A steam drum for a water-cooled wall directly connected to a waste boiler with full heat recovery gasification furnace

Abstract

The present invention relates to a steam drum structure, specifically a steam drum for a water-cooled wall directly connected to a waste boiler full heat recovery gasifier, which solves the technical problems of the background technology, wherein the bottom surface of the bottom support bucket of the cyclone separator is tilted upward; the steam drum includes a trapezoidal corrugated plate separator, a cleaning orifice plate, a porous plate and a top corrugated plate separator, the trapezoidal corrugated plate separator is installed on the top of the large-diameter cyclone separator to replace the straight-cylinder corrugated plate separator; the cleaning orifice plate is installed on the inner wall of the pressure vessel cylinder above the trapezoidal corrugated plate separator and below the water supply distribution device, and the top corrugated plate separator and the porous plate are fixed on the inner wall of the pressure vessel cylinder above the water supply distribution device in sequence from near to far; the cleaning orifice plate is provided with overflow gates around it to prevent water from flowing sideways. Compared with the steam drum in the background technology, the present invention adds three separation processes to increase the steam processing capacity, increases steam cleaning, has a good steam-water separation effect, can produce high-quality steam, and is safe and reliable.

Description

Technical Field

[0001] The invention relates to a steam drum structure for a high-efficiency and energy-saving water-cooled wall directly connected to a waste boiler full heat recovery gasifier, in particular to a steam drum for a water-cooled wall directly connected to a waste boiler full heat recovery gasifier. Background Art

[0002] The high-efficiency and energy-saving water-cooled wall direct-connected waste boiler full heat recovery gasifier or water-cooled wall direct-connected waste boiler full heat recovery gasifier can not only absorb the sensible heat and latent heat of water-coal slurry combustion, but also further absorb the heat of high-temperature synthesis gas, realizing the "full heat recovery" of the gasifier heat, and producing a large amount of high-temperature and high-pressure steam as a by-product. The recovered high-temperature and high-pressure steam can be used for IGCC power generation and can also be used for downstream production steam. At the same time, it can reduce the load of the boiler, save a lot of coal, and reduce the pollutant emissions caused by the use of coal-fired boilers. Since the high-efficiency and energy-saving water-cooled wall direct-connected waste boiler full heat recovery gasifier realizes the full heat recovery of the gasifier heat, the steam output has increased by 20% to 30%. At the same time, the downstream production has put forward higher requirements on the steam quality, that is, the water content in the steam.

[0003] There is a kind of steam drum in the prior art, whose shell is as Figure 1 As shown, it includes a pressure vessel cylinder 19, both ends of the pressure vessel cylinder 19 are connected to a pressure vessel head 17, the pressure vessel head 17 is connected to a manhole device 18, and two saddles 20 are welded at the lower end of the pressure vessel cylinder 19. The pressure vessel cylinder 19 is also provided with a temperature measuring device 22. Finally, the entire welded gasifier shell is placed on a movable base 21. The shell of the steam drum adapted for the water-cooled wall directly connected to the waste boiler full heat recovery gasifier is provided with a reagent inlet, a waste boiler steam and water inlet, a boiler water outlet, a high-pressure steam outlet, a high-pressure nitrogen inlet, a low-pressure nitrogen inlet, an emergency discharge port, a surface sewage outlet, a vent and a steam inlet. The internal device of the steam drum adapted for the water-cooled wall directly connected to the waste boiler full heat recovery gasifier is shown as follows. Figure 2 The main components shown are a large-diameter cyclone separator 2, a cyclone separator bottom bucket 3, a baffle 8, a steam device for starting 9, a dosing device 10, an emergency water discharge device 11, a sewage discharge device 12, a water level gauge protection device 13, an anti-vortex device 14, a grid device 15 and a steam-water distribution device 16, but the Figure 2 The difference is that the top of the large-diameter cyclone separator 2 in the existing steam drum includes a straight-cylindrical corrugated plate separator, and the bottom surface of the bottom bucket 3 of the cyclone separator is horizontal.

