CN112267868B - Impurity removal system and impurity removal method for shale gas well - Google Patents
Impurity removal system and impurity removal method for shale gas well Download PDFInfo
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Abstract
本发明属于页岩气开采技术领域，具体涉及一种用于页岩气井的除杂系统及除杂方法。用于页岩气井的除杂系统，包括页岩气的进气端、页岩气的输出端和若干连接管道，还包括旋流分离器、储杂筒一和过滤分离器一，旋流分离器与储杂筒一相连，储杂筒一与过滤分离器一相连，且旋流分离器为至少一个，过滤分离器一为至少一个。本系统采用旋流分离器与过滤分离器的组合方式对页岩气进行除杂，先采用旋流分离器对页岩气进行第一级分离，再通过过滤分离器对页岩气进行第二级分离，且对页岩气进行除杂时，在每一级除杂中可以进行至少一次分离，使得页岩气能够在本系统中进行两级多次分离，进而能够提高对页岩气的除杂效果。
The invention belongs to the technical field of shale gas exploitation, and in particular relates to an impurity removal system and an impurity removal method for shale gas wells. The impurity removal system for shale gas wells, including the inlet end of shale gas, the output end of shale gas and several connecting pipes, also includes a cyclone separator, a storage tank 1 and a filter separator 1, cyclone separation The first one is connected with the impurity storage cylinder, and the first impurity storage cylinder is connected with the first filter separator, and there is at least one cyclone separator and at least one filter separator. This system uses a combination of cyclone separator and filter separator to remove impurities from shale gas. First, the shale gas is first separated by the cyclone separator, and then the second shale gas is separated by the filter separator. In addition, when removing impurities from shale gas, at least one separation can be performed in each stage of impurity removal, so that shale gas can be separated in two stages and multiple times in this system, thereby improving the efficiency of shale gas. Impurity removal effect.
Description
Technical Field
The invention belongs to the technical field of shale gas exploitation, and particularly relates to an impurity removal system and an impurity removal method for a shale gas well.
Background
The formation and enrichment of shale gas have unique characteristics, and the shale gas is often distributed in shale hydrocarbon source rock formations with large thickness and wide distribution in basins.
The shale gas contains a large amount of sand grains, water and other impurities, the impurities abrade pipelines, equipment and instruments and block valves and pipelines in the process of exploiting the shale gas, and the existence of the impurities can rapidly damage the valves and various equipment on the pipelines, greatly increase the operation cost and even influence the normal production. Therefore, when the shale gas is exploited, the shale gas is usually subjected to impurity removal treatment. However, the impurity removal mode adopted at present cannot effectively separate impurities such as sand grains, water and the like from the shale gas, and the impurity removal effect is poor.
Disclosure of Invention
The invention aims to provide an impurity removal system and an impurity removal method for a shale gas well, aiming at the problems that in the prior art, when shale gas is mined, the existing impurity removal mode is poor in effect and cannot effectively separate impurities from the shale gas.
In order to achieve the above purpose, the invention provides the following technical scheme:
the impurity removal system for the shale gas well comprises a shale gas inlet end, a shale gas outlet end, a plurality of connecting pipelines, a cyclone separator, a first impurity storage cylinder and a first filtering separator, wherein the cyclone separator is at least one, the cyclone separator is sequentially marked with numbers of 1, 2,3 … … K … … N, K is any value from 1 to N, the inlet end of the first cyclone separator is communicated with the gas inlet end through a pipeline, the inlet end of the K-th cyclone separator is communicated with the outlet end of the K-1-th cyclone separator through a pipeline, and the outlet end of the N-th cyclone separator is communicated with the inlet end of the first impurity storage cylinder through a pipeline; the number of the first filtering separator is at least one, the first filtering separator is sequentially marked as 1, 2,3 … … K … … N, K is any value from 1 to N, the outlet end of the first impurity storage cylinder is communicated with the inlet end of the first filtering separator through a pipeline, the inlet end of the first K filtering separator is communicated with the outlet end of the first K-1 filtering separator through a pipeline, and the outlet end of the first N filtering separator is communicated with the output end through a pipeline.
In the impurity removal system for the shale gas well, shale gas enters the cyclone separator from the gas inlet end for first-stage separation, impurities such as separated sand grains and water enter the impurity storage cylinder I, and the outlet end of the impurity storage cylinder I is communicated with the inlet end of the filtering separator I, so that the impurities such as the sand grains and the water separated by the first stage can enter the filtering separator I for second-stage separation; the system adopts the combined mode of the cyclone separator and the filtering separator to remove impurities from the shale gas, firstly adopts the cyclone separator to carry out primary separation on the shale gas, and then adopts the filtering separator to carry out secondary separation on the shale gas, so that the impurities in the shale gas can be effectively separated. In addition, in this system, cyclone is at least one, and filter separator one is at least one to when carrying out the edulcoration to shale gas through this system, can carry out separation at least once in each grade edulcoration, make shale gas can carry out two-stage multiple separation in this system, and then can further improve the edulcoration effect of this system to shale gas.
In addition, in the system, the first impurity storage cylinder can be arranged below the cyclone separator, so that impurities separated in the cyclone separator can be conveniently collected; can set up filter separator one in the top of storing up miscellaneous section of thick bamboo one to can be under the effect of gravity, be difficult for making impurity get into filter separator one, and then can further improve the edulcoration effect to shale gas.
