A buffer barrel for effectively reducing buffering corrosion

Abstract

The present invention discloses a buffer bucket that can effectively reduce erosion, which includes a tee main pipe, a first deflector plate, a main pipe and a branch pipe. A first main pipe flange is welded to one end of the tee main pipe, and a first intermediate flange is welded to the other end of the tee main pipe. The branch pipe is connected and arranged on one side wall of the tee main pipe, and the branch pipe is welded to the branch pipe flange. A second intermediate flange is welded to one end of the main pipe, and the first intermediate flange is bolted to the second intermediate flange. The first deflector plate is clamped between the first intermediate flange and the second intermediate flange. A plurality of diversion holes are formed in the first deflector plate. A second main pipe flange is welded to the other end of the main pipe, and the second main pipe flange is bolted to the flange cover. An erosion-resistant layer is provided on the flange cover. The present invention can optimize the flow pattern of the fluid in the buffer bucket, slow down the erosion of the buffer bucket, improve the service life of the flange cover, solve the problem of short service life of the buffer bucket in the black water and ash water treatment systems, and increase the continuous and safe operation time of the system.

Description

Technical Field

[0001] The present invention relates to a corrosion inhibition device, specifically a buffer barrel that can effectively reduce corrosion. Background Art

[0002] China is a country lacking oil and gas, and relatively rich in coal resources. In recent years, the domestic coal chemical industry has developed rapidly, and the coal gasification process has been widely used in projects such as coal-to-oil, coal-to-hydrogen, coal-to-methanol, coal-to-olefins, and coal-to-synthetic ammonia.

[0003] Taking pulverized coal gasification as an example, the main process flow is as follows: A mixture of pulverized coal, oxygen, and steam is sprayed into the reaction chamber of the gasifier through a pulverized coal burner for gasification reaction to generate raw syngas. The raw syngas leaves the quench chamber of the gasifier and enters the mixer, where it is mixed with the clarified water from the hot water chamber of the evaporative hot water tower. Then, the water / raw syngas mixture enters the cyclone separator for gas / water separation. Most of the fine ash in the syngas enters the liquid phase and is continuously discharged from the bottom of the cyclone separator into the black water and ash water treatment system. The black water and ash water treatment system is one of the important systems of the coal gasification plant. This system operates under harsh conditions such as high temperature, high pressure difference, and liquid-solid erosion for a long time, and the medium is prone to flashing during the pressure reduction process, having the dual risks of erosion wear and cavitation failure. From the operation of the built coal gasification plants, the buffer barrel behind the angle valve in the black water and ash water treatment system is severely eroded, often showing local thinning and perforation leakage, which not only affects the production plan, cost, and efficiency of the enterprise, but also seriously threatens safe production, and has become an important obstacle restricting the long-term stable operation of the coal gasification plant.

[0004] Currently, a magnified three-way buffer barrel is directly connected behind the angle valve in the black water and ash water treatment system. The bottom of the buffer barrel is connected by a flange cover, and the branch pipe is connected to the equipment. After the device operates, the flange cover at the bottom of the buffer barrel and the intersection line of the branch pipe and the three-way main pipe are quickly worn through, resulting in leakage, and it is necessary to perform on-line maintenance in a timely manner or replace the buffer barrel as a whole. The following problems arise: 1) The leakage of high-temperature and high-pressure black water and ash water seriously threatens the safe production of the enterprise; 2) The outflow of black water and ash water from the pipeline causes environmental pollution; 3) Frequent shutdowns for replacing the buffer barrel as a whole cannot meet the requirements of the long-term stable operation of the coal gasification plant; 4) The service life of the buffer barrel is short, and the maintenance or replacement of the buffer barrel greatly increases the operation cost of the device. Summary of the Invention

[0005] The technical problem to be solved by the present invention is, in view of the deficiencies of the prior art, to provide a buffer barrel that can effectively reduce corrosion, which can solve the problem of the short service life of the buffer barrel in the black water and ash water treatment system and improve the continuous safe operation time of the system.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: a buffer barrel for effectively reducing erosion, comprising a tee main pipe, a first deflector, a main pipe and a branch pipe. One end of the tee main pipe is welded with a first main pipe flange, and the other end of the tee main pipe is welded with a first intermediate flange. The branch pipe is connected and arranged on one side wall of the tee main pipe, and the branch pipe is welded with a branch pipe flange. One end of the main pipe is welded with a second intermediate flange, and the first intermediate flange is bolted to the second intermediate flange. The first deflector is clamped between the first intermediate flange and the second intermediate flange. A plurality of diversion holes are formed in the first deflector. The other end of the main pipe is welded with a second main pipe flange, and the second main pipe flange is bolted to a flange cover. An erosion-resistant layer is arranged on the flange cover.

