JPS60179124A - Chimney provided with cooling blade and spray means for collecting poisonous nonferrous metal generating in incineration of waste material or the like - Google Patents

Abstract

PURPOSE:To prevent discharge of hazardous components such as Hg, Cd, Zn, etc. generated during incineration of dry cell, etc. into atmosphere by attaching water-cooled blades to a chimney of an incinerator. CONSTITUTION:Several numbers of water-cooled blades 8 are installed to the inside of a chimney through which cold water at 5-10 deg.C is always circulated. The inside wall 11 of the chimney and the blades 8 are constructed with copper or stainless steel, and is insulated from cold with an insulating material 5. Hazardous waste smoke rising from an incinerator contacts with the inside wall 11 of the chimney and the blades 8 and is cooled to solidify and Hg is liquefied. Liquefied Hg accumulates in an Hg sump 6, drops into a receiver through a flowing pipe 7 and is collected in the receiver. Powdery Cd, Zn, etc. are beaten down by the cooling water from a spray device 1, flowed through a flowing pipe 3 into a receiver, where they are collected.

Description

[Detailed description of the invention] When toxic non-ferrous metals are burned, mercury has a temperature of 357°C and cadmium has a temperature of 7°C.
65℃ Zinc is gasified and vaporized with a heat value of 906℃, and is released into the atmosphere as flue gas, polluting the atmosphere. This is a device to prevent this.

Several blades installed inside the chimney are water-cooled to maintain a constant temperature of 5°C or higher.
Cold water at 10°C is circulated to vaporize toxic gases, pulverize vaporized substances, liquefy mercury, and collect powder-liquid substances using the cooling structure shown in the attached drawing.

The inner wall 11 and blades 8 of the chimney are made of copper or stainless steel in consideration of conductivity and corrosion, and by circulating water cooled by a cooling tower with a pump, the inner wall 11 and blades 8 are kept at a temperature of 5°C to 10°C. Always keep the temperature cool.

The toxic exhaust gas rising from the lower part of the incinerator comes into contact with the inner wall 11 and the blades 8 and is cooled, and the vaporized mercury substance is liquefied and transformed.The liquefied mercury substance passes through the blades 8 and accumulates in the flow pipe 7.
It falls into the storage tank and is collected.

Powders of cadmium, zinc, and other substances are cooled and ejected into the atmosphere, so they are cooled and powdered by hitting the cooling water from the top of the chimney with a sprayer as shown in Figure 1. It is then washed into a storage tank and collected.

The flow rate is controlled to prevent toxic non-ferrous metal powder from escaping into the atmosphere.

The number of blades 8 varies depending on the size and heat amount of the chimney.

By adopting the above treatment method, contamination of the soil can also be prevented.

It can be applied to both new and existing furnaces.

[Brief explanation of drawings]

Figure 1 is a front sectional view Figure 2 is a side sectional view Figure 3 is a plan view Figure 4 1 is a plan view of the blade. 2 is a side view of the blade 1 Cooling water sprayer 2 Powder reservoir 3 Flow tube 4 Cooling water 5 Insulation material 6 Mercury reservoir 7 Mercury flow tube 8 Cooling water vane 9 Cooling water inlet 10 Hot water outlet 11 Inner wall

Claims (1)

[Claims] In order to prevent air pollution during the combustion process of waste such as dry batteries, alkaline batteries, lead batteries, etc., which is currently a problem, toxic gases such as mercury, cadmium, and zinc generated during incineration are collected without releasing them into the atmosphere using a cooling blade spray chimney. equipment to