Variable-capacity high-alkalinity wastewater treatment device

Abstract

The utility model provides a variable-capacity high-alkalinity wastewater treatment device, and belongs to the technical field of environmental governance. The device comprises a box body with a telescopic middle part, and is driven by a hydraulic prop to stretch; the box body top cover or the upper half box body is connected with a gas release pipe, the gas release pipe is provided with a gas release valve, the lower half box body or the box body base is provided with a waste water inlet, a CO2 gas inlet pipe and a purified water outlet, a waste water inlet valve is arranged at the waste water inlet, a CO2 gas inlet valve is arranged on the CO2 gas inlet pipe, and a purified water outlet valve is arranged at the purified water outlet. A CO2 aerator is arranged at the inner end of the CO2 inlet pipe, and the outer end of the CO2 inlet pipe is sequentially connected with the air temperature type vaporizer and the heat insulation LCO2 Dewar tank. According to the utility model, the volume and the internal capacity can be adjusted according to the actual sewage treatment capacity, so that the sewage treatment efficiency and the CO2 utilization rate are improved; furthermore, the volume of the device can be compressed when the device is not used, so that transportation and storage are facilitated; the device is particularly suitable for neutralizing treatment of high-alkalinity wastewater in the field of constructional engineering.

Description

Technical Field

[0001] This utility model belongs to the field of environmental governance technology, specifically a variable-capacity high-alkalinity wastewater treatment device. Background Technology

[0002] Wastewater is inevitably generated during engineering construction, and its pH value is an important indicator. According to the National Surface Water Environmental Quality Standard (GB3838-2002), the pH value of Class I to V water should be between 6 and 9.

[0003] During construction, wastewater is primarily alkaline due to processes such as cement pouring. Currently, treatment methods for alkaline wastewater from construction mainly include flocculation, chemical precipitation, and acid-base neutralization, with acid-base neutralization being the most common. This method involves adding mineral acids such as sulfuric acid or hydrochloric acid to neutralize the wastewater and bring its pH value to the required level. However, this method is not only costly, but the use of hydrochloric acid to neutralize alkaline wastewater also generates large amounts of sodium chloride that cannot be contained in natural rivers. Simultaneously, building structures and processing equipment are susceptible to corrosion from acidic vapors. Similarly, sulfuric acid leads to the formation of sulfates, which also corrode concrete structures. Furthermore, both hydrochloric acid and sulfuric acid are classified as hazardous chemicals by national regulations, posing challenges in transportation and procurement.

[0004] CO2 is a colorless and odorless gas at room temperature and pressure. It can be liquefied by applying pressure at room temperature and is characterized by its safety, non-toxicity, and ease of use. When dissolved in water, it forms carbonic acid, which, as a weak acid, can ionize in water to produce H+. + This achieves the goal of lowering the pH value of the water.

[0005] Therefore, the method of neutralizing industrial wastewater using CO2 has gradually gained attention. Currently, the technology for treating wastewater with CO2 in industrial production and other fields has become increasingly mature, but its application in engineering construction is rare. This is mainly because wastewater generated from engineering construction has characteristics such as uneven effluent volume, large flow variations, and unstable effluent quality. Therefore, it is necessary to design a new compressible high-alkalinity wastewater treatment device. Summary of the Invention

[0006] This utility model aims to address the technical deficiencies of existing technologies by providing a variable-capacity high-alkalinity wastewater treatment device. This addresses the technical problems that current CO2 neutralization treatment equipment for alkaline wastewater is ill-suited to the characteristics of alkaline wastewater in the construction industry, such as uneven water volume, large flow variations, and unstable effluent quality.

[0007] Another technical problem that this invention aims to solve is that CO2 neutralization treatment equipment for alkaline wastewater is bulky and inconvenient to move and arrange flexibly.

