High-pressure impurity removal and sand integration device and use method

Abstract

The application relates to the technical field of natural gas pretreatment, and particularly discloses a high-pressure impurity removal and sand filtering integrated device and a use method, which comprises a buffer chamber used for receiving natural gas discharged from a well mouth; a cyclone separation chamber, which is internally provided with a cyclone sand remover connected with the buffer chamber; a filter shell, which is communicated with the cyclone separation chamber and used for receiving natural gas separated through the cyclone sand remover; an adsorption separation assembly, which comprises a plurality of adsorption plates arranged in a staggered and spaced manner along a gas flow direction; the outer wall of the adsorption plate is a rough surface, the adsorption plate is provided with a temperature control cavity; a temperature control assembly is used for introducing cooling medium or heating medium into the temperature control cavity to realize cooling or heating of the adsorption plate; and the buffer chamber and the cyclone separation chamber are integrally arranged on the filter shell. The application can realize effective separation of high-viscosity flocculent floating matters in the natural gas, improve the separation effect of the natural gas, and relieve the problem that the sand remover is eroded due to high pressure of the natural gas at the well mouth outlet.

Description

Technical Field

[0001] This invention relates to the field of natural gas pretreatment technology, specifically to an integrated high-pressure impurity removal and sand filtering device and its usage method. Background Technology

[0002] With the continuous upgrading of natural gas extraction technology and the breakthroughs in drilling depth from deep wells to ultra-deep wells, the extracted natural gas carries a large amount of mud, sand, high-viscosity flocculent matter, and formation water, and the operating pressure is high (up to 69 MPa) and the gas flow rate is fast. Generally, desanders are used to process the natural gas. Existing desanders generally separate impurities from gas by forcibly changing the airflow direction and using the principle of centrifugation. However, under the conditions of mud, sand, and high-viscosity flocculent matter, larger high-viscosity flocculent matter can be separated in the desander due to its greater gravity. However, some smaller high-viscosity flocculent matter, due to its smaller gravity and higher viscosity, flows out with the natural gas, resulting in poor natural gas separation. Existing technology uses filter components to filter natural gas to separate high-viscosity flocculent matter from natural gas. However, due to the high viscosity of the flocculent matter, the filter components are prone to clogging.

[0003] Meanwhile, the natural gas at the wellhead outlet has a high operating pressure. If it enters the desander directly, there is a common problem of severe erosion of the desander's structural components. In severe cases, it may cause equipment erosion damage and process shutdown, resulting in serious safety hazards in the on-site process operation. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated high-pressure impurity removal and sand filtering device and its usage method, which can effectively separate high-viscosity flocculent floating matter in natural gas, improve the separation effect of natural gas, and alleviate the problem of erosion of the desander caused by high pressure of natural gas at the wellhead outlet.

[0005] This invention is achieved through the following technical solution:

[0006] An integrated high-pressure impurity removal and sand filtering device includes:

[0007] Buffer chamber, used to receive natural gas exported from the wellhead;

[0008] The cyclone separation chamber is equipped with a cyclone sand separator connected to the buffer chamber.

[0009] The filter housing is connected to the cyclone separator chamber and is used to receive natural gas separated by the cyclone desander;

[0010] The adsorption separation assembly includes multiple adsorption plates arranged in a staggered pattern along the airflow direction; the outer wall of the adsorption plate is rough, and the adsorption plate has a temperature control cavity;

[0011] The temperature control assembly is used for introducing cooling medium or heating medium into the temperature control cavity to cool or heat the adsorption plate.

[0012] The buffer chamber and the cyclone separation chamber are integrally arranged on the filter shell.

[0013] The cyclone sand separator of the present application is the existing equipment, can realize the cyclone separation of the natural gas, can separate most of the heavy high-viscosity flocculent floating matter and formation water and impurities such as sand, the high-viscosity flocculent floating matter and formation water which cannot be separated by the cyclone separation enter the filter shell along with the natural gas and are further separated by the adsorption separation assembly, in the movement process of the natural gas, the formation water entrained in the natural gas impacts on the adsorption plate, resulting in breaking and falling into the bottom of the filter shell; and, since the high-viscosity flocculent floating matter has the characteristic that the viscosity changes with the temperature, the lower the temperature, the greater the viscosity, and the higher the temperature, the lower the viscosity, the adsorption plate of the present application can be adjusted in temperature by the temperature control assembly, in the adsorption separation, when the high-viscosity flocculent floating matter entrained in the natural gas impacts on the adsorption plate with low temperature, on the one hand, the speed is reduced due to the impact, on the other hand, the high-viscosity flocculent floating matter is attached to the adsorption plate due to the increased viscosity at low temperature and the rough surface of the adsorption plate, realizing the separation from the natural gas, at the same time, the sand is further settled in the filter shell; after the impact of multiple adsorption plates, the sand, high-viscosity flocculent floating matter and formation water entrained in the natural gas can be almost completely separated.

