Sloppy Joes

5 lbs. ground beef
3/4 C diced onions
1/3 C chopped celery
1/2 C diced green peppers
1 Tbls. dry mustard
1 Tbls. worchestershire sauce
1 Tbls. salt
1/4 C lemon juice
1/2 C white vinegar
1/2 C water
1 Qt. catsup
1/2 C brown sugar