TWI669150B - Gas dissolving system with double mixers - Google Patents

Abstract

The present invention discloses a gas dissolution system using a dual mixer to produce a liquid having a high gas concentration. The gas dissolution system of the present invention mainly comprises two gas mixers, a degassing device, a pressure valve, a check valve, a pressure sensor, and a pump. The liquid flows through the mixer to introduce a gas, so the liquid contains dissolved gas and undissolved gas. The liquid then flows into the degassing device so that the undissolved gas is released to the outside environment and the dissolved gas remains in the liquid. The liquid containing the dissolved gas is mixed with the untreated liquid to be diluted into a liquid of a desired gas concentration and output as a liquid. The liquid flows through the mixer without being mixed with the untreated liquid and a liquid containing a high concentration of gas can be obtained after a plurality of cycles.

Description

Gas dissolution system with dual mixer

The present invention relates to a gas dissolution system using a dual mixer to achieve high gas solubility of the liquid.

The gas is soluble in water, but the solubility varies widely between gases. At atmospheric pressure and standard room temperature (25 degrees Celsius), the solubility of NH ₃ , CO ₂ , O ₃ , O ₂ in water is 700, 1, 0.4 and 0.03 liters per liter of water, respectively. In industrial applications, Venturi is commonly used as a gas and liquid mixer. When the liquid passes through the venturi, the gas can be introduced into the liquid to mix with the liquid. With this method, the introduced gas can only be partially dissolved in the liquid; a considerable portion of the gas is not soluble in the liquid. The gas concentration of the liquid treated via the venturi is typically much lower than the saturation concentration and may not meet certain application requirements. Therefore, there is a need for a system that produces a liquid containing a high concentration of gas.

Ozone in the above-mentioned commonly used gases is becoming more and more important in many industrial applications, such as wastewater treatment and disinfection of drinking water, because ozone can kill pathogenic bacteria, protozoa and viruses.

The main advantage of ozone over toxic and aggressive chemical processes is the ability to provide a safe, effective, and environmentally sound way.

The concentration of ozone required for water disinfection is much lower than that required to clean the wafer. Among the existing cleaning methods, ozone provides a more environmentally friendly choice and in many cases, the effect is better.

Ozone molecules are quite unstable and have a very short half-life. Therefore, it will decay into oxygen (O ₂ ) after a period of time, according to the following reaction formula: 2O ₃ 3O ₂

Because the half-life is very short, the ozone decays immediately after it is produced. The half-life in water is about 30 minutes, indicating that the concentration of ozone in water is reduced by half every half hour.

Since a liquid containing high solubility ozone is not easily available, a system for producing a liquid containing a high concentration of ozone is required.

The system according to the invention uses two sets of vacuum simmer mixers and is equipped with a degassing device and a pressure valve for the purpose of achieving a high gas solubility liquid. One set of mixers is used to draw gas to mix with the liquid; another set of mixers is used to mix liquid and gas-containing liquids from the liquid source. By controlling the pressure valve, the system of the present invention can provide two liquid outputs, one is a gas solution with a high gas concentration, and the other is a gas solution of a common gas concentration, which is a gas solution diluted to a desired gas concentration. .

The system of the present invention can treat gases that are harmful and cannot be directly discharged to the external environment by adding a gas breaker. The liquid containing the gas is introduced into a deaerator equipped with the gas breaker. The gas breaker comprises a gas-breaking medium, and the undissolved gas in the liquid reacts with the gas-breaking medium to become a harmless gas and is released into the external environment.

