A fully enclosed integrated air float for treating flammable, volatile and toxic substances

Abstract

The utility model relates to a kind of integrated air floaters of fully-enclosed processing flammable, volatile and toxic substance, it solves the technical problem that special gas diffuses when the existing recyclable lipid wastewater is handled, the maintenance difficulty of slag scraping mechanism, it is equipped with box, the box top is equipped with screw connection cover plate and constitutes closed box, the box is equipped with water inlet and water outlet, cyclone, overflow chamber and outlet chamber are equipped in the box, the outlet chamber is connected with the water outlet, the water outlet is connected with gas dissolving tank by water inlet pipe, the gas dissolving tank is connected with the cyclone by gas dissolving water pipe, the gas dissolving tank is equipped with air inlet pipe, water pump is also equipped on the water inlet pipe;Three-way breather valve and oil ester oil discharge unit are equipped on the cover plate, and the three-way breather valve is equipped with air inlet and exhaust port.The utility model can be widely applied to the occasion of oily wastewater treatment containing flammable, volatile and toxic substance.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an integrated air flotation machine for the fully enclosed treatment of flammable, volatile and toxic substances. Background Technology

[0002] In traditional chemical industries, wastewater containing recyclable lipids and other substances is generated during production. To improve the biodegradability of wastewater treatment and reduce treatment costs, these lipids must be recovered and reused.

[0003] In traditional wastewater treatment, the treatment of wastewater containing recyclable grease and other substances mainly relies on underground or semi-underground grease traps for settling to recover surface grease. However, this method is time-consuming and the separation effect is not satisfactory. Furthermore, it poses significant safety hazards when treating flammable, volatile, and toxic substances. Currently, in the wastewater treatment field, dissolved air flotation (DAF) technology is commonly used to treat grease-containing substances in wastewater, favored for its significant separation effect and high efficiency. However, traditional DAF designs often require a micro-aeration process, resulting in open or semi-closed structures. This structure may pose certain safety hazards when treating flammable, volatile, or toxic substances. Similarly, closed-loop DAF devices exist, such as patent number CN110550685A; however, this device does not adequately consider the potential for gas escape due to overpressure during micro-aeration and volatile gas expansion and diffusion in a closed space, posing corresponding safety hazards. Furthermore, it does not address the maintenance issues of the chain-plate scraper in case of malfunction.

[0004] To address the aforementioned problems, this utility model proposes an integrated air flotation machine for the fully enclosed treatment of flammable, volatile, and toxic substances. Summary of the Invention

[0005] To address the technical problems of special gas escape and difficult maintenance of the sludge scraping mechanism in the treatment of recyclable lipid wastewater, this utility model provides an integrated air flotation machine for the fully enclosed treatment of flammable, volatile and toxic substances.

[0006] This utility model provides an integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances. It comprises a housing with a screw-on cover plate at the top forming a closed enclosure. The housing has an inlet and an outlet. Inside the housing are a hydrocyclone, an overflow chamber, and an outlet chamber. The outlet chamber is connected to the outlet, and the outlet is connected to a dissolved air tank via an inlet pipe. The dissolved air tank is connected to the hydrocyclone via a dissolved air water pipe. The dissolved air tank has an air inlet pipe, and a water pump is also installed on the inlet pipe. The cover plate has a three-way breather valve and an oil / ester discharge unit. The three-way breather valve has an air inlet and an exhaust outlet.

[0007] Preferably, a first spacer baffle is fixed inside the box, and the cyclone separator is located in front of the first spacer baffle.

[0008] Preferably, an adjustable baffle is provided between the water outlet chamber and the overflow chamber, and the height of the adjustable baffle is adjustable; the bottom of the water outlet chamber is sealed, and the bottom of the overflow chamber is connected to the housing.

[0009] Preferably, a sight glass is installed on the top of the outer side of the water outlet chamber.

[0010] Preferably, a pressure gauge is also provided on the water inlet pipe between the water pump and the dissolved air tank.

[0011] Preferably, the three-way breather valve is further provided with a pressure reducing valve, which is connected to the front end of the air inlet via a flange.

[0012] Preferably, the cover plate is provided with a four-way connector through a flange, the four-way connector is connected to a spray pipe inside the box, and the spray pipe is provided with nozzles.

[0013] Preferably, the housing is further provided with an oil drain chamber, the oil drain chamber has a sealed structure, an opening at the upper end for receiving grease, and an oil drain outlet at the bottom of the outer side of the oil drain chamber; the oil drain unit is provided with a speed reducer, a transmission system and a scraper connected in sequence, and the scraper moves horizontally in the upper layer of the water towards the oil drain chamber.

