KR200155512Y1 - Belt washing device of dewatering equipment with beltpress type - Google Patents

Abstract

The present invention relates to a belt cleaning device of a belt press type dehydrator, and in particular, by mounting the injection nozzle in the movable head slidingly orthogonal to the belt movement direction, the injection pressure of the injection nozzle is increased to stop the dehydrator by perfect cleaning. The present invention relates to a belt cleaning device of a belt press type dehydrator capable of reducing time and reducing washing water.

The present invention is a belt cleaning device of a double belt press type dehydrator, a pair of guide guides arranged at a predetermined interval on the upper side of the belt in the direction perpendicular to the conveying direction of the contaminated belt made of filter cloth, and the guide guide A movable injection head means for injecting the washing water of a predetermined pressure supplied from a washing water supply source through the spray nozzle and the movable spray head means close to both sides of the belt by being slidably supported on the lower side; A pair of return signal generating means for generating the first and second return signals, and the drive direction is reciprocated along the guide guide by inverting the driving direction each time the first and second return signals are detected. Characterized in that it consists of a head drive means for.

Description

Belt cleaning device of belt press type dehydrator

The present invention relates to a belt cleaning device of a belt press type dehydrator, and in particular, by mounting the injection nozzle in the movable head slidingly orthogonal to the belt movement direction, the injection pressure of the injection nozzle is increased to stop the dehydrator by perfect cleaning. The present invention relates to a belt cleaning device of a belt press type dehydrator capable of reducing time and reducing washing water.

In general, the purification treatment of municipal sewage activated sludge, manure active surplus sludge, various industrial wastewater activated sludge, and chemical precipitation sludge in water purification plant is mixed with a polymer flocculant in a sludge agitating tank to achieve good dewatering floc (FLOC). After the formation of this, the dehydration of the cake (CAKE) by the process of removing the water by supplying it to the dehydrator is transferred to an incinerator or landfill, and the desorption filtrate is returned to the aeration tank with the washing water.

In the dewatering of the sludge as described above, a double belt press type dehydrator as shown in FIG. 1 is mainly used. The dehydrator 1 shown in FIG. 1 first feeds various sludges to be treated as a pretreatment to the quantitative supply tank 3 and then drains the filtrate, and deposits the sludge together with the polymer flocculant in the sludge stirring tank 7. It is supplied and reacted to form a floc suitable for dehydration while being homogenized with the stirrer (5).

Then, evenly supplied to the lower belt 11 for sludge transfer through the chute chute (9) of the dehydrator (1), through the gravity dewatering and wedge dehydration, for example, each has an uneven structure on the front or a plurality of water discharge As the upper belt 15 and the lower belt 11 made of, for example, polyester filter cloth are squeezed in the four-stage compression rolls 13A-13D with holes formed, water flows down to the drainage system. The debris is collected and discharged to the outside in the form of a cake.

In this case, the upper belt 15 and the lower belt 11 have cake residues attached to the upper / lower belts 15 and 11 in the process of pressing the sludge, and the upper belt 15 and the cleaning device 25 and 27 for removing the upper belts are removed. 15 and lower belt 11, respectively.

In Fig. 1, reference numerals 17 and 19 designate upper and lower belt meandering devices, and 21 and 23 designate upper and lower cushioning devices, respectively.

The conventional belt washing apparatus 25, 27 has a plurality of spray nozzles 29 in the line-type washing water supply pipe 31, respectively, as shown in FIG. 2 and has a belt on the upper side of the belts 11, 15. It has a structure fixedly installed at right angles to the traveling direction of

However, this conventional line type belt washing apparatus has a plurality of spray nozzles and thus requires a high pressure water pump. As a result, the spray pressure of each spray nozzle is low, so that it is not completely cleaned and rotated for a new dehydration process. .

Therefore, when the new sludge is supplied and the dehydration process is repeated, a strip-shaped fine chuck portion 33 is generated as shown in FIG. 2, and when such a vicious cycle is repeated, the dehydration effect is drastically reduced. In addition, there is a problem in that the system operating efficiency is low because the system must be stopped and the failed nozzle must be repaired even when any one of the nozzles fails.