1‧‧‧ gas dissolution system

2‧‧‧ Liquid source of untreated liquid

4‧‧‧pressure valve

6‧‧‧ Pressure sensor

8‧‧‧ check valve

10‧‧‧Liquid inlet for the first mixer

11‧‧‧Liquid inlet for the first mixer

12‧‧‧Liquid outlet for the first mixer

13‧‧‧ throat inlet of the first mixer

20‧‧‧Second mixer

21‧‧‧Liquid inlet for the second mixer

22‧‧‧Liquid outlet for the second mixer

23‧‧‧ throat inlet of the second mixer

32‧‧‧

33‧‧‧ gas source

34‧‧‧ gas solution outlet

35‧‧‧ valve

40‧‧‧Degassing device

41‧‧‧ Entrance to the degassing device

42‧‧‧Export of degassing device

43‧‧‧Gas vents for degassing devices

45‧‧‧pipe

50‧‧‧ valve

101‧‧‧ pipeline

102‧‧‧pipe

103‧‧‧pipe

Figure 1 shows the configuration of a gas dissolution system with a dual mixer of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

The present invention relates to a gas dissolution system 1 having a dual mixer, the configuration of which is shown in FIG. The system includes two mixers 10, 20, a degassing device 40, a pressure sensor 6, a pressure valve 4, a check valve 8, valves 35, 50 and a pump 32.

As shown in FIG. 1, a first mixer 10 has a liquid inlet 11, a liquid outlet 12, and a throat inlet 13, wherein the liquid inlet 11 is connected to a liquid source 2 of untreated liquid through a pressure valve 4. And the liquid outlet 12 is connected to a gas solution body outlet 34 via a line 101. The line 101 is fitted with a pressure sensor 6 which is electrically connected (shown in phantom in Figure 1) to the pressure valve 4.

The system 1 includes a second mixer 20 having a liquid inlet 21, a liquid outlet 22, and a throat inlet 23. The liquid inlet 21 is connected to the line 101 between the liquid outlet 12 of the first mixer 10 and the pressure sensor 6, and the throat inlet 23 is connected to a gas source 33 through a check valve 8.

The system 1 of the present invention includes a degassing device 40 having an inlet 41, an outlet 42, and a gas vent 43. The inlet 41 of the deaerator 40 is connected to the liquid outlet 22 of the second mixer 20 via a line 103, and the outlet 42 is connected to the throat inlet of the first mixer 10 via a line 45 to which the pump 32 is mounted. 13.

The system of the present invention further includes a valve 50 coupled to the line 45 at a location between the pump 32 and the throat inlet 13 of the first mixer 10.

The mixers 10, 20 can be venturis having a narrow throat at a mid-section. When the primary fluid (first fluid) passes through the venturi, it will accelerate in the throat of the tube and the pressure will drop. The pressure drop in the venturi can be utilized to dip the second fluid (in the present invention a gas) to be mixed with the primary fluid (in the present invention, a liquid). When the gas is introduced into the liquid by the helium Partially dissolved in the liquid, a large part of the gas is not dissolved in the liquid.

The degassing device 40 includes a gas-liquid separator through which the gas that is not dissolved in the liquid will separate from the liquid and be released into the environment as the liquid flows through the gas-liquid separator. When the gas to be treated is ozone, the degassing device 40 will further comprise a gas breaker.

Ozone is harmful to the environment. When ozone is present in the environment, it is a pollutant itself and can damage forests, crops, and human health. The gas decomposer contains ozone decomposing media to decompose ozone into oxygen, thereby avoiding environmental pollution caused by direct ozone emission.

As shown in Fig. 1, liquid is introduced into the gas dissolution system 1 of the present invention from a liquid source 2 of untreated liquid via a pressure valve 4. The pressure valve 4 opens upon receipt of a signal indicative of a pressure by the pressure sensor 6 that is less than a predetermined pressure, as will be described in more detail below.

After the untreated liquid is introduced into the system 1, the liquid flows through the first mixer 10, and then a portion thereof flows along the line 102 rather than along the line 101 because the valve 35 is installed near the end of the line 101. shut down. The liquid flowing along line 102 then flows through second mixer 20. Since the venturi effect forms a pressure drop or a negative pressure (i.e., the pressure is less than atmospheric pressure), the gas from the gas source 33 is introduced into the second mixer 20 via the throat inlet 23 and the liquid flowing through the second mixer 20. mixing.

