Neutralization reaction equipment and wastewater treatment system
By using internal circulation mixing technology of gas lifting device and reflux tube in the neutralization reaction equipment, the problem that traditional stirring equipment cannot fully stir high viscosity reagents is solved, and a more efficient neutralization reaction is achieved, and equipment corrosion and foam contamination are prevented.
Patent Information
- Application Number
- CN202420685892.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-04-03
AI Technical Summary
Traditional mechanical stirring equipment cannot fully stir high-viscosity reagents in neutralization reactions, resulting in low reaction efficiency and may lead to concentrated corrosive reagents and causing equipment damage.
A neutralization reaction device is designed, using a gas lifting device and a return pipe to form internal circulation mixing. Through the pneumatic lifting effect and the circulation effect of the return pipe, a more sufficient stirring and mixing effect is achieved, and a foam removal component is set up to remove the generated foam.
Improves the efficiency of neutralization reaction, prevents equipment damage caused by the concentration of corrosive reagents, and improves reaction efficiency and environmental protection by removing foam.
Smart Images
Figure CN222715177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a neutralization reaction device and a wastewater treatment system, and more specifically to a neutralization reaction device with a more complete reaction and a wastewater treatment system comprising the neutralization reaction device. Background Art
[0002] In order to make the neutralization reaction in the neutralization reaction equipment more complete, the wastewater in the neutralization reaction equipment needs to be stirred. However, for traditional mechanical stirring, due to the uneven stirring speed gradient and power density, the reagents (especially high-viscosity reagents, such as concentrated sulfuric acid) cannot be fully stirred evenly. This not only reduces the efficiency of the neutralization reaction, but also may cause the reagents (especially corrosive reagents, such as concentrated sulfuric acid) to concentrate at a certain point and cause corrosion to the equipment.
[0003] Therefore, it is desired to provide a neutralization reaction device to overcome the deficiencies in the above-mentioned prior art. Utility Model Content
[0004] According to the first aspect of the utility model, a neutralization reaction device is proposed, comprising: a reaction part, in which a liquid undergoes a neutralization reaction, the reaction part comprising: a liquid inlet, in which the liquid enters the reaction part; a liquid outlet, in which the liquid leaves the reaction part; a feed inlet, in which a pH adjusting agent enters the reaction part; a separation part, which is arranged above the reaction part, in which the liquid and the gas are separated; wherein the neutralization reaction device also includes a mixing component, the mixing component includes a gas lift device and a reflux pipe, the gas lift device is configured to lift the liquid by an air lift effect, the reflux pipe connects the separation part with the reaction part, a part of the liquid is lifted from the reaction part to the separation part via the gas lift device, and flows back to the reaction part from the separation part via the reflux pipe.
[0005] According to this solution, the liquid is stirred and mixed by circulating in the gas stripping device and the reflux pipe, and the efficiency of the neutralization reaction is improved through more sufficient stirring and mixing, while also preventing corrosive reagents from concentrating at a certain point and causing damage to the equipment.
[0006] In some embodiments, the liquid inlet and the feed inlet may be disposed at the bottom of the reaction section, and the lower end of the reflux pipe extends to the bottom of the reaction section.
[0007] According to this solution, by circulating the liquid in the gas stripping device and the reflux pipe over a larger range, the stirring and mixing effect of the liquid is further enhanced, thereby further improving the efficiency of the neutralization reaction.
[0008] In some embodiments, the lower end of the gas stripping device may extend to the middle portion of the reaction section.
[0009] In some embodiments, the neutralization reaction equipment may further include a defoaming assembly, which is disposed above the separation section and configured to remove foam generated in the reaction section.
[0010] According to this solution, the foam is removed to prevent it from overflowing the neutralization reaction equipment and causing adverse effects on the environment, and at the same time, the reagent is prevented from being unable to fully contact the wastewater due to the presence of foam, thereby improving the efficiency of the neutralization reaction.
[0011] In some aspects, the defoaming assembly may include a water spraying component configured to spray water into the interior of the neutralization reaction device and / or a defoaming mesh belt having a mesh structure.
