阅读说明：本技术 一种井口除硫系统及其喷淋除硫装置 (Wellhead desulfurization system and spraying desulfurization device thereof ) 是由 罗曦 刘玉祥 周舰 王锦昌 周瑞立 林新宇 何问仁 王萍 袁本福 杨易骏 于 2019-08-27 设计创作，主要内容包括：本发明涉及一种井口除硫系统及其喷淋除硫装置。喷淋除硫装置包括壳体和喷淋单元,壳体具有进气口、出气口以及用于供除硫剂进入的药剂入口,进气口的内端和出气口内端之间具有一定的夹角；喷淋单元,朝向进气口的内端喷淋的进气喷嘴以及朝向出气口的内端喷淋的出气喷嘴；由出气喷嘴喷出的除硫剂在混合通道中与硫化氢气体充分混合。进气喷嘴对气体进行初次除硫,出气喷嘴对气体进行二次除硫,进一步的降低气体中的含硫量,喷淋增大进入壳体内部的除硫剂流量,天然气流经夹角后处于紊流状态,使除硫剂与硫化氢气体充分混合,在提高除硫剂流量的同时保证了除硫剂充分反应,在气体流量大或者气体中的硫化氢气体含量高时仍然能够高效的去除硫化氢。(The invention relates to a wellhead sulfur removal system and a spraying sulfur removal device thereof. The spraying sulfur removal device comprises a shell and a spraying unit, wherein the shell is provided with a gas inlet, a gas outlet and a medicament inlet for the sulfur removal agent to enter, and a certain included angle is formed between the inner end of the gas inlet and the inner end of the gas outlet; the spraying unit comprises an air inlet nozzle spraying towards the inner end of the air inlet and an air outlet nozzle spraying towards the inner end of the air outlet; the sulfur removing agent sprayed out from the gas outlet nozzle is fully mixed with the hydrogen sulfide gas in the mixing channel. The air inlet nozzle carries out primary desulfurization to gas, and the air outlet nozzle carries out secondary desulfurization to gas, and further reduction contains sulphur content in the gas, sprays the increase and gets into the inside desulfurizing agent flow of casing, and the natural gas is in turbulent state after flowing through the contained angle, makes desulfurizing agent and hydrogen sulfide gas intensive mixing, has guaranteed the sufficient reaction of desulfurizing agent when improving the desulfurizing agent flow, still can the efficient get rid of hydrogen sulfide when the hydrogen sulfide gas content in the gas flow is big or gas is high.)

1. Spraying desulphurization unit, its characterized in that includes:

the shell is provided with an air inlet communicated with the air inlet pipeline, an air outlet communicated with the exhaust pipeline and a medicament inlet for the sulfur removing agent to enter, and a certain included angle is formed between the inner end of the air inlet and the inner end of the air outlet;

the spraying unit is provided with an air inlet nozzle which is arranged at the included angle and sprays towards the inner end of the air inlet, and an air outlet nozzle which is arranged at the included angle and sprays towards the inner end of the air outlet.

2. The spray sulfur removal device of claim 1 further comprising a chemical inlet fitting secured to the housing in communication with the chemical inlet, the spray unit being removably connected to the chemical inlet fitting.

3. The spray sulfur removal device of claim 2 wherein a buffer chamber is provided in the air inlet connection for buffering spray pressure.

4. The spray desulfurization device according to claim 1, 2 or 3, wherein a portion between the gas outlet and the gas outlet nozzle of the housing has a mixing channel for thoroughly mixing the desulfurization agent sprayed from the gas outlet nozzle with the hydrogen sulfide gas.

5. The spray sulfur removal device according to claim 4, wherein a helical blade is provided on the inner wall surface of the mixing channel.

6. A wellhead sulfur removal system, comprising:

a reservoir for storing a desulfurizing agent;

the spraying sulfur removal device is arranged on a natural gas conveying pipeline to remove hydrogen sulfide gas in the natural gas;

the delivery pump is communicated with the liquid storage container and the spraying unit and is used for pumping the desulfurizing agent in the storage container to the spraying unit;

characterized in that the spray desulfurization device is the spray desulfurization device according to any one of claims 1 to 5.

7. A wellhead sulfur removal system according to claim 6, characterized in that the wellhead sulfur removal system further comprises a detection unit for detecting the content of hydrogen sulfide gas in the natural gas flowing through the housing, and a control unit which is in signal connection with the detection unit and controls the spraying amount of the spraying unit according to the content of hydrogen sulfide gas.

