A pH regulating tank

Abstract

The utility model relates to a chemical industry technical field, concretely relates to a kind of pH adjusting pool.One kind of pH adjusting pool includes rectangular box, baffle group and aeration system.Rectangular box inside forms processing cavity, and rectangular box is provided with wastewater outlet and blow-off port.Baffle group includes multiple first baffle and multiple second baffle forming S-shaped baffle passage.First aeration hole and second aeration hole are alternately opened in the horizontal aeration pipeline along its axial direction two sides pipe wall, and the axis of first aeration hole and second aeration hole is arranged along the radial direction of aeration pipe, and is inclined to the horizontal direction by a predetermined angle downward.The utility model can realize efficient mixing and cyclone stirring, and use airflow backwash force to clean and prevent blockage, ultimately achieve the effect of rapid and uniform pH adjustment, stable system operation and easy maintenance.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a pH adjustment tank. Background Technology

[0002] Chemical production processes typically consume large quantities of organic chemical raw materials, while also generating various byproducts and salts. These byproducts and salts are mostly discharged with wastewater, resulting in complex wastewater composition, particularly containing various toxic organic compounds. This causes serious environmental pollution, failing to meet environmental protection requirements and wasting resources. Wastewater treatment has always been a significant technical challenge for chemical enterprises, especially when wastewater contains recalcitrant organic matter. Using single physicochemical or biological treatment methods is often insufficient to achieve ideal results, leaving residual recalcitrant organic matter in the effluent and failing to meet national discharge standards.

[0003] Taking the production of sponge titanium and titanium dioxide as examples, the main raw material is titanium tetrachloride (TiCl4). For titanium slag raw materials with calcium and magnesium mass fractions exceeding 5%, molten salt chlorination is currently the most suitable production process. In this process, a large amount of molten salt chlorination waste slag generated annually needs to be comprehensively utilized for resource recovery. The magnesium removal process requires precise pH adjustment of the wastewater, including the magnesium removal brine. Therefore, developing a pH adjustment tank capable of precisely regulating the acidity and alkalinity of wastewater is of great significance for improving wastewater treatment efficiency and achieving compliant discharge.

[0004] Existing pH adjustment devices typically suffer from problems such as uneven mixing, low reaction efficiency, the formation of dead zones, and poor aeration, making it difficult to meet the requirements of high-precision pH control. Therefore, there is an urgent need for a high-efficiency treatment device with a reasonable structure that can achieve thorough mixing and precise pH adjustment of wastewater. Utility Model Content

[0005] In view of this, a pH adjustment tank is proposed, which can at least solve the problems of uneven mixing and low efficiency of existing pH adjustment methods.

[0006] This invention proposes a pH adjustment tank comprising: a rectangular box, a baffle plate assembly, and an aeration system. The rectangular box forms a treatment chamber, and a wastewater outlet and a sludge outlet communicating with the treatment chamber are provided on the rectangular box. The baffle plate assembly includes multiple first baffles and second baffles vertically fixed to the bottom wall of the rectangular box and spaced apart along a first direction. One end of each of the first and second baffles is installed on different side walls of the rectangular box, forming a continuous S-shaped baffle channel together with the side walls of the rectangular box. The aeration system includes an aeration pipe horizontally positioned at the bottom of the S-shaped baffle channel. Multiple first aeration holes and multiple second aeration holes are alternately formed on both sides of the aeration pipe wall. The axes of the first and second aeration holes are arranged radially along the aeration pipe and inclined downwards at a predetermined angle relative to the horizontal direction, preferably 45°.

[0007] In some embodiments, the aeration system further includes an air supply pipe, one end of which is connected to the aeration pipe and the other end of which is connected to the air outlet of the blower.

[0008] In some embodiments, multiple gas delivery pipes are provided, and the multiple gas delivery pipes are evenly arranged above the aeration pipe.

[0009] In some embodiments, a pedestrian walkway is also installed on the inner periphery of the side wall of the rectangular box.

[0010] In some embodiments, the pH adjustment tank includes a wastewater inlet pipe for feeding wastewater into a rectangular tank.

[0011] In some embodiments, the pH adjustment tank further includes a hydrochloric acid inlet pipe for feeding hydrochloric acid into the rectangular box.

[0012] In some embodiments, the pH adjustment tank further includes an alkali inlet pipe for delivering alkali solution into the rectangular box.

