Automatic adjusting air dissolving device

Abstract

The utility model discloses an automatic regulation dissolved air device, including water inlet component, backflow component, dissolved air water pipeline, intake component and dissolved air tank, water inlet component passes through backflow component and dissolved air tank water inlet end connection, intake component and dissolved air tank air inlet end connection, dissolved air water pipeline water inlet is connected with dissolved air tank water outlet end, and the dissolved air tank air inlet is connected with dissolved air tank air inlet. The water outlet end of the dissolved air water pipeline is connected with the water inlet assembly, and a pressure stabilizing assembly is arranged on the dissolved air tank. According to the utility model, automatic reflux ratio adjustment, automatic gas-water ratio adjustment and shutdown pressure and liquid level maintaining functions are added, so that the effect of the system for coping with different water inflow and different suspended solids can be effectively improved, optimal parameter operation is adjusted according to different water inflow, and the stability and long-term reliability of the system are improved. The dissolved air tank is subjected to pressure maintaining and liquid level maintaining during shutdown, direct starting can be achieved during next starting, and untreated water is prevented from directly flowing out in the system preparation process during starting.

Description

Technical Field

[0001] The utility model belongs to the technical field of dissolved air systems, and in particular relates to an automatic regulating dissolved air device. Background Art

[0002] The air flotation machine is a water treatment equipment that produces a large number of fine bubbles in the water by the dissolved air system, so that the air is attached to the suspended particles in the form of highly dispersed tiny bubbles, resulting in a state with a density lower than that of water. The buoyancy principle is used to make it float on the water surface, thereby achieving solid-liquid separation. The core of the equipment is the dissolved air tank that produces dissolved air water. The dissolved air efficiency, air-water ratio, and reflux rate of the dissolved air tank determine the efficiency of the rectification equipment.

[0003] In the prior art, the flotation capacity is customized according to the water inflow and water inflow parameters. The parameters such as dissolved gas efficiency, gas-water ratio, and reflux volume need to be adjusted manually or one or two of the parameters need to be fixed. It requires manual experience to adjust. When the water quality and water volume change, the overall effect deteriorates, the efficiency decreases, and the system cannot make corresponding adjustments to the changes in the water inflow. Therefore, a dissolved gas device that can automatically adjust the dissolved gas efficiency, gas-water ratio, reflux volume and other parameters is needed.

[0004] The gas dissolution efficiency is mainly related to the pressure and oxygen concentration of the gas dissolution tank. The maximum solubility of air in water mainly depends on the pressure, water temperature and water quality. The higher the pressure and the lower the water temperature, the greater the saturated solubility of air in water. At the same pressure and temperature, oxygen in the air is more soluble in water than nitrogen. In the gas dissolution process, undissolved nitrogen needs to be discharged.

[0005] The air-water ratio is the ratio of gas to water in the air dissolving tank. During the use of the air flotation air dissolving tank, the ratio of gas to water in the air flotation air dissolving tank needs to be controlled to achieve the best treatment effect. Generally, the ratio of air to wastewater is between 1:3 and 1:5, and the specific ratio needs to be adjusted according to the properties of different wastewaters and the purpose of treatment. For wastewater containing a large amount of particles, grease and other substances, its density is relatively large, and a higher gas content needs to be controlled. The air-water ratio can be appropriately lowered. For wastewater with clearer water quality, the air-water ratio can be appropriately increased.

[0006] The reflux ratio refers to the ratio of the inlet flow rate to the reflux flow rate in the flotation tank. The flotation tank is a device used for water treatment. It separates the pollutants suspended in the water through the action of bubbles, thereby achieving the purpose of purifying the water quality. The flotation reflux ratio is an important operating parameter in the flotation tank and has a great influence on the flotation effect. The larger the flotation reflux ratio, the more water will be refluxed, the longer the bubble residence time will be, and the better the pollutant removal effect will be. However, too much reflux water will also affect the generation of bubbles and the rising speed of pollutants, reducing the treatment effect. Therefore, in practical applications, the flotation reflux ratio needs to be adjusted according to different water quality and treatment requirements to find the best operating parameters. Generally speaking, the value range of the flotation reflux ratio is between 1:1 and 1:3, that is, the ratio of the inlet flow rate to the reflux flow rate is between 1:1 and 1:3. When the pollutant concentration in the flotation tank is high, the reflux water volume should be appropriately increased to increase the bubble residence time and pollutant removal effect. When the pollutant concentration is low, the amount of return water should be reduced appropriately to avoid excessive return water volume affecting the generation of bubbles and the rising speed of pollutants.

