Barrel type internal circulation electrochemical water treatment device and its operation method

Abstract

This invention provides a barrel-type internal circulation electrochemical water treatment device and its operation method. The device includes a barrel body, a central outlet pipe fixed to the bottom of the barrel, and the central outlet pipe and the barrel wall are divided into several sector-shaped sections. Each sector-shaped section is further divided into an inner section and an outer section. A BDD electrolysis module is installed on the barrel wall of each sector-shaped section. The sector-shaped sections include an inlet chamber, an outlet chamber, and a transition chamber. Except for the first vertical partition between the inlet and outlet chambers, the top edges of the remaining first vertical partitions have overflow notches. The top and bottom of the second vertical partitions between the inner and outer sections are not sealed to form a wastewater circulation channel. A wastewater overflow outlet is provided at the top of the central outlet pipe corresponding to the outlet chamber. A vent is provided on the barrel lid. The bottom of the central outlet pipe drains water externally. All sector-shaped sections have slag discharge ports on their bottoms. This invention's device achieves continuous internal circulation of wastewater within the barrel around the central outlet pipe, resulting in a more compact structure and smaller footprint.

Description

Technical Field

[0001] This invention relates to the field of electrochemical wastewater treatment technology, and in particular to a barrel-type internal circulation electrochemical water treatment device and its operation method. Background Technology

[0002] BDD (boron-doped diamond) electrolytic wastewater treatment, as an electrochemical oxidation method, is a highly promising technology for treating high-concentration / recalcitrant organic wastewater. It is particularly suitable for areas where conventional biochemical methods are difficult to treat. The applicable range includes: pretreatment of recalcitrant organic wastewater, high-salt organic wastewater (+recovered salt), highly toxic organic wastewater, high-concentration wastewater, high-ammonia nitrogen wastewater, and strong acid and strong alkali organic wastewater (+recovered acid and alkali).

[0003] Currently, in BDD applications, BDD materials are typically encapsulated in standard modules, and multiple standard electrolysis modules are connected in series to form a BDD treatment device. A wastewater storage tank is also included. During wastewater treatment, a pump transports wastewater from the storage tank to the BDD treatment device for electrolysis, then back to the storage tank, repeating this cycle until the wastewater in the storage tank meets the standards. This method has the following drawbacks: 1. The system is complex, requiring a pump to form a wastewater circulation system to achieve the desired treatment effect. It occupies a large area, is cumbersome to install, and has high energy consumption. 2. Because BDD generates gas during operation, the presence of this gas reduces the actual contact area between the wastewater and the BDD plates, resulting in a lower degradation efficiency than a single standard electrolysis module. The more standard electrolysis modules connected in series, the lower the degradation efficiency becomes due to gas accumulation in the modules closer to the end, ultimately leading to a decrease in overall degradation efficiency. 3. Each reaction batch is a sequencing batch reaction; after each batch reaction is completed, the qualified wastewater must be drained before water is introduced. When treating large volumes of low-concentration COD wastewater, the short reaction time for each batch and the large number of batches per day result in long idle times and low utilization of the BDD electrocatalytic module.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] This invention provides a barrel-type internal circulation electrochemical water treatment device and its operation method, aiming to solve the technical problems mentioned in the background section of the prior art electrochemical wastewater treatment device.

[0006] The contents of this invention are as follows:

[0007] The first aspect of the present invention provides a barrel-type internal circulation electrochemical water treatment device, including a barrel body, a central outlet pipe disposed in the barrel body and fixed on the bottom of the barrel, a first vertical partition for dividing the space between the central outlet pipe and the barrel wall of the barrel body into a plurality of sector-shaped compartments, a second vertical partition for dividing the space of each sector-shaped compartment into an inner compartment and an outer compartment, and a BDD electrolysis module disposed on the barrel wall of each sector-shaped compartment and used for electrolyzing the wastewater flowing through the outer compartment.

