Online treatment device for by-products of chlorine dioxide generator

Abstract

The utility model discloses an on-line treatment device for chlorine dioxide generator by-products, which relates to the technical field of chlorine dioxide preparation and comprises a shell, a chlorine dioxide generator by-product feeding system arranged in the shell, a ferrite solution feeding system, a mixing reactor and a water ejector. The mixing reactor comprises a jet mixer arranged at the inlet end, the chlorine dioxide generator by-product feeding system and the ferrite solution feeding system are both connected with an inlet of the jet mixer, and the outlet end of the mixing reactor is connected with a side suction port of the water ejector. The water injector sucks reaction liquid from the mixing reactor and mixes the reaction liquid with water; the device disclosed by the utility model realizes on-line treatment of by-products of the chlorine dioxide generator, is good in treatment effect, free of generation of new wastes, free of discharge of waste liquids and waste solids, simple in structure, low in investment cost and simple and easy to operate, and avoids environmental pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of chlorine dioxide preparation, and particularly relates to an on-line treatment device for by-products of a chlorine dioxide generator. Background Art

[0002] Chlorine dioxide disinfectant is a highly efficient disinfectant and sterilizer recognized internationally. It can kill all microorganisms, including bacterial propagules, bacterial spores, fungi, mycobacteria, and viruses, and these bacteria will not develop drug resistance. A common method for preparing chlorine dioxide is to add sodium chlorate and acid to a reactor to react and generate chlorine dioxide; an air inlet pipe is also provided at the input end of the reactor, and the output end of the reactor is connected to a water injector. A negative pressure is formed in the reactor through the action of the water injector, and air is sucked into the reactor from the air inlet pipe. The air flowing into the reactor takes out the chlorine dioxide gas and mixes it with water to form a disinfectant solution. After the raw materials in the generator generate chlorine dioxide, there are still some by-products and unreacted raw materials (sodium chlorate, sulfuric acid, chlorite, sodium sulfate).

[0003] At present, the generators for preparing chlorine dioxide on the market adopt two treatment methods for by-products: one is to directly add the by-products to the water injector of the generator together with chlorine dioxide to form a disinfectant solution and then add it to tap water without treating the by-products, which easily causes the chlorate and chlorite in tap water to exceed the standard, and the pH value of tap water decreases, failing to meet the requirements of the national drinking water quality standard; the other is to configure a by-product separation device for the generator to separate the by-products and conduct centralized treatment, but the equipment for centralized treatment has large investment, high energy consumption, large floor area, and complex operation.

[0004] In order to overcome the above drawbacks of the chlorine dioxide generator, through years of continuous exploration and innovation, we have developed a new type of on-line treatment equipment for disinfection by-products of a chlorine dioxide generator, which is dedicated to treating the by-products of the chlorine dioxide generator. Summary of the Utility Model

[0005] The utility model aims to solve the technical problems that the by-products of the existing chlorine dioxide generator are either not treated, or the energy consumption is large, the cost is high, the floor area is large, the operation is complex after separation and centralized treatment, and there is a lack of a supporting on-line treatment device for by-products. The purpose is to provide an on-line treatment device for by-products of a chlorine dioxide generator, which realizes the on-line treatment of by-products of the chlorine dioxide generator, has good treatment effect, does not generate new waste, does not discharge waste liquid and solid waste, avoids environmental pollution, has a simple device structure, small investment cost, simple operation, and operates in on-line linkage with the chlorine dioxide generator.

[0006] The utility model is realized through the following technical solutions:

[0007] An on-line treatment device for by-products of a chlorine dioxide generator, comprising a housing, a chlorine dioxide generator by-product feeding system, a ferrous salt solution feeding system, a mixing reactor and a water injector arranged inside the housing; the mixing reactor includes an injection mixer arranged at the inlet end, the chlorine dioxide generator by-product feeding system and the ferrous salt solution feeding system are both connected to the inlet of the injection mixer, the outlet end of the mixing reactor is connected to the side suction port of the water injector, and the water injector sucks the reaction liquid from the mixing reactor and mixes it with water.