8. A wellhead sulphur removal system according to claim 6 or claim 7, wherein the wellhead sulphur removal system further comprises a level meter for detecting the level of sulphur removal agent in the reservoir and a control unit in signal connection with the level meter and for supplementing sulphur removal agent to the reservoir according to the level of sulphur removal agent in the reservoir.

Technical Field

The invention relates to a wellhead sulfur removal system and a spraying sulfur removal device thereof.

Background

In the current natural gas exploitation process, because part of hydrogen sulfide gas is usually mixed in the natural gas, the content of the hydrogen sulfide gas is higher in a high-sulfur-content gas well; the hydrogen sulfide gas is corrosive, can corrode equipment and pipelines in the process of exploitation and transportation of natural gas, and even can cause leakage of the natural gas and the hydrogen sulfide gas.

Provide a well head sulphur removal system in the chinese utility model patent of the publication number of authorizing CN208605935U, including the chemical tank that holds the sulphur removal agent, set up the atomizer on natural gas transmission line, carry the plunger pump to the atomizer with the medicament by the chemical tank, carry the medicament to the atomizer in and provide atomizing pressure through the plunger pump and make the sulphur removal agent atomizing blowout, flow through the atomizer when the natural gas that contains hydrogen sulfide gas and react with atomizing sulphur removal agent, thereby detach hydrogen sulfide gas. The system can remove the hydrogen sulfide gas in the natural gas in the process of collecting the natural gas, the reaction speed is high, and the hydrogen sulfide gas removal rate is high.

However, in the above atomizer, the desulfurizing agent needs to be atomized to sufficiently react with the hydrogen sulfide gas, and when the gas flow rate flowing through the atomizer is large or the hydrogen sulfide gas content in the gas is high, the atomizing desulfurizing agent has a small flow rate and a high reaction speed, and once the flow rate of the desulfurizing agent sprayed into the turning part of the atomizer is insufficient to completely remove the hydrogen sulfide gas, the desulfurizing agent needs to be removed again to remove the hydrogen sulfide gas, so that the removal efficiency is low. The corresponding wellhead sulfur removal system using the atomizer is easy to cause the problem of high sulfur removal cost caused by the need of re-sulfur removal during sulfur removal.

Disclosure of Invention

The invention aims to provide a spraying desulphurization device, which is used for solving the problem of low removal efficiency of hydrogen sulfide gas in natural gas in the prior art; meanwhile, the invention also provides a wellhead sulfur removal system, which is used for solving the problem of high sulfur removal cost.

In order to achieve the above object, the spraying desulfurization device according to the present invention comprises:

the shell is provided with an air inlet communicated with the air inlet pipeline, an air outlet communicated with the exhaust pipeline and a medicament inlet for the sulfur removing agent to enter, and a certain included angle is formed between the inner end of the air inlet and the inner end of the air outlet;

the spraying unit is provided with an air inlet nozzle which is arranged at the included angle and sprays towards the inner end of the air inlet, and an air outlet nozzle which is arranged at the included angle and sprays towards the inner end of the air outlet.

The spraying sulfur removal device has the beneficial effects that: the external desulfurizing agent can enter the gas inlet nozzle and the gas outlet nozzle along the agent inlet, gas enters the shell from the gas inlet and flows into the exhaust pipeline communicated with the gas outlet from the gas outlet after passing through an included angle, the gas inlet nozzle facing the gas inflow direction can spray the desulfurizing agent to the gas in the flowing process of the gas, the gas is subjected to primary desulfurization, the gas can be converted into a turbulent flow state when flowing through an included angle, the desulfurizing agent is sprayed into the gas from the gas outlet nozzle again at the moment, the gas is subjected to secondary desulfurization, the sulfur content in the gas is further reduced, because the gas is in the turbulent flow state at the moment, hydrogen sulfide in the gas can be fully mixed and reacted with the desulfurizing agent, compared with the atomizing form of the desulfurizing agent, the spraying can increase the flow of the desulfurizing agent entering the shell, the flow of the desulfurizing agent is improved, and the sufficient reaction of the desulfurizing agent is ensured, the hydrogen sulfide can be removed efficiently when the gas flow is large or the hydrogen sulfide gas content in the gas is high.

