Condensate Stripper Start-Up Using Boiler Feed Water Preheating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for starting up steam reforming processes face challenges due to the need for additional tanks or external disposal of contaminated condensate during the start-up phase, leading to increased capital and operational costs, and inefficiencies in removing organic by-products.
Innovation Solution
A method and apparatus that utilize a connection between the boiler water feed line and the condensate stripper to introduce clean water from the steam boiler, allowing the condensate stripper to reach thermal equilibrium before contaminated condensate is introduced, thereby eliminating the need for intermediate storage tanks and ensuring efficient removal of organic impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the condensate stripper is started up by passing condensate through the column first and then heating with steam, then thermal problems within the column are avoided, but additional storage tanks and conveying equipment are required, increasing capital costs and plant size
Solution Approach 1:
The invention applies preliminary action by heating the condensate stripper column with steam before introducing the condensate stream. The method involves first heating the stripping section and condensing section with steam to establish proper temperature distribution, then introducing the condensate stream only after the column has reached appropriate operating temperatures. This prevents thermal shock and ensures stable operation from the start, eliminating the need for additional storage tanks and conveying equipment that would be required if condensate were introduced first.
Solution Approach 2:
The invention inverts the conventional start-up sequence. Instead of the traditional approach where condensate is passed through the column first and then heating is applied, the method reverses the order by applying steam heating first to establish thermal conditions, and only then introducing the condensate stream. This inversion of the start-up sequence resolves the technical contradiction by ensuring thermal stability without requiring additional storage infrastructure.
2Reliability
If additional storage tanks are provided for contaminated condensate during start-up, then thermal stability is maintained, but capital costs and plant size increase
Solution Approach 1:
The invention applies preliminary action by establishing the thermal regime in the condensate stripper before introducing the condensate stream. Steam is used to heat the stripping section and condensing section to appropriate temperatures first, ensuring that when the condensate is introduced, the column is already in a stable thermal state. This eliminates the need for additional storage tanks and reduces both capital costs and plant size while maintaining thermal stability.
3Temperature
If the condensate stripper is heated with steam during start-up before steady state is established, then thermal equilibrium is achieved, but organic by-products are not completely removed from the condensate, requiring external treatment or storage
Solution Approach 1:
The invention applies preliminary action by first establishing the thermal regime through steam heating, then introducing the condensate stream once appropriate temperatures are achieved. The method involves heating the stripping section to a first temperature and the condensing section to a second temperature before condensate introduction. This ensures that the column is in a stable thermal state capable of effectively removing organic by-products, eliminating the need for external treatment or storage facilities.
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
Enables a seamless start-up process without additional tanks, reduces capital and operational costs, and ensures continuous operation with full separating capacity from the outset, maintaining thermal and hydraulic stability.
Implementation Method 1
the column is cautiously heated with steam until the steady state is established
Implementation Method 2
the organic constituents are desorbed from the condensate by means of steam under pressure
Implementation Method 3
After this process, the gas mixture is typically cooled down wherein a condensate is formed
Data Source
AI summary
An apparatus for steam reforming includes a reactor, a condensate separator, a condensate stripper, and a steam boiler. The reactor produces hydrogen and is connected to the condensate separator such that a gas mixture is conducted from the reactor into the condensate separator. The condensate separator and the condensate stripper are connected so that condensate separated out in the condensate separator is conducted into the condensate stripper. The condensate separator and the steam boiler are connected such that cleaned condensate can be conducted into the steam boiler. The steam boiler is connected to the reactor and to the condensate stripper in a steam-conducting manner. The boiler water feed line of the steam boiler is connectable to the condensate stripper in a liquid-conducting manner. A supply from the boiler water feed line is at a same location of the condensate stripper as a supply of the condensate from the condensate separator.