JP3926017B2 - Non-fluidity zone sampling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is a non-flowable strip (such as a dehydrated cake) that is continuously discharged from a discharge section of a sludge dewatering machine such as a belt press type in a wide plate shape. The present invention relates to a sampling device for a non-fluid zone that obtains a plurality of thin sample strips by cutting and cutting a predetermined amount of a region in a predetermined width direction.
[0002]
[Prior art]
For example, in a sewage treatment facility, sewage is purified and discharged through precipitation treatment, aeration treatment, biological treatment, coagulation treatment, etc., but a large amount of sludge is generated at that time. This sludge is dehydrated by a sludge dewatering machine such as a belt press type to form a dehydrated cake and incinerated. If the moisture content of the dehydrated cake is high, the fuel cost for incineration will increase. Moreover, in order to reduce the moisture content of the dewatered cake, it is necessary to add a large amount of chemicals such as a flocculant to the sludge supplied to the sludge dehydrator, which increases the chemical cost. For this reason, in order to minimize the total cost of fuel for incineration and the cost of chemicals added to sludge, it is necessary to adjust the amount of chemicals added and maintain the moisture content of the dehydrated cake at a predetermined value. It is.
[0003]
Conventionally, a part of the dewatered cake discharged from the discharge section of the sludge dewatering machine has been manually collected for a predetermined amount. Then, the collected sample is weighed, and then the weighed sample is heated by infrared rays and dried. The dried sample is weighed, and the weight of the sample before drying and the weight of the sample after drying are determined. The moisture content was calculated. The above-described weighing of the collected sample, subsequent drying, weighing after drying, and calculation of moisture content can be automatically performed by an automatic infrared heating and drying moisture meter (trade name: Cricket Auto).
[0004]
[Problems to be solved by the invention]
Sewage treatment at the sewage treatment facility and operation of the sludge dewatering machine are carried out 24 hours a day. Therefore, collection of the sample of the dewatered cake discharged from the discharge section of the sludge dewatering machine has to be carried out with the sludge dewatering machine for 24 hours by changing several workers, which is very troublesome. .
[0005]
[Means for Solving the Problems]
The present invention eliminates the above-mentioned problems by saving labor by automatically collecting and distributing a part of a non-flowable zone such as sampling of a dehydrated cake by a machine. A comb-shaped fixed blade having a plurality of comb teeth provided opposite to the non-flowable band that hangs down and continuously discharged, and an axial interval between the rotation axis parallel to the width of the non-flowable band The rotation trajectory of the blade tips at both ends passes through the adjacent interval between the comb teeth of the comb-shaped fixed blade, and a part of the width of the non-fluid band is pushed into the adjacent interval between the comb teeth of the comb-shaped fixed blade. A rotary cutting blade consisting of a plurality of strip plates that are scraped off while cutting into a plurality of thin sample strips, and a sample strip that is scraped off while the comb-shaped fixed blade and the rotary cutting blade are cut from the non-fluid band And a transfer means for transferring.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 and 3 are endless upper and lower filter cloth belts having a width of about 3 m, which is a belt press type sludge dewatering machine that dewaters with sludge sandwiched from above and below, and the upper filter cloth belt 1 is directed upward around the return roll 2 at the final stage. The lower filter cloth belt 3 is turned down around the return roll 4 in the final stage, and proceeds toward the sludge supply section. A dewatered cake discharge portion 5 is formed by the two filter cloth belts that are turned around each return roll of the final stage, and the dewatered cake 7 peeled off by the scraper blade 6 is wide from the filter cloth belt 3 below the discharge portion 5. It hangs down in a plate shape and is continuously discharged.
[0007]
Reference numeral 10 denotes a comb-shaped fixed blade in which a plurality of comb teeth having a diagonally downward slope at the upper end are arranged at a predetermined interval. The comb-shaped fixed blade 10 is arranged to face the dewatering cake 7 that is hung down and discharged in a wide plate shape. A portion 7 'of the width of the dewatered cake discharged in this way is guided to the front by a slanting downward slope of a plurality of comb teeth, and the dewatered cake is cut into a plurality of thin sample strips in cooperation with a rotary cutting blade described later. . In the illustrated embodiment, the comb fixed blade, Ho Isuzu left two outer comb teeth 11a of the triangle, and 11a, the comb assembly 12 having four intermediate comb teeth 11b which are arranged at equal intervals ... The comb-teeth coupling body 12 is fixed between the two outer comb teeth 11a and 11a, the downwardly inclined surfaces 11 'of the six comb teeth are aligned, and the two outer comb teeth 11a and 11a, The same distance as the distance between the intermediate comb teeth is also maintained between the outer intermediate comb teeth.
