Q n A : Her husband has divorced her; can she ask the married imam of the mosque who has tried to help her to marry her?

Praise be to Allah.
Firstly: 

We ask Allaah to make your heart steadfast in adhering to
Islam, and to guide you to the best of actions and words, and to make
goodness easy for you, and to bless you with a righteous husband who will
help you to adhere steadfastly to His religion. 

Secondly: 

There is nothing wrong with a woman asking for marriage from
a righteous man who will help her to adhere to her religion. We have stated
that in the answer to question number
20916. 

But we advise you not to ask for that from this imam, for two
reasons: 

1.So as to preserve the dignity
of this imam before the people and to preserve your dignity, because your
first husband has spread the rumour that he (the imam) is the reason for the
separation between him and you, and if you marry him that will reinforce
this rumour and confirm it, which would lead to bad consequences for both of
you.

2.The marriage could fail or be
faced with problems if news of your marriage reaches the authorities in your
country. The one who tells them could be your first husband, seeking revenge
against you. The Muslim should not be the cause of harm to himself or to
others.

Hence we advise you to avoid thinking of this imam as a
husband for you. The good qualities that you see in him may be found in
someone else, and may be even greater. May Allaah make it easy for you to
find a righteous husband who is better than him, sooner rather than later. 

You could ask him to help you to look for a suitable husband
for you. 

If Allaah makes it easy for you to find a righteous husband,
then it is essential to have a guardian with regard to your marriage. As you
do not have anyone in your family who is Muslim, so none of them can act as
your guardian, then your guardian should be the imam of the Islamic centre
or some other Muslim who has standing in society and is known for religious
commitment, trustworthiness and wisdom. There is nothing wrong with
appointing this imam as your guardian to do the marriage contract for you, 

Shaykh al-Islam Ibn Taymiyah (may Allaah have mercy on him)
said: 

If the one who should be the guardian with regard to marriage
is not able to perform this function, then guardianship passes to the most
suitable of those who can be found, who have a kind of guardianship with
regard to matters other than marriage, such as the chief of the village,
leader of a caravan and so on. End quote. 

Al-Ikhtiyaaraat al-Fiqhiyyah, p.
530. 

See also the answer to question number
389. 

We advise you to be patient in putting up with the mockery of
your family because of your becoming Muslim, and do not give up calling them
to the goodness that Allaah has made easy for you; and persist in praying
for them to be guided, for Allaah may answer your supplication and guide
them to the truth to which He guided you. 

And Allaah knows best.