Vortex concave air flotation petroleum wastewater treatment equipment-Global supplier

Small and Medium sized Enterprise Entrepreneurship Base in Longdu Street, Zhucheng City, Shandong Province

CXAF series vortex concave air floating sedimentation machine

1、 Overview

As is well known, industry is an important component of the national economy, and its development is basically synchronized with the development of the national economy; The wastewater discharged by chemical, papermaking, leather, machinery manufacturing, printing and dyeing, metallurgy and other enterprises during their development has caused significant pollution to the environment, and sewage treatment is also an urgent matter.

However, due to a lack of necessary environmental awareness for a long time, coupled with insufficient investment, China's paper industry, while developing rapidly, has caused increasingly serious pollution hazards to the environment, especially to the water environment.

When people awaken from the path of "pollution first, treatment later" and want to control the pollution that has already been caused, the first mature technology that is easily cited is off-site treatment or discharge outlet treatment, which applies the accumulated technology in the treatment of domestic sewage. The sewage sent to the factory discharge outlet is subjected to primary sedimentation purification, secondary biological aeration degradation of organic matter, and tertiary physical and chemical treatment to maximize the degradation of difficult to degrade organic matter and color.

How to treat sewage? What equipment can be used in the process of sewage treatment to meet national discharge standards or reuse standards, and to operate economically? Our company has introduced advanced foreign technology to develop and produce the ZCAF series vortex concave air floating water treatment equipment, which is mainly used for purifying industrial wastewater and urban wastewater in papermaking, chemical industry, printing and dyeing, oil refining and other industries.

2、 Traditional air flotation method

Traditionally, two types of oil collectors (gravity settling tank and separation tank) and dissolved air flotation (DAF) systems have been used to remove solid pollutants, but they have serious performance and operational issues.

The sludge concentration in gravity settling tanks and separation tanks is low, the amount of sludge is large, and frequent sludge treatment is required, resulting in high treatment costs. If not treated, the sludge in the tank will sink more and more, which will not only affect the treatment effect, but in fact, the sewage will eventually become worse after leaving the sedimentation tank.

3、 Structure of CXAF cavitation air flotation equipment

The CXAF vortex concave air flotation equipment mainly includes an air flotation box, vortex concave aerator, chain scraper system, floating slag collection and discharge system, overflow water system, electric control system, dispensing tank, storage tank, glass rotor flowmeter, reflux pipeline, circular operation platform, and dosing pump.

The equipment casing can be a solid steel plate structure, or our company can provide the casing drawings. After the user builds their own concrete structure, our technical personnel will guide the installation on site. It is recommended that when the water processing capacity of a single machine exceeds 320m³/At h, the box is made of reinforced concrete structure.

4CXAFSpecification and model of vortex concave air flotation equipment

model	Processing capacity (M ³/h)	Total power (kw)	Length (m)	Width (m)	Height (m)
CXAF-10	10	3.35	3	1.25	1.65
CXAF-15	15	3.35	4	1.25	1.65
CXAF-20	20	3.7	4.5	1.25	1.65
CXAF-30	30	3.7	5	1.25	1.65
CXAF-50	50	3.78	6	1.5	1.65
CXAF-75	75	5.2	6.5	2.2	1.9
CXAF-100	100	8.1	8	2.2	1.9
CXAF-150	150	8.9	11	2.2	1.9
CXAF-200	200	12.1	15	2.2	1.9
CXAF-320	320	18	15	3	1.9
CXAF-400	400	22.2	16.5	3.5	1.9
CXAF-500	500	26.6	20.5	4.5	1.9

5CXAFWorking principle of vortex concave air flotation equipment

The pollutants in sewage are divided into dissolved organic matter and insoluble substances (i.e. SS). Dissolved organic matter can be converted into non soluble substances under certain conditions. One of the methods of sewage treatment is to add coagulants and flocculants to convert most of the dissolved organic matter into non soluble substances, and then remove all or most of the non soluble substances (i.e. SS) to achieve the purpose of purifying sewage. The main method of removing SS is to use air flotation.

CXAF is the process of air flotation generated by air. The vortex concave aerator directly injects "microbubbles" into the sewage without the need for pre aeration, and then evenly distributes the "microbubbles" in the sewage through precision cast stainless steel diffuser impellers, so there will be no blockage. This equipment does not require auxiliary equipment such as pressure vessels, air compressors, and circulation pumps.

