CN-120157283-B - Energy-saving self-circulation candle type reactor and working method thereof

CN120157283BCN 120157283 BCN120157283 BCN 120157283BCN-120157283-B

Abstract

The invention relates to an energy-saving self-circulation candle type reactor and a working method thereof, wherein the reactor comprises a cylindrical shell, a three-phase mixing unit, a three-phase separation unit, a gas-liquid separation circulation unit and a solid-liquid separation circulation unit; the whole appearance of the shell is in an inverted cylindrical candle style, and the shell is provided with an inner layer structure and an outer layer structure and is used for installing a three-phase mixing unit, a three-phase separation unit, a gas-liquid separation circulation unit, a solid-liquid separation circulation unit and an intelligent control unit, and physical support and bearing space are provided for the organic combination of the units and the units. The invention has the characteristics of simple structure, accurate material separation, small occupied area, convenient control and the like, has the unique energy-saving self-circulation function, and can greatly improve the utilization rate of micro-nano electrolytic materials and reduce the energy consumption.

Inventors

QI YUANFENG
CUI HONGFEI
XI FEI
HAN FENG
YAN XINYU
HE KAI

Assignees

青岛理工大学

Dates

Publication Date: 20260512
Application Date: 20250317

Claims (11)

1. The energy-saving self-circulation candle type reactor is characterized by comprising a cylindrical shell (3), a three-phase mixing unit, a three-phase separation unit, a gas-liquid separation circulation unit and a solid-liquid separation circulation unit; The shell (3) comprises an outer layer (1) and an inner layer (2) which are of concentric structures, the three-phase mixing unit comprises a double-screw mixer (5), a solid-liquid mixer (6) and an air blower (8), which are positioned at the bottom of the outer layer (1), and the solid-liquid mixer (6) and the air blower (8) are respectively connected with the double-screw mixer (5) through connecting pipelines (7); The three-phase separation unit comprises a multi-layer separation plate (12), a gas collecting pipe (13), a gas bin (14) and a water collecting tank (15), wherein the multi-layer separation plate (12) is arranged at the upper part of the outer layer (1), the multi-layer separation plate (12) is connected with the gas bin (14) through the gas collecting pipe (13), and the water collecting tank (15) is arranged above the multi-layer separation plate (12); The gas-liquid separation circulation unit comprises a gas-liquid separator (17) positioned at the top of the shell (3), wherein the gas-liquid separator (17) is connected with a gas bin (14) through a gas lifting pipe (16), a horn-shaped carrier (19) is arranged at the lower part of the inner layer (2), an opening of the horn-shaped carrier (19) is communicated with the outer layer (1), the bottom of the gas-liquid separator (17) is connected with a liquid downcomer (18), and the liquid downcomer (18) extends to the lower part of the inner layer (2) and is opened at the free end; The solid-liquid separation circulation unit comprises a central guide cylinder (22) arranged at the upper part of the inner layer (2), the top end of the central guide cylinder (22) is connected with a water collecting tank (15), a throat diffuser (23) which diffuses towards the outer layer (1) is arranged at the bottom of the central guide cylinder (22), a water outlet (21) is arranged at the upper part of the central guide cylinder (22), and a mud bucket (24) provided with a mud discharge opening (25) is connected at the bottom of the inner layer (2); Micro-nano electrolytic material slurry of a horn-shaped carrier (19) arranged close to the side edge in a mud bucket (24) is brought into an outer layer (1) for secondary utilization through a Venturi effect under the action of separating wastewater from a gas-liquid separator (17) in a liquid downcomer (18).
2. The energy-saving self-circulation candle type reactor according to claim 1, wherein the solid-liquid mixer (6) is of a cylindrical structure and is provided with a sewage (10) feed inlet and a micro-nano electrolytic material (11) feed inlet.
3. The energy-saving self-circulation candle reactor according to claim 1, wherein the double-screw mixer (5) is of a cylindrical structure provided with a double-screw rotating rod, the bottom of the double-screw mixer (5) is connected with the air blower (8) through a connecting pipeline (7), and the lower part of the double-screw mixer (5) is connected with the solid-liquid mixer (6) through the connecting pipeline (7).
