A cyclone type chlorine dioxide generator

Abstract

The utility model discloses a cyclone type chlorine dioxide generator, including generator body, the bottom of generator body is provided with raw material adding opening, and raw material adding opening out installs liquid inlet structure, the liquid inlet structure includes for inner tube and the outer tube of setting in the outer portion of inner tube, the upper end of inner tube is closed, and the lateral wall on inner tube is equipped with liquid inlet hole, and the lower end of inner tube is used for adding hydrochloric acid, the lower end of outer tube is closed, and the lateral wall on outer tube is vertically installed with liquid adding pipe, and liquid adding pipe is used for adding sodium chlorite, and the upper end of outer tube is linked with raw material adding opening. The utility model can make the reaction raw material in the joining place of reactor and the reaction zone subarea realize raw material's quick double full mixing, improve the reaction rate, make the reaction more fully, can provide sufficient diffusion space for the reaction liquid of heated expansion simultaneously, control the residence time of reaction liquid in generator, reduce the production of byproduct such as sodium chlorate, improve the conversion rate of sodium chlorite, guarantee the high yield of ClO2.

Description

Technical Field

[0001] This utility model relates to the field of chlorine dioxide generator technology, and more specifically, to a swirl-type chlorine dioxide generator. Background Technology

[0002] Small-scale chlorine dioxide generators are generally used for tap water disinfection and some wastewater disinfection. Because chlorine dioxide has broad-spectrum disinfection and sterilization capabilities, strong oxidizing properties, and high sterilization efficiency, it is also widely used in circulating water and oil unclogging, desulfurization and denitrification, cotton yarn bleaching, and other fields. However, these fields have higher requirements for chlorine dioxide production capacity and product concentration.

[0003] Currently, there are sodium chlorate & hydrochloric acid method, sodium chlorite & sodium hypochlorite & hydrochloric acid method, and sodium chlorite & hydrochloric acid method for preparing chlorine dioxide. However, conventional preparation equipment has the following problems: (1) Insufficient production capacity: The production capacity of a single chlorine dioxide generator is required to be greater than 100 kg / h, but the current mature chlorine dioxide generator is less than or equal to 20 kg / h; (2) Complex structure and high energy consumption: Chlorine dioxide generators need to be heated, aerated, reacted and stirred during operation, which results in a complex structure, high energy consumption and poor reliability; (3) Low product concentration: The concentration of the produced chlorine dioxide solution is only 200-300 ppm; it cannot meet the requirements in some situations where the ClO2 concentration is required to be ≥3000 ppm; (4) Low raw material conversion rate and low ClO2 yield: The raw material conversion rate of existing chlorine dioxide generators is only 80%, and the ClO2 yield is less than 65%.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The technical problem this invention aims to solve is that existing chlorine dioxide generators have complex structures, high energy consumption, low product concentration, and low production capacity. The goal is to provide a swirling chlorine dioxide generator. Through a special structural design at the raw material inlet and within the generator, the reactants can achieve rapid and thorough mixing at both the reactor inlet and reaction zone, increasing the reaction rate and making the reaction more complete. Simultaneously, improvements to the reactor's spatial structure provide ample diffusion space for the thermally expanding reaction liquid, controlling the residence time of the reaction liquid within the generator, reducing the generation of byproducts such as sodium chlorate, increasing the conversion rate of sodium chlorite, and ensuring a high yield of ClO2.

[0006] This utility model is achieved through the following technical solution: A cyclone chlorine dioxide generator includes a generator body, the bottom of which is provided with a raw material inlet, and a liquid inlet structure is installed at the raw material inlet. The liquid inlet structure includes an inner tube and an outer tube sleeved outside the inner tube; The upper end of the inner tube is closed, and an inlet hole is provided on the side wall of the inner tube. The lower end of the inner tube is used to add hydrochloric acid. The lower end of the outer tube is closed, and a liquid addition pipe is vertically installed on the side wall of the outer tube for adding sodium chlorite. The upper end of the outer tube is connected to the raw material addition port.

