Variable-capacity high-alkalinity wastewater treatment device

Abstract

The invention provides a variable-capacity high-alkalinity wastewater treatment device, and belongs to the technical field of environmental treatment. 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. The volume and the internal capacity can be adjusted according to the actual sewage treatment capacity, and 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 method is especially suitable for neutralization treatment of high-alkalinity wastewater in the field of constructional engineering.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental governance, and specifically relates to a variable volume high alkaline wastewater treatment device. Background Art

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

[0003] During the construction process, due to cement pouring and other processes, the discharged wastewater is mainly alkaline. At present, the main treatment processes for alkaline wastewater during construction include flocculation, chemical precipitation and acid-base neutralization, among which acid-base neutralization is the most common. This method neutralizes the wastewater by adding mineral acids such as sulfuric acid or hydrochloric acid to meet the requirements. However, this method is not only costly, but also uses hydrochloric acid to neutralize alkaline wastewater, which will produce a large amount of sodium chloride that cannot be accommodated in natural rivers. At the same time, building structures and processing equipment will be corroded by acidic steam. Similarly, sulfuric acid will lead to the formation of sulfates, which will also corrode concrete buildings. In addition, hydrochloric acid and sulfuric acid are both hazardous chemicals specified by the state, and they face certain difficulties in transportation and procurement.

[0004] CO2 is a colorless and odorless gas at room temperature and pressure. It can be liquefied under pressure at room temperature. It is safe, non-toxic and easy to use. When it dissolves in water, it will produce carbonic acid. Carbonic acid, as a weak acid, can ionize H in water. + , thereby achieving the purpose of lowering the pH value of the water body.

[0005] Therefore, the method of using CO2 to neutralize industrial wastewater has gradually attracted attention. At present, in the fields of industrial production, the process of using CO2 to treat wastewater has gradually matured, but it is rarely used in engineering construction. This is mainly because the wastewater generated by engineering construction has the characteristics of uneven water output, large flow rate changes, and unstable water quality. Therefore, it is necessary to design a new compressible high-alkaline wastewater treatment device. Summary of the invention

[0006] The present invention aims to provide a variable volume high alkaline wastewater treatment device to address the technical defects of the prior art, so as to solve the technical problems that the current CO2 neutralization treatment equipment used for alkaline wastewater is difficult to adapt to the characteristics of alkaline wastewater in the construction field, such as uneven water volume, large flow rate changes, and unstable effluent water quality.

[0007] Another technical problem to be solved by the present invention is that the CO2 neutralization treatment equipment for alkaline wastewater is bulky and difficult to transfer and flexibly arrange.

[0008] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0009] A variable volume high alkaline wastewater treatment device, comprising a box, a vent pipe, a vent valve, a wastewater inlet valve, a wastewater inlet, an insulated LCO2 Dewar tank, an air temperature vaporizer, a CO2 inlet valve, a CO2 inlet pipe, a CO2 aerator, a clean water drain outlet, and a clean water drain valve; the box comprises an upper box, a lower box, and a retractable part connected between the upper box and the lower box, a box top cover is connected to the upper box, the lower box is connected to the box base, and a retractable part is connected between the box top cover and the box base There are several hydraulic struts; a deflation pipe is connected to the top cover of the box body or the upper half of the box body, and a deflation valve is arranged on the deflation pipe; a wastewater inlet, a CO2 inlet pipe, and a clean water outlet are arranged on the lower half of the box body or the base of the box body; a wastewater inlet valve is arranged at the wastewater inlet, a CO2 inlet valve is arranged on the CO2 inlet pipe, a clean water outlet is arranged at the clean 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 connected to the air-temperature vaporizer and the insulated LCO2 Dewar tank in sequence.

[0010] Preferably, it 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, wherein the pH sensor is arranged in the box, and the pH sensor is connected to the sensor display screen outside the box through a data line; the pressure relief control line is connected to the air relief valve, the CO2 intake control line is connected to the CO2 intake valve, the hydraulic control line is connected to the hydraulic pump of the hydraulic support, the drainage control line is connected to the clean water drainage valve, and the pressure relief control line, the CO2 intake control line, the hydraulic control line, and the drainage control line are connected to the control terminal.

[0011] Preferably, the upper half box is a regular quadrangular prism structure lacking a lower bottom surface, the telescopic part is a regular quadrangular prism structure lacking upper and lower bottom surfaces, and the lower half box is a regular quadrangular prism structure lacking an upper bottom surface.