[0008] Further, the chlorine dioxide generator by-product feeding system includes a chlorine dioxide generator by-product inlet pipe, the inlet end of the chlorine dioxide generator by-product inlet pipe is connected to the chlorine dioxide generator by-product inlet on the housing, and the outlet end of the chlorine dioxide generator by-product inlet pipe is connected to the inlet of the injection mixer.

[0009] Further, the ferrous salt solution feeding system includes a ferrous salt solution inlet pipe, the inlet end of the ferrous salt solution inlet pipe is connected to the ferrous salt solution inlet on the housing, and the outlet end of the ferrous salt solution inlet pipe is connected to the inlet of the injection mixer.

[0010] Further, the ferrous salt solution feeding system includes a ferrous salt solution metering pump and a flow calibration column arranged on the pipeline.

[0011] Further, a motive water pressure gauge, a dosing pipe pressure gauge and a mixing reactor pressure gauge are respectively arranged on the pipeline connected to the inlet of the water injector, the pipeline connected to the outlet of the water injector and the mixing reactor, and the ferrous salt solution metering pump, the motive water pressure gauge, the dosing pipe pressure gauge and the mixing reactor pressure gauge are all connected to the control system.

[0012] Further, the mixing reactor further includes a reaction chamber, and the inlet of the reaction chamber is connected to the outlet of the injection mixer.

[0013] Further, a plurality of baffle plates are arranged on the inner wall of the reaction chamber.

[0014] Further, the injection mixer includes a mixing chamber, a ferrous salt solution feed port, an injection channel and a chlorine dioxide generator by-product feed port, the ferrous salt solution feed port is connected to the mixing chamber through the injection channel, and the chlorine dioxide generator by-product feed port is connected to the mixing chamber.

[0015] Further, the injection channel is arranged along the tangential direction of the mixing chamber.

[0016] Further, the inlet of the water injector is connected to the motive water inlet on the housing through a motive water pipe, and the outlet of the water injector is connected to the finished product reaction liquid outlet through a dosing pipe.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] 1. The online treatment device of the utility model realizes the online treatment of the by-products of the chlorine dioxide generator. The unreacted raw materials of sodium chlorate, sulfuric acid and ferrous iron are reacted with ferrous salt solutions such as ferrous sulfate or ferrous chloride to directly generate trivalent iron salt (ferric sulfate or ferric chloride) solution, which can be used as a flocculant for source water purification. The by-product treatment effect of the chlorine dioxide generator is good, no new waste is generated, no waste liquid and waste solid are discharged, and environmental pollution is avoided. The device has a simple structure, low investment cost, simple operation, and can be linked with the chlorine dioxide generator.

[0019] 2. The utility model sets a jet mixer in the mixing reactor, so that the ferrous salt solution enters the jet channel from the ferrous salt solution feed port, is jetted into the mixing chamber, and strongly impacts with the generator byproduct solution entering from the chlorine dioxide generator byproduct feed port, is fully mixed, and makes the subsequent reaction more complete.

[0020] 3. The utility model arranges the injection channel along the tangential direction of the mixing chamber, and opens an injection hole at a position on the mixing chamber connected with the injection channel. The injection channel is a circular channel, and the diameter gradually decreases toward one end close to the injection hole. The ferrous salt solution enters the injection channel from the ferrous salt solution feed port, and is sprayed into the injection mixer from the tangential direction through the injection port, and is quickly mixed with the by-product solution of the chlorine dioxide generator, so that the reaction speed is increased. At the same time, the sprayed ferrous salt solution can strongly impact the by-product solution of the chlorine dioxide generator, thereby improving the mixing effect, thereby ensuring the adequacy of the reaction.