[0012] In some embodiments, the neutralization reaction equipment may further include a stirring device disposed at the bottom of the reaction part, wherein the stirring device is configured to stir the liquid in the reaction part.
[0013] According to this solution, the stirring intensity is further improved by using a stirring device, reducing the possibility of stirring dead corners, thereby further improving the efficiency of the neutralization reaction.
[0014] In some embodiments, the reaction part may be made of a material that is resistant to high temperatures and corrosion.
[0015] According to this solution, the high temperature resistant and corrosion resistant material can prevent the reaction part from being damaged by the heat release and corrosion of sulfuric acid.
[0016] In some embodiments, the height of the neutralization reaction equipment can be between 2 and 10 meters.
[0017] According to this solution, the reaction part is designed to be high enough so as to accommodate a large amount of steam and foam generated by the neutralization reaction, so as to facilitate the removal of foam in the liquid by the defoaming assembly.
[0018] In some aspects, the liquid may contain carbonate ions and / or bicarbonate ions.
[0019] According to the second aspect of the utility model, a wastewater treatment system is proposed for treating high-alkalinity phosphorus-containing wastewater. The wastewater treatment system includes the neutralization reaction equipment according to the first aspect of the utility model.
[0020] According to this solution, high alkalinity phosphorus-containing wastewater is first pre-treated by a neutralization reaction device to adjust the pH of the wastewater to approximately neutral, and then undergoes subsequent treatment to remove phosphorus from the wastewater. Because the neutralization reaction device according to the utility model has a higher neutralization reaction efficiency, the wastewater treatment system including the neutralization reaction device has a higher wastewater treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1A schematic diagram of a neutralization reaction device according to an embodiment of the utility model is shown.
[0022] Reference numerals:
[0023] 100 Neutralization reaction equipment
[0024] 110 Reaction Section
[0025] 112 Liquid inlet
[0026] 114 liquid outlet
[0027] 116 Feed port
[0028] 120 Separation Unit
[0029] 132 Gas stripping device
[0030] 134 Reflux pipe
[0031] 140 Defoaming components
[0032] 142 Water spray parts
[0033] 144 Defoaming mesh belt
[0034] 146 Connecting pipes
[0035] 150 Stirring device DETAILED DESCRIPTION
[0036] In order to make the purpose, scheme and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. Unless otherwise specified, the terms used in this article have the usual meanings in the art. The same reference numerals in the drawings represent the same components.
[0037] Figure 1 A schematic diagram of a neutralization reaction device 100 according to an embodiment of the utility model is shown, and the neutralization reaction device 100 mainly includes a reaction part 110 and a separation part 120 arranged above the reaction part 110, and the reaction part 110 includes a liquid inlet 112, a liquid outlet 114 and a feed inlet 116. The liquid to be neutralized (for example, alkaline wastewater containing carbonate ions or bicarbonate ions) enters the reaction part 110 from the liquid inlet 112, then undergoes a neutralization reaction with a pH adjusting agent (for example, sulfuric acid) entering the reaction part 110 from the feed inlet 116, and finally leaves the reaction part 110 from the liquid outlet 114.
[0038] In order to make the neutralization reaction between the liquid to be neutralized and the pH adjusting agent more complete, the liquid in the reaction part 110 needs to be fully mixed. To this end, the neutralization reaction equipment 100 also includes a mixing component, which includes a gas stripping device 132, a reflux pipe 134 and a stirring device 150, wherein the gas stripping device 132 and the reflux pipe 134 form an internal circulation mixing (different from the mixing caused by the stirring device 150, the internal circulation mixing belongs to unpowered mixing). Specifically, the gas stripping device 132 is configured to lift the liquid in the reaction part 110 through the gas lifting effect, and the reflux pipe 134 connects the separation part 120 with the reaction part 110. In this configuration, as sulfuric acid reacts chemically with carbonate or bicarbonate, the generated carbon dioxide gas rises due to its lower density than water. When the gas rises to the stripping device 132, the liquid in the reaction part 110 is lifted to the separation part 120 through the stripping device 132 under the effect of gas lifting effect; in the separation part 120, the gas (e.g., generated carbon dioxide, etc.) and the liquid are separated, the gas is discharged from the top of the separation part 120, and the liquid is discharged from the bottom of the separation part 120; the liquid discharged from the bottom of the separation part 120 flows back to the reaction part 110 through the reflux pipe 134 under the action of gravity. The above process realizes the stirring and mixing effect by circulating the liquid in the stripping device 132 and the reflux pipe 134, and the efficiency of the neutralization reaction is improved through more sufficient stirring and mixing, while also preventing the corrosive reagent from being concentrated at a certain point and causing damage to the equipment.
