Self-dredging storage tank

Abstract

The utility model relates to a self-desilting storage tank, which comprises a storage tank body with an outlet at the bottom and an inlet at the top; the backwashing part is connected with the outlet and the inlet of the storage tank body and is used for cleaning the interior of the storage tank body; and the control assembly is connected with the backwashing part and is used for controlling the backwashing part to be opened and closed. According to the self-dredging storage tank provided by the embodiment of the utility model, the back washing part can be controlled to be opened and closed through the control assembly, and the storage tank body is cleaned from the top and the bottom at regular time according to requirements, so that the sedimentation of impurities in the storage tank body is avoided, and the cleaning frequency of a filter element in an outlet pump of the self-dredging storage tank can be effectively reduced; and meanwhile, the long-period stable operation of the storage tank can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas well exploitation technical field, in particular to a kind of self-dredging storage tank. BACKGROUND

[0002] In the exploitation process of gas well, part of formation water is carried into ground process by natural gas, after being separated by separator, natural gas enters subsequent delivery process, and liquid phase water is stored in produced water buffer tank. Part of silt, particulate impurities and the like are entrained in formation water, which can easily block the inlet filter element of the produced water buffer tank drainage pump when the produced water is discharged.

[0003] The related technology needs to set up a special cleaning pipeline to clean the storage tank from the top of the storage tank. The filter element of the drainage pump needs to be cleaned frequently by the on-site staff, which increases the workload and is not conducive to prolonging the service life of the pump. At the same time, the dirt at the bottom of the produced water buffer tank accumulates more and more, which can only be treated collectively during shutdown maintenance, which is not conducive to safety management. The produced water buffer tank accumulates in many cases. SUMMARY

[0004] The utility model provides a kind of self-dredging storage tank, at least can solve the technical problem that the filter element of the drainage pump needs to be cleaned frequently by the on-site staff, which increases the workload and is not conducive to prolonging the service life of the pump.

[0005] The utility model provides the scheme as follows:

[0006] A self-dredging storage tank, the self-dredging storage tank comprises:

[0007] The storage tank body has an outlet at the bottom and an inlet at the top.

[0008] The backflushing part is connected to the outlet and inlet of the storage tank body and is used to clean the inside of the storage tank body.

[0009] The control assembly is connected to the backflushing part and is used to control the opening and closing of the backflushing part.

[0010] In one embodiment, the backflushing part comprises a bottom cleaning assembly and a top cleaning assembly.

[0011] The bottom cleaning assembly is connected to the outlet of the storage tank body to clean the storage tank body from the bottom.

[0012] The top cleaning assembly is connected to the inlet of the storage tank body to clean the storage tank body from the top.

[0013] In one embodiment, the self-dredging storage tank further comprises a blowdown pipeline connected to the outlet at the bottom of the storage tank body.

[0014] The bottom cleaning assembly comprises a clean water pump and a bottom cleaning pipeline connected with each other;

[0015] The bottom cleaning pipeline is connected with a blowdown pipeline at the bottom of the storage tank body;

[0016] The clean water pump is used to be connected with an external water supply device.

[0017] In one embodiment, the bottom cleaning assembly further comprises a temperature sensor arranged on the bottom cleaning pipeline.

[0018] In one embodiment, the top cleaning assembly comprises a top cleaning pipeline and a top cleaning member;

[0019] One end of the top cleaning pipeline is connected with the clean water pump, and the other end is connected with an inlet at the top of the storage tank body;

[0020] The top cleaning member is arranged in the storage tank body and connected with the top cleaning pipeline.

[0021] In one embodiment, the top cleaning member comprises a support, a first spray pipe and a second spray pipe;

[0022] The support is connected with the inner wall of the storage tank body;

[0023] The first spray pipe and the second spray pipe are fixed on the support, and the first spray pipe is arranged in a first direction and the second spray pipe is arranged in a second direction, the first direction being perpendicular to the second direction.

[0024] In one embodiment, water outlets are arranged on the first spray pipe and the second spray pipe at intervals.

[0025] In one embodiment, the control assembly comprises an inlet valve and an outlet valve;

[0026] The inlet valve is arranged between the backwashing part and the inlet at the top of the storage tank body;

[0027] The outlet valve is arranged between the backwashing part and the outlet at the bottom of the storage tank body.

[0028] In one embodiment, the self-desilting storage tank further comprises a liquid level sensor arranged in the storage tank body, the liquid level sensor being used to measure the liquid level in the storage tank body.

[0029] In one embodiment, the inlet at the top of the storage tank body comprises a nitrogen inlet, a sewage inlet and a flushing port;

[0030] The nitrogen inlet is used for connecting with a nitrogen device, and is used for providing nitrogen in the storage tank body;

[0031] The sewage inlet is used for connecting with a sewage source;

[0032] The flushing port is connected with the backwashing part.

