A bleaching device for bleaching pulp using white water from a paper machine

Abstract

A bleaching device for bleaching pulp using white water from a paper machine. The invention relates to the technical field of papermaking equipment. The roller of the conveyor belt is rotated on the frame through a bearing. A feed hopper is fixedly provided on the right end cross frame of the frame. A feed pipe is fixedly provided on the left end cross frame of the frame. Several spray heads are fixed in parallel on the feed pipe. A scraper is mounted on the conveyor belt. The front end of the scraper is rotated on the frame through a rotating shaft, and the lower side of the scraper is movably supported on the upper surface of the conveyor belt. A support mechanism is mounted on the frame, and the rear end of the scraper is mounted in the support mechanism. By providing a corresponding discharging scraper structure, it is possible to flatten and spread the clumped pulp when bleaching the pulp, thereby facilitating the spraying of white water bleaching agent, thereby realizing the use of white water from the paper machine.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking equipment, and in particular to a bleaching device for bleaching pulp using white water from a paper machine. Background Art

[0002] Paper machine white water is wastewater produced by paper machines and contains a large amount of short fibers and additives. Paper machine white water is produced in large quantities during the papermaking process, and modern papermaking industry usually processes white water in an internal circulation process to achieve the purpose of environmental protection. For the application of white water, using white water to dilute pulp is an effective way to utilize white water. There is a technology for using white water for pulp bleaching, and for this, the design of corresponding equipment is needed. Summary of the Invention

[0003] The purpose of the present invention is to address the defects and shortcomings of the existing technology and provide a bleaching device for bleaching pulp using paper machine white water. By setting a corresponding discharge scraper structure, the bleaching device can flatten and spread the clumped pulp when bleaching the pulp, thereby facilitating the spraying of white water bleaching agent, thereby realizing the use of paper machine white water.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] It includes a frame and a conveyor belt, wherein the roller of the conveyor belt is rotated on the frame through a bearing, a feed hopper is fixedly installed on the right end cross frame of the frame, a feed pipe is fixedly installed on the left end cross frame of the frame, and several spray heads are fixed in parallel on the feed pipe. It also includes:

[0006] The scraper is mounted on the conveyor belt, the front end of the scraper is rotated on the frame through a rotating shaft, and the lower side of the scraper is movably mounted on the upper surface of the conveyor belt;

[0007] The supporting mechanism is mounted on the frame, and the rear end of the scraper is mounted inside the supporting mechanism.

[0008] Preferably, the support mechanism comprises:

[0009] A guide rod, wherein the guide rod is fixedly arranged on the rear end frame of the frame;

[0010] A stepping seat, wherein the stepping seat is movably mounted on the guide rod;

[0011] A rotating platform, wherein the rotating platform is rotatably mounted on the stepping seat via a rotating shaft;

[0012] The support rollers are provided in two groups, the left and right, and the support rollers are rotated on the rotating platform through bearings, and the rear end of the scraper is clamped between the left and right groups of support rollers.

[0013] Preferably, a support plate is fixedly provided on the frame, and the support plate is movably supported on the lower surface of the upper belt surface of the conveyor belt.

[0014] Preferably, a waste hopper is fixedly provided on the stepping seat, the front end of the waste hopper extends between the upper and lower belt surfaces of the conveyor belt, and the upper edge of the front end of the waste hopper is movably supported on the lower surface of the support plate.

[0015] Preferably, a spiral paddle is rotated through a bearing in the waste hopper, a discharge pipe is fixed on one end wall of the waste hopper, the end of the spiral paddle is inserted in the discharge pipe, a driving motor is fixed on the stepping seat, and the output shaft of the driving motor and the shaft at one end of the spiral paddle inserted in the discharge pipe are driven by a bevel gear set.

[0016] Preferably, a plurality of squeezing rollers are arranged on the upper surface of the conveyor belt, and the squeezing rollers are arranged between the scraper and the feeding pipe.

[0017] Preferably, a support rod is fixedly provided on the side wall of the scraper facing the feed pipe, a support sleeve is movably provided on the support rod, a mounting frame is rotatably provided on the support sleeve through a rotating shaft, and the extrusion roller is rotatably provided on the mounting frame through a bearing.

[0018] Preferably, a support frame is fixedly provided on the frame, and the support frame is arranged between the scraper and the squeezing roller, and the cross bar of the mounting frame is movably inserted into the support frame.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This device is equipped with a scraper with an adjustable angle, which is placed on the conveyor belt. When the slurry is transported through the conveyor belt, the slurry is scraped and spread on the conveyor belt, so that the white water mixed with the bleaching agent is evenly sprinkled on the spread slurry.

[0021] 2. This device supports the scraper through a stepping seat with a rotating table, so that the angle of the scraper can be adjusted by adjusting the position of the stepping seat. When adjusting the angle of the scraper, the squeezing roller is driven to move through the mounting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 yes Figure 1 Lower left side view.

