Natural gas filtering device for boiler

Abstract

The utility model relates to natural gas delivery technical field, is a kind of natural gas filtering device for boiler, it includes jar body, support leg and PLC controller, jar body top is fixedly arranged with gland, jar body lower part is fixedly arranged with support leg, the upper portion in jar body, middle part is fixedly arranged with first support, second support respectively, first support is fixedly installed with filter cotton, second support is fixedly installed with filter screen, the drain line of jar body bottom is fixedly arranged with primary blowdown valve, primary blowdown valve is electrically connected with PLC controller, drain line lower part is fixedly communicated with tee pipe fitting, tee pipe fitting is fixedly communicated with first sewage collecting pipeline, second sewage collecting pipeline, jar body is fixedly communicated with air inlet pipeline, air outlet pipeline.The utility model is reasonable and compact in structure, convenient to use, it is through filter cotton and filter screen, two-stage filtration is carried out to impurity and moisture in natural gas, regularly blowdown, with safe, labor-saving, simple, efficient characteristics.

Description

Technical Field

[0001] This utility model relates to the field of natural gas transmission technology and is a natural gas filtration device for boilers. Background Technology

[0002] High-pressure steam injection boilers are crucial mechanical equipment in heavy oil development. They utilize natural gas as fuel, which is transported to the boiler room via a gas distribution skid and long-distance pipelines. The gas is then burned and heated by burners to produce high-pressure superheated steam from softened water (which reduces water hardness) in the oilfield. This high-pressure superheated steam is then injected into the oil wells to heat the crude oil in the oil reservoir, thereby reducing the viscosity of the heavy oil and increasing its recovery rate.

[0003] In actual production processes, natural gas often contains solid impurities, iron filings, and moisture, which affect the normal operation of control valves, monitoring instruments, and burners in natural gas pipelines. Natural gas pipelines are typically equipped with filters, currently using basket filters. These filters consist of a simple iron mesh, which is prone to clogging, corrosion, and damage. Furthermore, the liquid accumulated at the bottom of the filter cannot be automatically drained. Long-term operation will lead to problems such as reduced natural gas pipeline throughput and boiler flame detectors becoming easily covered by impurities. Frequent filter cleaning inevitably results in unplanned boiler shutdowns, thus affecting heavy oil recovery.

[0004] Therefore, it is essential to research and develop a natural gas filtration device for boilers. Summary of the Invention

[0005] This utility model provides a natural gas filtration device for boilers, which overcomes the shortcomings of the prior art. It can effectively solve the problems of easy clogging and corrosion damage of filters in the existing natural gas transportation process for boilers, thereby affecting the recovery rate of heavy oil.

[0006] The technical solution of this utility model is achieved through the following measures: A natural gas filtration device for boilers includes a tank, support legs, and a PLC controller. A pressure cap is fixedly installed on the top of the tank, and support legs are fixedly installed on the lower part of the tank. There are three support legs. A first bracket and a second bracket are fixedly installed in the upper and middle parts of the tank, respectively. Filter cotton is fixedly installed on the first bracket, and a filter screen is fixedly installed on the second bracket. A sewage discharge pipeline is fixedly connected to the bottom of the tank, and a primary sewage discharge valve is fixedly installed on the sewage discharge pipeline. The primary sewage discharge valve is electrically connected to the PLC controller.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0008] An air outlet pipe is fixedly connected to the tank between the aforementioned cap and the first support, and an air inlet pipe is fixedly connected to the tank between the support leg and the second support.

[0009] The lower part of the aforementioned sewage pipeline is fixedly connected to a tee fitting. The left port of the tee fitting is fixedly connected to a first sewage collection pipeline, and the right port of the tee fitting is fixedly connected to a second sewage collection pipeline.

[0010] The first sewage collection pipeline is equipped with a first-stage and a second-stage sewage discharge valve, which are fixedly installed from top to bottom. The second sewage collection pipeline is equipped with a third-stage and a fourth-stage sewage discharge valve, which are fixedly installed from top to bottom.

[0011] The first and second level drain valves and the second level drain valve are all electrically connected to the PLC controller.

[0012] The aforementioned first support includes two circular support surfaces, one above the other. Three ribs are fixedly installed on the support surfaces, with an included angle of 120° between any two adjacent ribs. The filter cotton is fixedly installed between the two circular support surfaces.

[0013] The filter cotton mentioned above is polyester fiber filter cotton.

[0014] The above filter screen is made of stainless steel with a pore size of 1mm.

