Backwashing device for outlet water cooler of natural gas compressor

Abstract

The utility model belongs to the technical field of water coolers, and particularly relates to a backwashing device for an outlet water cooler of a natural gas compressor. Comprising a water cooler which is connected with a circulating water feeding pipeline and a circulating water return pipeline; outlets of the high-pressure production water pipeline and the cleaning liquid inlet pipeline are respectively connected between the circulating backwater stop valve and a tube pass outlet of the water cooler; inlets of the cleaning liquid outlet pipeline and the flushing water outlet pipeline are respectively connected between the circulating water feeding stop valve and a tube pass inlet of the water cooler; a pulse generator is arranged on the high-pressure production water pipeline, and a water quality detector is arranged on the flushing water drainage pipeline; an inlet of the cleaning liquid inlet pipeline and an outlet of the cleaning liquid outlet pipeline are respectively connected with the citric acid preparation tank. According to the device, the physical scouring effect of high-pressure production water and the chemical dissolving effect of citric acid cleaning liquid are combined, sludge, impurities and stubborn scale in the pipe bundle of the water cooler can be efficiently removed, and the cleaning effect of the water cooler is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water coolers, and particularly relates to an anti-flushing device for the outlet water cooler of a natural gas compressor. Background Art

[0002] In a natural gas compression system, as a key heat exchange device, the performance and efficiency of a water cooler directly affect the stability and operating cost of the entire compression system. However, during actual operation, various types of dirt are extremely likely to form on the surface and inside of the water cooler tube bundle, such as scale, particulate dirt, chemical reaction dirt, corrosion dirt, and biological dirt. The accumulation of these dirt not only seriously reduces the heat exchange efficiency of the water cooler, resulting in increased energy consumption, but also may cause equipment failures due to tube bundle blockage, thereby affecting production safety and continuity.

[0003] Specifically, scale is mainly formed by the decomposition and deposition of minerals in water (such as calcium bicarbonate, magnesium bicarbonate, etc.) on the tube bundle surface under high temperature or high concentration conditions, while particulate dirt originates from suspended solid particles in the fluid system. In addition, the formation of chemical reaction dirt, corrosion dirt, and biological dirt is related to various factors such as fluid composition, temperature, pressure, and environmental conditions. The presence of these dirt not only increases the thermal resistance and reduces the effective heat exchange area, but also may cause corrosion to the tube bundle material and shorten the service life of the equipment.

[0004] In response to the above problems, although traditional cleaning methods such as mechanical cleaning and disassembly and immersion cleaning can achieve certain effects, they have deficiencies such as complex operation, time-consuming and laborious, and easy to damage the equipment. Especially for the outlet water cooler of a large natural gas compressor, frequent disassembly and installation not only increase the maintenance cost, but also may affect the production progress. Therefore, it is particularly important to seek a cleaning method that is efficient, convenient, and does not damage the equipment.

[0005] As an effective on-line cleaning means, the reverse circulation cleaning technology loosens and removes the dirt attached to the pipe wall by changing the inlet and outlet directions of the circulation pipeline and using the scouring action of the fluid. However, traditional anti-flushing devices often have problems such as insufficient flexibility, poor cleaning effect, or complex operation in design. Therefore, it is particularly important to develop an anti-flushing device that can efficiently and conveniently remove the dirt in the water cooler tube bundle while ensuring the safe and stable operation of the equipment. Summary of the Utility Model

[0006] In view of the above deficiencies in the prior art, the purpose of the present utility model is to provide an anti-flushing device for the outlet water cooler of a natural gas compressor, which combines the physical scouring action of high-pressure production water and the chemical dissolution action of citric acid cleaning solution, can efficiently remove the sludge, impurities, and stubborn scale inside the water cooler tube bundle, and significantly improves the cleaning effect of the water cooler.

[0007] The utility model is realized by adopting the following technical solutions:

[0008] The described backwashing device for the outlet water cooler of a natural gas compressor includes a water cooler. The inlet of the tube side of the water cooler is connected to a circulating upper water pipeline, and the outlet of the tube side of the water cooler is connected to a circulating return water pipeline. A circulating upper water stop valve and a circulating return water stop valve are respectively arranged at the inlet of the circulating upper water pipeline and the outlet of the circulating return water pipeline; It also includes a high-pressure production water pipeline, a cleaning liquid inlet pipeline, a cleaning liquid drainage pipeline, and a flushing water drainage pipeline. The outlets of the high-pressure production water pipeline and the cleaning liquid inlet pipeline are respectively connected to the pipeline between the circulating return water stop valve and the tube side outlet of the water cooler, and the inlets of the cleaning liquid drainage pipeline and the flushing water drainage pipeline are respectively connected to the pipeline between the circulating upper water stop valve and the tube side inlet of the water cooler; A pulse generator is arranged on the high-pressure production water pipeline, and a water quality detector is arranged on the flushing water drainage pipeline; It also includes a citric acid preparation tank, and the inlet of the cleaning liquid inlet pipeline and the outlet of the cleaning liquid drainage pipeline are respectively connected to the citric acid preparation tank.

