CN213866099U - Liquid filter for removing mechanical impurities and soluble salts in well head gas - Google Patents
Liquid filter for removing mechanical impurities and soluble salts in well head gas Download PDFInfo
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- CN213866099U CN213866099U CN202022578592.9U CN202022578592U CN213866099U CN 213866099 U CN213866099 U CN 213866099U CN 202022578592 U CN202022578592 U CN 202022578592U CN 213866099 U CN213866099 U CN 213866099U
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Abstract
The utility model discloses a liquid filter for desorption well head gas in mechanical impurity and soluble salt. The liquid filter comprises a buffer tank, a vertical cylinder and a filtrate circulating system; the lower end of the vertical cylinder is communicated with the upper end of the buffer tank and comprises a tower tray filtering device, a demister and a treatment gas connecting pipe; the filtrate circulating system comprises a filtrate circulating pump, a filtrate replenishing pump, a circulating liquid inlet connecting pipe and a circulating liquid outlet connecting pipe. The filtrate circulating system is used for keeping the filtrate in the buffer tank and the three-dimensional cylinder to circularly flow, so that the wellhead gas entering the liquid filter is continuously kept in contact with the filtrate in the rising process, and therefore mechanical impurities such as dust and soluble salt in the wellhead gas are removed, the harm to downstream conveying pipelines and devices caused by the mechanical impurities such as dust and the soluble salt in the wellhead gas is reduced, the overhaul period of the device is prolonged, the long-period stable operation of the device is realized, and the purposes of reducing the maintenance cost and the operation cost of a production device are achieved.
Description
Technical Field
The disclosure relates to the technical field of gas purification containing mechanical impurities such as salt, dust and the like, in particular to a liquid filter for removing the mechanical impurities and soluble salts in wellhead gas.
Background
The statements in this section merely provide background information related to the present disclosure and may constitute prior art. In implementing the present invention, the inventors found that there are at least the following problems in the prior art.
In the process of gas field exploitation, mechanical impurities such as dust and the like and free water are carried in natural gas from a wellhead, and the free water contains soluble salts. If the dust and the salt in the free water in the wellhead natural gas (hereinafter referred to as wellhead gas) are not removed, mechanical impurities such as the dust carried in the wellhead gas and the salt in the free water enter solution systems such as amine liquid in the downstream desulfurization treatment process and are accumulated continuously, so that the hazards of blockage, corrosion and the like of equipment and pipelines are caused; while at the same time adversely affecting the processing station technology. Therefore, the well head gas is usually subjected to purification treatment such as removal of mechanical impurities such as dust and free water.
At present, the purification technology for removing mechanical impurities such as dust and the like and free water in wellhead gas usually adopts a sedimentation method and a mechanical filtration method.
The sedimentation method is a unit operation for mechanically separating heterogeneous mixtures, and is an operation process for realizing separation by utilizing the density difference between mechanical impurities such as natural gas, dust and the like and free water to enable the mechanical impurities such as the natural gas, the dust and the like and the free water to move relatively. Therefore, the separation of mechanical impurities such as natural gas, dust and the like and free water in the wellhead gas is realized, and the purpose of removing the mechanical impurities such as dust and the like and the free water in the wellhead gas is achieved. The sedimentation process is divided into gravity sedimentation and centrifugal sedimentation according to different external forces for realizing sedimentation operation. Wherein: the gravity settling is a settling process under the action of gravity, and is realized by a gravity separator, and the relative motion of natural gas, mechanical impurities such as dust and the like and free water in the gravity separator is realized by utilizing the density difference between the mechanical impurities such as natural gas, dust and the like and the free water, wherein the density of the mechanical impurities such as dust and the like and the free water is higher than that of the natural gas. The flow speed in the gravity separator is lower than that in the pipeline before the gravity separator, and the natural gas and dust and other mechanical impurities and free water move relatively. The gravity separator is divided into a vertical gravity separator and a horizontal gravity separator, and the vertical gravity separator is usually used for removing mechanical impurities such as dust and the like and free water from wellhead gas. Well head gas gets into by the middle part of gravity separator, and the natural gas flows to the upper segment of gravity separator, and the natural gas is discharged by the last port of gravity separator, and mechanical impurity such as dust and free water subside to the hypomere of gravity separator, and mechanical impurity such as dust and free water discharge from the lower port of gravity separator to realize the separation of mechanical impurity such as natural gas and dust and free water in the well head gas, reach the purpose of desorption well head gas mechanical impurity such as dust and soluble salt in the free water. The centrifugal sedimentation is realized by a cyclone separator, and the natural gas, the dust and other mechanical impurities and the free water move relatively in the cyclone separator by utilizing the density difference of the natural gas, the dust and other mechanical impurities and the free water, wherein the density of the dust and other mechanical impurities and the free water is higher than that of the natural gas. Well head gas enters tangentially from an air inlet pipe at the upper part of a cylinder of the cyclone separator and moves spirally from top to bottom under the constraint of the wall of the cyclone separator. Under the action of inertial centrifugal force, mechanical impurities such as dust and the like and free water are thrown to the wall of the cyclone separator, then fall to the cone bottom along the wall surface of the cyclone separator to be separated from natural gas, the mechanical impurities such as dust and the like and the free water are discharged from the cone bottom opening of the cyclone separator, and the natural gas spirally moves from bottom to top near the central shaft and is discharged from the top opening of the cyclone separator. Therefore, the separation of mechanical impurities such as natural gas and dust in the wellhead gas and free water is realized, and the purposes of removing the mechanical impurities such as dust in the wellhead gas and soluble salts in the free water are achieved.