[0007] The present invention optimizes the flow pattern of the fluid in the buffer barrel by designing the first deflector to slow down the erosion of the buffer barrel. The first deflector has the function of diversion and can reduce the flow velocity of solid-phase particles in the fluid. At the same time, the erosion-resistant layer arranged on the inner side of the flange cover in the present invention has impact resistance, can effectively solve the erosion problem of the flange cover by solid-phase particles in the fluid, and improve the service life of the flange cover. In addition, the bolt connection method between the first intermediate flange and the second intermediate flange facilitates the replacement of the first deflector and the tee main pipe and the assembly of related components. The present invention solves the problem of short service life of the buffer barrel in the black water and grey water treatment systems and improves the continuous and safe operation time of the system.

[0008] Preferably, the erosion-resistant layer is a cemented carbide layer or a wear-resistant ceramic layer. The cemented carbide layer can be set by surfacing cemented carbide, and the wear-resistant ceramic layer can be set by nesting wear-resistant ceramics. In actual applications, erosion-resistant layers of other materials can also be used.

[0009] Preferably, the plurality of diversion holes include a plurality of circular first diversion holes and a plurality of circular second diversion holes. The apertures of the plurality of first diversion holes are the same and are uniformly arranged on the semi-circle far from the branch pipe. The plurality of second diversion holes are arranged on the semi-circle close to the branch pipe. The plurality of second diversion holes are arranged in multiple rows. The apertures of the second diversion holes in the same row are the same. From the central axis of the first deflector to the edge of the first deflector close to the branch pipe, the apertures of the second diversion holes in each row gradually decrease. Further, the opening areas of the plurality of first diversion holes and the plurality of second diversion holes are respectively approximately equal to the cross-sectional area of the branch pipe. While playing the role of diversion, the above first diversion holes and second diversion holes are beneficial to keeping solid-phase particles away from the second intermediate flange, the main pipe, the second main pipe flange and the inner side wall of the flange cover, so as to achieve a better anti-impact effect and ensure the service life of the buffer barrel.

[0010] Preferably, the included angle between the center line of the branch pipe and the center line of the tee main pipe is 45°, and the branch pipe is obliquely welded to the outer side of the end of the tee main pipe where the first main flange is located. The design of the above-mentioned branch pipe is beneficial to further optimize the fluid flow field in the buffer tank and reduce the erosion of the fluid on the intersection line of the branch pipe and the tee main pipe.

[0011] Preferably, a baffle is arranged in the tee main pipe. The baffle is covered on the front side of the intersection line of the branch pipe and the tee main pipe. One end of the baffle is welded to the inner side wall of the tee main pipe and is close to the branch pipe, and the other end of the baffle is close to the central axis of the first deflector. A plurality of third diversion holes are opened on the baffle. Further, the plurality of third diversion holes are all long strip-shaped square holes, and the opening area of the plurality of third diversion holes is approximately equal to the cross-sectional area of the branch pipe. The above-mentioned baffle also has the functions of guiding the flow and slowing down the fluid flow velocity, which helps to achieve a better effect of reducing buffering and erosion.

[0012] Preferably, a second deflector is arranged in the main pipe. One end of the second deflector is welded to the central axis of the first deflector, and the other end of the second deflector is close to the central axis of the erosion-resistant layer. Further, a plurality of fourth diversion holes are opened on the second deflector. Furthermore, the plurality of fourth diversion holes are all circular, and the plurality of fourth diversion holes are uniformly arranged on the second deflector. The above-mentioned second deflector has a guiding function and can further reduce the erosion of the flange cover.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) The present invention optimizes the flow form of the fluid in the buffer tank by designing the first deflector to slow down the erosion of the buffer tank. The first deflector has a guiding function and can also reduce the flow velocity of the solid-phase particles in the fluid.

[0015] (2) The erosion-resistant layer arranged on the inner side of the flange cover of the present invention has anti-impact performance, can effectively solve the erosion problem of the solid-phase particles in the fluid on the flange cover, and improve the service life of the flange cover.

[0016] (3) The bolt connection mode between the first intermediate flange and the second intermediate flange facilitates the replacement of the first deflector and the tee main pipe and the assembly of related components.