[0009] A production water branch pipe is connected to the high-pressure production water pipeline, and the outlet of the production water branch pipe is connected to the citric acid preparation tank.

[0010] It also includes a citric acid inlet pipeline, and the outlet of the citric acid inlet pipeline is connected to the citric acid preparation tank.

[0011] A citric acid flushing circulation pump is arranged on the cleaning liquid inlet pipeline.

[0012] A circulation pump inlet filter is arranged on the inlet pipeline of the citric acid flushing circulation pump.

[0013] The outlet of the flushing water drainage pipeline is connected to a trench.

[0014] A circulating cleaning liquid water cooler is arranged on the cleaning liquid drainage pipeline.

[0015] The working principle of the backwashing device for the outlet water cooler of the natural gas compressor described in the utility model is as follows:

[0016] Before backwashing, first close the circulating upper water stop valve and the circulating return water stop valve to cut off the normal circulating water flow. At the same time, ensure that the citric acid cleaning liquid has been prepared in proportion in the citric acid preparation tank for subsequent cleaning steps. The citric acid inlet pipeline can supplement citric acid to the preparation tank at any time to meet different cleaning requirements.

[0017] During backwashing, production water with a pressure of approximately 1.0 MPa is injected from the high-pressure production water pipeline into the pipeline between the circulating return water pipeline and the tube-side outlet of the water cooler. Under the action of pulses, the production water powerfully backwashes the inside of the water cooler tube bundle for approximately 10 minutes. The main purpose of this process is to remove dirt such as sediment and impurities deposited in the tube bundle, especially by taking advantage of the backwashing to effectively break up and wash away the directional deposits formed due to long-term low-flow circulating water. After the preliminary flushing is completed, the circulation is switched to the citric acid cleaning solution. The citric acid cleaning solution is pumped from the citric acid preparation tank into the pipeline between the circulating return water pipeline and the tube-side outlet of the water cooler through the citric acid flushing circulation pump on the cleaning solution inlet pipeline, and returns to the citric acid preparation tank from the cleaning solution drain pipeline after flowing through the water cooler. The citric acid cleaning solution circulates inside the tube bundle and uses its acidic properties to chemically react with the scale on the inner wall of the tube bundle to achieve the purpose of dissolving and removing the scale. This stage lasts for approximately 1 hour. During this period, the impurities in the cleaning solution are ensured not to enter the pump body of the citric acid flushing circulation pump through the inlet filter of the circulation pump, which may affect the operation of the pump; the circulating cleaning solution water cooler is used to cool the circulating citric acid cleaning solution to effectively prevent the temperature of the cleaning solution from continuously rising due to heat absorption during long-term circulation. At the same time, the water quality detector on the flushing water drain pipeline can monitor the drain water quality to ensure that the flushing effect meets the requirements. After the citric acid cleaning is completed, high-pressure production water is used again through the high-pressure production water pipeline for flushing to remove the remaining citric acid cleaning solution in the tube bundle and the products generated by its reaction with the scale. After the flushing is completed, all valves and pipelines related to backwashing are closed, and the circulating water stop valve and the circulating return water stop valve are reopened to restore the normal circulating water flow of the water cooler, and the flushing water is safely discharged through the trench.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] (1) The backwashing device for the outlet water cooler of the natural gas compressor described in the present utility model combines the physical scouring effect of high-pressure production water and the chemical dissolution effect of the citric acid cleaning solution, and can efficiently remove sediment, impurities and stubborn scale inside the water cooler tube bundle. Especially through the backwashing technology, it effectively breaks up and washes away the directional deposits formed due to long-term low-flow circulation, significantly improving the cleaning effect; at the same time, through the efficient cleaning method, the problems of reduced heat transfer efficiency and increased energy consumption caused by the accumulation of tube bundle dirt are reduced;

[0020] (2) The backwashing device for the outlet water cooler of the natural gas compressor described in the present utility model integrates intelligent components such as a pulse generator, a citric acid flushing circulation pump, a circulation pump inlet filter, and a water quality detector, realizing automatic control and real-time monitoring of the cleaning process. This not only reduces the burden of manual operation but also improves the accuracy and safety of the cleaning operation. At the same time, through the setting of the citric acid preparation tank and the liquid inlet pipeline, the device can adjust the concentration and dosage of the citric acid cleaning solution according to different cleaning requirements, improving the flexibility and adaptability of the cleaning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the backwashing device for the outlet water cooler of the natural gas compressor described in the present utility model;

