JPS6021404A - Drum-index measuring apparatus - Google Patents

Abstract

PURPOSE:To automate the measurement of a drum index, by applying a means, which can simultaneously obtain the size and weight of coke by using X rays. CONSTITUTION:X rays are utilized in a configuration and weight measuring device 8, which can measure the size and weight of sample coke that is being conveyed by a belt conveyer 7. The device 8, conveying means such as various belt conveyers, 2, 6, 7, 10, 11, 16, and 18, aligning device 5, a selecting mechanism 9, and the like are combined, and the drum index of a drum 15 is measured based on the measuring method specified by JIS. In this way, all the measuring and testing processes are performed continuously and automatically. A microcomputer 19 performs the operating process of the device 8 and the command and control with respect to various conveying means and the like. Thus, the measurement of the drum index can be automated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic coke drum index measuring device.

The drum index is an index that indicates the strength of coke. The method for measuring the drum index is specified in the Japanese Industrial Standards and is as follows. That is, take 2 out of 50 samples from the trowel to be measured, determine their particle size distribution, prepare 10kg each of particles with the same particle size distribution, and put the 10kg samples into a rotating drum. The drum index is determined based on the particle size distribution before and after rotation in the drum by rotating for a certain period of time and measuring the particle size distribution after rotation. Conventionally, when preparing drum index using such a method, there are various steps such as sieving using a sieve, measuring the weight of each particle size using a weighing machine, and rotating the drum after placing the sample in the drum. Most of the work was done manually, which required a lot of manpower and was inefficient.

In addition, since the hj6 is used, the measurement accuracy decreases due to destruction of the sample by something unrelated to the measurement, i.e., other than rotating it in the drum.Furthermore, the measurement must be carried out in a bad working environment due to the scattering of dust, etc. There was also.

The present invention makes it possible to carry out each work process continuously and automatically by applying a shape and weight measuring means that can simultaneously measure the size (minimum diameter of the coke) and weight using X-rays. The object of the present invention is to provide an extremely efficient and highly accurate drum index measuring device.

EMBODIMENT OF THE INVENTION The detailed content of the drumintics measuring device of this invention is demonstrated based on one Example shown below. The present invention
By applying a measuring means developed by the inventor of the present invention that uses X-rays to simultaneously obtain appearance information such as the shape and size of lumps (coke, etc.) and weight, the drum index can be measured. This enables continuous automatic measurement.

Therefore, before explaining the overall configuration of the apparatus of the present invention, an example of the measuring means described above will be briefly explained.

FIG. 2 is a diagram showing the configuration of the means for measuring the lumps, and shows 21
23 is an X-ray generator, 23 is a belt conveyor, 24 is a lump object to be measured, 25 is an X-ray linear sensor, 26 is an analog processor, and these are the X1lil leak protection container 22
covered with. Among these, X-ray linear sensor 2
5 is a large number of minute X-ray detection elements 25a, +25b...
・ are arranged in a row in a direction perpendicular to the moving direction of the conveyor (for example, 200 X-ray detection elements with a pitch of 1 mm are arranged in one row)
The analog processor 26 is for amplifying the output signal from each element of the XIJ linear sensor 25, log-converting it, and further performing log-conversion.

In such a configuration, when the mass to be measured 24 is transported by the belt conveyor 23 and passes under the X-ray generator 21, it is irradiated with X-rays. The X-rays that have passed through the irradiated mass are detected by the X-ray linear sensor 25. Here, the X-ray linear sensor 25 consists of a large number of X-ray detection elements 25a + 25b... arranged in one row, so the X-ray detection elements are The amount of incident X-rays is small, and the amount of X-rays that irradiates the lump and enters the X-ray detection element is small. Therefore, by setting a certain threshold value, it is possible to identify whether a lump exists or not based on whether the output signal from the X-ray linear sensor is thicker or smaller than this threshold value! l
Ru. Moreover, the X11 linear sensor has a large number of tiny
The X-ray detection elements are arranged in a line perpendicular to the moving direction of the belt conveyor, so when a lump passes over the XB linear sensor, the position of the lump is determined based on the output signal of each X-ray detection element. It is possible to recognize whether or not it exists. Furthermore, by extracting the output signal from the X-ray linear sensor at appropriate time intervals depending on the moving speed of the belt conveyor, it is also possible to identify the location of the lump in the moving direction of the belt conveyor. That is, since it is possible to identify all parts in the moving direction of the lump and in the direction perpendicular to it, the shape of the lump can be measured based on each X-ray detected by the near sensor 25 and the output signal from the element. The diameter of the lumps (
(including the shortest pincer diameter), etc.

