CN209872888U - Station desulfurization device for low-potential sulfur natural gas - Google Patents
Station desulfurization device for low-potential sulfur natural gas Download PDFInfo
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- CN209872888U CN209872888U CN201920603922.XU CN201920603922U CN209872888U CN 209872888 U CN209872888 U CN 209872888U CN 201920603922 U CN201920603922 U CN 201920603922U CN 209872888 U CN209872888 U CN 209872888U
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Abstract
The utility model relates to a low sulfur natural gas's station desulfurization device belongs to the oil engineering field, the utility model provides a pair of low sulfur natural gas's station desulfurization method, a low sulfur natural gas's station desulfurization device, include: the gas-liquid separation device comprises a gas-liquid separation device, a heating device and a liquid desulfurization device, wherein the gas inlet end of the gas-liquid separation device is used for introducing gas through a pipeline, the gas outlet end of the gas-liquid separation device is connected with the gas inlet end of the liquid desulfurization device through the pipeline through the heating device, and the gas outlet end of the liquid desulfurization device is used for delivering gas through the pipeline. The adoption of the liquid desulfurization device can effectively avoid the need of using two desulfurization towers for alternate operation during the solid dry desulfurization, and can reduce the workload of field operators; because the generated desulfurization products are water-soluble liquid, the safety and reliability are higher, the waste desulfurizer is nontoxic and harmless, can be reinjected into a stratum along with the treated natural gas produced liquid, has small treatment difficulty and is not easy to pollute the environment.
Description
Technical Field
The utility model belongs to the natural gas purifies the field, concretely relates to station desulfurization device of low latent sulphur natural gas.
Background
If the natural gas extracted from the stratum contains hydrogen sulfide, the natural gas can corrode equipment and pipelines, and the hydrogen sulfide is a highly toxic gas, so that the leakage of the hydrogen sulfide not only causes environmental pollution, but also can cause serious harm to human bodies. Therefore, hydrogen sulfide must be removed from the sour gas before it can be sent to downstream customers.
According to the mass of sulfur elements contained in the natural gas, the scale of the desulfurization treatment of the natural gas can be divided into the scale of low potential sulfur (elemental sulfur less than 0.1 t/d), medium potential sulfur (elemental sulfur of 0.1-30 t/d) and high potential sulfur (elemental sulfur more than 30 t/d). For the desulfurization of natural gas with low latent sulfur content, the domestic gas collection station usually adopts an iron oxide solid dry-process desulfurization process.
In the process of implementing the embodiments of the present invention, the inventor finds that at least the following defects exist in the background art:
the adoption of the ferric oxide solid dry method mode requires two desulfurization towers to be operated alternately, when the desulfurizer in one desulfurization tower is saturated, the desulfurization tower is switched to the other desulfurization tower to be desulfurized, and the desulfurizer needs to be replaced regularly, so that the operation is complex, time and labor are wasted, spontaneous combustion is easy to occur after the waste desulfurizer is contacted with air, the safety problem is easy to cause, and the environmental pollution problem is easy to cause due to the great difficulty in recycling the waste desulfurizer.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low station desulfurization device of latent sulphur natural gas, aim at solves above-mentioned problem, the solution adopts ferric oxide solid dry method mode to need two desulfurizing towers to carry out alternate operation, when the desulfurizer in a desulfurizing tower reaches the saturation, switch to another desulfurizing tower and carry out the desulfurization, need regularly change the desulfurizer, this kind of mode operation is complicated, waste time and energy, very easily take place the spontaneous combustion behind waste desulfurizer and the air contact, and the big problem of the waste desulfurizer recovery processing degree of difficulty.
In order to achieve the above object, the utility model adopts the following technical scheme:
a station desulfurization unit for low latent sulfur natural gas, comprising: the gas-liquid separation device comprises a gas-liquid separation device, a heating device and a liquid desulfurization device, wherein the gas inlet end of the gas-liquid separation device is used for introducing gas through a pipeline, the gas outlet end of the gas-liquid separation device is connected with the gas inlet end of the liquid desulfurization device through the pipeline through the heating device, and the gas outlet end of the liquid desulfurization device is used for delivering gas through the pipeline.
The gas outlet end of the liquid desulfurization device is provided with a hydrogen sulfide detection alarm device and a metering device, the gas outlet end of the liquid desulfurization device is used for gas transmission through the metering device, and the hydrogen sulfide detection alarm device is connected with the gas outlet end of the liquid desulfurization device in parallel.