[0022] In the figure: 1, water cooler; 2, circulating upper water pipeline; 3, circulating return water pipeline; 4, circulating upper water stop valve; 5, circulating return water stop valve; 6, high-pressure production water pipeline; 7, cleaning liquid inlet pipeline; 8, cleaning liquid discharge pipeline; 9, flushing water discharge pipeline; 10, pulse generator; 11, water quality detector; 12, citric acid preparation tank; 13, production water branch pipe; 14, citric acid inlet pipeline; 15, citric acid flushing circulation pump; 16, circulation pump inlet filter; 17, trench; 18, circulating cleaning liquid water cooler. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the purpose and technical solutions of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] Embodiment 1

[0025] As Figure 1 shown, the backwashing device for the outlet water cooler of the natural gas compressor includes a water cooler 1. The inlet of the tube side of the water cooler 1 is connected to a circulating upper water pipeline 2, and the outlet of the tube side of the water cooler 1 is connected to a circulating return water pipeline 3. A circulating upper water stop valve 4 and a circulating return water stop valve 5 are respectively provided at the inlet of the circulating upper water pipeline 2 and the outlet of the circulating return water pipeline 3. It also includes a high-pressure production water pipeline 6, a cleaning liquid inlet pipeline 7, a cleaning liquid discharge pipeline 8, and a flushing water discharge pipeline 9. The outlets of the high-pressure production water pipeline 6 and the cleaning liquid inlet pipeline 7 are respectively connected to the pipeline between the circulating return water stop valve 5 and the outlet of the tube side of the water cooler 1. The inlets of the cleaning liquid discharge pipeline 8 and the flushing water discharge pipeline 9 are respectively connected to the pipeline between the circulating upper water stop valve 4 and the inlet of the tube side of the water cooler 1. A pulse generator 10 is provided on the high-pressure production water pipeline 6, and a water quality detector 11 is provided on the flushing water discharge pipeline 9. It also includes a citric acid preparation tank 12. The inlet of the cleaning liquid inlet pipeline 7 and the outlet of the cleaning liquid discharge pipeline 8 are respectively connected to the citric acid preparation tank 12.

[0026] A production water branch pipe 13 is connected to the high-pressure production water pipeline 6 described above, and the outlet of the production water branch pipe 13 is connected to the citric acid preparation tank 12.

[0027] It also includes a citric acid inlet pipeline 14, and the outlet of the citric acid inlet pipeline 14 is connected to the citric acid preparation tank 12.

[0028] A citric acid flushing circulation pump 15 is provided on the cleaning liquid inlet pipeline 7 described above.

[0029] A circulation pump inlet filter 16 is provided on the inlet pipeline of the citric acid flushing circulation pump 15.

[0030] The outlet of the flushing water drainage pipeline 9 is connected to a trench 17.

[0031] A circulation cleaning liquid water cooler 18 is provided on the cleaning liquid drainage pipeline 8 described above.

[0032] During operation, the specific steps are as follows:

[0033] 1) Preparation stage:

[0034] Close the circulating water supply stop valve 4 and the circulating water return stop valve 5 to cut off the normal circulating water flow and prepare for the backwashing operation. Check whether the citric acid cleaning liquid in the citric acid preparation tank 12 has been prepared in proportion, ensure the smooth flow of the inlet process of the citric acid flushing circulation pump 15, and confirm the smoothness of the citric acid inlet pipeline 14 for replenishing citric acid at any time.

[0035] 2) Preliminary flushing with high-pressure production water:

[0036] Open the valve on the high-pressure production water pipeline 6, and let the production water with a pressure of about 1.0 MPa be injected into the pipeline between the outlet of the tube side of the circulating water return pipeline 3 and the water cooler 1 through the high-pressure production water pipeline 6. At the same time, start the pulse generator 10. Under the action of the pulse effect, the high-pressure production water strongly backwashes the inside of the tube bundle of the water cooler 1 for 10 minutes. Open all the valves of the flushing water drainage pipeline 9 to the trench, and the flushing water is discharged into the trench 17 through the flushing water drainage pipeline 9. After draining the pipeline, close the valves. During this process, the production water effectively disintegrates and washes away the dirt such as silt and impurities deposited in the tube bundle, especially using the advantage of backwashing to remove the directional deposits formed by the long-term low-flow circulating water.