[0015] This utility model has a reasonable and compact structure and is easy to use. It is equipped with a filter device on the natural gas transmission pipeline for boilers. It uses two-stage filtration through filter cotton and filter screen, and a timed sewage discharge is set through a PLC controller to realize online filtration and sewage discharge of impurities and moisture in natural gas. Natural gas flows continuously throughout the sewage discharge process, ensuring that the natural gas filter operates stably for a long period of time without affecting the normal operation of the boiler, thereby improving the recovery rate of heavy oil. It has the characteristics of safety, labor saving, simplicity and high efficiency. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.

[0017] Appendix Figure 2 For the appendix Figure 1 A magnified top view of the support surface of the first bracket in the structure.

[0018] Appendix Figure 1 The codes in the diagram are as follows: 1 for tank body, 2 for support leg, 3 for PLC controller, 4 for pressure cap, 5 for first support, 6 for second support, 7 for sewage discharge pipeline, 8 for primary sewage discharge valve, 9 for air outlet pipeline, 10 for air inlet pipeline, 11 for tee fitting, 12 for first sewage collection pipeline, 13 for second sewage collection pipeline, 14 for first and second-level sewage discharge valves, 15 for second and second-level sewage discharge valves, 16 for third and second-level sewage discharge valves, 17 for fourth and second-level sewage discharge valves, 18 for support surface, and 19 for rib. Detailed Implementation

[0019] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0020] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.

[0021] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0023] Example 1: As shown in the attached document Figure 1 As shown, the natural gas filtration device for the boiler includes a tank 1, support legs 2, and a PLC controller 3. A pressure cap 4 is fixedly installed on the top of the tank 1, and support legs 2 are fixedly installed on the bottom of the tank 1. There are three support legs 2. A first bracket 5 and a second bracket 6 are fixedly installed in the upper and middle parts of the tank 1, respectively. Filter cotton is fixedly installed on the first bracket 5, and a filter screen is fixedly installed on the second bracket 6. A sewage discharge pipeline 7 is fixedly connected to the bottom of the tank 1. A primary sewage discharge valve 8 is fixedly installed on the sewage discharge pipeline 7. The primary sewage discharge valve 8 is electrically connected to the PLC controller 3.

[0024] As needed, natural gas for the boiler enters tank 1 and passes through the filter screen and filter cotton from bottom to top for filtration and separation. The filtered wastewater is discharged from the bottom of tank 1. The PLC controller 3 controls the opening and closing of the primary drain valve 8, and the filtered wastewater is discharged through the drain pipeline 7 and collected in the boiler drain tank for unified treatment.

[0025] In this invention, after the natural gas passes through the filter screen, the moisture, solid impurities, iron filings and sand particles in the natural gas are intercepted. Under the action of gravity, the filtered wastewater falls into the bottom of the tank 1. The natural gas that has been initially filtered by the filter screen then passes through the filter cotton, where the residual moisture in the natural gas is further absorbed. The filtered natural gas is then output through the gas outlet pipeline 9.

[0026] As needed, the primary drain valve 8 can be set to a dual-mode manual / electric switch.

[0027] The above-mentioned natural gas filtration device for boilers can be further optimized and / or improved according to actual needs:

[0028] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1As shown, an air outlet pipe 9 is fixedly connected to the tank 1 between the pressure cap 4 and the first support 5, and an air inlet pipe 10 is fixedly connected to the tank 1 between the support leg 2 and the second support 6.

[0029] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, a tee fitting 11 is fixedly connected to the lower part of the sewage pipeline 7. The left opening of the tee fitting 11 is fixedly connected to the first sewage collection pipeline 12, and the right opening of the tee fitting 11 is fixedly connected to the second sewage collection pipeline 13.

[0030] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, a first-level sewage discharge valve 14 and a second-level sewage discharge valve 15 are fixedly installed on the first sewage collection pipeline 12 from top to bottom, and a third-level sewage discharge valve 16 and a fourth-level sewage discharge valve 17 are fixedly installed on the second sewage collection pipeline 13 from top to bottom.

[0031] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, the first and second stage drain valves 14 and 15 are both electrically connected to the PLC controller 3.

[0032] As needed, the PLC controller 3 is set to a timed sewage discharge program, which controls the opening and closing of the primary sewage discharge valve 8, the first and second secondary sewage discharge valves 14, and the second and third secondary sewage discharge valves 15 to achieve automatic discharge of filtered sewage.

[0033] Based on the drainage situation, the moisture content in the natural gas is determined. Every 6 hours, firstly, the primary drain valve 8 is opened, and the filtered sewage in the drain line 7 enters the first collection line 12 and the second collection line 13. After 1 minute, the primary drain valve 8 is closed. After 30 minutes, the first and second secondary drain valves 14 and 15 are opened in sequence, and the filtered sewage is discharged from the first collection line 12. After 1 minute, the first and second secondary drain valves 14 and 15 are closed in sequence.

