A reactor for a chlorine dioxide generator

Abstract

The utility model discloses a reactor of chlorine dioxide generator relates to chlorine dioxide preparation technical field, including multistage reaction unit of intercommunication, and the liquid communication pipe and the gas communication pipe are communicated between adjacent reaction unit, and the first stage reaction unit is connected with the feed dynamic mixer, and the last stage reaction unit is connected with the disinfectant outlet pipe and the disinfectant gas outlet pipe. The reactor can realize gas, liquid branch circuit operation in use, make the chlorine dioxide in the reaction liquid in time from the reaction liquid to the gas phase space of reactor, then from disinfectant gas outlet pipe, prevent the chlorine dioxide from the disproportionation reaction and generate chlorate in liquid phase, to improve its reaction effect, raw material conversion rate, chlorine dioxide purity improves obviously, prevented the occurrence of disproportionation reaction.

Description

Technical Field

[0001] This utility model relates to the field of chlorine dioxide preparation technology, and specifically to a reactor for a chlorine dioxide generator. Background Technology

[0002] Chlorine dioxide disinfectant is an internationally recognized highly effective disinfectant and sterilizer. It can kill all microorganisms, including vegetative bacteria, bacterial spores, fungi, mycobacteria, and viruses, and these bacteria do not develop drug resistance. Due to its excellent performance in water treatment, chlorine dioxide has also been widely used in agricultural drinking water treatment.

[0003] Currently, chlorine dioxide generators used for agricultural drinking water treatment generally employ single-stage reactors due to the low required chlorine dioxide content. The connections of various components, pipes, feed pipes, and disinfectant outlet pipes in the reactor are often made by welding or bonding, which easily leads to leaks. When used in the generator, the short reaction time of the raw materials, poor mixing effect, and lack of aeration result in a high concentration of chlorine dioxide in the reaction solution, leading to poor reaction effect, low raw material conversion rate, low chlorine dioxide purity, and the occurrence of disproportionation reactions that generate chlorate ions.

[0004] Therefore, agricultural drinking water chlorine dioxide generators that currently use single-stage reactors are prone to exceeding the standards for chlorate and chlorite. Utility Model Content

[0005] The technical problem this invention aims to solve is that current single-stage reactors used in agricultural drinking water chlorine dioxide generators are prone to exceeding the standards for chlorate and chlorite. Based on this, this invention proposes a reactor for a chlorine dioxide generator. This reactor can achieve gas-liquid separation during use, allowing chlorine dioxide in the reaction liquid to exit from the reaction liquid into the gas phase space of the reactor, and then exit from the disinfection gas outlet pipe. This prevents chlorine dioxide from undergoing a disproportionation reaction in the liquid phase to generate chlorate ions, thereby improving the reaction efficiency. The raw material conversion rate and chlorine dioxide purity are significantly improved, and the occurrence of disproportionation reactions is prevented.

[0006] This utility model is achieved through the following technical solution:

[0007] This application provides a reactor for a chlorine dioxide generator, comprising multi-stage reaction units interconnected with each other, with adjacent reaction units connected by liquid and gas connecting pipes; a feed dynamic mixer is connected to the first-stage reaction unit, and a disinfectant outlet pipe and a disinfectant gas outlet pipe are connected to the last-stage reaction unit.

[0008] The reaction unit can be configured as a two-stage unit.

[0009] Furthermore, each stage of the reaction unit includes two interconnected vertical reaction pipes, and the bottom of each of the two vertical reaction pipes is connected to an aeration pipe.

[0010] Among them, the vertical reaction pipe, aeration pipe, liquid connecting pipe, gas connecting pipe, disinfectant outlet pipe, and disinfectant gas outlet pipe are all made of CPVC or PVC pipe.

[0011] Furthermore, the vertical reaction pipes are connected by a detachable connection structure.

[0012] Furthermore, the detachable connection structure includes a threaded connection structure.