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

[0013] Preferably, the air relief 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 body hydraulic prop.

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

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

[0018] Preferably, the CO2 aerator is a jet aerator.

[0019] The present invention provides a variable capacity high alkaline wastewater treatment device. The power device of the present invention is a motor, which has the advantages of small inertia, fast response speed, rapid starting, braking and reversing, etc. due to its small size and light weight, and is easy to implement overload protection and good safety.

[0020] The power device of the present invention 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 intake pipe, and the hydraulic pump is connected to the hydraulic support.

[0021] In the invention, the CO2 inlet pipe is connected to the air-temperature vaporizer; the air-temperature vaporizer is connected to the insulated liquid carbon dioxide (LCO2) dewar tank; the liquid CO2 in the insulated LCO2 dewar tank is converted into gaseous CO2 by the air-temperature vaporizer, and then enters the tank body of the wastewater treatment device through the CO2 inlet pipe. The wastewater inlet of the device is fed into the wastewater to be treated through a lifting pump, and the wastewater is neutralized with CO2 to make the pH reach the standard before being discharged through the clean water outlet.

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

[0023] The present invention can adjust its volume and internal capacity according to the actual sewage treatment volume in the project, improve the sewage treatment efficiency and CO2 utilization rate, and can deal with multiple situations with one treatment device, thereby saving costs; the present invention can compress its own volume when not performing treatment work, which is convenient for transportation and storage; the carbon dioxide treatment method used in the present invention does not produce secondary pollution, and the transportation and purchase of carbon dioxide are simpler and cheaper. The present invention is an integrated structure, easy to install and operate, and is less restricted by the amount of wastewater and terrain. It can be used in various venues and can be reused in different construction sections; it can also become an efficient emergency treatment method when the wastewater quality changes exceed expectations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention as a whole observed from a main viewing angle when the retractable portion is in a stretched state;

[0025] Figure 2 It is a structural schematic diagram of a local structure of the present invention observed from a top view;

[0026] Figure 3 is a structural schematic diagram of a local structure of the present invention observed from a main viewing angle when the retractable portion is in a compressed state;

[0027] In the figure: 1. vent pipe; 2. vent valve; 3. box top cover; 4. hydraulic support; 5. retractable part; 6. box base; 7. wastewater inlet valve; 8. wastewater inlet; 9. insulated LCO2 dewar tank; 10. air-temperature 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; 18. pressure relief control line; 19. CO2 inlet control line; 20. hydraulic control line; 21. drainage control line; 22. control terminal. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention will be described in detail below. In order to avoid too much unnecessary details, the well-known structures or functions will not be described in detail in the following examples. The approximate language used in the following examples can be used for quantitative expression, indicating that the quantity can be allowed to have a certain change without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following examples have the same meaning as those generally understood by those skilled in the art to which the present invention belongs.

[0029] Example 1

[0030] A variable volume high alkaline wastewater treatment device comprises: an upper half box, a telescopic part 5, a lower half box and a control system.

[0031] The upper half of the box is a regular quadrangular prism structure lacking a lower bottom surface, with a bottom side length of 1.5m, and its upper bottom surface is connected to the box top cover 3. The box top cover 3 is a square high-strength steel structure with a side length of 1.7m. The box top cover 3 is connected to four hydraulic pillars 4 and a retractable part 5. The air relief valve 2 and the air relief pipe 1 are installed thereon in sequence. The air relief valve 2 is installed on the top of the box top cover 3, and the air relief pipe 1 is connected to the air relief valve 2. The air relief valve 2 is connected to the control terminal 22 through the pressure relief control line 18. Among them, the air relief valve 2 is an electric knife gate valve with an inner diameter of 200mm; the air relief pipe 1 is a liquid ammonia hose with an inner diameter of 200mm and a length between 3 and 4m.

[0032] The telescopic part 5 is a regular quadrangular prism structure lacking upper and lower bottom surfaces, made of high-strength steel, with a bottom side length of 1.2 m, a height of 2.5 m in a fully extended state, and a height of 1.5 m in a compressed state. The telescopic part 5 is connected to the box top cover 3 and the box base 6. During operation, the telescopic state can be changed by the hydraulic prop 4. Among them, the hydraulic prop 4 is an external injection type single hydraulic prop, whose top cover is connected to the box top cover 3, and the base is connected to the box base 6.

