JPS5840111B2 - Equipment for removing deposits on the inner wall of rotary kiln - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for removing deposits on the inner wall surface of a rotary kiln, and more specifically, the present invention relates to a device for removing deposits on the inner wall surface of a rotary kiln. The present invention relates to a device for removing deposits on the inner wall surface of a rotary kiln, which can be operated continuously by removing ring-shaped deposits.

Traditionally, rotary kilns (hereinafter referred to as kilns)

During this operation, when the raw material charge reaches the reaction zone, a portion of it adheres little by little to the inner wall surface of the kiln, and this grows to form a so-called ring-shaped deposit.

When this ring-shaped deposit is formed, the steady flow of the raw material is blocked and continuous operation is hindered, so the ring-shaped deposit must be removed at regular intervals.

The ring-shaped deposits can be removed by manually or mechanically pushing down a stick with a pointed metal object on the tip, by shooting it off using a remittance gun, or by blowing it off with air. It is also removed using a hummer or the like.

However, with these methods, it is difficult to completely remove ring-shaped deposits, and it takes a lot of effort and time to completely remove them. As a result, the kiln has to be shut down, resulting in lower operating efficiency and lower quality.

In fact, when the kiln is temporarily stopped in this way, part of the kiln is opened and air enters, causing the temperature to drop, which causes changes in the raw materials or reactants in the kiln. As a result, operational performance is drastically reduced.

In particular, when producing granular lime nitrogen in a rotary kiln, the growth of ring-shaped deposits is significant, and the operation must be stopped frequently to remove them, making long-term continuous operation impossible.

Therefore, the present inventor analyzed and researched the growth phenomenon of ring-shaped deposits, and found that when producing granular lime nitrogen in a kiln, ring-shaped deposits grow attached to the inner wall surface, similar to powdered iron ore. However, in the case of lime nitrogen production, the inventors discovered that the adhesion resistant material was separated from the inner wall surface, and utilized this to complete the present invention.

Hereinafter, embodiments of the present invention will be mainly described with reference to the drawings, but the present invention is not necessarily limited to these embodiments.

1 and 2 are respectively a cross-sectional view and a longitudinal section of a rotary kiln having a removal device according to an embodiment of the present invention, and as shown in FIGS. 1 and 2, The rotary kiln consists of an iron shell 1 and lining bricks 2, and while the raw materials pass through this rotary kiln, a reaction progresses, and as time passes, deposits 3 grow.

Further, when the thickness of the deposit 3 increases due to the thickness of the deposit 3, a gap 1 is formed between the deposit 3 and the lining brick 2.

In other words, in the case of lime nitrogen production, the deposits grow, and as the thickness increases, the deposits themselves come into contact with each other, and while the temperature inside the kiln remains high, the brick 2
The inner surface temperature of the lining brick 2 decreases, a gap is created between the lining brick 2 and the deposit 3, and the deposit 3 is formed with the lining brick 2 also detached at least partially.

Therefore, in order to remove the deposits, a plurality of shearing members 4 are arranged along the longitudinal direction of the kiln, and each shearing member 4 is configured in a rod shape and is attached so as to protrude from the lining brick 3 in the radial direction. .

With this configuration, when the shearing member 4 is protruded and a part of the garment is sheared when forming the armor 3, at least a part of the armor is separated from the inner surface of the lining brick 2, so the part of the armor is sheared to maintain the link shape. Unable to do so, it collapses and is removed.

That is, as shown in FIG. 1, an edge portion 4a is formed at the tip of each shearing member 4, and at least two rods 5 are attached to the other end of the shearing member 4 having this configuration (see FIG. 2).

), each m member 4 is supported by these rods 5.

In order to secure the housing and each rod 5, a protective tube 6 is attached by passing through the iron skin 1 and the lining brick 2, and the rod 5 is passed through the protective tube 6.

In addition, the other end of the rod 5 is exposed outside the steel shell 1, and a spring 7 is provided at this portion, so that the shearing member 4 and the rod 5 are pulled into contact with the in-plane surface of the brick 2. Hold.

In addition, the height of each shearing member 4 is set to about 50 to 180mvt in order to easily cut the ring-shaped adherent material, and since it is exposed to a considerable high temperature inside the kiln, Preferably, it is constructed from heat-resistant steel.

Further, each shearing member 4 is connected to the lining brick 2 via a rod 5.
The shearing member 4 and the lining brick 2 have considerably different coefficients of thermal expansion.

For this reason, if each member 4 is configured to be too long, it becomes difficult to maintain each shearing member 4 in a state such that it contacts the inner surface of the lining brick 2 due to its deformation.

Therefore, it is preferable that each shearing member 4 is as short as possible.
Usually, it is sufficient to have a cutting width of 800 to 1,500,777, and to support this shearing member 4 with a pair of rods 5 spaced apart from each other by about 500 to 1,000 g.

As described above, when each shearing member 4 is configured to be freely protrusive by the rod 5 and the spring 7, it is usually sufficient to configure the rod 5 to be driven by the cam 8 or the like.

Next, the effects of the removing device having the above-mentioned configuration will be explained through the manner in which it is used.

If, when producing granular lime nitrogen from calcium carbide in a kiln, calcium carbide and lime nitrogen gradually adhere to the surface of the lining brick 2, and the adhering material 3
grows and becomes a ring.

Next, even if the ring-shaped deposit 3 is formed on the inner wall surface of the kiln, for example, the shearing members 4 installed at three locations can be
By driving, the ring-shaped adherent material 3 is cut and removed.

That is, the cam 8 is usually fixed to the upper part of the kiln, and as the kiln rotates, the upper end of the rod 5 moves to the cam 8.
contact with.

Therefore, when pushed by the cam 8, the rod 8 is pushed down and the shearing member 4 protrudes in the radial direction, forming a ring-like shape.
The wear-resistant material 3 is cut and dropped.

In this case, when the kiln rotates once, the rods are protruded from three locations, and the ring-shaped adhesive material breaks apart and falls off.

Note that the mounting position of the cam 8 may be adjusted to 10 to 200 mm in accordance with the stroke of the rod 5, and the shearing member 4 does not necessarily have to have a triangular cross section, but may be configured so that a ring-shaped adherent can be cut. Then, it can be constructed into any shape.

If each of the shearing members in the housing is constructed so as to be able to protrude in the radial direction, the drive mechanism thereof does not necessarily have to be comprised of a rod and a cam that contacts the rod.

As explained in detail above, since the present invention is provided with shearing members that protrude in the radial direction along the longitudinal direction of the kiln, the deposit-resistant material can be easily removed even during operation. When one drive of the member is linked with the rotation of the kiln, the deposit-resistant material can be removed continuously or steadily with the operation.

[Brief explanation of drawings]

1 and 2 are longitudinal and transverse sectional views, respectively, of a rotary kiln having a removing device according to an embodiment of the present invention. Code: 1... Iron shell, 2... Lining brick, 3... °°゛ attached restraint... Shearing member, 4
a... Edge part, 5... Rod, 6...
...Protection tube, 7...Spring, 8...
···cam.

Claims (1)

[Claims] 1. A rod-shaped shearing member is installed along the longitudinal direction on the inner wall surface of the rotary kiln, and the rod-shaped shearing member is configured to protrude in the radial direction from the inner wall surface,
Furthermore, the apparatus for removing deposits from an inner wall surface of a rotary kiln for producing granular lime nitrogen, characterized in that a shearing edge portion is formed along the longitudinal direction on the surface of the shearing member.