[0021] 4. The utility model can control the flow direction of the reaction liquid by adding baffles in the mixing reactor. The reaction liquid flows out from the reaction liquid discharge port after passing through the baffles at each level, and can prevent the reaction liquid from short-circuiting, increase the reaction time of the reaction liquid, and ensure sufficient reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a mixing reactor;

[0025] Figure 3 is a schematic diagram of the structure of a jet mixer;

[0026] Figure 4 A cross-sectional view of the internal structure of the jet mixer.

[0027] Reference numerals in the drawings and the corresponding component names:

[0028] 1 - housing, 101 - motive water inlet, 102 - finished reaction liquid outlet, 103 - by - product inlet of chlorine dioxide generator, 104 - ferrous salt solution inlet, 2 - control system, 3 - motive water pressure gauge, 4 - dosing pipe pressure gauge, 5 - water injector, 6 - motive water pipe, 7 - dosing pipe, 8 - mixing reactor pressure gauge, 9 - mixing reactor, 901 - outer shell, 902 - jet mixer, 9021 - mixing chamber, 9022 - ferrous salt solution feed port, 9023 - jet channel, 9024 - by - product feed port of chlorine dioxide generator, 9025 - jet hole, 903 - reaction chamber, 904 - baffle plate, 905 - reaction liquid discharge port, 10 - by - product inlet pipe of chlorine dioxide generator, 11 - ferrous salt solution inlet pipe, 12 - ferrous salt solution metering pump, 13 - flow calibration column. Detailed implementation manners

[0029] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and are not intended to limit the present utility model.

[0030] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, it is obvious to those of ordinary skill in the art that the present utility model does not have to employ these specific details. In other embodiments, well - known structures, circuits, materials or methods are not specifically described in order to avoid obscuring the present utility model.

[0031] Throughout the specification, references to "one embodiment", "an embodiment", "one example" or "an example" mean that a particular feature, structure or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present utility model. Thus, the phrases "one embodiment", "an embodiment", "one example" or "an example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Additionally, the specific features, structures or characteristics may be combined in any suitable combination and / or sub - combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0032] In the description of the present utility model, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

[0033] Embodiment

[0034] This embodiment provides an on-line treatment device for by-products of a chlorine dioxide generator, as Figures 1-4 shown, which includes a housing 1, a by-product feeding system of a chlorine dioxide generator, a ferrous salt solution feeding system, a mixing reactor 9 and a water injector 5 arranged inside the housing 1; the mixing reactor 9 includes an injection mixer 902 arranged at the inlet end, the by-product feeding system of the chlorine dioxide generator and the ferrous salt solution feeding system are both connected to the inlet of the injection mixer 902, the outlet end of the mixing reactor 9 is connected to the side suction port of the water injector 5, and the water injector 5 sucks the reaction liquid from the mixing reactor 9 and mixes it with water.

[0035] Among them, the ferrous salt solution feeding system includes a ferrous salt solution metering pump 12 and a flow calibration column 13 arranged on the pipeline.

[0036] A dynamic water pressure gauge 3, a dosing pipe pressure gauge 4 and a mixing reactor pressure gauge 8 are respectively arranged on the pipeline connected to the inlet of the water injector 5, the pipeline connected to the outlet of the water injector 5 and the mixing reactor 9, and the ferrous salt solution metering pump 12, the dynamic water pressure gauge 3, the dosing pipe pressure gauge 4 and the mixing reactor pressure gauge 8 are all connected to a control system 2.

[0037] The inlet of the water injector 5 is connected to a dynamic water inlet 101 on the housing 1 through a dynamic water pipe 6, and the outlet of the water injector 5 is connected to a finished product reaction liquid outlet 102 through a dosing pipe 7.

