4results about How to "Reduce production pollution" patented technology

The invention discloses an overturning material pouring device which comprises a control device and a belt conveyor and further comprises a fixed support, and the belt conveyor is rotationally connected to the upper portion of the fixed support through a connecting assembly; the driving mechanism is connected to the upper portion of the outer portion of one side of the fixed support, and the driving mechanism is in transmission connection with the connecting assembly on the side; the rack is connected above the two sides of the belt conveyor; the clamping assemblies are symmetrically arranged in the middle of the lower portion of the rack; the clamping assembly is arranged above the machine frame; wherein the belt conveyor and the driving mechanism are both connected with the control equipment. The device is safe, practical, stable, reliable, convenient and reliable to maintain, wide in application range and high in flexibility, the production efficiency is improved, the pollution problem is solved, the production pollution is reduced, and the related requirements of cost reduction and efficiency improvement of enterprises are met; the device meets the gunny bag pouring process requirement, and the production requirement of full-process automation is guaranteed.

The utility model relates to the technical field of silicon material processing discloses multistage linkage type hammering crushing device for silicon material crushing, including hollow protective housing, the top rotation of hollow protective housing is connected with sealing mechanism, sealing mechanism is used for automatic to top seal, the inner wall rotation of hollow protective housing is connected with crushing mechanism, the left side fixed connection of hollow protective housing has drive mechanism, the front side fixed connection of hollow protective housing has dust extraction mechanism, sealing mechanism includes rotation axis no.

The invention relates to preparation of indoor potting solid water, and belongs to the field of solid water preparation.The preparation method comprises the steps that nitrogen is introduced into a four-opening flask for 10 min, air is removed, wheat bran and wheat B starch wastewater are added, heating and stirring are conducted to be uniform, sodium alginate and gellan gum are added, and mixing is conducted to prepare a solution A; the preparation method comprises the following steps: adding a 25% NaOH solution into acrylic acid under an ice-water bath condition for neutralization, cooling a neutralized solution to room temperature, adding 2-acrylamide-2-methylpropanesulfonic acid, bentonite, methylene bisacrylamide and potassium persulfate, and fully and uniformly stirring to obtain a solution B; slowly adding the solution B into the solution A, heating, stirring, carrying out polymerization reaction, filtering after the reaction is ended, and washing with absolute ethyl alcohol and distilled water, so as to obtain the special solid water for indoor potting. The indoor potting solid water provided by the invention can provide convenience for workers to maintain potting plants, can improve soil permeability and water absorption and retention capability, has a long service cycle, is prepared from natural degradable materials, and has low cost.

The invention discloses a method for preparing melatonin, and belongs to the technical field of drug synthesis. The method uses 5-methoxyindole and N-acetylglycine as raw materials, and prepares melatonin in a one-pot method through Friedel-Crafts acylation reaction, and obtains a melatonin competitor through recrystallization. The method for synthesizing melatonin provided by the invention avoids the low yield caused by step-by-step purification, has a short synthesis route, saves production costs and reduces pollution compared with traditional processes.