4. The energy-saving self-circulation candle reactor according to claim 1, wherein the multi-layer separation plate (12) is of a triangular iron arrangement structure with at least two layers, the bottom surface of each layer of triangular iron is open, the top angle is connected with a gas bin (14) through a gas collecting pipe (13), and the triangular irons of different layers are staggered.
5. The energy-saving self-circulation candle reactor according to claim 1, wherein the upper part in the gas-liquid separator (17) is further provided with a mist catcher (20), and the top of the gas-liquid separator (17) is provided with an exhaust port.
6. The energy-saving self-circulating candle reactor according to claim 1, wherein the diameter ratio of the outer layer (1) to the inner layer (2) is 3:1-5:1, and the height-diameter ratio of the outer layer is 8:1-10:1.
7. The energy-saving self-circulating candle reactor according to any of claims 1-6, further comprising a control unit (4) connected to the housing (3), wherein the control unit (4) comprises a detection instrument cluster, a control instrument cluster, and a PLC control module, and the detection instrument cluster, the control instrument cluster, and the PLC control module are connected by control circuits, respectively.
8. A method of operating an energy efficient self-circulating candle reactor according to any of claims 1 to 6, comprising the steps of: Preliminary mixing the micro-nano electrolytic material (11) and untreated sewage (10) rich in heavy metals, refractory organic pollutants and other harmful substances in a solid-liquid mixer (6) to obtain liquid-solid mixed liquid, then completing gas-liquid-solid mixing in a double-screw mixer (5) with gas connected with an external air fan (8), and reaching a three-phase separation unit to perform primary gas-liquid-solid three-phase separation; In the three-phase separation process, gas separated by the multi-layer separation plate (12) is collected to a gas bin (14) through a gas collecting pipe (13), further reaches a gas-liquid separator (17) through a gas lifting pipe (16) connected with the gas bin, and further realizes deep separation of the gas and wastewater carried by the gas in the gas-liquid separator (17), and the gas after the two-time separation is discharged to the outside through an exhaust port arranged at the top end of the gas-liquid separator (17); The wastewater separated by the multi-layer separation plate (12) and the micro-nano electrolytic material (11) carried by the wastewater enter a central guide cylinder (22) through a water collecting tank (15), the separation of the wastewater after treatment and the used micro-nano electrolytic material (11) is realized by the actions of free precipitation, layered precipitation and compression precipitation in an inner layer (2), and the separated micro-nano electrolytic material (11) slurry is further precipitated into a mud bucket (24); The micro-nano electrolytic material slurry of the horn-shaped carrier (19) arranged close to the side edge in the mud bucket (24) is brought into the outer layer (1) for secondary utilization through the Venturi effect under the action of separating wastewater from the gas-liquid separator (17) in the liquid downcomer (18), and the micro-nano electrolytic material (11) which is not taken away by the horn-shaped carrier (19) in the mud bucket (24) is discharged out of the reactor through the mud discharge port (25).
9. The working method of the energy-saving self-circulation candle reactor according to claim 8, wherein the micro-nano electrolytic material (11) and the sewage (10) are mixed according to a mass ratio of 1:3000-1:1000.
10. The working method of the energy-saving self-circulation candle reactor according to claim 8, wherein the liquid-solid mixture and the gas connected with an external air blower (8) are mixed according to the volume ratio of 1:1-1:0.2, and after the gas-liquid-solid mixture is completed in the double-screw mixer (5), the mixture reaches a three-phase separation unit at the upflow speed of 3-10m/h for primary gas-liquid-solid three-phase separation.
11. The working method of the energy-saving self-circulation candle reactor according to claim 8, wherein the particle size diameter of the micro-nano electrolytic material (11) is 300 nm-300 μm.