[0038] When the device of the present utility model is in use, turn on the power supply of the control system 2, set the control parameters of the control system 2, open the valves on the connecting pipelines at the inlet and outlet of the water injector 5, and evacuate the mixing reactor 9 to a negative pressure of 50 - 150 KPa to facilitate sucking the by-products of the chlorine dioxide generator into the mixing reactor 9. The by-product feeding system of the chlorine dioxide generator and the ferrous salt solution feeding system respectively feed the by-products of the generator and the ferrous salt solution. Open the valves on the ferrous salt solution inlet pipe 11 and the chlorine dioxide generator by-product inlet pipe 10. When the chlorine dioxide generator operates, it transmits an operation signal to the control system 2. The control system 2 conveys the operation signal to the ferrous salt solution metering pump 12 according to the operation load of the chlorine dioxide generator. The ferrous salt solution metering pump 12 pumps the required ferrous solution into the jet mixer 902 at the inlet end of the mixing reactor 9, and fully mixes with the by-product solution from the chlorine dioxide generator through the jet mixer 902, and then enters the mixing reactor 9 for reaction to generate ferric salt solution. The ferric salt solution enters the water injector 5 from the outlet end of the mixing reactor 9, mixes with the water from the power water pipe 6 in the water injector 5 to form a finished reaction liquid, and flows out through the dosing pipe 7, and can be dosed to the flocculant dosing point of the waterworks for the purification of raw water.

[0039] Through the on-line treatment device of the present utility model, the on-line treatment of the by-products of the chlorine dioxide generator is realized. Ferrous salt solutions such as ferrous sulfate or ferrous chloride are used to directly react the unreacted raw materials sodium chlorate, sulfuric acid and ferrous to generate ferric salt (ferric sulfate or ferric chloride) solution, which can be used as a flocculant for raw water purification. The treatment effect on the by-products of the chlorine dioxide generator is good, no new waste is generated, no waste liquid or solid waste is discharged, environmental pollution is avoided, the device structure is simple, the investment cost is small, and the operation is simple and easy.

[0040] In addition, for the device of the present utility model, according to the amount of chlorite formed after pre-oxidation in the waterworks, the required amount of ferrous can be synchronously added to the front end of the waterworks flocculation reaction tank and mixed with the raw water to decompose the chlorite in the water and remove the chlorite formed by pre-chlorination.

[0041] In one or more embodiments of the present utility model, the by-product feeding system of the chlorine dioxide generator includes a chlorine dioxide generator by-product inlet pipe 10. The inlet end of the chlorine dioxide generator by-product inlet pipe 10 is connected to the chlorine dioxide generator by-product inlet 103 on the housing 1, and the outlet end of the chlorine dioxide generator by-product inlet pipe 10 is connected to the inlet of the jet mixer 902. Through the chlorine dioxide generator by-product inlet pipe 10, the by-products of the chlorine dioxide generator can be introduced into the mixing reactor 9 to be mixed with the ferrous salt solution. Ferrous salt solutions such as ferrous sulfate or ferrous chloride are used to directly react the unreacted raw materials sodium chlorate, sulfuric acid and ferrous in the by-products to generate ferric salt (ferric sulfate or ferric chloride) and add it to the front end of the tap water for water purification treatment.

[0042] In one or more embodiments of the present utility model, the ferrous salt solution feeding system includes a ferrous salt solution inlet pipe 11. The inlet end of the ferrous salt solution inlet pipe 11 is connected to the ferrous salt solution inlet 104 on the housing 1, and the outlet end of the ferrous salt solution inlet pipe 11 is connected to the inlet of the jet mixer 902. Through the ferrous salt solution inlet pipe 11, the ferrous salt solution can be introduced into the mixing reactor 9 to be mixed with the by-product solution of the chlorine dioxide generator. By using ferrous salt solutions such as ferrous sulfate or ferrous chloride, the unreacted raw materials sodium chlorate, sulfuric acid in the by-product react with ferrous to directly generate ferric salts (ferric sulfate or ferric chloride), which are added to the front end of the tap water for water purification treatment.