The gas inlet end of the gas-liquid separation device is provided with a manifold, and the gas inlet end of the gas-liquid separation device is connected with a plurality of pipelines through the manifold.
And a desulfurizer storage tank is arranged outside the liquid desulfurization device and is connected with the liquid desulfurization device through a pipeline.
The gas outlet end of the liquid desulfurization device is provided with a pressurization device and a metering device, and the gas outlet end of the liquid desulfurization device is used for conveying gas through the pressurization device and the metering device.
The device comprises a gas-liquid separation device, a flash liquid separation device, a buried water sewage device and a blow-down torch outside a station, wherein the gas-liquid separation device is also provided with the flash liquid separation device, the buried water sewage device and the blow-down torch outside the station, a liquid outlet of the gas-liquid separation device, a liquid outlet of the liquid desulfurization device and a liquid outlet of the supercharging device are respectively connected with the flash liquid separation device through pipelines, a liquid outlet of the flash liquid separation device is connected with the buried water sewage device, and a gas outlet end of the flash.
And a vent main pipe and a second safety valve are arranged between the gas inlet end of the gas-liquid separation device and the flash liquid separation device, the gas inlet end of the gas-liquid separation device is used for introducing gas through the second safety valve, and a safety gas outlet of the second safety valve is connected with the flash liquid separation device through the vent main pipe.
And a first safety valve is arranged on a pipeline at the gas inlet end of the gas collecting pipe, and a safety gas outlet of the first safety valve is connected with the flash liquid separating device through an emptying main pipe.
Liquid device's inlet department is equipped with first valve and bypass pipeline in the flash distillation, and the flash distillation divides liquid device warp first valve passes through bypass pipeline is connected with ground buried water sewage device, wherein be provided with the second valve on the bypass pipeline.
And a liquid level measuring device is arranged in the underground sewage tank.
The utility model has the advantages that the adoption of the liquid desulfurization device can effectively avoid the need of using two desulfurization towers for alternate operation when the solid dry desulfurization is carried out, and can reduce the work burden of field operators; because the generated desulfurization products are water-soluble liquid, the safety and reliability are higher, the waste desulfurizer is nontoxic and harmless, can be reinjected into a stratum along with the treated natural gas produced liquid, has small treatment difficulty and is not easy to pollute the environment.
Drawings
Fig. 1 is an overall schematic diagram of a station desulfurization device for low-sulfur natural gas according to an embodiment of the present invention.
FIG. 2 shows the absorption of H by 1,3, 5-tris (2-hydroxyethyl) hexahydro-s-triazine2And S is a schematic diagram.
The reference numbers in the figure are 1, a header; 2. a gas-liquid separation device; 3. a heating device; 4. a liquid desulfurization unit; 5. a pressure boosting device; 6. a metering device; 7. a flash evaporation liquid separation device; 8. a buried water sewage plant; 9. a pipeline; 10. emptying a header pipe; 11. a desulfurizer storage tank storage device; 12. a first safety valve; 13. a second relief valve; 14. a first valve; 15. a second valve.
Detailed Description
It should be noted that, in the embodiments of the present invention, the terms referred to are:
the liquid desulfurization device 4, the triazine desulfurizer can be stored in the liquid desulfurization device, the liquid desulfurization device uses the triazine desulfurizer to remove hydrogen sulfide in gas, and the specific desulfurization is a desulfurization tower principle in the prior art, which is a known technology in the prior art; or the liquid desulfurization apparatus 4 employs a patent applied by the inventor: an integrated device based on triazine solution desulfurization; application No.: CN 201721894545.7.
Desulfurizer storage tank 11 for storing triazine desulfurizer's storage container, it is provided with check valve, gate valve, quick-operation joint, explosion-proof flame arrester, and specific desulphurization unit also can select the methanol tank for use, and it is known in the prior art.
The hydrogen sulfide detection alarm device is a hydrogen sulfide online detector, in particular to a hydrogen sulfide detection alarm device which is an integrated machine which is fixed on a linear hydrogen sulfide belt display and provided with an audible and visual alarm in the prior art; the detector can be a pointer type ammeter detector of hydrogen sulfide, an intelligent hydrogen sulfide detector and the like, which are known in the prior art; alternatively, the products are manufactured and sold by Ningbo high-tech limited.
The station desulfurization scheme of the low-sulfur natural gas provided by the embodiments of the present invention will be described in detail through several specific embodiments.