[0017] (4) The present invention comprehensively optimizes the fluid flow field in the buffer tank, solves the problem of short service life of the buffer tank in the black water and grey water treatment system, and improves the continuous and safe operation time of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is the front view of the buffer bucket in Embodiment 1;

[0019] Figure 2 It is Figure 1 the A-A cross-sectional view in

[0020] Figure 3 It is Figure 1 the B-B cross-sectional view in

[0021] Figure 4 It is the front view of the buffer bucket in Embodiment 2;

[0022] Figure 5 It is Figure 4 the C-C cross-sectional view in

[0023] Figure 6 It is Figure 4 the D-D cross-sectional view in

[0024] Figure 7 It is Figure 4 the E-E cross-sectional view in

[0025] Figure 8 It is the front view of the buffer bucket in Embodiment 3;

[0026] Figure 9 It is Figure 8 the F-F cross-sectional view in

[0027] Figure 10 It is Figure 8 the G-G cross-sectional view in

[0028] Figure 11 It is Figure 8 the H-H cross-sectional view in

[0029] Figure 12 It is Figure 8 the I-I cross-sectional view in Specific embodiments

[0030] The present invention will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0031] The buffer bucket for effectively reducing buffering and corrosion in Embodiment 1, as Figures 1 to 3As shown in the figure, it includes a three-way main pipe 1, a first deflector 2, a main pipe 3 and a branch pipe 4. One end of the three-way main pipe 1 is welded with a first main pipe flange 11, and the other end of the three-way main pipe 1 is welded with a first intermediate flange 12. The branch pipe 4 is connected and arranged on one side wall of the three-way main pipe 1, and the branch pipe 4 is welded with a branch pipe flange 41. One end of the main pipe 3 is welded with a second intermediate flange 31. The first intermediate flange 12 is bolted to the second intermediate flange 31. The first deflector 2 is clamped between the first intermediate flange 12 and the second intermediate flange 31. A plurality of diversion holes are provided on the first deflector 2. The other end of the main pipe 3 is welded with a second main pipe flange 32. The second main pipe flange 32 is bolted to a flange cover 5. A hard alloy layer 51 is built-up welded on the flange cover 5. The plurality of diversion holes include a plurality of circular first diversion holes 21 and a plurality of circular second diversion holes 22. The apertures of the plurality of first diversion holes 21 are the same and are uniformly arranged on the semi-circle far from the branch pipe 4. The plurality of second diversion holes 22 are arranged on the semi-circle close to the branch pipe 4. The plurality of second diversion holes 22 are arranged in multiple rows. The apertures of the second diversion holes 22 in the same row of the second diversion holes 22 are the same. From the central axis of the first deflector 2 to the edge of the first deflector 2 close to the branch pipe 4, the apertures of the second diversion holes 22 in each row of the second diversion holes 22 gradually decrease. The opening areas of the plurality of first diversion holes 21 and the plurality of second diversion holes 22 are respectively approximately equal to the cross-sectional area of the branch pipe 4.

[0032] The buffer bucket for effectively reducing buffering and corrosion of Example 2 is different from that of Example 1 in that, in Example 2, as Figures 4 to 7 shown in the figure, the included angle between the center line of the branch pipe 4 and the center line of the three-way main pipe 1 is 45°. The branch pipe 4 is obliquely welded to the outside of the end of the three-way main pipe 1 with the first main pipe flange 11; a wear-resistant ceramic layer 52 is nested on the flange cover 5; a baffle 6 is arranged in the three-way main pipe 1. The baffle 6 covers the front side of the intersection line of the branch pipe 4 and the three-way main pipe 1. One end of the baffle 6 is welded to the inner side wall of the three-way main pipe 1 and is close to the branch pipe 4. The other end of the baffle 6 is close to the central axis of the first deflector 2. A plurality of third diversion holes 61 are provided on the baffle 6. The plurality of third diversion holes 61 are all long strip-shaped square holes. The opening area of the plurality of third diversion holes 61 is approximately equal to the cross-sectional area of the branch pipe 4.

[0033] The buffer bucket for effectively reducing buffering and corrosion of Example 3 is different from that of Example 2 in that, in Example 3, as Figures 8 to 12 shown in the figure, a hard alloy layer 51 is built-up welded on the flange cover 5; a second deflector 7 is arranged in the main pipe 3. One end of the second deflector 7 is welded to the central axis of the first deflector 2. The other end of the second deflector 7 is close to the central axis of the hard alloy layer 51. A plurality of fourth diversion holes 71 are provided on the second deflector 7. The plurality of fourth diversion holes 71 are all circular. The plurality of fourth diversion holes 71 are uniformly arranged on the second deflector 7.