[0014] In conclusion, the present application adopts the buffer chamber, the cyclone centrifugal separation chamber and the filter shell capable of realizing the adsorption separation, can sequentially buffer and slow down, cyclone separate and adsorption separate, realizes the three-stage separation; realizes the effective separation of the sand, formation water and high-viscosity flocculent floating matter in the natural gas, especially solves the problem of difficult separation of the high-viscosity flocculent floating matter in the existing natural gas, improves the separation effect of the natural gas, and can alleviate the problem of erosion of the sand remover caused by the high pressure of the natural gas at the wellhead outlet.

[0015] In addition, the present application adopts the integrated design, which can reduce the floor area.

[0016] In a preferred mode, the temperature control cavity is provided with a first joint, the first joint comprising a main pipeline in communication with the temperature control cavity, the main pipeline being connected with a cooling pipe and a heating pipe; the cooling pipe and the temperature control assembly form a cold medium circulation loop; the heating pipe and the temperature control assembly form a hot medium circulation loop.

[0017] In a preferred embodiment, a cooling valve and a heating valve are respectively provided on the cooling pipe and the heating pipe; the temperature control assembly also includes a control unit, which is used to control the start, stop and opening degree of the cooling valve and the heating valve.

[0018] In a preferred embodiment, multiple adsorption plates in the adsorption separation assembly are connected in series via connecting pipes, thereby connecting multiple temperature control chambers, and both the first and last adsorption plates are equipped with a first connector.

[0019] In a preferred embodiment, each adsorption plate is fitted with a first connector.

[0020] In a preferred embodiment, the adsorption plate has a cleaning chamber outside the temperature control chamber. The cleaning chamber is an annular cavity with several first through holes on the bottom and outer wall of the annular cavity. The adsorption plate has a water inlet communicating with the cleaning chamber, through which cleaning water is introduced into the cleaning chamber.

[0021] The adsorption plate of this invention utilizes low temperature combined with a rough surface to adsorb and separate high-viscosity flocculent floating matter entrained in natural gas. During use, some of the adsorbed high-viscosity flocculent floating matter may fall to the bottom of the filter shell and be discharged with the formation water, but some high-viscosity flocculent floating matter will still adhere to the adsorption plate. In order to improve the performance of the adsorption plate, it is necessary to clean the adsorption plate regularly. On the one hand, the viscosity of the high-viscosity flocculent floating matter can be reduced by heating the adsorption plate, which will facilitate its detachment from the adsorption plate. On the other hand, this invention uses a cleaning chamber to introduce cleaning water into the cleaning chamber, and uses the water flow as a medium to remove the high-viscosity flocculent floating matter with reduced viscosity from the adsorption plate, thereby cleaning the adsorption plate.

[0022] In a preferred embodiment, the top of the annular cavity is an open end; an inlet valve is provided on the inlet, and the inlet valve is controlled by a control unit to start / stop and adjust its opening degree.

[0023] In a preferred embodiment, the first through hole on the outer wall of the annular cavity is inclined, with the outer port of the first through hole facing downwards.

[0024] In a preferred embodiment, the air inlet pipe and the air outlet pipe of the buffer chamber are arranged opposite to each other; a flow-regulating component is provided between the air inlet pipe and the air outlet pipe in the buffer chamber.

[0025] In a preferred embodiment, the flow-slowing component includes multiple flow-slowing columns, hollow cylinders, or strip baffles; the strip baffles include corrugated plates or have several protrusions on a flat plate.

[0026] In a preferred embodiment, multiple flow-slowing columns have overlapping portions in the radial direction, preventing the inlet and outlet pipes from being directly connected; the transverse width of the multiple flow-slowing columns is greater than the diameter of the inlet pipe; the outer diameter of the hollow cylinder is greater than the diameter of the inlet pipe; and the width of the strip baffle is greater than the diameter of the inlet pipe.

[0027] In a preferred embodiment, the top of the buffer chamber has an opening, and an annular plate is fitted at the opening; the flow-slowing assembly also includes a base, on which the flow-slowing column, hollow cylinder, and strip baffle are mounted, and the base is detachably connected to the annular plate; an annular guide plate is provided on the base outside the flow-slowing column, hollow cylinder, or strip baffle.

[0028] In a preferred embodiment, the slow-flow column includes a housing, a filter frame is detachably disposed inside the housing, the filter frame is filled with adsorption filler, and the housing is provided with a number of second through holes; the outer side of the filter frame is provided with a number of protrusions along the circumferential direction.

