CN108409043B

CN108409043B - Paper pulp sewage treatment method for paper mill

Info

Publication number: CN108409043B
Application number: CN201810284384.2A
Authority: CN
Inventors: 王欢涛; 李纯; 蒲乐乐
Original assignee: Yunnan Yunjing Forestry & Pulp Mill Co ltd
Current assignee: YUNNAN YUNJING FORESTRY & PULP MILL Co.,Ltd.
Priority date: 2018-04-02
Filing date: 2018-04-02
Publication date: 2020-06-30
Anticipated expiration: 2038-04-02
Also published as: CN108409043A

Abstract

The invention discloses a paper pulp sewage treatment method for a paper mill, which comprises the following steps: introducing the paper pulp sewage into a primary filtering tank, and adding a flocculating agent into the primary filtering tank to reduce the concentration of the paper pulp sewage; introducing the sewage into sewage filtering equipment for filtering to realize secondary filtering and separation of the paper pulp sewage; fishing the precipitated paper pulp out of the water by using a fishing net; introducing the separated sewage into an aeration tank for aeration, adding hemp fibers or artificial fiber fibers into the aeration tank, and manually fishing out the floated hemp fibers or artificial fiber fibers gathered into a cluster; introducing the aerated sewage into an aerobic biological reaction tank and an anaerobic biological reaction tank in sequence for aerobic and anaerobic treatment; and (4) introducing the sewage subjected to anaerobic treatment into an open air drying pond for evaporation and drying. The invention adopts multi-stage filtration, aerobic and anaerobic treatment and evaporative treatment, greatly simplifies the sewage treatment process and has better application effect.

Description

Paper pulp sewage treatment method for paper mill

Technical Field

The invention belongs to the field of wastewater treatment, and particularly relates to a method for treating paper pulp wastewater for a paper mill.

Background

The paper pulp wastewater refers to wastewater generated in the paper making process, the direct discharge of the wastewater can seriously affect the environment, and a large amount of paper pulp is usually remained in the paper pulp wastewater, so that the paper pulp wastewater has high recycling value, and therefore, the paper pulp wastewater is filtered and collected for recycling before being discharged, so that the environmental pollution is reduced, and the production cost is saved.

However, the existing filtering device for the pulp wastewater still has certain defects when in use, and because the mode of collecting the pulp in the wastewater by using the filter screen is often adopted in the filtering process, the pulp gathered on the filter screen still needs to be washed by clean water when being removed, so that the defect of wasting water resources exists.

Meanwhile, the concentration of the paper pulp is different, and the paper pulp is easy to precipitate, so that the treatment equipment can not normally operate when the paper pulp is treated, the equipment is easy to damage, and the period and the cost of sewage treatment are prolonged due to the increase of the maintenance time.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for treating paper mill pulp waste water, which is mainly used for treating paper mill pulp waste water and can achieve harmless treatment of waste water.

The invention realizes the aim through the following technical scheme, and the paper pulp sewage treatment method for the paper mill comprises the following steps:

step one, introducing the paper pulp sewage into a primary filter tank, and adding a flocculating agent into the primary filter tank to reduce the concentration of the paper pulp sewage;

step two, guiding the sewage in the step one into sewage filtering equipment for filtering, and realizing secondary filtering and separation of the paper pulp sewage; fishing out the paper pulp precipitated in the step one by using a fishing net;

step three, introducing the sewage separated in the step two into an aeration tank for aeration, simultaneously adding hemp fibers or artificial fiber fibers into the aeration tank, and then manually fishing out the floated hemp fibers or artificial fiber fibers gathered into a ball;

step four, the sewage after aeration in the step three is sequentially introduced into an aerobic biological reaction tank and an anaerobic biological reaction tank for aerobic and anaerobic treatment;

step five, introducing the sewage subjected to anaerobic treatment in the step four into an open air drying pool for evaporation drying; a plurality of outdoor drying ponds are arranged, evaporation reflectors are arranged around the outdoor drying ponds and reflect sunlight into sewage so as to improve the evaporation efficiency of the sewage;

