CN-117585809-B - Online monitoring device and method for concentration and flow of channel type internal reflux sludge of sewage plant

Abstract

The invention discloses a channel type internal reflux sludge concentration and flow on-line monitoring device and method for a sewage plant, wherein the device comprises a biochemical tank, a plurality of anaerobic tanks, a plurality of anoxic tanks and a plurality of aerobic tanks which are sequentially connected are arranged in the biochemical tank, a mixed liquid internal reflux channel is arranged between a first anoxic tank in the plurality of anoxic tanks and a last aerobic tank in the plurality of aerobic tanks, the mixed liquid internal reflux channel is used for inputting mixed liquid in the corresponding aerobic tank back to the corresponding anoxic tank, a wedge-shaped ultrasonic sensor is arranged in the mixed liquid internal reflux channel, the wedge-shaped ultrasonic sensor scans the mixed liquid in the mixed liquid internal reflux channel, and the scanning result is converted into an electric signal and is uploaded to a central control room of the sewage plant. The sewage plant central control room detects and calculates the flow rate and concentration by comparing the correlations between a plurality of images or echo modes which are sequenced in time sequence. The invention not only can rapidly and accurately obtain the flow data, but also can realize rapid disassembly and maintenance.

Inventors

• SUN YONG
• YIN XIQIN
• GU JIANSI
• LI HUI
• YANG RENWEI
• CHEN HUAN

Assignees

• 上海择希环保科技有限公司

Dates

Publication Date

20260505

Application Date

20231205

Claims (6)

1. 1. The channel type internal reflux sludge concentration and flow on-line monitoring device for the sewage plant comprises a biochemical tank, wherein a plurality of anaerobic tanks (9), a plurality of anoxic tanks (10) and a plurality of aerobic tanks (11) which are sequentially connected are arranged in the biochemical tank, and is characterized in that: A mixed liquid internal reflux channel (12) is arranged between the first anoxic tank (10) in the anoxic tanks (10) and the last aerobic tank (11) in the aerobic tanks (11); the mixed liquor internal reflux channel (12) is used for inputting the mixed liquor (8.7) in the corresponding aerobic tank (11) back to the corresponding anoxic tank (10); An internal reflux pump (8) is arranged in the last aerobic tank (11), and the mixed liquor (8.7) is input into the mixed liquor internal reflux channel (12) through the internal reflux pump (8); a wedge-shaped ultrasonic sensor (8.1) is arranged in the mixed liquid internal reflux channel (12); the wedge-shaped ultrasonic sensor (8.1) scans the mixed liquid (8.7) in the mixed liquid internal reflux channel (12), converts the scanning result into an electric signal and uploads the electric signal to a central control room of the sewage plant; a ballast cushion block (8.3) is arranged in the mixed liquid internal reflux channel (12); the lower surface of the wedge-shaped ultrasonic sensor (8.1) is fixedly connected with the ballast cushion block (8.3), and the wedge-shaped ultrasonic sensor is submerged at the bottom of the mixed liquid internal reflux channel (12) through the ballast cushion block (8.3); the wedge-shaped ultrasonic sensor (8.1) is placed in the channel through the ballast cushion block (8.3) and cannot be washed away by the flow velocity of water flow; The ballast cushion block (8.3) is connected with a stainless steel hook (8.8.6) on the bank of the mixed liquid internal reflux channel (12) through a stainless steel chain (8.8.7); The stainless steel chain (8.8.7) is provided with a chain tensioning device (8.8.8); The channel type internal reflux sludge concentration and flow online monitoring device for the sewage plant adopts a high-frequency continuous pulse ultrasonic cross-correlation flow detection technology, simultaneously captures suspended particles in 16 layers of the flow section, obtains layered flow of each layer through a correlation inversion algorithm by utilizing echo modes of the suspended particles in each layer, and digitally superimposes the overflow metering flow of each layer according to the geometric property and the size of the flow section, so as to obtain the real flow of the whole flow section.
2. 2. The on-line monitoring device for the concentration and flow rate of the channel type internal reflux sludge of the sewage plant according to claim 1, wherein the wedge-shaped ultrasonic sensor (8.1) is connected with a field instrument control cabinet (8.2) arranged on the bank of the mixed liquid internal reflux channel (12) through a power supply and control cable (8.4), and an electric signal is uploaded to a central control room of the sewage plant through the field instrument control cabinet (8.2).
3. 3. The on-line monitoring device for the concentration and flow rate of the channel type internal reflux sludge of the sewage plant according to claim 2, wherein the power supply and control cable (8.4) is fixed at the bottom and the inner side wall of the mixed liquid internal reflux channel (12) through a plurality of stainless steel pipe clamps (8.5).
4. 4. The on-line monitoring device for the concentration and flow of the channel type internal reflux sludge of the sewage plant according to claim 1, wherein a pool top catenary hoist (8.8) is arranged on the bank of the mixed liquid internal reflux channel (12); The pool top catenary lifting hoist (8.8) is fixed on the bank of the mixed liquid internal reflux channel (12) through a ground leg (8.8.2); the ground leg (8.8.2) is sequentially provided with a rotary adjusting disc (8.8.3) and a stainless steel straight rod (8.8.4).
5. 5. The on-line monitoring device for the concentration and flow of the channel type internal reflux sludge of the sewage plant according to claim 4, wherein the upper end of the stainless steel straight rod (8.8.4) is provided with a stainless steel inclined support rod (8.8.5) comprising a hoisting nylon pulley; The stainless steel diagonal support rod (8.8.5) comprising the hoisting nylon pulley is penetrated with a stainless steel catenary (8.8.1); When the mixed liquid internal reflux channel (12) is maintained, the position of the stainless steel diagonal support rod (8.8.5) is adjusted through the rotating adjusting disc (8.8.3), and the wedge-shaped ultrasonic sensor (8.1) is lifted through the stainless steel catenary (8.8.1).
6. 6. The detection method of the channel type internal reflux sludge concentration and flow on-line monitoring device for the sewage plant according to claim 1, wherein the wedge-shaped ultrasonic sensor (8.1) emits ultrasonic pulses (8.6) with a fixed angle range every 1 to 10 milliseconds, scans mixed liquid of the flange type through-wall pipe (1.7.1) of the internal reflux pump, collects the positions of 16 layers of tiny particle reflectors in the mixed liquid, and stores the obtained echoes as images or electric signals in an echo mode to be uploaded to a central control room of the sewage plant; the sewage plant central control room detects and calculates the flow rate and the concentration according to the identified positions of 16 layers of tiny particle reflectors by comparing correlations among a plurality of images or echo modes which are sequenced in time sequence.