[0004] The steam-water separation process of the above-mentioned steam drum goes through two stages: the first separation is that the steam-water mixture is introduced into the large-diameter cyclone separator 2 along the tangential direction, so that the steam changes from linear motion to rotational motion, thereby forming centrifugal force, and the water flows down the cylinder wall of the large-diameter cyclone separator 2, and the steam spirally rises inside the cylinder wall of the large-diameter cyclone separator 2; the second separation is carried out in the straight-cylindrical corrugated plate separator on the top of the large-diameter cyclone separator 2, the outer portion of the straight-cylindrical corrugated plate separator is cylindrical, and the inner portion of the straight-cylindrical corrugated plate separator is vertically arranged with several rows of corrugated plates; finally, the steam enters the pipeline through the outlet and is transported by the pipeline to the downstream production steam use location.

[0005] At present, the steam-water separation effect of this steam drum is not ideal, and the water content in the treated steam is relatively high. The steam drum can only be adapted to the semi-waste boiler water-coal slurry water-cooled wall gasifier, and it cannot meet the requirements of the existing high-efficiency and energy-saving water-cooled wall directly connected to the waste boiler full heat recovery gasifier for the processing steam volume and steam quality. Therefore, it is imperative to design a steam drum that can increase the processing steam volume and improve the steam quality. Summary of the invention

[0006] The present invention aims to solve the technical problem that the existing steam drum cannot meet the requirements of the high-efficiency and energy-saving water-cooled wall directly connected to the waste boiler full heat recovery gasification furnace on the processing steam volume and steam quality, and provides a steam drum for the water-cooled wall directly connected to the waste boiler full heat recovery gasification furnace.

[0007] The technical means adopted by the present invention to solve the technical problem are: a steam drum for a water-cooled wall directly connected waste boiler full heat recovery gasifier, comprising a pressure vessel cylinder, a large-diameter cyclone separator and a bottom support bucket of the cyclone separator, wherein the bottom surface of the bottom support bucket of the cyclone separator is inclined upward; the steam drum also comprises a water supply distribution device, a trapezoidal corrugated plate separator, a cleaning orifice plate, a porous plate and a top corrugated plate separator, wherein the trapezoidal corrugated plate separator is installed on the top of the large-diameter cyclone separator to replace the straight-cylinder corrugated plate separator, wherein the outer wall of the trapezoidal corrugated plate separator is a trapezoidal cylinder, and the trapezoidal corrugated plate separator is a trapezoidal The small mouth of the separator is facing upward and the large mouth is facing downward; the cleaning orifice plate is installed on the inner wall of the pressure vessel cylinder above the trapezoidal corrugated plate separator, the water distribution device is installed on the inner wall of the pressure vessel cylinder above the cleaning orifice plate, the water distribution device is used to distribute water to the cleaning orifice plate, the top corrugated plate separator and the porous plate are fixed on the inner wall of the pressure vessel cylinder above the water distribution device from near to far, the cleaning orifice plate, the top corrugated plate separator and the porous plate are distributed along the length direction of the sealing cavity in the pressure vessel cylinder; overflow gates are arranged around the cleaning orifice plate to prevent water from flowing sideways.

