Papermaking wastewater precipitation and recovery device for papermaking

Abstract

The invention discloses a papermaking wastewater precipitation and recovery device for papermaking, relates to the technical field of papermaking wastewater treatment, and aims to solve the problem that a filter screen is prone to being damaged due to the fact that the filter screen is subjected to large pressure when squeezing waste water. The device specifically comprises a protective shell, a first filter screen is arranged on the inner wall of the protective shell, a water inlet is formed in the outer wall of the top of the first filter screen, a water inlet pipe is arranged on the inner wall of the water inlet, a precipitation bin is arranged on the inner wall of the bottom of the protective shell, a rectangular groove is formed in the outer wall of the top of the protective shell, and a second filter screen is arranged on the inner wall of the rectangular groove. By arranging the buffer plates and the buffer holes, the interior of the precipitation bin can be divided into a plurality of small spaces by the buffer plates, and when water flow flows into the precipitation bin from the interior of the water inlet, the divided small spaces can effectively buffer impact of the water flow; and the problem that settled waste residues are rolled up due to too fast water flow in the settling bin is avoided.

Description

technical field [0001] The invention relates to the technical field of papermaking wastewater treatment, in particular to a papermaking wastewater precipitation recovery device for papermaking. Background technique [0002] In the process of paper production, a large amount of waste water will be produced. The sewage discharged from the paper mill will pollute the environment. The following points pollute the water source. In addition to harmful chemical inorganic substances, the printing and dyeing sewage also contains volatile phenols, precipitated solids, Suspended solids, lignin and other organic matter, among them, after the sewage is left to stand, a large amount of precipitation will appear, which is also part of the sewage treatment process, but the sewage precipitation in the prior art has a long whole cycle, if the standing time is not enough, If the sedimentation effect is not good, it will cause the waste of some pulp, which is not conducive to the secondary util...

AI Technical Summary

Problems solved by technology

[0002] In the process of paper production, a large amount of waste water will be produced. The sewage discharged from the paper mill will pollute the environment. The following points pollute the water source. In addition to harmful chemical inorganic substances, the printing and dyeing sewage also contains volatile phenols, precipitated solids, Suspended solids, lignin and other organic matter, among them, after the sewage is left to stand, a large amount of precipitation will appear, which is also part of the sewage treatment process, but the sewage precipitation in the prior art has a long whole cycle, if the standing time is not enough, If the sedimentation effect is not good, it will cause the waste of some pulp, which is not conducive to the secondary utilization of pulp, and when the sewage after sedimentation is pumped out, the sediment may be rolled up due to the flow of water, which will affect the sediment and sewage. The separation effect, so the existing technology can not meet the needs of people

[0003] After searching, the Chinese patent application number is CN110368742A, which discloses a papermaking waste water sedimentation and recovery device for papermaking, including a box body, the bottom of the box body is fixedly connected with a base, and a filter screen is provided under the inner wall of the box body , the outer wall of the filter screen is fixedly connected with a rubber ring, the outer wall of the rubber ring is attached to the inner wall of the box, and the upper left side of the outer wall of the box is provided with a water inlet pipe, but the above technical solution is due to the use of filter The screen squeezes and filters the papermaking wastewater, so there is a problem that the filter screen will be under a lot of pressure when the waste water is squeezed, which will cause the filter screen to be easily damaged.

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