[0039] Preferably, the liquid inlet 112 and the feed inlet 116 can be arranged at the bottom of the reaction part 110, and the lower end of the reflux pipe 134 extends to the bottom of the reaction part 110. In this configuration, the liquid travels in a larger range in the mixing assembly (i.e., the gas stripping device 132 and the reflux pipe 134), so that the stirring and mixing effect of the liquid is further enhanced, thereby further improving the efficiency of the neutralization reaction. It should be understood that the bottom of the reaction part 110 refers to an area close to the bottom wall of the reaction part 110, for example, an area whose distance from the bottom wall of the reaction part 110 is less than 10% of the overall height of the reaction part 110.
[0040] Preferably, the lower end of the stripping device 132 may extend to the middle portion of the reaction part 110. It should be understood that the middle portion of the reaction part 110 refers to, for example, a region whose distance from the bottom wall of the reaction part 110 is between 40% and 60% of the overall height of the reaction part 110.
[0041] Preferably, the neutralization reaction equipment 100 may also include a defoaming assembly 140, which is arranged above the separation part 120, and the defoaming assembly 140 is configured to remove the foam generated in the reaction part 110. Due to the high alkalinity wastewater and sulfuric acid producing a large amount of carbon dioxide and water vapor, a large amount of gas and impurities in the water will produce a large amount of dense foam, part of the foam is filled in the gas phase space above the water surface, and part of the foam is located in the middle and lower part of the reaction part 110, which may cause the reagent to be unable to contact the wastewater and reduce the neutralization reaction efficiency. And, once these foams overflow the neutralization reaction equipment 100, it will have an adverse effect on the environment. For this reason, the foam is removed by using the defoaming assembly 140 to prevent the reagent from being unable to fully contact the wastewater due to the presence of foam, thereby improving the efficiency of the neutralization reaction, and preventing the foam from polluting the environment. Specifically, the foam located in the gas phase space enters the separation part 120 through the connecting pipe 146, and the foam located in the middle and lower part of the reaction part 110 enters the separation part 120 through the gas stripping device 132, and then the foam entering the separation part 120 is removed by the defoaming assembly 140. Optionally, the defoaming assembly 140 may include a water spraying component 142 configured to spray water into the neutralization reaction device 100 and / or a defoaming mesh belt 144 having a mesh structure.
[0042] Preferably, the neutralization reaction device 100 may further include a stirring device 150 disposed at the bottom of the reaction part 110, and the stirring device 150 is configured to stir the liquid in the reaction part 110. The stirring device 150 further improves the stirring intensity, reduces the possibility of a stirring dead angle, and further improves the efficiency of the neutralization reaction.
[0043] Optionally, the stirring device 150 may be a hydraulic stirring device. Water is uniformly sprayed out through the hydraulic stirring release devices uniformly arranged at the bottom of the reaction part 110, forming a circulation at the bottom of the reaction part 110. The energy carried by the circulation allows the entire reaction part 110 to be in a uniform stirring and mixing state, reducing the mixing and stirring dead angle.
[0044] Alternatively, the stirring device 150 may be a pneumatic stirring device. Through a plurality of air release devices evenly arranged at the bottom of the reaction part 110, dense bubbles are evenly released from the bottom of the reaction part 110 to the entire reaction part 110. In this way, the stirring intensity and energy density in the entire reaction part 110 are more consistent, reducing the occurrence of stirring or mixing dead corners.