Referring to fig. 1, a station desulfurization device for low-sulfur natural gas according to an embodiment of the present invention is shown, and the station desulfurization device for low-sulfur natural gas includes: gas-liquid separation device 2, heating device 3 and liquid desulphurization unit 4, the inlet end of gas-liquid separation device 2 admits air through the pipeline, and the end of giving vent to anger of gas-liquid separation device 2 is connected through the inlet end of heating device 3 and liquid desulphurization unit 4 through the pipeline, and the end of giving vent to anger of liquid desulphurization unit 4 is through pipeline defeated gas.
In the above embodiment, the gas-liquid separation device 2 and the heating device 3 are the prior art, and the liquid desulfurization device 4, specifically, the gas-liquid separation device 2 of the wet desulfurization tower, is communicated with the liquid desulfurization device 4 through the heating device 3 via a pipeline for desulfurization; the inside of the optional gas-liquid separation device 2 adopts spray desulfurization.
In this embodiment, it is preferable that the triazine desulfurizing agent is used for sulfur removal, so that the low latent sulfur natural gas treated by the gas-liquid separating device 2 needs to be heated to a temperature of more than ten degrees to sufficiently react the hydrogen sulfide with the triazine desulfurizing agent in order to sufficiently react the hydrogen sulfide with the triazine desulfurizing agent.
Further, referring to fig. 1, a hydrogen sulfide detection alarm device and a metering device 6 are disposed at an air outlet end of the liquid desulfurization device 4, air is delivered from the air outlet end of the liquid desulfurization device 4 through the metering device 6, and the hydrogen sulfide detection alarm device is connected in parallel with the air outlet end of the liquid desulfurization device 4.
In the above embodiment, the step of conveying the natural gas desulfurized in the liquid desulfurization device to the downstream includes that the natural gas desulfurized in the liquid desulfurization device is detected by a detection instrument, the natural gas is metered by the metering device 6 and conveyed to the downstream if the natural gas meets the sulfur-containing requirement, and the intake of the low-potential sulfur natural gas is closed if the natural gas does not meet the sulfur-containing requirement, so that the natural gas station is overhauled. After the hydrogen sulfide is detected by a detection instrument, if the content of the hydrogen sulfide exceeds the standard, an alarm device is triggered to alarm. The embodiment can effectively avoid that the treated natural gas contains hydrogen sulfide to cause damage to the lower end pipeline and harm to personnel, and the hydrogen sulfide detection alarm device is in the prior art and is connected in parallel with the pipeline for measurement when being installed.
Further, referring to fig. 1, a manifold 1 is disposed at a gas inlet end of the gas-liquid separation device 2, and the gas inlet end of the gas-liquid separation device 2 is connected to a plurality of pipelines through the manifold 1.
In the embodiment, the manifold 1 is arranged at the gas inlet end of the gas-liquid separation device 2, so that natural gas of a plurality of natural gas wells can be gathered through the manifold, and is sent to the gas-liquid separation device 2 for treatment after being gathered through the manifold 1, and a large amount of low-potential sulfur natural gas can be treated at one time.
Further, please refer to fig. 1, a desulfurizer storage tank 11 is disposed outside the liquid desulfurization device 4, and the desulfurizer storage tank 11 is connected to the liquid desulfurization device 4 through a pipeline.
In the above embodiment, the desulfurizer storage tank 11 is arranged outside the liquid desulfurization device 4, the desulfurizer storage tank 11 mainly stores triazine-type desulfurizer, the pump body is arranged in the liquid desulfurization device 4, the desulfurizer in the desulfurizer storage tank 11 can be extracted by the pump body at a constant speed, the desulfurizer is conveyed to the liquid desulfurization device 4 through the pump body, the triazine-type desulfurizer can be continuously conveyed to the liquid desulfurization device 4, and the desulfurizer is continuously provided for low-potential sulfur natural gas to be treated.
Further, referring to fig. 1, the gas outlet end of the liquid desulfurization device 4 is provided with a pressurization device 5 and a metering device 6, and the gas outlet end of the liquid desulfurization device 4 is delivered through the pressurization device 5 and the metering device 6.
In the above embodiment, the supercharging device is a gas supercharging pump in the prior art, which is pneumatic or electric; because the operation working conditions in winter and summer are different, the natural gas needs to be increased and conveyed after being pressurized in winter; in summer, the air pressure can be directly conveyed to downstream for conveying, and the pressure control in different periods in winter and summer can effectively ensure the conveying of natural gas. The natural gas is pressurized to 3.5 MPa in winter, so that the transportation of the natural gas in winter can be effectively ensured.