[0008]
The angle α of each comb tooth with respect to the oblique downward slope 11 ′ is about 22 °, the length of the slope is about 100 mm, the thickness of each comb tooth is about 3 mm, and the interval between the comb teeth is about 20 mm. The width of the comb-shaped fixed blade 10 between the comb teeth is about 120 mm, and a part 7 ′ of the width of the dewatered cake 7 discharged at a width of about 3 m is thin with a width of about 20 mm in cooperation with the rotary cutting blade. Cut into 5 sample strips.
[0009]
Each of the outer comb teeth 11a, 11a extends downward from the comb coupling body 12, and includes a leg 13 that is once inclined to the outside and then drops again. The lower end of the leg 13 is wider than the comb-shaped fixed blade 10. Is fixed to the rear ends of the left and right support frames 16 of an endless belt conveyor 15 as a wide transfer means 14 and straddles the conveyor. In order to allow the vertical surface 11 ″ opposite to the slope 11 ′ of each comb tooth 11 a, 11 b to be in close contact with the front surface of the scraper blade 6, the legs 13, 13 are provided with long holes 13 ′. The legs 13 and 13 are fixed to the left and right support frames of the conveyor with bolts passed through the long holes.
[0010]
On the inner side of the left and right support frames 16 and 16 of the conveyor, a crank-shaped cross section is provided with a plurality of left and right partition plates 17 and 17 whose lower ends are close to the upper surface of the belt conveyor 15 over the entire length of the frame. It is attached via auxiliary materials 18 and 18. The interval between the partition plates 17 and 17 is equal to or slightly wider than the width of the comb-shaped fixed blade 10. 19 and 20 and between the front ends of the support frame 16 for tensioning the Berutokon bare-15, before and after the pulley pivotally mounted between the rear end, M1 is under certain reduction gear motor, motor M1 rotates the-pulleys 20 Then, the sample band cut from the dewatered cake is conveyed from the back to the front by the belt conveyor 15 and dropped onto the sample carrying belt conveyor 21 arranged orthogonally below the front end, for example.
[0011]
A pedestal 22 is fixed on the front part of the left and right partition plates 17 and 17 of the conveyor, and two rearward support arms 23 and 23 are fixed in parallel to the pedestal, and between the rear ends of the support arms 23 and 23. Includes a rotation shaft 25 of a rotary cutting blade 24 parallel to the width of the non-fluid belt, and a motor M2 with a speed reducer placed on a pedestal 22 is provided along one end of a support arm 23 with endless chain conduction. The rotary shaft 25 is driven to rotate in the direction of arrow a in FIGS.
[0012]
The rotary cutting blade 24 is composed of a plurality of strips 26 having blades at both ends and attached to the rotary shaft 25 at intervals in the axial direction. The number of strips is adjacent to the comb teeth of the comb-shaped fixed blade. According to the number of intervals, the rotational trajectory of the blade at each end of each strip 26 passes through the adjacent interval addressed to one of the comb teeth. In the illustrated embodiment, since there are five adjacent intervals between comb teeth, the rotary cutting blade is composed of five strips.
[0013]
And if all the strips are attached at the same angle with respect to the rotation axis and aligned in a straight line, or attached at a phase angle of 90 °, the blade rotates and passes through the adjacent gaps of the comb teeth so that it is non-flowable. a band when performing cutting while pushing the adjacent gaps of the comb teeth, between rotary cut blade for each rotation 180 °, or with great shock each time the 45 ° rotation, the cutting sample band strip or adhere to, or shape is too large cut sample piece, becomes unstable occurs a variation in size. For this reason, the plurality of strip plates constituting the rotary cutting blade are attached to the rotary shaft at equal phase angles in the circumferential direction. For example, in the case where there are five strips 26 as shown in the drawing, the blade is attached to the rotary shaft 25 at a phase angle of 36 °, and the blade at one end of any one strip in turn is comb-toothed each time it rotates 36 °. Cut through one interval.
[0014]
For example, the cross-sectional shape of the rotary shaft 25 and the central hole between both ends of the belt plate 26 are made pentagonal, and the hole of the belt plate addressed to one sheet is fitted on the rotary shaft 25 with a phase angle of 36 °. In addition, a collar may be fitted to the rotary shaft 25 so as to be positioned between the strips, and an axial interval corresponding to the interval of the comb teeth may be maintained between the strips.
[0015]
When a sludge dewatering machine is operated and a wide non-flowing zone such as a dewatering cake 7 is peeled off from the discharge part 5 with the spray pad blade 6 and continuously discharged, a part 7 'of the width of the non-flowing zone is comb-shaped. The plurality of comb teeth 11a and 11b of the fixed blade 10 are guided to the front by inclined surfaces 11 ′. Then, by driving the motors M1 and M2 with reduction gears, the one end and the other end of the plurality of strip plates 26 of the rotary cutting blade 24 driven to rotate by the motor M2 are all of the comb teeth 11a and 11b. Passing through adjacent intervals in order, pressing the non-flowable band toward the adjacent interval of the comb teeth at that time, causing the comb teeth 11a and 11b to be cut by the pressing force, part of the width of the non-flowable band 7 'is made into a plurality of thin sample bands, and at the same time, the thin plurality of thin sample bands are removed at intervals between the partition plates 17 and 17 of the belt conveyor 15 and placed on the upper surface of the belt conveyor.