[0007] The patent document with the announcement number CN209835839U discloses a mixed flocculation flotation separation device. The utility model mixed flocculation flotation separation device optimizes the coagulation flotation co-coagulation flotation separation process by setting up the pre-pump dosing to realize an independent mixed reaction system, the post-pump pressurized gas dissolving system, the re-dosing mixing reaction and gas dissolving process. At the same time, the electric valve is used to control the high and low pipe drainage to realize the variable water level automatic slag discharge method. However, the device does not disclose the structure and method for automatically controlling the gas dissolving efficiency, gas-water ratio and reflux volume. Utility Model Content

[0008] In order to solve the above technical problems, the utility model provides an automatic regulating gas dissolving device.

[0009] The utility model is realized through the following technical solutions.

[0010] The utility model provides an automatic regulating dissolved air device, comprising a water inlet component, a reflux component, a dissolved air water pipeline, an air inlet component and a dissolved air tank, wherein the water inlet component is connected to the water inlet end of the dissolved air tank through the reflux component, the air inlet component is connected to the air inlet end of the dissolved air tank, the water inlet end of the dissolved air water pipeline is connected to the water outlet end of the dissolved air tank, the water outlet end of the dissolved air water pipeline is connected to the water inlet component, and a pressure stabilizing component is arranged on the dissolved air tank.

[0011] Preferably, the water inlet assembly includes an air flotation body and a water inlet pipe, the air flotation body includes a flocculation zone, a separation zone and a clear water zone, the flocculation zone is arranged at the water inlet end of the air flotation body, the clear water zone is arranged at the water outlet end of the air flotation body, a water outlet pipe is arranged on the clear water zone, the separation zone is arranged between the flocculation zone and the clear water zone, and the water inlet pipe is connected to the water inlet end of the air flotation body.

[0012] Preferably, the reflux assembly comprises a reflux pipe and a reflux pump, the reflux pipe is provided with a reflux pump, a valve A and a liquid flow meter B in sequence from the water inlet end to the water outlet end, and the water outlet end of the reflux pipe is connected to the water inlet end of the dissolved gas tank.

[0013] Preferably, the dissolved air water pipeline includes a dissolved air water pipe and a magnetic flap level gauge, and valve B, a regulating valve and a release head are sequentially arranged on the dissolved air water pipe from the water inlet end to the water outlet end, the water inlet end of the dissolved air water pipe is connected to the water outlet end of the dissolved air tank, the water outlet end of the dissolved air water pipe is arranged in the water inlet assembly, the magnetic flap level gauge is connected to the dissolved air tank, and the release head is arranged in the clear water area.

[0014] Preferably, the air intake assembly includes an air compressor and an air intake pipe, the air outlet end of the air compressor is connected to the air inlet end of the air intake pipe, the air outlet end of the air intake pipe is connected to the air inlet end of the dissolved gas tank, and valve C and a gas flow meter are sequentially arranged on the air intake pipe from the air inlet end to the air outlet end, and the valve C is a manual valve.

[0015] Preferably, the voltage stabilizing assembly includes a valve D and an exhaust pipe, the air inlet end of the exhaust pipe is connected to the air outlet end of the dissolved gas tank, and an electric contact pressure gauge and a valve D are sequentially arranged on the exhaust pipe from the air inlet end to the air outlet end.

[0016] Preferably, a liquid flow meter A and a suspended matter meter are provided on the water inlet pipe, and the suspended matter meter is provided between the liquid flow meter A and the water inlet end of the air flotation body.

[0017] Preferably, a check valve A is provided on the reflux pipe, and the check valve A is provided between the liquid flow meter B and the water inlet end of the gas dissolving tank.

[0018] Preferably, a check valve B is provided on the air inlet pipe, and the check valve B is provided between the gas flow meter and the air inlet end of the gas dissolving tank.

[0019] Preferably, the valve D is a self-operated pressure-stabilizing valve.

