Depending on what constraints you have on the dependence between sentences, you could have

Independent sentences: Each sentence modeled individually. (batch_size*num_sentences, sentence, embeddings)
Independent paragraphs: Each paragraph(sequence of sentences) modeled independently. (batch_size, num_sentences*sentence, embeddings)

Alternatively, you could have two layers of LSTM, one modeling and embedding individual sentences, the second taking these sentence embeddings as input and modeling paragraphs