[0008] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0009] A variable-volume high-alkalinity wastewater treatment device includes a tank, a vent pipe, a vent valve, a wastewater inlet valve, a wastewater inlet, an insulated LCO2 Dewar flask, an ambient temperature vaporizer, a CO2 inlet valve, a CO2 inlet pipe, a CO2 aerator, a purified water outlet, and a purified water outlet valve. The tank includes an upper half, a lower half, and a retractable portion connecting the upper and lower half. A top cover is connected to the upper half, and the lower half is connected to a base. A connection is made between the top cover and the base. It has several hydraulic supports; a vent pipe is connected to the top cover of the box or the upper half of the box, and a vent valve is provided on the vent pipe; a wastewater inlet, a CO2 inlet pipe, and a clean water outlet are provided on the lower half of the box or the base of the box; a wastewater inlet valve is provided at the wastewater inlet; a CO2 inlet valve is provided on the CO2 inlet pipe; a clean water outlet valve is provided at the clean water outlet; a CO2 aerator is provided at the inner end of the CO2 inlet pipe; and the outer end of the CO2 inlet pipe is connected in sequence to an ambient temperature vaporizer and an insulated LCO2 Dewar tank.

[0010] Preferably, the system also includes a pH sensor, a sensor display screen, a pressure relief control line, a CO2 intake control line, a hydraulic control line, a drainage control line, and a control terminal. The pH sensor is housed within the enclosure and connected to the sensor display screen outside the enclosure via a data cable. The pressure relief control line is connected to a vent valve, the CO2 intake control line is connected to a CO2 intake valve, the hydraulic control line is connected to the hydraulic pump of the hydraulic support, and the drainage control line is connected to a purified water drain valve. The pressure relief control line, CO2 intake control line, hydraulic control line, and drainage control line are all connected to the control terminal.

[0011] Preferably, the upper half of the box is a regular square prism structure without a bottom surface, the telescopic part is a regular square prism structure without both top and bottom surfaces, and the lower half of the box is a regular square prism structure without a top surface.

[0012] Preferably, the top cover of the box is a square steel structure.

[0013] Preferably, the vent valve is an electric knife gate valve.

[0014] Preferably, the vent pipe is a liquid ammonia hose.

[0015] Preferably, the hydraulic prop is an external injection type single hydraulic prop.

[0016] Preferably, the CO2 intake valve is a two-way solenoid valve.

[0017] Preferably, both the wastewater inlet valve and the clean water outlet valve are pilot-operated solenoid valves.

[0018] As a preferred option, the CO2 aerator is a jet aerator.

[0019] This invention provides a variable-capacity high-alkalinity wastewater treatment device. The power unit of this invention is an electric motor. Due to its small size and light weight, the electric motor has advantages such as low inertia, fast response speed, and rapid starting, braking and reversing. It is also easy to implement overload protection and has good safety.

[0020] The power unit of this utility model also includes a hydraulic pump and a vacuum pump. The motor is connected to the vacuum pump and the hydraulic pump. The vacuum pump is connected to the CO2 inlet pipe, and the hydraulic pump is connected to the hydraulic support.

[0021] In this invention, the CO2 inlet pipe is connected to an ambient air vaporizer; the ambient air vaporizer is connected to an adiabatic liquid carbon dioxide (LCO2) Dewar flask; the liquid CO2 in the adiabatic LCO2 Dewar flask is converted into gaseous CO2 by the ambient air vaporizer, and then enters the wastewater treatment device tank through the CO2 inlet pipe. The wastewater to be treated is pumped into the device's wastewater inlet by a booster pump, where it undergoes a neutralization reaction with CO2 to achieve the required pH level before being discharged through the clean water outlet.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention can adjust its volume and internal capacity according to the actual wastewater treatment volume in the project, improving wastewater treatment efficiency and CO2 utilization. It can handle multiple situations with a single treatment unit, thus saving costs. When not in use, this invention can compress its volume for easy transportation and storage. The carbon dioxide treatment method used in this invention does not produce secondary pollution, and the transportation and purchase of carbon dioxide are simpler and cheaper. This invention has an integrated structure, is easy to install and operate, and is less restricted by wastewater volume or terrain. It can be used in various sites and can be reused in different construction sections. It can also serve as an efficient emergency treatment method when wastewater quality changes beyond expectations. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model viewed from the main viewpoint when the retractable part is in a stretched state.

[0025] Figure 2 This is a schematic diagram of the partial structure of this utility model viewed from a top-down perspective;

[0026] Figure 3 This is a schematic diagram of the partial structure of this utility model viewed from the main viewpoint when the retractable part is in a compressed state.

