JPS6042490A - Method and apparatus for measurement of ash deposition rate in coal slurry - Google Patents

Abstract

PURPOSE:To detect deposition of ash in a coal slurry and measure the rate of deposition readily, by rotating a test disc in the coal slurry, washing off coal slurry deposited on it and weighing the disc to determine gain of its weight. CONSTITUTION:A test container 12 is brought down by means of a lifter 13. Coal slurry to be tested 14 is poured into the container 12 and heated to a predetermined temp. by means of a ribbon heater 16. The container 12 is raised by the lifter 13 and a test disc 10 attached to the lower end of a rotating shaft 4 is immersed in the coal slurry 14. The test disc 10 is revolved at a predetermined speed for a predetermined time. Then the coal slurry is discharged through a pipe 18 and coal slurry is removed from the disc by washing. The disc 10 is dismounted and is weighed for measurement of amount of deposited ash. The rate of ash deposition is calculated on the basis of the measured value.

Description

[Detailed Description of the Invention] When a coal slurry production equipment is in operation, ash contained in the coal slurry adheres to various equipment and causes problems such as clogging, but the present invention provides a method and apparatus for investigating the cause of ash adhesion. has not been developed yet.

The present invention was proposed in view of the above circumstances, and involves heating a coal slurry with an arbitrary moisture concentration in a test container, and rotating a test disk immersed in the coal slurry for an arbitrary period of time. , a method for measuring the adhesion rate of ash in coal slurry, which is characterized in that the coal slurry adhering to the disk is washed and removed and the disk is weighed and measured. The object of the present invention is to provide a new and useful method for measuring the deposition rate of ash in coal slurry, which allows the deposition rate of ash in coal slurry to be easily measured.

In the present invention, as described above, by heating a coal slurry IJf of an arbitrary moisture concentration contained in a test container and rotating a test disk immersed in the same coal slurry for an arbitrary period of time, the same disk is heated. Coal slurry was allowed to adhere uniformly in a test container in which the ash content was evenly distributed, and then the coal slurry adhering to the disk was washed and removed, and the weight of the disk was measured, and the ash adhered to the disk was removed. The adhesion speed of ash in the coal slurry can be determined by the amount.

As described above, according to the present invention, it is possible to measure the adhesion phenomenon and adhesion rate of ash in a small amount of sample coal slurry using a simple structure and simple operation. Furthermore, by changing the material of the test disk, it becomes possible to measure the ash deposition rate according to various materials.

Therefore, by measuring the adhesion rate of ash in coal slurry according to the present invention, it is possible to predict performance degradation and blockage of equipment such as stirrers, control valves, pumps, heat transfer tubes, and piping in coal slurry production equipment, as well as piping. Furthermore, the ash adhesion rate of coal slurries of different coal types, particle sizes, and moisture concentrations can be measured to be useful for selection of coal slurry types and quality control.

The present invention also provides a test vessel filled with coal slug IJQ,
a test disk placed in the test container via rotating means;
An apparatus for measuring the deposition rate of ash in coal slurry, characterized in that it is comprised of a heating means disposed in the test vessel and a moisture concentration adjustment means for the coal slurry disposed in the test vessel. This allows the above method to be carried out smoothly.

The present invention will be described below with reference to the illustrated embodiments.

(1) is the device mount, (2) is the rotation control mechanism built into the mount (1), (3) is the electric motor connected to the rotation control mechanism (2), and (4) is the mount (1). through the bearing (5
α) (5h) with a vertical rotating shaft rotatably supported,
A bolt (8) is spanned between each of the boots 1061f mounted on the upper end of the rotating shaft (4) and the drive shaft of the electric motor (3), respectively. In the figure, (9) is a joint. Further, a test disk 00) is fixed to the lower end of the rotating shaft (4) via a bolt (11).

(12) is, for example, a cylindrical steel test container, and the test disk GO)'! It is supported on the base of a pedestal (li) via a table lifter (13) so as to be freely retractable, and the test container a2 is filled with a sample of coal slurry.