Furthermore, the impurity removing system for the shale gas well further comprises a second impurity storage cylinder and a second filtering separator, wherein the number of the second filtering separator is at least one, the second filtering separator is sequentially marked as 1, 2,3 … … K … … N, K is any value from 1 to N, the inlet end of the second first filtering separator is communicated with the Nth cyclone separator through a pipeline, the inlet end of the second Kth filtering separator is communicated with the outlet end of the second Kth filtering separator 1 through a pipeline, and the outlet end of the second Nth filtering separator is communicated with the output end through a pipeline; and the second impurity storage cylinder is positioned below the second filtering separator, and the inlet end of the second impurity storage cylinder is communicated with the bottom of the second N filtering separator through a pipeline.
The system is also provided with a second filtering separator which is communicated with the cyclone separator through a pipeline. Therefore, the shale gas subjected to the first-stage separation through the cyclone separator can enter a second filtering separator through a pipeline for second-stage separation, and is conveyed to the output end of the shale gas through the pipeline after being separated in the second filtering separator. The impurity through the separation of the second filtering separator is collected by the second impurity storage cylinder, and the second impurity storage cylinder is located below the second filtering separator, so that the impurity removing effect on the shale gas can be further improved under the action of gravity.
When the moisture content in the shale gas is more, carry out first grade separation through cyclone, the shale gas after the separation passes through the pipeline and gets into filter separator two, and the shale gas after the separation can take more moisture to filter separator two and then the second grade separation, impurity such as sand grain and moisture after the second grade separation is collected by storing miscellaneous section of thick bamboo two, for the mode of carrying out the second grade separation by filter separator one entirely, can slow down the speed that stores miscellaneous section of thick bamboo one and fill up through filter separator two.
Furthermore, a first gate valve is arranged on a pipeline between the first impurity storage barrel and the Nth cyclone separator, and a second gate valve is arranged on a pipeline between the Nth cyclone separator and the second first filtering separator.
The system is also provided with a first gate valve and a second gate valve, so that when the first filtering separator is stopped, only the second filtering separator is subjected to second-stage separation in a mode of closing the gate valves and opening the second gate valve; when the second filtering separator stops, the first filtering separator can only carry out second-stage separation in a mode of closing the second gate valve and opening the first gate valve. Furthermore, the system can realize the uninterrupted operation of the shale gas.
Further, the impurity removing system for the shale gas well further comprises a fluid inlet end and an impurity collecting device, a third gate valve is arranged on a pipeline between the first impurity storage cylinder and the first filtering separator, a fourth gate valve is arranged on a pipeline between the second impurity storage cylinder and the second N filtering separator, and the fourth gate valve is configured as follows: the first impurity storage cylinder and the second impurity storage cylinder are respectively communicated with the fluid inlet end through pipelines, the first impurity storage cylinder and the second impurity storage cylinder are respectively communicated with the impurity collecting device through pipelines, and a fifth gate valve is arranged on the pipeline connecting the first impurity storage cylinder and the impurity collecting device and the pipeline connecting the second impurity storage cylinder and the impurity collecting device.
Further, the impurity removing system for the shale gas well further comprises a fluid inlet end and an impurity collecting device, a third gate valve is arranged on a pipeline between the first impurity storage cylinder and the first filtering separator, a fourth gate valve is arranged on a pipeline between the second impurity storage cylinder and the second N filtering separator, and the fourth gate valve is configured as follows: the first impurity storage cylinder is communicated with the second impurity storage cylinder through a pipeline, a gate valve six is arranged on the pipeline between the first impurity storage cylinder and the second impurity storage cylinder, one of the first impurity storage cylinder and the second impurity storage cylinder is communicated with the fluid inlet end through a pipeline, the other one of the first impurity storage cylinder and the second impurity storage cylinder is communicated with the impurity collecting device through a pipeline, and a gate valve five is arranged on the pipeline connected with the impurity collecting device.
In the system, fluid is injected into the first impurity storage cylinder and/or the second impurity storage cylinder through the fluid inlet end, so that impurities in the first impurity storage cylinder and/or the second impurity storage cylinder can be cleaned conveniently; the impurity collecting device is convenient for uniformly collecting impurities in the first impurity storage cylinder and/or the second impurity storage cylinder, so that the impurities in the first impurity storage cylinder and/or the second impurity storage cylinder are prevented from leaking to pollute the environment.
Furthermore, a drain valve is arranged on a pipeline connected with the impurity collecting device, and the drain valve is positioned between the gate valve six and the impurity collecting device. Through above-mentioned structure, can guarantee to store up miscellaneous section of thick bamboo two and collect the sealed effect between the miscellaneous device, and then can further prevent to store up miscellaneous section of thick bamboo one and/or store the impurity in the miscellaneous section of thick bamboo two and leak and the polluted environment.
Furthermore, the impurity removing system for the shale gas well further comprises an emptying end connected with the normal pressure environment, the first impurity storage cylinder and the second impurity storage cylinder are respectively communicated with the emptying end through pipelines, a first stop valve is arranged on the pipeline between the first impurity storage cylinder and the emptying end, and a second stop valve is arranged on the pipeline between the second impurity storage cylinder and the emptying end.