[0027] In the diagram: 1. Vent pipe; 2. Vent valve; 3. Top cover of the tank; 4. Hydraulic support; 5. Telescopic part; 6. Base of the tank; 7. Wastewater inlet valve; 8. Wastewater inlet; 9. Insulated LCO2 Dewar tank; 10. Ambient vaporizer; 11. CO2 inlet valve; 12. CO2 inlet pipe; 13. CO2 aerator; 14. Clean water drain outlet; 15. Clean water drain valve; 16. pH sensor; 17. Sensor display screen; 18. Pressure relief control line; 19. CO2 inlet control line; 20. Hydraulic control line; 21. Drainage control line; 22. Control terminal. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in detail below. To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments. The approximate language used in the following embodiments can be used for quantitative descriptions, indicating that a certain degree of variation in quantity is permissible without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which this utility model pertains.

[0029] Example 1

[0030] A variable-capacity high-alkalinity wastewater treatment device includes: an upper chamber, a telescopic section 5, a lower chamber, and a control system.

[0031] The upper half of the enclosure is a regular square prism structure lacking a bottom surface, with a side length of 1.5m. Its upper bottom surface is connected to the top cover 3 of the enclosure. The top cover 3 is a square high-strength steel structure with a side length of 1.7m. The top cover 3 is connected to four hydraulic supports 4 and a telescopic section 5. A vent valve 2 and a vent pipe 1 are installed sequentially on it. The vent valve 2 is installed on the top of the top cover 3, and the vent pipe 1 is connected to the vent valve 2. The vent valve 2 is connected to the control terminal 22 via a pressure relief control line 18. The vent valve 2 is an electric knife gate valve with an inner diameter of 200mm; the vent pipe 1 is a liquid ammonia hose with an inner diameter of 200mm and a length between 3 and 4m.

[0032] The retractable section 5 is a regular square prism structure lacking top and bottom surfaces, made of high-strength steel. Its bottom side length is 1.2m, its height is 2.5m in the fully extended state, and 1.5m in the compressed state. The retractable section 5 is connected to the top cover 3 and the base 6 of the enclosure. During operation, its extension / retraction state can be changed via the hydraulic support 4. The hydraulic support 4 is an externally injected single hydraulic support, its top cover connected to the top cover 3 of the enclosure, and its base connected to the base 6 of the enclosure.

[0033] It should be noted that during operation, changes in internal pressure may cause deformation of the expandable part 5.

[0034] The lower half of the tank is a regular square prism structure lacking an upper bottom surface, with a bottom side length of 1.3m, and its lower bottom surface is connected to the tank base 6. The tank base 6 is a square high-strength steel structure with a side length of 1.7m. Inside the lower half of the tank, the following components are installed sequentially: wastewater inlet valve 7, wastewater inlet 8, CO2 inlet valve 11, CO2 inlet pipe 12, CO2 aerator 13, clean water outlet 14, and clean water outlet valve 15. When the device is running, the wastewater inlet valve 7 is opened, and the highly alkaline wastewater to be treated enters the retractable section 5 through the wastewater inlet 8. CO2 gas enters the retractable section 5 through the CO2 aerator 13 and mixes with the highly alkaline wastewater to be treated. After a neutralization reaction, the pH value of the water is lower than 9, and then it is discharged through the clean water outlet 14. The CO2 inlet valve 11 is a two-way solenoid valve, the wastewater inlet valve 7 is a pilot-operated solenoid valve, the CO2 aerator 13 is a jet aerator, and the purified water drain valve 15 is a pilot-operated solenoid valve. The CO2 aerator 13 is connected to the CO2 inlet pipe 12, which in turn is connected to the CO2 inlet valve 11. The CO2 inlet valve 11 is connected to the ambient air vaporizer 10 outside the tank via a liquid ammonia hose. The ambient air vaporizer 10 is connected to the insulated LCO2 Dewar tank 9 via a liquid ammonia hose.