[0034] The above buffer bucket optimizes the flow pattern of the fluid in the buffer bucket by designing the first deflector plate 2 to slow down the erosion of the buffer bucket. The first deflector plate 2 has the function of guiding the flow and reducing the flow velocity of the solid-phase particles in the fluid. At the same time, the erosion-resistant layer provided on the inner side of the flange cover 5 has impact resistance, which can effectively solve the erosion problem of the solid-phase particles in the fluid on the flange cover 5 and improve the service life of the flange cover 5. In addition, the first intermediate flange 12 and the second intermediate flange 31 are bolted together, which facilitates the replacement of the first deflector plate 2 and the tee main pipe 1 and the assembly of related components.

Claims

1. A buffer bucket for effectively reducing erosion, characterized in that, it includes a tee main pipe, a first deflector plate, a main pipe and a branch pipe. One end of the tee main pipe is welded with a first main pipe flange, and the other end of the tee main pipe is welded with a first intermediate flange. The branch pipe is connected and arranged on one side wall of the tee main pipe, and the branch pipe is welded with a branch pipe flange. One end of the main pipe is welded with a second intermediate flange, and the first intermediate flange is bolted to the second intermediate flange. The first deflector plate is clamped between the first intermediate flange and the second intermediate flange. A plurality of flow guiding holes are formed in the first deflector plate. The other end of the main pipe is welded with a second main pipe flange, and the second main pipe flange is bolted to a flange cover. An erosion-resistant layer is provided on the flange cover. The plurality of flow guiding holes include a plurality of circular first flow guiding holes and a plurality of circular second flow guiding holes. The apertures of the plurality of first flow guiding holes are the same and are uniformly arranged on the semi-circle far from the branch pipe. The plurality of second flow guiding holes are arranged on the semi-circle close to the branch pipe. The plurality of second flow guiding holes are arranged in multiple rows. The apertures of the second flow guiding holes in the same row of the second flow guiding holes are the same. From the central axis of the first deflector plate to the edge of the first deflector plate close to the branch pipe side, the apertures of the second flow guiding holes in each row of the second flow guiding holes gradually decrease.

2. The buffer bucket for effectively reducing erosion according to claim 1, characterized in that, the erosion-resistant layer is a cemented carbide layer or a wear-resistant ceramic layer.

3. The buffer bucket for effectively reducing erosion according to claim 1, characterized in that, the opening areas of the plurality of first flow guiding holes and the plurality of second flow guiding holes are respectively approximately equal to the cross-sectional area of the branch pipe.

4. The buffer bucket for effectively reducing erosion according to claim 1, characterized in that, the included angle between the center line of the branch pipe and the center line of the tee main pipe is 45°, and the branch pipe obliquely faces the outside of the end of the tee main pipe welded with the first main pipe flange.

5. The buffer bucket for effectively reducing erosion according to any one of claims 1-4, characterized in that, a baffle is arranged in the tee main pipe. The baffle covers the front side of the intersection line of the branch pipe and the tee main pipe. One end of the baffle is welded to the inner side wall of the tee main pipe and is close to the branch pipe. The other end of the baffle is close to the central axis of the first deflector plate. A plurality of third flow guiding holes are formed in the baffle.

6. The buffer bucket for effectively reducing erosion according to claim 5, characterized in that, the plurality of third flow guiding holes are all long strip-shaped square holes, and the opening area of the plurality of third flow guiding holes is approximately equal to the cross-sectional area of the branch pipe.

7. The buffer bucket for effectively reducing erosion according to claim 1, characterized in that, a second deflector plate is arranged in the main pipe. One end of the second deflector plate is welded to the central axis of the first deflector plate, and the other end of the second deflector plate is close to the central axis of the erosion-resistant layer.

8. A buffer barrel for effectively reducing buffering and corrosion, according to claim 7, characterized in that, a plurality of fourth diversion holes are formed in the second diversion plate.

9. A buffer barrel for effectively reducing buffering and corrosion, according to claim 8, characterized in that, the plurality of fourth diversion holes are all circular, and the plurality of fourth diversion holes are uniformly arranged on the second diversion plate.

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