[0007] This invention, through a special structural design at the raw material inlet and within the generator, enables rapid and thorough mixing of the reactants at the generator's input point and in the reaction zone, thereby increasing the reaction rate and ensuring a more complete reaction. In use, hydrochloric acid solution enters the inner tube from the lower end, while the top is sealed. The hydrochloric acid then enters the outer tube through an inlet hole on its side wall. Sodium chlorite enters the outer tube horizontally from its side. The sodium chlorite and the hydrochloric acid flowing out through the small hole undergo a preliminary rapid mixing at the raw material inlet, resulting in an initial reaction. The mixed materials are then introduced into the generator body for a second mixing, further enhancing the mixing of the reaction solution and thus increasing the reaction rate.

[0008] In one specific embodiment, the generator body comprises an inverted cone section and a straight section from bottom to top, with the inverted cone section having a structure that is smaller at the bottom and larger at the top.

[0009] In one specific embodiment, variable pitch helical blades are provided in the inverted conical section and the straight section, and the pitch between the variable pitch helical blades gradually decreases from top to bottom, forming a variable pitch helical blade with a sparse upper and dense lower structure.

[0010] After the raw materials are mixed and undergo preliminary reaction at the inlet, they enter the generator body, which has an inverted conical section and a straight section. Through the improvement of the reactor's spatial structure, the inverted conical section, which has a structure that is smaller at the bottom and larger at the top and gradually expands upwards, provides sufficient diffusion space for the thermally expanding reaction liquid and controls the residence time of the reaction liquid in the generator. At the same time, variable pitch spirals are added to the inverted conical section and the straight section, which allows the reaction liquid to swirl and be further thoroughly mixed. In this way, by using an appropriate generator volume and providing internal space that meets the residence time requirements of the reaction liquid, the reaction can be mixed more thoroughly, reducing the generation of by-products such as sodium chlorate, and improving the conversion rate of sodium chlorite and the yield of ClO2.

[0011] In one specific embodiment, the generator body further includes a conical head disposed above the straight section. The conical head has a structure that is smaller at the top and larger at the bottom, and a liquid outlet is provided at the top of the conical head.

[0012] This invention uses a conical end cap, smaller at the top and larger at the bottom, to seal the outlet of the generator body, forming a conical constriction. This allows the generator to be completely filled with liquid during production, ensuring that the chlorine dioxide produced by the reaction is completely dissolved in the reaction liquid. This eliminates the possibility of chlorine dioxide accumulating in the gaseous phase in horizontal or concave areas, preventing the accumulation of gaseous chlorine dioxide and avoiding the danger of decomposition or explosion in the reactor when the gaseous concentration of chlorine dioxide exceeds 10%.

[0013] The generator of this invention has a vertical structure that is smaller at the bottom, larger in the middle, and smaller at the top. By using an appropriate effective space (generator volume) to achieve the residence time of the reaction liquid in the generator, the generation of by-products such as sodium chlorate can be reduced, thus ensuring a high yield of ClO2. At the same time, this invention eliminates the original aeration device and heating device, simplifies the original structure, and reduces operating energy consumption.

[0014] In one specific embodiment, an ejector is installed at the liquid outlet to extract the reaction product from the generator body.

[0015] This invention features an ejector at the generator outlet, which can promptly extract the finished chlorine dioxide from the generator for subsequent dilution to a specified concentration in subsequent processes. Furthermore, by controlling the discharge flow rate and pressure of the ejector, the pressure within the generator itself during the reaction can be controlled.

[0016] In one specific embodiment, an outlet elbow is installed above the jet injector, and the ends of the outlet elbow are respectively connected to a product liquid outlet and a process water inlet.

[0017] In one specific embodiment, a dilution water inlet is installed on the side wall of the inner tube. This allows for control of the concentration of hydrochloric acid added, and also enables the addition of water to quickly dilute the reaction solution and stop the reaction during normal shutdown or abnormal shutdown, ensuring that the material reaction can be started and stopped quickly.

