Degassing device for tube bundle pulp distributor of inclined wire papermaking machine and papermaking equipment

Abstract

The invention discloses a degassing device for a tube bundle pulp distributor of an inclined wire papermaking machine and papermaking equipment, and the degassing device comprises a barrel which is of a hollow barrel-shaped structure; the throat pipe is of a tubular structure and is communicated with the cylinder body, the end, away from the cylinder body, of the throat pipe is of a frustum-shaped structure with the diameter gradually reduced in the direction of the cylinder body, and the end, close to the cylinder body, of the throat pipe is of a frustum-shaped structure with the diameter gradually increased in the direction of the cylinder body; the inlet is communicated with one side, deviating from the cylinder body, of the throat pipe and is used for being communicated with a tube bundle pulp distributor; the exhaust port is formed in the upper part of the barrel; the water outlet is formed in the lower part of the cylinder body and is used for communicating the cylinder body with a white water tank of the slushing pump; and the bubble filtering assembly is arranged in the cylinder body and located above the throat pipe, and the bubble filtering assembly is used for breaking bubbles separated from the gas-liquid mixture. According to the degassing device for the tube bundle pulp distributor of the inclined wire papermaking machine and the papermaking equipment, bubbles in a gas-liquid mixture can be removed, and multiple performance indexes of liquid are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of degassing assembly structure, and more specifically, to a degassing device for a tube bundle distributor of an inclined wire papermaking machine. In addition, the present invention also relates to a papermaking equipment comprising the above-mentioned degassing device for a tube bundle distributor of an inclined wire papermaking machine. Background Art

[0002] In the process of papermaking filter materials on the inclined mesh papermaking machine in the papermaking industry, if air or bubbles are entrained in the fluid slurry system on the mesh, it will cause paper defects on the formed filter paper, such as pinholes, holes, translucent spots and other paper defects on the paper surface, affecting the appearance and strength of the paper, especially affecting the filtering performance indicators of the filter material, such as the uniform distribution of air permeability and pore size, and even affecting the filtration efficiency and dirt holding capacity.

[0003] At present, in the pulp system of the tube bundle distributor of the inclined wire paper machine, a venting valve is generally installed on the top of the tube bundle distributor. When a certain amount of air is accumulated in the space at the top of the distributor, it is manually vented at a certain interval. The disadvantage is that the valve needs to be opened and closed frequently, which increases the work intensity, and a large number of bubbles still remain in the flowing pulp, which cannot effectively remove the air and bubbles in the pulp.

[0004] In summary, how to effectively remove air and bubbles in the slurry is a problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a degassing device for a tube bundle distributor of an inclined wire papermaking machine, which can effectively remove air and bubbles in the pulp.

[0006] Another object of the present invention is to provide a papermaking apparatus comprising the above-mentioned degassing device.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A degassing device for a tube bundle pulp distributor of an inclined wire papermaking machine, comprising:

[0009] The cylinder is a hollow cylindrical structure;

[0010] The throat is a tubular structure and is connected to the cylinder. The end of the throat away from the cylinder is a frustum-shaped structure with a gradually decreasing diameter toward the cylinder, and the end of the throat close to the cylinder is a frustum-shaped structure with a gradually increasing diameter toward the cylinder.

[0011] an inlet, which is in communication with a side of the throat away from the cylinder, the inlet being used to communicate with a tube bundle slurry distributor, the tube bundle slurry distributor being used to introduce a gas-liquid mixture into the cylinder;

[0012] An exhaust port is provided at the upper part of the cylinder and is used to achieve communication between the cylinder and an external white water tank;

[0013] A drain port is provided at the lower part of the cylinder and is used to achieve communication between the cylinder and the white water pool of the slurry pump;

[0014] The bubble filter assembly is arranged inside the cylinder and above the throat, and the bubble filter assembly is used to destroy the separated bubbles in the gas-liquid mixture.

[0015] Preferably, the length of the end of the throat away from the cylinder is greater than the length of the end of the throat close to the cylinder, and the ratio of the two lengths ranges from 2 to 2.5.

[0016] Preferably, an extension tube communicating with the interior is provided on the side of the cylinder, the central axis of the extension tube is perpendicular to the central axis of the cylinder, and the extension tube is tangent to the inner wall of the cylinder.

[0017] Preferably, the lower part of the cylinder is connected to the lower cylinder, the lower cylinder is a truncated cone structure and the cross-sectional size of the lower cylinder gradually decreases from top to bottom, and the drain port is arranged on a side of the lower cylinder away from the cylinder.