[0013] In addition to threaded connections, detachable connection structures can also include bolted connections, snap-fit ​​connections, and other detachable connection methods. A sealant is applied to the connection points to ensure a tight seal.

[0014] Furthermore, the height of the vertical reaction pipe is 400mm to 1000mm. Preferably, it is 500mm to 800mm. Most preferably, it is 600mm.

[0015] Furthermore, the diameter of the vertical reaction tube is 32mm to 110mm. Preferably, it is 50mm to 90mm. Most preferably, it is 63mm.

[0016] Furthermore, the diameter of the aeration pipe is 20mm to 32mm. Preferably, it is 20mm to 25mm. Most preferably, it is 20mm.

[0017] Furthermore, the aeration pipe is provided with aeration holes, the diameter of which is 2mm to 8mm. Preferably, it is 4mm to 6mm. Most preferably, it is 5mm.

[0018] Furthermore, the feed dynamic mixer includes a feed pipe connected to the first reaction unit, and the feed pipe is provided with two feed ports.

[0019] The two feed inlets are arranged in a spiral, allowing the two raw materials to be fed tangentially from the inner wall of the dynamic mixer, thus achieving spiral mixing and improving the mixing reaction effect.

[0020] Furthermore, the feed pipe is connected to multiple baffles.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0022] (1) The reactor of this application can achieve gas-liquid separation operation during use, so that chlorine dioxide in the reactor can be released from the reaction liquid into the gas phase space of the reactor in a timely manner, and then discharged from the disinfection gas outlet, preventing chlorine dioxide from undergoing disproportionation reaction in the liquid phase to generate chlorate, thereby improving its reaction effect, significantly improving the raw material conversion rate and chlorine dioxide purity, preventing the occurrence of disproportionation reaction, ensuring that the reaction time of the raw materials meets the requirements, and improving the reaction efficiency of the generator.

[0023] (2) The reactor of the present invention adopts a threaded connection, which does not require welding or bonding during the manufacturing process. This avoids the drawbacks of aging or deformation caused by welding or bonding, prevents leakage after a period of use, and improves the sealing, strength and service life of the reactor. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the reactor structure of a chlorine dioxide generator according to the present invention;

[0026] Figure 2 for Figure 1 Cross-sectional view along the AA direction;

[0027] Figure 3 This is a schematic diagram of the dynamic feed mixer in this utility model;

[0028] Figure 4 for Figure 3 Cross-sectional view along the BB direction.

[0029] The attached diagram shows the markings and corresponding component names:

[0030] 1-Feed dynamic mixer, 2-First stage reactor, 3-First stage reactor aeration pipe, 4-Liquid connecting pipe, 5-Gas connecting pipe, 6-Second stage reactor, 7-Second stage reactor aeration pipe, 8-Disinfectant outlet pipe, 9-Disinfectant gas outlet pipe, 10-First stage reactor aeration hole, 11-Second stage reactor aeration hole, 12-First feed inlet, 13-Second feed inlet, 14-Baffle plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a joint, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example

[0036] like Figures 1-4 As shown, this embodiment provides a reactor for a chlorine dioxide generator. The reactor consists of a primary reactor 2 and a secondary reactor 6 that are interconnected. The primary reactor 2 and the secondary reactor 6 are connected by a liquid connecting pipe 4 and a gas connecting pipe 5. A feed dynamic mixer 1 is connected to the primary reactor 2, and a disinfectant outlet pipe 8 and a disinfectant gas outlet pipe 9 are connected to the secondary reactor 6. The disinfectant outlet pipe 8 is located below the disinfectant gas outlet pipe 9.

