CN202181477U - a washing machine - Google Patents

Abstract

The utility model discloses a pulp washing machine, which comprises a drum groove, a rotating drum is arranged in the drum groove, a filter screen is arranged on the outer circumference of the rotating drum, a slurry feeding groove is arranged on one side of the drum groove, and a slurry feeding groove is arranged on the other side of the drum groove. One side is provided with a pulp tank, the pulp tank is provided with a stripping device, and a pulp output device is arranged in the pulp tank; a cone cylinder is coaxially installed in the drum, and the cone cylinder A filtrate flow channel is formed between the drum and the drum. One end of the drum is provided with a valve seat drain port communicating with the filtrate flow channel. The design of the cone body increases the cross-sectional area of the valve seat drain port and reduces the filtrate flow. The resistance of the flow channel increases the flow rate of the filtrate, completely solves the phenomenon of filtrate regurgitation, improves the dryness of the slurry, reduces the residual alkali content of the slurry, and improves the alkali recovery rate.

Description

a washing machine

technical field

The utility model relates to a kind of equipment for fully filtering, displacing, washing and concentrating the cooked slurry in the pulping and papermaking industry, in particular to a kind of equipment which realizes the filtering, displacing and concentrating of the diluted slurry through continuous work. A pulp washer for replacing washing and thickening belongs to the technical field of papermaking machinery.

Background technique

At present, the pulp and paper industry mainly adopts cone valve pulp washer and old-fashioned planar valve pulp washer for pulp filtration, displacement washing and concentration equipment.

The cone valve pulp washing machine adopts a cone-shaped distribution valve, which is composed of a valve core, a valve seat, and an end cover. The valve core is 10o conical, with a diameter of 648mm and a length of 2246mm. , It is necessary to reserve 3 meters of installation and maintenance space on the operation side of the pulp washer.

The cooperation between the valve core and the valve body requires a gap of 0.5mm-0.8mm, without friction, the valve body rotates with the drum, and the valve core and valve seat are fixed. There are 40 suction pipes evenly distributed on the valve body, the filtrate flow rate is small, and the valve core is made of carbon steel-lined fiberglass composite structure. During the operation, the fiberglass is easy to fall off and wear due to heat, resulting in unstable vacuum and affecting normal production. The volume of the drum chamber is small, the cylinder body is a straight cylinder, the cross-sectional area of the suction nozzle on the valve body is small, the flow rate of the filtrate is slow, and there is a phenomenon of filtrate regurgitation. The short-tube nozzle of the washing pipe is easily blocked by fine fibers, resulting in poor replacement washing effect.

The volume of the original chamber of the bowl of the old-fashioned planar valve pulp washing machine is small, the cylinder is a straight cylinder, the cross-sectional area of the liquid discharge port on the valve seat is small, the flow rate of the filtrate is slow, and there is a phenomenon of low dryness of the blanking material. The spool of the distribution valve is in the shape of a whole fan-shaped piece, made of carbon steel lined with FRP composite structure, installed as two fulcrum supports, the spool is bulky, and the surface is lined with FRP, which is easy to deform after curing, and FRP is easy to age when heated. Stable, unstable vacuum, thin slurry layer, the gap between the valve core and the valve seat needs to be adjusted frequently, the whole production line must be shut down during adjustment, and the fan-shaped cover on the valve cover of the pulp washer needs to be opened for adjustment during maintenance. The nozzle of the washing pipe is a curved tongue plate structure, which sprays water unevenly and does not form a water curtain, resulting in poor replacement washing effect.

Therefore, the structural characteristics of the cone valve pulp washing machine and the old-fashioned flat valve pulp washing machine determine that the output of these two types of equipment is small, the residual alkali content of the pulp after washing the equipment is high, and the dryness of the pulp after filtration is low. Installation, It is difficult to maintain and cannot adapt to the requirements of the development and expansion of paper mills and the goals of energy saving and emission reduction.

Utility model content

The problem to be solved by the utility model is to overcome the shortcomings of the existing washing and concentration equipment, such as poor washing and concentration effects, low output, high pollutant discharge, difficult installation and maintenance, etc., and provide a method that can not only improve the filtering, replacement washing and concentration effects. Moreover, it is a pulp washing machine with compact structure, convenient installation and use, and simple maintenance.