[0043] In one or more embodiments of the present utility model, as Figure 2 shown, the mixing reactor 9 further includes a reaction chamber 903. The reaction chamber 903 is arranged inside the outer shell 901, and the inlet of the reaction chamber 903 is connected to the outlet of the jet mixer 902. The by-product solution of the chlorine dioxide generator and the ferrous salt solution are quickly and fully mixed in the jet mixer 902, and then enter the reaction chamber 903 of the mixing reactor 9, where they further react, and then flow out from the reaction liquid discharge port 905 of the mixing reactor 9 and enter the water injector 5 to be mixed with the water in the water injector 5 to form a finished iron salt solution, which can be used for dosing at the flocculant dosing point of the waterworks for the purification of raw water.

[0044] As a preferred solution, a plurality of baffle plates 904 are arranged on the inner wall of the reaction chamber 903. By adding the baffle plates 904 in the mixing reactor 9, the flow direction of the reaction liquid can be controlled. The reaction liquid flows out from the reaction liquid discharge port 905 after passing through each stage of the baffle plates 904, which can prevent the reaction liquid from short-circuiting, increase the reaction time of the reaction liquid, and also increase the mixing effect to ensure sufficient reaction. The number of the baffle plates 904 is preferably 3 - 10, and more preferably 6 baffle plates 904.

[0045] In one or more embodiments of the present utility model, as Figure 3 and 4As shown, the jet mixer 902 includes a mixing chamber 9021, a ferrous salt solution inlet 9022, a jet channel 9023, and a by-product inlet 9024 of the chlorine dioxide generator. The ferrous salt solution inlet 9022 is connected to the mixing chamber 9021 through the jet channel 9023, and the by-product inlet 9024 of the chlorine dioxide generator is connected to the mixing chamber 9021. The jet mixer 902 is fixed to the outer shell 901 of the mixing reactor 9 by welding or bonding. The ferrous salt solution enters the jet channel 9023 from the ferrous salt solution inlet 9022, is jetted into the mixing chamber 9021, strongly impacts the by-product solution of the chlorine dioxide generator entering from the by-product inlet 9024 of the chlorine dioxide generator, and is fully mixed. The mixed reaction solution flows out of the mixing chamber 9021 and enters the reaction chamber 903, flows through the baffle plates 904 at all levels, and flows out after full reaction.

[0046] Specifically, the jet channel 9023 is arranged along the tangential direction of the mixing chamber 9021. A jet hole 9025 is opened at the position where the mixing chamber 9021 communicates with the jet channel 9023. The jet channel 9023 is a circular channel, and the diameter gradually decreases towards the end close to the jet hole 9025. The ferrous salt solution enters the jet channel 9023 from the ferrous salt solution inlet 9022, is jetted into the mixing chamber 9021 from the tangential direction of the jet mixer 902 through the jet port, and is quickly mixed with the by-product solution of the chlorine dioxide generator, so as to increase the reaction speed. At the same time, the jetted ferrous salt solution can strongly impact the by-product solution of the chlorine dioxide generator, improving the mixing effect, thereby ensuring the full degree of the reaction. By arranging the jet channel 9023 along the tangential direction of the mixing chamber 9021, the ferrous salt solution can be jetted in along the tangential direction to increase the jet speed. At the same time, by designing the jet channel 9023 to have a gradually decreasing diameter towards the end close to the jet hole 9025, the jet speed can be further increased and the mixing effect can be improved.

[0047] In the present utility model, both the mixing reactor 9 and the jet mixer 902 are made of corrosion-resistant CPVC or PVC materials. Specifically, PVC or CPVC pipes with a diameter of Φ110 - 250 mm can be used for manufacturing, and the length is 600 mm - 1200 mm. The outer diameter of the jet mixer 902 matches the inner diameter of the mixing reactor 9. The jet hole 9025 communicating with the jet channel 9023 on the jet mixer 902 is Φ2 mm - Φ6 mm. The corrosion-resistant CPVC or PVC materials can well meet the corrosiveness requirements of the reaction medium.