Through setting the emptying end, and enabling the emptying end to be respectively connected with the first impurity storage barrel and the second impurity storage barrel, when impurities in the first impurity storage barrel and/or the second impurity storage barrel are cleaned, the pressure in the first impurity storage barrel and/or the second impurity storage barrel can be the same as the normal pressure by opening the first stop valve, and therefore the cleaning of the impurities in the first impurity storage barrel and/or the second impurity storage barrel is facilitated.
Furthermore, a first impurity storage cylinder of the impurity removal system for the shale gas well is communicated with a second impurity storage cylinder through a balance pipeline, and a second stop valve is arranged on the balance pipeline.
And the first impurity storage cylinder is communicated with the second impurity storage cylinder, and a second stop valve is arranged on a pipeline between the first impurity storage cylinder and the second impurity storage cylinder, so that the pressure in the first impurity storage cylinder can be the same as the pressure in the second impurity storage cylinder by opening the second stop valve. Therefore, before the shale gas is subjected to impurity removal, the pressure inside the first impurity storage barrel and the pressure inside the second impurity storage barrel can be balanced by opening the second stop valve, so that the pressure environment for impurity removal of the shale gas in the first filter separator is the same as the pressure environment for impurity removal of the shale gas in the second filter separator, and the impurity removal effect of the system on the shale gas can be ensured, and the safe operation of the system can be ensured.
Furthermore, a differential pressure gauge is arranged on each first filtering separator and each second filtering separator of the impurity removing system for the shale gas well; pressure gauges are arranged on the first impurity storage cylinder and the second impurity storage cylinder.
The first filtering separator and the second filtering separator can be detected through a differential pressure gauge, whether blockage occurs or not can be detected; the pressure condition in the first impurity storage cylinder and the pressure condition in the second impurity storage cylinder can be detected through the pressure gauge. Furthermore, the differential pressure gauge and the pressure gauge are convenient for an operator to monitor the condition of the system during operation.
On the other hand, the invention also provides an impurity removal method, based on the impurity removal system for the shale gas well, which comprises an impurity removal process and an impurity cleaning process,
the impurity removal process comprises the following steps of,
the pressure in the first impurity storage cylinder and the pressure in the second impurity storage cylinder are adjusted to be the same,
the shale gas is input into a cyclone separator from the gas inlet end for separation,
inputting the separated impurities and shale gas into a first filtering separator and/or a second filtering separator for separation,
inputting and outputting the shale gas separated by the first filtering separator and/or the shale gas separated by the second filtering separator and collecting the shale gas;
the process of cleaning the impurities comprises the following steps,
blocking a pipeline between the first impurity storage cylinder and the cyclone separator and blocking a pipeline between the first impurity storage cylinder and the first filtering separator,
the pressure in the first impurity storage cylinder is adjusted to normal pressure,
inputting the fluid into the first impurity storage cylinder to clean impurities in the first impurity storage cylinder,
blocking the pipeline between the second impurity storage cylinder and the second filtering separator,
the pressure in the second impurity storage cylinder is adjusted to normal pressure,
and inputting the fluid into the second impurity storage cylinder to clean impurities in the second impurity storage cylinder.
When the impurity removal is carried out on the shale gas, the pressure inside the impurity storage cylinder I and the pressure inside the impurity storage cylinder II are balanced firstly, so that the impurity removal pressure environment of the shale gas in the first filtering separator is the same as the impurity removal pressure environment of the shale gas in the second filtering separator, the impurity removal effect of the system on the shale gas can be ensured, and the safe operation of the system can be ensured; then, the shale gas is subjected to two-stage multiple impurity removal through a cyclone separator and a filtering separator respectively, so that impurities in the shale gas can be effectively removed; and finally, collecting the shale gas subjected to impurity removal.
When impurities are cleaned, a pipeline for communicating the first impurity storage cylinder and/or the second impurity storage cylinder with external equipment is blocked, and then the impurities in the first impurity storage cylinder and/or the second impurity storage cylinder cannot enter the equipment when the impurities are cleaned; then, the pressure in the first impurity storage cylinder and/or the pressure in the second impurity storage cylinder are/is the same as the normal pressure, so that the cleaning of impurities in the first impurity storage cylinder and/or the second impurity storage cylinder is facilitated; and finally, enabling the fluid to enter the impurity storage cylinder I and/or the impurity storage cylinder II to clean impurities.
Therefore, the impurity removal method provided by the invention can effectively separate the impurities from the shale gas.
Compared with the prior art, the invention has the beneficial effects that:
1. the impurity removal system for the shale gas well provided by the invention can be used for separating shale gas for two stages for multiple times, so that the impurity removal effect of the shale gas can be further improved.
2. By the impurity removal system for the shale gas well, provided by the invention, the shale gas can be continuously operated.
3. The impurity removal method for the shale gas well provided by the invention can be used for carrying out two-stage multiple separation on the shale gas, so that the impurity removal effect on the shale gas can be further improved.
Description of the drawings:
FIG. 1 is a first schematic diagram of a clean-out system for a shale gas well.
FIG. 2 is a second schematic diagram of a clean out system for a shale gas well.