[0008] The plurality of sector-shaped compartments include an inlet compartment, an outlet compartment, and a transition compartment; in the plurality of sector-shaped compartments, the inlet compartment and the outlet compartment are adjacent, and the remaining sector-shaped compartments are all transition compartments;

[0009] The top of the barrel wall corresponding to the water inlet is provided with a wastewater inlet; overflow notches are provided on the top edge of the first vertical partition between the water inlet and the transition chamber, the top edge of the first vertical partition between adjacent transition chambers, and the top edge of the first vertical partition between the transition chamber and the water outlet; the top and bottom edges of the second vertical partition are not closed to form a wastewater circulation channel between the inner chamber section and the outer chamber section;

[0010] The top of the central water outlet pipe corresponding to the water outlet chamber is provided with a wastewater overflow outlet; the barrel lid of the barrel body is provided with a vent outlet; the bottom of the barrel directly opposite the bottom of the central water outlet pipe is provided with an external drainage outlet; and the bottom of the barrel corresponding to each of the fan-shaped chamber sections is provided with a slag discharge outlet.

[0011] In an optional embodiment of the first aspect of the present invention, the bottom of the barrel is a concave bottom, and the slag discharge port is disposed on the bottom of the barrel below the inner compartment section.

[0012] In one optional embodiment of the first aspect of the present invention, an inlet pipe is provided on the wastewater inlet, and one end of the inlet pipe located inside the barrel bends toward the inner compartment section.

[0013] 4. The barrel-type internal circulation electrochemical water treatment equipment according to claim 3, characterized in that each of the slag discharge ports is provided with a slag discharge flange pipe with the pipe opening facing downward; all the slag discharge flange pipes are connected to the same annular collection pipe, and a main slag discharge pipe is connected to the outer periphery of the annular collection pipe.

[0014] In an optional embodiment of the first aspect of the invention, the overflow notch is located near the central outlet pipe at the top edge of the first vertical partition.

[0015] In an optional embodiment of the first aspect of the present invention, a polygon is formed between the second vertical partition of the inlet chamber, the outlet chamber and the transition chamber.

[0016] In one optional embodiment of the first aspect of the present invention, the top edges of a plurality of first vertical partitions are flush with the inside of the barrel; the top and bottom edges of a plurality of second vertical partitions are also flush with the inside of the barrel.

[0017] In an optional embodiment of the first aspect of the present invention, an inlet pump and a wastewater tank are connected to the inlet pipe via a pipe, and an exhaust fan is connected to the exhaust port via a pipe.

[0018] In an optional embodiment of the first aspect of the present invention, the anode and cathode plates of the BDD electrolysis module are both vertically arranged within the outer compartment section.

[0019] A second aspect of the present invention provides a method for operating a barrel-type internal circulation electrochemical water treatment device, comprising:

[0020] Wastewater is continuously injected into the inlet chamber of the tank, causing the wastewater to gradually overflow into the transition chamber and the outlet chamber.

[0021] Monitor the water levels in the inlet tank, the transition tank, and the outlet tank; start electrolysis when the water levels in the inlet tank, the transition tank, and the outlet tank submerge each of the BDD electrolysis modules.

[0022] The wastewater circulates between the inner and outer sections of the inlet chamber, the transition chamber, and the outlet chamber. As the wastewater continues to flow into the inlet chamber, it is sequentially electrolyzed through the inlet chamber, the transition chamber, and the outlet chamber until it meets the standards.

[0023] After meeting the standards, the wastewater flows into the central outlet pipe from the drain outlet at the top of the central outlet pipe, and is then discharged outward through the central outlet pipe.

[0024] Beneficial Effects: This invention provides a barrel-type internal circulation electrochemical water treatment device and its operating method. The device includes a barrel body, a central outlet pipe fixed to the bottom of the barrel, and the central outlet pipe and the barrel wall are divided into several sector-shaped sections. Each sector-shaped section is further divided into an inner section and an outer section. A BDD electrolysis module is installed on the barrel wall of each sector-shaped section. The sector-shaped sections include an inlet chamber, an outlet chamber, and a transition chamber. Overflow notches are provided on the top edges of the first vertical partitions, except for the one between the inlet and outlet chambers. The top and bottom of the second vertical partitions between the inner and outer sections are not sealed to form a wastewater circulation channel. A wastewater overflow outlet is provided at the top of the central outlet pipe corresponding to the outlet chamber. A vent is provided on the barrel lid. The bottom of the central outlet pipe drains water externally. Sludge discharge ports are provided on the bottom of all sector-shaped sections. This invention's device achieves continuous internal circulation of wastewater within the barrel around the central outlet pipe, resulting in a more compact structure and smaller footprint. Attached Figure Description

[0025] Figure 1 This is a top-view cross-sectional structural diagram of a barrel-type internal circulation electrochemical water treatment device according to the present invention. Figure 2 This is a cross-sectional view of a barrel-type internal circulation electrochemical water treatment device, cut through the inlet tank of the present invention.