In order to solve the above problems, the technical solution adopted by the utility model is:

A pulp washing machine, comprising a drum, the drum is provided with a drum, the outer circumference of the drum is provided with a filter screen, one side of the drum is provided with a slurry inlet, and the other side is provided with an outlet A pulp tank, a pulping device is provided on the pulp tank, and a pulp output device is arranged in the pulp tank;

A conical cylinder is installed coaxially inside the drum, a filtrate flow channel is formed between the cone cylinder and the drum, and a valve seat drain port communicating with the filtrate flow channel is provided at one end of the drum.

The design of the cone body increases the cross-sectional area of the valve seat discharge port, reduces the resistance of the filtrate flow channel, increases the flow rate of the filtrate, completely solves the phenomenon of filtrate regurgitation, improves the dryness of the slurry, and reduces the residue of the slurry. Alkali content, increased alkali recovery.

Below is the further improvement of the utility model to above-mentioned scheme:

The two ends of the drum groove are respectively provided with a drum operation side end plate and a drum transmission side end plate, and a distributing valve connected with the valve seat drain port is provided at the center of the drum operation side end plate;

A valve cover is installed on the outside of the distribution valve, a water leg is connected to the valve cover, and a water leg pipe is connected to the other end of the water leg.

The spool of the distribution valve is composed of two fan-shaped pieces, made of phenolic bakelite material, which has the characteristics of heat resistance, high rigidity, and good chemical stability. Each piece is small in size and not easy to deform, and the spool is enlarged The outer circle of the valve core is installed on several brackets, and all the brackets are installed on the static ring of the valve cover, which will not change after being fixed. The valve cover is changed to a split structure and installed on the side plate of the tank body. , for easy maintenance, the valve core divides the entire circumference into two areas: the vacuum area of the uncovered part and the stripping area of the covered part of the valve core. The vacuum area includes the vacuum suction filter area and the washing area corresponding to the washing pipe.

Further improvements:

30-38 first spacers are evenly arranged between the drum and the cone body along the circumferential direction, and the first spacers connect the filtrate flow path between the outer peripheral surface of the cone body and the inner peripheral surface of the drum. It is divided into 30-38 compartments, and each compartment communicates with the drain port of the valve seat through the filtrate flow channel.

Further improvements:

A stainless steel corrugated filter plate for supporting the filter screen is installed in the compartment.

A second spacer and a support plate for supporting the stainless steel corrugated filter plate are arranged between the adjacent first spacers.

Further improvements:

There are partitions corresponding to the first spacer inside the cone cylinder, and the filtrate flow channel formed between the end surface of the cone cylinder and the end plate on the operating side of the drum is located between the adjacent partitions.

Further improvements:

The stripping device is an air scraper, which is arranged above the pulp outlet and close to the drum.

The upper end of the air scraper is equipped with a scraper body blade, and the air scraper has a semicircular structure, which reduces weight, has high strength, reduces welding workload, and the straightness meets the design requirements.

Further improvements:

The slurry output device is a crushing screw conveyor arranged in the slurry outlet below the pulp removal device.

The crushing teeth on the screw shaft blade of the crushing screw conveyor are set every 52.5°, and the number of crushing teeth is doubled to improve the crushing effect. The center line of the screw shaft and the center line of the drum are located on the same horizontal line, which reduces the impact of the slurry on the screw shaft , Protect the bearing and prolong the service life of the bearing.

Further improvements:

There are chemical solution pipes for adding chemicals and net washing pipes for washing the surface of the drum on the slurry outlet.

Both ends of the slurry outlet are respectively equipped with fans, and the fans are provided with air inlet pipes.

Further improvements:

A washing device is provided at the position above the rotating drum on the drum groove, and the washing device includes 4-5 washing pipes arranged above the rotating drum. Each washing pipe sprays washing water evenly from the nozzles to clean the slurry. Replace wash.

The utility model adopts the above scheme, the power transmission device drives the rotating drum to rotate, and the rotating drum completes three technological processes of filtering, washing and pulping successively every time the rotating drum rotates once.

