Washing tower

Abstract

The utility model provides a washing tower. The washing tower comprises a tower body, the tower body is provided with a gas inlet, a gas outlet and a containing cavity communicated with the gas inlet and the gas outlet, the bottom of the containing cavity is provided with washing liquid, and the washing liquid is used for washing synthesis gas; the first tower tray group is accommodated at the upper part of the accommodating cavity, and the first tower tray group and the gas outlet are arranged at an interval; the second tower tray group is arranged below the first tower tray group, and the second tower tray group and the first tower tray group are arranged at an interval; the air guide pipe is arranged in the accommodating cavity and is communicated with the air inlet; at least part of the rising cylinder is contained in the washing liquid, the rising cylinder is arranged on the air guide pipe in a sleeving mode, an annular disc is arranged on the inner wall of the rising cylinder in the circumferential direction, a plurality of open holes are formed in the annular disc, the air outlet end of the air guide pipe is located in the rising cylinder, and the annular disc is located above the air outlet end of the air guide pipe. The utility model solves the problem that the synthesis gas washed by the washing tower in the prior art carries liquid seriously.

Description

TECHNICAL FIELD

[0001] The utility model relates to dry coal powder pressurized gasification technical field, specifically, relate to a washing tower. BACKGROUND

[0002] With the continuous growth of energy demand in China, gasification technology is more and more widely used in the field of coal conversion. Dry coal powder pressurized gasification technology, as a kind of high efficiency and energy saving entrained flow bed gasification technology, has been widely concerned and applied. The raw synthesis gas generated by the gasification reaction needs to be washed by multiple stage venturi scrubber, and is discharged after washing in the washing tower. However, the existing synthesis gas washing tower has the problem of backward system liquid carrying after long time running, which brings certain trouble to the stable operation of the gasification system. The phenomenon of liquid carrying of synthesis gas not only leads to excessive high temperature condensate in the shift device, which exceeds its processing capacity, but also affects the water balance of the gasification system, making the water quality of the system worse, which may eventually lead to the shutdown of the gasifier, affecting the production efficiency and equipment life.

[0003] As can be seen from the above, there is a serious problem of liquid carrying of synthesis gas after washing in the existing washing tower. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a washing tower to solve the problem of serious liquid carrying of synthesis gas after washing in the prior art.

[0005] In order to achieve the above purpose, the utility model provides a washing tower, which comprises: a tower body, the tower body has an air inlet, an air outlet and a containing cavity in communication with the air inlet and the air outlet, a washing liquid is arranged at the bottom of the containing cavity, and the washing liquid is used for washing synthesis gas; a first tray group, the first tray group is accommodated in the upper part of the containing cavity and is arranged in space with the air outlet; a second tray group, the second tray group is arranged below the first tray group and is arranged in space with the first tray group; a gas guide pipe, the gas guide pipe is arranged in the containing cavity and is in communication with the air inlet; a rising cylinder, the rising cylinder is at least partially accommodated in the washing liquid, the rising cylinder is sleeved on the gas guide pipe, the inner wall of the rising cylinder is circumferentially provided with an annular disc, a plurality of holes are formed in the annular disc, and the gas outlet end of the gas guide pipe is located in the rising cylinder and the annular disc is located above the gas outlet end of the gas guide pipe.

[0006] Further, the annular disc is spirally arranged around the axis of the gas guide pipe, and the annular disc is arranged in space with the outer wall of the gas guide pipe.

[0007] Further, the washing tower further comprises a baffle cap, the baffle cap is arranged at the top end of the rising cylinder, and the rising cylinder is at least partially located in the baffle cap.

[0008] Further, the side surface of the baffle cap protrudes from the outer wall of the rising cylinder, and the top end of the baffle cap is spherical.

[0009] Further, the baffle cap is sleeved on the air guide pipe, one end of the baffle cap is connected with the air guide pipe, and the other end of the baffle cap is connected with the rising cylinder.

[0010] Further, the first tray group comprises a plurality of first trays, the plurality of first trays are arranged in an up-down interval, and the projections of the plurality of first trays on a horizontal plane are partially overlapped.

[0011] Further, the second tray group comprises a plurality of second trays, the plurality of second trays are arranged in an up-down interval, and the projections of the plurality of second trays on a horizontal plane are partially overlapped with the projections of the plurality of first trays on the horizontal plane.

