Chemico-mechanical pulp filter pressing device

Abstract

The utility model discloses a chemimechanical pulp filter pressing device which comprises a mounting frame and a top plate, a second filter belt is arranged in the mounting frame, a first filter belt, a power roller and a pressing roller are arranged below the top plate, a plurality of filter holes are formed in the second filter belt and the first filter belt, the first filter belt is located above the second filter belt, and the power roller is located above the first filter belt. According to the chemimechanical pulp filter pressing device, chemimechanical pulp is guided by the second filter belt to penetrate through the space between the second filter belt and the first filter belt to be subjected to filter pressing, and filtrate penetrates through the second filter belt, falls onto the flow guide plate and is discharged from the water outlet; the surface of the first filter belt is cleaned by the cleaning roller, and the surface of the second filter belt is cleaned by the high-pressure air sprayed from the exhaust port, so that the second filter belt and the first filter belt can be cleaned in time after being blocked, and the filter pressing efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical mechanical slurry filtration, and in particular to a chemical mechanical slurry filtration device. Background Technology

[0002] Chemimechanical pulp is the name of pulp, an intermediate product in the papermaking process. Papermaking is a complex process consisting of multiple processing steps. The raw materials for making paper are various fibrous materials, such as wood, non-wood (such as rice straw, wheat straw, bagasse, bamboo, cotton stalks, etc.), bast fibers (hemp, mulberry bark, mulberry bark, etc.), waste cotton (or cotton linters), and other fibers. These fibrous raw materials first need to be chopped and cooked to make pulp. Because these fibrous materials have different compositions and chemical components, there are different pulping processes. The main steps of chemimechanical pulping include chemical pretreatment and mechanical descaling.

[0003] Chemimechanical pulp mainly relies on belt filter presses to reduce its moisture content and achieve solid-liquid separation and fiber purification. When using existing belt filter presses, the filter pores in the filter belt are prone to clogging, requiring periodic shutdowns and unclogging. There is a problem that the filter belt cannot be cleaned in time after clogging, resulting in a decrease in the filter belt's filtration capacity and low filtration efficiency.

[0004] To address these issues, a chemical mechanical slurry filter press is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a chemical mechanical slurry filter press to solve the problem mentioned in the background art that the filter belt cannot be cleaned in time after clogging, resulting in a decrease in the filter belt's filtration capacity and low filtration efficiency. The technical solution of this invention provides a solution that is significantly different from the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A chemical mechanical slurry filter press includes a mounting frame and a top plate. A second filter belt is disposed inside the mounting frame. A first filter belt, a power roller, and a pressure roller are disposed below the top plate. Both the second and first filter belts have a plurality of filter holes inside. The first filter belt is located above the second filter belt and is wrapped around the power roller and the pressure roller. The second filter belt is wrapped around a positioning roller, a drive roller, and a guide roller. A feed inlet is disposed on one side of the pressure roller and is located at one end of the second filter belt. The discharge end of the feed inlet faces the surface of the second filter belt.

[0008] Preferably, a scraper is provided on one side of the feed inlet, and the side with the feed inlet on both sides of the pressure roller is the feed position, and the other side of the pressure roller is the discharge position. The chemimechanical slurry enters from the feed position between the second filter belt and the first filter belt, and is then guided by the second filter belt to the discharge position.

[0009] Preferably, a guide plate is provided below the pressure roller, baffles are provided on both sides of the guide plate, a drain outlet is provided on the side of the mounting frame, one end of the guide plate is connected to the mounting frame, and the other end of the guide plate extends downward into the interior of the drain outlet.

[0010] Preferably, a conveyor belt is provided below the second filter belt, a fixed plate is provided above the conveyor belt, the second filter belt passes between the fixed plate and the conveyor belt, a plurality of exhaust ports are provided below the fixed plate, an air inlet is provided at one end of the fixed plate, and the airflow outlet of the exhaust port faces the surface of the second filter belt.

[0011] Preferably, a support plate is provided below the top plate, the lower end of the support plate is fixed inside the mounting frame, the power roller and the pressure roller are installed between the two support plates, a first motor is provided on the side of the mounting frame, the first motor is connected to the transmission roller, a crossbar is provided on one side of the support plate, and a cleaning roller is provided at one end of the crossbar, the cleaning roller is in contact with the surface of the first filter belt.

[0012] Preferably, a driving wheel and a driven wheel are respectively provided on one side of the power roller and the pressure roller, a second motor is provided on one side of the driving wheel, the driving wheel and the driven wheel are connected by a belt, and the second motor is connected to the driving wheel.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, after the chemimechanical slurry falls from the feed inlet onto the second filter belt, the second filter belt guides the chemimechanical slurry through the space between the second and first filter belts for pressure filtration. The filtrate passes through the second filter belt, falls onto the guide plate, and is discharged from the drain outlet. The filter cake is guided by the second filter belt onto the conveyor belt. A cleaning roller cleans the filter cake residue adhering to the surface of the first filter belt, and high-pressure air is sprayed from the exhaust port to blow the filter cake residue stuck in the filter holes of the second filter belt onto the conveyor belt. This ensures that the second and first filter belts can be cleaned in time when they become clogged, thereby improving the pressure filtration efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a chemical mechanical slurry filter press.