Further, referring to fig. 1, the gas-liquid separation device 2 is further provided with a flash liquid separation device 7, a buried water sewage device 8 and a blow-down torch located outside the station, a liquid outlet of the gas-liquid separation device 2, a liquid outlet of the liquid desulfurization device 4 and a liquid outlet of the pressurization device 5 are respectively connected with the flash liquid separation device 7 through pipelines, a liquid outlet of the flash liquid separation device 7 is connected with the buried water sewage device 8, and a gas outlet end of the flash liquid separation device 7 is connected with the blow-down torch.
In the above embodiment, in order to ensure sewage transportation and treatment, the liquid separated in the gas-liquid separation device 2, the pressurization device 5, and the liquid desulfurization device 4 needs to be sent to the flash liquid separation device 7 for flash evaporation, the separated liquid enters the flash liquid separation device 7 through the pipeline 9, passes through the flash liquid separation device 7, enters the buried sewage tank 8, and the liquid level of the buried sewage tank 8 reaches a high liquid level and is then periodically transported to the downstream by a tank truck for treatment. And introducing the separated gas into an emptying torch, and burning the residual natural gas, hydrogen sulfide or other combustible gases.
Further, referring to fig. 1, a vent header 10 and a second safety valve 13 are provided between the gas inlet of the gas-liquid separation device 2 and the flash liquid separation device 7, the gas inlet of the gas-liquid separation device 2 is fed through the second safety valve 13, and a safety exhaust port of the second safety valve 13 is connected to the flash liquid separation device 7 through the vent header 10.
In the above embodiment, at the gas inlet of the gas-liquid separation device 2, in order to prevent the gas pressure of the incoming low-sulfur-content natural gas from being too high and causing equipment load, a second safety valve 13 is disposed at the gas inlet of the gas-liquid separation device 2, the second safety valve 13 is used for discharging the natural gas with more than low-sulfur content when the gas pressure at the gas inlet of the gas-liquid separation device 2 is too high, reducing the pressure of the equipment, the discharged low-sulfur-content natural gas is delivered to the liquid separation flash device 7 through the main emptying pipe 10, and the gas in the liquid separation flash device 7 enters the emptying torch to be combusted, so as to avoid pollution to the environment.
Further, referring to fig. 1, a first safety valve 12 is disposed on a pipeline at the gas inlet end of the gas collecting pipe 1, and a safety exhaust port of the first safety valve 12 is connected to the flash liquid separating device 7 through a vent main pipe 10.
In the above embodiment, in order to prevent the pipeline from bursting due to the overlarge pressure of the pipeline from the gas well to the junction 1 on the pipeline at the gas inlet end of the junction 1, the first safety valve 12 is arranged on the pipeline, the maximum pressure on the pipeline is limited, and the first safety valve 12 discharges the redundant natural gas from the safety vent to be a protection measure for the pipeline.
Further, referring to fig. 1, a first valve 14 and a bypass pipeline are arranged at an inlet of the flash liquid separation device 7, the flash liquid separation device 7 is connected to the underground sewage device 8 through the first valve 14 and the bypass pipeline, and a second valve 15 is arranged on the bypass pipeline.
In the above-mentioned embodiment, when liquid device goes wrong in the flash distillation, in order not to influence the production of natural gas, divide the feed liquor that liquid device can be used to keep apart or open the flash distillation in first valve 14 of liquid device's inlet installation, and install the bypass line between the feed liquor of first valve 14 and bury water sewage device, can directly carry the liquid that separates among gas-liquid separation device 2, supercharging device 5 and the liquid desulphurization unit 4 to bury in the water sewage device with ground in the short time and save when liquid device goes wrong in the flash distillation, wherein first valve 14 and second valve 15 are the on-off valve, and the valve can be ball valve or butterfly valve.
Further, a liquid level measuring device is arranged in the underground sewage tank 8.
The liquid level measuring device is used for burying the liquid level height in the sewage tank 8 for operating personnel with providing, and the liquid full condition in burying the sewage tank 8 is in time known to in time, in time reminds to bury the water solution in the sewage tank 8 and clear up.