At the same time, the weight of the lump can also be measured based on the value of the transmitted dose of X-rays corresponding to the shape information of the lump. That is, as is well known, the amount of transmitted X-ray radiation generally depends on the mass of the substance through which it passes. Now, we have calculated the amount of transmitted X-rays when there are no lumps on the belt conveyor. , the transmission dose when a lump is present, the mass of the substance is M1, the transmission constant is C, then the following relationship holds true.

I-I. exp(CM) Therefore, the mass M can be calculated as follows.

In this way, the method can be improved by integrating the amount of transmitted X-rays corresponding to all positions of the lump, and the weight of the lump can be taken into account by the amount of attenuation (IO/I) in the above formula.

As described above, the shortest diameter and weight of each lump of coke can be immediately determined by the appearance information and weight measurement means using X-rays and processing by a microcomputer, which are used in the present invention. Figure 1 shows the overall configuration of the coke drum index measuring device of the present invention. In this figure, 1 is an automatic sampler in which the drum index is measured. A predetermined amount (usually 50 Kz) is taken. 2 is a first belt conveyor for transporting the collected sample coke; 3 is a bar screen or mesh conveyor provided to cut sample coke of a predetermined size or smaller (usually 25 to 401 m or smaller); 4 is a dryer installed to reduce the water content in coke to 3% or less in accordance with Japanese Industrial Standards, 5 is an alignment device such as a spiral alignment device, and 6 and 7 are respective second . The purpose of the third belt conveyor is to ensure that the sample coke aligned by these belt conveyors is aligned at arbitrary intervals, and the second belt conveyor 6 is moved at a slow speed and the third belt conveyor 7 is fast (e.g. 1
500 to 960 ffli per second, thereby transferring the flow from the second belt conveyor 6 to the third belt conveyor 7.
Due to the time difference between the two when moving to the next step, the intervals between the sample courses become dog-like, for example, 10 to 24 cm apart. Reference numeral 8 denotes a shape/M amount measuring device placed in the middle of the third belt conveyor 7, and the device configured with the previously described X-ray source, X-ray linear sensor, etc. is used. 9 is a sorting mechanism for sorting according to the shortest diameter of the pincher based on the data measured by the shape/weight measuring device 8, for example, to obtain a constant particle size distribution; This is for returning the sample coke that has been sorted by the sorting mechanism 9 on the fifth belt conveyor to the aligning device 5 and returning it to the original line. 12 is a scale hopper, and there are three scale hoppers 12a and 12 of 10 kg each.
b, 12c. 13 is a belt conveyor or chute that transfers the sample in the scale hopper to the drum 15; the sample coke transferred thereby is inserted into the drum 15 through the moving chute 14; 016 is a packet conveyor that conveys the sample coke tested by the drum; 17 is a vibrating sieve.
Sample coke with a diameter smaller than InIn is removed and 10+n
Only the sample coke having a diameter of m or more is transferred by the sixth belt conveyor 18 to the weight of the particle size distribution in the shape and weight measuring device. 19 is a microcomputer that inputs and stores the output signal of the shape/weight measuring device 8, performs calculations, and also generates command signals; 120 is a microcomputer;
This is a controller that drives and controls each belt conveyor based on the instructions of the controller.