the sewage filtering device adopted in the second step comprises a machine case, a top case and a bottom frame, wherein the top case is arranged at the top of the machine case, a motor is arranged in the top case, a water pump is arranged at one side of the motor, a feed inlet is arranged on the side wall of the machine case, the bottom frame is arranged at the bottom of the machine case, a treatment barrel is arranged at the bottom of the inner wall of the machine case, a net frame is arranged in the treatment barrel, the net frame is welded at the bottom of a rotating rod, a layer of filter screen is sleeved on the net frame, a plurality of water holes are arranged on the frame of the net frame, a sliding block is arranged at the top of the rotating rod and is arranged on a sliding rod in the machine case, a water storage tank is arranged at one side of the sliding rod, a sliding groove is arranged in the middle of the sliding rod, the sliding block is arranged in the sliding groove, the collecting barrel and the processing barrel are both positioned under the slide rod; in order to enable the wastewater fed through the feed inlet to directly flow into the treatment barrel, the feed inlet and the outer wall of the case are obliquely arranged at an angle of 30 degrees, and the bottom of the feed inlet is directly opposite to the treatment barrel; in order to enable the net rack to suck water into the water storage tank through the water holes, the rotating rod is of a hollow structure, and a water pipe communicated with the water storage tank at the top of the rotating rod is communicated with the water holes; in order to enable the water hole to filter water when absorbing water so as not to absorb impurities such as paper pulp and the like, a layer of mesh enclosure is arranged on the water hole; in order to filter residual paper pulp when the treatment barrel and the collecting barrel drain, filter discs are respectively arranged at the bottoms of the inner walls of the treatment barrel and the collecting barrel, and water drainage openings are respectively arranged at the bottoms of the outer walls of the treatment barrel and the collecting barrel; in order to ensure that each component in the device has enough power source during operation, the motor is connected with the rotating rod, and the water pump is communicated with the water storage tank through a water pipe.

The motor is connected with the top box through the overload protector, the overload protector is used for protecting the motor, the overload protector is connected between the motor shell and the top box, the overload protector is convenient to replace, and meanwhile, the motor is convenient to install and detach.

As an implementation mode of the overload protector, the overload protector is a coupler, one end of the coupler is welded or connected to the top of the top box through a bolt, the other end of the coupler is connected with a shell of the motor through a screw, and the coupler and the motor are coaxially arranged. Furthermore, the coupler is a flexible coupler with an elastic element, so that frequent replacement of the coupler can be avoided, overload can be responded through rotation of the motor shell, and damage to components connected with the motor can be avoided.

As another embodiment of the present invention, the overload protector includes a guide rod, an adjuster, and a tension rope, the guide rod is vertically installed on the top of the top box, the motor is coaxially installed on the guide rod and can slide up and down along the guide rod, the adjuster is installed on the motor, the adjuster is used for increasing the downward stress of the motor, the tension rope is uniformly arranged around the guide rod, one end of the tension rope is fixedly connected to the top of the top box, and the other end of the tension rope is fixedly connected to the motor housing. When the motor is used, the motor is started, the motor shell winds the tension rope under the reverse acting force, the motor shell keeps balance under the four forces of the reverse torsion of the rotor, the gravity of the motor, the force of the regulator on the motor and the tension rope, and when the torsion borne by the motor is increased, the motor can move upwards under the action of the tension rope and the guide rod, so that the resistance borne by the motor is reduced, and the purpose of overload protection is realized; when the resistance is reduced, the motor returns to the original position under the action of the gravity of the motor and the regulator, and full filtration is realized.

As an embodiment of the present invention, the adjuster is a weight balancing block, the weight balancing block is used to increase the weight of the motor, and according to the actual use condition, an operator can manually change the gravity of the motor, thereby realizing the adjustment of the overload force.

As an embodiment of the present invention, the adjuster is an elastic member, one end of the elastic member is fixedly connected to the motor housing, and the other end of the elastic member is connected to the top of the top box. Further, the elastic piece is adjustable in elasticity.

The invention has the beneficial effects that:

1. the method for treating the paper pulp sewage of the paper mill can realize harmless treatment of the paper pulp sewage of the paper mill, greatly simplifies the treatment process of the sewage by adopting multi-stage filtration, aerobic and anaerobic treatment and evaporative treatment, and has better application effect.