[0013] In some embodiments, the pH adjustment tank further includes a first pH meter and a second pH meter, which are respectively located on the side away from the wastewater outlet and the side close to the wastewater outlet.

[0014] In some embodiments, an overflow port is also provided on the upper part of the rectangular box.

[0015] In some embodiments, the pH adjustment tank further includes a rain shelter disposed above the rectangular tank.

[0016] The beneficial effects of this invention are as follows: The pH adjustment tank proposed in this invention, by setting up a baffle assembly forming an S-shaped channel inside a rectangular box, can extend the water flow path and promote full reaction. The bottom aeration pipe adopts a design with alternating aeration holes at a downward inclination of 45° on both sides, which achieves efficient mixing and swirling agitation while utilizing the backlash force of the airflow for self-cleaning and anti-clogging, ultimately achieving the effects of rapid and uniform pH adjustment, stable system operation, and easy maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front perspective view of a pH adjustment tank provided in one embodiment of the present invention; Figure 2 Right perspective view of a pH adjustment tank provided in one embodiment of the present invention; Figure 3 A top view of a pH adjustment tank provided in one embodiment of the present invention; Figure 4 for Figure 3 A partial schematic diagram of the enlarged view at point B in the middle; Figure 5 for Figure 3 Sectional view along the AA direction.

[0019] Explanation of reference numerals in the attached figures: 1. Baffle assembly; 101. First baffle; 102. Second baffle; 2. Walkway; 3. Canopy; 4. Aeration pipe; 401. First aeration hole; 402. Second aeration hole; 5. Wastewater inlet pipe; 6. Hydrochloric acid inlet pipe; 7. Alkali inlet pipe; 8. First pH meter; 9. Second pH meter; 10. Overflow outlet; 11. Wastewater outlet; 12. Sewage outlet; 13. Rectangular box; 14. Gas transmission pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to specific examples and accompanying drawings.

[0021] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0022] like Figures 1 to 3 As shown, this utility model proposes a pH adjustment tank comprising a rectangular box 13, a baffle plate assembly 1, and an aeration system. The rectangular box 13 can be composed of five titanium-steel composite plates, providing wear and corrosion resistance. The rectangular box 13 forms a treatment chamber inside, and is equipped with a wastewater outlet 11 and a sewage outlet 12 communicating with the treatment chamber. The wastewater outlet 11 and sewage outlet 12 are located at the bottom of the treatment chamber. The wastewater outlet 11 is used to transport the pH-adjusted wastewater (such as magnesium-free brine) to subsequent processes, while the sewage outlet 12 is used to remove accumulated sediment and particles from the bottom of the rectangular box 13 during cleaning and maintenance. The baffle assembly 1 includes multiple first baffles 101 and second baffles 102, which are vertically fixed to the bottom wall of the rectangular box 13 and spaced apart along a first direction (the direction of water flow). One end of each of the first baffles 101 and second baffles 102 is installed on different side walls of the rectangular box 13, forming a continuous S-shaped baffle channel together with the side walls of the rectangular box 13. This forces the fluid to flow along an S-shaped curved path instead of passing through the pool in a straight line, significantly increasing the wastewater flow time and ensuring that the wastewater reacts fully with the added pH adjuster. The aeration system includes a horizontal aeration pipe 4 laid at the bottom of the S-shaped baffle channel. Multiple first aeration holes 401 and multiple second aeration holes 402 are alternately opened on both sides of the aeration pipe 4. The axes of the first aeration holes 401 and the second aeration holes 402 are arranged radially along the aeration pipe and inclined downward at a predetermined angle θ (e.g., 45°) relative to the horizontal direction, causing two opposing rotating water flows (vortexes) to be generated at the bottom of the pool. Figure 4 and Figure 5 (As shown). These swirling currents diffuse upwards, which is beneficial for uniform aeration during the reaction and reduces the accumulation of particulate matter such as silt in the wastewater that can clog the aeration pipes 4. They can strongly and uniformly stir the water in the entire S-shaped channel, replacing the traditional mechanical agitator.

[0023] This utility model's pH adjustment tank utilizes a titanium-steel composite plate casing to ensure wear and corrosion resistance. The internal baffle assembly 1 forms an S-shaped baffle channel to extend the water flow path, prevent short circuits, and promote full reaction. The bottom aeration pipe 4 employs a double-sided downward 45° alternating aeration hole design, achieving efficient mixing and swirling agitation while utilizing airflow backlash for self-cleaning and anti-clogging, ultimately achieving rapid and uniform pH adjustment, stable system operation, and easy maintenance.