Untreated sewage first enters the aeration and inflation section, where it is fully mixed with "microbubbles". As the "microbubbles" rise, they carry suspended solids to the water surface. The scraper moves along the liquid surface, scraping suspended solids onto a tilted metal plate, and then pushing them into the sludge discharge pipeline. There is a horizontal screw propeller in the sludge discharge pipeline, which sends the collected sludge into the sludge collector. The propeller and scraper are driven by the same motor. The purified sewage will pass through the overflow tank under the inclined plate before discharge. The overflow tank is used to control the water level of the air flotation tank, ensuring that the liquid in the tank does not flow into the sludge discharge pipeline.

The open reflux pipeline extends from the aeration section along the bottom of the air flotation tank. At the same time as generating microbubbles, the vortex concave aerator will form a negative pressure zone at the bottom of the tank with a return pipe. This negative pressure will cause water to flow back from the bottom of the tank to the aeration zone, and then return to the air flotation section. A one-way valve is installed on the return pipe to prevent sewage entering the aeration tank directly from the return pipe without treatment. The entire process ensures that air flotation continues without any inflow.

6、 Advantages of CXAF cavitation air flotation equipment

1. Save investment

CXAF does not require auxiliary equipment such as pressure dissolved gas tanks, air compressors, and circulation pumps for treating urban and industrial wastewater. This equipment can remove oil, gel like substances, suspended solids, COD, and BOD from wastewater. Using it to treat wastewater from chemical pulp production can greatly reduce the scale of biochemical secondary treatment (if waste paper is used as raw material, the wastewater generated through processes such as de ink and bleaching can be discharged or reused without biochemical secondary treatment). It can even eliminate the need for biochemical treatment and directly discharge the wastewater to meet the standard, thereby greatly reducing the overall investment cost.

2. Low operating costs

The equipment adopts multiple aeration heads, and the number of aerators is determined according to the different water treatment volumes. Each aerator has a power of only 2.2KW; the scraper and sludge screw propeller are driven by the same motor, with a power of 2.2KW. The power consumption of the entire ZCAF vortex concave air flotation equipment is extremely small, only 1/8-1/10 of that of traditional dissolved air flotation, and maintenance and manual operation are minimal. During normal operation, there is no need for workers to guard it.

3. High efficiency

Unlike traditional oil collectors such as gravity settling tanks and separation tanks, CXAF automatically and continuously removes solid sludge from wastewater. The removal and storage of sludge are carried out in a concentrated manner, and the concentration of the floating sludge collected by this equipment can reach about 5%, thus reducing the operating costs of sludge treatment.

4. Superior performance

The processing capacity of CXAF cavitation air flotation equipment is 5-2000 cubic meters per hour. Design devices with different flow rates according to customer requirements. The amount of water entering ZCAF does not need to be balanced, and even if the flow rate changes, the equipment can work normally. Under normal circumstances, the removal rate of oil and solid floating matter (SS) exceeds 95%. Obviously, while removing oil and suspended solids, the load of COD and BOD is also greatly reduced, and the removal rate of COD can usually reach 75-85% or more.

5. Easy to operate

The CXAF cavitation air flotation equipment has a simple structure, high degree of automation, and easy operation and maintenance.

6. Odor reduction

The CXAF vortex concave air flotation equipment is an aerobic process for wastewater treatment, and the sludge is removed in a "fresh" state, thus effectively solving the problem of odor generated by the oil collector (gravity settling tank and separation tank). On the other hand, it increases the possibility of solid reuse and reduces processing difficulties.

7. Easy to install

There are very few civil engineering projects supporting CXAF vortex concave air flotation equipment, which can be installed on the ground, underground, or at heights, and the time required is extremely short.

8. Small footprint

The installation area of vortex concave air flotation equipment with a processing capacity of 5-500 cubic meters per hour is only 2.5-90 square meters.

1. Our company adheres to the service philosophy of "excellent quality, customer satisfaction", providing you with excellent products and comprehensive services.

2. Our company values contracts and maintains good reputation. Quality first, three guarantees are implemented for the products sold within one year. If it is indeed a quality problem, free returns and exchanges will be provided.

3. For those who purchase our company's products, the company can send technical personnel to guide installation and commissioning, and can undertake process based design and equipment installation.

4. Ensure year-round discounts and timely supply of various accessories.