Sewage treatment device
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a sewage treatment device.
Background
The aeration treatment of sewage is a treatment method in which air is forcibly added into sewage to make the sewage in the tank contact with the air for oxygenation, and contact of organic matters in the tank with microorganisms and dissolved oxygen is strengthened to carry out oxidative decomposition on the organic matters in the sewage.
Disclosure of Invention
The invention provides a sewage treatment device, wherein aeration parameters and/or parameters of an aeration mechanism can be adaptively adjusted according to data such as actual treatment working conditions.
The system comprises a dissolved oxygen measuring instrument, four aeration points arranged in a sewage body in two rows and two columns, and a control part;
the dissolved oxygen measuring instrument is arranged in the aeration blank area and is used for detecting the content of the dissolved oxygen in the sewage in the area, the aeration blank area is a middle water area of the water areas surrounded by the four aeration points, and the aeration effect of the area is the lowest as the area is positioned at the farthest position of the aeration action range of each aeration point;
aeration point includes air-blower, gas transmission pipeline, shower nozzle and drives the first drive arrangement of shower nozzle lift in sewage body, wherein, the shower nozzle includes:
the air inlet is fixedly arranged at the tail end of the air pipeline;
the fairing is fixedly arranged on the air inlet, and the upper surface of the fairing is provided with a plurality of air holes;
a wedge-shaped splitter having a tip mounted downwardly within the fairing, the tip being hinged to an inner sidewall of the fairing;
the second driving device is connected with the shunt and is used for driving the shunt to swing in the fairing;
the upper end of the flow divider divides the air outlet of the fairing into two air outlet areas, the opening sizes of the two air outlet areas are changed due to the swing of the flow divider in the fairing, and the aeration air flow from the air transmission pipeline is guided by the wedge surface of the flow divider to be divided into the air outlet areas and is sprayed out from the air holes on the upper surface of the fairing at an inclined angle;
the control section is configured to:
(1) when the dissolved oxygen measuring instrument detects that the dissolved oxygen content of the sewage is smaller than a first value, the second driving device is controlled to drive the flow divider to move towards the direction far away from the aeration blank area, so that the opening of the air outlet area at one side of the fairing far away from the aeration blank area is reduced, the opening of the air outlet area at one side close to the aeration blank area is increased, more gas is sprayed to the aeration blank area, and meanwhile, the first driving device is controlled to drive the spray head to repeatedly lift in the water body, so that the uniform distribution and dissolution speed of the oxygen in the sewage water body are accelerated;
(2) along with the improvement of the dissolved oxygen content of the water body in the aeration blank area, the second driving device is controlled to drive the flow divider to gradually move towards the direction close to the aeration blank area, so that the opening of the air outlet area at one side of the fairing close to the aeration blank area is reduced, the opening of the air outlet area at one side of the aeration blank area is increased, and the aeration effect of a wider water area outside the aeration blank area is ensured.
The invention has the beneficial effects that: the working state of the aeration point can be changed according to the water body dissolved oxygen content information of the aeration blank area collected by the dissolved oxygen measuring instrument, so that the gas is close to the area as much as possible, and the balanced aeration of each area of the sewage is realized.
Drawings
FIG. 1 shows a schematic structural view of a showerhead;
FIG. 2 shows a schematic view of a sewage treatment plant and its aeration range;
fig. 3 shows a block diagram of the components of the present invention.
Detailed Description
The structure of the present system and the functions performed are described in detail below with reference to the accompanying drawings.
A sewage treatment device comprises a dissolved oxygen measuring instrument 1, four aeration points 2 which are arranged in a sewage body in two rows and two columns, and a control part 3, wherein,
the dissolved oxygen measuring instrument 1 is arranged in an aeration blank area and is used for detecting the content of the dissolved oxygen in the sewage in the area, the aeration blank area is a middle water area of water areas surrounded by four aeration points, and the aeration effect of the area is the lowest as the area is positioned at the farthest position of the aeration action range of each aeration point;
the aeration point 2 comprises a blower 21, a gas transmission pipeline 22, a spray head and a first driving device 27 for driving the spray head to lift in the sewage body (including but not limited to a structure using a lifting rod and the like), wherein the spray head comprises:
an air inlet 23 fixedly installed at a distal end of the gas transmission pipe 22;
a cowling 24 fixedly attached to the air inlet 23 and having a plurality of air holes formed in an upper surface thereof;
a wedge-shaped flow diverter 25 mounted inside the cowl 24 with its tip facing downwards;
a second drive means 26 connected to the flow divider 25 for moving the flow divider within the fairing;
the upper end of the flow divider 25 divides the air outlet of the fairing 24 into two air outlet areas, the opening sizes of the two air outlet areas are changed due to the movement of the flow divider 25 in the fairing 24, and the aeration airflow from the air transmission pipeline is guided by the wedge surfaces of the flow divider to be divided into the air outlet areas and is sprayed out from the air holes on the upper surface of the fairing at an inclined angle;
the control section 3 is configured to:
(1) when the dissolved oxygen measuring instrument 1 detects that the dissolved oxygen content of the sewage is less than a first value, the second driving device 26 is controlled to drive the flow divider 25 to move towards the direction far away from the aeration blank area, so that the opening of the air outlet area at one side of the fairing 24 far away from the aeration blank area is reduced, the opening of the air outlet area at one side close to the aeration blank area is increased, more air is sprayed to the aeration blank area, and meanwhile, the first driving device 27 is controlled to drive the spray head to repeatedly lift in the water body, so that the uniform distribution and dissolution speed of the oxygen in the sewage water body are accelerated;
(2) along with the increase of the dissolved oxygen content of the water body in the aeration blank area, the second driving device 26 is controlled to drive the flow divider 25 to move towards the direction close to the aeration blank area, so that the opening of the air outlet area at one side close to the aeration blank area on the fairing 24 is reduced, and the opening of the air outlet area at one side far away from the aeration blank area is increased, and the aeration effect of a wider water area outside the aeration blank area is ensured.
It will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention as shown in the specific embodiments without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Likewise, the invention encompasses any combination of features, in particular of features in the patent claims, even if this feature or this combination of features is not explicitly specified in the patent claims or in the individual embodiments herein.