[0020] The beneficial effects of the utility model are:

[0021] The utility model adds the functions of automatic adjustment of reflux ratio, automatic adjustment of gas-water ratio and pressure and liquid level maintenance during shutdown, which can effectively improve the system's effect in dealing with different water inflows and different suspended solids, adjust the optimal parameters for different water inflows, and improve the system stability and long-term reliability. When shutting down, the dissolved gas tank is pressure-maintained and the dissolved gas tank is liquid level-maintained, and the system can be started directly at the next startup, avoiding the direct outflow of untreated water during the system preparation process at startup. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] In the figure: 1-water inlet pipe, 2-liquid flow meter A, 3-suspended matter instrument, 4-air flotation body, 5-flocculation zone, 6-separation zone, 7-clean water zone, 8-dissolved air water pipe, 9-valve B, 10-regulating valve, 11-release head, 12-reflux pipe, 13-reflux pump, 14-valve A, 15-liquid flow meter B, 16-check valve A, 17-air compressor, 18-air inlet pipe, 19-valve C, 20-gas flow meter, 21-check valve B, 22-dissolved air tank, 23-magnetic flap liquid level gauge, 24-electric contact pressure gauge, 25-valve D, 26-exhaust pipe, 27-water outlet pipe. DETAILED DESCRIPTION

[0024] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0025] Example:

[0026] like Figure 1 As shown, an automatic regulating dissolved air device includes a water inlet component, a reflux component, a dissolved air water pipeline, an air inlet component and a dissolved air tank 22, wherein the water inlet component is connected to the water inlet end of the dissolved air tank 22 through the reflux component, the air inlet component is connected to the air inlet end of the dissolved air tank 22, the water inlet end of the dissolved air water pipeline is connected to the water outlet end of the dissolved air tank 22, the water outlet end of the dissolved air water pipeline is connected to the water inlet component, and a voltage stabilizing component is arranged on the dissolved air tank 22.

[0027] The water inlet assembly includes an air flotation body 4 and an inlet pipe 1. The air flotation body 4 includes a flocculation zone 5, a separation zone 6 and a clean water zone 7. The flocculation zone 5 is arranged at the water inlet end of the air flotation body 4, and the clean water zone 7 is arranged at the water outlet end of the air flotation body 4. A water outlet pipe 27 is arranged on the clean water zone 7. The water inlet end of the water outlet pipe 27 is connected to the water outlet end of the clean water zone 7. The water outlet pipe 27 is used to discharge water in the clean water zone 7. The separation zone 6 is arranged between the flocculation zone 5 and the clean water zone 7. The water inlet pipe 1 is connected to the water inlet end of the air flotation body 4.

[0028] The reflux assembly includes a reflux pipe 12 and a reflux pump 13. The reflux pump 13, valve A14 and liquid flow meter B15 are sequentially arranged on the reflux pipe 12 from the water inlet end to the water outlet end. The water outlet end of the reflux pipe 12 is connected to the water inlet end of the dissolved gas tank 22. The valve A14 is a manual valve.

[0029] The dissolved air water pipeline includes a dissolved air water pipe 8 and a magnetic flap level gauge 23. A valve B9, a regulating valve 10 and a release head 11 are sequentially arranged on the dissolved air water pipe 8 from the water inlet end to the water outlet end. The water inlet end of the dissolved air water pipe 8 is connected to the water outlet end of the dissolved air tank 22. The water outlet end of the dissolved air water pipe 8 is arranged in the clean water area 7. The magnetic flap level gauge 23 is connected to the dissolved air tank 22. The release head 11 is arranged in the clean water area 7 of the water inlet component. The valve B9 is a manual valve.

[0030] The air intake assembly includes an air compressor 17 and an air intake pipe 18, the air outlet end of the air compressor 17 is connected to the air inlet end of the air intake pipe 18, the air outlet end of the air intake pipe 18 is connected to the air inlet end of the dissolved gas tank 22, and a valve C19 and a gas flow meter 20 are sequentially arranged on the air intake pipe 18 from the air inlet end to the air outlet end, and the valve C19 is a manual valve.

[0031] The voltage stabilizing assembly includes a valve D25 and an exhaust pipe 26. The air inlet end of the exhaust pipe 26 is connected to the air outlet end of the dissolved gas tank 22. The exhaust pipe 26 is provided with an electric contact pressure gauge 24 and a valve D25 in sequence from the air inlet end to the air outlet end.

[0032] The water inlet pipe 1 is provided with a liquid flow meter A2 and a suspended matter meter 3 , and the suspended matter meter 3 is provided between the liquid flow meter A2 and the water inlet end of the air flotation body 4 .

