Water cooling jacket incineration device and method for processing salt-containing waste liquid and waste gas

Abstract

The invention discloses a water cooling jacket incineration device and method for processing salt-containing waste liquid and waste gas. The device comprises a combustion-supporting combustor (10), anincineration furnace (20), a waste liquid spraying device (30), a waste gas spraying device (40), a water cooling jacket device (50), a cooled water heat exchanger (60) and a double-shaft cooling slag discharging device (70); and a bottom incineration technology is adopted, high-temperature flame is generated at the bottom of the furnace to realize complete decomposition of waste, meanwhile, liquid state molten salt is smoothly discharged out of the incineration furnace (20) with lowest fuel consumption, the double-shaft cooling device (70) is used for enabling the molten salt phase to be solidified, and finally solid state slag discharging is realized. The incineration device synchronously adopts a water cooling jacket technology, a solid slag layer is formed on a furnace liner flame facing surface, and slag resistance with the slag is realized, under the condition that a chromium-containing liner is abandoned, the service life of the furnace liner is effectively prolonged, and long-period, low-cost, stable and safe operation of the incineration furnace is realized.

Description

technical field [0001] The invention relates to a water-cooled jacket incineration device and method for treating salt-containing waste liquid and waste gas, and belongs to the technical field of salt-containing waste product treatment. Background technique [0002] With the rapid development of petrochemical, coal chemical, papermaking, pesticide and other industries, in the production process, a large amount of high-concentration saline waste liquid is often discharged. These waste liquids also contain a large amount of non-biodegradable organic matter, and some components Higher toxicity. Industrial industries usually use high-temperature incineration to treat salt-containing waste liquid, which produces harmless gas and discharges it into the atmosphere. However, the main difficulty of this method is that the waste liquid will generate low-melting alkali metal salts during incineration. The melting point in the high-temperature furnace with a complex environment is as l...

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Problems solved by technology

[0004] (1) The entire system operates under positive pressure, which does not meet GB18484 "Pollution Control Standards for Hazardous Waste Incineration";

[0005] (2) During the operation of the whole system, the quenching water is completely converted into waste water to be treated, and the water consumption is large;

[0006] (3) The enthalpy of high-temperature flue gas produced by waste liquid incineration cannot be recycled, and the energy consumption is high;

[0007] (4) The incineration device adopts an adiabatic furnace, and the molten salt generated during the incineration process of saline waste liquid severely corrodes the lining, and the falling off lining can easily block the quenching tank, affecting the long-term operation of the device, requiring regular replacement of the entire furnace lining, and high maintenance costs

[0009] (1) The incineration boiler adopts a natural circulation membrane wall structure, which is complex in structure and difficult to operate;

[0010] (2) Limited by the thermal load of the furnace section, this furnace type is not suitable for processing small and medium amounts of saline waste liquid;

[0011] (3) Under normal working conditions, in order to ensure smooth slagging at the bottom of the boiler, the bottom of the furnace needs to burn fuel to maintain high temperature, which increases the operating cost;

[0013] There is an inevitable acid dew point corrosion problem in the rear system

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