JPS5833519Y2 - rotary furnace - Google Patents

Description

[Detailed description of the invention] The present invention is a furnace used, for example, to dry sludge generated in water treatment facilities, or to incinerate various industrial wastes such as dried sludge and municipal garbage. For more information, please see
This invention relates to a rotary furnace in which a cylindrical body is rotatably driven around a horizontal axis.

The above-mentioned rotary furnace is lined with refractory bricks or castable to suppress thermal energy loss. Due to the combination of thermal damage and mechanical damage due to transfer of the cylinder, they often come off, necessitating frequent repairs and resulting in an economical burden.

In addition, the rotary cylinder has a large weight, and its operating power cost is high, and the drive structure requires a certain degree of strength.

As a solution to the above-mentioned drawbacks of the rotary furnace, for example, as shown in Japanese Patent Application Laid-open No. 54-66570,
There is a structure in which a heat insulating material is loaded between the inner and outer double cylinders, but in this case, there is no need to line the interior with fire bricks or castables, so it is effective in eliminating the above-mentioned disadvantages. However, due to combustion inside the inner cylinder, the degree of expansion between the inner and outer cylinders differs, so as a means to absorb the difference in expansion amount, a long hole is installed in the connection structure between the inner and outer cylinders. This system had a flexible mechanism that utilized the following, and as a result, there were disadvantages such as the inner cylinder, which rotates as the outer cylinder is driven, shaking vertically and causing uneven rotation.

In addition, as a device that does not cause rotational unevenness, there is, for example, the one described in Japanese Patent Publication No. 58-78906, in which one end is fixed to the inner cylinder and the outer cylinder is slidably moved outward from the hole formed in the outer cylinder. The ronds that protrude from the outer cylinder are arranged side by side in the circumferential direction of the inner and outer cylinders, and each of the rond parts that protrude outward from the outer cylinder is equipped with a spring, so that the inner cylinder is pulled by the pulling force of the spring in the direction of the outer cylinder. However, since one end of the rond is fixed to the inner cylinder, the relative deformation of the inner cylinder due to thermal expansion in the radial direction with respect to the outer cylinder can occur even when waiting for customers. , thermal expansion and relative deformation of the inner cylinder in the direction of the rotational axis cannot be tolerated, and for this reason, there is a restriction that the ronds must be provided on the circumferential portions of the inner and outer cylinders that are lined up at the center in the direction of the rotational axis, There was a drawback that it was difficult to hold the inner cylinder stably and reliably.

The purpose of this invention is to successfully absorb the difference in thermal expansion between the inner and outer cylinders in a rotary furnace filled with heat insulating material between the inner and outer cylinders, and at the same time to prevent backlash in the inner cylinder. To provide a rotary furnace which can eliminate rotational irregularities and which can securely hold an inner cylinder and drive smoothly.

The characteristic structure of the rotary furnace of the present invention is that the connecting tool for fitting and holding the inner cylinder into the outer cylinder is attached to the contact surface that comes into contact with the outer peripheral surface of the inner cylinder through a through hole drilled in the outer cylinder. a pushing member having a tip at its tip, a cylindrical body erected on the outer surface of the outer cylinder around the through hole, and a suppressing seat installed inside the cylindrical body, the position of which can be freely changed inside or outside in the radial direction of the outer cylinder. a position adjuster,
The structure includes a catch seat provided on the upper end side of the pushing member and a bullet interposed between the suppressing seat, and the pushing member pressurized by the bullet presses the inner cylinder against the outer cylinder. Because it has the effect of elastically regulating the relative position of the cylinder in the radial and circumferential directions, it effectively absorbs the difference in thermal expansion between the inner and outer cylinders, while also eliminating looseness in the radial direction due to the rotation of the inner cylinder. Moreover, there is an effect of effectively preventing the occurrence of uneven rotation caused by backlash.

In addition, since the position adjustment device provided in the coupling device has the function of freely adjusting the elasticity of the bullet, it is possible to prevent the occurrence of backlash due to material fatigue of the bullet.
This has the effect of being able to hold the inner cylinder with appropriate elastic force for a long period of time.

Furthermore, since the pushing member holds the inner cylinder through surface contact, thermal expansion deformation of the inner cylinder in the direction of the rotational axis can be tolerated by sliding with the contact surface of the pushing member. It is not necessary to arrange the members side by side on the same circumference, and the pushing member can be freely arranged at a position where it is easy to hold the inner cylinder, and the inner cylinder can be reliably held and driven smoothly.

Next, embodiments of the present invention will be described based on the drawings.