The labels in the figure are: 1-an air inlet end, 2-an output end, 3-a cyclone separator, 4-a impurity storage barrel I, 5-a filtering separator I, 6-an impurity storage barrel II, 7-a filtering separator II, 8-a gate valve I, 9-a gate valve II, 10-a fluid inlet end, 11-an impurity collecting device, 12-a gate valve III, 13-a gate valve IV, 14-a gate valve V, 15-a gate valve VI, 16-a blow-off valve, 17-an emptying end, 18-a stop valve I, 19-a stop valve II, 20-a differential pressure gauge, 21-a pressure gauge and 22-a balance pipeline.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, embodiment 1 provides an impurity removal system for a shale gas well, and embodiment 1 includes a shale gas inlet end 1, a shale gas outlet end 2, a plurality of connecting pipes, a cyclone separator 3, an impurity storage cylinder 1 and a filtering separator 5;
in this embodiment 1, there is at least one cyclone 3, and the cyclone 3 is sequentially numbered 1, 2,3 … … K … … N, where K is any value from 1 to N, the inlet end of the first cyclone 3 is communicated with the inlet end 1 through a pipeline, the inlet end of the K-th cyclone 3 is communicated with the outlet end of the K-1-th cyclone 3 through a pipeline, and the outlet end of the N-th cyclone 3 is communicated with the inlet end of the first trash can 4 through a pipeline. For ease of implementation, the cyclonic separator 3 may be provided as one, as shown in figure 1. In the view shown in fig. 1, the inlet end of the cyclone separator 3 is communicated with the air inlet end 1 through a pipeline, and the outlet end of the separator is communicated with the inlet end of the impurity storage cylinder I4 through a pipeline.
Further, in order to facilitate the first impurity storage barrel 4 to collect the impurities separated in the cyclone separator 3, as shown in fig. 1, the cyclone separator 3 of the embodiment 1 is disposed above the first impurity storage barrel 4.
In this embodiment 1, there is at least one first filtering separator 5, and the first filtering separator 5 is sequentially numbered 1, 2,3 … … K … … N, where K is any one of 1 to N, the outlet end of the first impurity storage cylinder 4 is communicated with the inlet end of the first filtering separator 5 through a pipeline, the inlet end of the kth filtering separator 5 is communicated with the outlet end of the K-1 filtering separator 5 through a pipeline, and the outlet end of the nth filtering separator 5 is communicated with the output end 2 through a pipeline. For convenience of implementation, as shown in fig. 1, the first filtering separator 5 may be provided as one. In the view shown in fig. 1, the inlet end of the first filtering separator 5 is communicated with the outlet end of the first impurity storage cylinder 4 through a pipeline, and the outlet end of the first filtering separator 5 is communicated with the outlet end 2 through a pipeline.
Further, in order to further improve the impurity removing effect on the shale gas, as shown in fig. 1, in this embodiment 1, a filtering separator one 5 may be disposed above the impurity storage barrel one 4. Therefore, the impurities are not easy to enter the first filtering separator 5 under the action of gravity, and the impurity removal effect on the shale gas can be further improved.
In the embodiment 1, shale gas enters the cyclone separator 3 from the gas inlet 1 to be subjected to first-stage separation, impurities such as sand, water and the like separated out enter the impurity storage cylinder I4, and the outlet end of the impurity storage cylinder I4 is communicated with the inlet end of the filtering separator I5, so that the impurities such as sand, water and the like separated out by the first stage enter the filtering separator I5 to be subjected to second-stage separation; in this embodiment 1, impurity removal is performed on the shale gas by adopting a combined mode of the cyclone separator 3 and the filter separator, the first-stage separation is performed on the shale gas by adopting the cyclone separator 3, and the second-stage separation is performed on the shale gas by the first filter separator 5, so that the impurity in the shale gas can be effectively separated. In addition, in this embodiment 1, cyclone 3 is at least one, and filter separator 5 is at least one to when carrying out the edulcoration to shale gas through this embodiment 1, can carry out at least once separation in each level edulcoration, make shale gas can carry out the separation of two-stage many times in this embodiment 1, and then can further improve the edulcoration effect of this embodiment 1 to shale gas.
As shown in fig. 1, the present embodiment 1 further includes a second impurity storage cylinder 6 and a second filtering separator 7;
in this embodiment 1, there is at least one second filtering separator 7, the second filtering separator 7 is sequentially numbered 1, 2,3 … … K … … N, where K is any one of 1 to N, the inlet end of the first filtering separator 7 is communicated with the nth cyclone 3 through a pipeline, the inlet end of the kth filtering separator 7 is communicated with the outlet end of the K-1 filtering separator 7 through a pipeline, the outlet end of the nth filtering separator 7 is communicated with the output end 2 through a pipeline, the second impurity storage cylinder 6 is located below the second filtering separator 7, and the inlet end of the second impurity storage cylinder 6 is communicated with the bottom of the nth filtering separator 7 through a pipeline. For convenience of implementation, as shown in fig. 1, the second filtering separator 7 may be provided as one. In the view shown in fig. 1, the inlet end of the second filtering separator 7 is communicated with the top of the cyclone separator 3 through a pipeline, the outlet end of the second filtering separator 7 is communicated with the inlet end of the second impurity storage cylinder 6 through a pipeline, the second impurity storage cylinder 6 is positioned below the second filtering separator 7, and the inlet end of the second impurity storage cylinder 6 is communicated with the bottom of the second filtering separator 7 through a pipeline.
In the embodiment 1, the second filtering separator 7 is arranged, and the second filtering separator 7 is communicated with the top of the cyclone separator 3 through a pipeline. Therefore, the shale gas subjected to the first-stage separation by the cyclone separator 3 can enter the second filtering separator 7 through a pipeline for second-stage separation, and is conveyed to the shale gas output end 2 through a pipeline after being separated in the second filtering separator 7. And the impurity separated through the second filtering separator 7 is collected by the second impurity storage cylinder 6, and the second impurity storage cylinder 6 is positioned below the second filtering separator 7, so that the impurity removing effect on the shale gas can be further improved under the action of gravity of the impurity.