Description

Online monitoring device and method for concentration and flow of channel type internal reflux sludge of sewage plant Technical Field The invention relates to the technical field of urban sewage plant construction and operation, in particular to an on-line monitoring device and method for the concentration and flow of channel type internal reflux sludge of a sewage plant. Background The flow detection in the treatment process of the sewage plant is single. In terms of detection position, water line flow detection is generally limited to inflow flow measurement before pretreatment and after a fine grid well and a grit chamber, effluent flow measurement at a tail water discharge channel (well) position, and mud line flow detection is mostly the residual mud discharge amount of a secondary grit chamber. Channel type electromagnetic flowmeter is adopted for detection means. At the most important unit of a sewage plant, namely a biochemical tank part, key parameters affecting carbon removal, biological denitrification and dephosphorization and equipment operation energy consumption are measured, and the biochemical Chi Shanti water inflow (total water inflow is distributed to the water inflow of each biochemical tank monomer), the reflux quantity in mixed liquid (affecting biological denitrification and dephosphorization effects) and the sludge external reflux quantity are rarely measured. When participating in control, the flow obtaining mode is mostly calculated manually, and the flow obtaining mode is deduced through the rotating speed of a water pump motor or the current number of working power, so that the data cannot be accurate. The installation quantity and the position are single, and electromagnetic flow meters are adopted in many types. The accuracy of the electromagnetic flowmeter can not be ensured in the long-term use process due to the complexity and the abominable on-site sewage environment. In view of the above, how to solve the defect that the accurate biochemical pool backflow data cannot be obtained in the prior art is a technical problem that needs to be solved by those skilled in the art. Disclosure of Invention In view of the defects in the prior art, the invention provides the device and the method for online monitoring the concentration and the flow of the channel type internal reflux sludge of the sewage plant, and the aim of realizing the device and the method is to solve the defect that accurate biochemical pond reflux data cannot be obtained in the prior art, not only can flow data be obtained quickly and accurately, but also the detection of waterline and mud line flow which can be quickly disassembled and maintained and are suitable for various sewage treatment processes can be realized. The invention discloses an online monitoring device for the concentration and flow of channel type internal reflux sludge of a sewage plant, which comprises a biochemical tank, wherein a plurality of anaerobic tanks, a plurality of anoxic tanks and a plurality of aerobic tanks which are sequentially connected are arranged in the biochemical tank. Wherein, a mixed liquid internal reflux channel is arranged between the first anoxic tank in the anoxic tanks and the last aerobic tank in the aerobic tanks; The mixed liquid internal reflux channel is used for inputting the mixed liquid in the corresponding aerobic tank back to the corresponding anoxic tank; an internal reflux pump is arranged in the last aerobic tank, and the mixed liquid is input into the mixed liquid internal reflux channel through the internal reflux pump; a wedge-shaped ultrasonic sensor is arranged in the mixed liquid internal reflux channel; and the wedge-shaped ultrasonic sensor scans the mixed liquid in the mixed liquid internal reflux channel, converts the scanning result into an electric signal and uploads the electric signal to a central control room of the sewage plant. Preferably, a ballast cushion block is arranged in the mixed liquid internal reflux channel; The lower face of the wedge-shaped ultrasonic sensor is fixedly connected with the ballast cushion block, and the wedge-shaped ultrasonic sensor is submerged in the bottom of the mixed liquid internal reflux channel through the ballast cushion block. In practical application, the ballast cushion block is made of stainless steel, and the weight is 10kg, so that the wedge-shaped ultrasonic sensor can be prevented from being flushed away to generate displacement when the flow rate of the channel is 5m/s at the highest. More preferably, the ballast cushion block is connected with the stainless steel hook on the bank of the mixed liquid internal reflux channel through a stainless steel chain. More preferably, the stainless steel chain is provided with a chain tensioner. Preferably, the wedge-shaped ultrasonic sensor is connected with a field instrument control cabinet arranged on the bank of the mixed liquid internal reflux channel through a power supply and a control cable