[0029] This invention optimizes the design of the buffer components in the buffer chamber, which can not only achieve buffering and pressure reduction, but also achieve preliminary separation.

[0030] In a preferred embodiment, the filter housing is further provided with a collection chamber, which is located below the cyclone separation chamber and is used to collect particles and moisture separated by the cyclone sand separator. The upper part of the collection chamber and the lower part of the cyclone separation chamber are both located inside the filter housing. The collection chamber is provided with a drain outlet and a sewage outlet, with the drain outlet being higher than the sewage outlet. The drain outlet is equipped with a baffle to prevent particles from being discharged from the drain outlet.

[0031] A method for using an integrated high-pressure impurity removal and sand filtering device includes the following steps:

[0032] When the integrated high-pressure impurity removal and sand filtering device is used for wellhead natural gas pretreatment, a cooling medium is first introduced into the temperature control chamber to pre-cool the adsorption plate and keep the adsorption plate cooled by the cooling medium throughout the use process; then the natural gas is introduced into the integrated high-pressure impurity removal and sand filtering device, and enters the buffer chamber, cyclone separation chamber and filter shell in sequence, and undergoes buffering and deceleration, cyclone separation and adsorption separation in sequence, and finally discharged from the gas outlet on the filter shell;

[0033] When the integrated high-pressure impurity removal and sand filtering device is not in use, a heating medium is introduced into the temperature control chamber to preheat the adsorption plate, and then a cleaning medium is introduced into the adsorption plate to clean it.

[0034] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0035] 1. The high-pressure impurity removal and sand filtering integrated device of the present invention mainly includes a buffer chamber, a cyclone centrifugal separation chamber, and a filter shell capable of adsorption separation. It can sequentially perform buffering and deceleration, cyclone separation, and adsorption separation, realizing three-stage separation. The buffer chamber is used to buffer the flow of natural gas at the wellhead to adapt to the high pressure conditions and alleviate the problem of erosion of the desander caused by the high pressure of natural gas at the wellhead outlet. The cyclone centrifugal separation chamber can separate most of the heavier, high-viscosity flocculent floating matter, formation water, and mud and sand. Adsorption separation can achieve secondary separation of formation water in natural gas by the impact of natural gas moving with the adsorption plate and the low temperature of the adsorption plate, as well as effectively separate high-viscosity flocculent floating matter in natural gas, thereby improving the separation effect of natural gas.

[0036] 2. The adsorption plate of the present invention utilizes low temperature combined with a rough surface to achieve adsorption and separation of high-viscosity flocculent floating matter entrained in natural gas; the present invention can also utilize high temperature and water flow to wash away the high-viscosity flocculent floating matter on the adsorption plate, thereby achieving automatic cleaning of the adsorption plate and restoring its adsorption and separation function.

[0037] 3. This invention, by installing a flow-slowing component between the inlet and outlet pipes within the buffer chamber, effectively blocks the natural gas, thereby improving the buffer chamber's slowing effect on the wellhead natural gas. This allows more impurities to settle within the buffer chamber, reducing the separation pressure of the cyclone desander. Furthermore, in an optimized embodiment, the flow-slowing column includes an outer shell, within which a detachable filter frame is installed. The filter frame is filled with adsorption packing material, which adsorbs a portion of the high-viscosity flocculent floating matter, preventing corrosion of the cyclone desander by the high-viscosity flocculent floating matter. The use of adsorption packing material and subsequent low-temperature adsorption plates further improves the separation effect of high-viscosity flocculent floating matter in natural gas. Moreover, the flow-slowing component is detachably installed within the buffer chamber, facilitating the replacement of the adsorption packing material and maintaining its adsorption effect. Attached Figure Description

[0038] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 This is a schematic diagram of the integrated high-pressure impurity removal and sand filtering device of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the adsorption plate of the present invention;

[0041] Figure 3 This is a top view of the buffer chamber in Embodiment 1 of the present invention;

[0042] Figure 4 This is a schematic diagram of the flow-slowing component in Embodiment 1 of the present invention;

[0043] Figure 5 This is a schematic diagram of the slow-flow column in Embodiment 5 of the present invention;

[0044] Figure 6 This is a top view of the buffer chamber in Embodiment 2 of the present invention;

[0045] Figure 7 This is a top view of the buffer chamber in Embodiment 3 of the present invention.