The mechanical filtering method is that under the action of pressure difference, natural gas passes through the pore canal of the filter element, and large-particle mechanical impurities such as dust and part of free water are intercepted on the filter element, thereby realizing the separation of the natural gas, the mechanical impurities such as dust and the like and the free water in the wellhead gas, and achieving the purpose of removing the mechanical impurities such as dust and the like in the wellhead gas and soluble salt in the free water.
The gravity settling method is limited by the size of the gravity separator, so that the settling separation time is limited, and the removal rate of mechanical impurities such as small-particle dust and free water is low. In the purification process of well head gas to remove mechanical impurities such as dust and free water, the size of the gravity separator is usually designed to separate mechanical impurities such as dust with particle size of more than 10um and free water with efficiency of 95%. Therefore, a large amount of mechanical impurities such as dust and soluble salts still enter downstream conveying pipelines and devices to cause damage to the downstream conveying pipelines and devices.
In the centrifugal sedimentation method, because the cyclone separator has larger pressure drop and is limited by multiple factors such as pressure drop allowed in a purification process for removing mechanical impurities such as dust from wellhead gas, free water and the like, and the structure of the cyclone separator, in the purification process for removing mechanical impurities such as dust from wellhead gas and free water, the cyclone separator is usually designed with the efficiency of separating mechanical impurities such as dust with the particle size of more than 5um and free water of 95 percent. Therefore, a large amount of mechanical impurities such as dust and soluble salts still enter downstream conveying pipelines and devices to cause damage to the downstream conveying pipelines and devices; meanwhile, the well head gas has high flow speed in the cyclone separator, mechanical impurities such as dust and the like carried in the well head gas seriously erode the wall of the cyclone separator, the service life of the cyclone separator is short, and the operation cost is high.
The mechanical filtration method removal efficiency depends on the size of a filter element pore passage, sand with the diameter smaller than that of the filter element pore passage passes through the pore passage, the smaller the filter element pore passage is, the larger the pressure drop of well head gas passing through the filter element is, the pressure drop is limited by mechanical impurities such as well head gas dust removal and the like and the allowable pressure drop in a free water purification process, and in the process of well head gas dust removal and the like mechanical impurities such as well head gas dust removal and the free water purification process, a cyclone separator is usually designed with the efficiency of separating the mechanical impurities such as dust with the particle size larger than 0.5um and the free water being 98%. Therefore, a large amount of mechanical impurities such as dust and soluble salts still enter downstream conveying pipelines and devices to cause damage to the downstream conveying pipelines and devices; meanwhile, with the increase of mechanical impurities such as dust and free water attached to the filter element, the pressure drop of well head gas passing through the filter element is increased, when the pressure drop reaches a limit value, the filter element needs to be replaced, and the operation cost is high.
Disclosure of Invention
In view of the above, it is an object of the present invention to solve some of the problems of the prior art, or at least alleviate them.