[0037] Specifically, both the primary reactor 2 and the secondary reactor 6 include two interconnected vertical reaction pipes. Aeration pipes are connected to the bottom of both vertical reaction pipes. The bottom of the primary reactor 2 is connected to the primary reactor aeration pipe 3, and the bottom of the secondary reactor 6 is connected to the secondary reactor aeration pipe 7. The vertical reaction pipes are connected to the liquid connecting pipe 4, the gas connecting pipe 5, the disinfectant outlet pipe 8, and the disinfectant gas outlet pipe 9 by threaded connections. All vertical reaction pipes, aeration pipes, liquid connecting pipe 4, gas connecting pipe 5, disinfectant outlet pipe 8, and disinfectant gas outlet pipe 9 are made of CPVC or PVC pipes.

[0038] Specifically, PVC pipes, rods, elbows, tees, and reducers with diameters ranging from Φ32mm to Φ110mm are first machined with corresponding tapered threads, then connected by threads, and sealant is applied to the outer end of the threaded connection. A dynamic mixer of corresponding size is connected to the front end of the primary reactor 2 to ensure the mixing effect of the two raw materials. The reactor height is 400mm-1000mm, and the diameter of the reaction pipe is Φ32mm-110mm. Aeration pipes are inserted at the bottom of the primary reactor 2 and the secondary reactor 6, and the aeration pipe diameter is Φ20mm-Φ32mm, with a Φ2mm-Φ8mm drilled at the top of the aeration pipe, depending on the size of the reactor.

[0039] Preferably, Φ50mm-90mm PVC pipes, rods, elbows, tees, and reducers are first machined with corresponding tapered threads, then threaded together, and sealant is applied to the outer end of the threaded connection. A dynamic mixer of corresponding size is connected to the front end of the primary reactor 2 to ensure the mixing effect of the two raw materials. The reactor height is 500mm-800mm, and aeration pipes with a diameter of Φ20mm-25mm are inserted into the bottom of the primary and secondary reactors 6, with Φ4mm-Φ6mm aeration holes drilled at the top of the aeration pipes.

[0040] The most preferred method involves first machining corresponding tapered threads onto Φ63mm PVC pipes, rods, elbows, tees, and reducers, then connecting them by thread, and applying sealant to the outer ends of the threaded connections. A dynamic mixer of the corresponding size is connected to the front end of the primary reactor 2 to ensure the mixing effect of the two raw materials. The reactor height is 600mm. Aeration pipes with a diameter of Φ20mm are inserted into the bottom of the primary reactor 2 and the secondary reactor 6, and Φ5mm aeration holes are drilled at the top of the aeration pipes.

[0041] Specifically, to improve the mixing effect of the raw materials, a dynamic mixer is added before the primary reactor 2. This allows the two raw materials to be fed tangentially from the inner wall of the mixer, achieving spiral mixing and improving the mixing reaction effect. The feed dynamic mixer 1 includes a feed pipe connected to the primary reactor 2, with a first feed inlet 12 and a second feed inlet 13. The two feed inlets are arranged spirally, allowing the two raw materials to be fed tangentially from the inner wall of the feed dynamic mixer 1, achieving spiral mixing and improving the mixing reaction effect. To further improve the mixing effect, multiple baffles 14 are connected inside the feed pipe.

[0042] The reactor is manufactured using cylindrical, acid-resistant materials. It can be made from PVC or CPVC pipes, elbows, tees, reducers, and rods, which are first machined into tapered threads before being threaded together. A sealant is then evenly applied to the outer ends of the threaded connections. This method avoids the problems of traditional plastic reactors becoming brittle, losing strength, and easily cracking due to welding and bonding, thus improving the reactor's sealing performance, strength, and service life. Aeration pipes are inserted at the bottom of the primary reactor 2 and the secondary reactor 6. The top of the aeration pipes is sealed with a cap, and aeration holes with a diameter of 2mm to 8mm are drilled on the caps at the top of the aeration pipes, depending on the size of the reactor.

