CN213760608U - Remove foam system of sulphur-containing natural gas ordinary pressure desulfurizing tower - Google Patents

Abstract

The utility model discloses a foam removing system of a natural gas normal pressure desulfurizing tower, which comprises a vacuum system, a bubble absorbing pipe and a negative pressure separating box, wherein the negative pressure separating box is communicated with the normal pressure desulfurizing tower through the bubble absorbing pipe, the connecting part of the bubble absorbing pipe and the normal pressure desulfurizing tower is positioned at the foam gathering part in the normal pressure desulfurizing tower, the vacuum system is communicated with the negative pressure separating box through a vacuum pipe, the vacuum system is added to vacuumize the negative pressure separating box, so that the air pressure of the negative pressure separating box is lower than that of the normal pressure desulfurizing tower, under the action of the vacuum system, the negative pressure separating box can absorb the foam in the normal pressure desulfurizing tower into the negative pressure separating box, the foam can be broken into liquid under the action of pressure difference, thereby achieving the purposes of continuously absorbing the foam in the normal pressure desulfurizing tower and breaking the foam, namely, the technical effect of processing the foam in the normal pressure desulfurizing tower is realized, the whole process does not need manual intervention, the continuous working time of the normal pressure desulfurizing tower is effectively prolonged, the solid content in the desulfurization solution is reduced, the desulfurization effect of the desulfurization solution is improved, and the production cost is reduced.

Description

Remove foam system of sulphur-containing natural gas ordinary pressure desulfurizing tower

Technical Field

The utility model relates to a natural gas production technical field especially relates to a contain foam system that removes of sulphur natural gas ordinary pressure desulfurizing tower.

Background

Natural gas typically contains CO2, H2S, and organic sulfur compounds, which are also commonly referred to as acid gases. Therefore, in the production of natural gas, the acid gas content of the gas must be removed to the specifications required by the standards. The existing common desulfurization solution deacidification method is adopted, namely natural gas is introduced from the bottom of a normal-pressure desulfurization tower, then flows out from the upper part of the normal-pressure desulfurization tower, and meanwhile, the desulfurization solution continuously flows into the normal-pressure desulfurization tower, so that the acid gas in the desulfurization solution is removed by contacting with the natural gas, but in the existing normal-pressure desulfurization tower deacidification process, the desulfurization solution is easy to foam, and the problem of foam aggregation is finally formed.

Therefore, on the station site, the traditional mode of duplex double standby can be adopted, and after the normal pressure desulfurization tower works for a period of time, the shutdown is suspended and the normal pressure desulfurization tower is switched to the standby normal pressure desulfurization tower to continue the natural gas deacidification work. Meanwhile, it is required that station workers climb up to the top position of the atmospheric desulfurization tower and then open the atmospheric desulfurization tower to scoop out the foam manually, but this method has the following problems:

firstly, the top of the normal pressure desulfurizing tower is generally free from protective measures, and workers are very dangerous when standing at the top of the tower;

secondly, the foam area in the normal pressure desulfurizing tower is thicker, the time period of manually scooping out the foam is long, and the labor intensity is high

Thirdly, sulfur paste substances contained in the foam have economic value and cannot be recycled after being directly scooped out;

fourthly, the liquid after the foam is broken can not be recycled, which causes a great amount of loss of the solvent and increases the desulfurization cost.

In view of the above problems, there is a need to solve the foam in the atmospheric desulfurization tower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a natural gas ordinary pressure desulfurizing tower remove foam system, solve the foam treatment problem in the above-mentioned ordinary pressure desulfurizing tower.

In order to realize the purpose, the utility model discloses a technical scheme is: the utility model provides a natural gas ordinary pressure desulfurizing tower's defoaming system, includes vacuum system, inhales bubble pipe and negative pressure separator box, the negative pressure separator box is through inhaling bubble pipe and ordinary pressure desulfurizing tower intercommunication, inhale the foam gathering department that bubble pipe and ordinary pressure desulfurizing tower connecting portion are located ordinary pressure desulfurizing tower, vacuum system passes through vacuum tube and negative pressure separator box intercommunication.