[0033] Compared with the prior art, the self-dredging storage tank has the advantages that,

[0034] The self-dredging storage tank can control the opening and closing of the backwashing part through the control assembly, and the storage tank body can be cleaned from the top and the bottom at a regular time according to needs, so that the impurities in the storage tank body can be avoided to settle, the cleaning frequency of the filter element in the outlet pump of the self-dredging storage tank can be effectively reduced, the workload of the staff can be reduced, and the long-period stable operation of the storage tank can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0035] The utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0036] Figure 1 It is the whole structure diagram of the self-dredging storage tank of the utility model.

[0037] Figure 2 It is the side view of the self-dredging storage tank of the utility model.

[0038] Reference signs:

[0039] 1-storage tank body, 101-nitrogen inlet, 102-sewage inlet, 2-backwashing part, 21-clean water pump, 22-bottom cleaning pipeline, 23-bracket, 24-first spray pipe, 25-second spray pipe, 3-control assembly, 31-inlet valve, 32-outlet valve, 4-drainage pipeline. DETAILED DESCRIPTION

[0040] The utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0041] Please see Figure 1 and Figure 2 The embodiment of the application provides a self-dredging storage tank, which comprises a storage tank body 1, a backwashing part 2 and a control assembly 3, wherein the storage tank body 1 is provided with an outlet at the bottom and an inlet at the top; the backwashing part 2 is connected with the outlet and the inlet of the storage tank body 1 and is used for cleaning the inside of the storage tank body 1; and the control assembly 3 is connected with the backwashing part 2 and is used for controlling the opening and closing of the backwashing part 2.

[0042] The self-dredging storage tank provided by the embodiment of the utility model can control the opening and closing of the backwashing part 2 through the control assembly 3, can clean the storage tank body 1 from the top and the bottom at regular time according to the requirement, avoids the impurity settlement in the storage tank body 1, reduces the corrosion of the storage tank body 1, can effectively reduce the cleaning frequency of the filter element in the outlet pump of the self-dredging storage tank, reduces the work load of the staff, is favorable to the long-period stable operation of the storage tank, can effectively improve the service life of each device in the self-dredging storage tank, and protects the material quality of each device in the self-dredging storage tank.

[0043] The shape of the storage tank body 1 provided by the embodiment of the application can be a cylindrical storage tank, a rectangular storage tank or a semicircular storage tank. Figure 1 The storage tank body 1 comprises a rectangular storage tank and semicircular ports arranged at both ends of the rectangular storage tank. The shape of the storage tank body 1 can be set according to the requirement of the user, and the shape of the storage tank body 1 is not limited in the embodiment of the application.

[0044] The type of the storage tank body 1 provided by the embodiment of the application can comprise a gas field produced water storage tank, a pressure inclined plate tank of a purification plant, a sealed sludge tank and an underground waste liquid tank. The type of the storage tank body 1 is not limited in the embodiment of the application. The self-dredging storage tank provided by the application can be applied to the gas field ground process flow, and can optimize the existing gathering and purification related equipment.

[0045] In an optional embodiment, the backwashing part 2 comprises a bottom cleaning assembly and a top cleaning assembly; the bottom cleaning assembly is connected with the outlet of the storage tank body 1 and is used for cleaning the storage tank body 1 from the bottom; and the top cleaning assembly is connected with the inlet of the storage tank body 1 and is used for cleaning the storage tank body 1 from the top.

[0046] The bottom cleaning assembly can clean the storage tank body 1 from the bottom, and the top cleaning assembly can clean the storage tank body 1 from the top, so that the inside of the storage tank body 1 can be cleaned from the top and the bottom at the same time according to the requirement, or the storage tank body 1 can be cleaned from the top or the bottom according to the requirement, thereby improving the applicability of the self-dredging storage tank, improving the cleaning efficiency when the storage tank body 1 is cleaned from the top and the bottom at the same time, and saving the operation time.

[0047] Further, the opening and closing of the bottom cleaning assembly can be controlled through the control assembly 3, and the opening and closing of the top cleaning assembly can be controlled through the control assembly 3.

[0048] In an optional embodiment, the self-dredging storage tank further comprises a blowdown pipeline 4 connected with the outlet at the bottom of the storage tank body 1; the bottom cleaning assembly comprises a clean water pump 21 and a bottom cleaning pipeline 22 connected with each other; the bottom cleaning pipeline 22 is connected with the blowdown pipeline 4 at the bottom of the storage tank body 1; and the clean water pump 21 is used for being connected with an external water supply device.