[0018] Preferably, the bubble filter assembly includes a lower cone, which is a conical surface. The cross-sectional size of the lower cone gradually decreases from bottom to top. A plurality of strip holes are evenly distributed on the lower cone, and the opening direction of the strip holes points along the circumference to the center of the circle.

[0019] Preferably, the bubble filter assembly also includes an upper cone, which is a conical surface. The cross-sectional size of the upper cone gradually increases from bottom to top. A plurality of circular holes are evenly distributed on the upper cone, and the axis of the circular holes forms an angle of 30° with the surface of the upper cone.

[0020] Preferably, an upper cover is provided at the upper end of the cylinder, the upper cover is a truncated cone structure and the cross-sectional size of the upper cover gradually decreases from bottom to top, the upper end of the upper cover is connected to the exhaust port, and the exhaust port is used to connect with the external white water tank.

[0021] Preferably, the exhaust port is provided with a regulating valve, and the regulating valve is used to adjust the opening of the exhaust port.

[0022] Preferably, a window and a mirror are provided on the outer periphery of the cylinder, the window and the mirror are detachably connected, and the mirror is a transparent component.

[0023] A papermaking equipment comprises a degassing device for a tube bundle distributor of an inclined wire papermaking machine, wherein the degassing device for a tube bundle distributor of an inclined wire papermaking machine is any of the above-mentioned degassing devices for a tube bundle distributor of an inclined wire papermaking machine.

[0024] The present invention provides a degassing device for a tube bundle pulper of an inclined wire papermaking machine, wherein the cylinder body of the degassing device is a hollow cylindrical structure, the cylinder body is connected to the tube bundle pulper through a throat, and the tube bundle pulper passes a gas-liquid mixture into the cylinder body through the throat and an inlet, when the gas-liquid mixture enters the throat from the inlet, the gas-liquid mixture is first compressed, and then the pressure is rapidly reduced after passing through the smallest part of the throat size, so that most of the bubbles escape from the gas-liquid mixture, and the gas-liquid mixture performs centrifugal motion after entering the cylinder body, and due to the different specific gravities of the liquid and the bubbles, under the action of the centrifugal force, the bubbles with lighter specific gravity, especially the tiny bubbles, are released from the gas-liquid mixture here, forming a secondary separation, and the separated bubbles rise in the cylinder body under the suction effect of the negative pressure of the white water tank outside the machine, the rising bubbles are destroyed by the bubble filtering component, the separated gas is discharged from the exhaust port, and is sucked into the white tank outside the machine, the separated liquid is discharged from the drain port, and falls into the white water pool of the pulping pump by its own weight, the bubble content in the liquid is greatly reduced, and the quality of the produced paper is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the degassing device of the tube bundle pulp distributor of the inclined wire paper machine provided by the present invention;

[0027] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0028] Figure 3 A schematic diagram of the local structure of the upper cone provided by the present invention;

[0029] Figure 4 The present invention provides Figure 1 Schematic diagram of the structure of the middle C part.

[0030] Reference numerals:

[0031] 1-inlet; 2-throat; 3-cylinder; 4-lower cone; 5-upper cone; 6-upper cover; 7-exhaust port; 8-regulating valve; 9-lower cylinder; 10-drainage port; 11-strip hole; 12-circular hole; 13-window; 14-viewing mirror; 102-tube bundle slurry distributor; 103-external white water tank; 104-white water pool of slurry pump. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The core of the present invention is to provide a degassing device for a tube bundle pulp distributor of an inclined wire papermaking machine, which can effectively remove air and bubbles in the pulp.

[0034] Another core of the present invention is to provide a papermaking equipment including the above-mentioned degassing device.

[0035] The present application provides a degassing device for a tube bundle pulp distributor of an inclined wire paper machine, comprising: an inlet 1, a throat 2, a cylinder 3, an exhaust port 7, a drain port 10 and a bubble filter assembly;

[0036] Wherein, the cylinder 3 is a hollow cylindrical structure;

[0037] The throat pipe 2 is a tubular structure and is connected to the cylinder 3. The end of the throat pipe 2 away from the cylinder 3 is a frustum-shaped structure with a gradually decreasing diameter toward the cylinder 3, and the end of the throat pipe 2 close to the cylinder 3 is a frustum-shaped structure with a gradually increasing diameter toward the cylinder 3.