Further, spray sulphur removal device still including fixing on the casing and advancing the medicine joint with medicament entry intercommunication, spray unit releasable connection on advancing the medicine joint.

Has the advantages that: the unit setting will spray advances on the medicine joint, advances the medicine joint and is connected with the casing, is convenient for spray the installation and the fixed of unit, advances the medicine joint with spray unit releasable connection, can take off when spraying unit damage or nozzle and block up and spray the unit and maintain or change, is favorable to reducing maintenance cost.

Furthermore, a buffer cavity for buffering the spraying pressure is arranged in the air inlet joint.

Has the advantages that: the buffering cavity is arranged in the air inlet joint, so that the pressure of the medicament is buffered, and the medicament can be sprayed out from the nozzle more uniformly.

Furthermore, a mixing channel for fully mixing the sulfur removing agent sprayed by the gas outlet nozzle and the hydrogen sulfide gas is arranged between the gas outlet of the shell and the gas outlet nozzle.

Has the advantages that: the mixing channel is arranged on the shell, so that the hydrogen sulfide gas is effectively removed in the shell, and the hydrogen sulfide gas is prevented from corroding the exhaust pipeline communicated with the air outlet.

Further, a helical blade is arranged on the inner wall surface of the mixing channel.

Has the advantages that: the spiral blades are arranged, so that the desulfurizing agent and the hydrogen sulfide can be mixed more uniformly, and the desulfurizing effect is improved.

The technical scheme of the wellhead sulfur removal system is that the wellhead sulfur removal system comprises:

a reservoir for storing a desulfurizing agent;

the spraying sulfur removal device is arranged on a natural gas conveying pipeline to remove hydrogen sulfide gas in the natural gas;

the delivery pump is communicated with the liquid storage container and the spraying unit and is used for pumping the desulfurizing agent in the storage container to the spraying unit;

the spraying sulfur removal device comprises a shell and a spraying unit; the shell is provided with an air inlet communicated with the air inlet pipeline, an air outlet communicated with the exhaust pipeline and a medicament inlet for the sulfur removing agent to enter, and a certain included angle is formed between the inner end of the air inlet and the inner end of the air outlet; the spraying unit is provided with an air inlet nozzle which is arranged at an included angle and sprays towards the inner end of the air inlet, and an air outlet nozzle which is arranged at the included angle and sprays towards the inner end of the air outlet.

The wellhead sulfur removal system has the advantages that the sulfur removal agent in the storage container enters the gas inlet nozzle and the gas outlet nozzle along the agent inlet under the action of the conveying pump, the conveying pump also provides spraying pressure, gas enters the shell from the gas inlet and flows into the exhaust pipeline communicated with the gas outlet from the gas outlet after passing through an included angle, the gas inlet nozzle facing the gas inflow direction can spray the sulfur removal agent to the gas in the flowing process of the gas to perform primary sulfur removal on the gas, the gas can be converted into a turbulent flow state when flowing through the included angle, the sulfur removal agent is sprayed into the gas from the gas outlet nozzle again at the moment to perform secondary sulfur removal on the gas, the sulfur content in the gas is further reduced, hydrogen sulfide in the gas can be fully mixed and reacted with the sulfur removal agent due to the fact that the gas is in the turbulent flow state at the moment, compared with the atomizing form of the sulfur removal agent, the spraying can increase the flow rate of the sulfur removal agent entering the shell, the desulfurizing agent can be fully reacted while the flow of the desulfurizing agent is improved, hydrogen sulfide can be efficiently removed when the gas flow is large or the content of hydrogen sulfide gas in gas is high, the content of hydrogen sulfide in gas can be directly reduced to a set range in a spraying desulfurizing device, the desulfurizing is not needed again, and the desulfurizing cost is reduced.

Further, spray sulphur removal device still including fixing on the casing and advancing the medicine joint with medicament entry intercommunication, spray unit releasable connection on advancing the medicine joint.

Has the advantages that: the unit setting will spray advances on the medicine joint, advances the medicine joint and is connected with the casing, is convenient for spray the installation and the fixed of unit, advances the medicine joint with spray unit releasable connection, can take off when spraying unit damage or nozzle and block up and spray the unit and maintain or change, is favorable to reducing maintenance cost.