[0034] When the first and second stage drain valves 14 and 15 malfunction, sewage is discharged manually. First, open the first stage drain valve 8 to allow the filtered sewage to enter the second collection pipeline 13. Then, close the first stage drain valve 8 and open the third and fourth stage drain valves 16 and 17 to discharge the filtered sewage from the second collection pipeline 13. Finally, close the third and fourth stage drain valves 16 and 17. Normally, every 24 hours, manually open the third and fourth stage drain valves 16 and 17 to discharge the filtered sewage from the second collection pipeline 13.

[0035] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 2As shown, the first bracket 5 includes two circular support surfaces 18, one above the other. Three ribs 19 are fixedly installed on the support surfaces 18. The included angle between any two adjacent ribs 19 is 120°. The filter cotton is fixedly installed between the two circular support surfaces 18.

[0036] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 1 and 2 As shown, the filter cotton is made of polyester fiber.

[0037] Example 8: It differs from Examples 1 to 7 in that: as shown in the appendix Figure 1 and 2 As shown, the filter screen is made of stainless steel with a pore size of 1mm.

[0038] Depending on the needs, the pipelines and equipment of the natural gas filtration device for the boiler can also be equipped with conventional valves, thermometers, and pressure gauges known in the art, according to production requirements. The PLC controller can be a Siemens S7-1500, which is equipped with a Yokogawa CS3000 DCS control system.

[0039] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0040] The usage process of this utility model embodiment is as follows: First, the natural gas for the boiler enters the tank 1 through the inlet pipeline 10, passes through the filter screen and filter cotton in sequence, is filtered and separated, and is then output through the outlet pipeline 9; next, the filtered wastewater enters the sewage discharge pipeline 7 from the bottom of the tank 1; finally, the primary sewage discharge valve 8, the first and second secondary sewage discharge valves 14, and the second and second secondary sewage discharge valves 15 are opened in sequence, and the filtered wastewater is discharged through the first sewage collection pipeline 12. The wastewater is collected and treated uniformly.

Claims

1. A natural gas filtration device for boilers, characterized in that... The system includes a tank, support legs, and a PLC controller. A pressure cap is fixedly installed on the top of the tank, and three support legs are fixedly installed on the bottom of the tank. A first bracket and a second bracket are fixedly installed in the upper and middle parts of the tank, respectively. Filter cotton is fixedly installed on the first bracket, and a filter screen is fixedly installed on the second bracket. A sewage discharge pipeline is fixedly connected to the bottom of the tank, and a primary sewage discharge valve is fixedly installed on the sewage discharge pipeline. The primary sewage discharge valve is electrically connected to the PLC controller.

2. The boiler natural gas filtration device according to claim 1, characterized in that... An air outlet line is fixedly connected to the tank between the pressure cap and the first support, and an air inlet line is fixedly connected to the tank between the support leg and the second support.

3. The boiler natural gas filtration device according to claim 1 or 2, characterized in that... A tee fitting is fixedly connected to the lower part of the sewage pipeline. The left port of the tee fitting is fixedly connected to the first sewage collection pipeline, and the right port of the tee fitting is fixedly connected to the second sewage collection pipeline.

4. The boiler natural gas filtration device according to claim 3, characterized in that... The first sewage collection pipeline is fixedly equipped with a first-level sewage discharge valve and a second-level sewage discharge valve from top to bottom, and the second sewage collection pipeline is fixedly equipped with a third-level sewage discharge valve and a fourth-level sewage discharge valve from top to bottom.

5. The boiler natural gas filtration device according to claim 4, characterized in that... Both the first and second level drain valves and the second level drain valve are electrically connected to the PLC controller.

6. The natural gas filtration device for boilers according to claim 1, 2, 4, or 5, characterized in that... The first support includes two circular support surfaces, one above the other. Three ribs are fixedly installed on the support surfaces, with an included angle of 120° between any two adjacent ribs. The filter cotton is fixedly installed between the two circular support surfaces.

7. The boiler natural gas filtration device according to claim 6, characterized in that... The filter cotton is made of polyester fiber.

8. The boiler natural gas filtration device according to claim 1, 2, 4, 5, or 7, characterized in that... The filter screen is made of stainless steel with a pore size of 1mm.

9. The boiler natural gas filtration device according to claim 3, characterized in that... The filter screen is made of stainless steel with a pore size of 1mm.

10. The boiler natural gas filtration device according to claim 6, characterized in that... The filter screen is made of stainless steel with a pore size of 1mm.

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