[0024] Figure 3 yes Figure 1 Right front side view.

[0025] Figure 4 yes Figure 1Left rear view.

[0026] Figure 5 yes Figure 1 Right rear view.

[0027] Description of reference numerals:

[0028] Frame 1, conveyor belt 2, feed hopper 3, feed pipe 4, scraper 5, support mechanism 6, guide rod 6-1, stepping seat 6-2, rotary table 6-3, support roller 6-4, support plate 7, waste hopper 8, spiral paddle 9, discharge pipe 10, drive motor 11, squeezing roller 12, support rod 13, support sleeve 14, mounting frame 15, support frame 16. DETAILED DESCRIPTION

[0029] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments described are only used as examples. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention. Example

[0030] like Figure 1-5 As shown, this embodiment includes a frame 1 and a conveyor belt 2, wherein the roller of the conveyor belt 2 is rotatably mounted on the frame 1 through a bearing, a feed hopper 3 is fixedly mounted on the right end cross frame of the frame 1, a feed pipe 4 is fixedly mounted on the left end cross frame of the frame 1, and a plurality of spray heads 17 are fixedly mounted in parallel on the feed pipe 4. It also includes:

[0031] The scraper 5 is mounted on the conveyor belt 2. The front end of the scraper 5 is rotated on the frame 1 through a rotating shaft, and the lower side of the scraper 5 is movably mounted on the upper surface of the conveyor belt 2.

[0032] Support mechanism 6, the support mechanism 6 is mounted on the frame 1, and the rear end of the scraper 5 is mounted inside the support mechanism 6;

[0033] The supporting mechanism 6 comprises:

[0034] Guide rod 6-1, said guide rod 6-1 is fixedly arranged on the rear end frame of the frame 1;

[0035] Stepping seat 6-2, said stepping seat 6-2 is movably mounted on the guide rod 6-1;

[0036] The rotating platform 6-3 is rotatably mounted on the stepping seat 6-2 via a rotating shaft;

[0037] Support rollers 6-4 are provided in two groups, the left and right, and the support rollers 6-4 are rotatably mounted on the rotating platform 6-3 through bearings, and the rear end of the scraper 5 is sandwiched between the left and right groups of support rollers 6-4;

[0038] The support plate 7 is fixedly mounted on the frame 1 and is movably mounted on the lower surface of the upper belt surface of the conveyor belt 2;

[0039] The waste hopper 8 is fixedly mounted on the stepping seat 6-2, and the upper side of the front end of the waste hopper 8 is movably mounted on the lower surface of the support plate 7;

[0040] A spiral pick 9, wherein the spiral pick 9 is arranged in the waste hopper 8, and the right end of the spiral pick 9 is screwed on the right inner wall of the waste hopper 8 through a bearing;

[0041] A discharge pipe 10 is fixed to the left side plate of the waste hopper 8, and the left end of the spiral paddle 9 is inserted into the discharge pipe 10;

[0042] The drive motor 11 is fixedly mounted on the stepping seat 6-2, and the output shaft of the drive motor 11 passes through the upper side wall of the discharge pipe 10 and is connected to the left end shaft of the spiral paddle 9 through a bevel gear set;

[0043] A support rod 13, wherein the support rod 13 is fixedly arranged on the left side wall of the scraper 5;

[0044] A support sleeve 14, wherein the support sleeve 14 is movably mounted on the support rod 13;

[0045] A mounting frame 15, wherein the mounting frame 15 is rotatably mounted on the support sleeve 14 via a rotating shaft;

[0046] The squeezing roller 12 is rotatably mounted on the mounting frame 15 via a bearing, and the squeezing roller 12 is movably mounted on the upper surface of the conveyor belt 2;

[0047] The support frame 16 is fixedly arranged on the frame 1 , and the cross bar of the mounting frame 15 is movably inserted into the support frame 16 .

[0048] By adopting the technical solution disclosed in the present invention, it is possible to achieve:

[0049] When using this device, the slurry is introduced into the feeding hopper 3, and the white water mixed with the bleaching agent is introduced into the feeding pipe 4;

[0050] The slurry is fed to the front side of the right end of the upper belt surface of the conveyor belt 2 through the feed hopper 3, and then transported to the left by the conveyor belt 2. When the slurry moves to the scraper 5, the scraper 5 scrapes the slurry and evenly spreads the slurry on the upper belt surface of the conveyor belt 2. The scraper 5 sends the excess slurry when scraping to the waste hopper 8. The spiral paddle 9 is driven by the driving motor 11 to rotate and send the slurry in the waste hopper 8 to the discharge pipe 10 for discharge; the conveyor belt 2 transports the flattened slurry to the left and flattens it through the squeezing roller 12. The slurry passes under the feed pipe 4, and then the feed pipe 4 sprays white water dissolved in bleaching agent through the spray head 17 to bleach the slurry. Finally, the slurry is sent out through the left end of the conveyor belt 2 for subsequent bleaching reaction.

