JPS61195938A - Mercury recovering device - Google Patents

Abstract

PURPOSE:To make possible to the reduction of cost by the constitution consisting in passing mercury-contg. apparatus waste subjected to a disintegration treatment into a heating pipe disposed in an incineration furnace, cooling the formed mercury vapor to liquefy in a heat exchanger and taking the residues out of a branch pipe. CONSTITUTION:Various kinds of mercury-contg. apparatus waste of waste dry cells, etc., are charged through a charging port 1 of a disintegrator 2 and are subjected to the disintegration treatment then the waste materials are passed through the heating pipe 4 disposed in the existing incineration furnace 3. The disintegrated waste is heated by the waste heat of the furnace 3 to evaporate the mercury contained therein. The mercury vapor is liquefied in the heat exchanger 7 communicating with the pipe 4 and is recovered into a mercury accepting vessel 8. On the other hand, the residues generated in the pipe 4 are discharged from a residue take-out pipe 5 branched from the pipe 4 into an outside residue vessel 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a device that makes it possible to reduce costs by using an existing incinerator when recovering mercury from mercury-containing equipment waste such as waste dry batteries. Regarding.

[Conventional technology]

Traditionally, mercury-containing devices such as used dry batteries are disposed of at final disposal sites along with general waste.

Or incinerated.

[Problem that the invention seeks to solve]

However, mercury contamination due to mercury contained in waste dry batteries and the like has become a problem, and there is currently no appropriate disposal method. Disposal methods using dedicated incinerators have been considered for some of the waste, but this requires a large amount of expense.

An object of the present invention is to propose a processing device that solves the above problems.

[Means for solving problems]

To achieve the above object, the present invention provides a heating tube that is installed in an existing incinerator and passes crushed mercury-containing equipment waste, a residue extraction tube that branches off from the heating tube and takes out the residue, and We propose a mercury recovery device characterized by comprising a heat exchanger that is provided in communication with the heating tube and cools and liquefies mercury vapor generated within the heating tube.

[Effect]

In the device of the present invention, mercury-containing equipment waste that has been crushed is passed through a heating tube installed in an existing incinerator, and the waste heat of the incinerator is used to evaporate the mercury, and the residue is transferred to a residue extraction tube. Take it out separately.

On the other hand, mercury vapor is cooled and liquefied in a heat exchanger installed in communication with the heating tube, and is recovered separately. Therefore, incineration of mercury-containing equipment waste, mercury recovery, etc. can be performed at the same time, and pollution-free treatment can be achieved.
It enables weight reduction and resource conservation at the same time, and it can also reduce costs because it uses waste heat from incinerators for waste materials, etc.

〔Example〕

Next, an embodiment of the apparatus of the present invention will be explained based on the drawings. In Fig. 1, l is the input port of the crusher 2 into which various mercury-containing equipment waste such as waste dry batteries is input, 8 is the existing incinerator, 4
5 is a processing heating pipe that communicates with the discharge port of the crusher 2 and is installed in the incinerator 8, 5 is a residue removal pipe that is branched from the heating pipe 8 within the incinerator 8, and 6 is a pipe that is installed outside the incinerator. 7 is a heat exchanger that communicates with the heating tube 4 outside the incinerator and cools the mercury vapor generated in the heating tube 4 and returns it to mercury; 8 is a container that receives the cooled mercury.

In this device, after the incinerator 8 is in a normal operating state, various mercury-containing equipment waste such as waste dry batteries is loaded into the input port 1.
and crushed by crusher 2.

Next, the crushed waste moves to the processing heating tube 4, where it is heated by the waste heat of the incinerator 8, and the mercury evaporates to become mercury vapor. The mercury vapor is liquefied in the heat exchanger 7 and collected in the mercury receiver 8. On the other hand, the residue is discharged from the residue take-out pipe 5 into an external residue container.

〔Effect of the invention〕

Currently, mercury-containing equipment waste such as used dry batteries cannot be disposed of by landfill or incineration because it contains mercury, but the device of the present invention can recover mercury and make it possible to dispose of the residue in a landfill. Furthermore, since the apparatus of the present invention performs processing using waste heat from an existing incinerator, the cost is significantly reduced compared to processing using a dedicated incinerator.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the apparatus of the present invention. 2... Crusher, 8... Existing incinerator, 4... Heating tube. 5...Residue extraction pipe, 6...Residue container, 7...Heat exchanger. 8...Mercury receptor.

Claims (1)

[Claims] A heating pipe installed in the existing incinerator to pass the crushed mercury-containing equipment waste, a residue extraction pipe branched from the heating pipe to take out the residue, and a residue extraction pipe installed in communication with the heating pipe and inside the heating pipe. A mercury recovery device comprising: a heat exchanger that cools and liquefies mercury vapor generated in the mercury recovery device.