[0014] Preferably, the transmission system has a two-stage chain drive, with the first-stage chain drive and the reducer arranged on the outside of the housing, and the second-stage chain drive arranged on the inside of the housing.

[0015] Preferably, the bottom of the outer side of the box is provided with an air vent, which is respectively located on the front and rear sides of the first spacer baffle.

[0016] The beneficial effects of this utility model are:

[0017] 1. Compared with the traditional oil separator treatment method, the air flotation machine used in this utility model has higher treatment efficiency and better treatment effect.

[0018] 2. Compared with other types of air flotation machines, the fully enclosed box unit structure of this utility model is particularly suitable for recycling volatile, toxic, flammable and explosive oils and esters.

[0019] 3. The pressure balance design of the closed safety isolation unit in this utility model ensures the safety of operation and maintenance.

[0020] 4. The separate installation design of the cover plate and the box body of this utility model ensures the convenience of maintenance and repair.

[0021] 5. This utility model utilizes the hydrocyclone release mechanism of dissolved air water to ensure the uniformity of bubble distribution and promote the effective stratification and aggregation of oils and esters.

[0022] 6. The installation method of the external reducer of this utility model ensures operational safety and ease of maintenance.

[0023] 7. This utility model achieves water conservation by connecting the water inlet pipe to the outlet, thereby reducing costs.

[0024] 8. The design of this utility model's steam / water / nitrogen four-way connector enables three-stage spray purging of steam, water, and nitrogen, improving safety and cleanliness. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 yes Figure 1 The left view;

[0027] Figure 3 yes Figure 1 Top view.

[0028] Explanation of symbols in the attached drawings:

[0029] 1. Housing Unit; 101. Housing; 102. Cover Plate; 103. Water Inlet; 104. Drain Port; 105. Overflow Chamber; 106. First Spacing Baffle; 107. Second Spacing Baffle; 108. Third Spacing Baffle; 109. Oil Discharge Chamber; 110. Oil Discharge Port; 111. Water Outlet Chamber; 112. Adjusting Baffle; 113. Sight Glass; 114. Water Outlet; 2. Dissolved Air Water Unit; 201. First Water Inlet Pipe; 202. First Support; 203. Water Pump; 204. Second Water Inlet Pipe; 205. Pressure Gauge; 206. Dissolved Air Tank; 207. Air inlet pipe; 208. Dissolved gas water pipe; 209. Cyclone separator; 3. Safety isolation unit; 301. Three-way breather valve; 302. Pressure reducing valve; 303. Air inlet; 304. Exhaust port; 305. Steam / water / nitrogen four-way connector; 306. Spray pipe; 307. Nozzle; 4. Oil and grease drainage unit; 401. Reducer; 402. Second bracket; 403. First sprocket; 404. Second sprocket; 405. Third sprocket; 406. Fourth sprocket; 407. First chain; 408. Second chain; 409. Scraper. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, so that those skilled in the art to which the present invention pertains can easily implement the present invention.

[0031] Example: Figure 1-3 As shown, this utility model includes a housing unit 1, a dissolved air water unit 2, a safety isolation unit 3, and an oil and grease discharge unit 4.

[0032] The housing unit 1 includes a housing 101, a cover plate 102, a water inlet 103, an air outlet 104, an overflow chamber 105, a first partition baffle 106, a second partition baffle 107, a third partition baffle 108, an oil drain chamber 109, an oil drain outlet 110, a water outlet chamber 111, an adjusting baffle 112, a sight glass 113, and a water outlet 114.

[0033] The entire housing 101 is designed as a cuboid structure, made of carbon steel and treated with anti-corrosion coating. A cover plate 102 is installed on the top of the housing 101, connected by bolts to ensure its airtightness and ease of disassembly. The water inlet 103 is located on the upper outer side of the housing 101. The first partition baffle 106 is integrally welded to the center of the housing 101. Drain ports 104 are respectively located on the front and rear sides of the first partition baffle 106, at the bottom outer side of the housing 101. The outlet chamber 111 and the overflow chamber 105 are separated by an adjusting baffle 112. The outlet chamber 111 adopts a bottom-sealed design, while the bottom of the overflow chamber 105 is connected to the housing 101. The overflow chamber 105 is mainly used to adjust the overflow rate and regulate the liquid level inside the equipment. A sight glass 113 for observing the water volume is installed on the top outer side of the outlet chamber 111. An outlet 114 is located at the bottom outer side of the outlet chamber 111. The second baffle 107 is integrally welded to the rear end of the housing 101. The oil drain chamber 109 is a rectangular sealed structure attached to the housing 101. An oil drain port 110 is provided at the bottom outer side of the oil drain chamber 109. The third baffle 108 is integrally welded to the top of the rear end of the housing 101, forming a rectangular structure together with the oil drain chamber 109. After entering through the inlet 103, the water flows towards the rear end of the housing 101, passes through the first baffle 106 and flows over its top, then through the second baffle 107 and flows over its bottom. The water then flows upward to the overflow chamber 105, reaches the outlet chamber 111 after adjusting the baffle 112, and finally flows out from the outlet 114. The overflow speed is controlled by adjusting the position of the baffle 112, as observed through the sight glass 113.