[0038] The inlet 1 is connected to the side of the throat 2 away from the cylinder 3, and the inlet 1 is used to communicate with the tube bundle slurry distributor 102, and the tube bundle slurry distributor 102 is used to introduce the gas-liquid mixture into the cylinder 3;

[0039] The exhaust port 7 is provided at the upper part of the cylinder 3 and is used to realize the communication between the cylinder 3 and the external white water tank 103;

[0040] The drain port 10 is provided at the lower part of the cylinder 3 and is used to realize the communication between the cylinder 3 and the white water pool 104 of the slurry pump;

[0041] The bubble filter assembly is arranged inside the cylinder 3 and located above the throat 2. The bubble filter assembly is used to destroy the separated bubbles in the gas-liquid mixture.

[0042] Specifically, as attached Figure 1As shown, the side of the cylinder 3 is provided with an inlet 1 and a throat 2, the inlet 1 is connected with the throat 2, the throat 2 is connected with the cylinder 3, the tube bundle slurry distributor 102 is connected with the cylinder 3 through the inlet 1 and the throat 2, the tube bundle slurry distributor 102 is used to introduce a gas-liquid mixture into the cylinder 3, the throat 2 is a tubular structure with a small size in the middle and large sizes at both ends, the gas-liquid mixture is suppressed when entering the reduced diameter section of the throat 2, and the pressure is quickly reduced after the expanded diameter section, so that most of the bubbles escape from the gas-liquid mixture, forming the first separation, and the gas-liquid mixture entering the cylinder 3 performs centrifugal motion along the cylinder 3. Due to the different specific gravities of the bubbles and the liquid, under the action of the centrifugal force, the lighter specific gravity Bubbles, especially tiny bubbles, are released from the gas-liquid mixture again to form a second separation. The separated bubbles rise in the cylinder 3 under the suction effect of the negative pressure of the white water tank 103 outside the machine. The bubbles are destroyed by the bubble filter assembly after passing through the bubble filter assembly. The separated gas is discharged from the exhaust port 7 and discharged into the white water tank 103 outside the machine. The separated liquid is discharged from the drain port 10 and falls into the white water pool 104 of the pulping pump by its own weight. The degassing device can be easily installed in the production process flow where the degassing device is not used, with low capital investment and low operating cost. It can greatly reduce the bubble content in the treated liquid and improve the quality of the produced paper.

[0043] It should be noted that the tube bundle pulp distributor 102, the external white water tank 103 and the flushing pump white water pool 104 in this embodiment are components of the sizing system of the inclined wire paper machine. Their specific structures do not fall within the protection scope of this application. They are mentioned in this scheme for the convenience and clear description of the working principle of the degassing device of the present invention. Other structures can be selected for replacement.

[0044] Based on the above embodiment, the length of the end of the throat 2 away from the cylinder 3 is greater than the length of the end of the throat 2 close to the cylinder 3, and the ratio of the two lengths ranges from 2 to 2.5.

[0045] Specifically, the throat pipe 2 includes a reducing cone and an expanding cone at the entrance end, and the length of the reducing cone section at the water, gas and liquid entrance end is greater than the length of the expanding cone section at the outlet end, so as to achieve the effect of water, gas and liquid being compressed when entering the throat pipe 2 and rapidly decompressed when exiting the throat pipe 2, wherein the optimal value range of the ratio of the length of the reducing cone section to the length of the expanding cone section is 2-2.5.

[0046] In some embodiments, an extension tube communicating with the interior is disposed on the side of the cylinder 3 , the central axis of the extension tube is perpendicular to the central axis of the cylinder 3 , and the extension tube is tangent to the inner wall of the cylinder 3 .

[0047] For details, please refer to the attached Figure 1An extension tube is arranged on the side of the cylinder 3, and the extension tube is arranged tangent to the inner wall of the cylinder 3, so that the gas-liquid mixture entering the cylinder 3 from the throat 2 can perform centrifugal motion. Due to the different specific gravities of water and bubbles, under the action of centrifugal force, the bubbles with light specific gravity, especially the tiny bubbles, are released from the gas-liquid mixture again, which is the second gas-liquid separation.

[0048] In some embodiments, the lower part of the cylinder 3 is connected to the lower cylinder 9, the lower cylinder 9 is a truncated cone structure and the cross-sectional size of the lower cylinder 9 gradually decreases from top to bottom, and the drain outlet 10 is provided on the side of the lower cylinder 9 away from the cylinder 3.