[0026] Figure 3 This is a cross-sectional view of a barrel-type internal circulation electrochemical water treatment device, cut through the outlet chamber of the present invention, from a head-up perspective.

[0027] Figure 4 This is a schematic diagram of the structure of a barrel-type internal circulation electrochemical water treatment system according to the present invention.

[0028] The attached figures are labeled as follows:

[0029] 10-Barrel body; 20-Central outlet pipe; 30-Fan-shaped compartment section; 40-First vertical partition; 50-Inner compartment section; 60-Outer compartment section; 70-Second vertical partition; 240-BDD electrolysis module; 80-Inlet compartment; 90-Outlet compartment; 100-Transition compartment; 110-Wastewater inlet; 120-Overflow notch; 130-Wastewater overflow outlet; 140-Exhaust outlet; 150-External drainage outlet; 250-Drainage pipe; 160-Slag outlet; 170-Inlet pipe; 180-Slag discharge flange pipe; 190-Ring manifold pipe; 200-Main slag discharge pipe; 210-Inlet pump; 220-Wastewater tank; 230-Exhaust fan. Detailed Implementation

[0030] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0031] See Figure 1 and Figure 2 The first aspect of the present invention provides a barrel-type internal circulation electrochemical water treatment device, including a barrel body 10 (including a barrel body, a barrel bottom, and a barrel lid), and a central water outlet pipe 20 disposed inside the barrel body 10 and fixed on the barrel bottom of the barrel body 10 (see...). Figure 2 (The upper end does not contact the bucket lid), a first vertical partition 40 used to divide the space between the central water outlet pipe 20 and the bucket wall of the bucket body 10 into several fan-shaped compartments 30 (see Figure 2The bottom edge of the first vertical partition 40 is completely closed to the bottom of the barrel, and the height of its top edge is slightly lower than the height of the top edge of the barrel body (exemplarily, the top edges of several of the first vertical partitions 40 are flush with each other inside the barrel body 10). A second vertical partition 70 is used to divide the space of each of the fan-shaped compartments 30 into an inner compartment 50 and an outer compartment 60 (the height of the top edge of the second vertical partition 50 is lower than the height of the top edge of the first vertical partition 40, and the height of its bottom edge is higher than the height of the upper end of the first vertical partition 40 to allow water circulation passage, exemplarily). The top and bottom edges of several second vertical partitions 50 are flush with each other inside the barrel 10, and a BDD electrolysis module 240 (including a flange base plate and anode and cathode plates (including a BDD anode plate and a titanium or stainless steel cathode plate) are disposed on the barrel wall of each of the fan-shaped compartments 30 and used to electrolyze the wastewater flowing through the outer compartment 60. The surfaces of the anode and cathode plates are vertically disposed inside the outer compartment 60 so that the bubbles generated by the electrolysis of the anode and cathode plates can move upward quickly) are arranged on the barrel wall of each of the fan-shaped compartments 30.

[0032] See Figure 1 In a first aspect of the invention, a plurality of the sector-shaped sections 30 include an inlet chamber 80, an outlet chamber 90, and a transition chamber 100; in the plurality of sector-shaped sections 30, the inlet chamber 80 and the outlet chamber 90 are adjacent, and the remaining sector-shaped sections 30 are all transition chambers 30. From a top view, the second vertical partitions 50 of the inlet chamber 80, the outlet chamber 90, and the transition chamber 100 form a polygon (e.g., a hexagon and an octagon); in the invention, the overall flow direction of wastewater in the tank is that it flows from the inlet chamber 80 through each of the transition chambers 100 in sequence, and finally reaches the outlet chamber 90.