Furthermore, a buffer cavity for buffering the spraying pressure is arranged in the air inlet joint.

Has the advantages that: the buffering cavity is arranged in the air inlet joint, so that the pressure of the medicament is buffered, and the medicament can be sprayed out from the nozzle more uniformly.

Furthermore, a mixing channel for fully mixing the sulfur removing agent sprayed by the gas outlet nozzle and the hydrogen sulfide gas is arranged between the gas outlet of the shell and the gas outlet nozzle.

Has the advantages that: the mixing channel is arranged on the shell, so that the hydrogen sulfide gas is effectively removed in the shell, and the hydrogen sulfide gas is prevented from corroding the exhaust pipeline communicated with the air outlet.

Further, a helical blade is arranged on the inner wall surface of the mixing channel.

Has the advantages that: the spiral blades are arranged, so that the desulfurizing agent and the hydrogen sulfide can be mixed more uniformly, and the desulfurizing effect is improved.

Furthermore, the wellhead sulfur removal system also comprises a detection unit and a control unit, wherein the detection unit is used for detecting the content of the hydrogen sulfide gas in the natural gas flowing through the shell, and the control unit is in signal connection with the detection unit and controls the spraying amount of the spraying unit according to the content of the hydrogen sulfide gas.

Has the advantages that: the control unit and the detection unit are arranged to automatically control the flow of the spraying unit, the automation degree is high, and the labor cost can be reduced.

Further, the wellhead sulfur removal system also comprises a liquid level meter and a control unit, wherein the liquid level meter is used for detecting the liquid level of the sulfur removal agent in the liquid storage container, and the control unit is in signal connection with the liquid level meter and supplies the sulfur removal agent to the liquid storage container according to the liquid level of the sulfur removal agent in the liquid storage container.

Has the advantages that: set up level gauge and detecting element automatic control stock solution container's liquid level, degree of automation is high, can reduce the human cost.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a spray desulfurization unit according to the present invention;

FIG. 2 is a flow diagram of an embodiment of the wellhead sulfur removal system of the present invention;

wherein: 1-wind-solar complementary power supply unit, 11-fan, 12-solar panel, 13-relay; 2-a liquid storage tank, 21-a liquid level meter, 22-a medicine adding port, 23-an emptying valve and 24-a sewage draining ball valve; 3-plunger pump, 31-control valve; 4-a filter; 5-spraying sulfur removal device, 51-shell, 511-air inlet, 512-air outlet, 513-helical blade, 52-medicine inlet joint, 521-check valve, 522-stop valve, 523-buffer cavity, 53-spraying unit, 531-air inlet nozzle and 532-air outlet nozzle; 6-gas production tree; 7-natural gas station.

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings.

In the embodiment of the spraying desulfurization device, the spraying desulfurization device is connected to a pipeline for conveying natural gas and is used for removing hydrogen sulfide gas in the natural gas. As shown in fig. 1, the device comprises a housing 51, wherein one end of the housing 51 is an air inlet 511 fixedly connected with an air inlet pipeline through a flange, one end is an air outlet 512 communicated with an air outlet pipeline, and the other end is a medicament inlet communicated with a storage container for storing a sulfur removing agent.

In this embodiment, the air inlet 511 of the shell 51 is connected to a gas production pipeline led out from a gas production tree, the air inlet pipeline is a gas production pipeline, the air outlet 512 is connected to a pipeline leading to a natural gas station, and the exhaust pipeline is a pipeline connecting the shell 51 to the natural gas station. Natural gas with hydrogen sulfide gas produced in a gas well enters the shell 51 through the gas inlet 511 and is discharged into the natural gas station through the gas outlet 512. An included angle is formed between the air inlet 511 and the air outlet 512, so that the direction of the air flow can be changed, and meanwhile, the air flow is in a turbulent state after passing through the included angle, and is convenient to mix with the desulfurizing agent. The axis of the air inlet 511 and the axis of the air outlet 512 form a right angle in this embodiment. The included angle may be other angles in other embodiments.

The spraying sulfur removal device further comprises a medicine inlet joint 52, one end of the medicine inlet joint 52 is installed at the medicine inlet of the shell 51 through a flange bolt, the other end of the medicine inlet joint 52 is communicated with a storage container, and a check valve 521 and a stop valve 522 are sequentially arranged on the medicine inlet joint 52 along the inflow direction of the medicine. The chemical inlet joint 52 is also provided with a buffer cavity 523, the desulfurizing agent enters the buffer cavity 523 for buffering, so that the change of the flow of the desulfurizing agent entering the shell 51 caused by pressure fluctuation is avoided, and the desulfurizing agent uniformly enters the shell 51.

