First of all, the LHC is not an object that has a mouth or a digestive system. It does not have the ability to swallow anything.

Second, the LHC is not even powerful enough to destroy planet earth. The energy of Proton, the subatomic particle accelerated by LHC, is 6.5 teraelectronvolts (TeV). This energy is far less than the energy required to destroy the whole Earth. The estimated energy required to destroy the earth is 2\(\times\)10^{32} joules. LHC energy is only 1.625\(times\)10^{-7} joules.

The LHC could potentially create miniature black holes, but these would be immediately too tiny to consume Earth.