[0033] See Figure 1 and Figure 2 The top of the barrel wall corresponding to the water inlet 80 is provided with a wastewater inlet 110 (see...). Figure 2(located on the barrel wall above the BDD electrolysis module 240); overflow gaps 120 are provided on the top edge of the first vertical partition 40 between the water inlet chamber 80 and the transition chamber 100, the top edge of the first vertical partition 40 between adjacent transition chambers 100, and the top edge of the first vertical partition 40 between the transition chamber 100 and the water outlet chamber 90 (the overflow gap 120 is located near the center water outlet pipe 20 on the top edge of the first vertical partition 40, and its radial width is preferably equal to or less than the width of the inner chamber section 50. This has the advantage of preventing the overflow wastewater between the chamber sections from affecting the upward flow of the outer chamber section 60, while accelerating the downward flow of the inner chamber section 50 by means of the impact of the overflow water, so as to better realize the wastewater circulation between the inner chamber section 50 and the outer chamber section 60), the water between the water inlet chamber 80 and the water outlet chamber 90 The first vertical partition 40 isolates the flow, preventing mutual circulation. The top and bottom edges of the second vertical partition 40 are not closed to form a wastewater circulation channel between the inner section 50 and the outer section 60. Due to the generation of bubbles and heat from the electrolysis of the BDD electrolysis module 240, the outer section 60 of the wastewater circulation channel is an upward flow. Under the guiding effect of the first vertical partition 40 and the second vertical partition 50, a downward flow is formed in the inner section 50. Furthermore, an inlet pipe 170 is provided on the wastewater inlet 110. One end of the inlet pipe 170 located inside the barrel 10 bends towards the inner section 50. The advantage of this arrangement is that the water flowing into the inlet pipe 170 can promote the downward flow of the inner section 50, which can better realize the wastewater circulation between the inner section 50 and the outer section 60.

[0034] See Figure 1 and Figure 3 The top end of the central outlet pipe 20 corresponding to the outlet chamber 90 is provided with a wastewater overflow outlet 130; see also Figure 1 and Figure 2 The barrel body 10 has a vent 140 on its lid; an external drain 150 (with a drain pipe 250 on it) is located on the bottom of the barrel directly opposite the bottom of the central water outlet pipe 20; and a slag discharge port 160 is located on the bottom of the barrel corresponding to each of the fan-shaped compartments 30. More specifically, the bottom of the barrel is concave, and the slag discharge port 160 is located on the bottom of the barrel below the inner compartment 50. In this embodiment, the impurities generated by the electrolysis of the BDD electrolysis module 240 fall to the bottom of the barrel and roll towards the central water outlet pipe 20 (i.e., below the inner compartment 50). This has the advantage that the impurities are not easily carried back to the BDD electrolysis module 240 by the circulating water flow of the inner compartment 50 and the outer compartment 60, thus affecting the electrolysis efficiency of the BDD electrolysis module 240.

[0035] See Figure 2 In an optional embodiment of the first aspect of the present invention, each of the slag discharge ports 160 is provided with a downward-facing slag discharge flange pipe 180; all the slag discharge flange pipes 180 are connected to the same annular manifold pipe 190, and a main slag discharge pipe 200 is connected to the outer periphery of the annular manifold pipe 190. In this embodiment, all the waste slag generated by the sector-shaped silo section 30 is discharged through the unified main slag discharge pipe 200, reducing the number of pipes, reducing the space occupied by the pipes, and also facilitating subsequent maintenance.

[0036] In an optional embodiment of the first aspect of the present invention, the BDD anode plate of the BDD electrolysis module 240 is a boron-doped diamond and metal matrix composite material, consisting of a metal matrix and diamond reinforcement dispersed in the metal matrix. The diamond reinforcement includes, but is not limited to, diamond composite film material. The diamond reinforcement consists of diamond particles and a diamond surface modification layer. The diamond surface modification layer consists of a diamond thin film layer and a diamond transition layer. The diamond transition layer is formed during the growth of the diamond film layer and its main component is carbon-metal bonds formed between diamond and the metal substrate, which can enhance the bonding force between the diamond film layer and the metal substrate.

