Burning process and burning boiler for processing high-density saliferous organic wastewater

Abstract

The invention discloses a burning process and a burning boiler for processing high-density saliferous organic wastewater. The burning boiler comprises a down heat insulation boiler cavity, a multilevel radiation cooling chamber, a convection heat exchange chamber, an ash blowing device, a steam outlet pipe and a steam pocket. The down heat insulation boiler cavity comprises a waste liquid atomizing spraying gun, a two-layer auxiliary gas burner, a secondary air nozzle, an air flow shielding device, a water cooling wall, a fireproof material, a compensation fuel gas burner, a liquid slag removing device and a root portion air nozzle. A radiation heat exchange chamber I comprises a water cooling wall, a fireproof material and a flow guide device. The convection heat exchange chamber comprises a water cooling wall and a convection screen. The burning process effectively controls and optimizes the problems of stable complete burning of heat value high-moisture waste liquid, heating surface slag bonding and ash accumulation, tail heating surface low temperature corrosion, NOX discharge and the like, has good processing effect on the high-density saliferous organic wastewater, achieves effective recycle of resources and is suitable for organic wastewater burning processing of chemical industries.

Description

technical field [0001] The invention relates to a waste liquid incineration process and equipment, which are specifically applied to the incineration treatment of high-concentration salt-containing organic waste liquid in the chemical industry and the heat recovery after incineration. Background technique [0002] my country's petrochemical, metallurgy, papermaking, tanning, pharmaceutical, textile printing and dyeing industries produce tens of millions of tons of waste liquid every year. The waste liquid contains a large number of chemical substances, such as: ammonium sulfate, ammonium nitrate, sodium sulfate, sodium nitrate and Various organic matter etc. High-concentration organic waste liquid is one of the main sources of water pollution. Its discharge seriously damages the ecological environment and threatens human health. For a considerable part of the high-concentration and refractory organic waste liquid, it is difficult to deal with conventional physical and chemic...

AI Technical Summary

Problems solved by technology

However, the waste liquid incinerator described in this patent uses an upward furnace combustion chamber, which has the following disadvantages when incinerating waste liquid: (1) The combustion process of waste liquid is the evaporation of water in the waste liquid, and the combustion after the salt analysis , the waste liquid is sprayed into the lower part of the furnace, and the dry area where the waste liquid burns is mixed with the burnout area, the waste liquid is not completely burned, and the combustion efficiency is low; Then it gathers to the lower part of the furnace, and the molten salt on the wall of the descending furnace can stick to the wall of the furnace and collect in the lower part of the furnace, which is beneficial to slag discharge; (3) If the temperature of the flue gas in the upper part of the furnace is low, the molten salt will stick to the wall , forming slagging; (4) Only one auxiliary burner is arranged, which is not conducive to controlling the temperature of the combustion area, and thus cannot control the NO X generation

[0006] Patent CN201757412U proposes a waste gas and waste liquid incinerator, which includes a vertical circular furnace body, an incinerator is provided on the top of the furnace body, and a spray gun is provided on the shoulder of the furnace body. It communicates with the interior of the furnace body, and the waste gas and waste liquid incinerator only arranges a primary burner on the shoulder, which is not conducive to controlling the burnout of waste liquid and NO X generation; the temperature of the flue gas in the lower part of the waste gas and waste liquid incinerator may be lower than the ash melting point temperature, which will affect the slag discharge

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