[0012] Further, the washing tower further comprises two water supply pipes, one of the two water supply pipes is located between the second tray and the top surface of the tower body, and the other water supply pipe is located between the first tray and the second tray, and is used for supplying water to the second tray and the first tray, respectively.

[0013] Further, the washing tower further comprises two downcomers, the two downcomers are located on two sides of the containing cavity, and the downcomers are arranged below the second tray.

[0014] Further, the washing tower further comprises a demister, and the demister is arranged at the top end of the tower body.

[0015] The technical scheme of the present application discloses a washing tower, which comprises a tower body, a first tray group, a second tray group, an air guide pipe and a rising cylinder, the tower body has an air inlet, an air outlet and a containing cavity which is in communication with the air inlet and the air outlet, the bottom of the containing cavity is provided with a washing liquid, the first tray group is arranged in the upper part of the containing cavity and is arranged in an interval with the air outlet, the second tray group is arranged below the first tray group and is arranged in an interval with the first tray group, the air guide pipe is arranged in the containing cavity and is in communication with the air inlet, the rising cylinder is at least partially arranged in the washing liquid, the rising cylinder is sleeved on the air guide pipe, the inner wall of the rising cylinder is circumferentially provided with an annular disc, a plurality of openings are formed in the annular disc, the air outlet end of the air guide pipe is located in the rising cylinder and the annular disc is located above the air outlet end of the air guide pipe, and when the synthetic gas enters the tower body from the air inlet and is discharged along the air guide pipe, the synthetic gas moves upward and passes through the openings, and then sequentially passes through the second tray group and the first tray group, so that the synthetic gas is subjected to gas-liquid separation twice through the up-down interval arrangement of the first tray group and the second tray group, thereby reducing the liquid content of the washed synthetic gas, solving the problem of serious liquid carrying of the washed synthetic gas in the prior art, and increasing the flow rate of the synthetic gas when passing through the openings, so that the high-speed synthetic gas collides with the washing liquid to improve the washing effect of the synthetic gas. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification provide further understanding of the application, serve as a basis for interpreting the application, and do not constitute undue limitations on the application. In the drawings:

[0017] Figure 1 A structure schematic diagram of a washing tower in one specific embodiment of the application is shown; and

[0018] Figure 2 A sectional view of the rising cylinder in one specific embodiment of the application is shown.

[0019] Among them, the above drawings include the following reference signs:

[0020] 10, tower body; 11, air inlet; 12, containing cavity; 20, first tray group; 21, first tray; 30, second tray group; 31, second tray; 40, gas guide pipe; 50, rising cylinder; 60, annular disc; 61, opening; 70, baffle cap; 80, water supply pipe; 90, downcomer; 100, demister. DETAILED DESCRIPTION

[0021] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0023] In the present application, unless otherwise stated, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0024] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0025] In order to solve the problem of serious liquid entrainment of synthesis gas after washing in the prior art, the present application provides a washing tower.

[0026] As Figures 1 to 2As shown, the scrubbing tower includes a tower body 10, a first tray assembly 20, a second tray assembly 30, an air duct 40, and an ascending column 50. The tower body 10 has an air inlet 11, an air outlet, and a receiving chamber 12 connected to both the air inlet 11 and the air outlet. A scrubbing liquid is provided at the bottom of the receiving chamber 12 for scrubbing the synthesis gas. The first tray assembly 20 is accommodated in the upper portion of the receiving chamber 12 and spaced apart from the air outlet. The second tray assembly 30 is disposed below the first tray assembly 20 and spaced apart from the first tray assembly 20. The air duct 40 is disposed within the receiving chamber 12 and connected to the air inlet 11. The ascending column 50 is at least partially accommodated in the scrubbing liquid. The ascending column 50 is sleeved onto the air duct 40. An annular disk 60 is circumferentially provided on the inner wall of the ascending column 50, and the annular disk 60 is provided with a plurality of openings 61. The outlet end of the air duct 40 is located within the ascending column 50, and the annular disk 60 is located above the outlet end of the air duct 40.

[0027] The rising tube 50 is sleeved on the air duct 40. When the synthesis gas enters the tower body 10 from the air inlet 11 and is discharged along the air duct 40, since the outlet end of the air duct 40 is located below the annular disk 60 and a plurality of openings 61 are provided on the annular disk 60, the synthesis gas will pass through the openings 61 when moving upward, and then pass through the second tower plate group 30 and the first tower plate group 20 in turn. The upper and lower intervals of the first tower plate group 20 and the second tower plate group 30 can be used to perform two gas-liquid separations on the synthesis gas, thereby reducing the liquid content of the synthesis gas after washing. At the same time, the flow rate of the synthesis gas increases when passing through the openings 61, and the collision of the high-speed synthesis gas with the washing liquid can improve the washing effect of the synthesis gas.