The pulp washing machine is generally installed on the third floor above 13 meters. The filtrate filtered by the drum enters the cell chamber through the stainless steel corrugated filter plate, and enters the chamber with different vertical heights through the filtrate flow channel, the valve seat drain port, the water leg base and the water leg. The water leg pipe less than 9 meters, the pulp washing machine relies on the filtrate to form a vacuum, the pulp is adsorbed on the surface of the drum filter, and the pulp enters the washing area in turn, and the washing pipe sprays out the washing water to replace the washing pulp, and the pulp reaches the stripper. In the slurry area, the low-pressure air blown out by the fan enters the blowing pressure area of the fan composed of the slurry surface, scraper surface, drum surface, etc. from the air inlet pipe, and is forced to spray out from the gap with the drum surface to hold up the slurry. The blade of the scraper body is peeled off, falls into the slurry outlet, and is transported to the next section by the crushing screw conveyor, which provides a working environment for the drum. At the same time, chemicals are added from the chemical liquid pipe, and the clean water sprayed from the net washing pipe rinses the drum. surface for enhanced filtration, displacement washing and concentration.

Below in conjunction with accompanying drawing and embodiment the technical utility model is further described.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model embodiment;

Accompanying drawing 2 is the left view of accompanying drawing 1 of the utility model;

Accompanying drawing 3 is the top view of accompanying drawing 1 of the utility model;

Accompanying drawing 4 is the installation structure schematic diagram of drum in the utility model embodiment;

Accompanying drawing 5 is B-B direction partial sectional view in accompanying drawing 4 of the present utility model;

Accompanying drawing 6 is A-A partial sectional view in accompanying drawing 4 of the present utility model;

Accompanying drawing 7 is C-C direction partial sectional view in accompanying drawing 4 of the present utility model;

Accompanying drawing 8 is the partial rotation sectional view of D-D in accompanying drawing 3 of the present utility model.

In the figure: 1-drum; 2-transmission device; 3-fan; 4-air scraper; 5-crushing screw conveyor; 6-drum groove; 7-distribution valve; 8-medicine liquid pipe; 10-washing device; 11-hood; 12-slurry inlet tank; 13-slurry outlet tank; 14-washing pipe; 15-water leg; 16-water leg base; 17-scraper blade; 18-valve seat drain 19-filtrate channel; 20-the first spacer; 21-stainless steel corrugated filter plate; 22-filter; 23-valve; 24-water leg pipe; -cone cylinder; 28-sealing belt; 29-drum operation side end plate; 30-second spacer; 31-support plate; 32-compartment; 33-slurry; 34-washing area; 35-blower Air pressure zone; 36-stripping zone; 37-vacuum suction filter zone; 38-drum drive side end plate; 39-valve cover; 40-baffle.

Detailed ways

Embodiment, as shown in Fig. 1, Fig. 2, Fig. 3, a kind of pulp washing machine comprises drum groove 6, and the top of drum groove 6 is provided with machine cover 11, and described drum groove 6 is provided with drum 1, and drum 1 is provided with a filter screen 22 on the outer circumference, one side of the drum groove 6 is provided with a slurry inlet tank 12, and the other side is provided with a slurry outlet tank 13, and the top of the slurry outlet tank 13 is close to the position of the drum 1 Equipped with stripping device;

The stripping device includes an air scraper 4 installed above the pulp outlet 13 and close to the drum 1 .

A slurry output device is provided in the pulp outlet 13, and the device is a crushing screw conveyor 5, which is arranged in the pulp outlet 13 at a position below the depulping device.

The crushing teeth on the screw shaft blades of the crushing screw conveyor 5 are set every 52.5°, and the number of crushing teeth is doubled to improve the crushing effect. impact, protect the bearing and prolong the service life of the bearing.

The slurry outlet tank 13 is provided with a liquid medicine pipe 8 for adding chemicals and a mesh washing pipe 9 for washing the surface of the drum.

The two ends of the slurry outlet 13 are respectively equipped with a blower fan 3, and the blower blower 3 is provided with an air inlet pipe.

The pulp feeding tank 12 is provided with a pulp feeding pipe 25 , and the other end of the pulp feeding pipe 25 is connected with a pulp pump 26 .

Both ends of the drum groove 6 are respectively provided with a drum operating side end plate 29 and a drum driving side end plate 38 , and a distributing valve 7 is provided at the center of the drum operating side end plate 29 .