Low latent sulfur natural gas (less than 0.1t/d elemental sulfur), firstly carrying out gas-liquid separation on the sulfur-containing natural gas, feeding the separated natural gas of produced liquid into a heating furnace, and heating to an optimal reaction temperature: 10 to 30 ℃. The heated natural gas enters a liquid desulfurization device, the water solution of the triazine desulfurizer and hydrogen sulfide are subjected to irreversible chemical reaction to generate thiadiazine, and the hydrogen sulfide in the natural gas of the old gas well is removed and then is conveyed to the downstream. Through the station desulfurization process of the low-potential sulfur natural gas, hydrogen sulfide in the natural gas is removed, the generated desulfurization product is water-soluble liquid, the safety and reliability are high, and the waste desulfurizer is non-toxic and harmless and can be reinjected into the stratum along with the treated natural gas produced liquid.
The gas-liquid separation device 2 is composed of a gas-liquid separator, a pressure transmitter, a liquid level transmitter, a gate valve, a safety valve, a cut-off stop emptying valve, an electric ball valve and a drain valve, the equipment is formed by connecting a natural gas pipeline, an emptying pipeline and a sewage discharge pipeline, and the gas-liquid separation device 2 is in the prior art.
The heating device 3 consists of a heating furnace, a thermometer, a ball valve, a gate valve, a pressure reducing valve and a fire relief valve, the equipment is formed by connecting a natural gas pipeline and a fuel gas pipeline, and the heating device 3 is in the prior art.
Liquid desulphurization unit 4 for liquid desulfurization integration, constitute by desulfurizing tower, hydrogen sulfide on-line monitoring appearance, fluid infusion pump, circulating pump, manometer, flowmeter, pressure transmitter, differential pressure transmitter, level gauge, equipment comprises natural gas pipeline, unloading pipeline, sewage pipes line, the pipeline connection forms, the integrated prior art that is integrated of liquid desulfurization.
Supercharging device 5 constitute by compressor, manometer, ball valve, gate valve, equipment is formed by natural gas pipeline, unloading pipeline, sewage pipes connection, supercharging device 5 is prior art.
The flash separation device 7 is composed of a flash separator, a pressure transmitter, a liquid level transmitter, a gate valve, a safety valve, a cut-off stop emptying valve, an electric ball valve and a drain valve, the equipment is formed by connecting a natural gas emptying pipeline and a sewage pipeline, and the flash separation device 7 is in the prior art.
The underground sewage device 8 consists of an underground sewage tank, a liquid level transmitter, a gate valve, a butterfly valve, a breather valve and a quick connector, the equipment is formed by connecting an emptying pipeline and a sewage discharge pipeline, and the underground sewage device 8 is in the prior art.
In FIG. 2, the principle of the desulfurization reaction for desulfurizing the triazine solution is shown. The desulfurization process adopts the irreversible chemical reaction of the water solution of the triazine desulfurizer and the hydrogen sulfide to generate the thiadiazine, thereby achieving the purpose of removing the hydrogen sulfide in the natural gas. Because the generated desulfurization products are all water-soluble liquid, the safety and the reliability are higher, and the waste desulfurizer is easy to recycle.
Referring to fig. 1, an embodiment of a station desulfurization solution for low-sulfur natural gas according to the present invention is a station desulfurization method for low-sulfur natural gas, comprising:
step 1, introducing the low-potential sulfur natural gas into a gas-liquid separation device 2 for gas-liquid separation treatment;
step 2, heating the natural gas separated by the gas-liquid separation device 2 to 10-30 ℃ by a heating device 3, and introducing the heated natural gas into a liquid desulfurization device 4 filled with triazine desulfurizer for full reaction, wherein the triazine desulfurizer removes hydrogen sulfide in the natural gas in the liquid desulfurization device 4;
and 3, conveying the desulfurized natural gas in the liquid desulfurization device 4 to the downstream.
In the above embodiment, the low latent sulfur natural gas enters the gas-liquid separator 2, the separated natural gas enters the heating device 3, the natural gas is heated to 10 to 30 ℃ by the heating device 3, and then enters the liquid desulfurization device 4, and is reversely and sufficiently contacted with the liquid desulfurizing agent triazine solution in the desulfurization tower of the liquid desulfurization device 4 to react to remove hydrogen sulfide, and the natural gas from which the hydrogen sulfide is removed is conveyed to the downstream.
In the embodiment, the liquid of the triazine desulfurizer is used for sulfur removal, so that the natural gas with low potential sulfur content can be treated, the generated desulfurization product is water-soluble liquid, so that the safety and reliability are higher, and the waste desulfurizer is non-toxic and harmless and can be reinjected into a stratum along with the treated natural gas produced liquid.
