System and method for drum level control in a drum of a heat recovery steam generator
US-2015090202-A1 · Apr 2, 2015 · US
Method for operating a waste heat steam generator
US10948178B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10948178-B2 |
| Application number | US-201616314905-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 5, 2016 |
| Priority date | Aug 5, 2016 |
| Publication date | Mar 16, 2021 |
| Grant date | Mar 16, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A method for operating a waste heat steam generator, in particular one designed according to the forced flow principle, having an evaporator, through which a flow medium flows; an economizer having a number of economizer heating surfaces, and having a bypass line, which on the flow medium side is connected in parallel to a number of economizer heating surfaces. A variable that is characteristic of the heat energy supplied to the waste heat steam generator for controlling or regulating the flow rate of the bypass line is used, wherein the regulating or controlling of the flow rate of the flow medium through the bypass line takes place at the inlet of the evaporator subject to a supercooling target value. The regulating or controlling of the flow rate of the flow medium through the bypass line also takes place at the outlet of the evaporator subject to an overheating target value.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for operating a waste heat steam generator, comprising an evaporator through which a flow medium flows, an economizer comprising a number of economizer heating surfaces, and a bypass line connected in parallel with the number of economizer heating surfaces on a flow medium side, the method comprising: supplying a variable that is characteristic of heat energy to the waste heat steam generator to regulate or control a flow rate of the flow medium through the bypass line, wherein a regulation or control of the flow rate of the flow medium through the bypass line is carried out as a function of a supercooling setpoint at an inlet of the evaporator, and wherein the regulation or control of the flow rate of the flow medium through the bypass line is also carried out as a function of a superheating setpoint at an outlet of the evaporator, wherein the superheating setpoint is predefined as a setpoint for an outlet temperature of the flow medium at the evaporator; measuring a temperature of the flow medium at the outlet of the evaporator; increasing the flow rate of the flow medium through the bypass line when the measured temperature of the flow medium is under the superheating setpoint; and lowering the flow rate of the flow medium through the bypass line when the measured temperature of the flow medium exceeds the superheating setpoint. 2. The method as claimed in claim 1 , wherein the supercooling setpoint is predefined as a setpoint for an inlet temperature of the flow medium at the evaporator. 3. The method as claimed in claim 1 , wherein the waste heat steam generator is designed according to a forced flow principle.
Assignees
Inventors
Classifications
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10948178B2 cover?
- A method for operating a waste heat steam generator, in particular one designed according to the forced flow principle, having an evaporator, through which a flow medium flows; an economizer having a number of economizer heating surfaces, and having a bypass line, which on the flow medium side is connected in parallel to a number of economizer heating surfaces. A variable that is characteristic…
- Who is the assignee on this patent?
- Siemens Ag, Siemens Energy Global Gmbh & Co Kg
- What technology area does this patent fall under?
- Primary CPC classification F22D1/12. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 16 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).