[0024] In some embodiments, the aeration system further comprises a gas transmission pipeline 14, one end of the gas transmission pipeline 14 is in communication with the aeration pipeline 4, and the other end is connected to an air outlet of a fan (not shown in the figure), so as to provide a continuous and stable air source for the aeration pipeline 4, ensure that the aeration holes can produce a uniform and strong swirling stirring effect, thereby improving the mixing efficiency of the pH regulator and the wastewater, while maintaining sufficient air flow pressure required for the aeration self-cleaning function, and ensuring long-term stable operation of the system.

[0025] In some embodiments, as shown in Figure 1 and Figure 3 , there are a plurality of gas transmission pipelines 14, and the plurality of gas transmission pipelines 14 are uniformly arranged above the aeration pipeline 4, so as to realize distributed supply of air flow, ensure uniform pressure along the full length of the aeration pipeline, make all aeration holes outlet uniformly, thereby eliminating aeration dead zones, enhancing the stirring and mixing effect of the whole tank, and improving the stability and reliability of the system operation.

[0026] In some embodiments, as shown in Figure 2 and Figure 3 , a maintenance walkway 2 is further installed on the inner periphery of the four side walls of the rectangular tank body 13, which is used for operation personnel to inspect the operation of the pH regulating tank and carry out maintenance. The maintenance walkway 2 may be in a shape of a "mouth", and the maintenance walkway 2 may be arranged along the four inner side walls of the rectangular tank body 13 at the upper part of the rectangular tank body 13.

[0027] In some embodiments, as shown in Figure 2 and Figure 3 , the pH regulating tank further comprises a wastewater feeding pipe 5 for feeding wastewater into the rectangular tank body 13, and after the upper end of the wastewater feeding pipe 5 is flange-connected to a wastewater (e.g., magnesium-removed brine) pipeline from the previous process, the wastewater is fed into the rectangular tank body 13.

[0028] In some embodiments, as shown in Figure 3 , the pH regulating tank further comprises a hydrochloric acid feeding pipe 6 for feeding hydrochloric acid into the rectangular tank body 13. After the upper end of the hydrochloric acid feeding pipe 6 is flange-connected to the supplied hydrochloric acid pipeline, the hydrochloric acid is fed into the rectangular tank body 13.

[0029] In some embodiments, as shown in Figure 3 , the pH regulating tank further comprises an alkali liquor feeding pipe 7 for feeding alkali liquor into the rectangular tank body 13. After the alkali liquor feeding pipe 7 is flange-connected to the supplied alkali liquor pipeline, the alkali liquor is fed into the rectangular tank body 13.

[0030] In some embodiments, as shown in Figure 3As shown, the pH adjustment tank also includes a first pH meter 8 and a second pH meter 9, which are respectively located on the side away from the wastewater outlet 11 and the side closer to the wastewater outlet 11. The first pH meter 8 is useful for detecting the pH value of the wastewater after adding a pH adjuster (hydrochloric acid or alkali), comparing it with the pH value required by the process, and thus determining the amount of pH adjuster to be added subsequently. The second pH meter 9 is useful for detecting the pH value of the wastewater after adding the pH adjuster, and again comparing it with the pH value required by the process, thus determining the amount of alkali solution to be added subsequently, achieving precise control of the pH value of the magnesium removal brine. In some embodiments, after the magnesium removal brine is added, hydrochloric acid is added in a slight excess for adjustment. When the magnesium removal brine flows to the first pH meter 8, the first pH test is performed, and a certain amount of alkali solution is added for neutralization based on the pH value. When the magnesium-removed brine flows forward to the second pH meter 9, a second pH test is performed. If the pH value is qualified, the magnesium-removed brine is sent away through the wastewater outlet 11. If the pH value is too low, the amount of alkali added is increased according to the pH value. If the pH value is too high, the amount of alkali added is reduced according to the pH value, thus achieving continuous and precise adjustment.

[0031] In some embodiments, such as Figure 1 As shown, an overflow port 10 is also provided at the upper part of the treatment chamber. When the liquid level in the rectangular box 13 exceeds the height of the overflow port 10, the wastewater is sent away to ensure that the treatment chamber does not exceed its weight limit.