A spraying unit 53 is further fixed on the end face of the end of the chemical inlet joint 52 connected with the housing 51 through a bolt, the spraying unit 53 is provided with a chemical inlet channel communicated with the buffer chamber 523, the spraying unit 53 is further provided with two nozzles communicated with the chemical inlet channel, one of the two nozzles is an air inlet nozzle 531 facing the air inlet 511 and spraying towards the air inflow direction, and the other one is an air outlet nozzle 532 facing the air outlet 512 and spraying along the air outflow direction. The number of the inlet nozzles 531 and the number of the outlet nozzles 532 in this embodiment are one, and in other embodiments, the number of the inlet nozzles may be two or more, or the number of the outlet nozzles may be two or more.

In the spraying sulfur removal device, the shell 51 is arranged at a wellhead and is communicated with a gas production pipeline of a gas production tree, so that hydrogen sulfide gas doped in natural gas can be removed during gas production. In other embodiments, the spray desulfurization device can also be directly connected with a gas production valve on a gas production tree.

Because the space in the shell 52 is smaller, the spraying unit 53 is installed on the chemical inlet joint 52, when the chemical inlet joint 52 is fixed with the shell 51, two nozzles of the spraying unit 52 are just positioned in the shell 52, so that the installation of the spraying unit 53 is convenient, at the moment, the whole spraying unit 52 is positioned in the shell, and the volume of the whole spraying sulfur removal device is smaller. In other embodiments, the chemical inlet joint is not arranged, the spraying unit is provided with a flange surface and is fixed at the chemical inlet through a bolt, and the spraying unit is provided with a connecting pipe protruding out of the shell and communicated with a storage container for storing the chemical; or an internal thread is arranged at the medicament inlet, an external thread is arranged on the main body of the spraying unit, and the spraying unit is directly assembled at the medicament inlet in a thread matching mode.

The part of the shell 51 between the air outlet 512 and the air outlet nozzle 532 is provided with a mixing channel for gas circulation, the mixing channel can enable the hydrogen sulfide gas to fully react with the sulfur removal agent, and the mixing channel is arranged inside the shell, so that the corrosion of the hydrogen sulfide gas in the exhaust pipeline caused by the reaction of the hydrogen sulfide gas in the exhaust pipeline is avoided. In other embodiments, the mixing channel can be arranged on the exhaust pipeline communicated with the air outlet, so that the size of the spraying sulfur removal device can be reduced, and the compactness of the whole device can be improved.

The mixing channel is also internally provided with a helical blade 513, and the helical blade 513 can ensure that the hydrogen sulfide gas and the sulfur removing agent are mixed more uniformly, thereby improving the removal effect of the hydrogen sulfide gas. In other embodiments, baffles may be disposed in the mixing channel in a staggered arrangement to enhance the turbulence of the air flow.

The spraying unit 53 is detachably connected to the chemical inlet joint 52 through a bolt, and the chemical inlet joint 52 is also connected with the shell 51 through a bolt, so that the spraying unit 53 can be taken down for cleaning or replacement when a spray head of the spraying unit 53 is blocked or damaged, and the maintenance cost is reduced. In other embodiments, the spraying unit can also be directly connected with the medicine inlet joint through threads; or the spraying unit and the chemical feeding joint are arranged into a whole, so that the structure of the whole spraying sulfur removal device can be simplified.

The chemical inlet joint 53 in this embodiment is provided with the buffer chamber 523, and the desulfurizing agent can be buffered after entering the buffer chamber 523, so that the desulfurizing agent sprayed by the spray head is more uniform, and the desulfurizing effect is improved. In other embodiments, a buffer cavity may not be provided on the drug inlet joint, and at this time, a pressure stabilizing tank may be provided in the storage container for storing the drug, or a pressure stabilizing pump may be connected to the pipeline for delivering the drug, so as to realize stable spraying of the nozzle.

