Gas-solid separating method and system for simple substance sulphur in sulphur-containing exhaust
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Solution Overview
Problem
Current methods for treating sulphur-containing exhausts, such as the Claus process, result in waste of sulphur resources and secondary pollution due to unutilized simple substance sulphur particles, necessitating a more efficient gas-solid separating method and system to enhance sulphur recovery and reduce environmental harm.
Innovation Solution
A method involving rapid cooling of sulphur-containing exhaust to condense sulphur vapor into solid particles, followed by low-temperature washing with a heavy liquid solvent, separation, and recycling of solvents to recover sulphur, utilizing a system comprising quick cooling, low-temperature washing, light and heavy liquid phase separation, and solvent recycling to achieve high sulphur recovery efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the Claus method is used to oxidize H2S to simple substance sulphur, then sulphur production is achieved, but simple substance sulphur particles remain in the exhaust causing resource waste and secondary pollution
Solution Approach 1:
The patent changes the temperature parameter by rapidly cooling the exhaust gas to below 25°C, causing sulphur vapor to condense into solid particles that can be separated. This parameter change transforms the harmful sulphur vapor into separable solid particles, resolving the contradiction between sulphur production and secondary pollution.
Solution Approach 2:
The patent utilizes phase transition by cooling sulphur vapor to condense it into solid particles. This phase change from gas to solid enables effective separation of sulphur from the exhaust gas, eliminating the harmful effects of sulphur vapor while maintaining sulphur production.
2Manufacturing precision
If rapid cooling is performed to condense sulphur vapor into solid particles, then sulphur separating efficiency is improved, but energy consumption increases
Solution Approach 1:
The patent employs self-service by using the exhaust gas itself as the cooling medium. The exhaust gas cools down other portions of the exhaust stream, reducing the need for external cooling energy input while achieving the required temperature for sulphur condensation and separation.
Solution Approach 2:
The patent merges the cooling function with the existing exhaust gas flow system. By integrating the rapid cooling process into the natural exhaust flow and using the exhaust gas itself for cooling, the system reduces additional energy requirements while maintaining high sulphur separation efficiency.
3Manufacturing precision
If heavy liquid phase solvent is used for washing and separating sulphur particles, then separation efficiency is improved, but solvent recycling complexity increases
Solution Approach 1:
The patent replaces complex mechanical separation systems with a chemical solution approach. By using heavy liquid phase solvent that selectively dissolves sulphur particles, the system achieves efficient separation through chemical affinity rather than complex mechanical means, simplifying the overall recycling process.
Solution Approach 2:
The heavy liquid phase solvent acts as an intermediary substance that facilitates the separation of sulphur particles from exhaust gas. The solvent temporarily holds sulphur in solution, enabling easy separation and subsequent recycling of both the solvent and sulphur, thereby reducing system complexity.
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
The method achieves sulphur recovery efficiencies of 90% or higher, reduces energy consumption, and minimizes environmental pollution by effectively purifying exhaust gases and recycling sulphur resources.
Implementation Method 1
rapidly cooling the sulphur-containing exhaust to a temperature below 25° C. so that the simple substance sulphur vapor in the sulphur-containing exhaust is condensed into simple substance sulphur solid particles
Implementation Method 2
the dust is dissolved in the light liquid phase in the extraction tank, the light liquid is discharged, and the simple substance sulphur particles are dissolved in the heavy liquid phase in the extraction tank
Implementation Method 3
heating it to 50-90° C. by irradiation, collecting simple substance sulphur particles, and evaporating to produce a heavy gas phase solvent
Implementation Method 4
cooling the heavy gas phase solvent to a temperature below 25° C. so that the heavy gas phase solvent is converted into a heavy liquid phase solvent
Data Source
AI summary
The present invention discloses a gas-solid separating method and a gas-solid separating system for simple substance sulphur in sulphur-containing exhaust. The gas-solid separating method for simple substance sulphur in sulphur-containing exhaust comprises the following steps: first, cooling sulphur-containing exhaust at an extremely high speed; then, separating dust; finally, recycling a heavy liquid phase solvent and simple substance sulphur; according to the method disclosed by the present invention, the separating efficiency of the simple substance sulphur is up to 90 percent or above; moreover, the exhaust is further purified, and an environment pollution accident is avoided; in a separating process of the simple substance sulphur, the heavy liquid phase solvent of the simple substance sulphur evaporates to form a gas phase solvent which can be recycled as the liquid phase solvent for reusing through cooling, so that the sulphur removing cost is reduced. The system comprises a quick cooling system, a low-temperature washing and purifying system, a light liquid phase and heavy liquid phase separating system, a washing liquid recycling system and a simple substance sulphur recycling system. The system disclosed by the present invention has the advantages of stability and high efficiency in sulphur-containing exhaust treatment, high simple substance sulphur separating efficiency, energy conservation and environmental protection.