[0049] The bottom of the storage tank body 1 is provided with an outlet, and the sewage pipeline 4 is connected with the outlet, so that sewage can be discharged outside. However, in the case of long-term sewage, the sewage pipeline 4 will be blocked. Therefore, the bottom cleaning pipeline 22 is connected with the sewage pipeline 4 at the bottom of the storage tank body 1, and the clean water pump 21 is used to spray clean water into the storage tank body 1 through the sewage pipeline 4. On the one hand, the sewage pipeline 4 can be cleaned. On the other hand, the cleaning of the storage tank body 1 is realized through the sewage pipeline 4, the cost of pipeline setting is reduced, and the cleaning efficiency is improved.

[0050] In an optional embodiment, the bottom cleaning assembly further comprises a temperature sensor, which is arranged on the bottom cleaning pipeline 22.

[0051] It can be understood that the liquid in the storage tank body 1 may be oily sewage, so the temperature of the cleaning water needs to be adjusted when the storage tank body 1 is cleaned. Therefore, the temperature of the cleaning water can be controlled by arranging the temperature sensor, so as to improve the cleaning quality and efficiency.

[0052] In an optional embodiment, the top cleaning assembly comprises a top cleaning pipeline and a top cleaning piece. One end of the top cleaning pipeline is connected with the clean water pump 21, and the other end is connected with an inlet at the top of the storage tank body 1. The top cleaning piece is arranged in the storage tank body 1 and connected with the top cleaning pipeline.

[0053] The top cleaning pipeline is connected with the clean water pump 21. When the storage tank body 1 needs to be cleaned from the top, the pipeline between the clean water pump 21 and the top cleaning pipeline is opened, the clean water enters the top cleaning piece through the top cleaning pipeline, and the storage tank body 1 is cleaned by the top cleaning piece.

[0054] In an optional embodiment, the top cleaning piece comprises a bracket 23, a first spray pipe 24 and a second spray pipe 25. The bracket 23 is connected with the inner wall of the storage tank body 1. The first spray pipe 24 and the second spray pipe 25 are fixed on the bracket 23, the first spray pipe 24 is arranged in a first direction, the second spray pipe 25 is arranged in a second direction, and the first direction is perpendicular to the second direction.

[0055] The bracket 23 can be an arc-shaped bracket, which is arranged in the storage tank body 1 and connected with the inner wall of the storage tank body 1. The first spray pipe 24 and the second spray pipe 25 are fixed on the bracket 23.

[0056] In an optional embodiment, the first spray pipe 24 and the second spray pipe 25 can be plastic hoses. The plastic hoses have low plasticity, can be adjusted in a small range according to the size of water spraying, and can clean the corners in the storage tank body 1. Figure 1The first spray pipe 24 and the second spray pipe 25 can be arranged along the inner wall of the tank body 1, and the curvature of the first spray pipe 24 and the second spray pipe 25 can be similar to the curvature of the inner wall of the tank body 1.

[0057] In an optional embodiment, the first spray pipe 24 and the second spray pipe 25 are provided with water outlet holes at a preset distance.

[0058] Exemplarily, the preset distance can be 20 cm, and the diameter of the water outlet hole can be determined according to the diameter of the first spray pipe 24 and the second spray pipe 25. Exemplarily, the diameter of the water outlet hole can be 1 / 3-1 / 4 of the diameter of the first spray pipe 24 and the second spray pipe 25.

[0059] In an optional embodiment, the control assembly 3 includes an inlet valve 31 and an outlet valve 32; the inlet valve 31 is arranged between the backwashing part 2 and the inlet at the top of the tank body 1; and the outlet valve 32 is arranged between the backwashing part 2 and the outlet at the bottom of the tank body 1.

[0060] Further, the inlet valve 31 is arranged on the top cleaning pipeline between the backwashing part 2 and the inlet at the top of the tank body 1, and the outlet valve 32 is arranged on the bottom cleaning pipeline 22 between the backwashing part 2 and the outlet at the bottom of the tank body 1.

[0061] In an optional embodiment, the self-desilting tank further includes a liquid level sensor, which is arranged in the tank body 1 and used to measure the liquid level in the tank body 1.

[0062] According to the embodiment, the liquid level sensor arranged in the tank body 1 can be used to obtain the content of the stored sewage or cleaning water used for cleaning in the tank body 1 in real time.

[0063] In an optional embodiment, the inlet at the top of the tank body 1 includes a nitrogen inlet 101, a sewage inlet 102 and a flushing port; the nitrogen inlet 101 is used to be connected with a nitrogen device to provide nitrogen for the tank body 1; the sewage inlet 102 is used to be connected with a sewage source; and the flushing port is connected with the backwashing part 2.

[0064] Further, the flushing port is connected with the top cleaning pipeline of the backwashing part 2.

[0065] Further, in the embodiment, a valve is arranged between the top cleaning pipeline and the cleaning pump and between the cleaning pump and the blowdown pipeline.