[0034] The dissolved air water unit 2 includes a first inlet pipe 201, a first support 202, a water pump 203, a second inlet pipe 204, a pressure gauge 205, a dissolved air tank 206, an air inlet pipe 207, a dissolved air water pipe 208, and a hydrocyclone 209. One end of the first inlet pipe 201 is connected to the bottom of the outlet 114, and the other end is connected to the inlet of the water pump 203. The water pump 203 is mounted on the bottom of the first support 202 on the outside of the housing 101, and the first support 202 is welded and fixed to the housing 101. The pressure gauge 205 is mounted on the second inlet pipe 204. One end of the second inlet pipe 204 is connected to the outlet of the water pump 203, and the other end is connected to the bottom of the dissolved air tank 206. The air inlet pipe 207 is installed at the bottom of the dissolved air tank 206 and is equipped with a one-way valve. One end of the dissolved air water pipe 208 is connected to the bottom of the dissolved air tank 206 and to the cover plate 102 via a flange. Its rear end is connected to the hydrocyclone 209. The hydrocyclone 209 is installed at the end of the dissolved air water pipe 208, located at the bottom of the housing 101. Water from the outlet 114 enters the water pump 203 through the first inlet pipe 201, and then flows through the second inlet pipe 204 into the dissolved air tank 206. Compressed air enters the dissolved air tank 206 through the air inlet pipe 207, where it mixes with the water to form dissolved air water. The pressure of the dissolved air water is controlled by adjusting the power of the water pump 203 via frequency conversion, according to the pressure gauge 205, thereby changing the water flow rate. The dissolved air water then drives the hydrocyclone 209 to rotate through the dissolved air water pipe 208, releasing the dissolved air water. As the dissolved air water is released, bubbles rise, carrying oil and esters in the water to the upper layer of the water.

[0035] The cyclone aerator 209, also known as a cyclone aerator, employs a multi-layer spiral cutting design for oxygenation and aeration. When airflow enters the aerator, it first passes through a two-stage spiral cutting system before entering the upper multi-layer spherical aeration heads, where it undergoes multiple collisions, breaking up air bubbles into microbubbles. This significantly improves oxygen utilization, resulting in uniform aeration and high oxygenation efficiency. After entering through the inlet pipe, the gas is discharged tangentially by the cyclone from the gas distributor, colliding with the inner wall of the reaction cylinder. This moderately mixes and agitates the wastewater, simultaneously causing the substrate (mixed liquid) to rise. Most of this rising flow, under the action of the shear bubble diffuser, forms a diffused upward main body at the top of the aerator. A portion of the rising flow forms a downward reflux along the channel between the inner and outer reaction cylinders. Any insufficient reflux is replenished with substrate (mixed liquid) through orifices at the bottom of the outer reaction cylinder, creating a complete internal circulation reaction within the aerator. Simultaneously, the outer reaction cylinder and the surrounding mixed liquid form an external circulation reaction. The cyclone aerator integrates air-water swirling mixing, multiple crushing, and cutting into one unit, resulting in excellent air-water mixing and thus producing uniform bubbles with high oxygen utilization. The aerator's large-aperture channels, combined with the swirling mixing structure, offer advantages such as a large service area, low resistance, stable and reliable operation, resistance to clogging, and long service life.