[0028] In this embodiment, the annular disk 60 is spirally disposed around the axis of the air duct 40 , and the annular disk 60 is spaced apart from the outer wall of the air duct 40 .

[0029] Specifically, the air duct 40 is a curved pipe section, the rising tube 50 is arranged at the end of the air duct 40, and the annular disk 60 is wrapped around the outside of the air duct 40 and is spaced apart from the air duct 40. The spirally arranged annular disk 60 can increase the flow rate of the synthesis gas. When the synthesis gas passes through the annular disk 60, a part of the synthesis gas first passes through the opening 61 on a "spiral section", and the remaining synthesis gas flows out from the opening 61 of another "spiral section", thereby avoiding the accumulation of synthesis gas in the rising tube 50.

[0030] In this embodiment, if Figure 2 As shown, the annular disk 60 is spaced apart from the air duct 40. When the amount of synthesis gas entering the tower body 10 along the air inlet 11 is large, part of the synthesis gas can flow out along the gap between the annular disk 60 and the air duct 40 instead of passing through the opening 61, so as to prevent the synthesis gas from accumulating in the riser 50 or flowing downward out of the riser 50.

[0031] like Figure 1As shown, the washing tower further comprises a baffle cap 70, which is arranged at the top end of the riser 50 and at least partially located in the baffle cap 70.

[0032] Specifically, the baffle cap 70 is arranged at the top end of the riser 50, and the synthetic gas flows along the inner wall of the baffle cap 70 when moving upward and finally flows out along the edge of the baffle cap 70, thereby reducing the flow rate of the synthetic gas and avoiding the synthetic gas from carrying the washing liquid upward to the second tray group 30 during the upward movement.

[0033] In this embodiment, the side of the baffle cap 70 protrudes from the outer wall of the riser 50, and the top end of the baffle cap 70 is spherical.

[0034] Specifically, the baffle cap 70 and the riser 50 form a mushroom-like structure, and the spherical top end of the baffle cap 70 can withstand a greater degree of impact of the synthetic gas, and the spherical top end makes the inner wall of the baffle cap 70 a bowl-shaped structure to change the flow path of the synthetic gas.

[0035] In this embodiment, the baffle cap 70 is sleeved on the gas guide pipe 40, one end of the baffle cap 70 is connected with the gas guide pipe 40, and the other end of the baffle cap 70 is connected with the riser 50.

[0036] Specifically, the baffle cap 70 is welded with the gas guide pipe 40, and the top end of the riser 50 is welded with the inner wall of the baffle cap 70 to form a shape, the riser 50 is connected with the gas guide pipe 40 through the baffle cap 70, both ends of the riser 50 are provided with openings, the riser 50 is immersed in the washing liquid, and the edge of the baffle cap 70 is arranged in a spaced manner with the liquid level of the washing liquid. Optionally, the riser 50 is made of a corrosion-resistant material, such as an alloy plate, to improve the service life of the riser.

[0037] As shown in the figure, Figure 1 The first tray group 20 comprises a plurality of first trays 21, which are arranged in a spaced manner, and the projections of the plurality of first trays 21 on the horizontal plane partially overlap.

[0038] Specifically, the first tray 21 is three, which are arranged in a spaced manner, one of which is connected with one side of the tower body 10, and the other two are connected with the other side of the tower body 10. By arranging the three first trays 21 in a staggered manner, the top of the tower body 10 is shielded, so that when the synthetic gas moves upward, the synthetic gas flowing out from any position will pass through at least one first tray 21, thereby improving the gas-liquid separation effect.

[0039] As shown in the figure, Figure 1 The second tray group 30 comprises a plurality of second trays 31, which are arranged in a spaced manner, and the projections of the plurality of second trays 31 on the horizontal plane partially overlap with the plurality of first trays 21.

[0040] Specifically, a group of the plurality of second trays 31 is arranged in the same plane, the group of the plurality of second trays 31 is arranged at intervals, and the group of the plurality of second trays 31 is two, two second trays 31 are respectively in abutment with two sides of the tower body 10, and the axes of the remaining second trays 31 coincide with the axis of the tower body 10, that is, the projection of the plurality of second trays 31 on the horizontal plane is the same as the cross section of the tower body 10, and the synthesis gas passing through the second tray group 30 will pass through at least one second tray 31. In this way, when the synthesis gas passes through the second tray group 30 and the first tray group 20, it will pass through at least one second tray 31 and one first tray 21, thereby increasing the number of times of gas-liquid separation of the synthesis gas, and achieving the effect of reducing the liquid content of the synthesis gas.