A valve cover 39 is installed on the outside of the distribution valve 7 , one end of the water leg 15 is connected to the valve cover 39 through the water leg base 16 , and the other end is connected to the water leg pipe 24 .

A washing device 10 is provided at the position above the drum 1 on the drum tank 6, and the washing device 10 includes 4-5 washing pipes 14 arranged above the drum 1, and each washing pipe 14 is sprayed out evenly by the nozzles. Washing water is used to replace and wash the slurry.

As shown in Figure 4, a cone cylinder 27 is coaxially installed in the drum 1, the two ends of the cone cylinder 27 are closed, and the outer peripheral surface of the cone cylinder 27 is in contact with the inner peripheral surface of the drum 1. The filtrate flow channel 19 is formed between the end surface of the cone body 27 and the drum operation side end plate 29. The drum operation side end plate 29 of the drum 1 is provided with a filtrate flow channel 19 and a valve seat drain Mouth 18.

The valve seat drain port 18 communicates with the water leg 15 through the sealing belt 28 and the valve cover 39, so that the filtrate is quickly discharged from the drum 1, and the end of the drum 1 near the end plate 38 on the driving side of the drum is connected with a power transmission device 2 , the power transmission device is a motor and a reducer connected by transmission.

The reducer adopts a reinforced hard-tooth surface gear reducer, which increases the transmission ratio and improves the service life.

The design of the cone body 27 increases the cross-sectional area of the valve seat discharge port 18, reduces the resistance of the filtrate flow channel 19, increases the flow rate of the filtrate, completely solves the phenomenon of filtrate regurgitation, improves the dryness of the slurry, and reduces the The residual alkali content of the material improves the alkali recovery rate.

As shown in Fig. 5 and Fig. 6, 30-38 first spacers 20 are evenly arranged between the drum 1 and the cone body 27 along the circumferential direction, and the first spacer bars 20 are arranged on the outer circumference of the cone body 27. The filtrate channel 19 between the surface and the inner peripheral surface of the drum 1 is divided into 30-38 compartments 32, and each compartment 32 communicates with the valve seat drain port 18 through the filtrate channel 19.

The stainless steel corrugated filter plate 21 used to support the filter screen 22 is installed in the compartment 32 .

A second spacer 30 and a support plate 31 for supporting the stainless steel corrugated filter plate 21 are provided between the adjacent first spacers 20 .

The thickness of the second spacer 30 is smaller than the thickness of the first spacer 20 .

As shown in FIG. 7 , the cone body 27 is provided with a partition plate 40 corresponding to the first spacer 20 one by one, and the filtrate flow channel 19 formed between the end surface of the cone body 27 and the drum operation side end plate 29 is located at Between adjacent partitions 40 .

The spool 23 of the distributing valve 7 is a combination of two fan-shaped pieces, made of phenolic bakelite material, which has the characteristics of heat resistance, high rigidity, and good chemical stability. Each piece is small in size, not easy to deform, and has increased The outer circle of the spool, the spool is installed on several brackets, and all the brackets are installed on the static ring of the bonnet, which will not change after being fixed. The bonnet is changed to a split structure and installed on the tank side On the board, it is convenient for maintenance. The valve core divides the entire circumference into two major areas: the vacuum area of the uncovered part and the peeling area 36 of the valve core covered part. The vacuum area includes a vacuum suction filter area 37 and corresponds to the washing pipe 14. The washing area 34.

As shown in Figure 8, the upper end of the air scraper 4 is equipped with a scraper body blade 17, the air scraper 4 is semicircular, which reduces weight, has high strength, reduces welding workload, and straightness meets the design requirements.

The transmission device 2 drives the rotating drum 1 to rotate, and the rotating drum 1 completes three technological processes of filtering, washing, and depulping of the slurry in succession every time the rotating drum 1 rotates once.