[0035] The control system includes a pH sensor 16, a sensor display screen 17, a pressure relief control line 18, a CO2 intake control line 19, a hydraulic control line 20, a drainage control line 21, and a control terminal 22. The pH sensor 16 is attached to the retractable part 5 and connected to the sensor display screen 17 via a data cable. The pressure relief control line 18 is connected to the vent valve 2, the CO2 intake control line 19 is connected to the CO2 intake valve 11, the hydraulic control line 20 is connected to the hydraulic pump at the bottom of the hydraulic support 4, and the drainage control line 21 is connected to the purified water drain valve 15. The pressure relief control line 18, the CO2 intake control line 19, the hydraulic control line 20, and the drainage control line 21 are all connected to the control terminal 22.

[0036] In use, position and fix the device near the wastewater treatment tank, connect the power supply, connect the ambient temperature vaporizer 10 to the CO2 inlet valve 11 via a liquid ammonia hose, ensure there is sufficient liquid carbon dioxide in the insulated LCO2 Dewar tank 9, and connect the booster pump or water pump to the wastewater inlet valve 7 as needed. Use the control terminal 22 to confirm the equipment status, open the vent valve 2, and adjust the device volume via the hydraulic support 4. After the volume adjustment is complete, open the CO2 inlet valve 11, the wastewater inlet valve 7, and the clean water outlet valve 15, close the vent valve 2, and start the wastewater treatment process via the control terminal 22.

[0037] It should be noted that the above valves are connected to the control terminal 22, and the above process is controlled by the control terminal 22 without manual operation.

[0038] During operation, the highly alkaline wastewater to be treated flows into the wastewater inlet valve 7, which is connected to the wastewater inlet 8. Wastewater is injected into the retractable section 5 through the wastewater inlet 8. The control terminal 22 adjusts the CO2 gas flow rate in the CO2 inlet valve 11, allowing CO2 gas to be introduced into the retractable section 5 through the CO2 inlet pipe 12. The CO2 gas mixes with the highly alkaline wastewater in the retractable section 5, undergoing a neutralization reaction. A pH sensor 16 is installed inside the retractable section 5. Once the pH value of the wastewater is detected to be below 9, it is discharged through the purified water outlet 14.

[0039] In the actual implementation process, the outlet of the vent pipe 1 should be fixed to the ground and avoid the direction where there are many people.

[0040] It should be noted that when the device is performing wastewater treatment operations, the vent valve 2 is in the closed state. When the device is performing volume change operations, the vent valve 2 is opened, while the wastewater inlet valve 7, CO2 inlet valve 11, and clean water outlet valve 15 are in the closed state.

[0041] In the specific implementation process, a hydraulic pump is located at the bottom of the hydraulic support 4.

[0042] It should be noted that the hydraulic pump is the power source for the hydraulic support 4, and it is connected to the control terminal 22 via the hydraulic control line 20. The control terminal 22 can adjust the hydraulic pump pressure, change the extension and retraction state of the hydraulic support 4, drive the retractable part 5, and thus change the volume of the device.

[0043] In practice, the control terminal 22 and the sensor display screen 17 are installed separately outside the cabinet in the form of a control cabinet.

[0044] It should be noted that the control terminal 22 integrates a wastewater flow and water quality prediction system and an automated control system. When treating highly alkaline wastewater, the control terminal 22 can adjust the CO2 gas flow and tank volume through the pressure relief control line 18, CO2 inlet control line 19, hydraulic control line 20 and drainage control line 21 to improve CO2 utilization and increase wastewater treatment efficiency, depending on the water quality and quantity.

[0045] It should be noted that the CO2 gas flow rate can be adjusted in real time during wastewater treatment via control terminal 22. However, adjusting the tank volume requires pausing wastewater treatment operations, closing the wastewater inlet valve 7, CO2 inlet valve 11, and purified water drain valve 15, and opening the vent valve 2. After completing the tank volume adjustment, open the wastewater inlet valve 7, CO2 inlet valve 11, and purified water drain valve 15, and close the vent valve 2 to continue wastewater treatment operations.

[0046] During implementation, the device should be placed on a flat surface as much as possible to avoid damage caused by uneven pressure.

[0047] Example 2

[0048] Based on Example 1, this example provides a function to compress the device to a minimum for transport. The main structures involved in realizing this function include a vent pipe 1, a vent valve 2, a hydraulic support 4, a telescopic part 5, a wastewater inlet valve 7, a CO2 inlet valve 11, a clean water drain valve 15, a pressure relief control line 18, a hydraulic control line 20, a drain control line 21, and a control terminal 22.