Preferably, the liquid storage tank is internally provided with liquid, the negative pressure separation box is communicated with the liquid storage tank through a pressure stabilizing tube, one end of the pressure stabilizing tube, far away from the negative pressure separation box, is positioned below the liquid level in the liquid storage tank, and the negative pressure separation box is positioned above the liquid storage tank.

Preferably, still include the defoaming subassembly, the defoaming subassembly includes defoaming agent jar and defoaming agent pipe, and the defoaming agent jar passes through defoaming agent pipe and inhales the bubble pipe intercommunication, be equipped with the governing valve of adjustable flow on the defoaming agent pipe.

Preferably, the regulating valve is a needle valve.

Preferably, the connection part of the vacuum pipe and the negative pressure separation box is positioned at the top of the negative pressure separation box.

Preferably, the vacuum tube is transparent.

Preferably, the negative pressure separation box is arranged in an inverted round table shape.

Preferably, the vacuum system is a vacuum pump.

Compared with the prior art, the utility model has the advantages of:

one, through increasing vacuum system to the evacuation of negative pressure knockout drum, can make the inside atmospheric pressure of negative pressure knockout drum be less than the ordinary pressure desulfurizing tower, under vacuum system's effect, the negative pressure knockout drum will absorb foam to the negative pressure knockout drum in the ordinary pressure desulfurizing tower in, and atmospheric pressure in the foam is greater than negative pressure knockout drum internal gas pressure and is under the work of pressure promptly, the foam can be broken into liquid, thereby reach constantly absorb foam and be the broken purpose of foam in the ordinary pressure desulfurizing tower, the technological effect to the processing of foam in the ordinary pressure desulfurizing tower has been realized promptly, and whole journey need not manual intervention and gets rid of the foam, the continuous operation of effective extension ordinary pressure desulfurizing tower is often.

Through increasing stabilivolt and liquid storage pot, stretch into the liquid level of liquid storage pot with stabilivolt, realize negative pressure separator box water seal, the liquid storage pot is less than the setting of negative pressure separator box, make the liquid level in the stabilivolt be located between negative pressure separator box and the liquid storage pot, realize the low vacuum's of negative pressure separator box maintenance, realize that the liquid in the negative pressure separator box can discharge to the liquid storage pot constantly, realize that entire system does not shut down long-time operation, further realize the long-time operation of ordinary pressure desulfurizing tower, the powerful of the labour of having improved traditional manual work and scooping out the foam, unsafe scheduling problem.

And thirdly, the added liquid storage tank can continuously receive the liquid after the foam is broken, so that the recovery of sulfur paste substances contained in the foam and the recovery of a desulfurization solvent are realized, and the overall operation cost of the station is reduced.

Drawings

FIG. 1 is a schematic structural view of example 1;

fig. 2 is a schematic diagram of the defoaming assembly and the structure of the bubble suction tube in example 2.

In the figure: 1. a normal pressure desulfurizing tower; 2. a negative pressure separation tank; 21. a bubble suction pipe; 22. a vacuum tube; 3. a liquid storage tank; 31. a voltage stabilizing tube; 41. a defoamer tank; 42. a defoamer tube; 43. adjusting a valve; 51. a solution bag; 52. a hose; 53. a flow regulator; 54. a needle.

Detailed Description

The present invention will be further explained below.