When the moisture content in the shale gas is high, the cyclone separator 3 is used for first-stage separation, the separated shale gas enters the second filtering separator 7 through a pipeline, the separated shale gas can carry more moisture into the second filtering separator 7 to be separated in a second stage, impurities such as sand grains and moisture after the second-stage separation are collected by the second impurity storage cylinder 6, and compared with a mode that the first filtering separator 5 is used for second-stage separation, the filling rate of the first impurity storage cylinder 4 can be reduced through the second filtering separator 7.
As shown in fig. 1, in the present embodiment 1, a first gate valve 8 is provided on a pipeline between the first impurity storage tank 4 and the N-th cyclone 3, and a second gate valve 9 is provided on a pipeline between the N-th cyclone 3 and the second first filtering separator 7. Therefore, when the first filtering separator 5 is required to stop, only the second filtering separator 7 is subjected to second-stage separation in a mode of closing the first gate valve 8 and opening the second gate valve 9; when the second filtering separator 7 is required to stop, only the first filtering separator 5 is allowed to perform the second-stage separation in a mode of closing the second gate valve 9 and opening the first gate valve 8. Furthermore, the shale gas can be continuously worked through the embodiment 1.
Further, the embodiment 1 further comprises a fluid inlet end 10 and a impurity collecting device 11, a third gate valve 12 is arranged on a pipeline between the first impurity storage cylinder 4 and the first filtering separator 5, a fourth gate valve 13 is arranged on a pipeline between the second impurity storage cylinder 6 and the second N-th filtering separator 7, as shown in fig. 1, the first impurity storage cylinder 4 and the second impurity storage cylinder 6 can be communicated through a pipeline, and a sixth gate valve 15 is arranged on a pipeline between the first impurity storage cylinder 4 and the second impurity storage cylinder 6; in the view shown in fig. 1, the fluid inlet end 10 is positioned at one side of the impurity storage cylinder I4, and the impurity storage cylinder I4 is communicated with the fluid inlet end 10 through a pipeline; the impurity collecting device 11 is arranged on the other one of the impurity storage cylinder I4 and the impurity storage cylinder II 6 and is communicated with the impurity collecting device 11 through a pipeline, and a gate valve V14 is arranged on the pipeline connected with the impurity collecting device 11.
Furthermore, when the impurities in the first impurity storage cylinder 4 and/or the second impurity storage cylinder 6 need to be cleaned, the first gate valve 8, the third gate valve 12 and the fourth gate valve 13 can be closed, the fifth gate valve 14 and the sixth gate valve 15 can be opened, then fluid is injected into the fluid inlet end 10, the fluid enters the first impurity storage cylinder 4 and/or the second impurity storage cylinder 6, the impurities in the first impurity storage cylinder 4 and/or the second impurity storage cylinder 6 are cleaned, and the cleaned impurities are finally collected by the impurity collecting device 11. In particular, the fluid may be selected to be clear water. The impurity collecting device 11 may be selected as a box structure.
In addition, in the embodiment 1, the first impurity storage cylinder 4 and the second impurity storage cylinder 6 may be respectively communicated with the fluid inlet end 10 through a pipeline, the first impurity storage cylinder 4 and the second impurity storage cylinder 6 are respectively communicated with the impurity collecting device 11 through a pipeline, and the pipeline connecting the first impurity storage cylinder 4 and the impurity collecting device 11 and the pipeline connecting the second impurity storage cylinder 6 and the impurity collecting device 11 are both provided with the fifth gate valve 14; therefore, the impurity of the first impurity storage cylinder 4 or the impurity of the second impurity storage cylinder 6 can be cleaned independently in the embodiment 1.
In the embodiment 1, fluid is input into the impurity storage cylinder I4 and/or the impurity storage cylinder II 6 through the fluid inlet end 10, which is beneficial to cleaning impurities in the impurity storage cylinder I4 and/or the impurity storage cylinder II 6; the impurity collecting device 11 is used for conveniently and uniformly collecting impurities in the impurity storage cylinder I4 and/or the impurity storage cylinder II 6 so as to prevent the impurities in the impurity storage cylinder I4 and/or the impurity storage cylinder II 6 from leaking to pollute the environment. Further, in order to ensure the sealing effect between the impurity storage cylinder ii 6 and the impurity collecting device 11 and further prevent the impurities in the impurity storage cylinder ii 4 and/or the impurity storage cylinder ii 6 from leaking out to pollute the environment, in this embodiment 1, a blowoff valve 16 is disposed on the pipeline connected to the impurity collecting device 11, and the blowoff valve 16 is located between the gate valve six 15 and the impurity collecting device 11. In the view shown in fig. 1, the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6, the second impurity storage cylinder 6 is communicated with the impurity collecting device 11 through a pipeline, and a drain valve 16 is arranged on the pipeline connecting the second impurity storage cylinder 6 and the impurity collecting device 11. Of course, if the first impurity storage barrel 4 and the second impurity storage barrel 6 are respectively connected with the impurity collecting device 11 through pipelines, the sewage valves 16 should be arranged on the pipelines connecting the first impurity storage barrel 4 and the impurity collecting device 11 and the pipelines connecting the second impurity storage barrel 6 and the impurity collecting device 11.