[0016]
The blades at both ends of the plurality of strip plates 26 constituting the rotary cutting blade have no protrusions and are not caught. By making the blade 26a at one end of the band plate 26 a sharp oblique blade, the blade 26a tears the non-flowable band when passing through the interval of the comb teeth, and the blade 26b at the other end is made to have the thickness of the band plate. By using a semicircular blade of the eyelash, it acts to crush the non-flowing band when it passes through the interval of the comb teeth, so that even if there is hair etc. in the cut part of the non-flowing band, Even if it is prevented and entangled, it becomes easy to come off. Note that both ends of the belt plate 26 may be semicircular blades.
[0017]
Thus, the plurality of sample bands of the non-fluid belt that have fallen on the upper surface of the belt conveyor 15 from the interval between the partition plates 17 and 17 are carried forward by the belt conveyor and fall to the sample carry-out conveyor 21 and automatically run by the conveyor. It supplies to an infrared heating moisture meter, calculates | requires by calculating | requiring a moisture content, and automatically adjusts the addition amount of the coagulant | flocculant etc. to the sludge supplied to a sludge dehydrator based on the moisture content.
[0018]
As shown in FIG. 1 and FIG. 4, both sides of the width 7 ′ of the non-fluid belt such as a dewatered cake, which are guided forward by the slopes of the comb teeth of the comb-shaped fixed blade 10, are the outer comb 11a, sliding outward slope 13a on which is provided in the middle of the leg 13 extending downwardly of 11a, may fall on the conveyor because it is directed out of the left and right frames 16, 16 of the conveyor 15 Absent. Therefore, only the partial width 7 'of the non-flowable zone can be accurately sampled.
[0019]
The water content of the dewatered cake 7 that hangs down from the discharge part 5 of the sludge dewatering machine into a wide plate shape is small in the central part, large in both right and left ears, and is not constant in the width direction. Accordingly, in order to make the sample band cut by the comb-shaped fixed blade 10 have an average moisture content of the entire width of the dehydrated cake, the left or right side that divides the width W (about 3 m) of the dehydrated cake 7 into approximately four equal parts. It is preferable to cut the dewatered cake 7 with the above-mentioned width of 120 mm with the comb-shaped fixed blade 10 around the line.
[0020]
As described above, the embodiment of the present invention has been described with respect to sampling from a dehydrated cake having a high water content.However, the present invention is not limited to this, and sampling and distribution from non-flowable bands having a high water content such as food and paper are not limited thereto. Can also be used.
[Brief description of the drawings]
FIG. 1A is a schematic perspective view of a part of an embodiment of a sampling device according to the present invention, and FIG. 1B is a perspective view of a comb-shaped fixed blade and a rotary cutting blade.
FIG. 2 is a side view of a part of FIG.
FIG. 3 is a plan view of FIG.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
[Explanation of symbols]
5 Dewatering cake discharging part 7 Dewatering cake (non-flowable zone)
7 'Dehydrated cake sample and partial width to be collected 10 Comb fixed blade 11a Outer comb tooth 11b Intermediate comb tooth 11' Slope downward slope 14 of comb tooth Transfer means 15 Belt conveyor 24 Rotary cutting blade 25 Rotary cutting blade Rotating shaft 26 Rotating cutting blade strips 26a, 26b Blades at both ends of the strip plate

Claims (3)

  A comb-shaped fixed blade having a plurality of comb teeth provided facing a non-flowable band that hangs down into a wide plate and is continuously discharged; and a rotation axis parallel to the width of the non-flowable band It is attached at intervals in the direction, the rotation trajectory of the blade edges at both ends passes through the adjacent interval of the comb teeth of the comb-shaped fixed blade, and a part of the width of the non-fluid band is adjacent to the comb teeth of the comb-shaped fixed blade. A rotary cutting blade consisting of a plurality of strip plates scraped while being cut into a plurality of thin sample bands while pushing into the interval, and the comb-shaped fixed blade and the rotary cutting blade are scraped off while cutting from the non-fluid band. A sampling device for a non-flowable zone, comprising a transfer means for transferring a sample zone. 2. The non-fluidity band sampling apparatus according to claim 1, wherein the plurality of strips of the rotary cutting blade are attached to the rotary shaft at equiangular phase angles in the circumferential direction. Band sampling device. In the sampling device of the non-flowable strip of claim 1 or claim 2, rotary cut blade of the plurality of the strip opposite ends of the cutting edge of the one is a sharp knife-like, it other is round blade semicircular Non-fluidity zone sampling device characterized by

Images