[0016] Figure 2 This is a schematic diagram of the structure of the second filter belt in a chemical mechanical slurry filter press.

[0017] Figure 3 This is a schematic diagram of the mounting frame in a chemical mechanical slurry filter press.

[0018] Figure 4 This is a schematic diagram of the structure of the first filter belt in a chemical mechanical slurry filter press.

[0019] In the diagram: 1. Mounting frame; 101. Drain outlet; 102. Feed inlet; 103. Scraper; 104. Conveyor belt; 105. Guide plate; 106. Baffle; 2. Top plate; 201. Support plate; 202. Crossbar; 203. Cleaning roller; 3. First filter belt; 4. Second filter belt; 401. Positioning roller; 402. Drive roller; 4021. First motor; 403. Guide roller; 5. Pressure roller; 501. Driven wheel; 502. Power roller; 503. Drive wheel; 504. Second motor; 505. Belt; 6. Fixing plate; 601. Exhaust outlet; 602. Air inlet. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4In this utility model, a chemical mechanical slurry filter press includes a mounting frame 1 and a top plate 2. A second filter belt 4 is arranged inside the mounting frame 1. A first filter belt 3, a power roller 502, and a pressure roller 5 are arranged below the top plate 2. Both the second filter belt 4 and the first filter belt 3 have a number of filter holes inside. The first filter belt 3 is located above the second filter belt 4 and is wrapped around the power roller 502 and the pressure roller 5. The second filter belt 4 is wrapped around the positioning roller 401, the transmission roller 402, and the guide roller 403. A feed inlet 102 is provided on one side of the pressure roller 5. The feed inlet 102 is located at one end of the second filter belt 4, and the discharge end of the feed inlet 102 faces the surface of the second filter belt 4.

[0024] Example 1: Please refer to Figure 1-4 In this embodiment of the present invention, a chemimechanical slurry filter press device is provided with a scraper 103 on one side of the feed inlet 102. The side of the pressure roller 5 with the feed inlet 102 is the feed position, and the other side of the pressure roller 5 is the discharge position. The chemimechanical slurry enters from the feed position between the second filter belt 4 and the first filter belt 3, and is then guided by the second filter belt 4 to the discharge position. After the chemimechanical slurry falls from the feed inlet 102 onto the second filter belt 4, it is in an accumulated state. The scraper 103 scrapes the chemimechanical slurry flat, thereby improving the subsequent filter press efficiency.

[0025] A guide plate 105 is provided below the pressure roller 5, and baffles 106 are provided on both sides of the guide plate 105. A drain outlet 101 is provided on the side of the mounting frame 1. One end of the guide plate 105 is connected to the mounting frame 1, and the other end of the guide plate 105 extends downward into the interior of the drain outlet 101. The baffle 106 has a trumpet-shaped structure. The baffle 106 guides the filtrate that falls naturally from the chemimechanical pulp at the feed and discharge positions to the guide plate 105.

[0026] A conveyor belt 104 is provided below the second filter belt 4, and a fixing plate 6 is provided above the conveyor belt 104. The second filter belt 4 passes between the fixing plate 6 and the conveyor belt 104. Several exhaust ports 601 are provided below the fixing plate 6, and an air inlet 602 is provided at one end of the fixing plate 6. The airflow outlet of the exhaust port 601 faces the surface of the second filter belt 4, and compressed air enters the interior of the fixing plate 6 from the air inlet 602.

[0027] A support plate 201 is provided below the top plate 2. The lower end of the support plate 201 is fixed inside the mounting frame 1. The power roller 502 and the pressure roller 5 are installed between the two support plates 201. A first motor 4021 is provided on the side of the mounting frame 1. The first motor 4021 is connected to the transmission roller 402. A crossbar 202 is provided on one side of the support plate 201. A cleaning roller 203 is provided at one end of the crossbar 202. The cleaning roller 203 is in contact with the surface of the first filter belt 3.

[0028] When the chemimechanical slurry is on the second filter belt 4, the second filter belt 4 guides the chemimechanical slurry through the space between the second filter belt 4 and the first filter belt 3 for pressure filtration. The filtrate passes through the second filter belt 4 and falls onto the guide plate 105 and is discharged from the drain outlet 101. The filter cake is guided by the second filter belt 4 to the conveyor belt 104. The cleaning roller 203 cleans the filter cake residue attached to the surface of the first filter belt 3. High-pressure air is sprayed from the exhaust port 601 to blow the filter cake residue stuck in the filter holes of the second filter belt 4 onto the conveyor belt 104, thereby ensuring that the second filter belt 4 and the first filter belt 3 can be cleaned in time after clogging, thus improving the pressure filtration efficiency.

