Centrifugal Pyrolysis Device for Source Rock Gas Sampling
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Solution Overview
Problem
Current pyrolysis simulation methods for hydrocarbon source rocks face challenges in efficiently collecting generated oil and gas due to closed systems, leading to secondary pyrolysis and inaccurate gas volume measurements, and lack instruments capable of simulating open system conditions for hydrocarbon generation kinetics.
Innovation Solution
A hydrocarbon generation pyrolysis simulation experimental device utilizing a centrifugal turntable with a quartz sample tube, heating and cooling sets, rotary joint, vacuum pump, and gas collecting pipes, allowing for continuous centrifugal sampling and temperature-controlled gas collection, effectively simulating open system conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closed gold tube system is used for pyrolysis simulation, then the experiment can be contained and controlled, but the generated oil cannot be discharged in time and secondary pyrolysis occurs, leading to inaccurate gas generation volume measurements
Solution Approach 1:
The patent introduces a centrifugal force field by rotating the sample tube at high speed (1000-3000 rpm). This dynamic rotation creates a centrifugal force that continuously pushes the generated oil toward the cooler region at the tube outlet, enabling timely discharge and preventing secondary pyrolysis. The system transitions from a static closed tube to a dynamic open-system-like configuration.
Solution Approach 2:
The patent extracts the oil discharge function from the traditional closed gold tube system by introducing a separate cooling region and centrifugal force field. The oil is continuously removed from the heating zone through centrifugal movement to the cooling zone, where it condenses and is collected, effectively separating the generation and discharge processes.
2Productivity
If flowing carrier gas is used to blow out generated oil, then oil can be removed from heating area, but excessively high flow rate dilutes the natural gas making analysis difficult, while excessively low flow rate fails to effectively blow out oil
Solution Approach 1:
The patent replaces the pneumatic carrier gas flow system with a mechanical centrifugal force system. Instead of using gas flow to transport oil, the system uses centrifugal force generated by mechanical rotation to push oil toward the outlet. This eliminates the need for high-flow carrier gas while maintaining effective oil discharge.
Solution Approach 2:
The patent eliminates the reliance on pneumatic carrier gas by using centrifugal force field to achieve oil transport. The centrifugal force creates a pressure gradient that moves oil without requiring external gas flow, thus avoiding gas dilution issues while maintaining discharge effectiveness.
3Quantity of substance
If high temperature heating is applied to generate gas, then gas generation volume increases significantly, but the generated oil undergoes secondary pyrolysis and cannot be discharged in time
Solution Approach 1:
The patent uses high-speed rotation (1000-3000 rpm) to create a dynamic centrifugal force field that continuously moves the oil front toward the cooler outlet region. This dynamic movement ensures that oil is constantly being discharged from the heating zone before secondary pyrolysis can occur, even under high-temperature conditions.
Solution Approach 2:
The patent pre-establishes a temperature gradient along the sample tube, with the outlet region maintained at lower temperature than the heating zone. This preliminary temperature arrangement creates a thermal barrier that prevents secondary pyrolysis while the centrifugal force ensures timely oil discharge to this cooler region.
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 device achieves high experimental efficiency and low analysis error by preventing secondary pyrolysis and accurately collecting gas at different temperatures, simulating natural hydrocarbon generation processes and obtaining maximum oil and gas volumes, as well as kinetic parameters.
Implementation Method 1
a centrifugal turntable, a motor for driving the centrifugal turntable to rotate
Implementation Method 2
a heating set sleeved on an upper part of the quartz sample tube
Implementation Method 3
A hydrocarbon source rock is pyrolyzed to generate oil and gas through a pyrolysis simulation experiment method
Implementation Method 4
a cooling set arranged on a lower part of the quartz sample tube
Implementation Method 5
a vacuum pump, and a plurality of vacuum gas collecting pipes
Data Source
AI summary
A hydrocarbon generation pyrolysis simulation experimental device for centrifugal continuous gas sampling of a hydrocarbon source rock, including a centrifugal turntable, a motor, a quartz sample tube, a heating set, a cooling set, a rotary joint mounted coaxially with a rotating shaft of the centrifugal turntable, a vacuum pump, and vacuum gas collecting pipes, wherein a sealing plug is arranged at an orifice of the quartz sample tube, a thermocouple and a first exhaust pipeline connected with an inlet of the rotary joint are mounted on the sealing plug, the rotary joint is communicated with a vacuum pump through a second exhaust pipeline, a plurality of vacuum gas collecting pipes are respectively communicated with the second exhaust pipeline through an electromagnetic valve, a vacuum pump switching valve is mounted on the second exhaust pipeline at an inlet end of the vacuum pump, and a control circuit board is mounted on the centrifugal turntable.