Description

Energy-saving self-circulation candle type reactor and working method thereof Technical Field The invention relates to an energy-saving self-circulation candle type reactor and a working method thereof, belonging to the technical field of novel environment-friendly equipment. Background The micro-electrolysis technology is a technical method for forming a primary battery system by adopting metal materials (such as Fe and Al) with good conductivity and reducibility and effectively removing heavy metals, refractory organic pollutants and other harmful substances in water through an electroerosion reaction mechanism. The traditional micro-electrolysis technology generally adopts large-scale particle micro-electrolysis materials, and generally relies on a fixed bed reactor to carry out micro-electrolysis degradation on pollutants. However, when the particulate material in the reactor is hardened and passivated, the cleaning work of the fixed bed reactor becomes extremely complicated and difficult, severely affecting the long-term stable operation of the reactor. The micro-nano material has the characteristics of small particle diameter, large specific surface area, difficult occurrence of blockage, hardening and the like, and in recent years, the micro-nano material is developed towards the small scale direction of micro-nano, and a series of micro-nano micro-grade micro-electrolytic materials, such as micro-nano Zero-valent iron materials (Zero-Valent Iron, ZVI), micro-nano Zero-valent aluminum materials (Zero-Valent Aluminum, ZVA), micro-nano iron-carbon materials and the derivative same group materials are further developed based on the micro-nano Zero-valent iron materials. Although micro-nano micro-electrolysis materials generally have the advantages of high reaction rate, high activity and the like on heavy metals, refractory organic pollutants and other harmful substances in water, the micro-nano micro-electrolysis materials are difficult to disperse in sewage and extremely easy to generate agglomeration, so that the problems of low utilization rate of the micro-nano electrolysis materials, easiness in material waste and the like are caused. The occurrence of such a phenomenon can be weakened by increasing the fluidization rate or the stirring strength depending on the fluidized bed reactor, but the energy loss due to stirring causes a linear rise in the operation cost. In addition, it is difficult for the conventional fluidized bed reactor to precisely separate aged or failed micro-nano materials, resulting in low reactor space utilization and poor operation effect. And the control unit of the traditional fluidized bed reactor is complex, multiple parameters such as fluid flow rate, gas quantity, pressure and the like need to be accurately regulated, and any small change can influence the stability of the reactor, so that the operation and maintenance difficulties are increased. These drawbacks have led to the difficulty of conventional fluidized bed reactors in exploiting the advantages of the micro-nano electrolytic materials, and the increasing demand for new reaction devices. Disclosure of Invention Aiming at the defects of the prior art, in particular to the problem that the traditional fluidized bed reactor is difficult to exert the advantage of the micro-nano electrolytic material, the invention provides an energy-saving self-circulation candle reactor and a working method thereof. The reactor of the invention can ensure that common micro-nano electrolytic materials exert maximum performance, and greatly reduce unit energy consumption while ensuring efficient reaction and directional separation of aged and failed micro-nano electrolytic materials. The technical scheme of the invention is as follows: An energy-saving self-circulation candle reactor comprises a cylindrical shell, a three-phase mixing unit, a three-phase separation unit, a gas-liquid separation circulation unit and a solid-liquid separation circulation unit; The shell comprises an outer layer and an inner layer which are of concentric structures, the three-phase mixing unit comprises a double-screw mixer, a solid-liquid mixer and an air blower which are positioned at the bottom of the outer layer, and the solid-liquid mixer and the air blower are respectively connected with the double-screw mixer through connecting pipelines; The three-phase separation unit comprises a multi-layer separation plate, a gas collecting pipe, a gas bin and a water collecting tank, wherein the multi-layer separation plate is positioned at the upper part of the outer layer, the multi-layer separation plate is connected with the gas bin through the gas collecting pipe, and the water collecting tank is positioned above the multi-layer separation plate; The gas-liquid separation circulation unit comprises a gas-liquid separator positioned at the top of the shell, wherein the gas-liquid separator is connected with the gas bin through a gas lifting pipe, a horn