Ozone microbubble air floating concentration device and sludge conditioning and concentration method

Abstract

The invention discloses an ozone micro-bubble air flotation concentration device and a sludge conditioning and concentration method. The device includes a reaction tank, an ozone generator, a slag remover, and a slag collection tank, and 4 to 6 sets of series-connected vortex three-phase mixers are arranged side by side above the reaction tank. The sludge is sent into the multi-stage vortex three-phase mixer through the pressurized water pump to form a vortex; the ozone is sent into the first-stage vortex three-phase mixer through the gas booster pump or air compressor; the PAM agent is pumped through the agent dosing into the second-stage or third-stage vortex three-phase mixer; in the multi-stage vortex three-phase mixer, the agent is mixed with pollutant particles, water, and gas in three-phase contact, and the vortex generates microbubbles to form flocs; in the flocs Entrained air bubbles float to the surface of the liquid to form scum. The present invention realizes the sludge conditioning through the multi-stage vortex three-phase mixer and the enhanced oxidation of ozone, and at the same time can obtain air-floated scum with a moisture content of 90-95%, which is beneficial to the subsequent ultra-high pressure elastic press or plate-and-frame dehydrator dehydration.

Description

technical field

[0001] The invention belongs to the technical field of sludge treatment, and relates to an ozone micro-bubble air flotation concentration device and a sludge conditioning and concentration method, which are suitable for sludge conditioning and concentration, and the scum after conditioning and concentration enters an ultra-high pressure elastic press Press dehydration. Background technique

[0002] Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. The main characteristics of sludge are high water content (up to 99%), high organic content, easy to rot and smell, and fine particles, small specific gravity, colloidal liquid, it is between liquid and solid Thickness. In recent years, with the rapid development of my country's economy and sewage treatment technology, the amount of sludge produced has also increased rapidly, and the resulting...

Examples

Embodiment 1

[0033] Such as figure 1 , image 3 Shown, a kind of ozone microbubble air flotation concentration device of the present invention, it comprises a reaction tank 5, above the reaction tank, six groups (six stages) of vortex three-phase mixer 11 (from water outlet side to water inlet side) are arranged side by side in series Arranged in sequence as the first stage, the second stage...the sixth stage), each stage of the vortex three-phase mixer is equipped with a first-stage reactor; the reaction tank is divided into three chambers from the water inlet side to the water outlet side by the weir plate, namely : contact chamber A, separation chamber B and clean water collection chamber C; a slag remover 8 is arranged above the separation chamber B, and the other end of the slag remover 8 extends horizontally above the slag collection tank 6; the top of the slag collection tank 6 is lower than the vortex three-phase The bottom of the mixer 11; more than half of the lower part of the ...

Embodiment 2-5

[0050] A kind of method that utilizes the ozone microbubble air flotation concentration device described in embodiment 1 of the present invention to carry out sludge conditioning and concentration is as follows: (embodiments 2-5 are all processed according to this method)

[0051] Sludge (domestic sewage sludge, industrial wastewater sludge, water supply sludge) is transported into a multi-stage vortex three-phase mixer through a water inlet pipe to form a vortex using a pressurized water inlet pump, that is, from the first stage vortex three-phase mixer Enter the following several stages of vortex three-phase mixer one by one; after the ozone is prepared by the ozone generator, it is compressed by a gas booster pump or an air compressor to increase the pressure of the ozone gas, and then it is transported into the first stage of the vortex three-phase mixer through the intake pipe. In the phase mixer; after the PAM medicine is prepared by the medicine preparation device, use t...