In addition, in the past, since a plurality of injection nozzles are provided, noise is generated and the amount of washing water used is increased, for example, when one dehydrator having a belt width of 30 m is operated. The flow rate of / hr is required, and as described later, a large amount is used, and as a result, there is a problem of greatly increasing the load of the aeration tank for treating the tally filtrate and the belt washing water.

Therefore, the present invention has been devised in view of the problems of the prior art, and its purpose is to provide a perfect cleaning by increasing the injection pressure of the injection nozzle by mounting the injection nozzle in the movable head slidingly orthogonal to the belt moving direction. The present invention provides a belt cleaning device for a belt press type dehydrator capable of reducing downtime of the dehydrator and reducing washing water.

1 is a schematic process diagram of a general double belt press type dehydrator to which the present invention is applied.

2 is a schematic plan view showing the structure of the conventional belt cleaning apparatus shown in FIG.

3 is a plan view showing a pneumatic belt cleaning device according to a first embodiment of the present invention.

4 is a front view of the pneumatic belt cleaning device of FIG.

5 is a side view of the pneumatic belt cleaning device of FIG.

Figure 6 is a plan view showing a mechanical belt cleaning device according to a second embodiment of the present invention.

7 is a front view of the mechanical belt cleaning apparatus of FIG.

* Explanation of symbols for main parts of the drawings

36: support frame 38: support frame

40: injection nozzle 42: belt

44: guide frame 46: jet head unit

48: roller 50: pneumatic cylinder

52: nozzle pipe 54: hose

56: water pump 58, 60: limit switch

62,64: flow control valve 66: solenoid valve

68: air unit 70: compressor

72: second sealing member 74: brush

76: blocking box 80: injection head unit

82,84: ball screw 86: support frame

88A-88D: Ball Bushing Guide 90A-90D: Support Bracket

92A, 92B, 94A, 94B: Bevel Gear 96: Drive Motor

98A, 98B: Bush

In order to achieve the above object, the present invention is a belt cleaning device of a double belt press type dehydrator, a pair of arranged at a predetermined interval on the upper side of the belt in the direction perpendicular to the conveying direction of the contaminated belt made of filter cloth A guide guide, movable spray head means for spraying the lower side of the guide guide slidably and supplied with washing water of a predetermined pressure supplied from a washing water source to the contaminated belt through a spray nozzle, and the movable spray head means being a belt. A pair of return signal generating means for detecting the proximity to both sides of and generating first and second return signals, and inverting the driving direction each time the first and second return signals are detected; Three belts comprising a head drive means for reciprocating along the guide guide Provide a chuck device.

When the head drive means is a pneumatic method, the one guide guide is composed of a pneumatic cylinder fixed to a movable piston in which one side of the injection head means is built in the cylinder, the pneumatic in response to the first or second return signal It further includes a control valve for switching the application direction of the pneumatic pressure applied to the cylinder.

In addition, when the head driving means is mechanical, the pair of guide guides are composed of a ball screw, the head driving means is fixed to the lower side of the injection head means ball for changing the rotational movement of the ball screw in a linear motion And a bush guide, a drive motor for generating rotational power, and a power transmission means for transmitting the rotational power to the ball screw.

In addition to having a single injection nozzle, the injection head means may include two to three injection nozzles in one of the same direction or a direction perpendicular to the moving direction of the injection head means, if necessary.

Furthermore, the present invention further includes a water splash blocking means installed on the outer shell of the spray head means to block the sprayed washing water from jumping out of the belt, and the water splash blocking means is installed on the inner side and has chemical resistance and wear resistance. It may be composed of a first sealing member made of a material, and a second sealing member having a brush which is installed on the outer shell of the first sealing member and is installed in contact with the belt at the lower end.