[0048] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above description is only for the specific embodiments of the present utility model and is not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An online treatment device for by-products of a chlorine dioxide generator, characterized in that: The invention comprises a shell (1), a chlorine dioxide generator byproduct feeding system, a ferrous salt solution feeding system, a mixing reactor (9) and a water ejector (5) arranged inside the shell (1); the mixing reactor (9) comprises a jet mixer (902) arranged at an inlet end, the chlorine dioxide generator byproduct feeding system and the ferrous salt solution feeding system are both connected to the inlet of the jet mixer (902), the outlet end of the mixing reactor (9) is connected to the side suction port of the water ejector (5), and the water ejector (5) sucks the reaction liquid from the mixing reactor (9) and mixes it with water.

2. An online treatment device for by-products of a chlorine dioxide generator according to claim 1, characterized in that: The chlorine dioxide generator byproduct feeding system comprises a chlorine dioxide generator byproduct inlet pipe (10), the inlet end of the chlorine dioxide generator byproduct inlet pipe (10) is connected to the chlorine dioxide generator byproduct inlet (103) on the shell (1), and the outlet end of the chlorine dioxide generator byproduct inlet pipe (10) is connected to the inlet of the jet mixer (902).

3. An online treatment device for by-products of a chlorine dioxide generator according to claim 1, characterized in that: The ferrous salt solution feeding system comprises a ferrous salt solution inlet pipe (11), the inlet end of the ferrous salt solution inlet pipe (11) is connected to the ferrous salt solution inlet (104) on the shell (1), and the outlet end of the ferrous salt solution inlet pipe (11) is connected to the inlet of the jet mixer (902).

4. The online treatment device for byproducts of a chlorine dioxide generator according to claim 1, characterized in that: The ferrous salt solution feeding system comprises a ferrous salt solution metering pump (12) and a flow correction column (13) arranged on a pipeline.

5. An online treatment device for by-products of a chlorine dioxide generator according to claim 4, characterized in that: A power water pressure gauge (3), a dosing pipe pressure gauge (4) and a mixing reactor pressure gauge (8) are respectively provided on the pipeline connected to the inlet of the water ejector (5), the pipeline connected to the outlet of the water ejector (5) and the mixing reactor (9); the ferrous salt solution metering pump (12), the power water pressure gauge (3), the dosing pipe pressure gauge (4) and the mixing reactor pressure gauge (8) are all connected to the control system (2).

6. The online treatment device for byproducts of a chlorine dioxide generator according to claim 1, characterized in that: The mixing reactor (9) further comprises a reaction chamber (903), the inlet of the reaction chamber (903) being connected to the outlet of the jet mixer (902).

7. An online treatment device for by-products of a chlorine dioxide generator according to claim 6, characterized in that: The inner wall of the reaction chamber (903) is provided with a plurality of baffles (904).

8. An online treatment device for byproducts of a chlorine dioxide generator according to claim 1, characterized in that: The jet mixer (902) comprises a mixing chamber (9021), a ferrous salt solution feed port (9022), a jet channel (9023) and a chlorine dioxide generator byproduct feed port (9024); the ferrous salt solution feed port (9022) is connected to the mixing chamber (9021) via the jet channel (9023), and the chlorine dioxide generator byproduct feed port (9024) is connected to the mixing chamber (9021).

9. An online treatment device for by-products of a chlorine dioxide generator according to claim 8, characterized in that: The injection channel (9023) is arranged along the tangent direction of the mixing chamber (9021).

10. An online treatment device for by-products of a chlorine dioxide generator according to any one of claims 1 to 9, characterized in that: The inlet of the water ejector (5) is connected to the power water inlet (101) on the housing (1) via a power water pipe (6), and the outlet of the water ejector (5) is connected to the finished reaction liquid outlet (102) via a dosing pipe (7).

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