[0046] The attached diagram shows the markings and corresponding component names:

[0047] 1-Filter housing; 2-Buffer chamber; 3-Cyclone separation chamber; 4-Adsorption plate; 5-Filter assembly; 6-Cyclone sand separator; 7-Collection chamber; 8-Slow flow assembly; 9-First connector; 10-Connecting pipe; 11-Air outlet; 12-Drain outlet; 21-Air inlet pipe; 22-Air outlet pipe; 23-Annular plate; 41-Second connector; 42-Temperature control chamber; 43-Cleaning chamber; 44-Water inlet; 61-Air inlet connector; 62-Connecting pipe; 71-Drain outlet; 72-Baffle; 81-Base; 82-Annular guide plate; 83-Slow flow column; 84-Hollow cylinder; 85-Strip baffle; 91-Main pipe; 92-Cooling pipe; 93-Heating pipe; 94-Cooling valve; 95-Heating valve; 831-Outer shell; 832-Filter frame; 833-Protruding rib; 834-Adsorption packing. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. The embodiments described below are some, but not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0049] In the following description, numerous specific details are set forth to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, materials, or methods are not specifically described to avoid obscuring the invention. Unless otherwise specified, the materials, instruments, and reagents used in the following embodiments are commercially available. Unless otherwise specified, the techniques used in the embodiments are conventional methods well known to those skilled in the art.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] Example 1:

[0052] For depressurization of natural gas at the wellhead, in addition to considering separation efficiency—that is, the ability to effectively separate mud, sand, high-viscosity flocculent matter, and formation water from the natural gas—it is also necessary to consider factors such as the damage to the equipment caused by wellhead pressure and the equipment's footprint. Because natural gas contains high-viscosity flocculent matter, existing technologies have poor separation effects on this material. Therefore, this embodiment provides an integrated high-pressure impurity removal and sand filtering device, such as… Figures 1-4 As shown, it includes:

[0053] Buffer chamber 2 is used to receive natural gas exported from the wellhead. Buffer chamber 2 is equipped with an inlet pipe 21 and an outlet pipe 22. The inlet pipe 21 is used to connect to the natural gas inlet and introduce the extracted natural gas into the buffer chamber 2. The buffer chamber 2 uses its large capacity to depressurize and slow down the natural gas. The slowed natural gas is then exported through the outlet pipe 22.

[0054] In a preferred embodiment, to enhance the slowing effect on natural gas, the inlet pipe 21 and outlet pipe 22 of the buffer chamber 2 are arranged opposite each other; a flow-regulating component 8 is installed between the inlet pipe 21 and outlet pipe 22 within the buffer chamber 2, utilizing the obstruction effect of the flow-regulating component 8 to further slow down the natural gas within the buffer chamber 2; such as Figures 3-4 As shown, in this embodiment, the flow-retarding component 8 includes multiple flow-retarding columns 83. Preferably, the multiple flow-retarding columns 83 have overlapping portions in the radial direction, preventing the inlet pipe 21 and the outlet pipe 22 from being directly connected, i.e., there is no straight gap between the inlet pipe 21 and the outlet pipe 22; the lateral width of the multiple flow-retarding columns 83 is greater than the diameter of the inlet pipe 21, so that natural gas must bypass the flow-retarding columns 83 before being discharged from the buffer chamber 2, thereby improving the blocking effect on natural gas; in this embodiment, the inlet pipe 21 and the outlet pipe 22 have the same size, such as... Figure 3 As shown, the lateral width of the multiple flow-slowing columns 83 refers to Figure 3 The diameter of the circle formed by the seven slow-flow columns 83 shown in the figure.

[0055] In a preferred embodiment, to facilitate replacement or maintenance of the flow-slowing component 8, the top of the buffer chamber 2 has an opening, and an annular plate 23 is fitted at the opening. The flow-slowing component 8 also includes a base 81, on which the flow-slowing column 83 is mounted. The base 81 and the annular plate 23 can be connected by bolts. Preferably, an annular guide plate 82 is provided on the base 81 on the side of the flow-slowing column 83. After the flow-slowing component 8 is installed, the annular guide plate 82 is positioned inside the annular plate 23, and during installation, the annular guide plate 82 has a guiding function.

[0056] Cyclone separation chamber 3 is equipped with a cyclone desander 6 connected to buffer chamber 2. The cyclone desander 6 has an air inlet connector 61, which passes through the side wall of the air inlet connector 61 and is connected to the air outlet pipe 22. The cyclone desander 6 has a top outlet and a bottom slag discharge port. The separated natural gas is discharged from the top outlet into the cyclone separation chamber 3, and the separated mud, sand, high-viscosity flocculent floating matter and formation water are discharged from the bottom slag discharge port.

[0057] The filter housing 1 is connected to the cyclone separation chamber 3 and is used to receive natural gas separated by the cyclone sand separator 6; the buffer chamber 2 and the cyclone separation chamber 3 are both integrated on the filter housing 1.