Further, in the step 3, the step of conveying the natural gas desulfurized in the liquid desulfurization device 4 to the downstream specifically includes that the natural gas desulfurized in the liquid desulfurization device 4 is detected by the hydrogen sulfide detection alarm device, if the natural gas meets the sulfur-containing requirement, the natural gas is metered by the metering device 6 and then conveyed to the downstream, and if the natural gas does not meet the sulfur-containing requirement, the intake of the low-potential sulfur natural gas is closed, and the natural gas station is overhauled.
In the above embodiment, when the liquid of the triazine desulfurizer is desulfurized, the reaction is sufficient because the contact area is larger than the dry desulfurization area; however, in some cases, when the equipment is in failure, the operating parameters and the setting parameters of the desulfurization device are not in accordance, desulfurization is performed under the condition that the desulfurizer is insufficient, and the desulfurized natural gas still carries hydrogen sulfide, so that a monitoring instrument is needed to monitor the desulfurized hydrogen sulfide, and when the desulfurized hydrogen sulfide still does not meet the content standard of the hydrogen sulfide, the whole natural gas conveying system is immediately closed to overhaul the desulfurization station. The monitoring instrument mainly monitors the content of hydrogen sulfide. Optionally, when the monitoring instrument monitors that the content of hydrogen sulfide in the natural gas exceeds the standard, an alarm is given to station operators.
Before the further step 1, the method further comprises:
gathering the sulfur-containing natural gas of a plurality of gas wells into a strand of low-potential sulfur natural gas in a gathering station gathering pipe 1.
In the above embodiment, when processing low latent sulfur natural gas, a plurality of natural gas wells are collected into one low latent sulfur natural gas stream by the manifold 1 and introduced into the gas-liquid separator 2. The embodiment can realize the simultaneous treatment of multiple natural gas wells.
Further, after the step 1, the method further includes:
a first safety valve 12 is arranged on a pipeline at the front end of an air inlet of a gathering pipe 1 of the gas gathering station, and a second safety valve 13 is arranged at the air inlet of the gas-liquid separation device 2;
the safety exhaust port of the first safety valve 12 is communicated with the air inlet of the flash liquid separation device through an emptying header pipe, and the safety exhaust port of the second safety valve 13 is communicated with the air inlet of the flash liquid separation device through the emptying header pipe;
and (3) conveying the gas separated from the flash liquid separating device into a blow-down torch for combustion treatment through a pipeline between the flash liquid separating device and an air inlet of the blow-down torch, wherein the blow-down torch is arranged outside the station.
In the above embodiment, in order to prevent the natural gas from damaging the equipment when the natural gas enters the gas-liquid separation treatment due to the excessive air pressure at the manifold 1 of the gas gathering station, the first safety valve 12 and the second safety valve 13 are respectively installed at the gas inlet of the gas gathering station manifold 1 and the gas inlet of the gas-liquid separation device 2, so as to prevent the highest pressure on the pipeline at the front end of the gas inlet of the manifold 1 of the gas gathering station from damaging the pipeline; and avoid gas-liquid separation device 2 inlet port department atmospheric pressure to lead to the too big problem that causes equipment damage of natural gas pressure, when pressure was too big, the relief valve discharged the natural gas release pressure in safe vent department, and the natural gas released leads to flash distillation liquid separation device and carries out combustion processing through the blow-down torch by the blow-down house steward.
Further, in the step 3, the delivering the natural gas desulfurized in the liquid desulfurization device 4 to the downstream is specifically that the natural gas desulfurized in the liquid desulfurization device 4 is pressurized in the pressurization device 5, and the pressurized natural gas is metered and delivered to the downstream through the metering device 6.
In the above embodiment, in winter, in order to ensure the gas transmission pressure, the natural gas desulfurized by the liquid desulfurizer 4 needs to enter the pressurizer 5 for pressurization, and then is metered by the metering device 6 for outward transmission. In summer, the water can be directly metered by the metering device 6 without pressurization and then is output.
Further, after the step 3, the method further includes:
and 4, respectively sending the liquid separated in the gas-liquid separation device 2, the supercharging device 5 and the liquid desulphurization device 4 into a flash evaporation liquid separation device 7 for flash evaporation, sending the separated liquid into a buried water sewage device 8, and sending the separated gas into a blow-down torch for combustion.