[0008] The bottom surface of the bottom bucket of the cyclone separator is tilted upwards so that the water flowing out of the bottom of the large-diameter cyclone separator can be buffered by the upward tilted bottom surface of the bottom bucket of the cyclone separator. The water flows down along the upward tilted bottom surface, which can minimize the shaking of the equipment caused by the impact of the water flow, ensure the stability of the structure, and the accuracy of the liquid level monitoring inside the equipment; the main function of the trapezoidal corrugated plate separator is to evenly distribute the steam, eliminate the rotation of the steam flow and further separate the water. The outer wall of the trapezoidal corrugated plate separator is a trapezoidal cylinder, which can The first step ensures that the rising water vapor is blocked by the trapezoidal cylinder after contacting it, and then condenses and flows down along its inner wall, thereby increasing the steam processing capacity and achieving good steam-water separation effect. When the steam passes through the tortuous channel between the corrugated plates in the trapezoidal corrugated plate separator, the flow direction is frequently changed. Due to the effect of inertia, the water contained in the steam hits the corrugated plates and forms a continuous water film. The water film flows vertically downward, passes through the upwardly inclined bottom surface of the bottom bucket of the cyclone separator and returns to the water chamber, while the steam flows out from the upper part of the trapezoidal corrugated plate separator. The separated steam continues to flow upward to pass through the cleaning orifice plate for steam cleaning. The water distribution device not only distributes the water to the predetermined parts and mixes it with the boiler water to organize reasonable water conditions in the boiler, but also distributes water to the cleaning orifice plate to ensure that there is a continuous cleaning water layer on the cleaning orifice plate. The overflow gate around the cleaning orifice plate can ensure that the cleaning water layer does not flow sideways. The main function of the cleaning orifice plate is to allow steam to pass through a relatively clean water layer or water mist to use the difference in concentration between the feed water and the boiler water to reduce the salt dissolved in the steam and prevent the salt content in the steam from being too high. Compared with the existing steam drum in the background technology, the steam passing through the cleaning orifice plate is equivalent to the third steam-water separation process. The cleaned steam continues to flow upward in the top corrugated plate separator to carry out the fourth steam-water separation process. The main function of the top corrugated plate separator is to separate the steam using the corrugated track of the corrugated plate. When the steam passes through the tortuous channel between the corrugated plates, it frequently changes its flow direction. Due to the inertia, the water contained in the steam hits the corrugated plate and forms a continuous water film. The water film flows vertically downward and returns to the water chamber, while the steam flows out from the upper part of the top corrugated plate separator. The separated steam continues to flow upward in the porous plate for the fifth steam-water separation. When the steam passes through the porous plate, the throttling effect of the porous plate makes the steam evenly distributed along the length and width of the drum, preventing the local concentration of the steam and reducing the rising speed of the steam, which is conducive to gravity separation. The separated steam continues to flow upward, and after being blocked by the baffle, it finally enters the pipeline through the steam outlet and is transported by the pipeline to the downstream production steam.

[0009] Preferably, the large mouth diameter of the trapezoidal corrugated plate separator is larger than the top mouth diameter of the large diameter cyclone separator, and the small mouth diameter of the trapezoidal corrugated plate separator is less than or equal to the top mouth diameter of the large diameter cyclone separator. In this way, while ensuring the steam processing capacity of the trapezoidal corrugated plate separator per unit time, it can also ensure that all the steam flowing out of the large diameter cyclone separator is processed by the trapezoidal corrugated plate separator before flowing out.

[0010] The beneficial effects of the present invention are as follows: the steam drum for a water-cooled wall directly connected waste boiler full heat recovery gasifier described in the present invention ensures convenient connection with the waste heat boiler and the convection evaporator of the high-efficiency and energy-saving water-cooled wall directly connected waste boiler full heat recovery gasifier, while realizing the utilization of waste heat recovery of the high-efficiency and energy-saving water-cooled wall directly connected waste boiler full heat recovery gasifier, and performs five separation processes on the steam, which adds three separation processes compared with the steam drum in the background technology, increases the steam processing capacity, and increases steam cleaning, and has a good steam-water separation effect, can produce high-quality steam, and has a simple structure, is easy to install, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the outer shell structure of the steam drum described in the background technology of the present invention.

[0012] Figure 2 This is a schematic diagram of the internal structure of a full heat recovery gasifier for a water-cooled wall directly connected to a waste boiler according to the present invention.

[0013] Figure 3 It is a schematic diagram of the structure of the cleaning orifice plate described in the present invention.

[0014] Figure 4 It is a schematic diagram of the structure of the porous plate described in the present invention.

[0015] In the figure: 1-water distribution device, 2-large diameter cyclone separator, 3-bottom bucket of cyclone separator, 4-trapezoidal corrugated plate separator, 5-cleaning orifice plate, 6-top corrugated plate separator, 7-porous plate, 8-baffle, 9-start-up steam device, 10-dosing device, 11-emergency water discharge device, 12-sewage discharge device, 13-water level gauge protection device, 14-anti-vortex device, 15-grid device, 16-steam-water distribution device, 17-pressure vessel head, 18-manhole device, 19-pressure vessel cylinder, 20-saddle, 21-movable base, 22-temperature measuring device. DETAILED DESCRIPTION

[0016] Reference Figure 1 , 2 , 3, 4, a steam drum for a water-cooled wall directly connected waste boiler full heat recovery gasification furnace according to the present invention is described in detail.