[0037] 3) Circulation cleaning with citric acid cleaning liquid:

[0038] After the initial flushing is completed, close the valve on the high-pressure production water pipeline 6 and switch to the citric acid cleaning liquid circulation. Start the citric acid flushing circulation pump 15 on the cleaning liquid inlet pipeline 7, and pump the citric acid cleaning liquid in the citric acid preparation tank 12 into the pipeline between the circulating return water pipeline 3 and the water cooler 1 pipe outlet through the citric acid flushing circulation pump 15. The citric acid cleaning liquid circulates in the tube bundle, and uses its acidic properties to react chemically with scale to dissolve and remove scale on the inner wall of the tube bundle. This stage lasts for 1 hour, and the cleaned citric acid cleaning liquid returns to the citric acid preparation tank from the cleaning liquid discharge pipeline 8. During this period, the circulating pump inlet filter 16 ensures that impurities in the cleaning liquid will not enter the citric acid flushing circulation pump 15, protecting the pump body from damage. The circulating cleaning liquid water cooler 18 cools the circulating citric acid cleaning liquid, effectively preventing the cleaning liquid from absorbing heat during the long-term circulation process and causing the temperature to continue to rise. Meanwhile, during the citric acid cleaning process, the water quality detector 11 on the flushing water drainage pipeline 9 continuously monitors the drainage water quality to ensure that the citric acid cleaning effect reaches the predetermined standard.

[0039] 4) Re-rinse with production water:

[0040] After the citric acid cleaning is completed, repeat step 2) again to use high-pressure production water to flush through the high-pressure production water pipeline 6 to remove the residual citric acid cleaning liquid and the products produced by the reaction with scale in the tube bundle. Open all valves of the flushing water drainage pipeline 9 to the ditch, and the flushing water is discharged into the ditch 17 through the flushing water drainage pipeline 9 to ensure safe discharge. After the pipeline is drained, close the valve.

[0041] 5) Recovery:

[0042] After flushing is completed, close all valves and pipelines related to backwashing. After the process is checked to be correct, reopen the circulating water supply stop valve 4 and the circulating water return stop valve 5 to restore the normal circulating water flow of the water cooler 1. At this point, the flushing of the water cooler is completed.

Claims

1. An anti-flushing device for the outlet water cooler of a natural gas compressor, characterized in that, It includes a water cooler (1). The inlet of the tube side of the water cooler (1) is connected to a circulating upper water pipeline (2), and the outlet of the tube side of the water cooler (1) is connected to a circulating return water pipeline (3). A circulating upper water stop valve (4) and a circulating return water stop valve (5) are respectively provided at the inlet of the circulating upper water pipeline (2) and the outlet of the circulating return water pipeline (3); It also includes a high-pressure production water pipeline (6), a cleaning liquid inlet pipeline (7), a cleaning liquid drain pipeline (8) and a flushing water drain pipeline (9). The outlets of the high-pressure production water pipeline (6) and the cleaning liquid inlet pipeline (7) are respectively connected to the pipeline between the circulating return water stop valve (5) and the tube side outlet of the water cooler (1), and the inlets of the cleaning liquid drain pipeline (8) and the flushing water drain pipeline (9) are respectively connected to the pipeline between the circulating upper water stop valve (4) and the tube side inlet of the water cooler (1); A pulse generator (10) is provided on the high-pressure production water pipeline (6), and a water quality detector (11) is provided on the flushing water drain pipeline (9); It also includes a citric acid preparation tank (12). The inlet of the cleaning liquid inlet pipeline (7) and the outlet of the cleaning liquid drain pipeline (8) are respectively connected to the citric acid preparation tank (12).

2. The backwashing device for the outlet water cooler of the natural gas compressor according to claim 1, wherein A production water branch pipe (13) is connected to the high-pressure production water pipeline (6), and the outlet of the production water branch pipe (13) is connected to the citric acid preparation tank (12).

3. The backwashing device for the outlet water cooler of the natural gas compressor according to claim 1, wherein, It also includes a citric acid inlet pipeline (14), and the outlet of the citric acid inlet pipeline (14) is connected to the citric acid preparation tank (12).

4. The backwashing device for the outlet water cooler of the natural gas compressor according to claim 1, characterized in that, A citric acid flushing circulation pump (15) is provided on the cleaning liquid inlet pipeline (7).

5. The backwashing device for the outlet water cooler of the natural gas compressor according to claim 4, characterized in that, A circulation pump inlet filter (16) is provided on the inlet pipeline of the citric acid flushing circulation pump (15).

6. The anti-flushing device for the outlet water cooler of the natural gas compressor according to claim 1, wherein The outlet of the flushing water drain pipeline (9) is connected to a trench (17).

7. The backwashing device for the outlet water cooler of the natural gas compressor according to claim 1, characterized in that, A circulating cleaning liquid water cooler (18) is provided on the cleaning liquid drain pipeline (8).

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