The pulp washing machine is generally installed on the third floor above 13 meters. The filtrate filtered by the drum 1 enters the compartment 32 through the stainless steel corrugated filter plate 21, and passes through the filtrate flow channel 19, the valve seat drain port 18, the water leg base 16 and the water tank. The leg 15 enters the water leg pipe 24 with a vertical height of not less than 9 meters. The pulp washing machine relies on the filtrate to form a vacuum, and the pulp is adsorbed on the surface of the drum filter. The pulp enters the washing area in sequence, and the washing pipe sprays out washing water to replace After the slurry is washed, the slurry 33 reaches the stripping area, and the low-pressure air blown out by the fan 3 enters the air blowing pressure area 35 of the fan composed of the slurry surface, the scraper body surface, and the drum surface through the air inlet pipe, and is forced to flow from the surface of the drum and the drum surface. The slurry 33 is lifted up by the gap spraying, peeled off by the scraper body blade 17, falls into the slurry outlet trough 13, and is transported to the next section by the crushing screw conveyor 5, providing a working environment for the drum 1.

Simultaneously, chemicals are added by liquid medicine pipe 8, and the clear water sprayed out by net washing pipe 9 washes the drum surface.

Claims (10)

1. wash engine; Comprise bulging groove (6), be provided with rotary drum (1) in the said bulging groove (6), the excircle of rotary drum (1) is provided with filter screen (22); One side of said bulging groove (6) is provided with into stock tank (12); Opposite side is provided with slurry outlet groove (13), and said slurry outlet groove (13) is provided with the stripping sizing device, and slurry outlet groove is provided with the slurry output device in (13);

It is characterized in that:

Be coaxially installed with a conic tube (27) in the said rotary drum (1), form filtrating runner (19) between said conic tube (27) and the rotary drum (1), an end of said rotary drum (1) is provided with the valve seat leakage fluid dram (18) that is communicated with the runner of filtrating (19).

2. a kind of wash engine according to claim 1 is characterized in that:

The two ends of said bulging groove (6) are respectively equipped with rotary drum fore side end plate (29) and rotary drum transmission side end plate (38), are provided with the distributing valve (7) that is communicated with valve seat leakage fluid dram (18) in the center of rotary drum fore side end plate (29);

The outside of distributing valve (7) is equipped with valve gap (39), is connected with water leg (15) on the valve gap (39), and the other end of water leg (15) is connected with water leg pipe (24).

3. a kind of wash engine according to claim 2 is characterized in that:

The edge circumferentially evenly is provided with 30-38 first parting bead (20) between said rotary drum (1) and the conic tube (27); First parting bead (20) is partitioned into 30-38 lattice chamber (32) with the filtrating runner (19) between the inner peripheral surface of the outer circumference surface of conic tube (27) and rotary drum (1), and each lattice chamber (32) is connected with valve seat leakage fluid dram (18) through filtrating runner (19).

4. a kind of wash engine according to claim 3 is characterized in that: the stainless steel ripple filter plate (21) that is used for supporting filter screen (22) is installed in the said lattice chamber (32); Be provided with second parting bead (30) and the gripper shoe (31) that is used for supporting stainless steel ripple filter plate (21) between said adjacent first parting bead (20).

5. a kind of wash engine according to claim 4; It is characterized in that: be provided with in the conic tube (27) and first parting bead (20) dividing plate (40) one to one, the filtrating runner (19) that forms between conic tube (27) end face and the rotary drum fore side end plate (29) is positioned between the adjacent dividing plate (40).

6. a kind of wash engine according to claim 5 is characterized in that: said stripping sizing device is air doctor blade (4), is arranged on the position of the top of slurry outlet groove (13) near rotary drum (1).

7. a kind of wash engine according to claim 6 is characterized in that: the upper end of said air doctor blade (4) is equipped with scrapes cutter hub blade (17), and air doctor blade (4) is a semicircular structure.

8. a kind of wash engine according to claim 7 is characterized in that: the slurry output device is for being arranged on the spiral smashing conveyor (5) of the position that is positioned at stripping sizing device below in the slurry outlet groove (13).

9. a kind of wash engine according to claim 8 is characterized in that: slurry outlet groove (13) be provided with the drug liquid tube (8) that adds chemicals with wash drum surface wash webmaster (9); The two ends of slurry outlet groove (13) are separately installed with blower fan (3), and blower fan (3) is provided with blast pipe.

10. a kind of wash engine according to claim 9 is characterized in that: the position that is positioned at the top of rotary drum (1) on the said bulging groove (6) is provided with wash mill (10).

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