Add Shortcode for disqus embed.

wordpress-disqus-shortcode.php

function disqus_embed($disqus_shortname) {
    global $post;
    wp_enqueue_script('disqus_embed','http://'.$disqus_shortname.'.disqus.com/embed.js');
    echo '<div id="disqus_thread"></div>
    <script type="text/javascript">
        var disqus_shortname = "'.$disqus_shortname.'";
        var disqus_title = "'.$post->post_title.'";
        var disqus_url = "'.get_permalink($post->ID).'";
        var disqus_identifier = "'.$disqus_shortname.'-'.$post->ID.'";
    </script>';
}

<?php disqus_embed('THE SHORTNAME OF YOUR DISQUS'); ?>

If you adapt it to

add_shortcode('disqus-inserter', 'disqus_embed');
function disqus_embed() {
    global $post;
    wp_enqueue_script('disqus_embed','http://example.disqus.com/embed.js');
    return '<div id="disqus_thread"></div>
    <script type="text/javascript">
        var disqus_title = "'.$post->post_title.'";
        var disqus_url = "'.get_permalink($post->ID).'";
        var disqus_identifier = "example-'.$post->ID.'";
    </script>';
}

You can set the sitewide disqus account instead of "example" and insert anywhere into a post template using Divi, Beaver Builder or Types / WP Toolset using the shortcode [disqus-inserter]