JPH0199654A - Cruser - Google Patents

Abstract

PURPOSE: To reduce a running cost and to prevent the explosion within a crushing machine by executing the supply of inert gas into the crushing machine by using a circulating route for circulating the inert gas to a gas discharge pipe, an exhauster, a gas recovering pipe and a gas supply pipe in this order. CONSTITUTION: This crushing device is provided with the circulating route 19 of the inert gas consisting of the gas supply pipe 6 which is connected to the crushing machine 1 and supplies the inert gas into the crushing machine 1, the gas discharge pipe 9 which connects the crushing machine 1 to the inhalation side of the exhauster 13 and the gas recovering pipe 15 which connects the discharge side of the exhauster 13 to the gas supply pipe 6. Consequently, the inside of the crushing machine 1 with a small amt. of the inert gas may be maintained always at a low-oxygen concn. and the explosion within the crushing machine 1 for crushing bulky waste, non-combustible waste, or the like is surely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a crushing device for crushing bulky waste, non-burnable waste, and the like.

BACKGROUND TECHNOLOGY Combustible explosives such as sprays are mixed into bulky waste and non-combustible waste, and crushing equipment that processes them requires explosion-proof equipment. An example of this explosion-proof method is an inert gas injection method.

This method injects inert gas such as CO2 or N2 into the crushing equipment at all times or when an increase in gas concentration is detected.
This maintains the oxygen concentration within the crusher below the explosion limit.

Problems to be Solved by the Invention In the above-mentioned conventional inert gas blowing method, the running cost becomes extremely high in the case of a constant blowing method, making it uneconomical, and in the case of gas concentration detection, It cannot respond to explosions caused by rapid rise.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a crushing device that has low running costs and can prevent sudden explosions.

Means for Solving the Problems In order to solve the above problems, the present invention provides a gas supply pipe that is connected to the crusher to supply inert gas into the crusher, and a gas supply pipe that connects the crusher to the suction side of the exhaust fan. The structure includes an inert gas circulation path consisting of a gas exhaust pipe and a gas recovery pipe that connects the discharge side of the exhaust fan to the gas supply pipe.

Function: With the above configuration, inert gas is blown into the crusher from the gas supply pipe, reducing the oxygen concentration to prevent explosions of combustible gas mixed in bulky waste and non-burnable waste, and exhausting the gas using the exhaust fan. Since suction is carried out through the pipe, the inside of the crusher is under negative pressure to prevent inert gas from flowing out, and the inert gas discharged from the crusher is returned to the crusher through the gas supply pipe using the gas recovery pipe. Since it circulates, the running time of the crushing equipment can be significantly reduced.

Example An embodiment of the present invention will be described below with reference to FIG.

Reference numeral 1 denotes a rotary crusher, into which non-combustible garbage and large-sized waste is supplied by an inlet conveyor 3 to an entrance section 2 at the top, and crushed garbage is discharged from a vibrating conveyor 5 at a discharge section 4 at the bottom.

A gas supply pipe 6 is connected at one end to a gas cylinder 7 which is a supply source of inert gas such as CO2 or N2, and at the other end is connected to the crusher 1, and an on-off valve 8 is interposed therein. 9 is a gas exhaust pipe, one end of which is a hood 10 of the inlet part 2 with a crushed part n1.
and a rear hood 11 and a hood 12 of the discharge section 4
The other end is connected to the suction side of the exhaust 13. A dust collector 14 is connected to the gas discharge pipe 9 to remove the dust of the inert gas sucked from the crusher 1. 15 is a gas recovery pipe, one end of which is connected to the exhaust 8a.
It is connected to the discharge pipe 16 on the discharge side of the IF 113, and the other end is connected between the on-off valve 8 of the gas supply pipe 6 and the crusher 1, and the inert gas that has been sucked from inside the crusher n1 and dust removed is re-injected. Return to the crushing file. The discharge pipe 16 is the exhaust pipe 1
7, and releases the inert gas M inside the crusher 1 to the outside by opening the exhaust damper 18 as necessary, and is closed by the damper 18G during normal operation. In this way, t
The gas supply pipe 6, the gas discharge pipe 9, and the gas recovery pipe 15 form an inert gas ring path 19, and the inert gas can be used effectively.

Reference numerals 20 and 21 are oxygen concentration meters that detect the oxygen concentration in the crusher 1 and the gas recovery pipe 15, respectively, and when the oxygen concentration reaches a predetermined level or higher, the opening/closing valve 8 is activated to replenish the non-heterogenous gas.

Next, the effect will be explained.

The on-off valve 8 is turned on to fill the crushing film with inert gas from the gas cylinder 7 via the gas supply pipe 6 to lower the oxygen concentration, and at the same time, the crusher 1 is driven to drive the crusher 1, which is transported from the carry-in conveyor 3. Crush and discharge large garbage, etc. At the same time, the exhaust HA machine 13 was activated to suck inert gas through the gas exhaust pipe 9 from the hoods 10, 11, and 12 provided at three locations in the crusher ii, and the dust was removed through the collector 14. 13 and returns to the gas supply pipe 6 via the gas recovery pipe 15. In this way, the inert gas is circulated through the crusher 1, the gas discharge pipe 9, the gas recovery pipe 15, the gas supply pipe 6, and the crusher 1 in this order.

During the circulation of this inert gas, the inside of the crusher 1 is sucked by the exhaust 13 and is in a negative pressure state, so that the inert gas does not flow out.

Also, during this circulation, the on-off valve 8 is closed and the supply of inert gas is stopped, and only when the reading of the oxygen concentration meter 20, 21 exceeds a predetermined value, the worker operating the crushing device opens and closes the valve 8. The valve 8 is opened to supply inert gas to the circulation path 19.

Effects of the Invention As described above, according to the present invention, inert gas is supplied into the crusher using a circulation path that circulates through the gas exhaust pipe, the exhaust fan, the gas recovery pipe, and the gas supply pipe in this order. As a result, the inside of the crusher can always be kept at a low oxygen concentration using a small amount of inert gas, and explosions inside the crusher can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a piping route diagram showing one embodiment of the present invention. 1... Crusher, 6... Gas supply tube, 7... Gas cylinder, 8... Open/close valve, 9... Gas discharge pipe, 13...
・Exhaust air■, 14... Dust collector, 15... Gas recovery pipe. Agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A gas supply tube that connects to the crusher and supplies inert gas into the crusher, a gas exhaust pipe that connects the crusher to the suction side of the exhaust fan, and a discharge side of the exhaust fan that connects to the gas supply pipe. A crushing device characterized by having an inert gas circulation path consisting of a gas recovery pipe.