[0018] In one specific embodiment, a safety release port is installed on the side wall of the outer tube, which can quickly discharge the reaction liquid in case of unsafe conditions such as abnormal pressure rise or overheating inside the generator, thus preventing safety accidents.

[0019] In one specific embodiment, the generator body is equipped with an air sweep inlet to further ensure that the generator can be safely and smoothly shut down in case of an abnormality.

[0020] In one specific embodiment, the generator body is also provided with a temperature measuring port and a pressure measuring port for installing a temperature sensor and a pressure sensor, for connecting with an external automatic control system to monitor the operating status inside the generator in real time.

[0021] In one specific embodiment, the generator body shell is provided with a heat insulation material layer to ensure the reaction rate, especially during the low temperature period in winter, to ensure that the raw material conversion is completed within a certain time.

[0022] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. The cyclone chlorine dioxide generator provided in this utility model embodiment, through the special structural design of the raw material inlet and the generator, enables the raw materials to achieve rapid and thorough mixing at the addition point and reaction zone of the reactor, thereby improving the reaction rate and making the reaction more complete. At the same time, through the improvement of the reactor spatial structure, it can provide sufficient diffusion space for the thermally expanding reaction liquid, control the residence time of the reaction liquid in the generator, reduce the generation of by-products such as sodium chlorate, improve the conversion rate of sodium chlorite, and ensure a high yield of ClO2. 2. The swirl-type chlorine dioxide generator provided in this utility model embodiment has a conical end cap with a smaller top and a larger bottom at the outlet of the generator body, forming a conical constriction. This allows the generator to be completely filled with liquid during production, so that the chlorine dioxide produced by the reaction is completely dissolved in the reaction liquid. This eliminates the possibility of chlorine dioxide accumulating in the gas phase region in horizontal or concave areas, prevents the accumulation of gaseous chlorine dioxide, and avoids the danger of decomposition or explosion in the reactor when the gas phase concentration of chlorine dioxide exceeds 10%. 3. The cyclone chlorine dioxide generator provided in this utility model embodiment has a single unit capacity that can exceed 20kg / h and reach 150kg / h. At the same time, the conversion rate of raw material sodium chlorite can reach 99%, and the ClO2 yield can reach more than 83%. If a larger capacity is to be achieved, multiple units can be operated in parallel. 4. The cyclone chlorine dioxide generator provided in this utility model embodiment can realize rapid start-up, shutdown, and resumption of the reaction. The time to stop the supply of chlorine dioxide during rapid shutdown can be less than 1 minute, and the concentration can be quickly reached to a high level (2000 ppm) within 2 minutes, and the concentration can reach more than 3000 ppm within 5 minutes. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the generator structure provided for an embodiment of this utility model.

[0025] Figure 2 This is a schematic diagram of the liquid inlet structure provided for an embodiment of the present invention.

[0026] The attached diagram shows the markings and corresponding component names: 1-Generator body, 11-Inverted conical section, 12-Straight section, 13-Conical head, 14-Gas sweeping inlet, 15-Temperature measuring port, 16-Pressure measuring port, 2-Liquid inlet structure, 21-Inner tube, 211-Liquid inlet hole, 212-Dilution water inlet, 22-Outer tube, 221-Liquid adding pipe, 222-Safety release port, 3-Variable pitch spiral blade, 4-Ejector, 5-Outlet elbow. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0028] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, well-known structures are not specifically described in order to avoid obscuring the present invention.

[0029] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0031] Example 1 like Figure 1 and Figure 2 As shown in the figure, the present invention provides a cyclone chlorine dioxide generator, including a generator body 1, a raw material feeding port at the bottom of the generator body 1, and a liquid inlet structure 2 installed at the raw material feeding port; The liquid inlet structure 2 includes an inner tube 21 and an outer tube 22 sleeved outside the inner tube 21; The upper end of the inner tube 21 is closed, and an inlet hole 211 is provided on the side wall of the inner tube 21. The lower end of the inner tube 21 is used to add hydrochloric acid. The lower end of the outer tube 22 is closed, and a liquid addition pipe 221 is vertically installed on the side wall of the outer tube 22. The liquid addition pipe 221 is used to add sodium chlorite, and the upper end of the outer tube 22 is connected to the raw material addition port.