A liquid filter for removing mechanical impurities and soluble salts from well head gas, comprising
The buffer tank comprises a wellhead gas connecting pipe and a sewage discharge valve; the wellhead gas connecting pipe is positioned at the top of the buffer tank and is used for connecting wellhead gas;
the lower end of the vertical cylinder is communicated with the buffer tank; the vertical cylinder comprises a tower tray filtering device, a filtrate removing device and a treatment gas connecting pipe; the tower tray filtering device is fixedly arranged at the lower part of the vertical cylinder, and the filtrate removing device is fixedly arranged at the upper part of the vertical cylinder; the processing gas connecting pipe is positioned at the top end of the vertical cylinder and used for releasing well head gas;
the filtrate circulating system comprises a filtrate circulating pump, a circulating liquid inlet connecting pipe and a circulating liquid outlet connecting pipe; the circulating liquid inlet connecting pipe is communicated with the vertical cylinder, and the horizontal height of the circulating liquid inlet connecting pipe is higher than that of the tower tray filtering device; and the circulating liquid outlet connecting pipe is positioned at the bottom of the buffer tank and is communicated with the buffer tank.
Further, the buffer tank also comprises a dirty oil discharge system.
Further, the dirty oil discharging system comprises an oil separating plate and a dirty oil discharging connecting pipe; the oil separation plate is arranged inside the buffer tank and is fixedly connected with the bottom of the buffer tank; the dirty oil discharging connecting pipe is fixedly arranged at the bottom of the buffer tank.
Furthermore, the buffer tank is provided with a dirty oil level meter.
Optionally, the filtrate removal device is a demister.
The tray filtering device comprises a first tray and a second tray which are communicated through a first downcomer; the circulating liquid inlet connection is located between the first tray and the demister.
The filtrate circulation system also comprises a filtrate replenishing pump.
The buffer tank is provided with a filtrate liquid level meter.
The utility model discloses following beneficial effect has:
1. compared with the gravity settling method, the utility model has higher efficiency of removing the mechanical impurities such as dust and soluble salt carried in the wellhead gas, eliminates the harm of the mechanical impurities such as dust and soluble salt carried in the wellhead gas to downstream processing equipment and process systems, has small downstream equipment maintenance amount, greatly reduces the pollution to downstream process media, and has low operation cost;
compared with the centrifugal sedimentation method, the utility model discloses the efficiency of mechanical impurities such as dust smuggleing secretly in the desorption well head gas and soluble salt is higher, has eliminated smuggleing secretly mechanical impurities such as dust and soluble salt in the well head gas and to the harm of low reaches treatment facility and process system, and low reaches plant maintenance volume is little, and greatly reduced is to the pollution of low reaches technology medium, and the running cost is low. Meanwhile, the flow velocity of well head gas in the system is low, mechanical impurities such as dust and the like cause little damage to the equipment in the system, the maintenance cost is low, and the operation cost is low;
compared with the mechanical filtration method, the utility model discloses the efficiency of free water and sand smuggleing secretly in the desorption well head gas is higher, has eliminated secretly mechanical impurities such as dust and free water to the harm of low reaches treatment facility and process system secretly in the well head gas, and low reaches plant maintenance volume is little, and greatly reduced is to the pollution of low reaches technology medium, and the running cost is low. And simultaneously, the utility model discloses need not change equipment and the relevant part of equipment, the running cost is low.
2. Through sump oil discharge system, make sump oil and sewage separation to realize safe emission, avoid the polluted environment.
3. And a filtrate circulating system is adopted, so that the filtrate filter can always keep a filtering state. And the impurity removal medium is uniformly distributed by matching with the tower tray filtering device, so that the well head gas and the filtrate are ensured to be more uniformly and fully contacted, and the impurity removal efficiency is greatly improved.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic diagram of the tray structure of the present invention;
fig. 3 is a step diagram of the method for removing impurities according to the present invention.
Wherein 1, a buffer tank; 2-circulating liquid outlet connecting pipe; 3-sewage discharge connecting pipe; 4-filtrate level gauge; 5-oil removal plate; 6-dirty oil discharge connecting pipe; 7-sump oil level gauge; 8-well head gas connecting pipe; 9-a first tray support ring; 10-circulating liquid inlet connecting pipe; 11-a demister support ring; 12-a demister; 13-treating the gas connection pipe; 14-a first tray; 15-a first downcomer; 16-a vertical cylinder; 17-a second tray; 18-a second tray support ring; 19-a second downcomer; 20-a wellhead gas shut-off valve; 21-a make-up fluid cut-off valve; 22-filtrate makeup valve; 23-filtrate circulating pump; 24-filtrate circulating pump inlet valve; 25-a sewage drain valve; 26-dirty oil drain valve; 27-a process gas outlet valve; 28-overflow weir.