[0043] The entire reactor manufacturing process utilizes tapered thread connections to avoid the drawbacks of welding and bonding methods. Based on the reactor structure of the agricultural drinking water chlorine dioxide generator, PVC / CPVC pipes, rods, elbows, tees, reducers, and caps of appropriate sizes are selected. First, primary reactor 2 and secondary reactor 6 are manufactured. During manufacturing, tapered threads are machined onto the PVC / CPVC pipes, rods, elbows, tees, reducers, and caps, which are then connected. The outer ends of each threaded connection are further sealed with the appropriate sealant. Primary reactor 2 and secondary reactor 6 are then connected together using a connecting pipe. Finally, the feed dynamic mixer 1 is bonded to primary reactor 2, and the disinfectant outlet pipe 8 and disinfectant gas outlet pipe 9 are connected to secondary reactor 6.

[0044] During operation, the reactor employs a gas-liquid separation operation mode. The two raw material solutions required for the chlorine dioxide generator (sodium chlorite or sodium chlorite and sodium bisulfate or hydrochloric acid) are metered by a metering pump and enter the dynamic mixer tangentially from the front end. After being thoroughly mixed by the baffles 14 at each stage of the dynamic mixer, the solution enters the primary reactor 2 from the rear end of the dynamic mixer for further reaction. The reaction liquid enters the upper part of the right side pipe of the primary reactor 2 from the bottom of the left side pipe, then enters the upper part of the left side pipe of the secondary reactor 6 through a connecting pipe, and finally enters the secondary reactor 6 from the bottom of the left side pipe. The disinfectant outlet pipe 8 in the middle of the right side tube of the generator 6 is extracted; at the same time that the reaction raw materials enter the primary reactor 2 from the feed dynamic mixer 1, air enters from the aeration pipe at the bottom of the reactor. The air blows off the chlorine dioxide generated in the reaction liquid and enters the gas phase pipeline of the secondary reactor 6 from the upper gas phase pipeline and the gas connection pipe of the primary reactor 2. The disinfectant gas outlet pipe 9 is then added from the upper gas phase pipeline of the secondary reactor 6 and extracted, ensuring that the concentration of chlorine dioxide in the reaction liquid is lower than the concentration of the disproportionation reaction, preventing the occurrence of the disproportionation reaction and ensuring that the reaction time of the raw materials meets the requirements, thereby improving the reaction efficiency of the generator.

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A reactor for a chlorine dioxide generator, characterized in that, It includes interconnected multi-stage reaction units, with adjacent reaction units connected by liquid and gas connecting pipes; the first-stage reaction unit is connected to a feed dynamic mixer, and the last-stage reaction unit is connected to a disinfectant outlet pipe and a disinfectant gas outlet pipe.

2. The reactor of a chlorine dioxide generator according to claim 1, characterized in that, Each stage of the reaction unit includes two interconnected vertical reaction pipes, and the bottom of each of the two vertical reaction pipes is connected to an aeration pipe.

3. The reactor of a chlorine dioxide generator according to claim 2, characterized in that, The vertical reaction pipes are connected by a detachable connection structure.

4. The reactor of a chlorine dioxide generator according to claim 3, characterized in that, The detachable connection structure includes a threaded connection structure.

5. The reactor of a chlorine dioxide generator according to claim 2, characterized in that, The height of the vertical reaction pipe is 400mm~1000mm.

6. The reactor of a chlorine dioxide generator according to claim 2, characterized in that, The diameter of the vertical reaction tube is 32mm~110mm.

7. The reactor of a chlorine dioxide generator according to claim 2, characterized in that, The diameter of the aeration pipe is 20mm~32mm.

8. The reactor of a chlorine dioxide generator according to claim 2, characterized in that, The aeration pipe is provided with aeration holes, the diameter of which is 2mm to 8mm.

9. The reactor of a chlorine dioxide generator according to claim 1, characterized in that, The feed dynamic mixer includes a feed pipe connected to the first reaction unit, and the feed pipe is provided with two feed ports.

10. The reactor of a chlorine dioxide generator according to claim 9, characterized in that, The feed dynamic mixer is internally connected to multiple baffles.

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