[0032] This invention, through a special structural design at the raw material inlet and within the generator, enables rapid and thorough mixing of the reactants at the generator's input point and in the reaction zone, thereby increasing the reaction rate and ensuring a more complete reaction. In use, hydrochloric acid solution enters the inner tube from the lower end, while the top is sealed. The hydrochloric acid then enters the outer tube through an inlet hole on its side wall. Sodium chlorite enters the outer tube horizontally from its side. The sodium chlorite and the hydrochloric acid flowing out through the small hole undergo a preliminary rapid mixing at the raw material inlet, resulting in an initial reaction. The mixed materials are then introduced into the generator body for a second mixing, further enhancing the mixing of the reaction solution and thus increasing the reaction rate.

[0033] In one specific embodiment, the generator body 1 includes an inverted cone section 11 and a straight section 12 from bottom to top, and the inverted cone section 11 has a structure that is smaller at the bottom and larger at the top.

[0034] In a specific embodiment, variable pitch helical blades 3 are provided in the inverted conical section 11 and the straight section 12. The pitch between the variable pitch helical blades 3 gradually decreases from top to bottom, forming a variable pitch helical blade 3 with a sparse upper and dense lower structure.

[0035] After the raw materials are mixed and undergo preliminary reaction at the inlet, they enter the generator body, which has an inverted conical section and a straight section. Through the improvement of the reactor's spatial structure, the inverted conical section, which has a structure that is smaller at the bottom and larger at the top and gradually expands upwards, provides sufficient diffusion space for the thermally expanding reaction liquid and controls the residence time of the reaction liquid in the generator. At the same time, variable pitch spirals are added to the inverted conical section and the straight section, which allows the reaction liquid to swirl and be further thoroughly mixed. In this way, by using an appropriate generator volume and providing internal space that meets the residence time requirements of the reaction liquid, the reaction can be mixed more thoroughly, reducing the generation of by-products such as sodium chlorate, and improving the conversion rate of sodium chlorite and the yield of ClO2.

[0036] In one specific embodiment, the generator body 1 further includes a conical head 13 disposed above the straight section 12. The conical head 13 has a structure that is smaller at the top and larger at the bottom, and a liquid outlet is provided at the top of the conical head 13.

[0037] This invention uses a conical end cap, smaller at the top and larger at the bottom, to seal the outlet of the generator body, forming a conical constriction. This allows the generator to be completely filled with liquid during production, ensuring that the chlorine dioxide produced by the reaction is completely dissolved in the reaction liquid. This eliminates the possibility of chlorine dioxide accumulating in the gaseous phase in horizontal or concave areas, preventing the accumulation of gaseous chlorine dioxide and avoiding the danger of decomposition or explosion in the reactor when the gaseous concentration of chlorine dioxide exceeds 10%.

[0038] The generator of this invention has a vertical structure that is smaller at the bottom, larger in the middle, and smaller at the top. By using an appropriate effective space generator volume, the residence time of the reaction liquid in the generator can be achieved, thereby reducing the generation of byproducts such as sodium chlorate and ensuring a high yield of ClO2. At the same time, this invention eliminates the original aeration device and heating device, simplifies the original structure, and reduces operating energy consumption.

[0039] In one specific embodiment, an ejector 4 is installed at the liquid outlet to extract the reaction product from the generator body 1.

[0040] This invention features an ejector at the generator outlet, which can promptly extract the finished chlorine dioxide from the generator for subsequent dilution to a specified concentration in subsequent processes. Furthermore, by controlling the discharge flow rate and pressure of the ejector, the pressure within the generator itself during the reaction can be controlled.