The gas inlet nozzle 531 and the gas outlet nozzle 532 make the desulfurizing agent uniformly dispersed and contact with the hydrogen sulfide gas by depending on the pressure in an external pipeline, and the content of the hydrogen sulfide gas in the natural gas can be greatly reduced by primary desulfurizing through the gas inlet nozzle 531 and secondary desulfurizing through the gas outlet nozzle 532, so that the natural gas reaches the use standard of the natural gas and can be directly conveyed to a natural gas station for storage.

When the spraying sulfur removal device is used, the shell 51 is firstly installed on the corresponding pipeline, then the spraying unit 53 is fixed on the medicine inlet joint 52, the buffer cavity 523 is communicated with the medicine inlet channel of the spraying unit 53, the spraying unit 53 is inserted into the medicine inlet of the shell 51, one end of the medicine inlet joint 52 is fixed on the shell 51 by using a bolt, the other end of the medicine inlet joint 52 is connected with the pipeline for conveying the sulfur removal agent, and the assembly of the whole spraying sulfur removal device is completed.

Under the pressure of the pipeline of carrying the desulfurization agent, the desulfurization agent gets into the buffering in the cushion chamber 523 and cushions, then spout along the nozzle, when gas inflow casing 51 is inside, gas inlet nozzle 531 towards gaseous inflow direction can spray the desulfurization agent to gas, carry out first desulfurization to gas, when gas is discharged by the gas outlet, gas outlet nozzle 532 can spray the desulfurization agent again in to gas, carry out secondary desulfurization to gas, further reduce the sulphur content in the gas, the casing sets up at the well head, gas production tree with the well head or the gas production pipeline that leads out with the gas production tree link to each other, just can carry out the desulfurization to gas when gathering gas, need not close the well and pour into the desulfurizer into to the well, the collection efficiency has been improved.

Compare the atomizing form of desulfurizing agent, spray and to increase the inside desulfurizing agent flow that gets into the casing, the natural gas can wrap the desulfurizing agent to the mixing channel in at the in-process that flows simultaneously, the natural gas is in the turbulent state after flowing the contained angle, can carry out abundant mixing and reaction with the desulfurizing agent in the mixing channel, guaranteed the desulfurizing agent can fully react when improving the desulfurizing agent flow, the problem that the hydrogen sulfide gas in the natural gas that causes because of the little not enough of atomizing desulfurizing agent flow exceeds standard has been solved among the prior art to the problem of having solved because of the gaseous hydrogen sulfide gas that causes of hydrogen sulfide completely.

In the embodiment of the wellhead sulfur removal system, as shown in fig. 2, the wellhead sulfur removal system comprises a storage container, a spraying sulfur removal device 5, a delivery pump 3, a signal acquisition unit and a control unit.

The spraying sulfur removal device has the same structure as the spraying sulfur removal device in the embodiment of the spraying sulfur removal device, and the description is not repeated.

The storage container is a liquid storage tank 2, a space for containing the desulfurizing agent is arranged in the storage container, a chemical adding port 22 for supplementing the desulfurizing agent and an emptying valve 23 for keeping the pressure balance inside and outside the tank body are arranged at the top of the liquid storage tank 2, the emptying valve 23 is connected with the bottom of the liquid storage tank 2, a sewage discharge pipeline is connected with a sewage discharge ball valve 24, and when impurities in the liquid storage tank 2 are contained, the sewage discharge ball valve 24 is arranged on the sewage discharge pipeline. A liquid level meter 21 is arranged outside the liquid storage tank 2 and used for detecting the liquid level of the desulfurizing agent. The storage container may also be a box in other embodiments.

The sulfur removal agent used in the embodiment is a compound solution of triazine sulfur removal agent, methanol, foam scrubbing agent and water, wherein the concentration of the triazine sulfur removal agent is 10-40%, the concentration of the methanol is 10-20%, the concentration of the foam scrubbing agent is 0.3-0.5%, and the balance is water, so that hydrogen sulfide gas can be effectively removed.

The liquid storage tank 2 is connected with the delivery pump 3 through a pipeline, the delivery pump 3 is a plunger pump, the pipeline between the liquid storage tank 2 and the delivery pump 3 is provided with an adjusting valve 31, the specific adjusting valve 31 is a ball valve, the outlet of the delivery pump 2 is provided with a filter 4, the filtering precision of the filter is 100-plus-300, impurities in the sulfur removal agent can be effectively filtered, the impurities are prevented from blocking a nozzle in the spraying sulfur removal device 5, and the filtered sulfur removal agent enters the spraying sulfur removal device 5 to remove sulfur from natural gas.