[0049] Specifically, the lower cylinder 9 is an inverted truncated cone structure, which cooperates with the throat pipe 2 so that the gas-liquid mixture passed into the lower cylinder 9 through the throat pipe 2 can form a rotating vortex to improve the escape efficiency of the bubbles. The lower end of the lower cylinder 9 is a drain port 10, which is a tubular structure. The drain port 10 is connected to the white water pool 104 of the grouting pump and is used to pass the liquid after the bubbles are discharged into the white water pool 104 of the grouting pump.

[0050] Based on the above embodiment, the bubble filter assembly includes a lower cone 4, which is a conical surface. The cross-sectional size of the lower cone 4 gradually decreases from bottom to top. A plurality of strip holes 11 are evenly distributed on the lower cone 4, and the opening direction of the strip holes 11 points along the circumference to the center of the circle.

[0051] Specifically, if Figure 2 As shown, the lower cone 4 is arranged directly above the extension tube, and a plurality of strip holes 11 are evenly distributed on the lower cone 4. The bubbles separated from the gas-liquid mixture rise in the cylinder 3 under the suction effect of the negative pressure of the white water tank 103 outside the machine. When the rising bubbles pass through the lower cone 4, the bubbles in a rotating state are blocked by the strip holes 11 and burst due to impact, friction and extrusion.

[0052] Based on the above embodiment, the bubble filter assembly also includes an upper cone 5, which is a conical surface. The cross-sectional size of the upper cone 5 gradually increases from bottom to top. A plurality of circular holes 12 are evenly distributed on the upper cone 5, and the axis of the circular hole 12 forms an angle of 30° with the surface of the upper cone 5.

[0053] For details, please refer to the attached Figure 4 The upper cone 5 is arranged above the lower cone 4, and a plurality of circular holes 12 are evenly distributed on the upper cone 5. The bubbles that are not squeezed and destroyed after passing through the strip holes 11 meet the circular holes 12 of the upper cone 5 during the rising process, and are again blocked, impacted and destroyed by friction. It should be noted that the inner wall of the circular hole 12 is a rough surface, and the axis of the hole forms an angle of 30 degrees with the plane of the upper cone 5 to increase the contact area with the bubbles and increase the friction.

[0054] In some embodiments, an upper cover 6 is provided at the upper end of the cylinder 3. The upper cover 6 is a truncated cone structure and the cross-sectional size of the upper cover 6 gradually decreases from bottom to top. The upper end of the upper cover 6 is connected to the exhaust port 7, and the exhaust port 7 is used to connect with the external white water tank 103.

[0055] Specifically, a table-shaped upper cover 6 is provided at the upper end of the cylinder 3, and the upper cover 6 is connected to the external white water tank 103 through the exhaust port 7. The external white water tank 103 is used to generate negative pressure in the cylinder 3 to ensure that the bubbles are in a rising state.

[0056] On the basis of the above embodiment, the exhaust port 7 is provided with a regulating valve 8 , and the regulating valve 8 is used to adjust the opening of the exhaust port 7 .

[0057] Specifically, the regulating valve 8 is an automatic valve, which adjusts its opening size according to the change of the vacuum degree in the cylinder 3 to stabilize the vacuum degree in the cylinder 3 and maintain the normal working liquid level in the cylinder 3 so that the gas-liquid separation is in a good and stable operating state.

[0058] Optionally, a vacuum detection device may be provided inside the cylinder 3, and the vacuum detection device is connected to a control system, and the control system is also connected to the regulating valve 8, so as to realize automatic regulation of the regulating valve 8 and reduce the workload of operators.

[0059] On the basis of the above-mentioned embodiment, a window 13 and a mirror 14 are provided on the outer periphery of the cylinder 3. The window 13 and the mirror 14 are detachably connected, and the mirror 14 is a transparent component.

[0060] Specifically, a cylindrical window 13 and a mirror 14 connected thereto are fixedly mounted on the cylinder 3. The mirror 14 is a transparent mirror for conveniently observing the liquid level and gas-liquid separation state in the cylinder 3. The mirror 14 is detachably connected to the window 13 for easy disassembly, cleaning and maintenance.

[0061] Optionally, the viewing mirror 14 may be a glass mirror, which is low in cost and easy to maintain.

[0062] In addition to the above-mentioned inclined wire papermaking machine tube bundle pulp distributor degassing device, the present invention also provides a papermaking equipment including the inclined wire papermaking machine tube bundle pulp distributor degassing device disclosed in the above-mentioned embodiment. Please refer to the prior art for the structure of other parts of the papermaking equipment, which will not be repeated in this article.