Example 1:

referring to fig. 1, a foam removing system of a natural gas normal pressure desulfurization tower is shown in the figure, which relates to the technical field of natural gas production, and comprises a vacuum system, a negative pressure separation box 2, a foam suction pipe 21 and a vacuum pipe 22, wherein the vacuum system is communicated with the negative pressure separation box 2 through the vacuum pipe 22, the negative pressure separation box 2 is communicated with the normal pressure desulfurization tower 1 through the foam suction pipe 21, a connection part of the foam suction pipe 21 and the normal pressure desulfurization tower 1 is positioned on the liquid level of a desulfurization solution in the normal pressure desulfurization tower 1, further, a connection part of a defoamer pipe 42 and the normal pressure desulfurization tower 1 is positioned at a foam gathering part in the normal pressure desulfurization tower 1, the negative pressure separation box 2 is vacuumized through the vacuum system, so that the internal air pressure of the negative pressure separation box 2 is lower than the internal air pressure of the normal pressure desulfurization tower 1, and the negative pressure separation box 2 is communicated with the normal pressure desulfurization tower 1, therefore under the action of the vacuum system, the negative pressure separation box 2 can absorb the foam in the normal pressure desulfurizing tower 1 to the negative pressure separation box 2. And because the air pressure in the foam in the negative pressure separation box 2 is larger than the air pressure in the negative pressure separation box 2, namely under the action of the pressure, the foam can be broken into liquid. The aim of continuously absorbing and crushing the foam in the normal pressure desulfurization tower 1 is fulfilled, the technical effect of treating the foam in the normal pressure desulfurization tower 1 is realized, manual intervention is not needed in the whole process to remove the foam, and the continuous work of the normal pressure desulfurization tower 1 is effectively prolonged frequently. Specifically, in the present embodiment, the pressure inside the negative pressure separation tank 2 is not strictly required, and the pressure inside the negative pressure separation tank 2 only needs to be lower than the pressure inside the normal pressure desulfurization tower 1. Thus, under the action of the air pressure difference, the foam in the normal pressure desulfurization tower 1 is pressed into the negative pressure separation box 2 under the action of the air pressure. Therefore, in this embodiment, it is only necessary to maintain the vacuum in the negative pressure separation tank 2 at a low level. The vacuum system can be selected according to the actual situation on site, a vacuum pump can be selected, a rotary-vane vacuum pump can be further selected, the purchase cost is low, and the reconstruction cost can be effectively reduced; or may be directly connected to the vacuum system of the yard. The person skilled in the art can freely select the vacuum system according to the actual situation, and the application is not limited thereto.

Further, since the inside of the negative pressure separation tank 2 needs to continuously maintain the negative pressure state, the negative pressure separation tank 2 is a sealed cavity. So negative pressure separator box 2 will accumulate liquid gradually under the operation of a period of time to the foam that treats breakage accumulates high lifting, and then can make the foam be absorb in the vacuum system, can cause destruction to the vacuum system like this, so in order to slow down the time that the foam is inhaled the vacuum system, in this embodiment, the connecting portion of vacuum tube 22 and negative pressure separator box 2 is located the top of negative pressure separator box 2. In order to solve the problem that liquid in the negative pressure separation tank 2 can be accumulated along with the increase of the extraction time of the negative pressure separation tank 2, so that the accumulation height of foam to be crushed is raised, and the foam is sucked into a vacuum system. The conventional change is that the volume of the negative pressure separation box 2 is large, but the volume of the negative pressure separation box 2 is increased, so that the vacuumizing time of the negative pressure separation box 2 is prolonged, and the use of the implementation is inconvenient. Meanwhile, in the present embodiment, the liquid in the negative pressure separation tank 2 needs to be discharged periodically, but since the negative pressure separation tank 2 is a sealed chamber, it is necessary to close the vacuum system, and further, the effect of continuous treatment cannot be achieved. So as to solve the problem that the negative pressure separation box 2 can not work continuously. The natural gas normal pressure desulfurization tower 1 further comprises a liquid storage tank 3 and a pressure stabilizing tube 31, liquid is arranged in the liquid storage tank 3, specifically, the liquid in the liquid storage tank 3 is tap water, the negative pressure separation tank 2 is communicated with the liquid storage tank 3 through the pressure stabilizing tube 31, one end, far away from the negative pressure separation tank 2, of the pressure stabilizing tube 31 is located below the liquid level in the liquid storage tank 3, and the negative pressure separation tank 2 is located above the liquid storage tank 3. Through the arrangement, the negative pressure separation box 2 is communicated with the liquid storage tank 3 through the pressure stabilizing tube 31, and a part of the pressure stabilizing tube 31 is positioned below the liquid level of the liquid storage tank 3, because the negative pressure separation box 2 is positioned above the liquid storage tank 3, liquid in the liquid storage tank 3 tends to move towards the inside of the negative pressure separation box 2 along the pressure stabilizing tube 31, but the vacuum degree in the negative pressure separation box 2 is not high, and the liquid needs to overcome the gravity of the liquid generated by the liquid when moving towards the negative pressure separation tube, so the liquid level in the pressure stabilizing tube 31 is positioned between the negative pressure separation box 2 and the liquid storage tank 3 under the combination of the gravity and the pressure difference. Therefore, although the negative pressure separation tank 2 is communicated with the liquid storage tank 3, the purpose of continuously discharging the liquid in the negative pressure separation tank 2 is realized through the connection relationship and the position relationship between the liquid storage tank 3 and the negative pressure separation tank 2, and the sealing of the pressure maintaining tube 31 and the maintenance of the negative pressure state in the negative pressure separation tank 2 are realized through the liquid in the liquid storage tank 3. In addition, in the present embodiment, in order to facilitate discharging all the liquid in the negative pressure separation tank 2, in the present embodiment, the connection portion between the surge tank 31 and the negative pressure separation tank 2 is located at the bottom of the negative pressure separation tank 2, and in order to further discharge all the liquid in the negative pressure separation tank 2, the negative pressure separation tank 2 is provided in an inverted circular truncated cone shape.