[0033] The reflux pipe 12 is provided with a check valve A16 , which is arranged between the liquid flow meter B15 and the water inlet end of the gas dissolving tank 22 .

[0034] The air inlet pipe 18 is provided with a check valve B21 , which is arranged between the gas flow meter 20 and the air inlet end of the gas dissolving tank 22 .

[0035] The valve D25 is a K-type self-operated pressure-stabilizing valve, and the excess gas in the gas dissolving tank 22 is discharged through the self-operated pressure-stabilizing valve 25 .

[0036] The control method of the utility model comprises the following steps:

[0037] Pressure of dissolved gas tank: The air compressor 17 pressurizes the dissolved gas tank 22, and the air intake flow is adjusted through the manual valve 19. The excess gas is discharged through the self-operated pressure-stabilizing valve 25. The pressure of the dissolved gas tank 22 is adjusted by the self-operated pressure-stabilizing valve 25. The self-operated pressure-stabilizing valve 25 is a mechanical automatic regulating valve that stabilizes the pressure at the front end of the valve. When the pressure at the front end of the self-operated pressure-stabilizing valve 25 is greater than the set pressure, the excess pressure is discharged. When the pressure at the front end of the self-operated pressure-stabilizing valve 25 is lower than the set pressure, the valve is closed to maintain the pressure of the dissolved gas tank 22.

[0038] Reflux ratio: The flow rate of the reflux pipe 12 is calculated by the inlet flow rate and the inlet suspended matter feedback. The calculated value is the flow setting value of the reflux pipe 12. The reflux pump 13 and the liquid flow meter 15 form a closed-loop control. The feedback value of the liquid flow meter 15 is controlled by adjusting the operating frequency of the reflux pump 13.

[0039] Gas-water ratio: The gas-water ratio is calculated by the inlet flow rate and the inlet suspended matter feedback, and the calculated value is the gas-water ratio setting value. The reflux pump 13 pumps the reflux water into the dissolved gas tank 22, so that the liquid level in the dissolved gas tank 22 rises, and the pressure in the dissolved gas tank 22 drives the dissolved gas water in the tank into the separation zone 6 through the dissolved gas water pipe 8. The electric regulating valve 10 and the liquid level detection magnetic flap 23 form a closed-loop control. The liquid level inside the dissolved gas tank 22 is adjusted by adjusting the opening of the electric regulating valve 10, so that the liquid level is stabilized to the set value, thereby adjusting the gas-liquid level ratio in the dissolved gas tank 22.

[0040] The method of using the utility model comprises the following steps:

[0041] S1: The device starts, and automatically sets the reflux ratio and gas-water ratio according to the inlet flow rate and the inlet suspended solids system, that is, the required flow rate of the saturated dissolved gas mixture to adapt to the changes in the inlet water quality and the inlet flow rate;

[0042] S2: The air compressor 17 and the reflux pump 13 are started, the air compressor 17 pressurizes the dissolved gas tank 22, the intake air flow is adjusted by the valve C19 on the intake pipe 18, and the self-operated pressure-stabilizing valve 25 on the exhaust pipe 26 adjusts the pressure of the dissolved gas tank 22. It only needs to be debugged once during debugging, and no subsequent adjustment is required;

[0043] S3: Reflux: 13 forms a closed-loop control with the liquid flow meter B15, automatically adjusts the frequency of the reflux pump 13 to control the reflux amount, and adjusts the reflux amount to the set value corresponding to the reflux ratio; the electric regulating valve 10 on the dissolved air water pipeline and the magnetic flap level meter 23 on the dissolved air tank 22 form a closed-loop control, automatically adjusts the opening of the electric regulating valve to control the flow of the dissolved air water pipeline, thereby controlling the liquid level in the dissolved air tank 22, adjusting the gas-water ratio in the dissolved air tank 22, and adjusting the gas-water ratio to the set value; when the water inlet of the system is stable, the reflux ratio and the gas-water ratio will always be maintained at the optimal parameters to increase the dissolved air efficiency and dissolved air effect

[0044] S4: When the system is shut down, the air compressor 17 and the reflux pump 13 are stopped, the electric regulating valve 10 of the dissolved air water pipeline is closed, and the self-operated pressure-stabilizing valve 25 on the exhaust pipe 26 will automatically close after the excess pressure is discharged, and the pressure of the dissolved air tank 22 is maintained at the set pressure. Since both the reflux pipe 12 and the air inlet pipe 18 are provided with check valves, the pressure and liquid level in the dissolved air tank 22 are maintained at the set values, achieving the function of maintaining pressure and liquid level. The system can be started directly at the next start without waiting for the pressurization and water addition process.

