JPH0534422U - Melting furnace slag outlet - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the abrasion and damage of the refractory slag outlet that discharges the molten slag and to prolong the service life. [Structure] A slag spout refractory 14 arranged at the bottom of the slag spout 3 and having a discharge groove 13 is provided with a hollow water-cooling jacket 15 in contact with a predetermined portion of the outer surface excluding the discharge groove 13, and this cooling jacket Water-cooled water supply pipe 16 that supplies and discharges cooling water within 15
And the cooling water discharge pipe 17 was connected. [Effect] Self-coating is performed by solidifying molten slag on the surface of the discharge groove.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an slag outlet of a melting furnace such as an arc type or a burner type for heating and melting the incineration ash discharged from the refuse incinerator to reduce the volume and recycle the resources.

[0002]

[Prior Art]

 Conventionally, a weir refractory having a discharge groove formed integrally with the refractory has been arranged at the slag outlet of the melting furnace.

[0003]

[Problems to be solved by the device]

 However, high temperature molten slag and metal (including the base metal in the case of arc type) flow out into the discharge groove of the weir refractory material, which is extremely easy to melt and has low durability. In order to repair or replace the weir refractory, it is necessary to stop the operation of the melting furnace, and if repair or replacement is repeated in a short period, there is a problem that the operation time is shortened and the operation is affected. It was

An object of the present invention is to solve the above-mentioned problems and to provide a slag outlet of a melting furnace capable of improving the durability of the bottom refractory of the slag outlet and extending the life thereof.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the slag outlet of the melting furnace of the present invention comes into contact with a predetermined portion of the outer surface of the slag outlet refractory, which is disposed at the bottom of the slag outlet and has a discharge groove, except the discharge groove. A hollow cooling block is provided, and a cooling water supply pipe for supplying and discharging cooling water and a cooling water discharge pipe are connected to the inside of the cooling block.

[0006]

[Action]

 According to the above-mentioned configuration, since the cooling water is used to cool the slag outlet refractory through the cooling block, the molten slag solidifies on the surface of the outlet and self-coats. As a result, melting damage of the slag outlet refractory due to molten slag can be prevented and the life of the slag outlet refractory can be extended.

[0007]

【Example】

 An embodiment of a slag outlet provided in an arc type ash melting furnace according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 4 and 5, a furnace body 1 for accommodating a base metal 2 is formed in an oval shape in plan view by a hearth 1a and a side wall 1b, and one side wall 1b is provided with a predetermined interval. Three slag outlets 3 are provided, and a monitoring window 4 is provided between the slag outlets 3 and on the side wall 1b on the ellipse top side. In the cover body 5 covering the furnace body 1, a plurality of electrodes 7 supported by an electrode support arm 6 so as to be able to move up and down are arranged via seals at the insertion port 5a, and an incineration ash charging port 8 and an exhaust gas port 9 are provided. Has been formed. Reference numeral 7a denotes a preliminary electrode arranged at the preliminary electrode lifting device attachment port 12 of the outlet port 3, and 10 denotes a furnace transformer for applying a voltage to the electrode 7.

As shown in FIGS. 2 and 3, the drainage port 3 is provided with an emergency shutoff material charging port 11 and a preliminary electrode lifting device mounting port 12 in the upper part, and a draining groove 13 in the bottom part. A slag outlet refractory 14 is arranged.

As shown in FIG. 1, a hollow water cooling jacket (an example of a cooling block) 15 having a symmetrical structure that is divided into two is attached to the slag outlet refractory material 14. The water cooling jacket 15 includes a front surface portion 15a that is applied to the front surface 14a of the exhaust outlet refractory 14 excluding the outlet 13a portion of the exhaust groove 13 and a side surface portion 15b that is applied to the side surface 14b portion of the exhaust outlet refractory material 14. And a bottom portion 15c that is abutted against the bottom portion 14c of the slag outlet refractory 14. The front face portion 15a is provided with a cooling water supply port 15d to which a cooling water supply pipe 16 is connected, and a cooling water drain port 15e which is connected to a cooling water drain pipe 17. Although not described in detail, the water cooling jacket 15 has a hollow shape so that the cooling water injected from the cooling water supply port 15d can be circulated therein to uniformly cool the front surface portion 15a, the side surface portion 15b, and the bottom surface portion 15c. Is configured.

According to the above-described embodiment, the cooling water injected from the cooling water supply pipe 16 into the water cooling jacket 15 through the cooling water supply port 15d releases heat from the front surface portion 15a, the side surface portion 15b and the bottom surface portion 15c. It is taken and drained to the cooling water drain pipe 17 through the cooling water drain port 15e. Therefore, the entire slag outlet refractory 14 is cooled substantially evenly, the surface of the discharge groove 13 is also cooled, and the molten slag (including the overflowed base metal 2) flowing out of the discharge groove 13 is also cooled. Self-coating is performed to cover the surface of the discharge groove 13. Therefore, the molten slag comes into contact with the discharge groove 13 through the coating layer of the solidified slag, and the molten metal of the high temperature molten slag and the base metal 2 discharged together with the molten slag melts the water cooling jacket 15 in the discharge groove 13 portion. Loss can be prevented.

[0012]

[Effect of the device]

 As described above, according to the present invention, since the slag outlet refractory is cooled by the cooling water via the cooling block, the molten slag is solidified on the surface of the outlet and self-coating is performed. Therefore, the solidified slag can prevent the melting and slag from melting the slag outlet refractory, and extend the life of the slag outlet refractory.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a water cooling jacket of an arc type ash melting furnace according to the present invention.

FIG. 2 is a front view of the slag outlet.

FIG. 3 is a longitudinal sectional view of the slag outlet.

FIG. 4 is a plan sectional view of the furnace body.

FIG. 5 is an overall cross-sectional view of the same arc type ash melting furnace.

[Explanation of symbols]

 1 Furnace Main Body 2 Base Metal 3 Drainage Port 5 Cover Body 7 Electrode 8 Ash Input Port 13 Drainage Port 14 Drainage Port Refractory Material 15 Water Cooling Jacket 16 Cooling Water Supply Pipe 17 Cooling Water Discharge Pipe

Claims (1)

[Scope of utility model registration request] 1. A slag spout refractory disposed at the bottom of the slag spout and having a discharge groove is provided with a hollow cooling block that comes into contact with a predetermined portion of the outer surface excluding the discharge slot, and cooling water is provided in this cooling block. A slag outlet of a melting furnace, characterized in that a cooling water supply pipe for supplying and discharging the cooling water and a cooling water discharge pipe are connected.