In the above embodiment, in order to ensure the transportation and treatment of sewage, the liquid separated in the gas-liquid separation device 2, the pressurization device 5 and the liquid desulfurization device 4 needs to be sent to the flash evaporation liquid separation device for flash evaporation; specifically, the separated liquid enters a flash liquid separating device 7 through a pipeline 9, the liquid is flashed through the flash liquid separating device 7, the separated liquid enters an underground sewage tank 8, and the liquid level of the underground sewage tank 8 reaches a high liquid level and is periodically transported to downstream for treatment through a tank truck.
Further, after the step 4, the method further includes:
and 5, installing a first valve 14 on a liquid inlet of the flash liquid separating device 7, installing a bypass pipeline between a liquid inlet end of the first valve 14 of the flash liquid separating device 7 and the underground water sewage device 8, and installing a second valve 15 on the bypass pipeline.
In the above-mentioned embodiment, when liquid device goes wrong in the flash distillation, in order not to influence the production of natural gas, divide the feed liquor that liquid device can be used to keep apart or open the flash distillation in first valve 14 of liquid device's inlet installation, and install the bypass line between the feed liquor of first valve 14 and bury water sewage device, can directly carry the liquid that separates among gas-liquid separation device 2, supercharging device 5 and the liquid desulphurization unit 4 to bury in the water sewage device with ground in the short time and save when liquid device goes wrong in the flash distillation, wherein first valve 14 and second valve 15 are the on-off valve, and the valve can be ball valve or butterfly valve.
Further, after the step 5, the method further includes:
and 6, installing a liquid level measuring device in the underground sewage tank 8, and periodically carrying the liquid level in the underground sewage tank 8 to the downstream by a tank truck for treatment after the liquid level reaches a high liquid level.
In the above embodiment, the liquid level measuring device measures the liquid level of the underground sewage tank 8, and prevents the liquid stored in the underground sewage tank 8 from overflowing.
Further, in the step 3, the natural gas desulfurized in the liquid desulfurization device 4 is pressurized in the pressurization device 5, and the pressurized natural gas is metered and delivered to the downstream through the metering device 6, specifically, the natural gas desulfurized in the liquid desulfurization device 4 is pressurized in the pressurization device 5 in winter, and the natural gas pressurized to 3.5 mpa is metered and delivered to the downstream through the metering device 6; in summer, the natural gas desulfurized in the liquid desulfurization device 4 is metered by the metering device 6 and directly conveyed to the downstream.
In the above embodiment, in this embodiment, the natural gas pressurization and non-pressurization in this embodiment mainly control the flow direction of the natural gas by using a valve, and because the operation conditions in winter and summer are different, pressurization in winter and summer are not needed; in winter, the natural gas needs to be increased and pressurized before being conveyed; in summer, the air pressure can be directly conveyed to downstream for conveying, and the pressure control in different periods in winter and summer can effectively ensure the conveying of natural gas. The natural gas is pressurized to 3.5 MPa in winter, so that the transportation of the natural gas in winter can be effectively ensured.
Further, step 1 is preceded by:
the natural gas collected by the collecting pipe 1 is in butt joint with the gas inlet of the gas-liquid separation device 2, the gas outlet of the gas-liquid separation device 2 is in butt joint with the gas inlet of the heating device 3, the gas outlet of the heating device 3 is in butt joint with the gas inlet of the liquid desulfurization device 4, the gas outlet of the liquid desulfurization device 4 is in butt joint with the conveying pipeline, after the installation, gas leakage detection is carried out on the connecting part of each component, wherein a desulfurizer storage tank 11 is installed outside the liquid desulfurization device 4, the desulfurizer storage tank 11 is used for stably providing a desulfurizer for the liquid desulfurization device 4, a metering device 6 is installed between the liquid desulfurization device 4 and the conveying pipeline, and the natural gas sent out by the liquid desulfurization device 4 is metered by the metering device 6 and then is conveyed by the conveying pipeline.
In the above embodiment, the components are connected and mounted, and then the gas leakage inspection is performed, so that the stability of the processing components and the safety of a natural gas station are ensured.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the present embodiment are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions related to "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Technical solutions between various embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (10)
1. A station desulfurization device for low-potential sulfur natural gas is characterized by comprising: gas-liquid separation device (2), heating device (3) and liquid desulphurization unit (4), the inlet end of gas-liquid separation device (2) admits air through the pipeline, and the end of giving vent to anger of gas-liquid separation device (2) is connected through the inlet end of pipeline through heating device (3) and liquid desulphurization unit (4), and the end of giving vent to anger of liquid desulphurization unit (4) is through pipeline defeated gas.