[0037] Specifically, the electrode plate containing the diamond reinforcement provides the following benefits to the electrode module: It uses diamond particles as the core, with a polycrystalline diamond transition layer first deposited on its surface, followed by a doped diamond outer shell layer. The high-purity polycrystalline diamond transition layer is grown in situ on the single-crystal diamond particles, maintaining the original properties of single-crystal diamond, such as high thermal conductivity, high hardness, and high wear resistance. The doped diamond outer shell layer is grown in situ on the polycrystalline diamond transition layer. This structure, including the transition layer, improves the wettability and bonding force between diamond and metal. Electrode modules with this structure have a long service life and can maintain stable operation even under strong water flow impact, without experiencing BDD film peeling. Furthermore, the diamond surface modification layer formed on the outer surface of the single-crystal diamond particles in this invention can also isolate and protect the diamond particles, preventing graphitization, oxidation, and other chemical reactions at high temperatures. Simultaneously, it enhances the adhesion of the diamond, acting as a bonding bridge between the two, and improves the wettability between the diamond and the matrix metal. It also increases the strength of the diamond particles, with the coating providing reinforcement and toughening, and mitigating surface defects, microcracks, and micropores. These defects can be compensated for by the modification layer, resulting in increased strength. Additionally, the addition of a small amount of rare earth elements (one or a combination of lanthanum, cerium, neodymium, europium, gadolinium, dysprosium, holmium, ytterbium, lutetium, yttrium, and scandium) to the metal matrix can refine the matrix grains, purify the interface between the diamond and the matrix, promote the formation of carbides in the matrix and their reaction with the diamond, and improve the adhesion between the metal matrix and the diamond, thereby improving the interfacial bonding state between the matrix and the diamond. The finished structure of the diamond / metal matrix composite material used is not restricted; it can be a regular structure or a multi-size or irregularly shaped structure to meet the module requirements.

[0038] See Figure 4 In an optional embodiment of the first aspect of the present invention, an inlet pump 210 and a wastewater tank 220 are connected to the inlet pipe 170 via a pipe, and an exhaust fan 230 is connected to the exhaust port 140 via a pipe. In this invention, the wastewater to be treated is first stored in the wastewater tank 220 and then pumped into the tank body 10 by the inlet pump 210 for electrochemical treatment. The exhaust fan 230 is used to assist in discharging the exhaust gas generated by the BDD electrolysis module 240 in the tank body 10 to the outside when necessary.

[0039] A second aspect of the present invention provides a method for operating a barrel-type internal circulation electrochemical water treatment device, comprising:

[0040] Wastewater is continuously injected into the inlet chamber of the tank, causing the wastewater to gradually overflow into the transition chamber and the outlet chamber.

[0041] Monitor the water levels in the inlet tank, the transition tank, and the outlet tank; start electrolysis when the water levels in the inlet tank, the transition tank, and the outlet tank submerge each of the BDD electrolysis modules.

[0042] The wastewater circulates between the inner and outer sections of the inlet chamber, the transition chamber, and the outlet chamber. As the wastewater continues to flow into the inlet chamber, it is sequentially electrolyzed through the inlet chamber, the transition chamber, and the outlet chamber until it meets the standards.

[0043] After meeting the standards, the wastewater flows into the central outlet pipe from the drain outlet at the top of the central outlet pipe, and is then discharged outward through the central outlet pipe.

[0044] In an optional embodiment of the second aspect of the invention, see [link to documentation]. Figure 4 The barrel-type internal circulation electrochemical water treatment equipment is equipped with an autonomous learning control system, which includes a central calculation module, an exponential current output module, a COD online detector 260, and a flow rate monitoring device 270. The central calculation module analyzes the collected COD concentration, current, and flow rate data and sends control commands. It has a built-in calculation model of the relationship between COD degradation and changes in current and flow rate. After each wastewater treatment, it calculates the energy consumption for that batch and compares it with the lowest energy consumption in the database for treating the same initial COD concentration to achieve the standard. It continuously adjusts the current and flow rate parameters autonomously based on the calculation model to find the parameters corresponding to the lowest energy consumption for operation. The exponential current output module converts the current parameter correction commands from the central calculation module into corresponding current outputs to the BDD. The COD online detector monitors the COD change of wastewater from influent to effluent in real time. It first sends the initial COD concentration to the central calculation module, which then sends the optimal operating parameters for that COD from the database to the exponential current output module for operation. The flow rate monitoring device is used to monitor the speed at which organic wastewater passes through the BDD material and sends the flow rate signal to the central computing module. This module can then calculate the impact of different flow rates on the BDD degradation efficiency and determine the optimal economic flow rate.