[0041] In the embodiment, the first tray 21 is a bubble cap tray, and the second tray 31 is a fixed valve tray, and the plurality of different trays are combined to realize the multiple gas-liquid separation of the synthesis gas. In the embodiment, the first tray group 20 is arranged above the second tray group 30, and of course, other tray types and combinations of trays can also be used, for example, a plurality of first trays 21 and a plurality of second trays 31 are arranged alternately, and the specific arrangement can be adjusted according to actual needs.

[0042] As shown in FIG. 1, Figure 1 The scrubbing tower further includes two water supply pipes 80, one of the two water supply pipes 80 is located between the second tray 31 and the top surface of the tower body 10, and the other water supply pipe 80 is located between the first tray 21 and the second tray 31, and is respectively used for supplying water to the second tray 31 and the first tray 21.

[0043] Specifically, the two water supply pipes 80 are used to supplement clean medium to the first tray group 20 and the second tray group 30, so as to avoid that the medium on the first tray group 20 and the second tray group 30 has too many particles, which causes the subsequent synthesis gas to have too many particles.

[0044] In the embodiment, one of the two water supply pipes 80 is located above the first tray group 20, and the other is located above the second tray group 30. Optionally, the water outlet end of the water supply pipe 80 is provided with a flow baffle to prevent the water in the water supply pipe 80 from being sprayed beyond the first tray group 20 or the second tray group 30.

[0045] In the embodiment, the first tray 21 and the second tray 31 are both provided with a downcomer plate, the liquid level in the tray is controlled through the downcomer plate, the height of the first tray 21 located at the lowest position in the vertical direction among the plurality of first trays 21 is 850 mm at most, and the height of the second tray 31 located at the lowest position in the vertical direction among the plurality of second trays 31 is 750 mm at most.

[0046] As shown in FIG. 1, Figure 1As shown, the washing tower further comprises downcomers 90, two downcomers 90 are respectively located at two sides of the containing cavity 12, and the downcomers 90 are arranged below the second trays 31.

[0047] Specifically, the downcomers 90 are two, and the two downcomers 90 are respectively located at two sides of the bottom end of the lowermost second tray 31 in the second tray group 30, so as to guide the washing liquid separated by the tray group to the lower side. The length of the downcomers 90 can be increased to improve the guiding effect. The two downcomers 90 are located at two sides of the rising cylinder 50 and are arranged at intervals, so that the guided washing liquid can be prevented from being re-conducted to the tray group by the rising synthesis gas, that is, the gas channeling in the downcomers 90 can be prevented from affecting the normal downflow of the washing water in the tray.

[0048] As shown, Figure 1 The washing tower further comprises a demister 100, which is arranged at the top end of the tower body 10.

[0049] Specifically, the demister 100 is arranged at the front side of the gas outlet of the tower body 10, so as to perform gas-liquid separation on the synthesis gas discharged from the tower body 10. That is, after the synthesis gas enters the tower body 10 and is washed by the washing liquid, the synthesis gas is subjected to multiple gas-liquid separation at the multiple second trays 31, the multiple first trays 21 and the demister 100. The liquid content of the synthesis gas after multiple gas-liquid separation is greatly reduced, the separation and demisting efficiency of the washing tower is improved, and the liquid-carrying condition of the synthesis gas out of the washing tower is greatly reduced. Optionally, the demister 100 is a high-efficiency demister.