Further, because the foam in the negative pressure separation box 2 still needs a certain time in the broken natural condition, especially when the foam in the ordinary pressure desulfurizing tower 1 is more, the foam is easily inhaled the vacuum system, so in this embodiment, in order to protect the vacuum system not destroyed, still including the defoaming subassembly, the defoaming subassembly includes defoaming agent jar 41 and defoaming agent pipe 42, defoaming agent jar 41 passes through defoaming agent pipe 42 and inhales bubble pipe 21 and communicates, wherein how defoaming agent pipe 42 communicates with inhales bubble pipe 21 belongs to prior art, give unnecessary details here, be equipped with the governing valve 43 of adjustable flow on the defoaming agent pipe 42 simultaneously. In the present embodiment, the valve body is preferably a needle valve, and those skilled in the art can also use one of the regulating valve 43, a V-valve, an angle valve, a butterfly valve and a diaphragm valve. By adding the defoaming agent in the process of absorbing the foam into the negative pressure separation box 2, partial elimination of the foam is completed in the process of absorbing the foam into the negative pressure separation box 2, and the accumulation amount of the foam in the negative pressure separation box 2 is reduced. Meanwhile, the vacuum tube 22 is transparent so as to facilitate the adjustment of the adding amount of the defoaming agent by field production personnel. Through above setting, when this embodiment is when using, on-the-spot production personnel can judge whether the foam is too much in the negative pressure separator box 2 through observing whether there is the foam in the vacuum tube 22, when having the foam in the vacuum tube 22, need increase the flow of defoaming agent.

The specific use method comprises the following steps: A. closing the regulating valve 43; B. starting a vacuum system to vacuumize the negative pressure separation box 2, and generating pressure difference between the negative pressure separation box 2 and the washing tower; C. the operator gradually increases the flow of the anti-foaming agent according to the conditions inside the vacuum tube 22 until there are no air bubbles inside the vacuum tube 22. Through the above operations, the foam of the atmospheric desulfurization tower 1 is sucked into the negative pressure separation tank 2, starts to react with the defoaming agent in the foam suction pipe 21 and is crushed into liquid, and finally is completely converted into liquid in the negative pressure separation tank 2, and then flows to the liquid storage tank 3 through the pressure stabilizing pipe 31. The technical effects of foam elimination and liquid recovery in the normal-pressure desulfurization tower 1 are achieved, and the problems that labor is strong and operators are prone to unsafe and the like due to the fact that foam needs to be scooped out manually in the traditional technology are solved.