[0063] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0064] The above is a detailed introduction to the degassing device for the tube bundle distributor of an inclined wire papermaking machine and the papermaking equipment provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A degassing device for a tube bundle distributor of an inclined wire paper machine, characterized in that: include: The cylinder (3) is a hollow cylindrical structure; The throat (2) is a tubular structure and is connected to the cylinder (3); the end of the throat (2) away from the cylinder (3) is a frustum-shaped structure with a gradually decreasing diameter in the direction of the cylinder (3); and the end of the throat (2) close to the cylinder (3) is a frustum-shaped structure with a gradually increasing diameter in the direction of the cylinder (3); an inlet (1) connected to a side of the throat (2) away from the cylinder (3), the inlet (1) being used to connect to a tube bundle slurry distributor (102), the tube bundle slurry distributor (102) being used to introduce a gas-liquid mixture into the cylinder (3); An exhaust port (7) is provided at the upper portion of the cylinder (3) and is used to achieve communication between the cylinder (3) and an external white water tank (103); A drainage port (10) is provided at the lower part of the cylinder (3) and is used to achieve communication between the cylinder (3) and the white water pool (104) of the slurry pump; A bubble filter assembly is arranged inside the cylinder (3) and located above the throat (2), and the bubble filter assembly is used to destroy separated bubbles in the gas-liquid mixture.

2. The degassing device for the tube bundle distributor of the inclined wire paper machine according to claim 1, characterized in that: The length of the end of the throat (2) away from the cylinder (3) is greater than the length of the end of the throat (2) close to the cylinder (3), and the ratio of the two lengths is in the range of 2-2.

5.

3. The degassing device for the tube bundle distributor of the inclined wire paper machine according to claim 1, characterized in that: An extension tube communicating with the interior is provided on the side of the cylinder (3); the central axis of the extension tube is arranged perpendicular to the central axis of the cylinder (3), and the extension tube is arranged tangentially to the inner wall of the cylinder (3).

4. The degassing device for the tube bundle distributor of the inclined wire paper machine according to claim 1, characterized in that: The lower part of the cylinder (3) is connected to the lower cylinder (9); the lower cylinder (9) is a truncated cone structure and the cross-sectional dimensions of the lower cylinder (9) gradually decrease from top to bottom; the drainage port (10) is arranged on a side of the lower cylinder (9) away from the cylinder (3).

5. The degassing device for the tube bundle distributor of the inclined wire paper machine according to claim 4, characterized in that: The bubble filter assembly comprises a lower cone (4), the lower cone (4) being a conical surface, the cross-sectional dimensions of the lower cone (4) gradually decreasing from bottom to top, a plurality of strip holes (11) being evenly distributed on the lower cone (4), the opening direction of the strip holes (11) pointing along the circumference towards the center of the circle.

6. The degassing device for the tube bundle distributor of the inclined wire paper machine according to claim 5, characterized in that: The bubble filter assembly further comprises an upper cone (5), the upper cone (5) being a conical surface, the cross-sectional size of the upper cone (5) gradually increasing from bottom to top, a plurality of circular holes (12) being evenly distributed on the upper cone (5), and the hole axes of the circular holes (12) forming an angle of 30° with the surface of the upper cone (5).

7. The degassing device for the tube bundle distributor of the inclined wire paper machine according to claim 4, characterized in that: An upper cover (6) is provided at the upper end of the cylinder (3); the upper cover (6) is a truncated cone-shaped structure and the cross-sectional dimensions of the upper cover (6) gradually decrease from bottom to top; the upper end of the upper cover (6) is in communication with the exhaust port (7); and the exhaust port (7) is used to communicate with the external white water tank (103).

8. The degassing device for the tube bundle distributor of the inclined wire paper machine according to claim 7, characterized in that: The exhaust port (7) is provided with a regulating valve (8), and the regulating valve (8) is used to adjust the opening degree of the exhaust port (7).

9. The degassing device for the tube bundle distributor of the inclined wire paper machine according to any one of claims 1 to 8, characterized in that: A viewing window (13) and a viewing mirror (14) are provided on the outer periphery of the cylinder (3); the viewing window (13) and the viewing mirror (14) are detachably connected; and the viewing mirror (14) is a transparent component.

10. A papermaking equipment, comprising a degassing device for a tube bundle distributor of an inclined wire papermaking machine, characterized in that: The degassing device for the tube bundle pulp distributor of an inclined wire papermaking machine is the degassing device for the tube bundle pulp distributor of an inclined wire papermaking machine as described in any one of claims 1 to 9.

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