[0058] In a specific case, buffer chamber 2 and cyclone separation chamber 3 are arranged sequentially along the axial direction on filter shell 1. Buffer chamber 2 is installed on top of buffer chamber 2, and cyclone separation chamber 3 is vertically inserted through the top of filter shell 1. The top of cyclone separation chamber 3 is located outside the filter shell 1 and is connected to the inside of the filter shell 1 through a connecting pipe. The lower part of cyclone separation chamber 3 is placed inside the filter shell 1, and the bottom of cyclone sand remover 6 extends out of the bottom of cyclone separation chamber 3.

[0059] In a preferred embodiment, to quickly remove the mud, sand, high-viscosity flocculent matter, and formation water separated by the cyclone separator 6, a collection chamber 7 is provided below the cyclone separator 6. The collection chamber 7 is vertically inserted through the bottom of the filter shell 1, with its upper part placed inside the filter shell 1 and its top open to collect the mud, sand, and other particles, as well as the formation water, separated by the cyclone separator 6. The lower part of the collection chamber 7 is placed outside the filter shell 1, and a drain outlet 71 and a sludge outlet are provided on the lower part of the collection chamber 7. The drain outlet 71 is higher than the sludge outlet. Preferably, a baffle 72 is provided with the drain outlet 71 to prevent particles from being discharged from the drain outlet 71. Figure 1 As shown, the baffle 72 is an L-shaped plate, with the horizontal end of the L-shaped plate connected to the inner wall of the collection chamber 7 and positioned above the drain outlet 71.

[0060] An adsorption separation assembly is disposed within the filter housing 1. The assembly includes multiple adsorption plates 4 arranged in a staggered pattern along the airflow direction. The outer wall of each adsorption plate 4 has a rough surface, and each plate has a temperature control cavity 42. In this embodiment, the staggered arrangement means that there is a gap between adjacent adsorption plates 4, and the heights of the multiple adsorption plates 4 are not uniform. This facilitates sufficient contact between the natural gas and the adsorption plates 4. Figure 1 As shown, the adsorption separation assembly includes three adsorption plates 4. The adsorption plates 4 utilize low temperature combined with a rough surface to achieve the adsorption and separation of high-viscosity flocculent floating matter entrained in natural gas.

[0061] The temperature control component is used to introduce a cooling medium or a heating medium into the temperature control cavity 42 to cool or heat the adsorption plate 4. The temperature control component includes a cooling end and a heating end, wherein the cooling end is used to provide a cooling medium and the heating end is used to provide a heating medium. The cooling medium can be a low-temperature gas that can cool the adsorption plate 4 to -5 to -10°C, and the heating medium can be steam, etc.

[0062] In a specific example, the temperature control chamber 42 is equipped with a first connector 9, which includes a main pipe 91 communicating with the temperature control chamber 42. A cooling pipe 92 and a heating pipe 93 are connected to the main pipe 91. A cold medium circulation loop is formed between the cooling pipe 92 and the cooling supply end of the temperature control component; a hot medium circulation loop is formed between the heating pipe 93 and the heating supply end of the temperature control component. A cooling valve 94 and a heating valve 95 are respectively installed on the cooling pipe 92 and the heating pipe 93. The temperature control component also includes a control unit containing a controller, which controls the opening and closing of the cooling valve 94 and the heating valve 95. When cooling of the adsorption plate 4 is required, the controller controls the cooling valve 94 to open and the heating valve 95 to close, i.e., the cold medium circulation loop is open and the hot medium circulation loop is closed. When heating of the adsorption plate 4 is required, the controller controls the cooling valve 94 to close and the heating valve 95 to open, i.e., the cold medium circulation loop is closed and the hot medium circulation loop is open.

[0063] The adsorption separation principle of the adsorption separation component in this embodiment is as follows:

[0064] During the movement of natural gas, the formation water entrained in the natural gas impacts the adsorption plate 4, causing it to break down and fall to the bottom of the filter shell 1. Furthermore, since the viscosity of high-viscosity flocculent floating matter changes with temperature (the lower the temperature, the higher the viscosity, and the higher the temperature, the lower the viscosity), the adsorption plate 4 in this embodiment can be regulated by a temperature control component. During adsorption separation, by cooling the adsorption plate 4, when the high-viscosity flocculent floating matter entrained in the natural gas impacts the lower-temperature adsorption plate 4, on the one hand, the impact reduces the speed, and on the other hand, the low temperature increases the viscosity. Combined with the rough surface of the adsorption plate 4, the high-viscosity flocculent floating matter entrained in the natural gas adheres to the adsorption plate 4, achieving separation from the natural gas. At the same time, the mud and sand will further settle inside the filter shell 1. After impacts from multiple adsorption plates 4, the mud and sand, high-viscosity flocculent floating matter, and formation water entrained in the natural gas can be almost completely separated.

[0065] In this embodiment, multiple adsorption plates 4 in the adsorption separation component are connected in series through connecting pipes 10, so that multiple temperature control chambers 42 are connected, and the first and last adsorption plates 4 are both equipped with first connectors 9.