Embodiment 2

[0054] Embodiment 2: the processing object is the remaining sludge (water content 99%) discharged from the secondary sedimentation tank of a sewage treatment plant based on a certain domestic sewage water source, and the ozone microbubble air flotation concentration device of embodiment 1 is adopted to carry out conditioning, Concentration treatment: PAM dosage is 0.003gPAM / gDS (dry sludge), ozone dosage is 0.00625gO 3 / gDS (dried sludge); the pressure of the water inlet pump is about 0.8Mpa; the pressure of ozone gas (that is, the pressure at the outlet of the gas booster pump or air compressor) is slightly greater than the pressure of the water inlet pump (slightly greater than 0.8MPa); PAM agent dosing The feeding pressure of the pump is slightly higher than the inlet pump pressure (slightly higher than 0.8MPa). The pressure of the first-stage vortex three-phase mixer is the highest (about 0.8Mpa), and the pressure in the subsequent vortex three-phase mixer decreases gradua...

technical field

[0001] The invention belongs to the technical field of sludge treatment, and relates to an ozone micro-bubble air flotation concentration device and a sludge conditioning and concentration method, which are suitable for sludge conditioning and concentration, and the scum after conditioning and concentration enters an ultra-high pressure elastic press Press dehydration. Background technique

[0002] Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. The main characteristics of sludge are high water content (up to 99%), high organic content, easy to rot and smell, and fine particles, small specific gravity, colloidal liquid, it is between liquid and solid Thickness. In recent years, with the rapid development of my country's economy and sewage treatment technology, the amount of sludge produced has also increased rapidly, and the resulting...

Examples

Embodiment 1

[0033] Such as figure 1 , image 3 Shown, a kind of ozone microbubble air flotation concentration device of the present invention, it comprises a reaction tank 5, above the reaction tank, six groups (six stages) of vortex three-phase mixer 11 (from water outlet side to water inlet side) are arranged side by side in series Arranged in sequence as the first stage, the second stage...the sixth stage), each stage of the vortex three-phase mixer is equipped with a first-stage reactor; the reaction tank is divided into three chambers from the water inlet side to the water outlet side by the weir plate, namely : contact chamber A, separation chamber B and clean water collection chamber C; a slag remover 8 is arranged above the separation chamber B, and the other end of the slag remover 8 extends horizontally above the slag collection tank 6; the top of the slag collection tank 6 is lower than the vortex three-phase The bottom of the mixer 11; more than half of the lower part of the ...

Embodiment 2-5

[0050] A kind of method that utilizes the ozone microbubble air flotation concentration device described in embodiment 1 of the present invention to carry out sludge conditioning and concentration is as follows: (embodiments 2-5 are all processed according to this method)

[0051] Sludge (domestic sewage sludge, industrial wastewater sludge, water supply sludge) is transported into a multi-stage vortex three-phase mixer through a water inlet pipe to form a vortex using a pressurized water inlet pump, that is, from the first stage vortex three-phase mixer Enter the following several stages of vortex three-phase mixer one by one; after the ozone is prepared by the ozone generator, it is compressed by a gas booster pump or an air compressor to increase the pressure of the ozone gas, and then it is transported into the first stage of the vortex three-phase mixer through the intake pipe. In the phase mixer; after the PAM medicine is prepared by the medicine preparation device, use t...

Embodiment 2

[0054] Embodiment 2: the processing object is the remaining sludge (water content 99%) discharged from the secondary sedimentation tank of a sewage treatment plant based on a certain domestic sewage water source, and the ozone microbubble air flotation concentration device of embodiment 1 is adopted to carry out conditioning, Concentration treatment: PAM dosage is 0.003gPAM / gDS (dry sludge), ozone dosage is 0.00625gO 3 / gDS (dried sludge); the pressure of the water inlet pump is about 0.8Mpa; the pressure of ozone gas (that is, the pressure at the outlet of the gas booster pump or air compressor) is slightly greater than the pressure of the water inlet pump (slightly greater than 0.8MPa); PAM agent dosing The feeding pressure of the pump is slightly higher than the inlet pump pressure (slightly higher than 0.8MPa). The pressure of the first-stage vortex three-phase mixer is the highest (about 0.8Mpa), and the pressure in the subsequent vortex three-phase mixer decreases gradua...

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