[0017] A steam drum for a water-cooled wall directly connected waste boiler full heat recovery gasifier, comprising a pressure vessel cylinder 19, a large-diameter cyclone separator 2 and a bottom support bucket 3 of the cyclone separator, wherein the bottom surface of the bottom support bucket 3 of the cyclone separator is inclined upward; the steam drum also comprises a water distribution device 1, a trapezoidal corrugated plate separator 4, a cleaning orifice plate 5, a porous plate 7 and a top corrugated plate separator 6, wherein the trapezoidal corrugated plate separator 4 is installed on the top of the large-diameter cyclone separator 2 to replace the straight-cylinder corrugated plate separator, wherein the outer wall of the trapezoidal corrugated plate separator 4 is a trapezoidal cylinder, wherein the small opening of the trapezoidal corrugated plate separator 4 faces upward and the large opening faces downward Setting: the cleaning orifice plate 5 is installed on the inner wall of the pressure vessel cylinder 19 above the trapezoidal corrugated plate separator 4, the water supply distribution device 1 is installed on the inner wall of the pressure vessel cylinder 19 above the cleaning orifice plate 5, the water supply distribution device 1 is used to distribute water to the cleaning orifice plate 5, the top corrugated plate separator 6 and the porous plate 7 are fixed on the inner wall of the pressure vessel cylinder 19 above the water supply distribution device 1 in sequence from near to far, the cleaning orifice plate 5, the top corrugated plate separator 6 and the porous plate 7 are all distributed along the length direction of the sealed cavity in the pressure vessel cylinder 19; the cleaning orifice plate 5 is provided with overflow gates around it to prevent water from flowing sideways.

[0018] The bottom surface of the bottom support bucket 3 of the cyclone separator is tilted upwards so that the water flowing out of the bottom of the large-diameter cyclone separator 2 can be buffered by the upwardly tilted bottom surface of the bottom support bucket 3 of the cyclone separator. The water flows down along the upwardly tilted bottom surface, which can reduce the shaking of the equipment caused by the impact of the water flow to the greatest extent, ensure the stability of the structure, and the accuracy of the liquid level monitoring inside the equipment; the main function of the trapezoidal corrugated plate separator 4 is to evenly distribute the steam, eliminate the rotation of the steam flow and further separate the water. The outer wall of the trapezoidal corrugated plate separator 4 is a trapezoidal cylinder, which can It is further ensured that after the rising water vapor contacts the trapezoidal cylinder, it is blocked by the trapezoidal cylinder and then condenses and flows down along its inner wall, thereby increasing the steam processing capacity and achieving a good steam-water separation effect. When the steam passes through the tortuous channel between the corrugated plates in the trapezoidal corrugated plate separator 4, the flow direction is frequently changed. Due to the effect of inertia, the moisture contained in the steam hits the corrugated plates and forms a continuous water film. The water film flows vertically downward, passes through the upwardly inclined bottom surface of the bottom bucket 3 of the cyclone separator and returns to the water chamber, while the steam flows out from the upper part of the trapezoidal corrugated plate separator 4. The separated steam continues to flow upward through the cleaning orifice plate 5 for steam cleaning. The water distribution device 1 not only distributes the water according to the predetermined parts and mixes it with the boiler water to organize the reasonable water working conditions in the boiler, but also is used to distribute water to the cleaning orifice plate 5 to ensure that there is a continuous cleaning water layer on the cleaning orifice plate 5. The overflow gate around the cleaning orifice plate 5 can ensure that the cleaning water layer does not flow sideways. The main function of the cleaning orifice plate 5 is to allow the steam to pass through a relatively clean water layer or water mist to use the difference in concentration between the feed water and the boiler water to reduce the salt dissolved in the steam and prevent the salt content in the steam from being too high; the steam passing through the cleaning orifice plate 5 is equivalent to the third steam-water separation process compared to the existing steam drum in the background technology. The cleaned steam continues to flow upward in the top corrugated plate separator 6 to carry out the fourth steam-water separation process. The main function of the top corrugated plate separator 6 is to separate the steam by using the corrugated track of the corrugated plate. When the steam passes through the tortuous channel between the corrugated plates, the flow direction is frequently changed. Due to the inertia, the water contained in the steam hits the corrugated plate and forms a continuous water film. The water film flows vertically downward and returns to the water chamber, while the steam flows out from the upper part of the top corrugated plate separator 6. The separated steam continues to flow upward in the porous plate 7 to carry out the fifth steam-water separation. When the steam passes through the porous plate 7, the throttling effect of the porous plate 7 makes the steam evenly distributed along the length and width of the drum, preventing the local concentration of the steam and reducing the rising speed of the steam, which is conducive to gravity separation. The separated steam continues to flow upward, after being blocked by the baffle 8, it finally enters the pipeline through the steam outlet and is transported by the pipeline to the downstream production steam place.

