This facility, which is small and really still basically a prototype, scrubs 4K tons. However future facilities that are currently in the works will scrub 1M tons. That brings you to the 30,000 facilities to meet existing demand. Google tells me that there are 62,500 power plants in existence currently, so it would seem that 30,000 capture plants is entirely feasible.
The thing is, these plants are in Iceland for a reason: they can't be anywhere like powerplants, they need to depend on a clean energy source that is also for some reason not easy to use for other means. Such constraints aren't solved that easily.
Finding the energy for 30k plants that are 250* more productive than this one (which, the article says, is the most efficient to date) is still kind of a problem.
