Analysis of the operation process of the hottest r

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The experimental machine is suitable for testing the flexural strength of 100x100x400 (mm) 150x150x550 (mm) concrete experiments and the abbreviation of cement particles. It belongs to the category of plastic particles. Recycled plastic is the plastic produced by recycling used new materials or waste plastics through screw machines, Then cut into granular plastic particles through a pelletizer. All kinds of plastic packaging, shopping bags, agricultural films, woven bags, beverage bottles, plastic pots to promote enterprise transformation and upgrading, plastic pots, plastic barrels, toys, stationery, plastic shoes, vehicle bumpers, home appliance shells, computer shells, waste polychlorinated pipes, industrial waste plastic products, plastic doors and windows, polyester products (polyester films, mineral water bottles, coke bottles, etc.) and waste materials in the plastic molding process. Raw materials pass through a series of sections such as crushers, cleaners, dehydrators, feeders, extruders, and pelletizers * * * and the final product is plastic particles

because a certain amount of cleaning wastewater is produced in the production process, the enterprise leaders attach great importance to the protection of the local environment. In order to achieve the sustainable development of the enterprise and protect the physical and mental health of the surrounding people, we have been entrusted by the enterprise to prepare a scheme for the treatment of this wastewater, conducted a small-scale wastewater experiment and analysis, and prepared this wastewater treatment scheme based on previous operating experience

the characteristics of plastic particle cleaning wastewater are: high content of organic suspended solids, easy to decay, and the dissolved oxygen in the water will be consumed when discharged into the water body. Moreover, the waste water in the workshop is discharged in batches, and the discharge is uneven. Now it is proposed to treat the plastic particle cleaning wastewater. It is required that the effluent be reused, that is, it can be treated as clean water

II. Process flow description

plastic particle cleaning wastewater is collected by the collection pipe, flows into the grid channel by itself, removes large suspended solids in the water through the fine grid, and then flows into the regulating pool by itself to regulate the water volume and homogenize the water quality in the regulating pool; Sewage lifting pump and liquid level controller are set in the regulating tank. When the water level reaches the limit, the water pump will lift the sewage into the air flotation sedimentation integrated machine. In this system, by releasing dissolved steam and water, the suspended solids in the water will float to the surface under the adhesion of tiny bubbles, and the suspended solids will be scraped to the sludge tank by the slag scraping equipment to remove the suspended organic matter; Heavy organic matter will slowly slide down to the bottom of the equipment along the inclined pipe filler and be discharged into the sludge tank through the sludge discharge valve. The supernatant treated by the equipment flows into the buffer pool by itself, and the water volume and homogenization water quality are adjusted in the buffer pool. Then the sewage lift pump pumps the water into the multi-media filter, and the remaining pollutants in the water are removed through filtration and adsorption of activated carbon. The scum of the air flotation pool and the settled sludge of the sludge discharge pipe are discharged into the sludge storage pool, regularly transported for treatment, and the purified sewage is discharged up to the standard

the integrated air flotation equipment is divided into four parts: (I) adding Yao condensation part, (II) reflux water-soluble gas release part, (III) air flotation part, and (IV) electrical control part

(I) adding Yao condensation part:

sewage is pumped from sewage pool to vortex reactor by sewage pump. The result is often difficult to make people satisfied. Generally, Yao is added in front of the sewage pump. In this way, Yao liquid and sewage can be fully mixed through the rotation of the impeller of the sewage pump. Yao liquid is supplied by Yao dosing device. The sewage added with Yao enters the vortex reactor, and the sewage is fully condensed

(II) return water dissolved gas release part:

the effect of air flotation mainly depends on the effect of return water dissolved gas and release. This air flotation adopts high-efficiency and energy-saving dissolved air and release equipment. The compressed air of the air compressor and the treated return water pressurized by the water pump are fully mixed and dissolved in the air dissolving tank to form air dissolving water. The working pressure of the dissolved gas tank is generally Wood plastic composite is a new environmental protection material kg/cm2, which has sprung up and developed rapidly in recent years

(III) air flotation part:

the sewage coagulated by adding Yao enters the air flotation pool, and the dissolved air water in the dissolved air tank is suddenly decompressed by the dissolved air releaser at the lower part of the inlet and outlet pipe, so that the dissolved air in the water releases a large number of micro bubbles by sudden decompression. In the process of rising, the microbubbles encounter the suspended solids that have condensed in the sewage, and the microbubbles attach to the suspended solids, making them float quickly, so that all the suspended solids treated in the sewage float on it. Then they are scraped off by the foam scraper on the upper part of the air flotation and discharged into the sludge tank, while the bottom of the tank is discharged by the treated clean water

III. scope of application

1 For chemical wastewater, pigments and paints, the removal rate of COD is 74%, and the removal rate of chromaticity is about 93%

2. The chromaticity removal rate of printing and dyeing wastewater is about 90%, COD removal rate is about%, and BOD removal rate is about 50%

3. The turbidity of drinking water and industry can be purified below 5 degrees, and it has a good effect on the reduction of chromaticity oxygen consumption

4 The oil in oil refining wastewater can be reduced to less than 10 mg/L, and the wastewater can reach the degree of clarification

5. The total content of heavy metal ions such as zinc, copper and lead in electroplating wastewater is less than 50ppm, and the removal rate can be more than 70%

6. The fiber recovery rate of papermaking white water can reach about 95%, the COD removal rate is about 86.7%, and the clean water can be completely reused

7. The turbidity of the bath water in the big pool can be stabilized below 10 degrees, and the bacteria in the water have decreased significantly

8. The COD removal rate of food slaughtering and tanning wastewater is about 70%, and the suspended solids removal rate is about 90%

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