[0051] When adjusting the angle between the scraper 5 and the upper surface of the conveyor belt 2, the stepping seat 6-2 is slid on the guide rod 6-1, and then the stepping seat 6-2 drives the rotating table 6-3 to move, and the rotating table 6-3 drives the rear end of the scraper 5 to move and then drives the scraper 5 to rotate, that is, the angle of the scraper 5 is adjusted. When the angle between the scraper 5 and the upper surface of the conveyor belt 2 increases, the residence time of the slurry on the conveyor belt 2 when scraping the slurry is reduced, that is, the amount of slurry per unit area is reduced, so that the thickness of the slurry becomes thinner after the slurry is squeezed.

[0052] The technical advantages that can be achieved by adopting the above technical solution are as follows:

[0053] 1. This device is provided with a scraper 5 with an adjustable angle, so that the scraper 5 is placed on the conveyor belt 2, so that when the slurry is transported by the conveyor belt 2, the slurry is scraped and spread on the conveyor belt 2, so that the white water mixed with the bleaching agent is evenly sprinkled on the spread slurry;

[0054] 2. This device supports the scraper 5 through a stepping seat 6-2 with a rotating table 6-3, so that the angle of the scraper 5 can be adjusted by adjusting the position of the stepping seat 6-2, and when adjusting the angle of the scraper 5, the squeezing roller 12 is driven to move through the mounting frame 15.

[0055] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bleaching device for bleaching pulp using white water from a paper machine, comprising a frame (1) and a conveyor belt (2), wherein the roller of the conveyor belt (2) is rotatably mounted on the frame (1) via a bearing, a feed hopper (3) is fixedly mounted on the right end cross frame of the frame (1), a feed pipe (4) is fixedly mounted on the left end cross frame of the frame (1), and a plurality of spray heads (17) are fixedly mounted in parallel on the feed pipe (4); characterized in that: It also contains: A scraper (5), wherein the scraper (5) is mounted on the conveyor belt (2), the front end of the scraper (5) is rotated on the frame (1) via a rotating shaft, and the lower side of the scraper (5) is movably mounted on the upper surface of the conveyor belt (2); A support mechanism (6), wherein the support mechanism (6) is mounted on the frame (1), and the rear end of the scraper (5) is mounted inside the support mechanism (6); The supporting mechanism (6) comprises: A guide rod (6-1), wherein the guide rod (6-1) is fixedly arranged on the rear end frame of the frame (1); A stepping seat (6-2), wherein the stepping seat (6-2) is movably mounted on the guide rod (6-1); A rotating platform (6-3), wherein the rotating platform (6-3) is rotatably mounted on the stepping seat (6-2) via a rotating shaft; Support rollers (6-4), the support rollers (6-4) are provided in two groups, the left and right, the support rollers (6-4) are rotatably mounted on the rotating platform (6-3) via bearings, and the rear end of the scraper (5) is sandwiched between the two groups of support rollers (6-4); A support plate (7) is fixedly provided on the frame (1), and the support plate (7) is movably supported on the lower surface of the upper belt surface of the conveyor belt (2); A waste hopper (8) is fixedly provided on the stepping seat (6-2), the front end of the waste hopper (8) is extended between the upper and lower belt surfaces of the conveyor belt (2), and the upper edge of the front end of the waste hopper (8) is movably supported on the lower surface of the support plate (7); A spiral paddle (9) is rotatably mounted in the waste hopper (8) via a bearing, a discharge pipe (10) is fixedly mounted on one end wall of the waste hopper (8), an end of the spiral paddle (9) is inserted into the discharge pipe (10), a driving motor (11) is fixedly mounted on the stepping seat (6-2), and an output shaft of the driving motor (11) and an end shaft of the spiral paddle (9) inserted into the discharge pipe (10) are driven by a bevel gear set; A plurality of squeezing rollers (12) are arranged on the upper surface of the conveyor belt (2), and the squeezing rollers (12) are arranged between the scraper (5) and the feeding pipe (4); A support rod (13) is fixedly provided on a side wall of the scraper (5) facing the feed pipe (4), a support sleeve (14) is movably sleeved on the support rod (13), a mounting frame (15) is rotatably provided on the support sleeve (14) via a rotating shaft, and the squeezing roller (12) is rotatably provided on the mounting frame (15) via a bearing.

2. The bleaching device for bleaching pulp using white water from a paper machine according to claim 1, characterized in that: A support frame (16) is fixedly provided on the frame (1), and the support frame (16) is mounted between the scraper (5) and the squeezing roller (12), and a crossbar of the mounting frame (15) is movably inserted into the support frame (16).

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