[0066] In this embodiment, an air outlet 11 is provided at the rear end of the adsorption separation component at the top of the filter housing 1; a liquid drain outlet 12 is provided at the bottom of the filter housing 1. Preferably, a filter assembly 5 is also provided inside the filter housing 1 below the air outlet 11. The filter assembly 5 can be a foam mesh filter or an adsorption packing filter.

[0067] The method of using the integrated high-pressure impurity removal and sand filtering device in this embodiment includes the following steps:

[0068] When the integrated high-pressure impurity removal and sand filtering device is used for wellhead natural gas pretreatment, a cooling medium is first introduced into the temperature control chamber 42 to pre-cool the adsorption plate 4, which can be pre-cooled to -5-10℃ and keep the adsorption plate 4 cooled by the cooling medium during use; then the natural gas is introduced into the integrated high-pressure impurity removal and sand filtering device, and enters the buffer chamber 2, cyclone separation chamber 3 and filter shell 1 in sequence, and undergoes buffering and deceleration, cyclone separation and adsorption separation in sequence, and finally discharged from the gas outlet 11 on the filter shell 1;

[0069] When the integrated high-pressure impurity removal and sand filtering device is not in use, a heating medium is introduced into the temperature control chamber 42 to preheat the adsorption plate 4, and then a cleaning medium is introduced onto the adsorption plate 4 to clean it.

[0070] Example 2:

[0071] like Figure 6As shown, this embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that the structure of the flow control component 8 is different. In this embodiment, the flow control component 8 is a hollow cylinder 84. The outer diameter of the hollow cylinder 84 is larger than the diameter of the inlet pipe 21 and smaller than the inner diameter of the buffer chamber 2. After natural gas enters the buffer chamber 2, it can be discharged through the gap between the hollow cylinder 84 and the buffer chamber 2. The hollow cylinder 84 also plays a role in blocking natural gas.

[0072] In a preferred embodiment, the hollow cylinder 84 has several through holes on its sidewall.

[0073] Example 3:

[0074] like Figure 7 As shown, this embodiment is based on embodiment 1, and the difference between the two is that the structure of the flow control component 8 is different. In this embodiment, the flow control component 8 is a strip baffle 85. The width of the strip baffle 85 is greater than the diameter of the air inlet pipe 21, and the flow control is achieved by using the blocking effect of the strip baffle 85.

[0075] In a preferred embodiment, the strip baffle 85 is a corrugated plate or a flat plate with several protrusions on it; the above arrangement can increase the surface area of ​​the strip baffle 85 and improve its blocking effect on natural gas.

[0076] In a preferred embodiment, the strip baffle 85 is provided with several through holes.

[0077] Example 4:

[0078] This embodiment is based on Embodiment 1, but differs in that each adsorption plate 4 is equipped with two first connectors 9, which serve as the air inlet and outlet, respectively. Specifically, one first connector 9 is connected to the top of the adsorption plate 4, and the other is connected to the side wall of the adsorption plate 4. Figure 1 The back side of the location shown.

[0079] Example 5:

[0080] like Figures 1-5As shown, this embodiment is based on embodiment 1. This embodiment optimizes the design of the buffer component 8, which can not only achieve buffering and pressure reduction, but also achieve preliminary separation of natural gas. Specifically, the slow-flow column 83 includes a shell 831, and a filter frame 832 is detachably installed inside the shell 831. The filter frame 832 is filled with adsorption packing material 834. The adsorption packing material 834 is an existing material that can adsorb high-viscosity flocculent floating matter, specifically activated carbon, activated alumina, or polyurethane foam, etc. The shell 831 is provided with several second through holes. Natural gas enters the adsorption packing material 834 through the second through holes, and the high-viscosity flocculent floating matter entrained can be adsorbed by the adsorption packing material 834. The outer side of the filter frame 832 is provided with multiple protrusions 833 along the circumferential direction. The multiple protrusions 833 realize the gap between the adsorption packing material 834 and the shell 831, which can ensure that the natural gas can pass through the slow-flow column 83 relatively quickly.

[0081] In this embodiment, part of the natural gas entering the buffer chamber 2 is discharged through the gap between multiple slow-flow columns 83, and part is discharged after adsorption and filtration by the adsorption packing 834.

[0082] In a specific case, one end of the housing 831 is fixed to the base 81, and the other end is an open end through which the filter frame 832 can be inserted. The open end can be used with an end cap with a threaded connection to fix the filter frame 832.