2. According to the invention, the collecting barrel is additionally arranged in the case and is used for collecting the paper pulp filtered by the filter screen, and when the filter screen collects and filters the waste water, the filter screen is moved to the inside of the collecting barrel by the sliding block at the top of the rotating rod sliding on the sliding rod. Through set up a plurality of water hole on the rack of installation filter screen, cover one deck screen panel on the water hole, the water hole is connected with the storage water tank through hollow structure bull stick and water pipe, make the filter screen can inhale inside the storage water tank with partial waste water when collecting the filtration paper pulp waste water, and inhaled water filters nothing debris through the screen panel on the water hole, when the filter screen moves to the collecting vessel inside, the paper pulp on the filter screen is got rid of comparatively trouble this moment, the storage water tank drains, discharge absorbent water from the water hole, play the effect of erodeing the filter screen, thereby wash into the collecting vessel with recoverable paper pulp on the filter screen inside, can directly collect paper pulp after the filter disc of collecting vessel bottom filters out water, need not artifical with clean water and brush paper pulp from the filter screen. The device has the characteristics of more energy-saving use and higher utilization rate of the waste water.

3. Compared with the prior art, the motor overload protector is arranged between the motor shell and the top box, so that the replacement of the overload protector and the motor is facilitated, and the damage of the net rack caused by overlarge load can be avoided in a mode of rotating the motor shell, so that the service life of the device is prolonged.

4. According to the overload protector, the guide rod, the regulator and the tension rope are arranged to realize automatic overload regulation of the motor, so that the motor and the net rack are protected, and the service life of the overload protector is prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the chassis according to the present invention.

FIG. 3 is a schematic view of the internal structure of the barrel of the present invention.

Fig. 4 is a schematic view of a screen structure according to the present invention.

In the figure: 1. the device comprises a case, 2, a top case, 3, a feeding hole, 4, a bottom frame, 5, a motor, 51, a coupler, 6, a water pump, 7, a water storage tank, 8, a water pipe, 9, a slide rod, 10, a filter screen, 11, a treatment barrel, 12, a collection barrel, 13, a filter disc, 14, a chute, 15, a slide block, 16, a telescopic rod, 17, a rotating rod, 18, a water hole, 19 and a net rack.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, a method for treating paper mill pulp sewage according to the present invention comprises the following steps:

the sewage filtering device adopted in the second step comprises a machine case 1, a top box 2 and a bottom frame 4, wherein the top box 2 is arranged at the top of the machine case 1, a motor 5 is arranged in the top box 2, a water pump 6 is arranged at one side of the motor 5, a feed inlet 3 is arranged on the side wall of the machine case 1, the bottom frame 4 is arranged at the bottom of the machine case 1, a processing barrel 11 is arranged at the bottom of the inner wall of the machine case 1, a net frame 19 is arranged in the processing barrel 11, the net frame 19 is welded at the bottom of a rotating rod 17, a layer of filter screen 10 is sleeved on the net frame 19, a plurality of water holes 18 are arranged on the frame of the net frame 19, a sliding block 15 is arranged at the top of the rotating rod 17, the sliding block 15 is arranged on a sliding rod 9 in the machine case 1, a water storage tank 7 is arranged at one side of the sliding rod 9, a sliding groove 14 is arranged in the middle part, and the collecting barrel 12 and the treating barrel 11 are both positioned right below the slide rod 9. The feed inlet 3 and the outer wall of the case 1 are inclined at 30 degrees, the bottom of the feed inlet 3 faces the treatment barrel 11, and wastewater fed through the feed inlet 3 can directly flow into the treatment barrel 11. The rotating rod 17 is of a hollow structure, the water pipe 8 communicated with the water storage tank 7 at the top of the rotating rod 17 is communicated with the water hole 18, and the net rack 19 can suck water into the water storage tank 7 through the water hole 18. The water hole 18 is provided with a layer of mesh enclosure, and the water hole 18 can filter water when absorbing water, so that impurities such as paper pulp can not be absorbed. Filter disc 13 is all installed to treatment tank 11 and the bottom of collecting vessel 12 inner wall, and treatment tank 11 all sets up the outlet with collecting vessel 12 outer wall bottom, and treatment tank 11 and collecting vessel 12 can filter remaining paper pulp when the drainage. The motor 5 is connected with a rotating rod 17, the water pump 6 is communicated with the water storage tank 7 through a water pipe 8, and all components in the device have enough power sources during operation.