[0032] In some embodiments, such as Figure 1 As shown, the pH adjustment tank also includes a rain shelter 3 installed above the rectangular box 13, which helps to prevent rainwater and debris from falling into the rectangular box 13, thus avoiding affecting the accuracy of the pH value and contaminating the treated wastewater.

[0033] The assembly method of the pH adjustment tank according to one embodiment of this utility model includes the following steps: Step 1: Calculate the volume of the rectangular box 13 (L×W×H=3.5×3×1.8~7.5×6×3.5m) according to the process requirements, and design the size and quantity of the baffles (horizontal interval between the first baffle 101 and the second baffle 102 300~700mm, length 2.5~5.5m). Step 2: Based on the size of the rectangular box 13, design the size of the canopy 3 (L×W=4.1×3.6~8.1×6.6m), design the width of the pedestrian walkway 2 (800~1600mm), and design the wastewater outlet 11 and the sewage outlet 12 at the bottom of the rectangular box 13, and design the overflow outlet 10 at the top of the rectangular box 13. Step 3: Based on process requirements and compressed air characteristics, calculate the size of the aeration pipe 4. On the horizontal section of the aeration pipe 4 parallel to the first baffle plate 101 and the second baffle plate 102, install the first aeration hole 401 and the second aeration hole 402 at intervals (300~600mm), and lay them within the S-shaped baffle channel formed between the first baffle plate 101 and the second baffle plate 102. Then, evenly connect 2~8 wastewater inlet pipes 5 to the aeration pipe 4. Step 4: Install wastewater inlet pipe 5, hydrochloric acid inlet pipe 6, and alkali inlet pipe 7 in rectangular box 13 respectively; Step 5: Install a first pH meter 8 and a second pH meter 9 on the side away from the wastewater outlet 11 and the side closer to the wastewater outlet 11, respectively.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pH adjustment tank, characterized in that, include: A rectangular box (13) is provided with a processing cavity inside the rectangular box (13) and a wastewater outlet (11) and a sewage outlet (12) communicating with the processing cavity. The baffle assembly (1) includes a plurality of first baffles (101) and second baffles (102) that are vertically fixed to the bottom wall of the rectangular box (13) and spaced apart along the first direction. One end of the first baffle (101) and the second baffle (102) are respectively installed on different side walls of the rectangular box (13) and together with the side walls of the rectangular box (13) form a continuous S-shaped baffle channel. The aeration system includes an aeration pipe (4) horizontally disposed at the bottom of the S-shaped baffle channel. Multiple first aeration holes (401) and multiple second aeration holes (402) are alternately opened on both sides of the pipe wall of the aeration pipe (4). The axes of the first aeration holes (401) and the second aeration holes (402) are arranged radially along the aeration pipe and inclined downward at a predetermined angle relative to the horizontal direction.

2. The pH adjustment tank according to claim 1, characterized in that, The aeration system also includes an air supply pipe (14), one end of which is connected to the aeration pipe (4), and the other end is connected to the air outlet of the blower.

3. The pH adjustment tank according to claim 2, characterized in that, Multiple gas delivery pipes (14) are provided, and the multiple gas delivery pipes (14) are evenly arranged above the aeration pipe (4).

4. The pH adjustment tank according to claim 1, characterized in that, The rectangular box (13) is also equipped with a pedestrian walkway (2) on the inner periphery of its side wall.

5. The pH adjustment tank according to claim 1, characterized in that, It also includes a wastewater inlet pipe (5) for feeding wastewater into the rectangular box (13).

6. The pH adjustment tank according to claim 1, characterized in that, It also includes a hydrochloric acid inlet tube (6) for feeding hydrochloric acid into the rectangular box (13).

7. The pH adjustment tank according to claim 1, characterized in that, It also includes an alkali inlet pipe (7) for delivering alkali solution into the rectangular box (13).

8. The pH adjustment tank according to claim 1, characterized in that, It also includes a first pH meter (8) and a second pH meter (9), the first pH meter (8) and the second pH meter (9) being respectively located on the side away from the wastewater outlet (11) and the side close to the wastewater outlet (11).

9. The pH adjustment tank according to claim 1, characterized in that, An overflow port (10) is also provided on the upper part of the rectangular box (13).

10. The pH adjustment tank according to claim 1, characterized in that, It also includes a rain shelter (3) set above the rectangular box (13).

Images