[0049] When the device needs to be transported, open the vent valve 2 via control terminal 22, close the wastewater inlet valve 7, CO2 inlet valve 11, and clean water drain valve 15, and disconnect and remove the pipes connected to the device. Reduce the hydraulic pump pressure via control terminal 22 to retract the hydraulic support 4, causing the telescopic part 5 to compress to its minimum. The vent pipe 1 connected to vent valve 2 should be unsecured and disconnected after compression. The pipes connected to wastewater inlet valve 7, CO2 inlet valve 11, and clean water drain valve 15 should be removed before the compression process begins.

[0050] In the specific implementation process, the bottom side length of the upper half of the box is greater than that of the bottom side length of the lower half of the box. Under the compressed state, the upper half of the box will enclose the lower half of the box to protect components such as the wastewater inlet valve 7, the CO2 inlet valve 11, and the clean water drain valve 15.

[0051] It should be noted that when transporting the device, external equipment such as the insulated LCO2 Dewar 9, the ambient temperature vaporizer 10, and the control cabinet of the integrated sensor display screen 17 and control terminal 22 need to be disassembled and transported separately.

[0052] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of this utility model application should be included within the protection scope of this utility model.

Claims

1. A variable-volume high-alkalinity wastewater treatment device, characterized in that, The system includes a housing, a vent pipe (1), a vent valve (2), a wastewater inlet valve (7), a wastewater inlet (8), an insulated LCO2 Dewar jar (9), an ambient temperature vaporizer (10), a CO2 inlet valve (11), a CO2 inlet pipe (12), a CO2 aerator (13), a clean water outlet (14), and a clean water outlet valve (15). The housing includes an upper housing, a lower housing, and a retractable section (5) connecting the upper and lower housings. A housing top cover (3) is connected to the upper housing, and the lower housing is connected to a housing base (6). Several hydraulic supports (4) are connected between the housing top cover (3) and the housing base (6). (3) A vent pipe (1) is connected to the upper half of the box. A vent valve (2) is provided on the vent pipe (1). A wastewater inlet (8), a CO2 inlet pipe (12), and a clean water outlet (14) are provided on the lower half of the box or on the box base (6). A wastewater inlet valve (7) is provided at the wastewater inlet (8). A CO2 inlet valve (11) is provided on the CO2 inlet pipe (12). A clean water outlet valve (15) is provided at the clean water outlet (14). A CO2 aerator (13) is provided at the inner end of the CO2 inlet pipe (12). The outer end of the CO2 inlet pipe (12) is connected to an ambient temperature vaporizer (10) and an insulated LCO2 Dewar jar (9) in sequence.

2. The variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, It also includes a pH sensor (16), a sensor display screen (17), a pressure relief control line (18), a CO2 intake control line (19), a hydraulic control line (20), a drainage control line (21), and a control terminal (22). The pH sensor (16) is installed in the housing and is connected to the sensor display screen (17) outside the housing via a data cable. The pressure relief control line (18) is connected to the vent valve (2), the CO2 intake control line (19) is connected to the CO2 intake valve (11), the hydraulic control line (20) is connected to the hydraulic pump of the hydraulic support (4), the drainage control line (21) is connected to the purified water drain valve (15), and the pressure relief control line (18), CO2 intake control line (19), hydraulic control line (20), and drainage control line (21) are connected to the control terminal (22).

3. The variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, The upper half of the box is a regular square prism structure without a bottom surface, the telescopic part (5) is a regular square prism structure without both top and bottom surfaces, and the lower half of the box is a regular square prism structure without a top surface.

4. The variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, The top cover (3) of the box is a square steel structure.

5. The variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, The vent valve (2) is an electric knife gate valve.

6. The variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, The vent pipe (1) is a liquid ammonia hose.

7. The variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, The hydraulic prop (4) is an external injection type single hydraulic prop.

8. The variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, The CO2 intake valve (11) is a two-way solenoid valve.

9. A variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, Both the wastewater inlet valve (7) and the clean water outlet valve (15) are pilot-operated solenoid valves.

10. A variable-volume high-alkalinity wastewater treatment device according to claim 1, characterized in that, The CO2 aerator (13) is a jet aerator.

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