Next, the operation of the automatic drum index measuring device of the present invention having the above-mentioned structure will be explained. First, automatic templater
1, sample 50 kg of sample coke.
Transfer to belt conveyor 2.

The sample coke transferred by belt conveyor 2 is
Items with a diameter of 25 to 40 mm or less are removed and dried by the bar screen 3, and then aligned and crushed by the sorting machine 5, and then transferred by the second belt conveyor 6 to the third
is transferred to belt conveyor 7. Here, as mentioned above, they are arranged at intervals of 10 to 24 CI11 and transported one by one, and each one passes through a shape and weight measuring device. At this time, the information on the shape and each amount of permeation dose of the coke are measured by the shape/weight measuring device, and the output signal is input to the microcomputer 19 and stored. Based on this signal, the microcomputer 19 calculates the shortest diameter and weight of each coke.Furthermore, based on the command from the microcomputer 19, the sorting mechanism 9 sorts the coke until the shortest diameter is 5Qmm. Only the above items are the fourth conveyor belt 1
0 and then returned to the alignment device 5 again by the fifth belt conveyor 11. The second one again. It is transferred by the third belt conveyor 6.7, and the shortest pinch diameter and weight are measured by the shape/weight measuring device 8. During this time, the particle size distribution (50 to 75 mm, 75 to 10
A three-stage distribution of 0.07 nm and 100 tnm or more is observed. Based on the second measurement data of each sample coke measured by the shape/weight measurement device 8 and the particle size distribution revised based on the first measurement data, 10 kg of the same particle size distribution as this particle size distribution was obtained. Each sample is sorted by a sorting mechanism 9. The sorted samples of 10 kg each are sent to scale hoppers 12 a + 12 b r
Rel introduced in 12C. Three scale hoppers 12a
, 12b112c one scale hopper 12
Open door a and shoot 10 kg of sample coke 13
The sample is introduced into the moving chute 14 and further inserted into the drum 15. The drum 15 is rotated 30 times at a rotational speed of 15±-rpM and then stopped. The tested sample coke in the drum 15 is sent by a packet conveyor 16, and particles with a particle size of 10 mm or less are removed by a vibrating sieve 17.
Only the dew and above are transferred by the sixth belt conveyor 18 to the other end of the third heald conveyor 7 (on the left in the drawing).

By operating the third belt conveyor 7 in the opposite direction, the sample coke passes through the shape/weight measuring device 8 again, and the shape and weight of each coke are measured. After all the sample coke has passed, the weight standard is determined. particle size distribution, i.e. 10-15mm, 15-25mm, 25-38fim
, 3.8 to 50 tnm, and particle size distribution based on the divisions of 50 mm or more are determined and stored in the microcomputer-19. The coke for which all measurements have been completed in this manner is transported by a return belt (not shown).

Based on the calculated particle size distribution, the weight of particles of 50 mm or more is
A+50 p 38 mm or more weight WA+38 +
The weight of 257 nm or more is WA+25115 mm or more.

When the weight of 10m++1 or more is W, +, O, 1 based on the coke of the sample in the scale hopper 12a.
The results of the second drum test were calculated by the microcomputer 7-19 based on the following DI value formula and recorded in 1. I'm crushed.

DI',': = WA-1-50/WAoX 100
DI: =WA+3s/ WAoX 100DL;,”
”” WA+25/WAoX 100D■:”==
WAl-15/WAOX 100 plus WAo is the total weight of coke before testing.

Here, when the total weight of the drum-tested coke is WAl, if the value calculated by the formula WAo-WA, /WAoX 100 is 1 or more, it is rejected.

Subsequently, a second test is performed using the sample coke from the scale hopper 12b through exactly the same processing steps as the sample coke from the scale hopper 12a. If the difference between the DI cost values of the first test result and the second test result is within the tolerance of JIS K 2151, then the average value of both values is used as the drum index. . If the difference between both values is greater than the tolerance, the first or second test fails (WAo-WA,
/WAO'×100 is 1 or more), a third drum test is performed using the sample coke in the scale hopper 12c in the same manner as the previous one. As a result of the above three tests, if the difference between the two values is within the tolerance of JISK2151, then the average value of both values can be used as the drum index.