[0033] It should be noted that when the device is running, changes in internal pressure may cause the retractable part 5 to deform.

[0034] The lower half of the box is a regular tetrahedral structure lacking an upper bottom surface, with a bottom side length of 1.3m, and its lower bottom surface is connected to the box base 6. The box base 6 is a square high-strength steel structure with a side length of 1.7m. The wastewater inlet valve 7, the wastewater inlet 8, the CO2 inlet valve 11, the CO2 inlet pipe 12, the CO2 aerator 13, the clean water drain 14 and the clean water drain valve 15 are installed in sequence inside the lower half of the box. When the device is running, the wastewater inlet valve 7 is opened, and the highly alkaline wastewater to be treated enters the retractable part 5 through the wastewater inlet 8. The CO2 gas enters the retractable part 5 through the CO2 aerator 13 and mixes with the highly alkaline wastewater to be treated. After the neutralization reaction, the pH value of the water body is lower than 9 and then discharged through the clean water drain 14. Among them, the CO2 intake valve 11 is a two-way solenoid valve, the wastewater inlet valve 7 is a pilot solenoid valve, the CO2 aerator 13 is a jet aerator, and the clean water drain valve 15 is a pilot solenoid valve. Among them, the CO2 aerator 13 is connected to the CO2 intake pipe 12, and the CO2 intake pipe 12 is connected to the CO2 intake valve 11. The CO2 intake valve 11 is connected to the air-temperature vaporizer 10 outside the box through a liquid ammonia hose, and the air-temperature vaporizer 10 is connected to the insulated LCO2 Dewar tank 9 through 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 line. The pressure relief control line 18 is connected to the air relief 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 clean water drainage 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 connected to the control terminal 22.

[0036] When in use, adjust the position of the device and fix it near the wastewater treatment pool, connect the power supply, connect the air-temperature vaporizer 10 to the CO2 inlet valve 11 through the liquid ammonia hose, confirm that there is enough liquid carbon dioxide in the insulated LCO2 dewar tank 9, and connect the lift pump or water pump to the wastewater inlet valve 7 as needed. Use the control terminal 22 to confirm the status of the equipment, open the air relief valve 2, and adjust the volume of the device through the hydraulic support 4. After the volume adjustment is completed, open the CO2 inlet valve 11, the wastewater inlet valve 7 and the clean water discharge valve 15, close the air relief valve 2, and start the wastewater treatment through 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] When the device is in operation, the highly alkaline wastewater to be treated flows into the wastewater inlet valve 7, which is connected to the wastewater inlet 8, and the wastewater is injected into the retractable part 5 through the wastewater inlet 8. The control terminal 22 adjusts the gas flow of CO2 in the CO2 inlet valve 11, and inputs the CO2 gas into the retractable part 5 through the CO2 inlet pipe 12. The CO2 gas mixes with the highly alkaline wastewater in the retractable part 5 to perform a neutralization reaction. A pH sensor 16 is provided in the retractable part 5, and after detecting that the pH value of the wastewater is lower than 9, it is discharged through the clean water outlet 14.

[0039] During the specific implementation process, the outlet of the vent pipe 1 should be fixed on 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 air relief valve 2 is in a closed state. When the device is performing volume change operations, the air relief valve 2 is opened, and the wastewater inlet valve 7, the CO2 inlet valve 11, and the clean water drain valve 15 are in a closed state.

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

[0042] It should be noted that the hydraulic pump is the power source of the hydraulic support 4, which is connected to the control terminal 22 through a hydraulic control line 20. The control terminal 22 can adjust the hydraulic pump pressure, change the telescopic state of the hydraulic support 4, drive the telescopic part 5, and then change the volume of the device.

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

[0044] It should be noted that the control terminal 22 is integrated with a wastewater flow and water quality prediction system and an automatic control system. When treating highly alkaline wastewater, the control terminal 22 can adjust the CO2 gas flow and the tank volume through the pressure relief control line 18, the CO2 intake control line 19, the hydraulic control line 20 and the drainage control line 21 according to different water qualities and water quantities, so as to achieve the purpose of improving the CO2 utilization rate and improving the wastewater treatment efficiency.

