Compact Train Wash With Water Recirculation and Recovery
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Solution Overview
Problem
Existing train washing facilities are large, expensive, time-consuming, and inefficient, requiring significant water and amenities, making them difficult to site and operate effectively for regular cleaning.
Innovation Solution
A compact train wash system that recirculates water, using a water supply tank, heaters, water jets, rotatable brushes, a water recovery tray, and filtration system, with optional deionization and air jets, allowing for efficient cleaning with minimal water usage and reduced infrastructure needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated enclosed train washing facility is used, then effective cleaning is achieved, but the facility becomes very large and difficult to site
Solution Approach 1:
The train washing function is segmented from the large dedicated facility into a compact portable unit that can be positioned adjacent to the train. The washing apparatus is divided into separate functional modules including water storage tank, heater, pump system, and cleaning heads that can operate independently yet cooperatively
Solution Approach 2:
The washing system transitions from a two-dimensional floor space requirement (large facility) to a three-dimensional vertical configuration where the portable apparatus stands adjacent to the train, utilizing vertical space for water storage, heating, and delivery mechanisms
2Reliability
If a dedicated enclosed train washing facility is used, then cleaning is performed, but construction and operational costs become very expensive
Solution Approach 1:
The portable washing apparatus incorporates self-contained systems for water storage, heating, and recirculation. The apparatus collects and recycles its own wastewater through filtration systems, reducing the need for external water infrastructure and waste disposal facilities that would otherwise be required
Solution Approach 2:
The system recovers and recycles wastewater by collecting it in storage tanks, filtering out debris and contaminants, and redistributing the cleaned water for subsequent washing operations. This closed-loop water management eliminates the need for continuous fresh water supply and waste water disposal infrastructure
3Reliability
If a dedicated enclosed train washing facility is used, then cleaning is performed, but it becomes time consuming to use
Solution Approach 1:
The portable washing apparatus performs preliminary heating of water in its storage tank before the train arrives. The system can be pre-positioned and pre-heated, so that when the train is ready for washing, the hot water is already available, eliminating waiting time during the actual cleaning process
Solution Approach 2:
The recirculation system maintains continuous operation by constantly filtering and redistributing water during the washing process. The pump system operates continuously to deliver water to cleaning heads, and the filtration system runs concurrently to prepare water for reuse, eliminating idle time between washing stages
4Reliability
If a dedicated enclosed train washing facility is used, then cleaning is performed, but significant water consumption is required
Solution Approach 1:
The system recovers and recycles wastewater by collecting it in storage tanks, filtering out debris and contaminants, and redistributing the cleaned water for subsequent washing operations. This closed-loop water management reduces water consumption by reusing the same water multiple times
Solution Approach 2:
The recirculation system incorporates feedback mechanisms where the quality of used water is monitored and the recirculated water is selectively filtered and redistributed based on its condition. This ensures that water is reused only when it meets cleaning effectiveness standards, maintaining cleaning quality while minimizing water consumption
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 system significantly reduces water consumption, operational costs, and space requirements while maintaining effective cleaning efficiency, allowing for daily cleaning of trains without the need for separate washing facilities.
Implementation Method 1
a heater, for heating the water in the water supply tank
Implementation Method 2
one or more water jets, for directing water from the water supply tank onto a side of the train
Implementation Method 3
one or more rotatable brushes, for brushing against a region of the train onto which water is being or has been directed by the water jets
Implementation Method 4
a water recovery tray, for location beneath the side of the train, for collecting water running down the side of the train
Implementation Method 5
a filtration system, for filtering the water being recirculated from the water recovery tray to the water supply tank
Implementation Method 6
a deioniser is provided, for deionising the water being recirculated from the water recovery tray to the water supply tank
Implementation Method 7
one or more air jets is provided, for blowing water down the side of the train and into the water recovery tray
Data Source
AI summary
A train wash (1) for washing a train is described. The train wash comprises a water supply tank, for holding water for washing the train, a heater, for heating the water in the water supply tank, one or more water jets (14), for directing water from the water supply tank onto a side of the train, one or more rotatable brushes (4), for brushing against a region of the train onto which water is being or has been directed by the water jets, a water recovery tray, for location beneath the sides of the train, for collecting water running down the side of the train, a recirculation system, for recirculating water in the water recovery tray back to the water supply tank for reuse, and a filtration system, for filtering the water being recirculated from the water recovery tray to the water supply tank.