[0083] In this embodiment, the adsorption effect of the adsorption packing can be used to adsorb a portion of the high-viscosity flocculent floating matter, thus avoiding the corrosion of the cyclone sand separator 6 by the high-viscosity flocculent floating matter. The adsorption of the adsorption packing and the subsequent low-temperature adsorption plate 4 can further improve the separation effect of high-viscosity flocculent floating matter in natural gas. Moreover, the slow flow component 8 is detachably installed in the buffer chamber 2, which facilitates the replacement of the adsorption packing and maintains its adsorption effect.

[0084] Example 6:

[0085] like Figure 2 As shown, this embodiment is based on embodiment 1. In this embodiment, the adsorption plate 4 is provided with a cleaning chamber 43 outside the temperature control chamber 42. The cleaning chamber 43 is an annular cavity, and a plurality of first through holes are provided on the bottom and outer wall of the annular cavity. The adsorption plate 4 is provided with a water inlet 44 that communicates with the cleaning chamber 43, and cleaning water is introduced into the cleaning chamber 43 through the water inlet 44. A water inlet valve is provided on the water inlet 44, and the water inlet valve is controlled by the control unit to start, stop and open.

[0086] In order to improve the performance of the adsorption plate 4, it is necessary to clean the adsorption plate 4 regularly. On the one hand, the viscosity of the high-viscosity flocculent floating matter can be reduced by heating the adsorption plate 4, which facilitates its detachment from the adsorption plate. On the other hand, the adsorption plate 4 is cleaned by introducing cleaning water into the cleaning chamber 43 and using the water flow as a medium to remove the high-viscosity flocculent floating matter with reduced viscosity from the adsorption plate 4, thereby improving the cleaning effect of the adsorption plate 4.

[0087] In a preferred embodiment, the top of the annular cavity is an open end. The cleaning water inside the annular cavity can overflow through the top opening to rinse the outer wall of the annular cavity, thereby improving the cleaning effect on the adsorption plate 4.

[0088] In a preferred embodiment, the first through hole on the outer wall of the annular cavity is inclined, with the outer end of the first through hole facing downward, which is beneficial for improving the cleaning effect on the adsorption plate 4.

[0089] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0090] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

Claims

1. An integrated high-pressure impurity removal and sand filtering device, characterized in that, include: A buffer chamber (2) is used to receive natural gas exported from the wellhead; the inlet pipe (21) and outlet pipe (22) of the buffer chamber (2) are arranged opposite to each other; a flow-slowing component (8) is provided between the inlet pipe (21) and outlet pipe (22) in the buffer chamber (2), and the flow-slowing component (8) is used to further slow down the natural gas in the buffer chamber (2) by blocking the flow. Cyclone separation chamber (3), which is equipped with a cyclone sand separator (6) connected to the buffer chamber (2); The filter housing (1) is connected to the cyclone separation chamber (3) and is used to receive the natural gas separated by the cyclone desander (6); The adsorption separation component includes multiple adsorption plates (4) arranged in a staggered pattern along the airflow direction; the outer wall of the adsorption plate (4) is rough, and the adsorption plate (4) has a temperature control cavity (42); when performing wellhead natural gas pretreatment, a cooling medium is first introduced into the temperature control cavity (42) to pre-cool the adsorption plate (4) to -5-10℃, and the adsorption plate (4) is kept cooled by the cooling medium during use. When the high-viscosity flocculent floating matter entrained in the natural gas impacts the adsorption plate (4) at a lower temperature, on the one hand, the speed decreases due to the impact, and on the other hand, the viscosity increases due to the low temperature. Combined with the rough surface of the adsorption plate (4), the high-viscosity flocculent floating matter entrained in the natural gas adheres to the adsorption plate (4), thereby achieving separation from the natural gas. A temperature control component is used to introduce a cooling medium or a heating medium into the temperature control cavity (42) to cool or heat the adsorption plate (4); The buffer chamber (2) and the cyclone separation chamber (3) are both integrated on the filter shell (1); the buffer chamber (2) and the cyclone separation chamber (3) are arranged sequentially along the axial direction on the filter shell (1), the buffer chamber (2) is installed on the top of the filter shell (1), and the cyclone separation chamber (3) is vertically inserted through the top of the filter shell (1).

2. The integrated high-pressure impurity removal and sand filtering device according to claim 1, characterized in that, The temperature control chamber (42) is equipped with a first connector (9), which includes a main pipe (91) communicating with the temperature control chamber (42). A cooling pipe (92) and a heating pipe (93) are connected to the main pipe (91). The cooling pipe (92) and the temperature control component form a cold medium circulation loop. The heating pipe (93) and the temperature control component form a hot medium circulation loop.

3. The integrated high-pressure impurity removal and sand filtering device according to claim 2, characterized in that, The cooling pipe (92) and heating pipe (93) are respectively provided with a cooling valve (94) and a heating valve (95); the temperature control component also includes a control unit, which is used to control the start, stop and opening degree of the cooling valve (94) and the heating valve (95).