The motor 5 is connected with the top box 2 through the overload protector, the overload protector is used for protecting the motor 5, the overload protector is connected between the shell of the motor 5 and the top box 2, the overload protector is convenient to replace, and meanwhile, the motor 5 is convenient to install and detach.

In an embodiment of the present invention, the overload protector is a coupler 51, one end of the coupler 51 is welded or connected to the top of the top box 2 through a bolt, the other end of the coupler 51 is connected to the housing of the motor 5 through a bolt, and the coupler 51 and the motor 5 are coaxially arranged. Furthermore, the coupling 51 is a flexible coupling with an elastic element, which can avoid frequent replacement of the coupling 51, and prevent damage to components connected with the motor 5 by the overload condition due to the rotation of the motor 5 housing.

As another embodiment of the present invention, the overload protector includes a guide rod, an adjuster, and a tension rope, the guide rod is vertically installed on the top of the top box 2, the motor 5 is coaxially installed on the guide rod and can slide up and down along the guide rod, the adjuster is installed on the motor 5, the adjuster is used for increasing the downward stress of the motor 5, the tension rope is uniformly arranged around the guide rod, one end of the tension rope is fixedly connected to the top of the top box 2, and the other end of the tension rope is fixedly connected to the housing of the motor 5. When the motor 5 is used, the motor 5 is started, the shell of the motor 5 winds the tension rope under the reverse acting force, the shell of the motor 5 keeps balance under the four forces of the reverse torsion of the rotor, the gravity of the motor 5, the force of the regulator on the motor 5 and the tension rope, and when the torsion borne by the motor 5 is increased, the motor 5 can move upwards under the actions of the tension rope and the guide rod, so that the resistance borne by the motor 5 is reduced, and the purpose of overload protection is realized; when the resistance is reduced, the motor 5 returns to the original position under the action of the gravity of the motor 5 and the regulator, and full filtration is realized.

As an embodiment of the present invention, the adjuster is a weight balancing block, the weight balancing block is used to increase the weight of the motor 5, and according to the actual use condition, an operator can manually change the gravity of the motor 5, thereby realizing the adjustment of the overload force.

As an embodiment of the present invention, the adjuster is an elastic member, one end of the elastic member is fixedly connected to the housing of the motor 5, the other end of the elastic member is connected to the top of the top box 2, and the elastic member is configured to provide a downward force to the motor 5, so as to prevent the motor 5 from rising too much. Furthermore, the elasticity of the elastic part is adjustable, and the elastic part can work under different loads, so that the application range of the invention is widened.

When the sewage filtering apparatus is used, a collecting barrel 12 is additionally arranged inside the machine case 1 for collecting the pulp filtered by the filter screen 10, and when the filter screen 10 is used for collecting and filtering the waste water, the slide block 15 at the top of the rotating rod 17 slides on the slide rod 9 so as to move the filter screen 10 to the inside of the collecting barrel 12. Through set up a plurality of water hole 18 on the rack 19 of installation filter screen 10, cover one deck screen panel on the water hole 18, water hole 18 is connected with storage water tank 7 through hollow structure bull stick 17 and water pipe 8, make filter screen 10 can inhale storage water tank 7 inside with partial waste water when collecting the filtration paper pulp waste water, and inhaled water filters no debris through the screen panel on water hole 18, when filter screen 10 moves to collecting vessel 12 inside, the paper pulp on the filter screen 10 got rid of comparatively trouble this moment, storage water tank 7 drains, discharge adsorbed water from water hole 18, play the effect of scouring filter screen 10, thereby wash inside recoverable paper pulp on the filter screen 10 pours into collecting vessel 12, can directly collect paper pulp after the filter disc 13 of collecting vessel 12 bottom filters out the water, need not artifical clean water and wash paper pulp from filter screen 10. The device has the characteristics of more energy-saving use and higher utilization rate of the waste water.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A paper mill pulp sewage treatment method is characterized by comprising the following steps:

when the sewage filtering device is used, a collecting barrel (12) is additionally arranged inside a machine box (1) and is used for collecting paper pulp filtered by a filter screen (10), and when the filter screen (10) collects and filters waste water, a sliding block (15) at the top of a rotating rod (17) slides on a sliding rod (9) so as to move the filter screen (10) to the inside of the collecting barrel (12); a plurality of water holes (18) are arranged on a net rack (19) for mounting a filter screen (10), a layer of net cover covers the water holes (18), the water holes (18) are connected with a water storage tank (7) through a hollow structure rotating rod (17) and a water pipe (8), so that when the filter screen (10) collects and filters pulp waste water, partial waste water can be sucked into the water storage tank (7), the sucked water is free of impurities through the net cover on the water holes (18), when the filter screen (10) is moved into a collecting barrel (12), the pulp on the filter screen (10) is troublesome to remove, the water storage tank (7) drains water, the adsorbed water is discharged from the water holes (18), the function of flushing the filter screen (10) is achieved, the recyclable pulp on the filter screen (10) is flushed into the collecting barrel (12), and the pulp can be directly collected after a filter disc (13) at the bottom of the collecting barrel (12) filters out water, the pulp is flushed from the filter screen (10) without manually using clean water;

the sewage filtering equipment adopted in the second step comprises a case (1), a top case (2) and a bottom frame (4), wherein the top case (2) is installed at the top of the case (1), a motor (5) is installed inside the top case (2), a water pump (6) is installed on one side of the motor (5), a feed inlet (3) is formed in the side wall of the case (1), the bottom frame (4) is installed at the bottom of the case (1), a treatment barrel (11) is installed at the bottom of the inner wall of the case (1), a net rack (19) is installed inside the treatment barrel (11), the net rack (19) is welded at the bottom of a rotating rod (17), a layer of filter screen (10) is sleeved on the net rack (19), a plurality of water holes (18) are formed in the frame of the net rack (19), a sliding block (15) is installed at the top of the rotating rod (17), and the sliding block (15) is installed on a sliding, a water storage tank (7) is mounted on one side of the sliding rod (9), a sliding chute (14) is formed in the middle of the sliding rod (9), the sliding block (15) is mounted inside the sliding chute (14), two telescopic rods (16) are mounted between the sliding block (15) and the net rack (19), a collecting barrel (12) is mounted on one side of the processing barrel (11), the collecting barrel (12) and the processing barrel (11) lean against each other, and the collecting barrel (12) and the processing barrel (11) are both located under the sliding rod (9); the feed port (3) and the outer wall of the case (1) are obliquely arranged at an angle of 30 degrees, and the bottom of the feed port (3) is right opposite to the treatment barrel (11); the rotating rod (17) is of a hollow structure, and a water pipe (8) communicated with the water storage tank (7) at the top of the rotating rod (17) is communicated with a water hole (18); a layer of mesh enclosure is arranged on the water hole (18); filter discs (13) are respectively arranged at the bottoms of the inner walls of the treatment barrel (11) and the collection barrel (12), and water drainage openings are respectively arranged at the bottoms of the outer walls of the treatment barrel (11) and the collection barrel (12); the motor (5) is connected with the rotating rod (17), and the water pump (6) is communicated with the water storage tank (7) through a water pipe (8);

the motor (5) is connected with the top box (2) through an overload protector, and the overload protector is used for protecting the motor (5);

the overload protector is a coupler (51), one end of the coupler (51) is welded or connected to the top of the top box (2) through a bolt, and the other end of the coupler (51) is connected with the shell of the motor (5) through a screw;

the coupling (51) is a flexible coupling with elastic elements;

overload protection ware includes guide bar, regulator and pulling force rope, the guide bar is vertical to be installed at top case (2) top, motor (5) coaxial arrangement can be followed the guide bar and slided from top to bottom on the guide bar, the regulator is installed on motor (5), and the regulator is used for increasing the decurrent atress of motor (5), pulling force rope evenly arranges around the guide bar, and the one end of pulling force rope links firmly at top case (2) top, and the other end of pulling force rope links firmly on motor (5) shell.

2. The method for treating paper mill pulp sewage according to claim 1, characterized in that: the regulator is a balancing weight used for increasing the weight of the motor (5).

3. The method for treating paper mill pulp sewage according to claim 1, characterized in that: the regulator is an elastic piece, one end of the elastic piece is fixedly connected with the shell of the motor (5), and the other end of the elastic piece is connected with the top of the top box (2).

4. The method for treating paper mill pulp sewage according to claim 3, characterized in that: the elastic piece is adjustable in elasticity.