[0045] Preferably, the reaction part 110 can be made of a high temperature resistant and corrosion resistant material. Since sulfuric acid and wastewater react to generate a large amount of heat, and even boiling occurs locally, traditional carbon steel anti-corrosion cannot cope with such a working environment, and the anti-corrosion layer is easily damaged. After the anti-corrosion layer is damaged, the base layer of the carbon steel is exposed, directly facing various pollutants and high temperatures in the water, and the exposed carbon steel body may peel off or perforate in a very short time. For this reason, the use of high temperature resistant and corrosion resistant materials can prevent the reaction part 110 from being damaged by the heat release and corrosion of sulfuric acid.
[0046] Preferably, the height of the neutralization reaction device 100 can be between 2 and 10 meters. In this configuration, by designing a sufficiently high reaction unit 110, a large amount of steam and foam generated by the neutralization reaction can be accommodated, so that the foam in the liquid can be removed by the defoaming assembly 140 (i.e., the water spraying component 142 and the defoaming mesh belt 144).
[0047] The neutralization reaction device 100 of the utility model can be particularly used in wastewater treatment systems, such as treating high-alkalinity phosphorus-containing wastewater. Since excessive alkalinity may kill microorganisms used for biochemical treatment, it is necessary to lower the alkalinity of the wastewater before the wastewater enters the biochemical treatment tank. Specifically, the high-alkalinity phosphorus-containing wastewater is first pre-treated by the neutralization reaction device 100 to adjust the pH of the wastewater to approximately neutral, and then undergoes subsequent treatment (e.g., physicochemical treatment, biochemical treatment or advanced oxidation treatment, etc.) to remove phosphorus from the wastewater. Because the neutralization reaction device 100 according to the utility model has a higher neutralization reaction efficiency, the wastewater treatment system including it has a higher wastewater treatment efficiency.
[0048] This document describes in detail several exemplary embodiments of the present invention with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined without exceeding the protection scope of the present invention, which is determined by the appended claims.
Claims
1. A neutralization reaction device, characterized in that: include: A reaction part, in which a liquid undergoes a neutralization reaction, and the reaction part comprises: a liquid inlet, through which the liquid enters the reaction part; a liquid outlet, through which the liquid leaves the reaction part; A feed inlet, from which a pH adjusting reagent enters the reaction part; A separation part, arranged above the reaction part, wherein the liquid and the gas are separated in the separation part; Wherein, the neutralization reaction equipment also includes a mixing component, which includes a gas lift device and a reflux pipe, the gas lift device is configured to lift the liquid through an air lift effect, and the reflux pipe connects the separation part with the reaction part, a portion of the liquid is lifted from the reaction part to the separation part via the gas lift device, and flows back from the separation part to the reaction part via the reflux pipe.
2. The neutralization reaction equipment according to claim 1, characterized in that: The liquid inlet and the feed inlet are arranged at the bottom of the reaction part, and the lower end of the reflux pipe extends to the bottom of the reaction part.
3. The neutralization reaction equipment according to claim 2, characterized in that: The lower end of the gas stripping device extends to the middle part of the reaction part.
4. The neutralization reaction equipment according to claim 1, characterized in that: It also includes a defoaming assembly, which is arranged above the separation part and is configured to remove foam generated in the reaction part.
5. The neutralization reaction equipment according to claim 4, characterized in that: The defoaming assembly includes a water spraying component configured to spray water into the interior of the neutralization reaction equipment and / or a defoaming mesh belt with a mesh structure.
6. The neutralization reaction equipment according to claim 1, characterized in that: Also included is a stirring device disposed at the bottom of the reaction part, wherein the stirring device is configured to stir the liquid in the reaction part.
7. The neutralization reaction equipment according to claim 1, characterized in that: The reaction part is made of a high temperature resistant and corrosion resistant material.
8. The neutralization reaction equipment according to claim 1, characterized in that: The height of the neutralization reaction equipment is between 2 and 10 meters.
9. The neutralization reaction equipment according to claim 1, characterized in that: The liquid contains carbonate ions and / or bicarbonate ions.
10. A wastewater treatment system for treating high-alkalinity phosphorus-containing wastewater, characterized in that: It comprises the neutralization reaction equipment according to any one of claims 1 to 9.