[0036] Safety isolation unit 3 includes a three-way breather valve 301, a pressure reducing valve 302, an air inlet 303, an exhaust port 304, a steam / water / nitrogen four-way connector 305, a spray pipe 306, and nozzles 307. The three-way breather valve 301 is connected to the cover plate 102 via a flange. The pressure reducing valve 302 is connected to the air inlet 303 of the three-way breather valve 301 via a flange. The steam / water / nitrogen four-way connector 305 is connected to the cover plate 102 via a flange. The front end of the spray pipe 306 is connected to the steam / water / nitrogen four-way connector 305. The spray pipe 306 is made entirely of 316L stainless steel and can be arranged horizontally as a main pipe with multiple branch pipes evenly distributed longitudinally. Nozzles 307 are evenly installed on the branch pipes for cleaning. The ends of the branch pipes are fixed to the inner wall of the housing 101. The three-way breather valve 301 ensures pressure balance inside the equipment. Gas released from dissolved air is collected through the exhaust port 304 of the three-way breather valve 301. When a slight negative pressure occurs inside the chamber 101, nitrogen can be drawn into the equipment. The nitrogen enters the chamber 101 through the inlet 303 to maintain pressure balance. Using the pressure reducing valve 302, the nitrogen is adjusted to normal pressure. The steam / water / nitrogen four-way connector 305 can be used to clean the inside of the chamber 101, connecting steam, water, and nitrogen respectively. When performing maintenance and cleaning of the inside of the chamber 101, first spray the chamber 101 with clean water, then purge the chamber 101 with steam, and finally purge with nitrogen.

[0037] The oil discharge unit 4 includes a reducer 401, a second bracket 402, a first sprocket 403, a second sprocket 404, a third sprocket 405, a fourth sprocket 406, a first chain 407, a second chain 408, and a scraper 409. The reducer 401 is mounted on the second bracket 402, which is fixed to the cover plate 102. The first sprocket 403 is connected to the reducer 401, and the second sprocket 404 is mounted on the outer side of the cover plate 102. The third sprocket 405 and the fourth sprocket 406 are both mounted on the inner side of the cover plate 102. The first chain 407 connects the first sprocket 403 and the second sprocket 404, and the second chain 408 connects the third sprocket 405 and the fourth sprocket 406. The scraper 409 is fixed to the second chain 408. When the reducer 401 starts, it drives the first sprocket 403 to rotate. The first sprocket 403 pulls the second sprocket 404 to rotate via the first chain 407. The rotation of the second sprocket 404 then drives the third sprocket 405 to rotate. The third sprocket 405, through the linkage of the second chain 408 and the fourth sprocket 406, enables the scraper 409 to scrape away oil and grease from the upper layer of the water. Finally, the scraper 409 scrapes the oil and grease to the oil discharge chamber 109 and discharges it through the oil discharge port 110.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the claims of the present invention should be within the protection scope of the present invention.

Claims

1. A fully enclosed integrated air flotation machine for treating flammable, volatile, and toxic substances, comprising a housing, characterized in that... The top of the box is equipped with a screw-on cover plate to form a closed box. The box has a water inlet and a water outlet. Inside the box, there is a hydrocyclone, an overflow chamber, and a water outlet chamber. The water outlet chamber is connected to the water outlet. The water outlet is connected to the dissolved gas tank through a water inlet pipe. The dissolved gas tank is connected to the hydrocyclone through a dissolved gas water pipe. The dissolved gas tank is equipped with an air inlet pipe. A water pump is also installed on the water inlet pipe. The cover plate is equipped with a three-way breather valve and an oil and grease discharge unit. The three-way breather valve has an air inlet and an air outlet.

2. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 1, characterized in that, A first spacer baffle is fixed inside the box, and the cyclone separator is located in front of the first spacer baffle.

3. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 1, characterized in that, An adjustable baffle is provided between the water outlet chamber and the overflow chamber, and the height of the adjustable baffle is adjustable; the bottom of the water outlet chamber is sealed, and the bottom of the overflow chamber is connected to the housing.

4. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 1, characterized in that, A sight glass is installed on the top of the outer side of the water outlet chamber.

5. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 1, characterized in that, A pressure gauge is also installed on the inlet pipe between the water pump and the dissolved air tank.

6. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 1, characterized in that, The three-way breather valve is also equipped with a pressure reducing valve, which is connected to the front end of the air inlet via a flange.

7. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 1, characterized in that, The cover plate is provided with a four-way connector through a flange, which is connected to a spray pipe inside the box, and the spray pipe is provided with nozzles.

8. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 1, characterized in that, The tank is also equipped with an oil drain chamber. The oil drain chamber has a sealed structure and an opening at the top for receiving grease. An oil drain outlet is located at the bottom of the outer side of the oil drain chamber. The oil drain unit is equipped with a speed reducer, a transmission system and a scraper connected in sequence. The scraper moves horizontally in the upper layer of the water towards the oil drain chamber.

9. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 8, characterized in that, The transmission system has two-stage chain drive. The first-stage chain drive and the reducer are arranged on the outside of the housing, and the second-stage chain drive is arranged on the inside of the housing.

10. The integrated air flotation machine for fully enclosed treatment of flammable, volatile, and toxic substances according to claim 2, characterized in that, The bottom of the outer side of the box is provided with an air vent, which is respectively located on the front and rear sides of the first spacer.

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