Detailed Description
The following description of the present invention will be further described with reference to the accompanying drawings, and the embodiments of the present invention are only used for illustrating the present invention and not for limiting the present invention, and various replacements and modifications can be made according to the common technical knowledge and the conventional means in the field without departing from the technical idea of the present invention, and all should be included in the scope of the present invention.
As shown in figure 1, the liquid filter for removing mechanical impurities and soluble salts in well head gas comprises
The buffer tank 1 comprises a wellhead gas connecting pipe 8 and a sewage discharge valve 25; the wellhead gas connecting pipe 8 is positioned at the top of the buffer tank 1 and is used for connecting wellhead gas;
the lower end of the vertical cylinder 16 is communicated with the buffer tank 1; the vertical cylinder 16 comprises a tray filtering device, a filtrate removing device and a treatment gas connecting pipe 13; the tray filtering device is fixedly arranged at the lower part of the vertical cylinder 16, and the filtrate removing device is fixedly arranged at the upper part of the vertical cylinder 16; the processing gas connecting pipe 13 is positioned at the top end of the vertical cylinder 16 and used for releasing well head gas;
a filtrate circulating system comprising a filtrate circulating pump 23, a circulating liquid inlet connecting pipe 10 and a circulating liquid outlet connecting pipe 2; the circulating liquid inlet connecting pipe 10 is communicated with the vertical cylinder 16 and is higher than the tower tray filtering device in horizontal height; and the circulating liquid outlet connecting pipe 2 is positioned at the bottom of the buffer tank 1 and is communicated with the buffer tank 1.
As shown in figure 1, a well head gas connecting pipe 8 is positioned at the top of a buffer tank 1, a circulating liquid outlet connecting pipe 2 is positioned at the bottom of the buffer tank 1, and a vertical cylinder 16 is positioned at the upper part of the buffer tank 1 and can be fixedly connected with the buffer tank 1 in a welding mode and the like. The filtrate removing device is a demister 12 which is connected through a demister support ring 11 fixedly arranged at the upper section in the vertical cylinder 16 and is used for intercepting the filtrate carried in the treatment gas, the filtrate returns to the first tower tray 14, and the treatment gas is sent out of the liquid filter through a treatment gas connecting pipe 13 and a treatment gas outlet valve 27.
As shown in fig. 1, the tray filtration device comprises at least two trays and a downcomer. As shown in fig. 2, the tray filtration device comprises a first tray 14 and a second tray 17, communicating through a first downcomer 15; the circulating liquid inlet connection 10 is located between the first tray 14 and the demister 12. The first tray 14 is fixedly connected with the vertical cylinder 16 through a first tray support ring 9 fixedly connected with the vertical cylinder 16, the second tray 17 is fixedly connected with the vertical cylinder 16 through a second tray support ring 18 fixedly connected with the vertical cylinder 16, and both the first downcomer 15 and the second downcomer 19 are positioned inside the vertical cylinder 16 and fixedly connected with the vertical cylinder 16 through welding and other modes, as shown in fig. 1.
The tray filter device is arranged to have two functions:
1. the medium is uniformly distributed. As shown in FIG. 2, the well head gas rises from bottom to top, and the filtrate flows from top to bottom, and passes through several layers of trays, wherein the trays are plane and are provided with dense and hemp holes, so that the gas and the liquid can be contacted with each other uniformly and sufficiently.
2. Has a certain supporting function. Some columns are packed columns, which can be tray-packed with some packing, which also aims to distribute the medium evenly.
The filtrate circulation system can continuously feed filtrate into the vertical cylinder 16, flow downwards through the tray filtration device and flow into the buffer tank 1 again, and repeatedly circulate through the filtrate circulation pump 23. The filter is mainly used for keeping filtrate in the tray filtering device of the vertical cylinder 16 and the buffer tank 1 to circularly flow, so that the whole filtrate filter is always kept in a filtrate filtering state. Mechanical impurities such as dust and soluble salts carried in the well head gas are blocked by the filtrate and enter the buffer tank 1 along with the filtrate through the downcomer 19.
