Waste liquid incineration boiler of recycling smoke adherence protection

Abstract

The invention relates to the technical field of waste liquid treatment, and specifically to a saliferous organic waste liquid incineration boiler of recycling smoke adherence protection. The boiler comprises a lower heat-insulating hearth, a radiation cooling chamber, a horizontal flue and a tail flue which are connected in turn, and a soot blower which is installed above the radiation cooling chamber, the horizontal flue and the tail flue; the tail flue is provided with a I-level economizer, a II-level economizer and the like. The key point of the saliferous organic waste liquid incineration boiler is as follows: the partial smoke at the outlet of the II-level economizer is recycled, and enters the lower heat-insulating hearth and the radiation cooling chamber as the adherence protection smoke; and the connecting position between the lower heat-insulating hearth and the radiation cooling chamber is a V-shaped included angle, the side wall of the V-shaped included angle is a water cooled wall, a fire-proof material is paved on the water cooled wall, and the bottom of the V-shaped included angle is a liquid-state discharging device. The incineration boiler is capable of solving the problems that the boiler wall is corroded, the slag is not smoothly discharged, and the discharge value of NOx is higher, and has the advantages of simple structure, convenient use, high processing efficiency, energy conservation, water-saving and the like.

Description

technical field [0001] The invention relates to the technical field of waste liquid treatment, in particular to a high-concentration salt-containing organic waste liquid incineration boiler for wall-protected recirculation flue gas. Background technique [0002] High-concentration organic waste liquid widely exists in basic chemical raw material manufacturing, coal chemical industry, petrochemical industry and other industries. The total discharge of wastewater (liquid) in my country has been on the rise in the past five years, and industrial wastewater (liquid) is the main source of pollution in my country's water environment. The industrial wastewater (liquid) discharged every year in my country accounts for about 50% of the total discharge of wastewater (liquid). Therefore, it is of great practical significance to research and apply the treatment method of high-concentration organic waste liquid. High-concentration organic waste liquid not only has high concentration of...

AI Technical Summary

Problems solved by technology

The waste liquid incinerator described in this application has the following disadvantages when incinerating waste liquid: (1) the lower part of the connection between the double incinerators is H-shaped, and the flame filling degree at the bottom of the furnace is relatively poor, and the molten slag is easily deposited on the bottom of the furnace (2) Since there is no protective wind attached to the wall, the molten salt is easily bonded to the wall surface, forming slagging and causing corrosion to the furnace wall surface; (3) Since only one level is arranged Auxiliary burners and no flue gas recirculation are not conducive to controlling the temperature of the combustion zone and thus unable to control NO X generation

The waste liquid incinerator described in this application has the following disadvantages: (1) The incineration boiler adopts an upward furnace, and the flue gas flow direction is opposite to the falling direction of the ash, and the high-temperature flue gas carries molten ash into the tail flue, causing corrosion and damage to the heating surface. (2) Since there is no protective wind against the wall, the molten salt is easily bonded to the wall, forming slagging and causing corrosion to the furnace wall; (3) Only one auxiliary burner is arranged and there is no flue gas recirculation , which is not conducive to controlling the temperature of the combustion area, and thus cannot control NO X generation

The waste liquid incinerator described in this application has the following disadvantages: (1) The downward adiabatic furnace is a square furnace bottom, and there is no flame angle, so the bottom of the furnace is difficult to be washed by high-temperature flue gas, and the ash is easy to cool and accumulate at the bottom of the furnace , not easy to discharge smoothly; (2) As the air supply device for shielding the air flow is arranged at the four corners of the furnace, it is difficult to effectively protect the four walls of the furnace which are most susceptible to corrosion by the molten slag carried by the flue gas, and because the air is fed in, it cannot be reduced The oxygen content in the combustion area controls the combustion temperature, which cannot effectively control the formation of NOx; (3) The size of the downward adiabatic furnace is large, and there is no air preheater to preheat the air, the cross-sectional heat load and volume heat load are small, and the boiler cost higher cost

The recirculated flue gas described in this application does not enter the furnace as the wall-attached protection wind, which cannot solve the problem of corrosion on the furnace wall of the liquid slag discharge boiler

[0009] Due to some deficiencies in the above-mentioned existing technologies, it is an urgent problem to develop a salt-containing organic waste liquid incineration boiler that can well solve the problems of boiler wall corrosion, poor slag discharge, and excessive NOx emissions.

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