Low nitrogen coupling combustion system for the disposal of waste stink gas and solid waste
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Solution Overview
Problem
Current waste incineration methods in China face challenges with landfill leachate pollution, hazardous fly ash, and inefficient energy use, particularly in treating stink gas from waste pits, which leads to environmental pollution and high operational costs.
Innovation Solution
A low nitrogen coupling combustion system is introduced, comprising a waste pit, stink gas incineration equipment, and a waste incinerator, where high-temperature, low-oxygen flue gas from stink gas incineration is used as combustion-supporting air for the waste incinerator, with heat exchangers for energy recycling and redundant incineration equipment for continuous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If waste gas is heated to 220°C by absorbing heat through the heat exchanger and introduced into the waste incinerator for combustion, then the waste gas can be treated, but the incineration process occurs at relatively low temperature resulting in ash accumulation and coking on the furnace wall
Solution Approach 1:
The patent combines the waste gas treatment process with the incinerator combustion process by introducing preheated waste gas directly into the combustion chamber as both fuel and heat carrier. This merging eliminates the separate low-temperature combustion approach and integrates it with high-temperature waste incineration, thereby preventing coking while treating waste gas.
Solution Approach 2:
The patent changes the temperature parameter of the waste gas from low-temperature (220°C) preheating to high-temperature combustion (800-1200°C) by directly introducing it into the combustion chamber. This parameter change transforms the waste gas from a mere heat exchange medium to an active combustion participant, preventing ash accumulation and coking.
2Object-affected harmful factors
If waste gas is treated by heating and combustion, then the waste gas can be disposed, but energy is consumed and operational costs increase
Solution Approach 1:
The patent applies self-service by using the waste gas itself as the fuel source for combustion. The waste gas contains combustible organic components that, when burned, provide the heat energy needed for the incineration process. This eliminates or reduces the need for external fuel input, significantly lowering energy consumption and operational costs.
Solution Approach 2:
The patent converts the harmful waste gas into a beneficial fuel source. The combustible organic matter in the waste gas, which was previously a pollutant, is now used as fuel to drive the incineration process. This transformation turns a harmful factor into a useful resource, reducing both pollution and energy costs.
3Productivity
If waste gas is combusted at low temperature, then the process can proceed, but ash accumulation and coking occur on the furnace wall affecting incineration efficiency
Solution Approach 1:
The patent changes the temperature parameter from low-temperature combustion to high-temperature combustion (800-1200°C) by introducing waste gas directly into the combustion chamber. This temperature increase ensures complete combustion, prevents ash accumulation and coking, and maintains high incineration efficiency while preserving waste gas treatment capacity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system effectively disposes of stink gas, reduces nitrogen oxide generation, prevents coking, saves energy, and lowers operational costs by recycling waste heat, thereby minimizing pollution and extending incinerator lifespan.
Implementation Method 1
the stink gas incineration equipment is provided with an incineration chamber for burning stink gas
Implementation Method 2
with heat exchangers for energy recycling
Implementation Method 3
high-temperature and low-oxygen flue gas discharged by the stink gas incineration equipment is led into the waste incinerator and used as the combustion-supporting air
Data Source
AI summary
A low nitrogen coupling combustion system for the disposal of waste stink gas and solid waste, including a waste pit, at least one stink gas incineration equipment and a waste incinerator, wherein the waste pit is equipped with stink gas outlets and the stink gas incineration equipment is provided with an incineration chamber for burning stink gas, as well as a stink gas inlet, a fuel inlet and a burned stink gas outlet which are connected with the incineration chamber; the stink gas inlet is connected with the stink gas outlet of the waste pit through a stink gas delivery pipe, and the fuel inlet is connected with a fuel source through a fuel delivery pipe; the burned stink gas outlet is connected with a combustion-supporting air inlet of the waste incinerator through a flue gas discharge pipe.