2. The station yard desulfurization device for low latent sulfur natural gas as claimed in claim 1, characterized in that the gas outlet end of the liquid desulfurization device (4) is provided with a hydrogen sulfide detection alarm device and a metering device (6), the gas outlet end of the liquid desulfurization device (4) is fed with gas through the metering device (6), and the hydrogen sulfide detection alarm device is connected in parallel with the gas outlet end of the liquid desulfurization device (4).
3. The station desulphurization device for the low latent sulfur natural gas according to claim 1, wherein the gas inlet end of the gas-liquid separation device (2) is provided with a manifold (1), and the gas inlet end of the gas-liquid separation device (2) is connected with a plurality of pipelines through the manifold (1).
4. The station desulfurization device for the low-potential sulfur natural gas as claimed in claim 1, wherein a desulfurizer storage tank (11) is arranged outside the liquid desulfurization device (4), and the desulfurizer storage tank (11) is connected with the liquid desulfurization device (4) through a pipeline.
5. A station desulfurization device for low-potential sulfur natural gas according to claim 3, characterized in that the gas outlet end of the liquid desulfurization device (4) is provided with a pressurization device (5) and a metering device (6), and the gas outlet end of the liquid desulfurization device (4) is fed with gas through the pressurization device (5) and the metering device (6).
6. The station desulphurization device for the low-sulfur laten natural gas according to claim 5, wherein the gas-liquid separation device (2) is further provided with a flash liquid separation device (7), a buried water sewage device (8) and a blow-down torch outside the station, the liquid outlet of the gas-liquid separation device (2), the liquid outlet of the liquid desulphurization device (4) and the liquid outlet of the pressurization device (5) are respectively connected with the flash liquid separation device (7) through pipelines, the liquid outlet of the flash liquid separation device (7) is connected with the buried water sewage device (8), and the gas outlet end of the flash liquid separation device (7) is connected with the blow-down torch.
7. The station desulfurization device for the low latent sulfur natural gas according to claim 6, characterized in that a discharge header pipe (10) and a second safety valve are arranged between the gas inlet end of the gas-liquid separation device (2) and the flash liquid separation device (7), the gas inlet end of the gas-liquid separation device (2) is supplied with gas through the second safety valve, and the safety gas outlet of the second safety valve is connected with the flash liquid separation device (7) through the discharge header pipe (10).
8. The station desulfurization device for the low latent sulfur natural gas according to claim 7, characterized in that a first safety valve is arranged on a pipeline at the gas inlet end of the gas collecting pipe (1), and a safety exhaust port of the first safety valve is connected with the flash liquid separation device (7) through a discharge main pipe (10).
9. The station desulfurization device for the low-potential sulfur natural gas as claimed in claim 6, characterized in that a first valve and a bypass pipeline are arranged at an inlet of the flash liquid separation device (7), the flash liquid separation device (7) is connected with the buried sewage device (8) through the first valve and the bypass pipeline, and a second valve is arranged on the bypass pipeline.
10. The station site desulfurization apparatus for low latent sulfur natural gas according to claim 6, characterized in that a liquid level measuring device is provided in said buried sewage tank (8).
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| CN201920603922.XU CN209872888U (en) | 2019-04-28 | 2019-04-28 | Station desulfurization device for low-potential sulfur natural gas |
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| CN201920603922.XU CN209872888U (en) | 2019-04-28 | 2019-04-28 | Station desulfurization device for low-potential sulfur natural gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109971522A (en) * | 2019-04-28 | 2019-07-05 | 西安长庆科技工程有限责任公司 | A kind of yard desulfurizer of low latent sulphur natural gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109971522A (en) * | 2019-04-28 | 2019-07-05 | 西安长庆科技工程有限责任公司 | A kind of yard desulfurizer of low latent sulphur natural gas |
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Effective date of registration: 20201102 Address after: 710018 Shaanxi province Xi'an Weiyang road Fengcheng four Changqing building Patentee after: XI'AN CHANGQING TECHNOLOGY ENGINEERING Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 710018 Shaanxi city of Xi'an province Fengcheng Weiyang District four building 1809 Changqing Road Patentee before: XI'AN CHANGQING TECHNOLOGY ENGINEERING Co.,Ltd. |
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