4. The integrated high-pressure impurity removal and sand filtering device according to claim 2, characterized in that, The adsorption separation assembly consists of multiple adsorption plates (4) connected in series via connecting pipes (10) to connect multiple temperature control chambers (42), and each of the first and last adsorption plates (4) is equipped with a first connector (9).

5. The integrated high-pressure impurity removal and sand filtering device according to claim 2, characterized in that, Each of the adsorption plates (4) is provided with a first connector (9).

6. The integrated high-pressure impurity removal and sand filtering device according to claim 1, characterized in that, The adsorption plate (4) has a cleaning chamber (43) on the outside of the temperature control chamber (42). The cleaning chamber (43) is an annular cavity, and several first through holes are provided on the bottom and outer wall of the annular cavity. The adsorption plate (4) has a water inlet (44) communicating with the cleaning chamber (43), and cleaning water is introduced into the cleaning chamber (43) through the water inlet (44).

7. The integrated high-pressure impurity removal and sand filtering device according to claim 6, characterized in that, The top of the annular cavity is an open end; a water inlet valve is provided on the water inlet (44), and the water inlet valve is controlled by the control unit to start / stop and open / close.

8. The integrated high-pressure impurity removal and sand filtering device according to claim 6, characterized in that, The first through hole on the outer wall of the annular cavity is inclined, with the outer port of the first through hole facing downward.

9. The integrated high-pressure impurity removal and sand filtering device according to claim 1, characterized in that, The flow-slowing component (8) includes multiple flow-slowing columns (83), hollow cylinders (84), or strip baffles (85); the strip baffles (85) include corrugated plates or have several protrusions on a flat plate.

10. The integrated high-pressure impurity removal and sand filtering device according to claim 9, characterized in that, Multiple flow-slowing columns (83) have overlapping portions in the radial direction, preventing the intake pipe (21) and the exhaust pipe (22) from being directly connected; the lateral width of the multiple flow-slowing columns (83) is greater than the diameter of the intake pipe (21); the outer diameter of the hollow cylinder (84) is greater than the diameter of the intake pipe (21); the width of the strip baffle (85) is greater than the diameter of the intake pipe (21).

11. The integrated high-pressure impurity removal and sand filtering device according to claim 9, characterized in that, The top of the buffer chamber (2) has an opening, and an annular plate (23) is provided at the opening; the flow-slowing assembly (8) also includes a base (81), the flow-slowing column (83), the hollow cylinder (84), and the strip baffle (85) are mounted on the base (81), and the base (81) is detachably connected to the annular plate (23); an annular guide plate (82) is provided on the base (81) on the outside of the flow-slowing column (83), the hollow cylinder (84), or the strip baffle (85).

12. The integrated high-pressure impurity removal and sand filtering device according to claim 9, characterized in that, The slow-flow column (83) includes a shell (831), a filter frame (832) is detachably provided inside the shell (831), the filter frame (832) is filled with adsorption filler (834), and a number of second through holes are provided on the shell (831); a number of protrusions (833) are provided on the outer side of the filter frame (832) along the circumferential direction.

13. The integrated high-pressure impurity removal and sand filtering device according to any one of claims 1-12, characterized in that, The filter housing (1) is also provided with a collection chamber (7), which is located below the cyclone separation chamber (3) and is used to collect particles and moisture separated by the cyclone sand separator (6). The upper part of the collection chamber (7) and the lower part of the cyclone separation chamber (3) are both located inside the filter housing (1). The collection chamber (7) is provided with a drain outlet (71) and a sewage outlet. The height of the drain outlet (71) is higher than that of the sewage outlet. The drain outlet (71) is equipped with a baffle (72) to prevent particles from being discharged from the drain outlet (71).

14. The method of using the integrated high-pressure impurity removal and sand filtering device as described in any one of claims 1-13, characterized in that, Includes the following steps: When the integrated high-pressure impurity removal and sand filtering device is used for wellhead natural gas pretreatment, a cooling medium is first introduced into the temperature control chamber (42) to pre-cool the adsorption plate (4) and keep the adsorption plate (4) cooled by the cooling medium during use; then the natural gas is introduced into the integrated high-pressure impurity removal and sand filtering device, and enters the buffer chamber (2), the cyclone separation chamber (3) and the filter shell (1) in sequence, and is buffered and decelerated, cyclone separated and adsorbed in sequence, and finally discharged from the gas outlet (11) on the filter shell (1); When the high-pressure impurity removal and sand filtering integrated device is not in use, a heating medium is introduced into the temperature control chamber (42) to preheat the adsorption plate (4), and then a cleaning medium is introduced into the adsorption plate (4) to clean the adsorption plate (4).

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