JPS58150426A - Contact of liquid and gas - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Honya v1 is # from the nozzle! By introducing the concentrating body into the liquid at high speed through the waste layer, 1i!
In recent years, mainly as a result of the increase in the amount of water to be purified, and as a result of advances in biotechnology, the demand for new methods of interfering with gases and liquids has increased steadily. ◎The method is economical in meeting various requirements such as increasing the capacity of the equipment compared to conventionally commonly used mixing reactors, reducing specific investment and energy costs, and reducing residence time during the reaction time. This method is consistent with the following. In fact, no single known method can satisfy all these requirements.
@ck, 52.951-965 (1980))
has thoroughly researched known methods, and according to this l1lf,
Known gas-liquid 111!1 systems can be divided into the following groups depending on the method of energy transfer: compact systems, compressor systems, Bon 1 systems, and combinations thereof.

In practice, different softening of gas quasi-body contacting systems is performed based on the rate of mass transfer, the specific energy consumption type of mass transfer, and the viscosity due to these two factors. In general,
Regarding known systems, it can be said that in the case of highly viscous liquids, it is not possible to achieve both a high mass transfer rate of 1 Ibt'' and a minimum power of 2. In most of these systems, where contact with liquids and liquids is avoided, the rate of mass transfer between the gas and liquid phases is a constant process, and this rate line and other reaction times Increasing the rate of mass transfer can in many cases significantly reduce the reaction time and also reduce the working volume t of the system ◎Increasing the rate of mass transfer V thus increases the It is highly advisable to make the operation of the system dependent only to a limited extent on the viscosity of the liquid phase, when it is possible to increase the viscosity and thereby increase the viscosity. Known systems in general cannot meet this demand; in known systems based on pumps, devices of the type with rushing or impacting liquid jets are gradually being adopted. The characteristics of such a system are that it passes through the GTT-st liquid with the help of an onrushing jet that feeds it from above, while circulating the liquid itself. Two types of such systems are known, viz. One is to entrain the gas by means of a liquid jet pump. In this case, the gas is dispersed within the liquid jet before the impact is applied.
(Refer to IF No. 56,763) The other one is that the free streak liquid jet passing through the gas layer transports the gas horizontally into the liquid by the action of the surface roughness. , first-order dispersion of gas O takes place (Sahugerl,
K, * Chew-IqT@ch, ! $2956
(1980)) A fundamental drawback of this known process, which uses the principle of zero afterglow, is that by increasing the velocity of the liquid jet, the amount of gas per unit of energy molten metal decreases exponentially. Together (V&El d@8ome
, i, and Sm1th, J.M., Chew.
'EDI1. J, 10.225-233 (1975
(see Figure 6), the penetration depth of the body jet is very small in the low velocity range, which is advantageous for the energy of the liquid jet, so its practical use, especially in large-scale industrial applications, is severely restricted. ( Chew, Eal
This is due to the fact that the efficiency actually achieved with this process is lower than that of other types of liquid II contactors (see Chew, IQr., 10.231 (1975)). T@ch, 52.95
1-965 (1980) Table 1 #Reference) 0 The purpose of the present invention is to eliminate the drawbacks of the above solutions, reduce X-rays, bring liquids and gases into contact easily and inexpensively, and to improve the The object of the present invention is to obtain a method of contacting a liquid with a gas that increases the speed of mass transfer and reduces energy consumption. This idea is based on the idea that if the Reynolds number of the liquid jet as it leaves the nozzle is brought to or exceeds 400,000, the efficiency and performance of the system can be significantly improved. This is surprising since, based on the known relationship between liquid jet O velocity and specific gas uptake, one would expect that at such a liquid jet velocity the amount of dissolved gas would decrease rather than increase. In addition, when the length of the free path of the cohesive liquid jet reaches 15 times or exceeds 16 times the diameter of the liquid jet, the amount of scum that can be dissolved by unit energy 9 is further increased. It is based on the idea that it is possible to

Therefore, the real f! # is introduced into the liquid from the congealing liquid T nozzle through the gas layer, and turns into liquid T gas! According to the present invention, the liquid jet t is 11 degrees at 20 to 38 m/sec, preferably 24 to 38 m/sec.
The nozzle ejects with a velocity of 28 m/s and a Reynolds number of at least 400,000, and the free path length of the liquid jet [l! at least 15 of
The method of the present invention can be applied to liquids in most tanks, including solutions or S suspensions, gases, and #2S mixture gas. 11, so it can be used extensively. Possible uses include aerobic fermentation, firewood water purification by aerobic organisms, aeration of fish ponds, catalytic gas-liquid reactions, etc. 1. t is contact water system
The advantages of the gas purification method by mouth and absorption are as follows:
In addition to known methods, the rate of mass transfer can be dramatically increased. Increase the rate of oxygen transfer from the air by up to 50%
~5511101/- hours, which is several times the amount of oxygen that can be bath-dissolved with known equipment.

