Experimental waste liquid pretreatment device

The utility model discloses a pretreatment device for experimental waste liquid, which belongs to the technical field of experimental waste water treatment and comprises a waste liquid filter, a water inlet column connected with a water inlet pipe is arranged at one end of the filter, and a water inlet channel communicated with the water inlet column is arranged in the filter. A first filtering part is in threaded connection with the interior of the water inlet column, a water outlet is formed in the side wall of the filter, a drain outlet which is in radial symmetry with the water outlet is formed in the other side wall of the filter, a connecting column is connected to the other end of the filter, and a second filtering part is detachably installed between the connecting column and the water inlet channel through a bolt; and through the arrangement of the second filtering part, the experimental waste liquid can be further filtered and pretreated, so that most particulate matters in the waste liquid can be f