Also, if it is outside the tolerance, it will be disqualified.

In the measuring apparatus of the present invention described above, the arrangement of the belt conveyors for transporting sample coke is not necessarily limited to that of the embodiment shown in FIG.

In other words, there is a means for arranging sample coke at certain intervals to ensure accurate measurement, a belt conveyor for transporting the aligned sample coke at a constant speed, and a shape of the sample coke being transferred by the belt conveyor.・Equipped with at least a device for measuring weight, a sorting mechanism used to sort sample coke with a minimum diameter of 50 mm or more, and a drum for testing, and the first test using a shape/weight measuring device. Of the sample coke that has been measured, the sample coke of 5 Qmm or more is sorted by the sorting mechanism into 10 kg units by the sorting mechanism so that the particle size distribution is equal to the predetermined particle size distribution for the second measurement. , transfer means are provided to transfer the samples to the belt conveyor in order to subject them to the drum test and then measure them again using the shape/weight measuring device. It is only necessary to combine the constituent elements such that all the steps necessary for the measurement of the drum index described above are passed.After the first measurement using the shape/weight measuring device mentioned above, the second measurement is carried out again. The sample coke is kept at intervals before it is transferred to the belt conveyor for the purpose of measuring the shape and weight of the sample coke, and at the stage before being transferred to the belt conveyor for the third measurement after the drum test. It is desirable to pass through the measuring device. For example, in the example shown in Figure 1, 5Qm after the first measurement
m or more sample coke is returned to the alignment device 5 and further Preferably, a third belt conveyor 6.7 is used.

As explained in detail above, the drum index measuring device of the present invention provides information necessary to measure the drum index using, for example, a shape/weight measuring device using X-rays while the sample coke is being transferred by a belt conveyor. Since data can be detected, by combining this with various transport means and sorting mechanisms, all measurement and test processes can be performed continuously and automatically through arithmetic processing and command control by a microcomputer. This makes it possible to perform extremely efficient and accurate measurements with almost no human intervention.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a drum index measuring device of the present invention, and FIG. 2 is a diagram showing an example of the shape/weight measuring device used in the present invention. 1.Automatic sampler, 2..1st belt conveyor, J..bar screen, 4..dryer, 5..
・Aligning device, 6...Second belt conveyor, 7...
3rd belt conveyor, 8. Shape/M-m measuring device, 9. Sorting mechanism, io, 11... 4th. Fifth belt conveyor, 12...Scale hopper, 13.1
4./knee 1.,] 5... tram, 16... 6th belt conveyor, 17... vibrating sieve, 18... belt conveyor, 19 microcomputer, 20...
...Controller () Applicant Kansai Thermal Chemical Co., Ltd. Agent Hiroshi Mukai

Claims (1)

[Claims] A sample coke alignment means, a belt conveyor for transferring the aligned sample coke at a constant speed, and a shape and weight measuring device for the sample coke being transferred by the belt conveyor;
The belt is equipped with a sorting mechanism for sorting samples after measurement by the shape and weight measuring device, a drum, and a microcomputer for processing data measured by the shape and weight measuring device and controlling each of the parts. Data regarding the shape and weight of each sample coke that is arranged and transferred by a conveyor is measured for the first time using the shape/weight measuring device and input into the microcomputer, and based on this first measurement data, While determining the particle size distribution of the sample coke, the sorting mechanism selects coke with a minimum diameter of a predetermined diameter or more and returns it to the belt conveyor, where a second measurement of shape weight data is carried out. Based on the second data, the sorting mechanism selects a small sample coke with the same particle size distribution as the first sample, introduces this small sample into the drum, tests it, and then transfers it to the belt conveyor. The drum index measurement device is configured to carry out a third measurement, and calculate a drum index by performing a predetermined calculation based on the data from the second and third measurements.