The embodiment 1 further comprises an emptying end 17 connected with the normal pressure environment, the first impurity storage cylinder 4 and the second impurity storage cylinder 6 are respectively communicated with the emptying end 17 through pipelines, and a first stop valve 18 is arranged on the pipeline between the first impurity storage cylinder 4 and the emptying end 17 and the pipeline between the second impurity storage cylinder 6 and the emptying end 17. In the embodiment 1, the emptying end 17 is arranged and the emptying end 17 is respectively communicated with the first impurity storage cylinder 4 and the second impurity storage cylinder 6, so that when impurities in the first impurity storage cylinder 4 and/or the second impurity storage cylinder 6 are cleaned, the pressure in the first impurity storage cylinder 4 and/or the second impurity storage cylinder 6 can be the same as the normal pressure by opening the first stop valve 18, and further, the cleaning of the impurities in the first impurity storage cylinder 4 and/or the second impurity storage cylinder 6 is facilitated.
As shown in fig. 1, in the embodiment 1, the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6 through the balance pipeline 22, and the balance pipeline 22 is provided with the second stop valve 19. And the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6, and a second stop valve 19 is arranged on a balance pipeline 22 between the first impurity storage cylinder 4 and the second impurity storage cylinder 6, so that the pressure in the first impurity storage cylinder 4 can be the same as the pressure in the second impurity storage cylinder 6 by opening the second stop valve 19. Therefore, before the shale gas is subjected to impurity removal, the pressure inside the first 4 impurity storage barrels and the pressure inside the second 6 impurity storage barrels can be balanced by opening the second 19 stop valves, so that the pressure environment for impurity removal of the shale gas in the first 5 filter separator is the same as the pressure environment for impurity removal of the shale gas in the second 7 filter separator, the impurity removal effect of the shale gas in the embodiment 1 can be guaranteed, and the safe operation of the embodiment 1 can be guaranteed.
Specifically, in the view shown in fig. 1, the number of the cyclone separator 3, the number of the first filtering separator 5 and the number of the second filtering separator 7 are all one, a first gate valve 8 is arranged on a pipeline between the cyclone separator 3 and the first impurity storage cylinder 4, a third gate valve 12 is arranged on a pipeline between the first filtering separator 5 and the first impurity storage cylinder 4, the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6 through a pipeline, a sixth gate valve 15 is arranged on a pipeline between the first impurity storage cylinder 4 and the second impurity storage cylinder 6, a fourth gate valve 13 is arranged on a pipeline between the second impurity storage cylinder 6 and the second filtering separator 7, a fifth gate valve 14 is arranged between the second impurity storage cylinder 6 and the impurity collecting device 11, a balance pipeline 22 is further arranged between the first impurity storage cylinder 4 and the second impurity storage cylinder 6, the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6 through the balance pipeline 22, and a second stop valve 19 is arranged on the balance pipeline 22. In the view shown in fig. 1, two second stop valves 19 are provided and are respectively located close to the first trash can 4 and the second trash can 6. When the internal pressure of the first miscellaneous storage cylinder 4 and the internal pressure of the second miscellaneous storage cylinder 6 are balanced, the first gate valve 8, the second gate valve 9, the third gate valve 12, the fourth gate valve 13, the fifth gate valve 14, the first stop valve 18 and the blowoff valve 16 are closed, the second stop valve 19 and the sixth gate valve 15 are opened, the first miscellaneous storage cylinder 4 is communicated with the second miscellaneous storage cylinder 6, and the internal pressure of the first miscellaneous storage cylinder 4 and the internal pressure of the second miscellaneous storage cylinder 6 are balanced.
As shown in fig. 1, in the present embodiment 1, a differential pressure gauge 20 is provided on each first filtering separator 5 and each second filtering separator 7; pressure gauges 21 are arranged on the first impurity storage cylinder 4 and the second impurity storage cylinder 6. The first filtering separator 5 and the second filtering separator 7 can be detected by the differential pressure gauge 20, and whether the blockage occurs or not can be detected; the pressure inside the first impurity storage cylinder 4 and the pressure inside the second impurity storage cylinder 6 can be detected by the pressure gauge 21. Further, it is convenient for the operator to monitor the condition of the present embodiment 1 at the time of operation. Furthermore, a pressure gauge 21 can be arranged on a connecting pipeline between the impurity storage cylinder I4 and the fluid inlet end 10 and/or a connecting pipeline between the impurity storage cylinder II 6 and the fluid inlet end 10, so that the pressure state on the connecting pipeline between the impurity storage cylinder I4 and the fluid inlet end 10 and/or the pressure state on the connecting pipeline between the impurity storage cylinder II 6 and the fluid inlet end 10 can be detected conveniently.
