CN111170443A

CN111170443A - Multilayer aeration equipment

Info

Publication number: CN111170443A
Application number: CN201811332491.4A
Authority: CN
Inventors: 史红桂
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-09
Filing date: 2018-11-09
Publication date: 2020-05-19

Abstract

The invention relates to a multilayer aeration device, which comprises an aeration tank, wherein a horizontal aeration main pipe is arranged at the top of the aeration tank, one end of the aeration main pipe is connected with a Roots blower, a ball valve is arranged at the other end of the aeration main pipe, the middle part of the aeration main pipe is connected with a vertical main aeration pipe through a tee joint, the main aeration pipe is coaxial with the aeration tank, the main aeration pipe is connected with a plurality of aeration impellers in series from top to bottom, each aeration impeller comprises a mounting part and a plurality of uniformly distributed hollow aeration blades, each aeration blade is provided with a plurality of aeration holes, the central mounting part of each aeration impeller is communicated with the main aeration pipe, and each aeration blade is communicated.

Description

Multilayer aeration equipment

Technical Field

The invention relates to an aeration tank, in particular to a multilayer aeration device for the aeration tank.

Background

Alcohol is a very important industrial raw material, and can be used in the fields of solvents, reaction reagents, medical materials, food materials and the like. At present, the annual yield of alcohol in China is over 900 ten thousand tons. The preparation process of the alcohol comprises five steps of crushing, cooking, saccharifying, fermenting, distilling and the like, and the purity of the obtained edible alcohol can reach more than 99.5 percent. In the fermentation stage, urea, nitrate and other nutrients as yeast are added to ferment glucose to obtain the product alcohol, and the residual alcohol wastewater at the bottom of the distillation tower contains high COD and nitrogen: generally, the COD of the raw liquor of the alcohol wastewater is about 40000-50000, and the total nitrogen content is about 450-600. Therefore, the alcohol wastewater can be discharged after biochemical treatment.

Anaerobic-aerobic process (a/O process) is a very effective technique for treating COD and total nitrogen. Wherein the aeration tank has the following two functions: firstly, nitration reaction, namely converting ammonia salt in an anaerobic pool into nitrate nitrogen salt to prepare for the next denitrification process, and secondly, decomposing organic matters in the wastewater into inorganic matters. Therefore, the aeration tank has important significance for reducing COD and total nitrogen. The amount of Dissolved Oxygen (DO) in the aeration tank is an important internal control index in the aeration tank, and if the aeration is insufficient, the activity of aerobic bacteria is inhibited, and the efficiency of the aeration tank is affected.

The common aeration device is arranged at the bottom of the aerobic tank. If the height of the aerobic tank is deeper, the DO concentration in the area close to the aeration pipe is higher in the aeration process, and the DO concentration gradually decreases along with the increase of the distance from the aeration pipe. The uneven distribution of DO is easy to cause the defects of inconsistent bacterial activity, larger DO test error and the like, and then the technological result is influenced. The deeper the aeration tank, the more affected.

Disclosure of Invention

The invention aims to provide an aeration device which is suitable for a deep aeration tank and can quickly and efficiently provide uniformly dissolved oxygen in the aeration tank.

The technical scheme adopted by the invention is as follows:

the utility model provides a multilayer aeration equipment, includes the aeration tank, and the top of aeration tank is equipped with horizontal aeration house steward, and roots's fan is connected to aeration house steward's one end, and the ball valve is installed to the aeration house steward other end, there is vertical main aeration pipe at aeration house steward's middle part through three way connection, and main aeration pipe is coaxial with the aeration tank, main aeration pipe top-down has concatenated a plurality of aeration impellers, each aeration impeller includes the cavity aeration blade of installation department and a plurality of equipartitions, is equipped with a plurality of aeration holes on each aeration blade, and aeration impeller's central installation department and main aeration pipe UNICOM, each aeration blade and installation department UNIC.

After the technical scheme is adopted, the invention has the beneficial effects that: for the deep aeration tank, a multi-layer aeration mode is adopted to ensure that the DO value difference of wastewater between the upper layer and the lower layer of the aeration tank is not large, and an impeller type aeration mode is adopted, so that the aeration range is large, the aeration is uniform, and the DO test error is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of an aeration impeller.

Detailed Description

The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings:

as shown in the figure, the multilayer aeration device comprises an aeration tank 1, wherein a horizontal aeration main pipe 2 is arranged at the top of the aeration tank 1, one end of the aeration main pipe 2 is connected with a Roots blower 3, the other end of the aeration main pipe 2 is provided with a ball valve 4, the middle part of the aeration main pipe 2 is connected with a vertical main aeration pipe 6 through a tee joint 5, the main aeration pipe 6 is coaxial with the aeration tank 1, the main aeration pipe 1 is connected with a plurality of aeration impellers 7 in series from top to bottom, and the aeration impeller 7 at the bottommost part is arranged at the tail end of the aeration main pipe 2; each aeration impeller 7 comprises a mounting part 71 and a plurality of uniformly distributed hollow aeration blades 72, a plurality of aeration holes 73 are formed in each aeration blade 72, the number of the aeration blades 72 can be 3-6, the number of the aeration holes 73 on each blade 72 is 4-7, the central mounting part 71 of each aeration impeller 7 is communicated with the main aeration pipe 6, and each aeration blade 72 is communicated with the mounting part 71.

Claims

1. The utility model provides a multilayer aeration equipment, includes the aeration tank, and the top of aeration tank is equipped with horizontal aeration house steward, and roots's fan is connected to aeration house steward's one end, and the ball valve is installed to the aeration house steward other end, there is vertical main aeration pipe at aeration house steward's middle part through the three way connection, and main aeration pipe is coaxial with the aeration tank, its characterized in that, a plurality of aeration impeller have been concatenated to main aeration pipe top-down, each aeration impeller includes the cavity aeration vane of installation department and a plurality of equipartitions, is equipped with a plurality of aeration holes on each aeration vane, and aeration impeller's central installation department and main aeration pipe UNICOM, each aeration vane.