[0045] It should be noted that the CO2 gas flow rate can be adjusted in real time during the wastewater treatment operation through the control terminal 22, while the adjustment of the tank volume requires suspending the wastewater treatment operation, closing the wastewater inlet valve 7, the CO2 inlet valve 11, the clean water drainage valve 15, and opening the air release valve 2. After completing the tank volume adjustment, open the wastewater inlet valve 7, the CO2 inlet valve 11, the clean water drainage valve 15, and close the air release valve 2 to continue the wastewater treatment operation.

[0046] During the specific implementation process, the device should be placed on flat ground as much as possible to avoid damage to the device due to uneven pressure.

[0047] Example 2

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

[0049] When the device needs to be transported, the air release valve 2 is opened through the control terminal 22, the wastewater inlet valve 7, the CO2 inlet valve 11, and the clean water drain valve 15 are closed, and the pipes connected to the device are disconnected and removed. The hydraulic pump pressure is reduced through the control terminal 22 to shrink the hydraulic support 4, driving the retractable part 5 to be compressed to the minimum. Among them, the pipeline air release pipe 1 connected to the air release valve 2 is unfixed and disconnected after the compression is completed, and the pipes connected to the wastewater inlet valve 7, the CO2 inlet valve 11, and the 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 box is greater than the bottom side length of the lower half box. In the compressed state, the upper half box will enclose the lower half box to protect the wastewater inlet valve 7, CO2 intake valve 11, clean water drain valve 15 and other components.

[0051] It should be noted that when the device is transported, the equipment outside the box, such as the insulated LCO2 dewar 9, the air-temperature vaporizer 10, and the control cabinet with integrated sensor display screen 17 and control terminal 22, need to be disassembled and transported separately.

[0052] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. A variable volume high alkaline wastewater treatment device, characterized in that: The invention comprises a box body, a vent pipe (1), a vent valve (2), a wastewater inlet valve (7), a wastewater inlet port (8), an insulated LCO2 dewar tank (9), an air-temperature vaporizer (10), a CO2 inlet valve (11), a CO2 inlet pipe (12), a CO2 aerator (13), a clean water outlet port (14), and a clean water outlet valve (15); the box body comprises an upper box body, a lower box body, and a retractable part (5) connected between the upper box body and the lower box body; a box body top cover (3) is connected to the upper box body, and the lower box body is connected to the box body base (6); a plurality of hydraulic struts (4) are connected between the box body top cover (3) and the box body base (6); a plurality of hydraulic struts (4) are connected between the box body top cover (3) and the box body base (6); a plurality of hydraulic struts (5) are connected between the box body top cover (3) and the box body base (6); a plurality of hydraulic struts (5) are connected between the box body top cover (3) and the box body base (6); a plurality of hydraulic struts (4 ... (3) or the upper half of the box body is connected with a vent pipe (1), 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 body or the box body base (6), a wastewater inlet valve (7) is provided at the wastewater inlet (8), a CO2 inlet pipe (12) is provided with a CO2 inlet valve (11), a clean water outlet (14) is provided with a clean water outlet (15), a CO2 aerator (13) is provided at the inner end of the CO2 inlet pipe (12), and the outer end of the CO2 inlet pipe (12) is connected to an air-temperature vaporizer (10) and an insulated LCO2 dewar tank (9) in sequence.

2. A variable volume high alkaline wastewater treatment device according to claim 1, characterized in that: The invention also comprises 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), wherein the pH sensor (16) is arranged in the housing, and the pH sensor (16) is connected to the sensor display screen (17) outside the housing via a data line; the pressure relief control line (18) is connected to the air relief 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 clean water drainage valve (15), and the pressure relief control line (18), the CO2 intake control line (19), the hydraulic control line (20), and the drainage control line (21) are connected to the control terminal (22).

3. A variable volume high alkaline wastewater treatment device according to claim 1, characterized in that: The upper half box is a regular quadrangular prism structure lacking a lower bottom surface, the telescopic part (5) is a regular quadrangular prism structure lacking upper and lower bottom surfaces, and the lower half box is a regular quadrangular prism structure lacking an upper bottom surface.

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

5. A variable volume high alkaline wastewater treatment device according to claim 1, characterized in that: The air relief valve (2) is an electric knife gate valve.

6. A variable volume high alkaline wastewater treatment device according to claim 1, characterized in that: The air release pipe (1) is a liquid ammonia hose.

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

8. A variable volume high alkaline 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 alkaline wastewater treatment device according to claim 1, characterized in that: The wastewater inlet valve (7) and the clean water drain valve (15) are both pilot-operated electromagnetic valves.

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

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