As described above, in the present invention, since the spray head provided with at least one spray nozzle is a method of washing the contaminated belt while sliding reciprocating in a direction perpendicular to the moving direction of the belt, the nozzle may be used even though a water pump with a low pressure is used. The injection pressure sprayed through is greatly increased so that a complete washing can be achieved with a small amount of washing water. As a result, dehydration efficiency can be increased and cost can be reduced.

EXAMPLE

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 is a plan view showing a pneumatic belt cleaning device according to a first preferred embodiment of the present invention, FIG. 4 is a front view of the pneumatic belt cleaning device of FIG. 3, and FIG. 5 is a pneumatic belt of FIG. Side view of the cleaning device.

3 to 5, a pneumatic type belt cleaning device according to the first embodiment of the present invention is installed on the upper belt and the lower belt, respectively, which are generally made of filter cloth having a width of 3 m. In this case, in the present invention, the injection head unit 46 in which the single injection nozzle 40 is mounted has a guide frame having one lower portion of the support frame 36 installed at a predetermined height in a direction perpendicular to the conveying direction of the belt 42 ( 44 is slidably installed on the roller 48 through the roller 48, and the other end of the support frame 36 has a rodless type pneumatic cylinder whose lower end is installed in a direction perpendicular to the conveying direction of the belt in parallel with the guide frame 44. It is fixed to the piston built in (50).

In this case, the guide frame 44 and the pneumatic cylinder 50 are fixedly installed on the support frame 38 of the belt press type dehydrator, respectively, and the rodless type pneumatic cylinder 50 is a cable type, a band type, or a slide. Any type of configuration is possible by one skilled in the art.

In addition, the injection nozzle 40 is a water pump (P) 56 for supplying the washing water at a high pressure through the nozzle pipe 52 and the flexible hose 54 of a predetermined length fixed to both sides to the support frame 36 Connected with

On both sides of the pneumatic cylinder 50, a pair of limit switches 58 and 60 and a pair of flow control valves 62 and 64 for detecting the approach of the injection head unit 46 are provided, respectively. The outputs of the switches 58 and 60 and the flow control valves 62 and 64 are connected to the solenoid 66, which is connected to the compressor 70 via the air unit 68.

On the other hand, the four sides of the spray head unit 46 adopts a double sealing structure to prevent the washing water sprayed from the spray nozzle 40 from spreading out of the belt 42. That is, the first sealing member installed inside is formed of a urethane pad having excellent chemical resistance and abrasion resistance, and the second sealing member 72 installed on the outside has a brush in which the lower end is in contact with the belt 42. 74 and a rectangular blocking box 76 supporting the brush 74 and having an upper side fixed to the lower side of the support frame 36.

The operation of the pneumatic belt cleaning device according to the first embodiment of the present invention configured as described above will be described in detail below.

First, when the air is compressed and supplied by operating the air compressor 70, the air unit 68 increases the pressure of the air by 5-7. Of To the solenoid valve (66).

When the high pressure water pump 56 is operated to turn on the solenoid valve 66 when the washing water is injected through the injection nozzle 40, for example, when the limit switch 58 is ON. The head unit 46 is set to advance in the right direction.

Accordingly, when the injection head unit 46 moves in the right direction along the guide frame 44, the sealing brush 74 first stimulates the contaminated portion of the belt 42 to be easily pre-treated and removed by washing water. The residual cake is desorbed by high pressure washing water spray.

In this case, the present invention utilizes water purification lines, such as industrial water, without additional water supply. 100-200 by pumping flow rate per minute Of The injection head unit 46 is driven left / right at a speed of 10-50 m / min (3 m belt width reference) to the front surface of the belt 42 moving at a speed of 1.5 m / min while spraying at an injection pressure of.

Then, when the injection head unit 46 is close to the left end of the pneumatic cylinder 50, the limit switch 60 detects this and outputs a signal to the solenoid valve 66. Accordingly, the solenoid valve 66 is set opposite to the above to move the injection head unit 46 to the left direction.

