Automated Steam Reformer Start-Up Control System

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Solution Overview

Problem

Steam reformer start-up processes are time-consuming and require significant personnel and resources, leading to high costs and a high risk of errors or damage due to manual operation, with up to 90% of errors occurring during this phase.

Innovation Solution

An automated start-up system for steam reformers using a burner arrangement with three groups of burners (pilot, start-up, and non-start-up) that allows for indirect temperature-dependent ignition, enabling a fully automated start-up process without manual intervention, reducing the risk of human error and optimizing process control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual operation is used for start-up, then personnel can monitor and adjust parameters, but start-up time is significantly extended and personnel requirements increase

Engineering Contradiction:

Improveparameter monitoring reliabilityVSAvoidstart-up time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces manual mechanical operations with an automated control system that electronically monitors and adjusts burners, valves, and process parameters. The control unit automatically manages the start-up sequence, substituting human operators with automated sensing and actuation systems, thereby reducing start-up time while maintaining monitoring reliability through continuous electronic feedback.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If manual control is used for burners and valves, then operational flexibility is maintained, but the risk of errors and damage increases significantly

Engineering Contradiction:

Improveoperational flexibilityVSAvoidoperational safety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements continuous feedback loops where sensors monitor temperature, pressure, and burner status, and the control unit automatically adjusts valve positions and burner operation based on this feedback. This closed-loop control maintains operational flexibility through adaptive response while eliminating human error, as the system self-corrects deviations from safe operating parameters in real-time.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The control system performs self-monitoring and self-adjustment during the start-up process, automatically detecting anomalies and correcting operational parameters without human intervention. The system serves itself by autonomously managing the complex sequence of burner ignition, temperature control, and valve coordination, thereby maintaining flexibility while ensuring consistent safety standards.

Inventive Principle:

Principle #25Self-service

3Reliability

If temperature gradient is limited for safety, then equipment damage is prevented, but start-up process becomes significantly slower

Engineering Contradiction:

Improveequipment safetyVSAvoidstart-up rate

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent employs dynamic control of the temperature gradient, where the control unit continuously adjusts heating rates based on real-time sensor data and process conditions. The system can safely increase the temperature gradient when conditions permit and reduce it when approaching safety limits, optimizing the start-up rate while maintaining equipment safety through adaptive, condition-based control rather than fixed conservative limits.

Inventive Principle:

Principle #15Dynamics

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 automated system significantly reduces start-up time by 25-50% and minimizes personnel outlay, enhancing operational safety and reliability by standardizing and systematically monitoring the process, while allowing for flexible operation and reduced material costs.

Implementation Method 1

a temperature level of, for example, 700° C. in the reactor (reformer tubes) may be mentioned as lower limit for normal operation

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

A temperature gradient of, for example, 50 K/h may be mentioned as a normal maximum load of a plant

Methodology Applied

Scientific EffectTemperature gradient control: Temperature Gradient

Data Source

PatentUS12138611B2Apparatus and method for automatable start-up of a steam reformer arrangement into a normal operating state, and use and open-loop control/closed-loop control device and computer program product

Publication Date: 2024.11.12 THYSSENKRUPP UHDE GMBH

AI summary

A method can be utilized to startup into a normal operating state a steam reformer arrangement for the production of hydrogen, methanol, or ammonia. A plurality of burners that are coupled to at least one reactor having reformer tubes may be controlled and regulated. In particular, startup may be performed out and regulated in an automated manner by the burners ensuring normal operation, in particular non-startup burners, being ignited indirectly as a function of temperature by means of burners provided specifically for startup, in particular pilot burners and startup burners, as a function of automatically evaluated flame monitoring at least at the pilot burners. This method provides time savings and savings of outlay in terms of personnel and also high operational reliability.