[0029] Example 2: Please refer to Figure 1-4 The difference from Embodiment 1 is that: a driving wheel 503 and a driven wheel 501 are respectively provided on one side of the power roller 502 and the pressure roller 5, a second motor 504 is provided on one side of the driving wheel 503, the driving wheel 503 and the driven wheel 501 are connected by a belt 505, and the second motor 504 is connected to the driving wheel 503.

[0030] Two first motors 4021 simultaneously drive two drive rollers 402 to rotate, which in turn drives the second filter belt 4 to rotate. The second motor 504 sequentially drives the power roller 502, the first filter belt 3, and the pressure roller 5 to rotate, so that the second filter belt 4 and the first filter belt 3 rotate simultaneously. This ensures continuous filtration and transportation of the chemimechanical pulp, avoids the accumulation of chemimechanical pulp in a narrow area, and further improves the filtration efficiency.

[0031] The working principle of this utility model is as follows: the second filter belt 4 guides the chemical mechanical slurry through the space between the second filter belt 4 and the first filter belt 3 for pressure filtration. The filtrate passes through the second filter belt 4 and falls onto the guide plate 105 and is discharged from the drain outlet 101. The filter cake is guided by the second filter belt 4 to the conveyor belt 104. The cleaning roller 203 cleans the surface of the first filter belt 3, and high-pressure air is sprayed from the exhaust port 601 to clean the surface of the second filter belt 4. This ensures that the second filter belt 4 and the first filter belt 3 can be cleaned in time after blockage, thereby improving the pressure filtration efficiency.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chemical mechanical slurry filter press, comprising a mounting frame (1) and a top plate (2), characterized in that: The mounting frame (1) is provided with a second filter belt (4) inside. The top plate (2) is provided with a first filter belt (3), a power roller (502) and a pressure roller (5) below it. The second filter belt (4) and the first filter belt (3) are provided with a number of filter holes inside. The first filter belt (3) is located above the second filter belt (4). The first filter belt (3) is wrapped around the power roller (502) and the pressure roller (5). The second filter belt (4) is wrapped around the positioning roller (401), the transmission roller (402) and the guide roller (403). The pressure roller (5) is provided with a feed inlet (102) on one side. The feed inlet (102) is located at one end of the second filter belt (4). The discharge end of the feed inlet (102) faces the surface of the second filter belt (4).

2. The chemical mechanical slurry filter press according to claim 1, characterized in that: A scraper (103) is provided on one side of the feed inlet (102). The side of the pressure roller (5) with the feed inlet (102) is the feed position, and the other side of the pressure roller (5) is the discharge position. The chemimechanical slurry enters between the second filter belt (4) and the first filter belt (3) from the feed position, and is then guided to the discharge position by the second filter belt (4).

3. The chemical mechanical slurry filter press according to claim 1, characterized in that: A guide plate (105) is provided below the pressure roller (5), baffles (106) are provided on both sides of the guide plate (105), and a drain outlet (101) is provided on the side of the mounting frame (1). One end of the guide plate (105) is connected to the mounting frame (1), and the other end of the guide plate (105) extends downward to the interior of the drain outlet (101).

4. The chemical mechanical slurry filter press according to claim 1, characterized in that: A conveyor belt (104) is provided below the second filter belt (4), and a fixing plate (6) is provided above the conveyor belt (104). The second filter belt (4) passes between the fixing plate (6) and the conveyor belt (104). Several exhaust ports (601) are provided below the fixing plate (6). An air inlet (602) is provided at one end of the fixing plate (6), and the airflow outlet of the exhaust port (601) faces the surface of the second filter belt (4).

5. A chemical mechanical slurry filter press according to claim 1, characterized in that: A support plate (201) is provided below the top plate (2). The lower end of the support plate (201) is fixed inside the mounting frame (1). The power roller (502) and the pressure roller (5) are installed between the two support plates (201). A first motor (4021) is provided on the side of the mounting frame (1). The first motor (4021) is connected to the transmission roller (402). A crossbar (202) is provided on one side of the support plate (201). A cleaning roller (203) is provided at one end of the crossbar (202). The cleaning roller (203) is in contact with the surface of the first filter belt (3).

6. A chemical mechanical slurry filter press according to claim 1, characterized in that: The power roller (502) and the pressure roller (5) are respectively provided with a drive wheel (503) and a driven wheel (501) on one side. A second motor (504) is provided on one side of the drive wheel (503). The drive wheel (503) and the driven wheel (501) are connected by a belt (505). The second motor (504) is connected to the drive wheel (503).

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