Example 2
specifically, the impurity removal system for shale gas wells applied in example 2 may be set in the following manner:
as shown in fig. 1, the impurity removing system for the shale gas well comprises a cyclone separator 3, a first filtering separator 5, a second filtering separator 7, an impurity collecting device 11, a first impurity storage barrel 4, a second impurity storage barrel 6, an air inlet end 1, an output end 2, a fluid inlet end 10 and an air outlet end 17; the cyclone separator 3, the first filtering separator 5 and the second filtering separator 7 are all one, the inlet end of the cyclone separator 3 is connected with the air inlet end 1 through a pipeline, and the outlet end of the cyclone separator 3 is connected with the inlet end of the first impurity storage barrel 4 through a pipeline; the outlet end of the first impurity storage cylinder 4 is connected with the first filtering separator 5 through a pipeline, the fluid inlet end 10 is positioned at one side of the first impurity storage cylinder 4, and the fluid inlet end 10 is connected with the first impurity storage cylinder 4 through a pipeline; the top of the cyclone separator 3 is connected with the inlet end of a second filtering separator 7 through a pipeline, and the outlet end of the second filtering separator 7 is connected with the inlet end of a second impurity storage cylinder 6 through a pipeline; the impurity collecting device 11 is positioned at one side of the second impurity storage cylinder 6, the impurity collecting device 11 is connected with the second impurity storage cylinder 6 through a pipeline, and a gate valve five 14 is arranged on the pipeline between the impurity collecting device 11 and the second impurity storage cylinder 6; the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6 through a pipeline, and a gate valve six 15 is arranged on the pipeline between the first impurity storage cylinder 4 and the second impurity storage cylinder 6; the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6 through a balance pipeline 22, and a second stop valve 19 is arranged on the balance pipeline 22; the outlet end of the first filtering separator 5 and the outlet end of the second filtering separator 7 are both connected with the output end 2 through pipelines; the first impurity storage barrel 4 and the second impurity storage barrel 6 are both connected with the emptying end 17 through pipelines, and a first stop valve 18 is arranged on the pipeline between the first impurity storage barrel 4 and the emptying end 17 and the pipeline between the second impurity storage barrel 6 and the emptying end 17; a first gate valve 8 is arranged on a pipeline between the cyclone separator 3 and the first impurity storage barrel 4, a second gate valve 9 is arranged on a pipeline between the cyclone separator 3 and the second filter separator 7, a third gate valve 12 is arranged on a pipeline between the first impurity storage barrel 4 and the first filter separator 5, a fourth gate valve 13 is arranged on a pipeline between the second impurity storage barrel 6 and the second filter separator 7, and a blow-down valve 16 is arranged between the impurity collecting device 11 and the fifth gate valve 14.
The impurity removal process included in this example 2 includes the following steps,
the pressure in the first impurity storage cylinder 4 and the pressure in the second impurity storage cylinder 6 are adjusted to be the same;
specifically, the first gate valve 8, the second gate valve 9, the third gate valve 12, the fourth gate valve 13, the fifth gate valve 14, the first stop valve 18 and the blowoff valve 16 are closed, and the second stop valve 19 and the sixth gate valve 15 are opened, so that the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6, and the pressure in the first impurity storage cylinder 4 and the pressure in the second impurity storage cylinder 6 can be balanced; when the pressure in the first impurity storage cylinder 4 and the pressure in the second impurity storage cylinder 6 are the same as the working pressure, the first gate valve 8, the second gate valve 9, the third gate valve 12 and the fourth gate valve 13 are opened, and the sixth gate valve 15 and the second stop valve 19 are closed.
Then the shale gas is input into a cyclone separator 3 from the gas inlet end 1 for separation;
performing first-stage separation on the shale gas in the cyclone separator 3, and then inputting impurities and the shale gas subjected to the first-stage separation into a first filtering separator 5 and/or inputting the impurities and the shale gas into a second filtering separator 7 for second-stage separation;
specifically, the impurities and the shale gas after the first-stage separation can be input into the impurity storage cylinder I4 by closing the gate valve II 9, and then input into the filtering separator I5 for second-stage separation; or the first gate valve 8 is closed, the impurities and the shale gas after the first-stage separation are input into a second filtering separator 7 for second-stage separation, and the impurities generated after the second-stage separation are collected by a second impurity storage cylinder 6; or simultaneously opening the first gate valve 8 and the second gate valve 9 to enable the first filtering separator 5 and the second filtering separator 7 to simultaneously perform second-stage separation on the impurities and the shale gas after the first-stage separation.
Then outputting the shale gas subjected to the second-stage separation from an output end 2 and completing collection;
the process of cleaning the impurities comprises the following steps,
closing the first gate valve 8, the second gate valve 9, the third gate valve 12, the fourth gate valve 13, the fifth gate valve 14, the sixth gate valve 15, the drain valve 16 and the second stop valve 19, and opening the first stop valve 18 to enable the pressure inside the first impurity storage cylinder 4 and the pressure inside the second impurity storage cylinder 7 to be the same as the normal pressure; and then closing the first stop valve 18, opening the gate valve six 15, the gate valve five 14 and the drain valve 16, injecting fluid into the fluid inlet end 10, enabling the fluid to enter the first impurity storage cylinder 4 and the second impurity storage cylinder 6, cleaning impurities in the first impurity storage cylinder 4 and impurities in the second impurity storage cylinder 6, and collecting the impurities through the impurity collecting device 11.