An inner cylinder 1 made of a metal such as a heat-resistant steel plate, an outer cylinder 2 made of a metal such as ordinary steel that holds the inner cylinder 1 concentrically with a distance from the inner cylinder 1, and both the inner and outer cylinders thereof. 1 and 2 are filled with a heat insulating material 3 such as asbestos thread to form a cylinder 4.
Annular rails 5, 5 are biased on both ends of the rails 5, and a pair of buckled roller groups 6, 6 separated by an interval for fitting the rails 5 are placed on a support stand corresponding to the rails 5, 5. 7, and the rail 5.5 is attached to the roller group 6, 6.
The cylindrical body 4 is mounted and constructed so as to be rotatable around the horizontal axis, and a deceleration drive device 8 attached to the support base 7 and a pair of sprockets 9 a and 9 b are provided on the cylindrical body 4. , path inflection sprocket) 9c, both sprockets 9a via 9c.

9b, the endless chain 10 is wound around the cylindrical body 4.
The drive is made to rotate.

A screw feeder 11 and a combustion burner 1 that supply various objects to be processed into the cylinder 4 through a pumper 11a.
2, and a processing material outlet 14a at the bottom.
and a cover body 16 having an exhaust gas outlet 14b for the flue 15 formed in the upper part thereof, each of which is lined with fireproof brick or castable, is erected on support stands 7 on both ends of the cylinder body 4,
In addition, each of the side lid bodies 13 and 16 is relatively rotatably connected to the cylinder body 4 via the seal connection structure, and as the cylinder body rotates 40 times, the object to be processed fed into the inner cylinder 1 is transferred for a short period of time. The first screw 17a, which transports the object in a direction away from the feed material, and the second screw 17b, which transports the object toward the processing material outlet 14a while increasing the retention time, are respectively inserted into the inner cylinder 1. Attached to the peripheral surface, while the object to be processed is rolled in the inner cylinder 1 and transferred from i to the outlet 14a, the object to be processed is dried or incinerated, and the object to be processed is taken out from the outlet. It is designed to be taken out continuously from 14a.

In order to fit and hold the inner cylinder 1 in the outer cylinder 2, as shown in FIG. 19 is welded to the outside of the outer cylinder 2, a cylinder body 20 is provided with this member 19 fitted inside, and a cylinder body 22 with a lid 21 externally fitted and screwed is attached to the cylinder body 2.
0, and the pin body 23, which is a push member that penetrates the guide cylinder 18 and whose tip abuts the outer surface of the inner cylinder 1, is connected to the thick plate member 19 in the state of contact. The catch seat 24 is installed with a gap between the seats 24 and a position adjustment tool 25, which can be screwed in the axial direction of the pin body 23 to change its position and fixed, is installed on the lid body 21, and this position adjustment tool A connecting tool 28 is constructed by interposing a pressurized dust 26 and a bullet 27 between the receiving seat 25 and the seat 24.

As shown in FIG. 1, a plurality of connectors 28 are attached to both ends of the outer cylinder 2 at intervals in the circumferential direction thereof, and the biasing force of the bomb 27 against the pin body 23 can be adjusted. The inner cylinder 1 is fitted and held in the outer cylinder 2 by abutment of the tip of the pin body in a state where the inner cylinder 1 is allowed to move relative to the radial direction against the biasing force. That is, the inner cylinder 1 is attached to the outer cylinder 2 in a state that allows thermal expansion of the inner cylinder 1, thereby preventing damage to the inner cylinder 1 due to thermal distortion.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the rotary furnace according to the present invention, and the first
2 is a sectional view taken along the line ■--■ in FIG. 1, and FIG. 3 is a detailed sectional view of the connector. DESCRIPTION OF SYMBOLS 1... Metal inner cylinder, 2... Metal outer cylinder, 3... Heat insulating material, 27... Bullet machine, 28... Connector.

Claims (1)

[Scope of utility model registration request] A heat insulating material 3 is filled between the inner and outer metal cylinders 1°2, which can be rotated around the horizontal axis, and the inner cylinder 1 is fitted and held in the outer cylinder 2 via the connector 28. The connector 28 includes a pushing member 23 having a contact surface T at its tip that contacts the outer peripheral surface of the inner cylinder 1 through a through hole bored in the outer cylinder 2, and a pushing member 23 that stands on the outer peripheral surface of the outer cylinder 2 around the through hole. a cylinder body 22 provided therein, a position adjuster 25 that can freely change the position of the suppression seat 26 installed in the cylinder body 22 inside and outside in the radial direction of the outer cylinder, and a position adjuster 25 provided on the upper end side of the pushing member 23. catch seat 24 and the pressing seat 2
6. A rotary furnace comprising: a bomb 27 interposed between the rotary furnace 6 and the ammunition 27;