[0050] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: through setting the washing tower including tower body 10, first tray group 20, second tray group 30, gas guide pipe 40 and ascending cylinder 50, tower body 10 has air inlet 11, air outlet and with air inlet 11 and air outlet all intercommunication containing cavity 12, the bottom of containing cavity 12 is provided with washing liquid, washing liquid is used to wash synthesis gas, first tray group 20 is housed in the upper portion of containing cavity 12 and is spaced apart from air outlet, second tray group 30 is set below first tray group 20, and is spaced apart from first tray group 20, gas guide pipe 40 is set in containing cavity 12 and is communicated with air inlet 11, ascending cylinder 50 is housed at least partially in washing liquid, ascending cylinder 50 is sleeved on gas guide pipe 40, the inner wall of ascending cylinder 50 is circumferentially provided with annular disc 60, a plurality of apertures 61 are formed in annular disc 60, the air outlet end of gas guide pipe 40 is located in ascending cylinder 50 and annular disc 60 is located above the air outlet end of gas guide pipe 40, through ascending cylinder 50 being sleeved on gas guide pipe 40, when synthesis gas enters tower body 10 from air inlet 11 and is discharged along gas guide pipe 40, since the air outlet end of gas guide pipe 40 is located below annular disc 60 and a plurality of apertures 61 are formed in annular disc 60, so that synthesis gas will pass through aperture 61 when moving upwards, then sequentially passes through second tray group 30 and first tray group 20, through the up-down spaced arrangement of first tray group 20 and second tray group 30, the liquid content of synthesis gas after washing can be reduced by twice gas-liquid separation, at the same time, the flow rate of synthesis gas increases when passing through aperture 61, and the washing effect of synthesis gas can be improved by high-speed synthesis gas colliding with washing liquid.

[0051] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0052] It should be noted that the terms "upper," "lower," and the like in the specification and the claims and the above-described drawings are used to distinguish similar objects and are not necessarily used to describe a particular sequential or chronological order. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein.

[0053] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A washing tower, characterized in that: include: A tower body (10), the tower body (10) having an air inlet (11), an air outlet, and a receiving cavity (12) in communication with the air inlet (11) and the air outlet, a washing liquid being provided at the bottom of the receiving cavity (12), the washing liquid being used for washing the synthesis gas; a first tray group (20), the first tray group (20) being accommodated in the upper portion of the accommodating chamber (12) and spaced apart from the gas outlet; a second tray group (30), the second tray group (30) being arranged below the first tray group (20) and spaced apart from the first tray group (20); an air guide tube (40), the air guide tube (40) being disposed in the accommodating cavity (12) and communicating with the air inlet (11); A rising cylinder (50), wherein the rising cylinder (50) is at least partially accommodated in the washing liquid, the rising cylinder (50) is sleeved on the air duct (40), an annular disk (60) is circumferentially provided on the inner wall of the rising cylinder (50), a plurality of openings (61) are provided on the annular disk (60), the air outlet end of the air duct (40) is located in the rising cylinder (50) and the annular disk (60) is located above the air outlet end of the air duct (40).

2. The washing tower according to claim 1, characterized in that The annular disk (60) is spirally arranged around the axis of the air guide tube (40), and the annular disk (60) is spaced apart from the outer wall of the air guide tube (40).

3. The washing tower according to claim 1, characterized in that The washing tower further comprises a deflector cap (70), which is arranged at the top end of the rising tube (50), and the rising tube (50) is at least partially located in the deflector cap (70).

4. The washing tower according to claim 3, characterized in that The side surface of the deflector cap (70) protrudes from the outer wall of the rising cylinder (50), and the top end of the deflector cap (70) is spherical.

5. The washing tower according to claim 3, characterized in that The deflector cap (70) is sleeved on the air guide pipe (40), one end of the deflector cap (70) is connected to the air guide pipe (40), and the other end of the deflector cap (70) is connected to the rising tube (50).

6. The washing tower according to claim 1, characterized in that The first tray group (20) comprises a plurality of first trays (21), the plurality of first trays (21) are spaced apart from each other, and the projections of the plurality of first trays (21) on a horizontal plane partially overlap.

7. The washing tower according to claim 6, characterized in that The second tray group (30) comprises a plurality of second trays (31), the plurality of second trays (31) are spaced apart from each other, and projections of the plurality of second trays (31) on a horizontal plane partially overlap with the plurality of first trays (21).

8. The washing tower according to claim 7, characterized in that The washing tower further comprises two water supply pipes (80), one of the two water supply pipes (80) being located between the second tower tray (31) and the top surface of the tower body (10), and the other water supply pipe (80) being located between the first tower tray (21) and the second tower tray (31), for supplying water to the second tower tray (31) and the first tower tray (21), respectively.

9. The washing tower according to claim 8, characterized in that The washing tower further comprises a downcomer (90), wherein there are two downcomers (90), the two downcomers (90) being respectively located on both sides of the accommodating chamber (12), and the downcomers (90) being arranged below the second tower tray (31).

10. The washing tower according to any one of claims 1 to 9, characterized in that The washing tower further comprises a demister (100), and the demister (100) is arranged at the top of the tower body (10).

Images