In addition, when the first impurity storage cylinder 4 is respectively communicated with the fluid inlet end 10 and the impurity collecting device 11 through a pipeline, the second impurity storage cylinder 6 is respectively communicated with the fluid inlet end 10 and the impurity collecting device 11 through a pipeline, and the first impurity storage cylinder 4 is not communicated with the second impurity storage cylinder 6, the process of cleaning impurities in the first impurity storage cylinder 4 or cleaning impurities in the second impurity storage cylinder 6 is as follows:
specifically, as shown in fig. 2, the impurity removing system for the shale gas well comprises a cyclone separator 3, a first filtering separator 5, a second filtering separator 7, an impurity collecting device 11, a first impurity storage cylinder 4, a second impurity storage cylinder 6, an air inlet end 1, an output end 2, a fluid inlet end 10 and an air outlet end 17; an inlet of the cyclone separator 3 is connected with the air inlet end 1 through a pipeline, and an outlet end of the cyclone separator 3 is connected with an inlet end of the impurity storage cylinder I4 through a pipeline; the outlet end of the first impurity storage cylinder 4 is connected with the first filtering separator 5 through a pipeline, the number of the fluid inlet ends 10 is two, one of the fluid inlet ends 10 is connected with the first impurity storage cylinder 4 through a pipeline, the number of the impurity collecting devices 11 is two, one of the impurity collecting devices 11 is connected with the first impurity storage cylinder 4 through a pipeline, and a gate valve five 14 is arranged on the pipeline between the impurity collecting device 11 and the first impurity storage cylinder 4; the top of the cyclone separator 3 is connected with the inlet end of a second filtering separator 7 through a pipeline, the outlet end of the second filtering separator 7 is connected with the inlet end of a second impurity storage cylinder 6 through a pipeline, the other fluid inlet end 10 is connected with the second impurity storage cylinder 6 through a pipeline, the other impurity collecting device 11 is connected with the second impurity storage cylinder 6 through a pipeline, and a gate valve fifth 14 is arranged on the pipeline between the impurity collecting device 11 and the second impurity storage cylinder 6; the first impurity storage cylinder 4 is communicated with the second impurity storage cylinder 6 through a balance pipeline 22, and a second stop valve 19 is arranged on the balance pipeline 22; the outlet end of the first filtering separator 5 and the outlet end of the second filtering separator 7 are both connected with the output end 2 through pipelines; the first impurity storage barrel 4 and the second impurity storage barrel 6 are both connected with the emptying end 17 through pipelines, and a first stop valve 18 is arranged on the pipeline between the first impurity storage barrel 4 and the emptying end 17 and the pipeline between the second impurity storage barrel 6 and the emptying end 17; a first gate valve 8 is arranged on a pipeline between the cyclone separator 3 and the first impurity storage barrel 4, a second gate valve 9 is arranged on a pipeline between the cyclone separator 3 and the second filter separator 7, a third gate valve 12 is arranged on a pipeline between the first impurity storage barrel 4 and the first filter separator 5, a fourth gate valve 13 is arranged on a pipeline between the second impurity storage barrel 6 and the second filter separator 7, and a blow-down valve 16 is arranged on a pipeline between the impurity collecting device 11 and the fifth gate valve 14.
When impurities in the impurity storage cylinder I4 are cleaned:
closing the first gate valve 8, the third gate valve 12, the fifth gate valve 14, the blowoff valve 16 and the second stop valve 19, and opening the first stop valve 18 to enable the pressure inside the first impurity storage cylinder 4 to be the same as the normal pressure; and then closing the first stop valve 18, opening the gate valve five 14 and the drain valve 16, injecting fluid into the fluid inlet end 10, enabling the fluid to enter the first impurity storage cylinder 4, cleaning impurities in the first impurity storage cylinder 4, and collecting the impurities through the impurity collecting device 11.
When impurities in the second impurity storage cylinder 6 are cleaned:
closing the second gate valve 9, the fourth gate valve 13, the fifth gate valve 14, the blowoff valve 16 and the second stop valve 19, and opening the first stop valve 18 to enable the pressure inside the second impurity storage cylinder 6 to be the same as the normal pressure; and then closing the first stop valve 18, opening the gate valve five 14 and the drain valve 16, injecting fluid into the fluid inlet end 10, enabling the fluid to enter the second impurity storage cylinder 6, cleaning impurities in the second impurity storage cylinder 6, and collecting the impurities through the impurity collecting device 11.
When the shale gas is subjected to impurity removal, the pressure inside the impurity storage cylinder I4 and the pressure inside the impurity storage cylinder II 6 are balanced, so that the pressure environment for removing impurities of the shale gas in the filtering separator I5 is the same as the pressure environment for removing impurities of the shale gas in the filtering separator II, the impurity removal effect of the impurity removal system on the shale gas can be ensured, and the safe operation of the impurity removal system can be ensured; then, the shale gas is subjected to two-stage multiple impurity removal through the cyclone separator 3 and the filtering separator respectively, so that impurities in the shale gas can be effectively removed; and finally, collecting the shale gas subjected to impurity removal. When impurities are cleaned, the pipeline for communicating the impurity storage cylinder I4 and/or the impurity storage cylinder II 6 with external equipment is blocked, and then when the impurities are cleaned, the impurities in the impurity storage cylinder I4 and/or the impurity storage cylinder II 6 cannot enter the equipment; then, the pressure inside the first impurity storage cylinder 4 and/or the pressure inside the second impurity storage cylinder 6 are/is the same as the normal pressure, so that the cleaning of impurities in the first impurity storage cylinder 4 and/or the second impurity storage cylinder 6 is facilitated; and finally, enabling the fluid to enter the impurity storage cylinder I4 and/or the impurity storage cylinder II 6 to clean impurities.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
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| US6805806B2 (en) * | 2001-06-12 | 2004-10-19 | Hydrotreat, Inc. | Method and apparatus for treatment of wastewater employing membrane bioreactors |
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