In order to ensure the filtrate circulation, a certain amount of filtrate needs to be supplemented in the buffer tank 1 in advance. As shown in fig. 1, the filtrate circulation system further includes a filtrate replenishment pump 22 communicating with a pipe between the filtrate circulation pump 23 and the circulation liquid inlet connection pipe 10, so that the filtrate circulation system can be replenished with filtrate through the replenishment liquid cut-off valve 21 and the filtrate replenishment pump 22. The filtrate make-up pump 22 can make up the filtrate for the first time. The buffer tank 1 is provided with a filtrate liquid level meter 4, as shown in fig. 1, and filtrate can be supplemented into the filtrate filter at ordinary times according to the filtrate liquid level condition. The filtrate can also be discharged through the sewage discharge connection 3 and the sewage discharge valve 25 according to the filtrate level. Generally, 50% to 98% of the filtrate in the lower part of the buffer tank 1 is circulated by the filtrate circulation pump 23, and the remaining 50% to 2% of the filtrate in the lower part of the buffer tank 1 is discharged from the filtrate filter through the sewage discharge valve 25.
The circulating liquid inlet connecting pipe 10 is positioned on the side surface of the vertical cylinder 16 and is fixedly connected with the vertical cylinder 16 by welding and other modes.
Buffer tank 1 still includes sump oil discharge system, as shown in fig. 1, mainly used with the filtrating with the oil separation, realize discharging respectively of filtrating and oil, avoid causing environmental pollution. The dirty oil discharging system comprises an oil separation plate 5 and a dirty oil discharging connecting pipe 6; the oil separation plate 5 is arranged inside the buffer tank 1 and is fixedly connected with the bottom of the buffer tank 1; the dirty oil discharge connecting pipe 6 is fixedly arranged at the bottom of the buffer tank 1.
Because well head gas carries out a lot of filtration at buffer tank 1 and vertical barrel, the filtrating that flows down through downcomer 19 deposits in buffer tank 1 lower part, realizes water oil separating in buffer tank 1, and water is in the lower part, and oil is on the upper strata, and the oil reservoir crosses oil removal board 5 and gets into the oil storage pond to discharge liquid filter through sump oil discharge valve 26.
The buffer tank 1 is provided with a dirty oil level meter 7, as shown in fig. 1. Sump oil level gauge 7 is located buffer tank 1 side, through modes such as welding and buffer tank 1 fixed connection. The liquid level of sump oil can be observed through the sump oil level meter 7, so that the sump oil is discharged regularly, and safe discharge is realized.
The process steps are described as follows:
well head gas enters the liquid filter from the upper part of the buffer tank 1 through a well head gas cut-off valve 20; after the well head gas enters the liquid filter, part of mechanical impurities such as dust and free water are separated from the upper part of the buffer tank 1, part of mechanical impurities such as dust and free water separated from the upper part of the buffer tank 1 are deposited at the bottom of the buffer tank 1, and the well head gas carries the rest of mechanical impurities such as dust and free water to enter a tower tray filtering device and to be in countercurrent contact with the filtrate sent by a filtrate circulating pump 23; the well head gas passes through a filter liquid layer on the tower tray, in the process, free water carried in the well head gas is fused with the filter liquid on the tower tray, mechanical impurities such as dust and the like carried in the well head gas are blocked in the filter liquid layer on the tower tray, and the well head gas carries a small amount of filter liquid with low soluble salt content to leave a filter device of the tower tray and enter the upper half section of a liquid filter; the well head gas further separates the entrained filtrate in the upper half section of the liquid filter, the filtrate falls into a tower tray filtering device, and the well head gas enters a demister 12 at the top of the vertical container and then is sent out of the system through a treatment gas outlet valve 27; filtrate on the tower tray flows into the buffer tank 1 through a downcomer; 50% -98% of the filtrate is pumped to a tower tray filtering device through a filtrate circulating pump; 50-2% of the filtrate is discharged out of the equipment through a sewage discharge valve; the filtrate was replenished by a filtrate replenishment pump.
