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add_action( 'template_redirect', 'wpse_45164_redirect_press' );
 
function wpse_45164_redirect_press()
{
  
  if ( ! is_singular( 'project' ) )
      return;
 
  global $post;
  $link = home_url() . '/projects/#' . $post->post_name;
 
  wp_redirect(  $link, 301 );
  exit;
}