[0066] As an example, taking the produced water storage tank as an example, the conventional process of the produced water storage tank is that the gas field water carried in the natural gas enters the produced water storage tank, the liquid level of the produced water storage tank is usually kept at 40%-60%, when the liquid level is higher than 60%, the tank is connected to the downstream process to drain the liquid, and the downstream is generally pulled by a tank car or a sludge tank is provided for buffering.

[0067] The present application can set a fixed cleaning time according to the cleanliness of the produced water (water entering the tank body 1), when the tank body 1 needs to be self-cleaning (i.e. without manual opening of the pipeline or valve of the tank body 1 for cleaning, realizing automatic cleaning), first drain the sewage in the sewage pipeline 4 to 5%-10%, close the pipeline valve (valve on the sewage pipeline 4) of the sewage to the downstream, open the valve of the clean water to the bottom of the tank body 1, open the clean water pump 21, the bottom cleaning pipeline 22, the bottom cleaning pipeline 22 is communicated with the sewage pipeline 4, and the clean water is used to dilute the dirt in the sewage pipeline 4. When the liquid level in the tank body 1 rises by 10%, open the top cleaning pipeline of the tank body 1, close the sewage pipeline 4, and transport clean water to the top of the tank body 1, spray the inner wall of the tank body 1 at the water outlet holes of the first spray pipe 24 and the second spray pipe 25, from top to bottom, and the spraying area covers the entire inner wall of the tank body 1. When the liquid level in the tank body 1 rises by 10%, close the clean water pump 21.

[0068] Open the sewage pipeline 4 to prepare for liquid discharge, drain the sewage to 5%-10%, and use nitrogen to further clean the inner wall of the tank body 1. Through 2-3 times of cleaning, the self-cleaning of the tank body 1 can be completed.

[0069] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present application, and equivalent substitutions can be made to the components thereof. In particular, as long as there is no structural conflict, each of the technical features mentioned in each of the embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A self-dredging storage tank characterized by, The self-dredging tank comprises: a tank body having an outlet at the bottom and an inlet at the top; a backwashing part connected with the outlet and the inlet of the tank body for cleaning the inside of the tank body; a control assembly connected with the backwashing part for controlling the opening and closing of the backwashing part.

2. The self-dredging storage tank of claim 1, wherein, The backwashing part comprises a bottom cleaning assembly and a top cleaning assembly; the bottom cleaning assembly is connected with the outlet of the tank body for cleaning the tank body from the bottom; the top cleaning assembly is connected with the inlet of the tank body for cleaning the tank body from the top.

3. The self-dredging storage tank of claim 2, wherein, The self-dredging tank further comprises a blowdown pipe connected with the outlet at the bottom of the tank body; the bottom cleaning assembly comprises a clean water pump and a bottom cleaning pipe connected with each other; the bottom cleaning pipe is connected with the blowdown pipe at the bottom of the tank body; the clean water pump is used to be connected with an external water supply device.

4. The self-dredging storage tank of claim 3, wherein, The bottom cleaning assembly further comprises a temperature sensor arranged on the bottom cleaning pipe.

5. The self-dredging storage tank of claim 3, wherein, The top cleaning assembly comprises a top cleaning pipe and a top cleaning member; one end of the top cleaning pipe is connected with the clean water pump and the other end is connected with the inlet at the top of the tank body; the top cleaning member is arranged in the tank body and connected with the top cleaning pipe.

6. The self-dredging storage tank of claim 5, wherein, The top cleaning member comprises a support, a first spray pipe and a second spray pipe; the support is connected with the inner wall of the tank body; the first spray pipe and the second spray pipe are fixed on the support, and the first spray pipe is arranged in a first direction and the second spray pipe is arranged in a second direction, the first direction being perpendicular to the second direction.

7. The self-dredging storage tank of claim 6, wherein, water outlets are arranged on the first spray pipe and the second spray pipe at intervals with a preset distance.

8. The self-dredging storage tank of any one of claims 1 to 7, wherein, The control assembly comprises an inlet valve and an outlet valve; the inlet valve is arranged between the backwashing part and the inlet at the top of the tank body; the outlet valve is arranged between the backwashing part and the outlet at the bottom of the tank body.

9. The self-dredging storage tank according to any one of claims 1 to 7, characterized in that, The self-dredging tank further comprises a liquid level sensor arranged in the tank body, which is used to measure the liquid level in the tank body.

10. The self-dredging storage tank of any one of claims 1 to 7, wherein, The inlet at the top of the tank body comprises a nitrogen inlet, a sewage inlet and a flushing port; the nitrogen inlet is used to be connected with a nitrogen device for providing nitrogen in the tank body; the sewage inlet is used to be connected with a sewage source; the flushing port is connected with the backwashing part.

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