[0041] In one specific embodiment, an outlet elbow 5 is installed above the jet injector 4, and the ends of the outlet elbow are respectively connected to a product liquid outlet and a process water inlet.

[0042] In one specific embodiment, a dilution water inlet 212 is installed on the side wall of the inner tube 21. On the one hand, it can control the concentration of hydrochloric acid added, and on the other hand, it can add water to quickly dilute the reaction solution and stop the reaction when the reaction is stopped normally or abnormally, so as to ensure that the material reaction can be started and stopped quickly.

[0043] In one specific embodiment, a safety release port 222 is installed on the side wall of the outer tube 22, which can quickly discharge the reaction liquid in case of unsafe conditions such as abnormal pressure rise or overheating in the generator, thus preventing safety accidents.

[0044] In one specific embodiment, an air sweep inlet 14 is installed on the generator body 1 to further ensure that the generator can be safely and smoothly shut down in case of abnormality.

[0045] In one specific embodiment, the generator body 1 is also provided with a temperature measuring port 15 and a pressure measuring port 16 for installing a temperature sensor and a pressure sensor, for connecting to an external automatic control system to monitor the operating status inside the generator in real time.

[0046] In one specific embodiment, the outer shell of the generator body 1 is provided with a heat insulation material layer to ensure the reaction rate, especially during the low temperature period in winter, to ensure that the raw material conversion is completed within a certain time.

[0047] 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 cyclone-type chlorine dioxide generator, characterized in that, Includes a generator body (1), the bottom of which is provided with a raw material feeding port, and a liquid inlet structure (2) is installed at the raw material feeding port. The liquid inlet structure (2) includes an inner tube (21) and an outer tube (22) sleeved outside the inner tube (21). The upper end of the inner tube (21) is closed, and an inlet hole (211) is provided on the side wall of the inner tube (21). The lower end of the inner tube (21) is used to add hydrochloric acid. The lower end of the outer tube (22) is closed, and a liquid addition tube (221) is vertically installed on the side wall of the outer tube (22). The liquid addition tube (221) is used to add sodium chlorite, and the upper end of the outer tube (22) is connected to the raw material addition port.

2. The cyclone chlorine dioxide generator according to claim 1, characterized in that, The generator body (1) includes an inverted cone section (11) and a straight section (12) from bottom to top. The inverted cone section (11) has a structure that is smaller at the bottom and larger at the top.

3. The cyclone chlorine dioxide generator according to claim 2, characterized in that, The inverted conical section (11) and the straight section (12) are provided with variable pitch helical blades (3). The pitch between the variable pitch helical blades (3) gradually decreases from top to bottom, forming a variable pitch helical blade (3) with a sparse upper and dense lower structure.

4. A cyclone-type chlorine dioxide generator according to claim 2, characterized in that, The generator body (1) also includes a conical head (13) disposed above the straight section (12). The conical head (13) has a structure that is smaller at the top and larger at the bottom, and a liquid outlet is provided at the top of the conical head (13).

5. A spin-flow chlorine dioxide generator according to claim 4, wherein An ejector (4) is installed at the liquid outlet to extract the reaction product from the generator body (1).

6. A spin-flow chlorine dioxide generator according to claim 5, wherein An outlet elbow (5) is installed above the jet injector (4).

7. A rotational flow chlorine dioxide generator according to claim 1, wherein A dilution water inlet (212) is installed on the side wall of the inner tube (21).

8. A rotational flow chlorine dioxide generator according to claim 1, wherein A safety release port (222) is installed on the side wall of the outer tube (22).

9. A spin-flow chlorine dioxide generator according to claim 1, wherein The generator body (1) is equipped with an air sweep inlet (14).

10. A cyclone-type chlorine dioxide generator according to claim 1, characterized in that, The generator body (1) is also provided with a temperature measuring port (15) and a pressure measuring port (16) for installing a temperature sensor and a pressure sensor.

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