[0019] Furthermore, as a specific embodiment of the steam drum of a water-cooled wall directly connected waste boiler full heat recovery gasifier described in the present invention, the large diameter of the trapezoidal corrugated plate separator 4 is larger than the top diameter of the large diameter cyclone separator 2, and the small diameter of the trapezoidal corrugated plate separator 4 is smaller than or equal to the top diameter of the large diameter cyclone separator 2. In this way, while ensuring the steam processing capacity of the trapezoidal corrugated plate separator 4 per unit time, it can also ensure that all the steam flowing out of the large diameter cyclone separator 2 is processed by the trapezoidal corrugated plate separator 4 and then flows out.

[0020] Furthermore, as a specific embodiment of the steam drum for a water-cooled wall directly connected waste boiler full heat recovery gasifier according to the present invention, the cleaning orifice plate (5) and the porous plate (7) are both plate-like structures densely covered with through holes, specifically as follows Figure 3 and Figure 4 As shown, the pore diameters of the cleaning orifice plate 5 and the porous plate 7 are 5-7 mm.

[0021] Furthermore, as a specific embodiment of the steam drum of a water-cooled wall directly connected waste boiler full heat recovery gasifier described in the present invention, the cleaning orifice plate 5, the top corrugated plate separator 6 and the porous plate 7 are all connected to the inner wall of the pressure vessel cylinder 19 through a support frame.

[0022] The above specific structures and dimensional data are specific descriptions of the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent deformations or substitutions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A steam drum for a water-cooled wall directly connected waste boiler full heat recovery gasifier, comprising a pressure vessel barrel (19), a large-diameter cyclone separator (2) and a bottom support bucket (3) of the cyclone separator, characterized in that: The bottom surface of the bottom support bucket (3) of the cyclone separator is arranged to be inclined upward; the steam drum further comprises a water distribution device (1), a trapezoidal corrugated plate separator (4), a cleaning orifice plate (5), a porous plate (7) and a top corrugated plate separator (6); the trapezoidal corrugated plate separator (4) is installed on the top of the large-diameter cyclone separator (2) to replace the straight-cylinder corrugated plate separator; the outer wall of the trapezoidal corrugated plate separator (4) is a trapezoidal cylinder; the small opening of the trapezoidal corrugated plate separator (4) is arranged to face upward and the large opening to face downward; the cleaning orifice plate (5) is installed on the inner wall of the pressure vessel cylinder (19) above the trapezoidal corrugated plate separator (4); the water distribution device (1) is installed on the inner wall of the pressure vessel cylinder (19) above the cleaning orifice plate (5); the water distribution device (1) is used to supply water to the cleaning orifice plate; (5) water distribution, the top corrugated plate separator (6) and the porous plate (7) are fixed in sequence from near to far on the inner wall of the pressure vessel cylinder (19) above the water supply distribution device (1), the cleaning orifice plate (5), the top corrugated plate separator (6) and the porous plate (7) are all distributed along the length direction of the sealed cavity in the pressure vessel cylinder (19); the cleaning orifice plate (5) is provided with overflow thresholds around to prevent water from flowing sideways; the large opening diameter of the trapezoidal corrugated plate separator (4) is larger than the top opening diameter of the large-diameter cyclone separator (2), and the small opening diameter of the trapezoidal corrugated plate separator (4) is smaller than or equal to the top opening diameter of the large-diameter cyclone separator (2); the cleaning orifice plate (5), the top corrugated plate separator (6) and the porous plate (7) are all connected to the inner wall of the pressure vessel cylinder (19) through a support frame.

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