In this case, the moving speed of the injection head unit 46 can be controlled by controlling the flow control valves 62 and 64 to vary the air amount.

Meanwhile, the sprayed washing water may prevent the washing water sprayed by the double first and second sealing members 72 from splashing out of the dehydrator and the washing water is drained downward through the surface of the washed filter cloth.

In the case of using the belt washing device of the present invention as described above, the washing pressure is 5 compared with the conventional fixed washing device. Of 100-200 Of Increased above, the flow rate of the dehydrator is 30 0.9 to / hr / hr (3m standard), the flow rate is 1/33, the pressure is 1 / 20-1 / 40 can be operated.

As a result, dehydration efficiency can be increased and cost can be reduced.

Meanwhile, FIG. 6 is a plan view showing a mechanical belt cleaning device according to a second preferred embodiment of the present invention, and FIG. 7 is a front view of the mechanical belt cleaning device of FIG.

6 and 7, the mechanical belt cleaning device according to the second embodiment of the present invention is similar to the first embodiment, the injection head unit 80 is equipped with a single injection nozzle 40 is a support frame Two pairs of ball bush guides 88A-88D fixedly installed on both lower sides of the 86 and having a plurality of balls therein installed at a predetermined height in a direction perpendicular to the conveying direction of the belt 42 are provided. Coupled with (82, 84) is installed to be movable in the left / right direction according to the rotational movement of the ball screw (82, 84). In this case, one ball bush guide coupled to the ball screws 82 and 84 may be installed.

In this case, both ends of the ball screws 82 and 84 are fixedly installed on the support frame 38 of the belt press-type dehydrator and rotatably supported by support brackets 90A-90D having bearings therein.

Bevel gears 92A and 92B are integrally formed at one end of each of the ball screws 82 and 84 so as to change the direction of rotational power, and the bevel gears 92A and 92B are formed in both shafts. The drive motor 96 in which the bevel gears 94A and 94B are formed in the edge part is connected. In addition, the drive motor 96 may use an inverter motor or a servo motor which is advantageous for continuous rotation control, and it is preferable to install bushes 98A and 98B between the drive motor and the bevel gears 94A and 94B to hold the rotating shafts, respectively. desirable.

In addition, a pair of limit switches 58 and 60 are provided inside the support frame 38 to detect the approach of the injection head unit 80, respectively.

On the other hand, the injection nozzle 40 is a water for supplying the washing water at a high pressure through the nozzle pipe 52 and the flexible hose 54 of a predetermined length fixed to both sides to the support frame 36, similar to the first embodiment It is connected to the pump (P) 56.

In addition, four sides of the spray head unit 80 adopt a double sealing structure to prevent the washing water sprayed from the spray nozzle 40 from spreading out of the belt 42. That is, the first sealing member installed inside is formed of a urethane pad having excellent chemical resistance and abrasion resistance, and the second sealing member 72 installed on the outside has a brush in which the lower end is in contact with the belt 42. 74 and a rectangular blocking box 76 supporting the brush 74 and having an upper side fixed to the lower side of the support frame 36.

The operation of the mechanical belt cleaning device according to the second embodiment of the present invention configured as described above will be described in detail below.

First, when the driving motor 96 is operated, the rotational force is transmitted to the ball screws 82 and 84 through the bevel gears 92A, 92B, 90A, and 90B so that the ball screw rotates. The fixed ball bush guides 88A-88D are linearly moved to move in a direction perpendicular to the advancing direction of the belt.

Subsequently, when the high pressure water pump 56 is operated to start spraying the washing water through the spray nozzle 40, the spray head unit 80 is continuously washed while moving on the contaminated filter cloth by the same principle as in the first embodiment. Run

When the injection head unit 80 moves to the right and detects that the right limit switch 60 is in proximity, a detection signal is supplied to a control unit (not shown) of the driving motor 96 to determine the rotation direction of the driving motor 96. The control signal is generated to be in the opposite direction.