The working principle is as follows:
in the process that the well head gas passes through the tower tray filtering device, the physical properties of the free water carried by the well head gas are completely the same as the physical properties of the filtrate in the filtrate layer on the tower tray, and the free water carried by the well head gas is rapidly dissolved with the filtrate in the filtrate layer on the tower tray; in the process that the well head gas passes through the tower tray filtering device, mechanical impurities such as dust carried by the well head gas are blocked in the filter liquid layer on the tower tray under the resistance action of the filter liquid layer on the tower tray; the well head gas is in the process of passing through the tower tray filtering device, the natural gas is not dissolved in the filtrate, the density of the natural gas is smaller than that of the filtrate, and the natural gas passes through the filtrate layer on the tower tray. The natural gas flow rate is low after passing through the filtrate layer on the tower tray, the filtrate amount carried by the natural gas after passing through the filtrate layer on the tower tray is small, and simultaneously, the free water carried by the natural gas is basically and completely separated after the natural gas passes through the upper half section of the gravity settling separation of the liquid filter. The purpose of removing dust and other mechanical impurities and soluble salts in the wellhead gas is achieved.
As shown in fig. 3, the method for removing mechanical impurities and soluble salts from well head gas comprises the following steps:
establishing the liquid level of a buffer tank 1;
opening an inlet valve 24 of the filtrate circulating pump, and starting the filtrate circulating pump 23;
opening a well head gas cut-off valve 20, and allowing well head gas to enter the buffer tank 1 through a well head gas connecting pipe 8;
primary impurity removal is carried out on well head gas through a buffer tank 1;
the well head gas rises through a tower tray filtering device of the vertical cylinder 16 and is in countercurrent contact with the filtrate flowing down from the downcomer to carry out secondary impurity removal;
the well head gas after secondary impurity removal rises and passes through a demister 12, and the filtrate carried in the treated well head is intercepted; the filtrate is returned to the tray filtration unit and the treated well head gas is sent out through treated gas outlet valve 27.
After well head gas got into buffer tank 1, the volume flow rate reduces, and the density of mechanical impurity such as dust and free water are little than the density of natural gas, and under the action of gravity, relative motion takes place for mechanical impurity such as natural gas and dust and free water in buffer tank 1, separates out mechanical impurity such as partial dust and free water, and mechanical impurity such as dust and free water that buffer tank 1 separated out realize first edulcoration in the deposit of 1 lower part of buffer tank.
Well mouth gas from the buffer tank 1 enters the lower part of the vertical cylinder 16, and is in countercurrent contact with filtrate flowing down from the first downcomer 16 on the upper part of the second tray 17, mechanical impurities such as dust and soluble salt carried in the inlet gas are blocked by the filtrate, and enter the buffer tank 1 along with the filtrate through the downcomer 19, and the thickness of the filtrate layer is realized by adjusting the height of the overflow weir 28 of the second downcomer 19;
the well head gas passing through the second tray 17 enters the first tray 14 again, and is in countercurrent contact with the filtrate sent by the filtrate circulating pump 23 and the filtrate replenishing pump 22 at the upper part of the first tray 14, mechanical impurities such as dust and soluble salts carried in the inlet gas are further blocked by the filtrate, and enter the second tray 17 along with the filtrate through the first downcomer 15, and the thickness of the filtrate layer is realized by adjusting the height of the overflow weir 28 of the first downcomer 15.
Therefore, secondary impurity removal of the wellhead gas is realized.
The following steps can be adopted when the liquid level of the buffer tank 1 is established:
step one, opening a make-up fluid cut-off valve 21, and sending filtrate to a filtrate device through a filtrate make-up pump 22 to establish the liquid level of a buffer tank 1;
step two, starting a filtrate replenishing pump 22, sending the filtrate to a filtrate filter through the filtrate replenishing pump 22, and establishing the liquid level of the buffer tank 1;
step three, stopping the filtrate replenishing pump 22;
and step four, closing the replenishing liquid cut-off valve 21.
The method for removing mechanical impurities and soluble salts in well head gas also comprises filtrate treatment, and comprises the following steps:
the filtrate flowing down from the downcomer 19 is deposited at the lower part of the buffer tank 1, oil-water separation is realized in the buffer tank 1 due to oil-water incompatibility and oil-water density difference, water is at the lower part, oil is at the upper layer, the oil layer enters an oil storage pool through an oil separation plate 5, and the oil is discharged out of a liquid filter through a dirty oil discharge valve 26;
50% -98% of the filtrate at the lower part of the buffer tank 1 is recycled by a filtrate circulating pump 23, and the rest 50% -2% of the filtrate at the lower part of the buffer tank 1 is discharged out of the filtrate filter by a sewage discharge valve 25.