The gas inlet 511 of the spraying desulfurization device 5 is connected with the gas outlet of the gas production tree 6 through a pipeline, receives natural gas produced in a gas well, and the natural gas subjected to desulfurization by the spraying desulfurization device 5 reaches the standard of entering the station and is directly stored in the natural gas station 7 connected with the gas outlet 512.

The wellhead sulfur removal system in this embodiment still includes the signal acquisition unit, the liquid level signal in the liquid storage pot 2 and the content of hydrogen sulfide in the natural gas through the casing are gathered to the signal acquisition unit, and in signal transmission to the control unit who will gather, the control unit includes relay 13, the control valve of relay 13 control dosing mouth 22 department in through the control unit, realize the automatic medicine of liquid storage pot 2, the aperture of hydrogen sulfide gas's content control governing valve 31 in the natural gas according to gathering, thereby the flow of the sulfur removal agent in the control entering casing 51, it is reasonable to realize to the fluctuation of hydrogen sulfide content in the gas well, the effect of adding medicine accurate sulfur removal is reached, prevent the waste of sulfur removal agent, whole process can realize automaticly, the human cost is reduced.

In the embodiment, the wind and light complementary power supply unit 1 is adopted to provide electric energy for the whole system, the wind and light complementary power supply unit 1 comprises the fan 11 and the solar panel 12, power can be supplied for the whole wellhead sulfur removal system in different environments, and the wind and light complementary power supply unit is used for gas wells which are relatively dispersed or are not matched with the wellhead.

The wellhead sulfur removal system in the embodiment also comprises an emergency cut-off protection unit, and when a plunger pump in the wellhead sulfur removal system stops working or a liquid storage tank does not contain a medicament, a circuit can be cut off in time, so that the safe operation of the system is ensured.

In order to facilitate the installation and the movement of the wellhead desulfurization system, all parts of the wellhead desulfurization system are fixed on a prying plate, so that the wellhead desulfurization system is convenient to be fixedly installed on a wellhead, the whole wellhead desulfurization system is convenient to move, and the desulfurization is carried out on different gas wells.

When the wellhead sulfur removal system is used, the whole system is fixed at the wellhead of a gas well in a skid-mounted manner, natural gas collected from a gas production tree 6 is introduced into a shell 51, a plunger pump is started to pump a sulfur removal agent in a liquid storage tank into a spraying sulfur removal device 5 and buffer the sulfur removal agent in a buffer cavity 523, and the plunger pump forms a certain injection pressure for spraying the sulfur removal agent along a spray head, so that the natural gas can be subjected to primary sulfur removal through the spraying of an air inlet nozzle 531, and the content of hydrogen sulfide in the natural gas is reduced to 50-100 ppm; when the natural gas flows out, the gas outlet nozzle 532 carries out secondary desulfurization on the natural gas subjected to primary desulfurization, the natural gas and the desulfurizing agent are fully mixed under the action of the helical blade 513, the content of hydrogen sulfide in the natural gas is reduced to be below 13ppm, the entering standard is reached, the gas-liquid separation is carried out on the desulfurized natural gas in the natural gas station 7, byproducts obtained by the reaction of hydrogen sulfide gas and the desulfurizing agent are removed, and the purified natural gas is directly transported out after entering the station through dehydration and dealkylation.

The automatic chemical feeding of the liquid storage tank 2, the size of the spraying flow and the protection unit can be automatically adjusted according to the hydrogen sulfide content in the natural gas in the whole process, the automation degree is high, the desulfurization can be realized while gas production, the well closing, the well killing and the injection of the desulfurizing agent into the well are not needed, the gas production efficiency is improved, the labor cost is reduced, and the economic benefit of the gas well is improved.

The natural gas is in the turbulent state after flowing through the contained angle, can carry out abundant mixing and reaction with the desulfurizing agent in the mixing passage, guaranteed that the desulfurizing agent can fully react when improving the desulfurizing agent flow, still can the efficient get rid of the hydrogen sulfide when the hydrogen sulfide gas content in the gas flow is big or gas is high, can directly reduce the hydrogen sulfide content in the gas to the settlement within range in spraying the sulphur removal device, need not remove sulphur again, reduced the sulphur removal cost.