Claims

1. An automatic regulating gas dissolving device, characterized in that: The invention comprises a water inlet component, a reflux component, a dissolved air water pipeline, an air inlet component and a dissolved air tank (22), wherein the water inlet component is connected to the water inlet end of the dissolved air tank (22) via the reflux component, the air inlet component is connected to the air inlet end of the dissolved air tank (22), the water inlet end of the dissolved air water pipeline is connected to the water outlet end of the dissolved air tank (22), the water outlet end of the dissolved air water pipeline is connected to the water inlet component, and a voltage stabilizing component is arranged on the dissolved air tank (22).

2. An automatic regulating gas dissolving device as claimed in claim 1, characterized in that: The water inlet assembly comprises an air flotation body (4) and a water inlet pipe (1); the air flotation body (4) comprises a flocculation zone (5), a separation zone (6) and a clean water zone (7); the flocculation zone (5) is arranged at the water inlet end of the air flotation body (4); the clean water zone (7) is arranged at the water outlet end of the air flotation body (4); a water outlet pipe (27) is arranged on the clean water zone (7); the separation zone (6) is arranged between the flocculation zone (5) and the clean water zone (7); and the water inlet pipe (1) is connected to the water inlet end of the air flotation body (4).

3. The automatic regulating gas dissolving device according to claim 1, characterized in that: The reflux assembly comprises a reflux pipe (12) and a reflux pump (13). The reflux pump (13), a valve A (14) and a liquid flow meter B (15) are arranged in sequence on the reflux pipe (12) from the water inlet end to the water outlet end. The water outlet end of the reflux pipe (12) is connected to the water inlet end of the dissolved gas tank (22).

4. The automatic regulating gas dissolving device according to claim 1, characterized in that: The dissolved air water pipeline comprises a dissolved air water pipe (8) and a magnetic flap level gauge (23); a valve B (9), a regulating valve (10) and a release head (11) are sequentially arranged on the dissolved air water pipe (8) from the water inlet end to the water outlet end; the water inlet end of the dissolved air water pipe (8) is connected to the water outlet end of the dissolved air tank (22); the water outlet end of the dissolved air water pipe (8) is arranged in a water inlet assembly; the magnetic flap level gauge (23) is connected to the dissolved air tank (22); and the release head (11) is arranged in the water inlet assembly.

5. The automatic regulating gas dissolving device according to claim 1, characterized in that: The air intake assembly comprises an air compressor (17) and an air intake pipe (18); the air outlet end of the air compressor (17) is connected to the air inlet end of the air intake pipe (18); the air outlet end of the air intake pipe (18) is connected to the air inlet end of the air dissolving tank (22); a valve C (19) and a gas flow meter (20) are sequentially arranged on the air intake pipe (18) from the air inlet end to the air outlet end; the valve C (19) is a manual valve.

6. The automatic regulating gas dissolving device according to claim 1, characterized in that: The pressure stabilizing component comprises a valve D (25) and an exhaust pipe (26); the air inlet end of the exhaust pipe (26) is connected to the air outlet end of the gas dissolving tank (22); and the exhaust pipe (26) is provided with an electric contact pressure gauge (24) and a valve D (25) in sequence from the air inlet end to the air outlet end.

7. An automatic regulating gas dissolving device as claimed in claim 2, characterized in that: The water inlet pipe (1) is provided with a liquid flow meter A (2) and a suspended matter meter (3), and the suspended matter meter (3) is arranged between the liquid flow meter A (2) and the water inlet end of the air flotation body (4).

8. An automatic regulating gas dissolving device as claimed in claim 3, characterized in that: The reflux pipe (12) is provided with a check valve A (16), which is arranged between the liquid flow meter B (15) and the water inlet end of the gas dissolving tank (22).

9. An automatic regulating gas dissolving device as claimed in claim 5, characterized in that: The air inlet pipe (18) is provided with a check valve B (21), which is arranged between the gas flow meter (20) and the air inlet end of the gas dissolving tank (22).

10. An automatic regulating gas dissolving device as claimed in claim 6, characterized in that: The valve D (25) is a self-operated pressure-stabilizing valve.

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