ψ) This high rate of mass transfer makes it possible to significantly reduce the reaction volume, which in turn increases the concentration of the product. It is.

I K4o Os ′f:l1MIFf b OK 0
．． Only 17-0.38 KWh O energy is required (d) #IIj The transfer is virtually independent of the viscosity of the liquid over a wide range.

(・) It is possible to achieve a very high waste utilization rate, and it is a key to stagnate a small amount of relative gas, that is, to improve the volume utilization rate and achieve a predetermined mass transfer rate.

(f) The method of the invention can be carried out in a very simple device with low investment and maintenance costs. Any known nozzle suitable for generating cohesive liquids can be used in the method of the invention to reduce the specific energy consumption tS1 of substance 1 and to realize an increase in the size of the device. I can do it. In order to reduce flow losses, it is advantageous to use so-called "jet pipes" with a parabolic double-view profile, which are used in Pelton turbines. In a container with a diameter of 0.45 m, 2.5 m% O, S moles of 1IeIR sodium Al were placed, and 0.001% h
/ L's [@:f K [410,0
2 m (pass this sodium sulfite through the D nozzle and mix it with lI'fe, o 22.5 vn/sec (Re: 45G,
The transport rate of M from air at atmospheric pressure is determined by the method based on the oxidation of sodium sulfite (Li7
I.C., V.

and Vae@, v, l Ch@m, Eng, S
ci, 36.1747-68 (see 19811) K
! ff 14 feet L, 40*/#lj at 49.2 and 6
．． This can corresponds to 0.18KWh/MOmO specific energy consumption.

Real mka 2 Real m? The chino described in I11 was repeated, but the difference was that the velocity of the liquid jet was changed to 34.8 m/s (R.:556
．． 000)K and using a diameter of 0.016m0/zkf, the Ruru 0 oxygen dissolution degree is 55.0-〇! / It was temporary. This corresponds to a specific energy consumption type of 0.38 Kwh/1llo* ◎ Implementation M3 * m91i1 (Dj sea urchin 0.001 mol/10 sulfuric acid: z A nozzle with a diameter of 0.06 m at the eave of the presence of the Palt touch rope [
0.5 mol of sodium sulfite was circulated through a container 6.5 m high and 111 m wide. The free path length of the liquid shet is 0.9N@, and its velocity is 2
The dissolution rate of chloride at 5.4 units/sec (Re: 1,524,000) is 54.5110 m/hour at ip
, which is 0.17KWh/s0. Corresponding to the specific energy consumption type of 〇Patent Applicant Ketsuponchi Bartos Hilchirbank R, Chee.

Patent attorney Akira Yoiki Patent attorney Kazuyuki Nishitate Patent attorney Tetsuji Koga Aki Yamaguchi (procedural amendment (C method) April 1980) Commissioner of the Japan Patent Office Kazuo Wakasugi 1, of the case Indication 1982 Patent Consultant No. 224113 2, Title of invention Method for contacting liquid and gas 3, Relationship with the person making the amendment Patent applicant 4, Agent 6, Specification to be amended 7, Details of the amendment An engraving of the book (no changes to the contents) 8. An engraving of the attached documents: 1 copy

Claims (1)

[Claims] 1. High speed III from the nozzle! The liquid jet is introduced into the liquid through the scum layer and brought into contact with the gas, and is ejected from the liquid jet nozzle with a Reynolds number of at least 400,000 at a speed of 20 to 38 m/s and a Reynolds number of at least 400,000. A method for contacting a liquid with a gas, characterized in that the free path length of the liquid jet is maintained at a value of at least 15 times the diameter of the liquid jet. 3. The method according to claim 1, wherein the free path length of the liquid jet is 20 to 25 times the diameter of the liquid jet. 111111@I JJ or the method described in Section 2-