As described above, when the spraying head unit 80 sprays the washing water while moving left / right, the spraying water sprayed by the first and second sealing members prevents the washing water from splashing to the outside.

Meanwhile, in the second embodiment, the traveling speed of the injection head unit 86 may be adjusted remotely by the controller of the inverter or the servo motor in association with the width and the traveling speed of the belt 42.

In the above-described second embodiment, an example of the ball screw method for driving the left / right of the injection head unit 86 is shown. In addition to the driving method, L.M. It can also be carried out by a guide system, and any structure can be adopted as long as the structure can perform a linear reciprocating motion.

Also in the case of the second embodiment described above, similarly to the case of the first embodiment, since the spray head having a single injection nozzle is continuously moved to clean the contaminated belt, various effects are obtained similarly to the first embodiment.

Meanwhile, in the above example of the present invention, an example having a single injection head is given, but depending on the moving speed and the belt width of the belt, two to three injection nozzles are mounted on the movable head to wash the contaminated belt twice. It is also possible to increase the degree of cleaning.

As described above, in the present invention, since the injection head provided with one injection nozzle is a method of cleaning the contaminated belt while sliding reciprocating in a direction perpendicular to the moving direction of the belt, the nozzle may be used even though a water pump of low pressure is used. The injection pressure sprayed through is greatly increased so that a small amount of washing water can be used for perfect cleaning. As a result, dehydration efficiency can be increased and cost can be reduced.

In the above, the present invention has been illustrated and described by way of specific preferred embodiments, but the present invention is not limited to the above-described embodiments and the general knowledge in the art to which the present invention belongs without departing from the spirit of the present invention. Various changes and modifications can be made by those who have

Claims (10)

In the belt cleaning device of the double belt press type dehydrator, a pair of guide guides arranged at a predetermined interval on the upper side of the belt in a direction orthogonal to the conveying direction of the contaminated belt made of filter cloth, and the lower side slides on the guide guides. A movable injection head means for spraying the washing water of a predetermined pressure supplied from a washing water source to the contaminated belt through a spray nozzle; and detecting that the movable spray head means is adjacent to both sides of the belt. A pair of return signal generating means for generating a second return signal, and a head for reciprocating the movable injection head means along the guide guide by reversing a driving direction each time the first and second return signals are detected; Belt washing apparatus characterized in that the drive means. The belt cleaning apparatus according to claim 1, wherein the head driving means is pneumatic. According to claim 2, wherein the one guide guide is composed of a pneumatic cylinder fixed to the movable piston, one side of the injection head means is applied to the pneumatic cylinder in response to the first or second return signal Belt washing apparatus further comprises a control valve for switching the application direction of the pneumatic pressure. The belt cleaning device according to claim 1, wherein the head driving means is mechanical. According to claim 4, wherein the pair of guide guide is composed of a ball screw, the head driving means is fixed to the lower side of the injection head means at least a pair of balls for converting the rotational movement of the ball screw to linear movement And a bush guide, a drive motor for generating rotational power, and a pair of power transmission means for transmitting the rotational power to the ball screw. 6. A belt cleaning apparatus according to any one of claims 1 to 5, wherein the spray head means comprises a single spray nozzle. The belt washing according to any one of claims 1 to 5, further comprising a water splash blocking means installed at an outer surface of the spray head means to block the sprayed washing water from jumping out of the belt. Device. The brush of claim 7, wherein the water splash blocking means is installed at an inner side, and is formed at a first sealing member made of a chemical and abrasion resistant material, and is installed at an outer surface of the first sealing member and is in contact with the belt at a lower end thereof. Belt washing apparatus, characterized in that consisting of a second sealing member having. The belt washing apparatus according to claim 3, further comprising a moving speed adjusting means for adjusting the moving speed of the spray head means by adjusting the pneumatic pressure applied to the pneumatic cylinder. According to claim 1, wherein the injection nozzle is a belt cleaning device, characterized in that composed of at least two injection nozzles are sprayed in the same direction or perpendicular to the head moving direction.