Two-Component Nozzle for Cement Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for cooling cement or cement-like powders using liquid nitrogen result in insufficient thermal contact, leading to inefficient cooling and potential icing of dedusting filters, along with pulsatile flow disturbances and substance loss.
Innovation Solution
A two-component nozzle is used to introduce the cement or cement-like powder and cooling medium into a silo, ensuring direct and intense mixing only at the nozzle opening, avoiding phase transitions within the conveying line and promoting effective heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If liquid nitrogen is sprayed into the cement silo via a separate feed line, then cooling is attempted, but sufficient thermal contact is not achieved and nitrogen escapes unused
Solution Approach 1:
The patent combines the cement conveying line and liquid nitrogen supply line into a single integrated two-component nozzle system. This merging ensures that liquid nitrogen and cement are introduced simultaneously and mix intensely at the nozzle opening, achieving sufficient thermal contact and effective heat transfer that was not possible with separate feed lines.
Solution Approach 2:
The two-component nozzle acts as an intermediary device that facilitates direct contact between liquid nitrogen and cement particles. The nozzle design creates a mixing area where the cooling medium and cement are forced into intimate thermal contact, enabling efficient heat transfer and preventing nitrogen from escaping unused.
2Temperature
If liquid nitrogen is introduced via a socket in the cement line, then cooling is attempted, but homogeneous heat exchange is not achieved
Solution Approach 1:
The patent integrates the cement conveying and liquid nitrogen supply into a single two-component nozzle system, ensuring simultaneous introduction and intense mixing at the nozzle opening. This merging achieves homogeneous heat exchange that was not possible with separate socket introduction.
3Temperature
If liquid nitrogen is injected into the substance flow via a Venturi nozzle, then cooling is attempted, but phase transition causes high gas development and flow blocking
Solution Approach 1:
The patent extracts the phase transition process from the conveying line by designing the two-component nozzle so that liquid nitrogen mixes with cement and undergoes phase change only after exiting the nozzle into the silo. This prevents gas development and flow blocking within the conveying line, ensuring continuous material flow while still achieving effective cooling.
4Temperature
If mixing of cement and nitrogen occurs inside the conveying line, then cooling is attempted, but gas development causes pulse-like flow disturbances
Solution Approach 1:
The patent extracts the mixing and phase transition process from the conveying line by positioning the two-component nozzle at the end of the line. Cement and liquid nitrogen are conveyed separately to the nozzle, where they mix and the nitrogen undergoes phase change only after exiting into the silo. This eliminates gas development during conveying, ensuring stable, pulse-free material flow.
Solution Approach 2:
The two-component nozzle serves as an intermediary that separates the conveying function from the mixing/phase change function. It allows cement and liquid nitrogen to be conveyed efficiently to the mixing zone without premature gas development, then enables intense mixing and cooling only after the material has reached the silo.
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
This approach ensures even material flow, efficient heat transfer, and reduced environmental burden by minimizing gas development and dust loss, while optimizing the use of cooling medium.
Implementation Method 1
the cement or the cement-like substance and the cooling medium are injected into a silo at a two-component nozzle opening into the silo and mixed in a mixing area of the two-component nozzle. Both streams of material come into thermal contact only directly at the nozzle
Implementation Method 2
the phase transition of the cooling medium, therefore takes place at least to a significant extent only outside the nozzle and thus the delivery line
Implementation Method 3
When it comes into contact with the cement, the nitrogen vaporizes and is discharged as a gas
Implementation Method 4
the two-component nozzle is designed in such a way that a jet of cement or the cement-like substance is received within a jet of cooling medium when it emerges from the two-component nozzle
Data Source
Figure 1~2
AI summary
The method involves spraying a cooling medium and a cement or cementitious powder by a two component nozzle (8) into a silo (10). The medium and the cement or cementitious powder is intermixed in the mixing region of the nozzle, which discharge into the silo. The nozzle is formed in such a manner that a material stream of the cement or cementitious powder is absorbed within a cooling medium stream during the discharge from the nozzle. An independent claim is also included for a device for cooling cement or cementitious powder.