The liquid flowing out of the second mixer 20 contains dissolved gas and undissolved gas, which is then introduced into a deaerator 40 via line 103. The degassing device 40 includes a gas-liquid separator that separates the gas that is not dissolved in the liquid from the liquid and releases it into the external environment. If the gas is ozone, because the ozone is harmful to the environment, the undissolved ozone needs to be treated before being released to the external environment. This treatment passes the ozone through the breaker in the deaerator 40 to break the ozone and the breaker. The medium reacts and decomposes into oxygen side by side Put it in the outside world.

The outlet 42 of the deaerator 40 is connected to the throat inlet 13 of the first mixer 10 via a line 45 to which the pump 32 is mounted. The liquid flowing out of the deaerator 40 contains dissolved gas and is pumped by the pump 32 and is drawn into the first mixer 10. The liquid that has entered the first mixer 10 is mixed with the liquid from the liquid source 2 of the untreated liquid, and is diluted to a desired concentration to become a gas solution and output from the gas solution body outlet 34.

When valve 35 is closed, lines 101, 102, 103, and 45 will form a closed loop. Since there is no gas solution output, the circuit pressure is constant, and the pressure value shown by the pressure sensor 6 remains unchanged. Because of the action of the pump 32, the liquid in this circuit continues to flow and the gas from the gas source 33 continues to be drawn into the second mixer 20, and the gas concentration in the liquid increases after each cycle until it approaches the saturation concentration. The valve 50 is connected to the line 45 at a position between the pump 32 and the first mixer 10, and when the valve 50 is opened, a liquid having a high gas concentration can be obtained, and the valve 50 becomes an output port of a liquid having a high gas concentration.

The pressure sensor 6 is electrically connected to the pressure valve 4. The degree of opening of the pressure valve 4 is controlled by the pressure sensor 6 sensing the pressure drop in the output line 101. The pressure sensor 6 is configured to send a signal to the pressure valve 4 in accordance with the magnitude of the pressure drop. When the valve 50 is opened, the pressure in the line 101 drops. The pressure drop in the line 101 is sensed by the pressure sensor 6, and the pressure sensor 6 then sends a signal to the pressure valve 4 to open the pressure valve 4. When the valve 50 is closed, the pressure in the line 101 rises to its normal level and the pressure valve 4 is notified by the pressure sensor 6 to close.

The above-described embodiments are to be understood as illustrative and not restrictive, and the invention may be modified or modified without departing from the spirit and scope of the invention. Apply for a patent.

Claims (5)

A gas dissolving system having a dual mixer, comprising: a first mixer (10) having a liquid inlet (11), a liquid outlet (12), and a throat inlet (13), wherein the liquid inlet ( 11) connected to a liquid source (2) of an untreated liquid via a pressure valve (4), and the liquid outlet (12) is electrically connected via a line (101) to which a pressure sensor (6) is mounted a gas solution outlet (34); a second mixer (20) having a liquid inlet (21), a liquid outlet (22), and a throat inlet (23), wherein the liquid inlet (21) is at A liquid outlet (12) of a mixer (10) is connected to the pressure sensor (6) to the line (101), and the throat inlet (23) is connected to the check valve (8) via a check valve (8) a gas source (33); a degassing device (40) having an inlet (41), an outlet (42), and a gas discharge port (43), wherein the inlet (41) is connected via a line (103) a liquid outlet (22) to the second mixer (20), and the outlet (42) is connected to the throat inlet of the first mixer (10) via a conduit (45) mounted with a pump (32) (13); a valve (50) in the pump (32) with the first The throat inlet (13) of the mixer (10) is connected to the line (45). The gas dissolution system of claim 1, wherein the degree of opening of the pressure valve (4) is controlled by a pressure drop of the pipeline (101) sensed by the pressure sensor (6), the pressure sensor (6) according to the pressure The magnitude of the drop is sent to the pressure valve (4). The gas dissolution system of claim 1, wherein the first mixer (10) and the second mixer (20) are each a venturi. The gas dissolution system of claim 2, wherein the first mixer (10) and the second mixer (20) are each a venturi. The gas dissolving system of claim 4, wherein the deaerator (40) comprises a gas-liquid separator and a gas breaker, and the gas source (33) is an ozone source.