimized, and the steam purging use is reduced;
thirdly, the requirements of fuel gas under various special working conditions are met after LNG is gasified, the process safety of the torch device is improved, and the safety combustion of the device is ensured under the power failure working condition without generating the problems of safety and environmental pollution;
fourth, ensure clean and stable of flare apparatus fuel gas source under various operating modes of coke oven gas to produce LNG and co-produce synthetic ammonia device.
Drawings
Fig. 1 is a flow chart of the working principle of the device of the present embodiment.
In the figure: 1. an LNG storage device; 11. a first valve; 2. a gasifier; 21. a pressure gauge; 22. a thermometer; 23. a second valve; 24. a third valve; 25. a first check valve; 3. a flare apparatus; 4. a coke oven gas storage device; 5. a first centrifugal compressor; 6. a temperature swing adsorption device; 61. a fourth valve; 62. a second check valve; 7. a mixed refrigerant system; 8. a second centrifugal compressor.
Detailed Description
The present utility model will be described in detail below with reference to the accompanying drawings and examples.
In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" is at least two unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
As shown in fig. 1, a flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas comprises: an LNG storage device 1, several pipes, a gasifier 2, a flare apparatus 3, a coke oven gas storage device 4, a first centrifugal compressor 5 and a temperature swing adsorption device 6.
Wherein the LNG storage device 1 is for storing liquid LNG; the air inlet end of the gasifier 2 is communicated with the air outlet end of the LNG storage device 1 through a pipeline and is used for converting liquid LNG into gaseous methane; the gas inlet end of the torch device 3 is communicated with the gas outlet end of the gasifier 2 through a pipeline and is used for safely burning fuel gas, wherein the fuel gas comprises gaseous methane and treated coke oven gas; the coke oven gas storage device 4 is used for storing coke oven gas; the air inlet end of the first centrifugal compressor 5 is communicated with the air outlet end of the coke oven gas storage device 4 through a pipeline and is used for compressing the coke oven gas from normal pressure to 0.5MPag; the air inlet end of the temperature swing adsorption device 6 is communicated with the air outlet end of the first centrifugal compressor 5 through a pipeline, and the air outlet end of the temperature swing adsorption device 6 is communicated with the air inlet end of the torch device 3 through a pipeline and is used for removing oil and naphthalene from coke oven gas.
In the embodiment, the LNG storage device 1 is an LNG storage tank, the coke oven gas storage device 4 is a coke oven gas cabinet, and the capacity of the LNG storage tank can meet the normal flow of the torch fuel gas under the normal working condition of 200 hours and the abnormal working condition of 50 hours.
Further, a first valve 11 is provided on a pipe between the LNG storage device 1 and the vaporizer 2 for controlling the flow rate of LNG from the LNG storage device 1 to the vaporizer 2.
Further, the air outlet end of the gasifier 2 is communicated with a mixed refrigerant system 7 through a pipeline for producing cooled liquefied mixed gas. And a pressure gauge 21 and a temperature gauge 22 are provided on the piping between the vaporizer 2 and the mixed refrigerant system 7 for measuring the pressure and temperature of LNG. A second valve 23 is provided in the piping between the pressure gauge 21, the temperature gauge 22 and the mixed refrigerant system 7 for controlling the flow of LNG from the vaporizer 2 to the mixed refrigerant system 7.
Further, a third valve 24 is provided in the conduit between the vaporizer 2 and the flare apparatus 3 for controlling the flow of LNG from the vaporizer 2 to the flare apparatus 3. And the conduit between the gasifier 2 and the flare apparatus 3 is also provided with a first check valve 25 for preventing reflux of LNG.
Further, a fourth valve 61 is provided in the conduit between the temperature swing adsorption device 6 and the flare apparatus 3 for controlling the flow of coke oven gas from the temperature swing adsorption device 6 to the flare apparatus 3. And the conduit between the temperature swing adsorption device 6 and the flare apparatus 3 is also provided with a second check valve 62 for preventing backflow of coke oven gas. The air outlet end of the temperature swing adsorption device 6 is communicated with a second centrifugal compressor 8 through a pipeline, and the rest coke oven gas is subjected to secondary compression.