Example 2:

the present embodiment differs from embodiment 1 in that the material for the defoaming unit and the bubble suction pipe 21 is different.

In this embodiment, as shown in fig. 2, the defoaming component is a medical infusion set that is a commercially available product, namely, a solution bag 51, a flexible tube 52, a flow regulator 54 and a needle 54 of the medical infusion set, and details of the detailed structure of the medical infusion set are not described herein because of its prior art. In the present embodiment, the bubble vial 21 is preferably made of a soft material, and the solution bag 51 for medical use is used for containing an antifoaming agent, and the needle 54 for medical use is used for piercing the bubble vial 21 and communicating the hose 52 with the bubble vial 21. The rest of the components are the same as those in embodiment 1 and are not described in detail herein.

Through the technical scheme, the technical effect of controlling the flow of the defoaming agent can be achieved by operating the flow regulator 52 of the medical injector by an operator. And the medical injector is a common product in the market, has low price and effectively reduces the reconstruction cost. The specific working process is the same as that of embodiment 1, and is not described herein.

In the embodiment, the specific connection mode of each mentioned part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, machines, parts and equipment adopt conventional models in the prior art, and circuit connection adopts a conventional connection mode in the prior art, and detailed description is omitted here.

The foam removing system of the natural gas normal pressure desulfurizing tower provided by the utility model is introduced in detail, the principle and the implementation mode of the utility model are explained by applying specific examples, and the explanation of the above examples is only used for helping to understand the method and the core idea of the utility model; while the invention has been described in terms of specific embodiments and applications, it will be apparent to those skilled in the art that numerous variations and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. The utility model provides a natural gas atmospheric desulfurization tower remove foam system which characterized in that: including vacuum system, bubble suction pipe (21) and negative pressure separator box (2), negative pressure separator box (2) are through bubble suction pipe (21) and ordinary pressure desulfurizing tower (1) intercommunication, bubble suction pipe (21) and the foam gathering department of ordinary pressure desulfurizing tower connecting portion position in ordinary pressure desulfurizing tower (1), vacuum system passes through vacuum tube (22) and negative pressure separator box (2) intercommunication.

2. The defoaming system of the natural gas atmospheric desulfurization tower according to claim 1, characterized in that: the foam-foam separation device is characterized by further comprising a liquid storage tank (3), liquid is arranged in the liquid storage tank (3), the negative pressure separation box (2) is communicated with the liquid storage tank (3) through a pressure stabilizing tube (31), one end, far away from the negative pressure separation box (2), of the pressure stabilizing tube (31) is located at a foam gathering position in the liquid storage tank (3), and the negative pressure separation box (2) is located above the liquid storage tank (3).

3. The defoaming system of the natural gas atmospheric desulfurization tower according to claim 1, characterized in that: still include defoaming subassembly, the defoaming subassembly includes defoaming agent jar (41) and defoaming agent pipe (42), and defoaming agent jar (41) are through defoaming agent pipe (42) and straw (21) intercommunication, be equipped with adjustable flow's governing valve (43) on defoaming agent pipe (42).

4. The defoaming system of the natural gas atmospheric desulfurization tower according to claim 3, characterized in that: the regulating valve (43) is a needle valve.

5. The defoaming system of the natural gas atmospheric desulfurization tower according to claim 3, characterized in that: the connecting part of the vacuum tube (22) and the negative pressure separation box (2) is positioned at the top of the negative pressure separation box (2).

6. The defoaming system of the natural gas atmospheric desulfurization tower according to claim 1, characterized in that: the vacuum tube (22) is arranged in a transparent manner.

7. The defoaming system of the natural gas atmospheric desulfurization tower according to claim 1, characterized in that: the negative pressure separation box (2) is arranged in an inverted round table shape.

8. The defoaming system of the natural gas atmospheric desulfurization tower according to claim 1, characterized in that: the vacuum system is a vacuum pump.

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