The utility model provides a liquid filter and method of mechanical impurity such as dust and soluble salt in desorption well head gas, a purification process for mechanical impurity such as well head gas desorption dust and soluble salt, improve the desorption rate of mechanical impurity such as dust and soluble salt in the well head gas, mechanical impurity such as dust and soluble salt get into low reaches pipeline and device in reducing well head gas, mechanical impurity such as dust and soluble salt cause harm to low reaches pipeline and device in reducing well head gas, reduce the process pressure drop, soluble salt smuggleing secretly in the well head gas is to equipment, the corruption of pipeline, soluble salt smuggleing secretly in reducing well head gas is to the pollution of process medium, the extension device maintenance cycle, realize device long period even running, in order to reach the purpose that reduces apparatus for production cost of maintenance and running cost.
The fixed connection which is not specified can be a connection mode such as riveting, welding, bolt connection and the like, a movable connection can be a connection mode such as hinging and the like.
Claims (8)
1. A liquid filter for removing mechanical impurities and soluble salts from well head gas, which is characterized by comprising
The buffer tank (1) comprises a wellhead gas connecting pipe (8) and a sewage discharge valve (25); the wellhead gas connecting pipe (8) is positioned at the top of the buffer tank (1) and is used for connecting wellhead gas;
the lower end of the vertical cylinder (16) is communicated with the buffer tank (1); the vertical cylinder (16) comprises a tray filtering device, a filtrate removing device and a treatment gas connecting pipe (13); the tray filtering device is fixedly arranged at the lower part of the vertical cylinder (16), and the filtrate removing device is fixedly arranged at the upper part of the vertical cylinder (16); the processing gas connecting pipe (13) is positioned at the top end of the vertical cylinder (16) and is used for releasing well head gas;
the filtrate circulating system comprises a filtrate circulating pump (23), a circulating liquid inlet connecting pipe (10) and a circulating liquid outlet connecting pipe (2); the circulating liquid inlet connecting pipe (10) is communicated with the vertical cylinder (16) and is higher than the tray filtering device in horizontal height; the circulating liquid outlet connecting pipe (2) is positioned at the bottom of the buffer tank (1) and is communicated with the buffer tank (1).
2. The liquid filter for removing mechanical impurities and soluble salts from well head gas according to claim 1, characterized in that the buffer tank (1) further comprises a dirty oil discharge system.
3. The liquid filter for removing mechanical impurities and soluble salts from well head gas according to claim 2, characterized in that the dirty oil drain system comprises an oil removal plate (5) and a dirty oil drain connection (6); the oil separation plate (5) is arranged inside the buffer tank (1) and is fixedly connected with the bottom of the buffer tank (1); the dirty oil discharging connecting pipe (6) is fixedly arranged at the bottom of the buffer tank (1).
4. A liquid filter for removing mechanical impurities and soluble salts from well head gas according to claim 3, characterized in that the buffer tank (1) is provided with a sump oil level meter (7).
5. The liquid filter for removing mechanical impurities and soluble salts from well head gas according to claim 1, characterized in that the filtrate removal device is a demister (12).
6. A liquid filter for the removal of mechanical impurities and soluble salts from well head gas according to claim 5, characterized in that the tray filtration means comprises a first tray (14) and a second tray (17) communicating through a first downcomer (15); the circulating liquid inlet connection (10) is located between the first tray (14) and the demister (12).
7. The liquid filter for removing mechanical impurities and soluble salts from well head gas according to claim 1, characterized in that the buffer tank (1) is provided with a filtrate level meter (4).
8. The liquid filter for removing mechanical impurities and soluble salts from well head gas according to claim 1, characterized in that the filtrate circulation system further comprises a filtrate make-up pump (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022578592.9U CN213866099U (en) | 2020-11-10 | 2020-11-10 | Liquid filter for removing mechanical impurities and soluble salts in well head gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022578592.9U CN213866099U (en) | 2020-11-10 | 2020-11-10 | Liquid filter for removing mechanical impurities and soluble salts in well head gas |
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| Publication Number | Publication Date |
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| CN213866099U true CN213866099U (en) | 2021-08-03 |
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| CN202022578592.9U Active CN213866099U (en) | 2020-11-10 | 2020-11-10 | Liquid filter for removing mechanical impurities and soluble salts in well head gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN213866099U (en) |
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