(15) is a test container lid divided into semicircles, (IIEI
On is a ribbon heater for heating the test container, which is disposed outside the test container 02 and is equipped with a temperature controller (not shown).
Thermocouple for temperature control, θ block coal slurry discharge pipe, wholesale pipe (1 suddenly inserted valve, (4) is heat insulating material layered on the outside of test vessel O3, 21) is coal slurry discharge pipe. A water injection pipe for adjusting the water concentration, @ is a pulp inserted in the interpipe Qυ, (231 is a table lifter operation handle).

When measuring the deposition rate of ash in coal slurry using the measuring device shown in the figure, four weighed test disks QQ are attached to the lower end of the rotating shaft (4), while the table lifter (1
At the lowered position of 3), the sample coal slurry is placed in the zero pressure test container 021, the water concentration of the same coal slurry α is adjusted, and the sample coal slurry (1) is heated by the ribbon heater 06).

After the coal slurry IJ (14) has been heated to an arbitrary temperature, the test disk 0 is moved to the center of the test container (1) using the table lifter α3 so that the test disk 0
■Raises.

Activate the electric motor (3) to drive and rotate the test disk 00 at the following temperature, stop the rotation after a certain period of time, and if necessary, pour the 7290 tons of sample coal in the test container (1 chamber) into the discharge pipe. O
Discharge from Q and lift the test container (
11) is lowered to remove 90 coal particles adhering to the test disk (10) by washing with a solvent.

Next, the test disk (+n)'v is removed from the rotating shaft (4), the weight is placed on the needle side, and the speed of adhesion of the ash is calculated from the amount of ash adhering to the test disk θ0).

As described above, according to the method of the embodiment, it is possible to measure the ash adhesion phenomenon and the adhesion rate using the sample coal slurry with a simple configuration and simple operation. Furthermore, by changing the material of the test disk (101), it is possible to measure the ash deposition rate according to the material of each disk.

FIG. 2 shows the results of measuring the relationship between the moisture concentration contained in the coal slurry and the ash adhesion using the measuring device described above.

The measurement was carried out using a stainless steel test disk (60 momme-mφ).
In coal slurry heated to 70C, rotation speed 1.00O
The test disk was rotated at r, p, m, and the amount of ash attached to the test disk was measured. Note that the rotation time can be set arbitrarily.

In Figure 2, the adhesion of ash is the coal slurry moisture concentration of 3 to 4.
It is observed that a large amount of water adheres in the water concentration range, and that the amount of water adhered decreases at moisture concentrations around that range.

Although not shown in the data, when comparing the amount of ash adhesion between Work Earth coal slurry and Neelan coal slurry, it has been confirmed that Work Earth coal is difficult to adhere to (while Neelan coal is easy to adhere to).

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments (the present invention may be modified in various ways without departing from the spirit of the present invention). It is.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the coal slurry ash adhesion rate measuring device according to the present invention, and FIG. 2 is a chart showing the measurement results by the same measuring device. (3)...Electric motor (4)...Rotating shaft (61 (71)
...Pulley (8)...Belt (10)...Test disc (+3...Test container (1a)...Test coal slurry (16)...Ribbon heater CD... Water injection pipe sub-agent Patent attorney Shigemon Okamoto, 6 others Fig. 1 705- Fig. 2 Minutes for coal slurry

Claims (2)

[Claims] (1) While heating the coal slurry at a desired moisture concentration in the test container, a test disk immersed in the coal slurry was rotated for a desired period of time, and then the coal slurry adhering to the disk was washed and removed. A method for measuring the deposition rate of ash in a coal slurry, characterized by weighing and measuring the same disk. (2) A test container filled with coal slurry, a test disk installed in the test container via a rotating means, a heating means installed in the test container, and a test disk installed in the test container. 1. A device for measuring the deposition rate of ash in coal slurry, comprising means for adjusting the water concentration of coal slurry.