The first valve 11, the second valve 23, the third valve 24 and the fourth valve 61 are all emergency shut-off valves for fuel gas.
In this embodiment, the working mode of the present utility model is as follows:
(1) In the case of an initial start-up: the fuel gas in the flare apparatus 3 comes from the LNG storage device 1, and the liquid LNG is introduced into the first valve 11 which is opened and then introduced into the vaporizer 2 to be changed into gaseous methane. Gaseous methane flows from the gasifier 2 through the open third valve 24 and the first check valve 25 before being fed to the flare apparatus 3 as pilot lamp fuel gas. The second valve 23 and the fourth valve 61 are in a closed state.
(2) Under normal conditions: the fuel gas of the torch device 3 comes from the coke oven gas storage device 4, the coke oven gas flows out from the coke oven gas storage device 4 and then sequentially flows into the first centrifugal compressor 5 and the temperature swing adsorption device 6 to compress the coke oven gas and remove naphthalene from oil, and the treated coke oven gas passes through the fourth valve 61 and the second check valve 62 and then flows into the torch device 3 to be used as the fuel gas of the pilot burner. The first valve 11, the second valve 23 and the third valve 24 are closed.
(3) Under the power failure working condition: the fuel gas of the flare device 3 comes from the LNG storage device 1, LNG is gasified through the first valve 11 and the gasifier 2 which are opened in sequence, and gasified gaseous methane is introduced into the flare device 3 through the third valve 24 and the first check valve 25 to be used as the fuel gas of the pilot lamp. The second valve 23 and the fourth valve 61 are in a closed state.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas, comprising:
an LNG storage device;
a plurality of pipes;
the air inlet end of the gasifier is communicated with the air outlet end of the LNG storage device through the pipeline;
the air inlet end of the torch device is communicated with the air outlet end of the gasifier through the pipeline;
a coke oven gas storage device;
the air inlet end of the first centrifugal compressor is communicated with the air outlet end of the coke oven gas storage device through the pipeline;
the air inlet end of the temperature swing adsorption device is communicated with the air outlet end of the first centrifugal compressor through the pipeline; the air outlet end of the air outlet pipe is communicated with the air inlet end of the torch device through the pipe.
2. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 1, wherein: a first valve is disposed on the conduit between the LNG storage device and the vaporizer.
3. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 1, wherein: and the air outlet end of the gasifier is communicated with a mixed refrigerant system through the pipeline.
4. A flare fuel gas supply system for producing LNG co-production synthetic ammonia from coke oven gas according to claim 3, characterized in that: and a pressure gauge and a temperature gauge are arranged on the pipeline between the gasifier and the mixed refrigerant system.
5. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 4, wherein: and a second valve is arranged on the pipeline between the pressure gauge, the thermometer and the mixed refrigerant system.
6. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 1, wherein: a third valve is disposed on the conduit between the gasifier and the flare apparatus.
7. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 1, wherein: the conduit between the gasifier and the flare apparatus is also provided with a first check valve.
8. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 1, wherein: a fourth valve is disposed on the conduit between the temperature swing adsorption device and the flare apparatus.
9. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 1, wherein: the conduit between the temperature swing adsorption device and the flare apparatus is also provided with a second check valve.
10. The flare fuel gas supply system for producing LNG and co-producing synthetic ammonia from coke oven gas according to claim 1, wherein: and the air outlet end of the temperature swing adsorption device is communicated with a second centrifugal compressor through the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223351151.0U CN219036654U (en) | 2022-12-14 | 2022-12-14 | Torch fuel gas supply system for preparing LNG (liquefied Natural gas) and co-producing synthetic ammonia from coke oven gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223351151.0U CN219036654U (en) | 2022-12-14 | 2022-12-14 | Torch fuel gas supply system for preparing LNG (liquefied Natural gas) and co-producing synthetic ammonia from coke oven gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219036654U true CN219036654U (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223351151.0U Active CN219036654U (en) | 2022-12-14 | 2022-12-14 | Torch fuel gas supply system for preparing LNG (liquefied Natural gas) and co-producing synthetic ammonia from coke oven gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219036654U (en) |
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- 2022-12-14 CN CN202223351151.0U patent/CN219036654U/en active Active
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