[0045] In summary, this invention provides a barrel-type internal circulation electrochemical water treatment device and its operating method. The device includes a barrel body, a central outlet pipe fixed to the bottom of the barrel, and the central outlet pipe and the barrel wall are divided into several sector-shaped sections. Each sector-shaped section is further divided into an inner section and an outer section. A BDD electrolysis module is installed on the barrel wall of each sector-shaped section. The several sector-shaped sections include an inlet chamber, an outlet chamber, and a transition chamber. Overflow notches are provided on the top edges of the first vertical partitions, except for the one between the inlet and outlet chambers. The top and bottom of the second vertical partitions between the inner and outer sections are not sealed to form a wastewater circulation channel. A wastewater overflow outlet is provided at the top of the central outlet pipe corresponding to the outlet chamber. A vent is provided on the barrel lid. The bottom of the central outlet pipe drains water externally. Sludge discharge ports are provided on the bottom of all sector-shaped sections. This invention's device allows wastewater to continuously circulate within the barrel around the central outlet pipe, resulting in a more compact structure and smaller footprint.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A barrel-type internal circulation electrochemical water treatment device, characterized in that, The device includes a barrel body, a central water outlet pipe disposed inside the barrel body and fixed to the bottom of the barrel, a first vertical partition for dividing the space between the central water outlet pipe and the barrel wall of the barrel body into several sector-shaped compartments, a second vertical partition for dividing the space of each sector-shaped compartment into an inner compartment and an outer compartment, and a BDD electrolysis module disposed on the barrel wall of each sector-shaped compartment for electrolyzing the wastewater flowing through the outer compartment. The plurality of sector-shaped compartments include an inlet compartment, an outlet compartment, and a transition compartment; in the plurality of sector-shaped compartments, the inlet compartment and the outlet compartment are adjacent, and the remaining sector-shaped compartments are all transition compartments; A wastewater inlet is provided at the top of the barrel wall corresponding to the inlet chamber; overflow notches are provided on the top edge of the first vertical partition between the inlet chamber and the transition chamber, the top edge of the first vertical partition between adjacent transition chambers, and the top edge of the first vertical partition between the transition chamber and the outlet chamber; the overflow notches are located near the central outlet pipe on the top edge of the first vertical partition, and their radial width is equal to or less than the width of the inner chamber section; the top and bottom edges of the second vertical partition are not closed to form a wastewater circulation channel between the inner chamber section and the outer chamber section; the BDD electrolysis module generates bubbles and heat, causing an upward flow in the outer chamber section and a downward flow in the inner chamber section; The top of the central water outlet pipe corresponding to the water outlet chamber is provided with a wastewater overflow outlet; the barrel lid of the barrel body is provided with a vent outlet; the bottom of the barrel directly opposite the bottom of the central water outlet pipe is provided with an external drainage outlet; and the bottom of the barrel corresponding to each of the fan-shaped chamber sections is provided with a slag discharge outlet. A polygon is formed between the second vertical partition of the inlet chamber, the outlet chamber, and the transition chamber; The top edges of several first vertical partitions are flush with the inside of the barrel; the top and bottom edges of several second vertical partitions are also flush with the inside of the barrel.

2. The barrel internal loop electro-chemical water treatment apparatus according to claim 1, wherein The bottom of the barrel is concave, and the slag discharge port is located on the bottom of the barrel below the inner compartment section.

3. The barrel internal loop electro-chemical water treatment apparatus of claim 2, wherein, The wastewater inlet is equipped with an inlet pipe, and one end of the inlet pipe inside the barrel bends towards the inner compartment.

4. The barrel internal loop electro-chemical water treatment apparatus of claim 3, wherein, Each of the aforementioned slag discharge ports is provided with a slag discharge flange pipe facing downwards; all the aforementioned slag discharge flange pipes are connected to the same annular collection pipe, and the outer periphery of the annular collection pipe is connected to a main slag discharge pipe.

5. The barrel internal loop electro-chemical water treatment apparatus of claim 4, wherein, The overflow notch is located at the top edge of the first vertical partition near the central water outlet pipe.

6. The barrel internal electric electrochemical water treatment apparatus according to claim 3, wherein The water inlet pipe is connected to a water pump and a wastewater tank via a pipe, and the exhaust port is connected to an exhaust fan via a pipe.

7. The barrel-type internal circulation electrochemical water treatment equipment according to claim 1, characterized in that, The anode and cathode plates of the BDD electrolysis module are both vertically arranged within the outer compartment section.

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